PANEL B

MODULATION
BENDER
JX-305 Sep. 1998
JX-305
GROOVESYNTH
SERVICE NOTES
First Edition
Issued by RJA
SPECIFICATIONS
JX-305:GROOVESYNTH
● Keyboard
61 keys (with velocity and channel aftertouch)
● Power Supply
AC Adaptor (DC 9V)
TABLE OF CONTENTS
Page
Specifications ............................................................................................... 1
Panel layout
............................................................................................... 2
Panel Layout Patrs List
............................................................................................... 2
Exploded view ............................................................................................... 3
Parts list
............................................................................................... 4
Identifying the version number
............................................................................................... 6
Saving and loading user data
............................................................................................... 6
Factory preset
............................................................................................... 8
Upgrading the program memory software version
............................................................................................... 8
Test mode
............................................................................................... 9
Keyboard parts list
............................................................................................... 16
Keyboard disassembly
............................................................................................... 16
Block diagram ............................................................................................... 18
Circuit board (MAIN)
............................................................................................... 20
Circuit diagram (DIGITAL)
............................................................................................... 21
Circuit diagram (SND_PWR)
............................................................................................... 22
Circuit diagram (INTERFACE)
............................................................................................... 23
Circuit board (PANEL A)
............................................................................................... 24
Circuit diagram (PANEL A)
............................................................................................... 25
Circuit board (PANEL B)
............................................................................................... 26
Circuit diagram (PANEL B)
............................................................................................... 27
● Tone Generator
Maximum Polyphony :64 voices
Parts
:24 parts (8 + RPS:16)
Built-in Effects
:Reverb, Delay, Multi-Effects (24 types)
Patches
:Preset:640 User:256 Card:512
Rhythm Set :Preset: 32 User: 20 Card: 20
● Sequencer
Tracks
:8 + Mute Ctrl
Songs :50
Preset Patterns :274
RPS Patterns :494
User Patterns
:200 (Maximum)
Card Patterns
:200 (Maximum)
Maximum Note Storage :approx. 75,000 notes (Internal)
:approx. 220,000 notes (2M Card)
:approx. 480,000 notes (4M Card)
RPS Set :60
Pattern Set :30
Tempo :20.0 - 240.0
Resolution
:96 ticks per quarter note
Recording Method :Realtime, Step1, Step2
Quantize
:Grid, Shuffle, Groove (71 types)
● Connectors
Output Jacks (L (MONO), R)
Phones Jack
MIDI Connectors (IN, OUT, THRU)
Pedal Hold Jack
Pedal Control Jack
Pedal Switch Jack
Memory Card Slot
● Display
LCD : 16 characters, 2 lines
Beat LED
● Current Draw
450 mA
● Output Impedance
2.2 kΩ
● Dimensions
1,011 (W) x 289 (D) x 83 (H) mm
39-13/16 x 11-7 / 16 x 3-5 / 16 inches
● Weight
6.9 kg / 15 lbs 4 oz (Excluding AC Adaptor)
● Accessories
Owner's Manual Set (English)
Owner's Manual Set (Japanese)
Card Protector
AC adaptor
ACI-100C
ACI-120C
ACI-230C
ACB-230(E)
ACB-240(A)
● Options
Stereo Headphones
Pedal Switch
Audio Connection Cable
MIDI Cable
SmartMedia
(PNo.71122389)
(PNo.71011667)
(PNo.01346312)
(PNo.00905756)
(PNo.00905767)
(PNo.01018312)
(PNo.01458278)
(PNo.12449549)
:RH-20/80/120
:DP-2/6, BOSS FS-5U
:PJ-1M
:PCS-075W/150W/250W
:MSC15/25/50
:S2M-5/S4M-5
Copyright © 1998 by ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION.
17059943 Printed in Japan AA00 (DP) 1
1

JX-305 Sep. 1998
PANEL LAYOUT/
FRONT VIEW
q
r t
w
er t
w
r
t
w
!5 !6 !7
!2 t
!4
y
w y r y u yi o !0 y
!1 u !0 !3 !4 !4
REAR VIEW
q w e r ty
PANEL LAYOUT PARTS LIST/
[FRONT VIEW PARTS LIST]
No. Part Number Part Name
01452301 J R-KNOB SF BLK/LCG
01453134 ROTARY POT. EVJY15F01A54
01453412 ROTARY POT. EVUJFUFK1B14
01565256 ROTARY POT. EVUJFYFK1B14 with CENTER Click
01340290 TACT SW. EVQ11A
00899023 LED LNJ282RKRXE
00348490 LED SLR-325VCT31 (RED)
00560745 LED SLR-325MCT31 (GREEN)
15029342 LED GL3ED8 (2 COLORS)
[REAR VIEW PARTS LIST]
No. Part Number Part Name
01343101 D C-ESCT BX1H BLK
01341178 CARD CONNECTOR CN015S-3013-0
13429274 MIDI JACK YKF51-5041
00569278 JACK LGR4609-7000
13449720 DC IN HEC2305-01-250
22360712 CORD HOOK 236-712
13149125 EST206B POWER SW
00900189 D S-KEYTOP SX1H BLK
00900145 D S-KEYTOP SD1H BLK
00900156 D S-KEYTOP SD2H BLK
22495277 D S-KEYTOP MD1H BLK
01013023 D S-KEYTOP SD1H DRD
00900190 D S-KEYTOP SX2H BLK
00900167 D S-KEYTOP SD3H BLK
22495278 D S-KEYTOP MD2H BLK
22495275 D S-KEYTOP MX2H BLK
22495272 D S-KEYTOP MD4H BLK
01129334 LCD DM1628-0AUB
22485303 D R-KNOB L BLK 248-303
01013223 ENCODER EVQ VEM F01 24B
2

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
EXPLODED VIEW/
[PARTS]
No. Part No. Part Name
q 01129334 LCD DM16280AUB
w 01452201 TOP PANEL
e 01452212 BOTTOM COVER
r 01452223 SIDE PANEL R
t 01452234 SIDE PANEL L
y 01452245 DISPLAY COVER
u 01452256 DISPLAY HOLDER
i 01455990 DUST COVER
o 12359139 FOOT FF-018 BLK
!0 13149125 AC SW EST206B 5A/125V
!1 22205900 PANEL HOLDER
!2 22360712 CORD HOOK 236-712
!3 71017078 BENDER PB-A0113
!4 71011689 SK-861-K KEYBOARD ASSY
!5 71011634 MAIN PWB ASSY
!6 71011723 PANEL A ASSY
!7 71017190 PANEL B ASSY
!8 01452301 J R-KNOB SF BLK/LCG
!9 22485303 D R-KNOB L BLK 248-303
[SCREW]
No. Part No. Part Name
A 40011045 Binding Taptight B 2 X 6 ZC
B 40011056 Binding Taptight B 3 X 6 ZC
C 40011067 Binding Taptight B 3 X 8 ZC
D 40011123 Binding Taptight B 4 X 8 BZC
E 40011490 Double Sems 3 X 6 BZC
F 40011512 Double Sems 3 X 12 BZC
G 40011189 Pan Taptight P 3 X 8 ZC
H 40011201 Pan Taptight P 3 X 8 BZC
I 40239734 Binding Taptight VWH 3 X 6 ZC
3

JX-305 Sep. 1998
PARTS LIST/
SAFETY PRECAUTION:
The parts marked have safetyrelated
characteristics.
Use only listed parts for
replacement.
CASING
NOTE : The parts marked # are new (initial parts).
01343101 D C-ESCT BX1H BLK
# 01452201 TOP PANEL
# 01452212 BOTTOM COVER
# 01452223 SIDE PANEL R
# 01452234 SIDE PANEL L
# 01452245 DISPLAY COVER
12359139 FOOT FF-018BLK
22360712 CORD HOOK 236-712
CHASSIS
# 01343090 LED SPACER
# 01452256 DISPLAY HOLDER
# 01452323 ENCODER HOLDER
01455901 LED SPACER LH-36-9
# 01455990 POT DUST COVER
22205900 PANEL HOLDER
KNOB.BUTTON
00900145 D S-KEYTOP SD1H BLK
00900156 D S-KEYTOP SD2H BLK
00900167 D S-KEYTOP SD3H BLK
00900189 D S-KEYTOP SX1H BLK
00900190 D S-KEYTOP SX2H BLK
01013023 D S-KEYTOP SD1H DRD
# 01452301 J R-KNOB SF BLK/LCG
22485303 D R-KNOB L BLK 248-303
22495272 D S-KEYTOP MD4H BLK
22495275 D S-KEYTOP MX2H BLK
22495277 D S-KEYTOP MD1H BLK
22495278 D S-KEYTOP MD2H BLK
SWITCH
01340290 EVQ11A H=5.0 TACT SW
13149125 EST206B 5A/125V POWER SW
JACK
00569278 LGR4609-7000 STEREO JK2-7 on MB
13429274 YKF51-5041 MIDI JK1 on MB
13449720 HEC2305-01-250 DC IN JK8 on MB
DISPLAY UNIT
01129334 DM1628-0AUB LCD SHARP
BENDER UNIT
71017078 PB-A0113
KEYBOARD
# 71011689 SK-861-K KEYBOARD ASSY
CONSIDERATIONS ON PARTS ORDERING
When ordering any parts listed in the parts list, please specify the following items in the order sheet.
QTY PART NUMBER DESCRIPTION MODEL NUMBER
Ex. 10 22575241 Sharp key C-20/50
15 2247017300 Knob (orange) DAC-15D
Failure to completely fill the above items with correct number and description will result in delayed or even
undelivered replacement.
4
10 22575241 Sharp key C-20/50
15 2247017300 Knob (orange) DAC-15D
MB
PA
PB
: PWB MAIN ASSY
: PWB PANEL A ASSY
: PWB PANEL B ASSY
PCB ASSY
# E 71011634 PWB MAIN ASSY
# 71011723 PWB PANEL A ASSY
# 71017190 PWB PANEL B ASSY
IC
00127490 TC7W08F DUAL 2in AND IC29 on MB
00129278 SSC1080F0B KEYSCAN IC4 on MB
00897078 RA01-005 (TC170C200AF-005) CUSTOM IC6 on MB
00899812 LH28F800SUT-70 FLASH MEMORY BLANK IC1,7 on MB
# 01342390 UPD23C16000WGY-834-MKH 16M MASK ROM IC8 on MB
01342401 LHMN0PNH 64M MASK ROM IC3 on MB
# 01342978 TC160G22AF-1253 CUSTOM IC31 on MB
01344056 SI-8501L REGULATOR +5V IC27 on MB
01347745 TMS418169A-60 16M DRAM IC2 on MB
01347756 LH62800K-50 2M DRAM IC33 on MB
01451578 AK4324-VF-E2 DAC IC24 on MB
# 01455878 TC74AC574P OCT. D-F/F DIP IC4 on PA,IC1 on PB
# 01456856 BA10358F DUAL OPAMP SOP IC37 on MB
# 01564078 HD6437042AE32F CPU MASK IC5 on MB
# 01565201 LHMN5KWB WAVE MASK ROM IC9 on MB
15169605 TC74HC4052AP DUAL 4:1 ANALOG-MPX DIP IC2 on PA
15189186 UPC4570C DUAL OPAMP DIP IC3 on PA
15189249 BA10324A QUAD OPAMP DIP IC1 on PA
15199937 M51953BFP-600C RESET IC IC26 on MB
15249104 TC7S04F INV IC34 on MB
15249111 TC7WU04F TRI. INV IC16 on MB
15249125T0 TC74HC32AF QUAD 2in OR IC30 on MB
15259758T0 TC74HC175AF QUAD D-F/F IC32 on MB
15259769T0 TC74HC238AF 3 to 8 DECODER IC35,36 on MB
15259778T0 TC74HC245AF OCT. BUS BUFFER IC20 on MB
15259885 TC7S32F 2in OR IC11 on MB
15269219H0 HD74LS05FPEL TTL HEX INV(OPEN DRAIN) IC19 on MB
15289105 UPC4570G2 DUAL OPAMP SOP IC25 on MB
15289109 M5216FP-600D DUAL OPAMP SOP IC23 on MB
15289125 PC-410T PHOTO ISOLATOR IC18 on MB
15289402 TA78L05F REGULATOR +5V IC28 on MB
TRANSISTOR
00239801 DTA114EU DIGITAL Q3,10,14,15 on MB
00239812 DTC114EU DIGITAL Q5 on MB
00562012 2SC3265-Y Q13 on MB
01121278 2SA1576A Q1,2,11 on MB
01121289 2SC4081 Q4,6,7,12,30 on MB
# 01455934 RN1421 DIGITAL Q23-29 on MB
# 01567867 DTA144WUA DIGITAL Q10 on MB
15329505 DTC314TK DIGITAL Q8,9,21,22 on MB
DIODE
01016101 RD4.7S ZENER D2,3 on MB
15019126 1SS133 SWITCING
15339120T0 1SS302 ARRAY DA1-8 on MB
15339203 SFPB54 SCHOTKEY D4 on MB
LED
00348490 SLR-325VCT31 RED
00560745 SLR-325MCT31 GREEN D28 on PA
00899023 LNJ282RKRXE RED LONG LEAD D8,12,15,23,27,29,38,42,43 on PA,D32-34 on PB
15029342 GL3ED8 2COLERS D24 on PB
RESISTOR
# 01011856 RPC05T 0R0 J 0OHM L3-8, R4,5,7,236,300,310,C7,36,80,87,90 on MB
01013923 EXBV8V100JV ARRAY RA67,9-11,13,25-29 on MB
# 01457145 EXBE10C103J ARRAY RA1-5,8,12,14-16 on MB
# 01457156 EXBE10C332J ARRAY RA23 on MB
15399365 RPC10T 470 J 1/10W CHIP R58,79,203,204 on MB
15409113 EXBV8V103JV ARRAY RA17-19,22 on MB
00126112 EXBV8V101JV ARRAY RA20,21,24 on MB
4

JX-305 Sep. 1998
POTENTIONMETER
# 01453134 EVJY15F01A54 L=12.5 STEREO VR VR10 on PA
# 01453412 EVUJFUFK1B14 L=12.5 VR1-5,7-9 on PA
# 01565256 EVUJFYFK1B14 L=12.5 CENTER CLICK VR6 on PA
CRYSTAL
00901912 MA-406 24.576MHZ X2 on MB
01126267 MA-406 7.056MHZ X1 on MB
ENCODER
01013223 EVQ VEM F01 24B EN1 on PB
CAPACITOR
# 01015845 ECHU1H181JB5 FILM CHIP C127,132 on MB
01015856 ECHU1H221JB5 FILM CHIP C144,168 on MB
# 01015890 ECHU1H122JB5 FILM CHIP C150,171 on MB
# 01349312 GRM39F105Z10PT CERAMIC CHIP C166,184,263,266 on MB
# 01349378 TCFGA0J475M8R TANTALUM CHIP C79,157,163 on MB
# 01565567 ECHU1C473JB5 FILM CHIP C254,255 on MB
13639546M0 ECEA1CKA100B CHEMICAL(LOW) C23,110 on MB
13639550M0 ECEA1CKA101B CHEMICAL(LOW) C1 on PA,C2 on PB
13649210M0 CAPACITOR ECEA1CKN100B CHEMICAL BIPORLER C63 on MB
MISCELLANEOUS
01450745 QFP HEATSINK
12199584 M1698 GROUNDING TERMINAL
ACCESSORIES(Standard)
71011667 OWNER'S MANUAL SET(JAPANESE)
71122389 OWNER'S MANUAL SET(ENGLISH)
01346312 CARD PROTECTOR
00905756 ACI-100C AC ADAPTOR 100V(DC9V.1000mA)
00905767 ACI-120C AC ADAPTOR 120V(DC9V.1000mA)
01018312 ACI-230C AC ADAPTOR 230V(DC9V.1000mA)
# 01458278 ACB-230E AC ADAPTOR 230VE(DC9V.1200mA)
12449549 ACB-240(A) AC ADAPTOR 240VA(DC9V.1200mA)
FILTER.BEADS
# 01565578 N1608Z601 BEAD CHIP L1,2,9-11,13,14-21-26,31 on MB
# 01565589 N1608ZA601 BEAD CHIP L29,30 on MB
# 01565590 N1608ZA331 BEAD CHIP L19 on MB
# 01565601 N1608ZA121 BEAD CHIP L27 on MB
# 01565612 DSS310-93D223S50 FILTER FL1 on MB
# 01567501 EXC3BB102 BEAD CHIP L12 on MB
12449355 FBR07HA850TB00 FERRITE BEAD L1,2 on PA,L1,2 on PB
CONNECTOR
00904612 52806-1410 FPC CN4 on MB
01120578 IL-FPC-26SL-N FPC CN5,6 on MB,CN1 on PA,CN1 on PB
01341178 CN015S-3013-0 CARD CN11 on MB
13369605 52147-1010 WIRE TRAP CN8 on MB
13379157 IL-FPC-16SL-N FPC CN2 on MB
13379158 IL-FPC-18SL-N FPC CN1 on MB
13429299 51048-1000 CABLE HOLDER CN2 on PA
13439351 IL-S-6P-S2L2-EF CN7 on MB
WIRING.CABLE
00890401 10X150-P2.0 RIBBON CABLE PA-MB
# 01453378 26X550-A6.0BB-P1.25H10 FUJI CARD PB-MB
# 01454123 WIRING W-1 MB-PWSW
# 01454134 WIRING W-2 MB-PWSW
# 01456912 26X250-A6.0BBR-P1.25H10 FUJI CARD PA-MB
# 01454512 16X200-A6.0BBR-P1.25H10 FUJI CARD KBD-MB
# 01567389 18X250-A6.0BBR-P1.25-HBL10 FUJI CARD KBD-MB
SCREW
40011056 3x6mm BINDING B-TIGHT ZC
40011067 3x8mm BINDING B-TIGHT ZC
40011045 2x6mm BINDING B-TIGHT ZC
40011123 4x8mm BINDING B-TIGHT BZC
40011189 3x8mm PAN P-TIGHT ZC
40011201 3x8mm PAN P-TIGHT BZC
40011490 3x6mm SEMS BZC
40011512 3x12mm SEMS BZC
# 40239734 3x6mm VWH B-TIGHT ZC
PACKING CASE
# 01564678 PAD L
# 01564689 PAD R
# 01564690 ADAPTOR PAD
# 01564701 CENTER PAD
# 01564667 PACKING CASE
# 40340023 PE FORM BAG 0.5*1160*450
5

JX-305 Sep. 1998
IDENTIFYING THE VERSION
USER DATA SAVE AND LOAD
NUMBER
You can save the user data to a memory card (=
1. Turn the power on.
2. While holding [PATCH], [PTN/SONG] and [TEMPO &
MEASURE], press [NUMBER 4 (CLAP)], [NUMBER
6 (TOM / PERC)], [NUMBER 8 (OTHERS)] in order.
SmartMedia).
Before perform the data saving, you must format a
memory card by using the following procedure.
Format a Memory Card (Smart Media)
1. With the power turned off, insert a memory card (2MB
(S2M-5) or 4MB (S4M-5)) into the memory card slot.
2. Turn on the power.
1
2
3
4
3. Press [UTILITY].
The indicator will light.
3. The system program version will be displayed.
Every time press the [NUMBER 8 (OTHERS)], readout
on the display changes as follows.
SYSTEM CPU DATA
4. Press PAGE [] several times to select "CARD", and
press [ENTER].
5. Press PAGE [] several times to select "FORMAT",
and press [ENTER].
The formatting page will appear.
6. Press [ENTER].
The following display will appear, and the Format
operation will be carried out.
7. When formatting ends, the following display will appear.
To exit the formatting page, press [UTILITY].
6

JX-305 Sep. 1998
Saving the user data (User Backup)
Restoring the Saved Setting Back to Internal
Memory (Backup Load)
1. Make sure that a memory card is inserted into the
memory card slot.
1. Make sure that a memory card is inserted into the
memory card slot.
2. Press [UTILITY].
The indicator will light.
2. Press [UTILITY].
The indicator will light.
3. Press PAGE [] several times to select "CARD", and
press [ENTER].
3. Press PAGE [] several times to select "CARD", and
press [ENTER].
4. Press PAGE [] several times to select "USER
BACKUP", and press [ENTER].
4. Press PAGE [] several times to select "Backup
The User Backup page will appear.
Load", and press [ENTER].
The User Backup page will appear.
5. Press [ENTER].
The following display will appear, and the User Backup
5. Press [ENTER].
operation will be carried out.
The following display will appear, and the User Backup
operation will be carried out.
6. When User Backup has been completed, the following
display will appear.
6. When Backup Load has been completed, the following
display will appear.
If you wish to exit the User Backup page, press [UTILITY].
If you wish to exit the User Backup page, press [UTILITY].
7

JX-305 Sep. 1998
FACTORY PRESET
Upgrading the program memory
software version
JX-305 uses the FLASH MEMORY.
These ROMs can be update the program by transferring the
data in the upgrading disk (SMF format), through MIDI.
Required Items
⋅ JX-305 Version Up Disk Set (PNo. 17048906)
(The Version up disk contains the JX-305 program
converted into SMF data. Obtain the latest version from
the service center.)
⋅ Sequencer (Anything that will play back SMF will do.)
⋅ MIDI cable
Update procedure
1. Connect MIDI OUT of the Sequncer with MIDI IN of the
JX-305.
2. Turn the power on while holding down [MUTE CTRL]
button, hold on to press [MUTE CTRL], press the
[NUMBER 3 (HH)] button.
Display Shows as follows
NOTE: It take about 1 minute to complete the data loading.
Never turn the power off while this procedure.
3. Press the [ENTER] button, then JX-305 check the ROM-
ID number.
And display shows as follows.
Check to see that the display shows as described above
and then playback the SMF data. When the update
procedure is in normal operation, BEAT LED will blink.
The file names are as follows.
_000001.mid
_000002.mid
|
_000016.mid
8

JX-305 Sep. 1998
(For cases where program data volume is small, the file
count is less than 16.)
TEST MODE
While playing, a check sum appears on the display.
NOTE: Before executing test mode, be sure to backup user
data as explained in the section "Saving and Loading
One = **** : Check sum of the each file.
AL = **** : Total.
user data". And when you execute test mode, the
various parameters will be given special settings.
After executing test mode, be sure to load the
After the all files has been played, compare the original
checksum (described on disk label or Service
Information) to the current checksum for discrepancies.
Factory preset data, and the User data.
Required items
MIDI Cable
x1
SmartMedia
x2 (Formatted/Protected)
Foot Pedal (DP-2 etc.)
x2
Update procedure is complete.
Expression Pedal (EV-5 etc.) x1
Monitor Speaker (MA-12 etc.) x2
After executing update procedure, be sure to perform the
Factory Preset data loading.
Entering the TEST MODE
1. Connect the Monitor Speaker to the OUTPUT of the JX-
305.
2. Turn the power on while holding down [ENVELOPE],
[PART SELECT] and [PART MUTE].
You will enter the TEST MODE and the following basic
display will appear.
3. Press [ENTER]. TEST MODE will be started.
As a rule, tests are in the order of test number, but you can
select the each test items directory by pressing the [BANK 1]
to [BANK 8], [NUMBER 1 (BD)] [NUMBER 2 (SD)]
[NUMBER 8 (OTHERS) ] while pressing [SHIFT] button
when LCD displays "JX-305 Test Mode".
9

JX-305 Sep. 1998
Exiting the TEST MODE
1-2. When the test of the each device end, display --- will
change to "ok" or "NG". If test result are "ok", next test
When Bender Test ends, the following display appear.
runs automatically.
Troubleshooting for Memory test
Press [ENTER] button to load the factory preset data.
Result of Test
Prg NG!
Dat NG !
Check
Check IC1 on Main Board
Check IC8 on Main Board
NOTE: It takes about 1 minute to complete the data loading.
Never turn the power off while this procedure.
Usr NG !
RAM NG !
Check IC7 on Main Board
Check IC2 on Main Board
2. MIDI test
Test Item
When Memory Test ends normally, MIDI Test runs
The JX-305 has the following 11 items.
automatically.
Some test items will be started automatically, when the next
(or in the initial display of the test mode, press [BANK 2]
previous test ends normally.
while holding down [SHIFT])
2-1. When MIDI test starts, following display appears.
1. Memory Test [SHIFT] + [BANK 1]
2. MIDI Test [SHIFT] + [BANK 2]
(Identifying the Program Version)
3. Card Test [SHIFT] + [BANK 3]
4. Pedal Test [SHIFT] + [BANK 4]
5. SW/LED Test [SHIFT] + [BANK 5]
2-2. Make a loop with MIDI cable that connects MIDI IN
6. A/D Test [SHIFT] + [BANK 6]
and MIDI OUT.
7. After Touch Test [SHIFT] + [BANK 7]
Does the LCD display "ok" ?
8. Sound Test [SHIFT] + [BANK 8]
9. DSP Test [SHIFT] + [NUMBER 1]
2-3. When the LCD display "ok", Press [ENTER]. The
10. LCD & Encoder Test [SHIFT] + [NUMBER 2]
system program version will be displayed.
11. Bender Test& Factory Data Set [SHIFT] + [NUMBER 8]
And press the [ENTER] again. You can check the
program version number of the CPU and Preset Data.
• Exiting the each Test item
Press [ENTER] while holding down [EXIT].
The test will be suspended and JX-305 return to basic
test mode display.
NOTE: When LCD displays "Factory Data Set ok ?" in 11.,
the test can not be suspended.
1. Memory Test
1-1. Press [ENTER] in the basic test display. Memory Test
will be started.
The following display will appear.
10

JX-305 Sep. 1998
2-4. Remove the MIDI cable.
Troubleshooting for Card test
Display shows "Disconnect ok", and then next test run
automatically.
Result of Test
No response
Check
Check IC29 (Pin 1 / 2 / 7)
Troubleshooting for MIDI test
Result of Test Check
No response Check Q4
Is signal level of the PEDAL change ?
Display remains "on" Check the condition of connection of
L9-12,R47,48
Protect NG!
Read / Write NG
If the Card is inserted, Voltage of
IC29 Pin 1 becomes high level.
Check R18, IC5
Is the voltage of XCWP Low level?
Check IC30 (Pin 3 / 6)
Is the level of XRE / XWE change
during the test?
3. Card Test
Check IC20, RA16
Is there something wrong with card
When MIDI Test ends normally, Card Test runs
automatically.
(or in the initial display of the test mode, press [BANK 3]
while holding down [SHIFT])
bus ?
Check IC30 (Pin 8) / IC32
Is there something wrong with decoder
Check the IC29 (Pin 3, Write Protect)
Is the voltage of XWP High level?
3-1. When Card test starts, the following display appears.
4. Pedal Test
When Card Test ends normally, Pedal Test runs
automatically.
(or in the initial display of the test mode, press [BANK 4]
while holding down [SHIFT])
3-2. Insert a card with write protected.
Does the LCD display "ok" ?
4-1. When Pedal test starts, the following display appears.
3-3. Remove the card once, and insert the card with not
write protected.
Does the LCD display "ok" ?
NOTE: When you execute card test mode, the data in card
4-2. Connect the Foot Pedals to the Hold Jack and the
will be lost.
Switch Jack.
Use the card for test.
4-3. Step on the HOLD Pedal. And check that "on" have
been displayed.
4-4. Foot off the HOLD Pedal. And check that "off" have
been displayed.
4-5. Step on the SWITCH Pedal. And check that "on" have
been displayed.
4-6. Foot off the SWITCH Pedal. And check that "off" have
been displayed.
11

JX-305 Sep. 1998
Troubleshooting for Pedal test
5-3. If test ends normally, press [ENTER] to start next test.
Result of Test
Check
No response
Check Q4
Is signal level of the PEDAL change ?
Troubleshooting for SW & LED test
Display remains "on"
Check the condition of connection of
L9-12,R47,48
Result of Test
One of the LEDs
Check
Check the condition of connection of
5. SW & LED Test
dose not lit.
Two or more LEDs
LED.
Refer to the circuit diagram, check
When Pedal Test ends normally, SW & LED Test runs
automatically.
(or in the initial display of the test mode, press [BANK 5]
while holding down [SHIFT])
5-1. When SW & LED test starts, the following display
appears.
Are All LEDs turn on ?
do not lit.
One of the SWs
dose not work.
TWO or more SWs
do not work.
LED stays on.
the transistor, buffer (74HC245), or
decoder (74HC138) around the LED
circuitry.
Check the diode and condition of
connection of SW.
Refer to the circuit diagram, check
the decoder and transistor array.
Check the short circuit of signal lines
of LED.
6. AD Test
When SW / LED Test ends normally, AD Test runs
5-2. Press all buttons one by one. Then each button, names
automatically.
of buttons appear on the display, and sounds.
(or in the initial display of the test mode, press [BANK 6]
And buttons that have corresponding LEDs are put out
while holding down [SHIFT].)
its LEDs.
Press the all buttons for turning off the all LEDs.
6-1. Connect the Expression to the Control Jack.
•When you press [PLAY] button, press two times.
When you press [TEMPO & MEASURE], press three
6-2. When AD test starts, the JX-305 into standby mode.
times. And check that the Beat LED turns GREEN
Move each knob, name and value of the knob are
and RED and off in order.
displayed.
Move the all knobs and sliders fully one by one.
Is button name appeared on the display ?
(excluding "VOLUME")
Are all LEDs turn off ?
NOTE: If you press two buttons simultaneously, the LCD
NOTE: If you move the knobs and Bender, Modulation, Ctrl
display error.
Pedal, knobs simultaneously, the LCD display error.
To abort a command, press [BWD] button.
Press on the Control Pedal.
Check that the value changes 0 from 127.
Check the mid value 64 when move Env Depth.
12

JX-305 Sep. 1998
6-3. When test ends, press [ENTER] to start next test.
Troubleshooting for After Touch test
Result of Test
Check
Troubleshooting for AD test
No response
Check Q30
Check the condition of connection
Result of Test
No response
Check
Inspect the signal path of AS0, AS1,
Value does not
reach the 0 or 127
Check the power supply of Q7
Check keyboard
Value does not
for breaks or short circuit.
Check the power supply of the panel
8. Sound Test
reach the 0 or 127
Error result even if
Check the analog switches
(74HC4051:IC2 on PB)
Inspect the capacitor that is attached
to the potentiometer for short circuit
Inspect the signal path of the
When After Touch Test ends normally, SOUND Test runs
automatically.
(or in the initial display of the test mode, press [NUMBER
1(BD)] while holding down [SHIFT]).
move the knob or
slider one by one
potentiometer for short circuit
Check analog switch whether signal
8-1. Rotate the VOLUME knob fully clockwise.
of AN3, AN4 are not corrupted.
8-2. Connect the Monitor to the OUTPUT Jack of the JX-
305, and also connect the Headphone to the PHONES
Jack. In the case of you use one Monitor, be sure to
7. After Touch Test
insert the opened plug into the another channel of the
OUTPUT to obtain the correct wave form.
When AD Test ends normally, After Touch Test runs
Verify the waveform being output by the oscilloscope,
automatically.
and check the sound.
(or in the initial display of the test mode, press [BANK 7]
while holding down [SHIFT])
8-3. When sound test starts, at first sound output from L ch
of MIXOUT and Headphone.
7-1. When After Touch test starts, the following display
Every time press the [ENTER], output channel is
appears.
switched.
At first, JX-305 output sine wave from each jacks, and
next rectangular wave form is output.
start OUTPUT /L sine wave
7-2. Press C7, C4, C2 key firmly one by one.
press [ENTER] OUTPUT /R sine wave
Check that value increase to 127.
: OUTPUT /L rectangular wave
: OUTPUT /R rectangular wave
NOTE: If you press the key and Bender,Modulation,Ctrl
Pedal, knobs simultaneously, the LCD display error.
Change the connection of the monitor to corresponding
jack.
Pitch of the sound is different depends on each jack.
Verify that no undesired sound is heard.
Verify that no undesired waveform or voltage detected.
To abort a command, press [BWD] button.
7-3. When After Touch test ends, "ok" appears on the
display.
7-4. If test ends normally, press [ENTER] to start next test.
13

JX-305 Sep. 1998
8-4. When test ends, press [ENTER] to start next test.
Troubleshooting for LCD & Encoder Test
Result of Test
Check
Troubleshooting for Sound Test
One of the dot is
not lit
Replace the LCD unit.
Result of Test
No sound
Sound is too loud,
soft or distorted
9. DSP Test
Check
Check D/A converter (AK4324;IC24)
Check IC3 on PB, IC23, 25 on MB
Check around filter circuitry distorted
Contrast of the
LCD is not
changed
Contrast of the
LCD is pale, even
if adjust its contrast
maximum level.
Contrast of the
LCD is dark, even
Check R249
Is PWM waveform input to the QFP
side of the R262?
Check DA7
Is there short in the circuit ?
If the above check points are normal,
replace the LCD unit.
When Sound Test ends normally, DSP Test runs
automatically.
(or in the initial display of the test mode, press [NUMBER 1
(BD)] while holding down [SHIFT])
if adjust its contrast
minimum level.
LED dose not
change
Check MAIN BOARD IC31 Pin 91, 92
Is pulse generated ?>Check the
condition of connection of R29, 30,
9-1. When DSP test starts, test runs automatically and 7 part
C96, 97 on the MAIN BOARD
are checked.
11.Bender test & Factory Data set
If test result are OK, "o" appears on the display and if
NG, "x" appears on the display.
When LCD & Encoder Test ends normally, Bender test &
Factory Data set runs automatically.
9-2. If test results is OK, press [ENTER] to start next test.
(or in the initial display of the test mode, press [NUMBER 3
(HH)] while holding down [SHIFT])
Troubleshooting for DSP test
11-1. When Bender test & Factory Data set starts, the
Result of Test
Check
following display appears.
"x" displayed
Check IC33
Bleak or etc
Check IC6
Pin 119-143
11-2. Push the bender lever leftward lightly and then
10.LCD & Encoder Test
gradually return it to the original position.
When DSP Test ends normally, LCD test runs automatically.
11-3. Push the bender lever rightward lightly and then
(or in the initial display of test mode, press [NUMBER 2
gradually return it to the original position.
(HH)] while holding down [SHIFT]).
11-4. Press [REC] button.
The follow display will appear.
10-1. When LCD & Encoder Test starts, all dots of the LCD
will light.
Check that the contrast of the LCD changes by rotating
the encoder clockwise and counter clockwise.
Check that all LEDs (([BANK 1] Å` [NUMBER 8])
turn on.
10-2. When test ends, press [ENTER].
14

JX-305 Sep. 1998
11-5. Are the following values obtained when the bender
Troubleshooting for the AD Test
lever is moved all the way to the left and right ?
Result of Test
No response
Check
Check Q6, 7>Check the condition of
level left center right
value -256 0 256
Value does not
reach the 0 or 127 ,
connection
Check the power supply of Q6, 7
-256 or +256
If the above check points are normal, replace the Bender unit.
NOTE: If you move After Touch , Modulation, Ctrl Pedal,
knobs simultaneously, the LCD display error.
To abort a command, press [BWD] button.
When MIN and MAX displayed, The following
display will appear.
11-6. Set the bender lever to MOD position and then return it
to the original position.
Does the MOD value increase from 0 to 127 ?
11-7. Test ends normally, the following display will appear.
Press [ENTER] button, Factory Data will be loaded.
15

JX-305 Sep. 1998
KEYBOARD PARTS LIST
KEYBOARD DISASSEMBLY
JX-305(SK-861-K) PARTS LIST
No. PARTS No. PARTS NAME
32575349 SK-8 N-KEY CF
32575348 SK-8 N-KEY EB
1 32575350 SK-8 N-KEY D
32575351 SK-8 N-KEY G
32575347 SK-8 N-KEY A
2
3
4
5
6
7
8
9
10
11
32575353 SK-8 N-KEY C'F'
32575355
* * * * * * * *
22815838
SK-8 S-KEY
SK-8 CHASSIS 61P-E ASSY
SK-8 CHASSIS 61P-C
22265529 SK-861 CUSHION 61KEY B
32155199
01236767
SK-8 GUIDE
SK-861 AFTERTOUCH
70890767
70890778
SK-8A61 PWB HI-AFT ASSY
SK-8A61 PWB LOW ASSY
01015134
01015145
22205597
22205598
00018978
SK-8A RUBBER SWITCH 12P
SK-8A RUBBER SWITCH 13P
SK-8 PCB SPACER 12P
SK-8 PCB SPACER 13P
SK-8 STOPPER 12P
00018989 SK-8 STOPPER 13P
40017134
40012256
SK-8 SPRING
00126612 JV-50 KEYBOARD ANGLE
40011067
1. ATTACHING THE PCBs
Required Parts
PARTS No, PARTS NAME Qty.
70890767
70890778
01015134
01015145
22205597
22205598
40012256
1) First, turn the chassis over on the other side, being careful
not to reverse the right and left ends.
Next, as shown in fig. 1, place SPACER 12P (4 pieces)
on the chassis from the left end (the bass side of
keyboard), aligning them with the posisioning holes
provided on the chassis.
(Refer to fig. 2.)
In the same way, place SPACER 13P on the right side of
the chassis (the treble side).
Bass Side
SPACER 12P x4
SK-8A61 PWB HI-AFT ASSY
SK-8A61 PWB LOW ASSY
SK-8A RUBBER SWITCH 12P
SK-8A RUBBER SWITCH 13P
SK-8 PCB SPACER 12P
SK-8 PCB SPACER 13P
BINDING TAPTIGHT B 3x10mm ZC
1
1
4
1
4
1
24
Treable Side
SPACER 13P
1 2 5 7 8 11
fig.1
Positioning Hole of Chassis
3 6 4 9
10
Positioning Holes of Chassis
fig.2
Positioning Holes of Chassis
16

JX-305 Sep. 1998
2) Next, aligning the positioning bosses of RUBBER
SWITCH with the circular holes of SPACER, and as
done for the spacer, place four RUBBER SWITCH 12PL,
and one RUBBER SWITCH 13P in order, starting on the
lower tone side.
In this procedure, make sure that RUBBER SWITCH and
SPACER are positioned with their cutout parts and
ascape grooves aligned, respectively.
(Refer to fig. 3 and fig. 4.)
Cutout Part
4) Then, tighten the LOW and HI PCBs with the Tap Tight
Screws. First tighten the near-center Screws 1, then the
end Screws 2 on the other side. (This order must be
followd. Ohterwise the PCBs may not be flush with the
Spacers.)
Then tighten the remaining Screws 3 of the LOW and HI
PCBs. (For the above, refer to Fig. 7.)
Finally, tighten the Screws in the area adjacent to the
LOW and HI PCBs.
Since the PCBs may have been warped by soldering, etc.,
it is recommended to gently hole down the center and
tighten the Screws.
2
3
1
PCB Adjacent Area
fig.3
Air-Escape Groove
RUBBER SWITCH
fig.7 (ex. 32P LOW)
fig.4
3) Next, using the cutout part of PCB and the projecting part
of SPACER as positioning guide, place PCB so that the
positioning pin of SPACER fits into the positioning hole
of PCB. (Refer to fig. 5)
As fig. 6 shows, PCBs consist of three boards, "LOW"
and "HI".
Posisioning Boss(6 points)
PCB SPACER
Chassis
Positioning Pin of SPACER
2. REMOVAL AND REINSTALLATION OF THE KEYS
Before removing the keys, first take the stopper off the rear
side of the chassis, then take away the spring.
When reinstalling the keys, carefully apply the stopper as
shown in fig. 8.
Bring the stopper into closs contact with the ends of the white
key shafts and press the stopper in the area of the doublecoated
tape to secure it. (Refer fig. 8.)
Double-Coated
Adhesive Tape
Stopper
PCB Cutout Part
fig.5
fig.8
Normal
Key Axis
Sharp Key Axis
Projecting Part of SPACER
Viewed from the rear side of the chassis.
32P LOW
29P HI
32P LOW
29P HI
Bass Side
fig.6
Treble Side
STOPPER 12P x4
fig.9
STOPPER 13P
17

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
BLOCK DIAGRAM/
18

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT BOARD (MAIN)
/
View from foil side.
19

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT BOARD (MAIN)
/
20
View from components side.

JX-305 Sep. 1998
21
CIRCUIT DIAGRAM (DIGITAL)
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
A
A
B
B
C
C
D
D
E
4
3
2
1
XXPCS
XRST
A12
A11
A10
A8
A10
A8
A14
A10
A9
A13
A12
A8
A8
A7
A13
A11
A10
A9
A8
A7
A13
A13
A12
A9
A12
A11
A9
A14
A14
A7
A9
A7
A14
A11
A7
A10
WCS2
XWRD0
WCS0
WA11
WA7
WA10
WA15
WA9
WA16
WA9
EA0
WA7
WCS2
WA4
WA18
EA7
WA21
WA22
WA22
WA10
XWRD0
WA5
WA5
WA17
WA19
WCS3
WA20
WA9
WA6
EA3
WA14
WA16
WCS1
WA12
EA5
WA18
WA10
WA15
WA8
WA13
WA14
EA1
EA8
WA2
WA20
WA12
WCS1
WCS1
WA7
WA14
WA12
WA17
WA8
EWE
WA3
WA13
WA18
ECAS
WA5
WA20
WA3
XWRD0
WA4
EA2
WA3
WA19
WA19
WA13
WA21
WA18
WA2
WCS0
WA7
WA20
WA12
WA16
XPWR
WCS3
WA3
WA15
WA22
WA2
WA5
WA17
WA6
WA8
WA13
WA11
XWRD0
WA1
WA8
WA6
WA6
WA16
WA21
EA6
WA11
WA15
WA1
WA4
WA2
WA10
WA1
WA9
WA17
EA4
WA19
WA14
WA21
WA4
WA1
WA11
A10
A12
A9
A11
A8
A7
A13
XRST
EA0
EA8
EA7
EA6
EA5
EA4
EA3
EA2
EA1
ERAS
WD6
WD11
WD3
WD6
WD8
WD12
WD14
WD14
WD11
WD7
WD1
WD9
WD14
WD10
WD15
WD12
WD13
WD5
WD11
WD7
WD10
WD15
WD8
WD15
WD3
WD3
WD5
WD1
WD13
WD13
WD9
WD7
WD4
WD8
WD8
WD14
WD7
WD5
WD11
WD1
WD12
WD3
WD5
WD10
WD4
WD13
WD9
WD6
WD10
WD6
WD4
WD1
WD15
WD4
WD12
WD9
WD2
WD2
WD2
WD0
WD2
WD0
WD0
WD0
A15
A15
A17
A16
A16
A16
A16
A15
A17
A17
A15
XRE
XWE
CLE
ALE
XCE
XPWR
XEJECT
XCTL
XCCK
ED5
ED3
ED7
ED0
ED4
ED2
ED4
ED7
ED6
ED3
ED6
ED5
ED2
ED0
ED1
ED1
A2
A4
A4
A4
A2
A1
A19
A2
A1
A1
A3
A3
A21
A2
A5
A3
A6
MIN
A2
A5
A5
A18
A5
A6
XCD
A2
A18
A3
XCD
A21
XPWAIT
A6
A19
A21
XPWAIT
A2
A5
A18
A1
A4
A19
A6
A6
A1
A3
A4
A19
A6
A6
A1
A18
A5
A4
XCD
XKEY
A2
A1
A3
A4
XCTL
A1
A5
A3
A21
A18
A19
A17
D13
D9
D10
D10
D7
D5
D5
XCWP
D13
XEJECT
D15
D9
XGAINT
XPTCS
D0
D2
D5
D14
XXPINT
XGACS
D0
D3
D7
D12
D1
D1
D11
D12
D6
DMEN
D9
D13
D1
D7
D2
XXPINT
D3
D3
D3
XGAINT
D11
D9
XCBSY
D4
D7
D8
D8
D5
XXPCS
D2
D11
XKINT
XGACS
XGAINT
D0
XWR
XUPCS
D2
D5
D3
XXPCS
D1
D15
D12
D0
D10
D6
D2
XXPCS
XWR
XKINT
D1
D8
D11
D12
D6
D6
D7
D8
D3
XDWR
D15
D13
D9
XCBSY
D10
D4
D4
XXPINT
D14
XCBSY
XUPCS
D1
D9
D10
D4
XGAWAIT
D2
D3
XGACS
D7
D14
XCWP
D5
D13
D13
D15
D11
D0
D6
XUPCS
XUPCS
D14
D15
XWR
D7
D8
D14
XPTCS
D10
XEJECT
D1
D15
D12
D12
D0
D0
D8
D2
D5
XDWR
XPTCS
XWR
D4
D4
D6
D4
D14
XDACK
D11
XWR
D6
XGAWAIT
D0
D1
D2
D3
D4
D5
D6
D7
CD2
CD7
CD5
CD7
CD6
CD0
CD6
CD0
CD1
CD3
CD5
CD4
CD4
CD3
CD2
CD1
XRST
XWR
XPRG
XPRG
XLCDREQ
XLCDREQ
XDACK
GACLK
D0
D8
D1
D9
D2
D10
D3
D11
D4
D12
D5
D13
D6
D14
D7
D15
XCASL
XRAS
XCASH
XRD
A0
XRD
XRD
A0
XRD
A0
A0
XCASL
XRD
XRD
XCASH
A0
XRAS
XRD
XRD
A0
XWR
XRD
A4
A3
A2
A1
XRAS
XCASL
XDWR
XCASH
A12
A11
A10
A9
A8
A7
A6
A5
A18
A14
A15
A13
A16
A19
A17
A21
WD0
WD1
WD6
WD14
WD9
WD7
WD15
WD8
WD2
WD3
WD4
WD12
WD11
WD5
WD13
WD10
FWP
FWP
XRST
XRST
BCK
WCK
256fs
SD
KEYCK
CONT
CLE
ALE
XCE
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
XWE
XRE
XCBSY
XEJECT
XCWP
DMEN
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
XRD
XKEY
XWR
XKINT
ENCA
AS1
LD4
SSEN
BEATR
LD6
LS1
PD0
LE
PD2
SS0
RS
SS2
PD4
LD1
PD6
LD3
LLCK
ENCB
AS0
LD5
LS0
BEATG
LD7
PD1
LS2
RXW
PD3
SS1
LD0
PD5
LD2
PD7
ANF3
MIN
ANF1
MOUT
ANF5
ANF2
ANF0
ANF4
ANF6
HOLD
PEDAL
D
D
D
D
+5
D
D
D
+ 5
D
D
+ 5
D
+5
D
D
+ 5
D
+5
D
D
D
+5
D +5
D
D
D
+5
D
D
+5
D
+5
D
D
+ 5
D
D
D
D
D
+ 5
D
D
D
D
+5
D
D
D
D
D
+ 5
D +5
D
D
+5
D
+5
D
D
+5
D
+ 5
D
D
+ 5
D
D
D
D
+ 5
D
D
+5
D
+5
D
D
D
D
D
D
+ 5
D +5
D
D
+ 5
D
D
+5
D
D
D
+5
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
+ 5
D
+5
D
+5
D
+5
D
+5
D
+5
D
+5
D
+5
D
+5
D
D
D
D
IC16B
3
5
C61
470p
C1 0.1u
IC30E
74HC32AF
14
7
IC8
UPD23C160000
NC
13
A19
11
A18
14
A17
15
A16
2
A15
3
A14
4
A13
5
A12
6
A11
7
A10
8
A9
9
A8
10
A7
16
A6
17
A5
18
A4
19
A3
20
A2
21
A1
22
A0
23
*/O15
46
O14
44
O13
42
O12
40
O11
35
O10
33
O9
31
O8
29
O7
45
O6
43
O5
41
O4
39
O3
34
O2
32
O1
30
O0
28
W/B
1
CE
24
OE/*
27
IC
12
IC
36
VCC
37
VCC
38
GND
25
GND
26
GND
47
GND
48
R99
NIU
IC11
7S32F
1
2
4
5
3
IC20
74HC245AF
A8
9
A7
8
A6
7
A5
6
A4
5
A3
4
A2
3
A1
2
G
19
DIR
1
B8
11
B7
12
B6
13
B5
14
B4
15
B3
16
B2
17
B1
18
VCC
20
GND
10
C211 0.1u
IC2
TMS417809A-60DZR
A9
28
A8
27
A7
26
A6
25
A5
24
A4
23
A3
20
A2
19
A1
18
A0
17
NC
11
NC
12
NC
15
NC
16
NC
32
RAS
14
UCAS
30
LCAS
31
WE
13
OE
29
I/O16
41
I/O15
40
I/O14
39
I/O13
38
I/O12
36
I/O11
35
I/O10
34
I/O9
33
I/O8
10
I/O7
9
I/O6
8
I/O5
7
I/O4
5
I/O3
4
I/O2
3
I/O1
2
VCC
1
VCC
6
VCC
21
GND
22
GND
37
GND
42
RA3
10kx8
1 2
3
4
5
6
7
8
9
10
RA8
10kx8
1 2
3
4
5
6
7
8
9
10
RA5
10kx8
1 2
3
4
5
6
7
8
9
10
C15
0.1u
IC9
LHMN5KWB
A20
44
A19
43
A18
2
A17
3
A16
34
A15
35
A14
36
A13
37
A12
38
A11
39
A10
40
A9
41
A8
42
A7
4
A6
5
A5
6
A4
7
A3
8
A2
9
A1
10
A0
11
*/D15
31
BYTE
33
CE
12
OE
14
D14
29
D13
27
D12
25
D11
22
D10
20
D9
18
D8
16
D7
30
D6
28
D5
26
D4
24
D3
21
D2
19
D1
17
D0
15
A21
1
VCC
23
VSS
13
VSS
32
IC3
LHMN0PNH
A20
44
A19
43
A18
2
A17
3
A16
34
A15
35
A14
36
A13
37
A12
38
A11
39
A10
40
A9
41
A8
42
A7
4
A6
5
A5
6
A4
7
A3
8
A2
9
A1
10
A0
11
*/D15
31
BYTE
33
CE
12
OE
14
D14
29
D13
27
D12
25
D11
22
D10
20
D9
18
D8
16
D7
30
D6
28
D5
26
D4
24
D3
21
D2
19
D1
17
D0
15
A21
1
VCC
23
VSS
13
VSS
32
R221
NIU
R222
NIU
R228
100
R230
100
C2
0.1u
C18 0.1u
C10 0.1u
C5 0.1u
C12 0.1u
C17 0.1u
C14 0.1u
C21
NIU
R235
NIU
R10
470
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
46
46
47
47
48
48
49
49
50
50
IC16C
7WU04F
6
2
R27
270
IC16A
7WU04F
1
7
C84
15p
X2
24.576MHz
1 4
C85
15p
R26
1M
RA12
10kx8
1
2
3
4
5
6
7
8
9 10
RA14
10kx8
1
2
3
4
5
6
7
8
9 10
IC30A
74HC32AF
1
2
3
IC30B
74HC32AF
4
5
6
C88 0.1u
C16
0.1u
IC33
LH62800K-50
VSS
1
I/O1
2
I/O2
3
I/O3
4
I/O4
5
WE
6
RAS
8
A0
9
A1
10
A2
11
A3
12
VCC
13
A4
14
A5
15
A6
16
A7
17
A8
18
OE
19
CAS
21
I/O5
22
I/O6
23
I/O7
24
I/O8
25
VSS
26
IC16D
7WU04F
8
4
IC32
74HC175F
D4
13
D3
12
D2
5
D1
4
CLR
1
CK
9
4Q
15
3Q
10
2Q
7
1Q
2
4Q
14
3Q
11
2Q
6
1Q
3
VCC
16
GND
8
IC34
7S04F
2 4
5
3
IC30C
74HC32AF
9
10
8
IC30D
12
13
11
R236
0
R234
470
R232
10k
C54
100p
R11
220
C11 0.1u
C4 0.1u
RA7
10x4
1 8
2 7
3 6
4 5
RA10
10x4
1 8
2 7
3 6
4 5
RA9
10x4
1 8
2 7
3 6
4 5
C9 0.1u
RA25
10x4
1 8
2 7
3 6
4 5
R68
2.7k
C13 0.1u
R25
470
R12
3.3k
RA6
10x4
1 8
2 7
3 6
4 5
R6 10
R14
10k
R15
10k
L20
0
RA16
10kx8
1 2
3
4
5
6
7
8
9
10
R19
270
X1
7.056MHz
1
4
R103
470
C233
0.1u
C229
NIU
RA17
10kx4
1
8
2
7
3
6
4
5
RA18
10kx4
1
8
2
7
3
6
4
5
RA19
10kx4
1
8
2
7
3
6
4
5
RA22
10kx4
1
8
2
7
3
6
4
5
C256
15p
L23
N1608Z 601
L22
N1608Z
601
IC5
HD6437042AF28
MD3
73
MD2
75
MD1
78
MD0
79
RXD1/PA3
48
TXD1/PA4
47
RXD0/PA0
51
TXD0/PA1
50
PE13/TIOC4B/*
112
PE12/TIOC4A
111
PE11/TIOC3D
110
PE10/TIOC3C
108
PE9/TIOC3B
107
PE8/TIOC3A
106
PE7/TIOC2B
105
PE6/TIOC2A
104
PE5/TIOC1B
102
PE4/TIOC1A
89
*/PE3/DRAK1
88
*/PE1/DRAK0
86
AN7/PF7
99
AN6/PF6
98
AN5/PF5
96
AN4/PF4
95
AN3/PF3
94
AN2/PF2
93
AN1/PF1
92
AN0/PF0
91
AVCC
100
AVSS
97
PLLVCC
80
PLLVSS
82
PLLCAP
81
EXTAL
74
XTAL
72
CK/PA15
83
NMI
76
*/IRQ7/A21
32
*/WAIT/IRQ6/A20
31
*/BREQ/IRQ5/A19
30
*/BACK/IRQ4/A18
29
PB1/A17
22
PB0/A16
20
PC15/A15
19
PC14/A14
18
PC13/A13
17
PC12/A12
16
PC11/A11
15
PC10/A10
14
PC9/A9
13
PC8/A8
12
PC7/A7
11
PC6/A6
10
PC5/A5
9
PC4/A4
8
PC3/A3
7
PC2/A2
6
PC1/A1
5
PC0/A0
4
PD15/D15
52
PD14/D14
53
PD13/D13
54
PD12/D12
56
PD11/D11
57
PD10/D10
58
PD9/D9
59
PD8/D8
60
PD7/D7
62
PD6/D6
63
PD5/D5
64
PD4/D4
66
PD3/D3
67
PD2/D2
68
PD1/D1
69
PD0/D0
70
*/PA7/CS3
44
*/PA6/CS2
45
PA11/CS1
40
PA10/CS0
41
PA14/RD
34
PA13/WRH
36
PA12/WRL
38
*/POE0/RAS
24
*/POE2/CASH
26
*/POE1/CASL
25
*/POE3/RDWR
28
WDTOVF
35
*/PA9/IRQ3
42
*/PA8/IRQ2
43
*/SCK1/IRQ1
46
*/SCK0/IRQ0
49
*/PE2/DREQ1
87
*/PE0/DREQ0
85
*/IRQOUT/DACK1
2
*/AH/DACK0
1
RES/VPP
84
VCC
21
VCC
37
VCC
65
VCC
77
VCC
103
VSS
3
VSS
101
VSS
109
VSS
23
VSS
27
VSS
33
VSS
39
VSS
55
VSS
61
VSS
71
VSS
90
C86
NIU
C46 0.1u
C57
0.1u
C232
0.1u
C213 0.1u
C216
0.1u
C98 0.1u
C22 0.1u
IC6
RA01-005
VDD
20
VDD
40
VDD
60
VDD
80
VDD
100
VDD
120
VDD
140
VDD
160
VSS
1
VSS
10
VSS
30
VSS
41
VSS
50
VSS
59
VSS
70
VSS
81
VSS
90
VSS
110
VSS
121
VSS
130
VSS
139
VSS
150
CA11
19
CA10
17
CA9
18
CA8
21
CA7
23
CA6
25
CA5
26
CA4
27
CA3
28
CA2
29
CA1
31
CA0
32
CD12
47
CD11
51
CD10
46
CD9
42
CD8
36
CD7
35
CD6
39
CD5
45
CD4
49
CD3
48
CD2
44
CD1
38
CD0
34
CS
53
DS(RD)
16
EA8
133
EA7
135
EA6
137
EA5
141
EA4
143
EA3
142
EA2
138
EA1
136
EA0
134
WA23
61
WA22
62
WA21
64
WA20
63
WA19
65
WA18
66
WA17
87
WA16
84
WA15
82
WA14
78
WA13
76
WA12
74
WA11
72
WA10
69
WA9
67
WA8
68
WA7
71
WA6
73
WA5
75
WA4
77
WA3
79
WA2
83
WA1
86
WA0
85
WD14
95
WD13
99
WD12
104
WD11
107
WD10
103
WD9
98
WD8
94
WD7
93
WD6
97
WD5
102
WD4
106
WD3
105
WD2
101
WD1
96
WD0
92
WCS5
114
WCS4
113
WCS3
112
WCS2
111
WCS1
109
WCS0
108
CA13
24
CA12
22
CD15
33
CD14
37
CD13
43
WREQ
117
WACK
118
WD15
91
WCS7
116
WCS6
115
WOE1
88
WOE0
89
OUTP2
11
OUTP1
9
OUTP0
12
WCKC
8
BCKC
7
SDOD
6
SDOC
5
WCKB
4
BCKB
3
SDIB
2
SDOB
159
WCKA
158
BCKA
157
SDIA5
151
SDIA4
152
SDIA3
153
SDIA2
154
SDIA1
155
SDIA0
156
SDOA5
144
SDOA4
145
SDOA3
146
SDOA2
147
SDOA1
148
SDOA0
149
AS
55
RW(WR)
15
WAIT
52
INT
56
CK
58
RESET
54
ED7
119
ED6
122
ED5
123
ED4
124
ED3
125
ED2
126
ED1
127
RAS
131
CAS
132
EWE
129
SYO
13
SYI
14
TEST
57
ED0
128
C113
100p
C231
NIU
C65
22p
C230
1000p
C73
0.1u
C66
22p
R69
10k
C257
15p
R233
NIU
R105 10k
RA15
10kx8
1
2
3
4
5
6
7
8
9 10
R104 10k
L24 N1608Z 601
L25 N1608Z 601
L26
N1608Z 601
IC1
LH28F800SUT-70
A19
5
A18
6
A17
7
A16
8
A15
10
A14
11
A13
12
A12
13
A11
17
A10
18
A9
19
A8
20
A7
22
A6
23
A5
24
A4
25
A3
26
A2
27
A1
28
A0
32
RY/BY
53
CE1
2
CE0
14
WE
55
OE
54
WP
56
BYTE
31
RP
16
3/5
1
DQ15
52
DQ14
50
DQ13
47
DQ12
45
DQ11
41
DQ10
39
DQ9
36
DQ8
34
DQ7
51
DQ6
49
DQ5
46
DQ4
44
DQ3
40
DQ2
38
DQ1
35
DQ0
33
NC
3
NC
4
NC
29
NC
30
VPP
15
VCC
9
VCC
37
VCC
43
VSS
21
VSS
42
VSS
48
C24 0.1u
C77
0.1u
C212 0.1u
C83 0.1u
C48 0.1u
C222
0.1u
IC7
LH28F800SUT-70
A19
5
A18
6
A17
7
A16
8
A15
10
A14
11
A13
12
A12
13
A11
17
A10
18
A9
19
A8
20
A7
22
A6
23
A5
24
A4
25
A3
26
A2
27
A1
28
A0
32
RY/BY
53
CE1
2
CE0
14
WE
55
OE
54
WP
56
BYTE
31
RP
16
3/5
1
DQ15
52
DQ14
50
DQ13
47
DQ12
45
DQ11
41
DQ10
39
DQ9
36
DQ8
34
DQ7
51
DQ6
49
DQ5
46
DQ4
44
DQ3
40
DQ2
38
DQ1
35
DQ0
33
NC
3
NC
4
NC
29
NC
30
VPP
15
VCC
9
VCC
37
VCC
43
VSS
21
VSS
42
VSS
48
C218
0.1u
C224
0.1u
C107
0.1u
C226
0.1u
C225
0.1u
C223
0.1u
IC31
TC160G22AF-1253
NC
1
VDD
2
VSS
3
MIDIIN
4
PWM2
5
D0
6
D1
7
D2
8
D3
9
VDD
10
D4
11
D5
12
D6
13
D7
14
VSS
15
CS0
16
CS1
17
VDD
18
CS2
19
VSS
20
A21
21
A19
22
A18
23
VDD
24
A6
25
A5
26
A4
27
A3
28
VSS
29
A2
30
A1
31
A0
32
VSS
33
VDD
34
NC
35
NC
36
NC
37
NC
38
VSS
39
CLKOUT
40
VSS
41
XRESET
42
XLCDREQ
43
VSS
44
XDACK
45
XRD
46
XWR
47
XIREQ
48
WAITOUT
49
VSS
50
ECS0
51
ECS1
52
ECS2
53
ECS3
54
VSS
55
ECS4
56
ECS5
57
ECS6
58
ECS7
59
VDD
60
ECS8
61
ECS9
62
ECS10
63
VSS
64
ECS11
65
ECS12
66
ECS13
67
ECS14
68
PWM1
69
VSS
70
VDD
71
NC
72
NC
73
VDD
74
VSS
75
EXINT0
76
EXINT1
77
EXINT2
78
EXINT3
79
EXINT4
80
VSS
81
P0
82
P1
83
P2
84
P3
85
P4
86
P5
87
P6
88
P7
89
VDD
90
ENCA
91
ENCB
92
DC TEST
93
VSS
94
SS0
95
SS1
96
SS2
97
SS3
98
SSEN
99
LS0
100
LS1
101
LS2
102
LS3
103
VSS
104
LLCK
105
VDD
106
VSS
107
NC
108
NC
109
VSS
110 VSS
111
PD0
112
PD1
113
PD2
114
PD3
115
VSS
116
PD4
117
PD5
118
PD6
119
PD7
120
VDD
121
EXWAIT0
122
EXWAIT1
123
EXWAIT2
124
TEST
125
RS
126
RXW 127
LE
128
VSS
129
LD0
130
LD1
131
LD2
132
LD3
133
LD4
134
LD5
135
VSS
136
LD6
137
LD7
138
VDD
139
VSS
140
CLKIN
141
VSS
142
VDD
143
NC
144
C221
0.1u
C210 0.1u
C44 0.1u
C209 0.1u
C228
0.1u
C89
0.1u
C227
0.1u
C25
0.1u
C217
0.1u
C40
0.1u
C220
0.1u
C219
0.1u
C38 0.1u
C20 0.1u
C19
10/16
L19
N1608Z
A331
L29
N1608ZA601
L30
N1608ZA601
L31
N1608Z601
C79
4.7/6.3
C43
0.1u
R2
10k
C32
100p
R102
470
C112
100p
R3
NIU
C269
NIU
/

A
1
JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT BOARD (SND_PWR) /
SD
WCK
BCK
-
DMEN
256fs
+
+ A 9
8
4
C146
0.1u
C163
4.7/6.3
A
C177
0.1u
IC25C
UPC4570G
A +5
L27
N1608Z A121
D
12
11
15
14
13
D
A
7
8
6
5
9
10
4
3
DEM1
DEM0
DIF2
DIF1
DIF0
SDATA
LRCK
BICK
PD
SMUTE
DFS
MCLK
CKS
-
+
+ A 9
8
4
2
DVDD
1
DVSS
D
A
A +5
22
AVDD
20
AVSS
DC IN
C154
10/16
IC23C
M5216AFP
C157
4.7/6.3
JK8
0
A
C178
0.1u
A
HEC2305-01-250
A
C99
24
10/16 C100
DZFL
10/16
19
AOUTL+
18
AOUTL-
17
AOUTR+
16
AOUTR-
23
C101
DZFR A +5 10/16 C102
21
10/16
VREF
IC24
AK4324
C7
2
1
3
C166
1u
A
D4
SPFB 54
1 2
C189
NIU
R57 15k
R60 15k
R78
R81
FL1
DSS310
223
F
+
+
15k
15k
C190
NIU
R64 56k
R251 39k
R61 12k
C150
1200p(Film)
R201 15k
R70
10k
R85
R250
R82
56k
12k
C171
1200p(Film)
R202 15k
R88
10k
for SW
CN9
W-1
1
1
39k
CN10
W-2
1
1
2C191
2200/16
R300
0
R253
NIU
2
3
6
5
-
+
-
+
A MUTE
F
C144
220p(Film)
C127
180p(Film)
R252
NIU
C255
0.047u( Film)
1
IC25A
UPC4570G
C254
0.047u( Film)
C132
180p(Film)
C168
220p(Film)
7
IC25B
UPC4570G
R7
0
6
C192
NIU
IC27
SI-8501L
VIN
+ A 9
AV-CENTER
SS
3
D3
1 2
C195
NIU
R4
0
RD4.7S
R5
0
C143
0.1u
C148
100/16
3
GND
2 1
4
D
+
LIN
CN8
52147-1010
10
A
C155
10/16
C175
10/16
A
VO
C193
0.1u
R RTN
1
L RTN
DA3
1SS302
Q11
2SA1576A
C182
220/16
3 2
PANEL
BOARD
A
9 10
8 9
7 8
6 7
5 6
4 5
3 4
2 3
1 2
1
+5 D
L SEND
R SEND
R90
47k
1
R92
100k
R95
47k
R301
0
C194
1000/16
F
3
R98
1k
1
C205
10/16
C206
10/16
A
2
A
A
R226
100k
R1
47k
Q13
2SC3265Y
C196
220/16
C170
10/16
C149
10/16
R225
100k
A
A MUTE
A
C197
0.1u
R93
470
C181
4.7/50
+ A 9
22
R76
4.7k
R80
1k
R55
4.7k
R59
1k
2 3
C185
100/16
6
5
A MUTE
A MUTE
R66
1.5k
1
Q8
DTC314
2
3
R86
1.5k
1
Q9
DTC314
2
3
2
3
R94
10k
1
Q12
2SC4081
1 2
C162
220p
-
+ IC23B
M5216AFP
C142
220p
R20
1.8k
D2
RD4.7S
R77
10k
7
R56
10k
-
1
+ IC23A
M5216AFP
A
A
+5 D
3 2
C145
220/16
A MUTE
A MUTE
R96
22k
D
VA-CENTER
C158
0.1u
+
R63
100k
C169
220/16
R84
100k
1
Q10
DTA144W
R58
47(1/10W)
DMEN
1
C159
220/16
C186
0.1u
R67
470
C160
100p
F
R79
47(1/10W)
1
R87
470
C180
100p
3
F
2
3
2
3
A
A
IC28
78L05F
IN
Q21
DTC314
Q22
DTC314
2
C90 0
F
COM
C87 0
OUT
1
R203
47(1/10W)
C153
100p
F
R204
47(1/10W)
C172
100p
F
C187
0.1u
C183
0.1u
D +5
7
A +5
C173
NIU
A
4
D
C188
10/16
A
VCC
GND
+5 D
6
RST
R91
1k
IC26
M51953BFP
L15 0
L16 0
C262 0.1u
F
NC
NC
NC
NC
DLY
L17 0
C261 0.1u
L18 0
C260 0.1u
1
2
3
8
5
XRST
C184
1u
A
2
4
3
1
XRST
D
JK5
LGR4609-7000
2 JK6
4
3
1
LGR4609-7000
2 JK7
4
3
1
LGR4609-7000
C80 0
C36 0
D
F
F
PHONES
LINE L
LINE R
TER3
M1698
1
4
2 3
TER2
M1698
1
4
2 3
F
TER1
M1698
1
4
2 3
to FG

JX-305 Sep. 1998
23
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT DIAGRAM (INTERFACE)
EXPRESSION
HOLD
BENDER
FOOT SW
SMART
MEDIA
PANEL
BOARD
A
PANEL
BOARD
B
KEYSCAN CHIP
XCEX
XRST
XWP
PR1
PR3
SC0
SC2
PR3
PR3
PR0
SC3
PR1
SC2
PR2
SC3
SC3
PR2
SC2
SC0
SC0
PR1
SC1
PR0
SC1
PR0
SC1
PR2
B G
B R
LSC6
LSC5
LSC4
LSC3
LSC2
LSC1
LSC0
AS0
AS1
AN4
AN3
AN5
LLCK
LSC1
SSC2
LSC2
LSC0
SSC0
SSC1
LSD4
LSD2
LSD1
LSD0
ECA
LSD3
LSC4
B R
LSD5
LSC5
LSD6
SSC4
SSC6
SSC3
SSC7
LLCK
LSC6
SSC5
ECB
B G
LSD7
LSC3
LSD0
LSD1
LSD2
LSD3
LSD4
LSD5
LSD6
LSD7
PR7
SC7
SC4
PR4
SC5
PR4
PR7
SC6
PR6
SC6
PR7
SC6
PR5
PR4
SC7
SC4
PR5
SC5
SC4
SC5
PR5
SC7
PR6
PR6
PR1
SC2
PR3
PR0
PR2
SC1
SC0
SC3
LCD6
LCDRS
LCDRXW
LCDLE
LCD3
LCD4
LCD7
LCD0
LCD5
LCD2
LCD1
SSC7
SSC6
SSC5
SSC4
SSC1
SSC2
SSC3
SSC0
LSD6
LSD2
LSD1
LSD0
LSD5
LSD4
LSD3
LSD7
PR4
SC4
PR7
PR6
SC5
PR5
SC6
SC7
T0
T0
T2
T1
T0
T4
T2
T1
T2
T5
T0
T7
T1
T0
T2
T1
T6
T7
T3
T3
T5
T4
T4
T6
T3
T6
T6
T4
T4
T3
T1
T5
T5
T7
T2
T6
T7
T5
T7
T3
MOD
HOLD
MOUT
MIN
PEDAL
ANF5
ANF4
KEYCK
DMEN
XRST
LS1
SS0
SS1
SS2
SSEN
PD7
PD6
PD5
PD4
PD2
PD3
PD1
PD0
BEATR
BEATG
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
XRD
XWR
XKEY
ENCA
ENCB
RS
RXW
LD6
LD7
LD5
LE
CONT
CD7
CD6
CD5
CD4
CD3
CD2
CD1
CD0
XWE
ALE
CLE
XCE
XRE
XEJECT
XCWP
XCBSY
XKINT
AS1
AS0
ANF0
ANF2
ANF1
LLCK
LS0
LS2
LD0
LD3
LD1
LD4
LD2
ANF6
ANF3
+5
D
D
+ 5
D
+5
D
+ 5
D
D
D
D
D
+5
D
F
F
F
F
D
+5
D
+5
D
+5
D
D
+ 5
D
D
D
+5
D
+5
D
D
+5
D
+5
D
D
D
F
F
F
D
D
+5
D
D
D
+5
D
D
D
+5
D
D
D
+ 5
D +5
D
D
+5
D
+ 5
D
D
D
D
D
+ 5
D + 5
D
D
D
D
D
+5
D
D
D
D
+ 5
D
D
D
+ 5
D +5
D
D
D
D
F
D
+5
D
+5
D
+5
D
+5
D
+5
D
+5
D
+ 5
D +5
D
+5
D
+5
D
D
D
D
+
A 9
+5
D
D
+5
D
D
D
D
D
D
D
D
R39 100
R47
1k
R49
47k
IC19B
74LS05FP
3 4
IC19C
74LS05FP
5 6
IC19F
74LS05FP
13 12
IC19E
74LS05FP
11 10
IC18
PC410
6
4
1
3
5
IC19G
74LS05FP
14
7
C93
0.1u
C137
0.1u
C125
1000p
C123
1000p
R38
3.3k
R48
1k
R35
220
R36
220
R37
220
DA2
1SS302
2 1
3
R42
10k
C126
0.1u
R46
47k
DA1
1SS302
2 1
3
R32 120
L1
N1608Z 601
L2
L3
0
L4L5
L6
0
L7L8
L9
N1608Z 601
L10
N1608Z 601
L11
N1608Z 601
L12
EXC3B B102
Q3
DTA114E
1
3
2
Q5
DTC114E
1
2 3
Q2
2SA1576A
1
3 2
R50
1k
Q6
2SC4081
1
2 3
C139
0.1u
C122
0.1u
Q4
2SC4081
1
2 3
R223
100k
JK2
LGR4609-7000
1
2
3
4
JK4
LGR4609-7000
1
2
3
4
JK3
LGR4609-7000
1
2
3
4
R45 1k
R227
100
CN7
IL-S-6P-S2L2-EF
1
1
2
2
3
3
4
4
5
5
6
6
C138
0.1u
IC19D
9 8
DA8
1SS302
2
1
3
C110
10/16
L14
N1608Z 601
R18 10k
C103
0.1u
R43
100k
C104 10/16
R29
10k
C97
101p
C96
101p
R30
10k
CN6
IL-FPC-26SL-N
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
C39
15p
C64
15p
C42
15p
C55
15p
C29
15p
C30
15p
C23
10/16
CN2
IL-FPC-16SL-N
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
C47
15p
C58
15p
C33
15p
C27
15p
C50
15p
C60
15p
C8
0.1u
C35
15p
R9
470
Q1
2SA1576A
1
3 2
R22
100k
C62
0.1u
R21
1.8k
DA7
1SS302
2
1
3
C63
10/16
CN11
CN015S-3013-0
VSS
1
CLE
2
ALE
3
WE
4
WP
5
I/O1
6
I/O2
7
I/O3
8
I/O4
9
VSS
10
VSS
11
VCC
12
I/O5
13
I/O6
14
I/O7
15
I/O8
16
NC
17
GND
18
R/B
19
RE
20
CE
21
VCC
22
SENS1
30
SENS2
40
SW1
50
SW2
60
C238
0.1u
Q14
DTA114E
1
3 2
R100
1k
R101
820
C130
100p
Q15
DTA114E
1
3 2
C129
100p
Q23
RN1421 1
2 3
Q25
RN1421 1
2 3
Q26
RN1421 1
2 3
Q27
RN1421 1
2 3
Q28
RN1421 1
2 3
Q29
RN1421
1
2 3
Q24
RN1421
1
2 3
R249
1k
IC29A
7W08F
1
2
7
IC29B
7W08F
5
6
3
IC19A
74LS05FP
1 2
R240
470
C236
0.01u
R241
470
C237
0.01u
C128
100p
CN5
IL-FPC-26SL-N
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
DA4
1SS302
2 1
3
DA6
1SS302
2 1
3
DA5
1SS302
2 1
3
C234
0.01u
C239
0.01u
C240
0.01u
R245
470
R242
470
R238
470
IC29C
7W08F
8
4
C28
100p
R304
10k
RA4
10kx8
1 2
3
4
5
6
7
8
9
10
R248
100k
R33
10k
RA2
10kx8
1
2
3
4
5
6
7
8
9 10
RA1
10kx8
1
2
3
4
5
6
7
8
9 10
R31
1k
C68 NIU
C70 NIU
C72 NIU
C78 NIU
C75 NIU
C67 NIU
RA24
100x4
1
8
2
7
3
6
4
5
RA21
100x4
1
8
2
7
3
6
4
5
C243
15p
RA20
100x4
1
8
2
7
3
6
4
5
C244
15p
C246
15p
C248
15p
C250
15p
C252
15p
C253
15p
L21
N1608Z 601
C258
15p
RA29
10x4
1
8
2
7
3
6
4
5
RA28
10x4
1
8
2
7
3
6
4
5
RA27
10x4
1
8
2
7
3
6
4
5
RA26
10x4
1
8
2
7
3
6
4
5
RA23
3.3kx8
1
2
3
4
5
6
7
8
9 10
C131
100p
C95
NIU
JK1
YKF51-5041
IN
2
4 5
2 5
4 4 2 5
OUT
THRU
12
14
15
19
10
22
24
25
29
20
32
34
35
39
30
40
50
60
70
R34
220
CN4
52806-1410
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
C94 0.1u CN1 IL-FPC-18SL-N
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
C3
0.1u
C109
0.1u
C242
0.1u
C106
0.1u
C108
0.1u
R16
1k
L13
N1608Z 601
R40
10k
R41
10k
IC37B
BA10358F
+
-
6
5
7
R311
1k
R315
100k
R312
100 R313
27k
C265
0.1u
R310
220k
R314
10k
R317
12k
Q30
2SC4081
1
2 3
R318
2.2k
IC37C
BA10358F
+
-
8
4
C268
0.1u
R316
470
R54
470
R53
2.2k
Q7
2SC4081
1
2 3
C235
0.01u
C264
100p
R306
47k
R307
2.2k
C263
1u
R309
10
C26
0.1u
C59
15p
C6 0.1u
C251
15p
C134
100p
C135
100p
C45
15p
C245
15p
R52
2.2k
C81
0.1u
C52
15p
C31
15p
C56
15p
C259
15p
C51
15p
C71 NIU
IC36
74HC238F
C
3
B
2
A
1
G2B
5
G2A
4
G1
6
Y7
7
Y6
9
Y5
10
Y4
11
Y3
12
Y2
13
Y1
14
Y0
15
VCC
16
GND
8
IC35
74HC238F
C
3
B
2
A
1
G2B
5
G2A
4
G1
6
Y7
7
Y6
9
Y5
10
Y4
11
Y3
12
Y2
13
Y1
14
Y0
15
VCC
16
GND
8
C49
15p
C69 NIU
R305
1.2k
C41
15p
R44
2.2k
C105 0.1u
C133
100p
C82
10/16
C76 NIU
C111 0.1u
C74 NIU
C136
100p
C37
15p
C53
15p
C249
15p
C247
15p
C34
15p
C241 NIU
C267
0.01u
C266
1u
IC4
SSC1080
VDD
7
VDD
33
VSS
20
VSS
46
SC10
24
PR10
23
SC9
22
PR9
21
SC8
19
PR8
18
SC7
17
PR7
16
SC6
15
PR6
14
SC5
13
PR5
12
SC4
11
PR4
10
SC3
9
PR3
8
SC2
6
PR2
5
SC1
4
PR1
3
SC0
2
PR0
1
T7
31
T6
30
T5
29
T4
28
T3
27
T2
26
T1
25
T0
32
CLK
49
A1
48
A0
47
D7
44
D6
43
D5
42
D4
41
D3
40
D2
39
D1
38
D0
37
INT
34
RD
36
WR
35
CS
45
RESET
50
TEST1
51
TEST2
52
RA11
10x4
1 8
2 7
3 6
4 5
RA13
10x4
1 8
2 7
3 6
4 5
R308
47k
R239
10k
IC37A
BA10358F
+
-
2
3
1
/

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT BOARD (PANEL A)
/
24
View from components side.

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT DIAGRAM (PANEL A) /
25

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT BOARD (PANEL B)
/
26
View from components side.

JX-305 Sep. 1998
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT DIAGRAM (PANELB) /
27