Panasonic sa ak 640 eb service manual

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ORDER NO. MD0601012C2

Service Manual

COMPACT

DIGITAL AUDIO

Remote SB-AK64O SA-AK640 SB-WAK640 SB-AK640

Control

CD Stereo System

SA-AK640E
SA-AK64OEB
SA-AK640EG

Colour
(8)... Silver Type

Notes: This models CD mechanism changer unit is

(Order No. MD050936800) for this mechanism.

CRS1. Please refer to the original Service Manual

Specifications
n 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 FMIAM 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 W (IHF)

2.2 V

75 Q (unbalanced)

Sensitivity

S/N 26113

Antenna terminal(s)
Amplitude Modulation (AM)
Frequency range 522 to 1629 kHz (9 kHz step)
Sensitivity

S/N ZOdB (at 999 kHz) 560 uV/m

Panasonic

Music Port input jack

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

Terminal Stereo, 3.5 mm jack

n CASSETTE DECK SECTION

Track system 4 track, 2 channel

Heads

Record/playback Solid permalloy head
Erasure Double gap ferrite 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
(3-50 cassette tape

11 DISC SECTION

Disc played [8 cm or 12 cm]

(1) CD-Audio (CD-DA)

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

(3) MP3/WMA

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

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SA-AKGAOE I SA-AKSAOEB l SA-AKGAOEG

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)
Pick up

Wavelength 780 nm

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

n GENERAL

2 (Stereo) (FL,FR)

Power supply

For E/EG only AC 230 V, 50HZ

For EB only AC 230 to 240 V, 50Hz
Power consumption 128 W
Power consumption in standby 0.5 W

mode

Dimensions (W x H x D) 250 x 330 x 343 mm

Mass
Operating temperature range
Operating humidity range

7.1 kg
+5 to +35°C
5 to 90% RH (no condensation)

n SYSTEM
SC-AK640 (E) Music center: SA-AK640 (E)
Speaker: SB-AK640 (EG)
Subwoofer: SB-WAK640 (EG)
SC-AK640 (EB) Music center: SA-AK640 (EB)
Speaker: SB-AK640 (EG)
Subwoofer: SB-WAK640 (EG)
SC-AK640 (EG) Music center: SA-AK640 (EG)
Speaker: SB-AK640 (EG)
Subwoofer: SB-WAK640 (EG)

For information on speaker system, please refer to the original
Service Manual (Order No. MD060100602) for SB-AK640EG and
(Order No. MD0601007C2) for SB-WAK64OEG.
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. Caution for AC Mains Lead -------------------------------------------- 5
1.3. Before repair and adjustment ----------------------------------------- 5
1.4. Protection Circuitry --------------------------------------------------------- 6
2 Prevention of Electra Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices --------------------------------- 6

3 Handling Precautions For Traverse Deck-
4 Precaution of Laser Diode
5 Handling the Lead-free Solder

5.1. About lead free solder (PbF) .......................................... g
6 New Features ------------------------------------------------------------------------ 10
6.1. CRS1 Mechanism Overview ----------------------------------------- 10
6.2. Music Port ------------------------------------------------------------------- 12
7 Accessories -------------------------------------------------------------------------- 13

8 Operating Instructions Procedures -----

9 Self diagnosis and special mode setting
9.1. Special Mode Tabl
9.2. Error code Table

1o Assembling and Disassembling ------------------------------------------- 22
10.1. Caution ------------------------------------ 22
10.2. Disassembly flow chart ----------------------------------------- 23
10.3. Main Parts Location--- -------------------------------------- 24

10.4. Disassembly of Top Cabinet ......................................... 25

Page

10.5. Disassembly of Rear Panel .......................................... 25
10.6. Disassembly of CD Changer Unit (CRSt) ..................... 25
10.7. Disassembly of Main P.C.B. ......................................... 27
10.8. Disassembly of Transformer P.C.B. .............................. 27
10.9. Disassembly of Power P.C.B. ................................ 28
10.10. Disassembly of Front Panel Unit ................................... 29

10.11. Disassembly for Panel P.C.B.
10.12. Disassembly of Deck mechanism uni
10.13. Disassembly of Deck P.C.B.
10.14. Disassembly of Traverse Uni

10.15. Disassembly of optical pickup unit (CD mechanism) ------ 33

10.16. Disassembly of Deck Mechanism ---------------------------------- 35
10.17. Replacement for cassette lid ......................................... 33
10.18. Rectification for tape jam problem ................................. 39
11 Service Fixture and Tools ..................................................... 40

12 Service Positions ......................................................... 40
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. ------------------------------------------------------- 42

12.4. Checking and Repairing of Power P.C.B. ...................... 43

13 Adjustment Procedures -------------------------------------------- 44
13.1. Cassette Deck Section ................................................. 44
13.2. Tuner Section .............................................................. 45