1 - Al Kossow's Bitsavers

More documents

Recommendations

Info

PRINCIPLES OF OPERATION HEV.A Description of circuit The voltage stabilization circuit of the +5V supply circuit utilizes above three elements. The vicinity of fixed voltage is applied to the voltage of +5V line increases, current flows in 8th-pin terminal voltage of the HA16654 increases. reference terminal. As the Z4 increases, and then the Then a pulse width of the the secondary oscillation output terminal is reduced and a output voltage of circuit decreases. If the voltage of +5V line decrease, the voltage of the error input terminal of the HA16654 decreases and a pulse width of the output terminal widen. Therefore the output voltage of the secondary oscillation circuit increases. If the voltage of the stable +5 volts line is lower than +5 volts, enlarge the resistor value of volume RVl. Then the terminal voltage of R32 decreases and the current flowing in Z4 decreases. The voltage of the ERROR INPUT terminal of the HA16654 decreases and it causes the pulse width of the output terminal to widen and the +5V line voltage to increase. When a voltage of the stable +5 volts line is higher than +5 volts, let dO\m the resistor value of the volumn RVI because of the same reason as above. * The base resistor of the photo coupler is for gaining the switching speed. c) Overcurrent Prevention Circuit Function of the overcurrent prevention circuit is same as +12V supply circuit. d) Overvoltage Prevention Circuit + 5 Vline R28 08 FIGURE 2-2-19. OVERVOLTAGE PREVENTION CIRCUIT 2-12
RKV.A PRINCIPLES OF OPERATION 2.2.2.4 Overheating Prevention Circuit When the temperature rises to a fixed level, switch TH2 is turned on. With switch TH2 turned on switch TH2, a comparator generates a high level signal and it results in no pulse output of the output terminal of the HA166654. +5V ~""---GND 7.5K GND 82 I TH2 15Kfi -12V FIGURE 2-2-20. OVERHEATING PREVENTION CIRCUIT 2.2.2.5 Power Good Signal Generation Circuit The pOvler good signal generation circuit monitors the +5V line, +12V line, 12V line and -5V line of the secondary oscillation circuit. If there is an abnormality (low voltage) in these lines, the power good signal changes to low level signal. <strong>Al</strong>so, it monitors a primary voltage proportion circuit. If there is an abnormality (low voltage) in the input AC adapter, power good signal changes to low level signal. The primary voltage proportion circuit is equipped with the CR circuit. The CR circuit controls timing of the power good signal. 2-13
Page 1 and 2: EPSON pe AX TECHNICAL MANUAL Seiko
Page 3 and 4: PRECAUTIONS Precautlonary notations
Page 5: PREFACE Thls manual descrlbes the t
Page 9: CHAPTER 1 PRODOCT DESCRIPTION TAßL
Page 12 and 13: PRODUCT DESCRIPTION REV.A WX Clock
Page 14 and 15: PRODUCT DESCRlP TION REV.A 1.2.1 Ma
Page 16 and 17: PRODUCT DFßCRIPTION REV.A 1.2.5 D5
Page 18 and 19: PRODUCT DESCRlPTION HEV.A 1.3 HARDW
Page 20 and 21: PRODUCT DESCRIPTION HEV.A TABU 1-3-
Page 22 and 23: PRODUCT DESCRIPTION REV.A FIGURE 1-
Page 24 and 25: 2.3.9 2.3.10 2.3.10.1 2.3.11 2.3.12
Page 26 and 27: 2-3-14 2-3-15 2-3-16 2-3-17 2-3-18
Page 29 and 30: REV.A PRINCIPLES OF OPERATION 2.1 H
Page 31 and 32: REV .A PRINCIPLES OF OPERATION 1 D1
Page 33 and 34: REV.A PRINCIPLES OF OPERATION 1) If
Page 35 and 36: REV . B PRINCIPLES OF OPERATION 2.2
Page 37 and 38: REV.A PRINCIPLES OF OPERATION A vol
Page 39: HEV.A PRINCIPLES OF OPERATION Chara
Page 43 and 44: REV.B PRINCIPLES OF OPERATION +12 +
Page 45 and 46: REV.A PRINCIPLES OF OPERATION TABLE
Page 47 and 48: N I I-' \Q 2 .3 ARTA MAHl CONTROL B
Page 49 and 50: N I N """ 2.3.1 System Clock Genera
Page 51 and 52: N I N W 2.3.1.4 Oscillator There ar
Page 53 and 54: N 2.3.2 System Reset Signal Generat
Page 55 and 56: N +5·5 ~Hls~ CN3~--·"'-" (j flJ5:
Page 57 and 58: t-,) I t-,) ID 2.3.3.3 Jumper Conne
Page 59 and 60: N ( OA TA BUS C~ TO FRO"" RA"" RA""
Page 61 and 62: N I ~ ~ 2.3.4.2 Circuit Operation o
Page 63 and 64: N I ~ To int......l ....ry GAATCK _
Page 65 and 66: MOlS l :;1 MOl l@j { i~~~TRI l READ
Page 67 and 68: N I wIQ - 1. . . I :>
Page 69 and 70: !',) I oll J-I 2.3.5 "C 1/0 Devic
Page 71 and 72: N },. w The LS612 has sixteen 12-bi
Page 73 and 74: N I ~ GAATCK 10 GAATM21 I ino OMA 1
Page 75 and 76: N I 01> -..I GAATCK { CPU GAATM' @
Page 77 and 78: N I ~ (16-bit bus operation) * NOTE
Page 79 and 80: N I \Jl ~ 2.3.8 Command Delay Signa
Page 81 and 82: INT , \ DTR 00 DEN ) t +,5 INT..H C
Page 83 and 84: N I VI \oll lOG......T... ' TOGur..
Page 85 and 86: N I VI GAATCK GAATAB GAATRF l5590 a
Page 87 and 88: N I VI \Cl - _.... -- - ~ AATRF GAA
Page 89 and 90: N ~,... 2.3.14 Keyboard Interface C
Page 91 and 92:
N ~ IJ,) KID CLK KID DATA GAATCK GA
Page 93 and 94:
REV.A PRINCIPLES OF OPERATION 2.4 M
Page 95 and 96:
HEV.A PRINCIPLES OF OPERATION Data
Page 97 and 98:
REV.A PRINCIPLES OF OPERATION 1.2 M
Page 99 and 100:
REV.A PRINCIPLES OF OPERATION 2.4.3
Page 101 and 102:
REV.B PRINCIPLES OF OPERATION VFO c
Page 103 and 104:
REV.A PRINCIPLES OF OPERATION If DS
Page 105 and 106:
REV .A PRINCIPLES OF OPERATION 2.5
Page 107 and 108:
REV.A PRINCIPLES OF OPERATION 2.5.2
Page 109 and 110:
REV .A PRINCIPLES OF OPERATION T6 ~
Page 111 and 112:
REV .A PRINCIPLES OF OPERATION 2.5.
Page 113 and 114:
REV.A PRINCIPLES OF OPERATION (4) I
Page 115 and 116:
HEV.A PRINCIPLES OF OPERATION 2.5.7
Page 117 and 118:
REV.A PRINCIPLES OF OPERATION ii) E
Page 119 and 120:
REV.A PRINCIPLES OF OPERATION Key C
Page 121 and 122:
REV.A PRINCIPLES OF OPERATION 1) DE
Page 123 and 124:
REV .A PRINCIPLES OF OPERATION (10)
Page 125 and 126:
REV.A PRINCIPLES OF OPERATION (3) B
Page 127:
CHAPTER 3 OPTIONS TAßlE OF CONTENT
Page 131 and 132:
REV.A TROUBLESHOOTIBG 4.1 Service T
Page 133 and 134:
RKV.A TROUBLESHOOTING INSTANCE 1 In
Page 135 and 136:
REV.A TROUBLESHOOTIBG 4.3 RESPONSE
Page 137 and 138:
t PORT 80 01H 04H 05H 06H 07H or 08
Page 139 and 140:
t (3) Error bit pattern (1 second)
Page 141 and 142:
tt-' t-' 22H 23H 25H II GAATIO 8259
Page 143 and 144:
2AH 2BH 8254-2 RAM, GAATIO option b
Page 145 and 146:
t~ I.n (3AH) Unfixed value (Address
Page 147 and 148:
,... I ..... .t:' (3FH) Unfixed v
Page 149 and 150:
ol:l I t \C (45H) WHDC Unfixed
Page 151:
.p I N ""'" Parity check 1 80000
Page 154 and 155:
Fi gure 5-1-1 5-1-2 5-1-3 5-1-4 5-1
Page 156 and 157:
DIASSEMBLY AND ASSEMBLY HEV.A 5.1.3
Page 158 and 159:
DIASSEMBLY AND ASSEMBLY REV.A 5.1.7
Page 160 and 161:
DIASSKMBLY AN» ASSKMBLY HEV.A 5.1.
Page 162 and 163:
DISASSEMBLY AND ASSEMBLY REV.A 5.1.
Page 164 and 165:
DISASSEKBLY ABO ASSEKBLY REV.A 5.1.
Page 166 and 167:
DISASSEMBLY AND ASSEMBLY REV.A 5.3
Page 168 and 169:
DISASSEMBLY AND ASSEMBLY REV.A 5.3.
Page 171:
CHAPTER 6 ADJUSTMENT AHD MAINTENANC
Page 174 and 175:
7-1-8 Factory Settings (SPFG Board)
Page 176 and 177:
DIAGRAMS AND REFERENCE MATERIALS RE
Page 178 and 179:
DIAGRAKS AHn REFERENCE MATERIALS HE
Page 180 and 181:
Page 182 and 183:
DIAGRAHS AND REFERENCE MATERIALS RE
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
DIAGRAHS AHn REFERENCE MATERIALS RE
Page 190 and 191:
DIAGRAMS AN» REFERENCE MATERIALS R
Page 192 and 193:
D1AGRAKS AND REFERENCE MATERIALS RE
Page 194 and 195:
DIAGRAMS AHn REFERENCE MATERIALS HE
Page 196 and 197:
Page 198 and 199:
DIAGRAMS AND REFERENCE MATERIALS HE
Page 200 and 201:
Page 202 and 203:
DIAGRAMS AHn REFERENCE MATERIALS RE
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
DIAGRAMS ARD REFERENCE MATERIALS RE
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
DIAGRAKS AND REFERENCE MATERIALS HE
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
DIAGRAMS AB» REFERENCE MATERIALS R
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
DIAGRAMS AND REFERENCE MATERIALS KE
Page 240 and 241:
Page 242 and 243:
DIAGRAHS AND REFERENCE MATERIALS HE
Page 244 and 245:
Page 246 and 247:
DIAGRAMS AN» REFERENCE MATERIALS H
Page 248 and 249:
Page 250 and 251:
DIAGRAMS AN» REFERENCE MATERIALS H
Page 252 and 253:
Page 254 and 255:
DIAGlU\MS AND REFERENCE MATERIALS H
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
DIAGRAMS ABO REFERENCE MATERIALS RE
Page 267 and 268:
8.1 MAJOR PARTS 8.1.1 Excluding P.C
Page 269 and 270:
8.2 COMPONENT PARTS 8.2.1 ANTA Boar
Page 271 and 272:
Unit Description ANTA Board (6) Mod
Page 273 and 274:
8.2.3 ANT-RMA Board Unit Modificati
Page 275 and 276:
8.2.5 SPFG Board Unit Modification
Page 277 and 278:
8.3.2 ANT-RM/RMA Board Jumper Setti
Page 279 and 280:
8.3.4 WHDC Board Jumper Settings Un
Page 281:
(Xl .... I 01 8.4.2 P.C.B Unit Boar
Page 285 and 286:
1 2 3 4 +5 +5 A B c o E F G H R8 Sl
Page 287 and 288:
1 2 3 4 5 +5 +5 A B c o E F G H R8
Page 289 and 290:
1 2 3 4 5 +5 +5 A B c o E F G H R8
Page 291 and 292:
A B c D E F G H J K L M N o p 4~3 ~
Page 293 and 294:
I T MD 111 I" 13 12 • 11 10 9 •
Page 295:
PG TO POWER SUPPlY UNIT NO CONNECT
Page 298 and 299:
OUTPUT SOCKET ® RIII CI06 O.OI/lF
Page 300 and 301:
T DACK2 2 3 4 t- 0 ...J CJ) Z 0 5 0
Page 302 and 303:
A B c o E F G H 1 2 3 4 5 6 I ọ
Page 304 and 305:
* +5V -r ,,;I: R2 01 ~ J27K + ~ CI
Page 307 and 308:
I A B c o E F G H T 2 3 JI -DRIVE S
Page 309 and 310:
134 132 126 500 \ --- ~ I 103 /~'~3
Page 311 and 312:
EPSON OVERSEAS MARKETING LOCATIONS
show all

1 - Al Kossow's Bitsavers

Create successful ePaper yourself

Delete template?

Save as template?