Panasonic' - Tecnicosaurios

SA.AKl5
: WARNING
This servlce information is designed for experiense repair technicians only and is not designed for use by the general public. lt does not contain
warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electr¡city
should be serviced or repaired only by experienced professional technicians. Any attempto service or repair the product or products dealt with
in th¡s service information by anyone else could result in serious iniury or death.
I Gontents
Page
BEFORE REPAIR AND ADJUSTMENT ..........
2 MEASUREMENTS AND ADJUSTMENTS
19-20
HANDLING PRECAUTIONS FOR TRAVERSE DECK ..... 2 TERMINAL FUNCTION OF lC's
21 -23
SAFETY PRECAUTIONS ..
2 WIRING CONNECTION DIAGRAM
24
PROTECTION CIRCUITRY
3 BLOCK DIAGRAM
25- 31
PRECAUTION OF LASER DIODE
3 TERMINAL GUIDE OF lC's. TRANSISTORS AND DIODES.. 32
ACCESSORIES
3 SCHEMATIC DIAGRAM
32-45
CONNECTIONS
4 PRINTED CIRCUIT BOARD
qO - J I
FRONT PANEL CONTROLS .....
4 TROUBLESHOOTINGUIDE
52
SETTING THE TIME
5 MECHANISM PARTS LOCATION (RAA34O7)
53-54
LISTENING TO COMPACT DISCS (PROGRAM PLAY)
5 MECHANISM PARTS 1IST............
55
LjSTENTNG TO COMPACT DTSCS (CD MANAGER FUNCTTON) .... 6 LOADING MECHANISM PARTS LIST ,...........
55
BEFORE RECORDTNG (DECK 2 ONLY) .............
7 CD LOADING UNIT PARTS LOCATION
56
RECORDING FROM COMPACT DISCS
7-8 CABINET PARTS LOCATION
57,58
REMOTE CONTROL BUTTONS & FUNCTIONS
9 REPLACEMENT PARTS LIST ............
59 - 6.t
OPERATION CHECKS & MAIN COMPONENT REPLACEMENT..... 10 - 15 RESTSTORS & CApACTTORS ...........
62-65
SELF.DIAGNOSTIC DISPLAY FUNCTION
16 - 17 PACKING MATERIALS & ACCESSORIES .,,........,,......... 66
CD TEST MODE FUNCTION
18 PACKAGING,,,
I Before Repair and Adjustment
Disconnect AC power, discharge both Power Supply Capacitors C504 and C505 through a 10O , 5W resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 120V, 60 Hz, in NO SIGNAL mode should be -450 mA.
Page
ol
I Handling Precaut¡ons For Traverse Deck
The laser diode in the traverse deck (optical pickup) may break down due to potential difference
caused by static electricity of clothes or human body.
So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
. Handling of traverse deck (optical pickup)
f:FC board
1. Do not subjecthe traverse deck (optical pickup) to static electricity as it is
extremely sensitive to electrical shock.
2. To preventhe breakdown of the laser diode, an antistatic shorling pin is
insefied into the flexible board (FFC board).
When removing or connecting the short pin, finish the job in as short time
as possible.
3. Take care not to apply excessive stress to the flexible board (FFC board).
4. Do not turn the variable resistor (laser power adjustment). lt has already
been adjusted.
. Grounding for electrostat¡c breakdown prevention
Short poinl
Lens (Do noi touch)
Optical pickup
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your
Dooy.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on thearea where the
traverse deck (optical pickup) is placed, and ground the sheet.
Caution :
The static electricity of your clothes will not be grounded
through the wrist strap. So, take care not to let your
clothes touch the traverse deck (optical pickup).
Caution when Replacing the Traverse Deck:
The traverse deck has a short po¡nt shorted with solder to protecthe laser
diode against electrostatics breakdown. Be sure to remove the solder f rom
the short point before making connections.
No. @ (GND) pin
No. €) (LD) pin
Wrist strap
-\--7
(Anti-:19!9 ilegqglll
lron plate or some metals to
conducl electr¡city
Variable resislor
(Do not turn)
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