Panasonic sa ak 631 gcp service manual

Page 2

SA-AK631GCP

Digital filter 8 fs
D/A converter MASH (1 bit DAC)
Pickup

Wavelength 780 nm

Beam Source Semiconductor laser
Audio output (Disc)
Number of channels
n GENERAL

Power Supply

2 (Stereo) (FL,FR)

AC 110-127/220-24OV, 50/60HZ

Dimensions (W x H x D)
Mass

Operating temperature range
Operating humidity range

It SYSTEM

SC-AK631 (GCP)

250 x 330 x 341 mm

7.1 kg

+5 to +35C

5 to 90% RH (no condensation)

Music center: SA-AK631 (GCP)

Speaker: SB-AK630 (GC)
Subwoofer: SB»WAK630 (GC)
Notes:

1.Specifications are subject to change without notice. Mass and
dimensions are approximate.

Power consumption 279 W
Power consumption in standby 0.85 W 2. Total harmonic distortion is measured by the digital spectrum
mode analyzer.

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical indiVIdUals of potential dangers in attempting to serVIce a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

1 Before Use ..............................

2 Before Repair and Adjustment

3 Protection Circuitry ..............
4 Prevention of Electra Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices ................................. 5

5 Handling the Lead-tree Solder ------------------------------------------------ 5
5.1. About lead free solder (PbF) .......................................... 5

6 Handling Precautions For Traverse Deck ............................... 6
7 Precaution of Laser Diode ...................................................... 7

3 Accessories -------------

9 Operation Procedures -

10 Disassembly and Assembly of Main Componen 1
10.1. Disassembly flow chart ---------------------------------------- 11
10.2. Gear for servicing (jig) Information -------------------------------- 12
10.3. Disassembly of Top Cabinet ----------------------------------------- 13
10.4. Disassembly of CD Lid ------------------------------------------------- 13
10.5. Disassembly of Rear Panel ------------------------------------- 15
10.6. Disassembly of CD Mechanism Unit ----------------------------- 15
10.7. Disassembly of Main P.C.B. ----------------------------------------- 16
10.8. Disassembly of Sub-Power P.C.B -16
10.9. Disassembly of Power P.C.B. -- 7

10.10. Disassembly of Transformer P.C.B. & Voltage Selector-- 18
10.11. Disassembly of Front Panel Unit ----------------------------------- 19
10.12. Disassembly of Deck Mechanism Unit --------------------------- 19
10.13. CD Mechanism Main Component Replacement
Procedures ------------------------------------------------------------------ 20
10.14. Replacement for the pinch roller ass |] and head block-34
10.15. Replacement for the Deck motor ass |] , capstan belt A,

capstan belt B and winding belt -----------
10.16. Replacement for the cassette lid ass D
10.17. Rectification for tape jam problem -----

11 Checking for major P.C.Bs --
11.1. Checking of Main P.C.B.
11.2. Checking of Transformer P.C.B.-
11.3. Checking of Panel, Deck & Deck Mechanism P.C.B. ----- 42

11.4. Checking of Power P.C.B. -------------------------------------------- 43
12 Self-Diagnostic Function --------------------------------------------- 44
12.1. Self-diagnostic display -------------------------------------- 44
12.2. How to enter the Self-Diagnostic Function --------------------- 44
12.3. Cassette Mechanism Test (For error code H01, H02, H03,
F01) ------------------------------------------------------------------- 44

12.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29,
F30, H15 & H16) ---------------------------------------------------------- 44
12.5. To clear all Error code -------------------------------------------------- 45
12.6. To exit from Self»Diagnostic function ----------------------------- 45
12.7. Power Amplifier Failure (F61) --------------------------------------- 45
12.8. Description of Error Code --------------------------------------------- 45
13 CD Test Mode Function -------------------------------------------------------- 47
13.1. How to set CD test mode ------------------------------- 47
13.2. CD Automatically Adjustment result indication --------------- 47

13.3. CD Mecha Aging Test Mode (CRzo) ..................
13.4. Micon ROM Checksum and Version Display Mode
14 MEasurements and Adjustments ...............................

14.1. Cassette Deck Section ------------------------------------------------- 49
14.2. Tuner Section -------------------------------------------------------------- 49
14.3. Alignment Points ---------------------------------------------------------- 50
15 Block Diagram ---------------------------------------------------------------------- 51
16 Voltage Measurement ........................................................... 59
17 Schematic Diagram --------------------------------------------------------------- 61

17.1. (A) CD Servo Circuit
17.2. (B) Main (Tuner) Circui
17.3. (B) Main Circuit -------