Panasonic sa ak640gcp audio

Page 1

ORDER NO. MD060101GC3

Service Manual

COMPACT

DIGITAL AUDIO

Remote SB-AK640 SA-AK640
Control

SB-WAK640 SB-AKSAO

CD Stereo System
SA-AK640GCP

Colour
(8)... Silver Type

Notes: This models CD mechanism changer unit is CRS1. Please refer to the original Service Manual

(Order No. MD0509368C0) for this mechanism.

Specifications
11 AMPLIFIER SECTION
RMS output power
THD 10%,
1 kHz
(Low channel-both channels driven)
90 W per channel (3 Q)
10 kHz
(High channel-both channels driven)
90 W per channel (3 Q)

60 Hz
(Subwoofer channel) 180 W (8 Q)
Total output power 540 W

n FM/AM TUNER, TERMINALS SECTION

Preset station FM 15 stations

AM 15 stations
Frequency Modulation (FM)

Frequency range

87.50 to 108.00 MHz (50 kHz steps)

4.0 (N (IHF)

2.2 (iv

75 Q (unbalanced)

Sensitivity

S/N 26dB

Antenna terminal(s)
Amplitude Modulation (AM)
Frequency range 522 to 1629 kHz (9 kHz step)
520 to 1630 kHz (10 kHZ step)

Sensitivity

Panasonic

S/N 20dB (at 999 kHz)
Music Port input jack

560 uV/m

Terminal Stereo, 3.5 mm jack
Sensitivity 100 mV, 4.7 kn
Phone jack

Terminal Stereo, 3.5 mm jack
Mic jack

Terminal Mono, 3.5 mm jack
Sensitivity 0.7 mV, 680 Q

n CASSETTE DECK SECTION

Track system 4 track, 2 channel

Heads

Record/playback Solid permalloy head
Erasure Double gap Ierrite head
Motor DC servo motor

AC bias 100 kHz
AC erase 100 kHz
4.8 cm/s

Recording system
Erasing system
Tape speed
Overall frequency response (+3, -6 dB) at DECK OUT
NORMAL 35 HZ to 14 kHz
S/N ratio 50 dB (A weighted)
Wow and flutter 0.18 % (WRMS)
Fast forward and rewind time Approx. 120 seconds with
0-60 cassette tape
n DISC SECTION

© 2006 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation 01 law.

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SA-AK64DGCP

Disc played [8 cm or 12 cm]

(1) CD-Audio (CD-DA)

(2) CD-R/RW (CD-DA, MP3, WMA formatted disc)
w)MPyWMA

Bit rate

MP3, WMA 32 kbps to 320 kbps
Sampling frequency

MP3/WMA 32 kHz, 44.1 kHz, 48 kHz
CD-DA 44.1 kHz
Decoding 16 bit linear
Digital filter 8 fs
D/A converter MASH (1 bit DAC)
Pmkup

Wavelength 780 nm

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

Power supply

2 (Stereo) (FL,FR)

AC 110 to 127/220 to 240 V, 50/60Hz

Power consumption 130 W
Power consumption in standby 0.6 W
mode

250 x 330 x 343 mm

11kg

+5 to +35°C

5 to 90% RH (no condensation)

Dimensions (W x H x D)

Mass

Operating temperature range

Operating humidity range

n SYSTEM

SC-AK640 (GCP) Music center: SA-AK640 (GCP)

Speaker: SB-AK640 (GO)

Subwoofer: SB-WAK640 (GC)

For information on speaker system, please refer to the original
Service Manual (Order No. MD0512476A3) for SB-AK640GC and
(Order No. MD0512477A3) for SB-WAK64OGC.
Notes:
1.Specifications are subject to change without notice. Mass and
dimensions are approximate.
2.Total harmonic distortion is measured by the digital spectrum
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

Page

1 Safety Precautions .................................................................. 4
1.1. General Guidelines -------------------------------------------------------- 4

1.2. Before Use -------------------------------------------------------------------- 4

1.3. Before repair and adjustment

1.4. Protection Circuitry ------------

2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices ................................. 5
3 Handling Precautions For Traverse Deck ............................... 5

4 Precaution of laser diode -----
5 Handling the Lead-free Solder

5.1. About lead free solder (PbF) ------------------------------------------ 8
6 New Features ----------------------------------------------------------------------- 9
6.1. CRS1 Mechanism Overview ------------------------------------------- 9

6.2. Music Port
7 Accessories

8 Operating Instructions Procedures
9 Self diagnosis and special mode setting ------------------------------ 15
9.1. Special Mode Table ----------------------------------------------------- 15

9.2. Error code Table ------------

10 Assembling and Disassembling-

10.1. Caution --------------------------
10.2. Disassembly flow chart ------------------------------------------------- 22
10.3. Main Parts Location ..................................................... 23

10.4. Disassembly of Top Cabinet --

10.5. Disassembly of Rear Panel
10.6. Disassembly of CD Changer Unit (CRSt)-

Page
10.7. Disassembly of Main P.C.B. ----------------------------------------- 26
10.8. Disassembly of Transformer P.C.B. ------------------------------ 26
10.9. Disassembly of Power P.C.B. -------------------------------------- 27

10.10. Disassembly of Front Panel Unit
10.11. Disassembly for Panel P.C.B.-
10.12. Disassembly of Deck mechanism unit --------------------------- 30
10.13. Disassembly of Deck P.C.B. ----------------------------------------- 30
10.14. Disassembly of Traverse Unit --------------------------
10.15. Disassembly of optical pickup unit (CD mechanism)
10.16. Disassembly of Deck Mechanism ------------------------

10.17. Replacement for cassette lid ......................................... 38
10.18. Rectification for tape jam problem --------------------------------- 38
11 Service Fixture and Tools ..................................................... 39

12 Service Positions ---------
12.1. Checking and Repairing of Main P.C.B.
12.2. Checking and Repairing of Transformer P.C.B.
12.3. Checking and Repairing of Panel, Deck & Deck

Mechanism P.C.B. ------------------------------------------------------- 41
12.4. Checking and Repairing of Power P.C.B.

13 Adjustment Procedures
13.1. Cassette Deck Section
13.2. Tuner Section -------------------------------------------------------------- 44

14 Voltage and Waveform Chart ------------------------------------------------ 46
14.1. CD Servo P.C.B. & Main P.C.B.-m
14.2. Power P.C.B. & Transformer P.C.B
14.3. Waveform Chart ------------------------