Panasonic SA-AK640E User manual

nAMPLIFIER SECTION
RMS output power
THD 10%,
1 kHz
(Low channel-both channels driven)
90 W per channel (3 Ω)
10 kHz
(High channel-both channels driven)
90 W per channel (3 Ω)
60 Hz
(Subwoofer channel) 180 W (8 Ω)
Total output power 540 W
nFM/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)
Sensitivity 4.0 µV (IHF)
S/N 26dB 2.2 µV
A
ntenna terminal(s) 75 Ω(unbalanced)
A
mplitude Modulation (AM)
Frequency range 522 to 1629 kHz (9 kHz step)
Sensitivity
S/N 20dB (at 999 kHz) 560 µV/m
©2006 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-AK640E
SA-AK640EB
SA-AK640EG
Colour
(S)... Silver Type
Music Port input jack
Terminal Stereo, 3.5 mm jack
Sensitivity 100 mV, 4.7 kΩ
Phone jack
Terminal Stereo, 3.5 mm jack
nCASSETTE DECK SECTION
Track system 4 track, 2 channel
Heads
Record/playback Solid permalloy head
Erasure Double gap ferrite head
Motor DC servo motor
Recording system AC bias 100 kHz
Erasing system AC erase 100 kHz
Tape speed 4.8 cm/s
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
C-60 cassette tape
nDISC 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
CD Stereo System
Notes: This model’s CD mechanism changer unit is CRS1. Please refer to the original Service Manual
(Order No. MD0509368C0) for this mechanism.
Specifications
ORDER NO. MD0601012C2

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 8fs
D/A converter MASH (1 bit DAC)
Pick up
Wavelength 780 nm
Beam Source Semiconductor laser
A
udio output (Disc)
Number of channels 2 (Stereo) (FL,FR)
nGENERAL
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
mode
0.5 W
Dimensions (W x H x D) 250 x 330 x 343 mm
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 Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 6
3 Handling Precautions For Traverse Deck 7
4 Precaution of Laser Diode 8
5 Handling the Lead-free Solder 9
5.1. About lead free solder (PbF) 9
6 New Features 10
6.1. CRS1 Mechanism Overview 10
6.2. Music Port 12
7 Accessories 13
8 Operating Instructions Procedures 14
9 Self diagnosis and special mode setting 16
9.1. Special Mode Table 16
9.2. Error code Table 18
10 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
Mass 7.1 kg
Operating temperature range +5 to +35°C
Operating humidity range 5 to 90% RH (no condensation)
nSYSTEM
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. MD0601006C2) for SB-AK640EG and
(Order No. MD0601007C2) for SB-WAK640EG.
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.
10.5. Disassembly of Rear Panel 25
10.6. Disassembly of CD Changer Unit (CRS1) 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. 30
10.12. Disassembly of Deck mechanism unit 31
10.13. Disassembly of Deck P.C.B. 31
10.14. Disassembly of Traverse Unit 31
10.15. Disassembly of optical pickup unit (CD mechanism) 33
10.16. Disassembly of Deck Mechanism 36
10.17. Replacement for cassette lid 38
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. 40
12.2. Checking and Repairing of Transformer P.C.B. 41
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
CONTENTS
Page Page
2
SA-AK640E / SA-AK640EB / SA-AK640EG

14 Voltage and Waveform Chart 47
14.1. CD Servo P.C.B. & Main P.C.B. 47
14.2. Power P.C.B. & Transformer P.C.B. 49
14.3. Waveform Chart 50
15 Wiring Connection Diagram 52
16 Block Diagram 53
17 Schematic Diagram 57
17.1. Notes of Schematic Diagrams 57
17.2. (A) CD Servo Circuit 59
17.3. (B) Main (Tuner) Circuit 61
17.4. (B) Main Circuit 63
17.5. (C) Panel Circuit 67
17.6. (D) Transformer Circuit 69
17.7. (H) Power Circuit 71
17.8. (F) Deck Circuit & (G) Deck Mechanism Circuit 75
18 Printed Circuit Board 77
18.1. (A) CD Servo P.C.B. 78
18.2. (B) Main P.C.B. 79
18.3. (C) Panel P.C.B. 80
18.4. (D) Transformer P.C.B. 81
18.5. (E) Power P.C.B. 82
18.6. (F) Deck P.C.B. & (G) Deck Mechanism P.C.B. 83
19 Illustration of ICs, Transistors and Diodes 85
20 Terminal Function of IC's 86
20.1. IC7001 (MN6627954MA) Servo Processor,Digital Signal
Processor/Digital filter and D/A Converter 86
20.2. IC7002 (BA5948FPE2) IC 4CH Drive 87
20.3. IC2801 (C2CBYY000066) System Microprocessor 87
21 Exploded Views 89
21.1. Cabinet Parts Location 91
21.2. Deck Mechanism Parts Location (RAA4502-S) 93
21.3. Packaging 95
22 Replacement Parts List 97
3
SA-AK640E / SA-AK640EB / SA-AK640EG

1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, ensure that all the protective devices such as insulation barriers and insulation papers shields are properly
installed.
3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.
1.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1MΩand 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be .
Fig. 1
1.1.2. Leakage Current Hot Check (See Figure 1)
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF capacitor, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may
be used to make the hot checks, leakage current must not exceed 1/2 milliamp. Should the measurement is out of the limits
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
4
SA-AK640E / SA-AK640EB / SA-AK640EG

1.2. Caution for AC Mains Lead
1.3. Before repair and adjustment
Disconnect AC power, discharge Power Capacitors C5101, C5104, C5171, C5172, C5920, C5940 and C5950 through a 10Ω,5W
5
SA-AK640E / SA-AK640EB / SA-AK640EG

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 240V, 50 Hz in NO SIGNAL mode (volume min at CD mode) should be ~ 350mA.
1.4. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
· No sound is heard when the power is turned on.
· Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note :
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as aluminium
foil, to prevent electrostatic charge build up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminium foil or
comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to
damage an ES device).
6
SA-AK640E / SA-AK640EB / SA-AK640EG

3 Handling Precautions For Traverse Deck
The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by the static electricity of
clothes or our human body.
So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
· Way of handling the traverse deck (optical pickup)
1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.
2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board).
3. Do not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job
in as short time as possible.
4. Do not turn the variable resistor for laser power adjustment. (It is pre-adjusted during production time)
Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is place, 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 point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to
remove the solder from the short point before making connections.
7
SA-AK640E / SA-AK640EB / SA-AK640EG

nUse of caution label
4 Precaution of Laser Diode
Caution :
This product utilizes a laser diode with the unit turned "ON", invisible laser radiation is emitted from the pick up lens.
Wavelength : 780 nm
Maximum output radiation power from pick up : 100 µW/VDE
Laser radiation from pick up unit is safety level, but be sure the followings:
1. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pick up lens for a long time.
ACHTUNG :
Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit
abgestrahlt.
Wellenlänge : 780nm
Maximale Strahlungsleistung der Lasereinheit :100 µW/VDE
Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:
1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.
2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.
3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.
4. Nicht über längere Zeit in die Fokussierlinse blicken.
ADVARSEL: I dette a apparat anvendes laser.
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.
8
SA-AK640E / SA-AK640EB / SA-AK640EG

5 Handling the Lead-free Solder
5.1. About lead free solder (PbF)
Distinction of PbF P.C.B.:
P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.
Caution:
· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please
use a high temperature soldering iron. In case of soldering iron with temperature control, please set it to 700 ± 20°F (370 ±
10°C).
· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
· When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the
soldering points with the Pb free solder until it melts enough.
9
SA-AK640E / SA-AK640EB / SA-AK640EG

6 New Features
6.1. CRS1 Mechanism Overview
6.1.1. General Feature
· This is a five disc changer mechanism for CD/DVD. The outline figure is shown below.
10
SA-AK640E / SA-AK640EB / SA-AK640EG

· The mechanism has "CHANGE WHILE PLAY" function. It open other trays for disc exchanging while one tray is at PLAY
position performing recording or reproducing.
· The mechanism can quickly change all trays with "CHANGE ALL" function. All trays can be move to OPEN position with one
operation.
· There is no sensor to indicate presence of disc on any tray.
6.1.2. Hardware composition
· Below is the hardware components of the mechanism
Name Function
Open Switch (OPEN-SW) The switch is used to detect normal tray opening
The switch is used for detect tray being manually push/trigger when full open
Home Switch (HOME-SW) Is used to detect cam gear home position
Close Sensor (CLOSE-SENSOR) Used for normal single tray closing
Used to detect cam gear rotate to Play Driving position
Play Switch (PLAY-SW) Detect TRV clamping complete position
Stocking Switch (STOCK-SW) Detect tray completely transfer for play position to stocking position
UD Sensor (UD-SENSOR) Detect TRV vertical movement position
Top Switch (TOP-SW) Detect a default position of TRV vertical movement position
Driver IC To drive Motor
Motor Main driving source for changer
Plunger Switching the driving source from motor to:
1. Tray open/close
2. Drive tray to play/stock position and TRV vertical movement
6.1.3. Mechanism Operation
· This mechanism has the following state:
1. Driving of a tray to open/close
2. Up/down operation of a traverse performs a state changes of tray.
By using the plunger to lift/release of a switching gear, and the cam gear to lift/release the function gear the motor can be link
to several gear trains to perform various operations.
· The functions that can be perform in this mechanism are described as below:
Condition Explanation
Open current playing tray The state to change current playing disc. All tray will be open at once and current tray at PLAY position
will be expose.
Open All The state where all trays being driven to OPEN position. The disc can be taken in or out from tray to tray
by close tray one by one from top to bottom.
Stock The state where the trays are stored in STOCK position
Play The state where one of the tray 5 trays is being driven to PLAY position and clamped by traverse unit
Play & Open Tray-* The state where one of the tray is in playing position performing recording or reproducing, other trays can
be used (OPEN position) for disc exchanging without stopping the recording or reproducing process.
Change The state when one of the opened tray being driven from OPEN position to STOCK position and other
opened trays remain still at OPEN position.
Close All The state where all open trays will being driven from OPEN position to STOCK position, one by one from
top to bottom
11
SA-AK640E / SA-AK640EB / SA-AK640EG

With reference to page 16 of the operating instruction manual.
Note: * represent tray number (from 1 ~ 5)
6.1.4. New CD Mechanism (CRS1)
Note:
This service manual does not contain the following information for the mention CD Mechanism drive:
· Schematic Diagram, Block Diagram and P.C.B. layout of CD Loading P.C.B.
· Part List for individual parts of the mechanism.
· Exploded View and Parts List for individual parts of the CD Mechanism drive.
Please refer to the original service manual (Order No. MD0509368C0) for the CD Mechanism Drive CRS1.
6.2. Music Port
12
SA-AK640E / SA-AK640EB / SA-AK640EG

7 Accessories
Remote Control
FM Antenna Wire
AC Cord (For E/EG
only)
AC Cord (For EB
only)
AM Loop Antenna
Antenna
Adaptor
(For EB
only)
13
SA-AK640E / SA-AK640EB / SA-AK640EG

8 Operating Instructions Procedures
14
SA-AK640E / SA-AK640EB / SA-AK640EG

15
SA-AK640E / SA-AK640EB / SA-AK640EG

9 Self diagnosis and special mode setting
This unit is equipped with functions for checking and inspecting namely: Self-Diagnostic and Test Mode.
9.1. Special Mode Table
Item FL Display Key Operation
Mode Name Description Front Key
Self -Diagnostic
Mode
To enter into self
diagnostic checking for
main unit.
1. Select [
] for TAPE mode (Ensure no tape is
inserted).
2. Press and hold [ ]button for 3
seconds follow by [ ].
To exit, press button on
main unit or remote control.
CD Test Mode To enter into checking the
reliability of changer unit.
1. Select [ ] for CD mode.
2. Press and hold [ ] button for 3
seconds follow by [ ].
To exit, press button on
main unit or remote control.
CD Auto
Adjustment
To check the CD auto
adjustment result for
FLOCK, TLOCK and
CLVS.
In CD Test Mode:
1. Press [0] button on the remote control.
To exit, press button on
main unit or remote control.
CD Changer
Reliability Test
(CRS1)
To determine the
reliability of CD Changer
Unit.
(For more information,
refer to section 9.1.1)
In Self-Diagnostic Mode:
1. Select [ ] for CD mode.
2. Press [ ] button.
To exit, press button on
main unit or remote control.
(The tray will return to PLAY position and then
power off)
Doctor Mode To enter into Doctor
Mode for checking of
various items and
displaying EEPROM and
firmware version.
1.
2.
1. All segments will light up for 1 second.
2. The Check Sum of EEPROM and firmware
version will be display.
* ROM correction
** Firmware version No:
In any mode:
1. Press [ ] button on main unit
follow by [4] and [7] on remote control.
To exit, press [ENTER] button on remote
control or button on main
unit or remote control.
Cold Start To activate cold start
upon next AC power up.
In doctor mode:
1. Press [4] button on remote control.
To exit, press [ENTER] button on remote
control or button on main
unit or remote control.
Changer
Reliability Test
To check the function
operation of changer unit.
(For more information,
refer to 9.1.1)
In doctor mode:
1. Press [DISC] on remote control.
To exit, press [ENTER] button on remote
control or button on main
unit or remote control.
16
SA-AK640E / SA-AK640EB / SA-AK640EG

Item FL Display Key Operation
Mode Name Description Front Key
FL Display Test To check the FL
segments display (All
segments will light up and
LED will blink at 0.5
second interval)
In doctor mode:
1. Press [DIMMER] button on remote control.
Tape Eject Test To check on the tape
eject function (For deck
1/2)
In doctor mode:
1. Press [PROGRAM] button on remote
control.
9.1.1. CD changer unit ageing test mode
Below is the process flow chart of ageing for the CD changer unit. (CRS1)
17
SA-AK640E / SA-AK640EB / SA-AK640EG

9.2. Error code Table
Self-Diagnosis Function (refer Section 9.1) provides information on any problems occuring for the unit and its respective
components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is
cleared.
18
SA-AK640E / SA-AK640EB / SA-AK640EG

The error code is automatically display after entering into self-diagnostic mode.
Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
H01 Mode SW, plunger
and capstan motor
abnormal
For deck mechanism unit (For deck 1/2).
Press [ ] on main unit for
next error.
H02 Rec INH SW
abnormal
For deck mechanism unit (For deck 2).
Press [ ] on main unit for
next error.
H03 HALF SW abnormal For deck mechanism unit (For deck 1/2).
Press [ ] on main unit for
next error.
F01
F02
Reel pulse abnormal
TPS error
For deck mechanism unit (For deck 1/2).
Press [ ] on main unit for
next error.
F15 RESET SW
abnormal
REST SW: ON is not
detected within the
specified time.
For CD unit (For Traverse).
Press [ ] on main unit for
next error.
F26 Transmission error
between CD Servo
LSI IC and
microprocessor IC
When set to CD mode,
the sense signal does
not turn “Low”, a fail safe
time after system
command transmission
is sent.
For CD unit (For Traverse).
Press [ ] on main unit for
next error.
F61 Power Amp IC output
abnormal
Upon power on,
PCONT=HIGH,
DCDET=L after checking
LSI.
For power.
Press [ ] on main unit for
next error.
IHMS Cam gear
abnormality
Cam gear does not
rotate to “HOME”
position.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
ICSL Cam gear/gear units
abnormal
Cam gear does not
rotate to “PLAY” driving
position and hence does
not drive playing tray to
“STOCK” position.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
ISTK Drive rack/gear
assembly abnormal
The tray drive rack does
not move to “STOCK”
position. (Tray does not
move to “STOCK”
position)
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
IPLY Drive rack/gear
assembly abnormal
The tray drive rack does
not move to “PLAY”
position. (Tray does not
move to “PLAY” position)
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
19
SA-AK640E / SA-AK640EB / SA-AK640EG

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
ITOP UD assembly UD Rack does not move
to front direction. This
lead to UD base not
raise to top position.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
IUDS UD assembly After TOP SW is
detected, UD rack does
not move into tray 1
position.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
HOME Cam gear/gear
assembly abnormal
Cam gear does not
move to “HOME”
position under following
conditions
1. After tray is load to
“PLAY” position.
2. After tray is unload
to “STOCK” position.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
LOAD Tray drive assembly
abnormal
Tray unit does not move
from “STOCK” to “PLAY”
position
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
PDRV Cam gear/gear
assembly abnormal
Cam gear does not
move from “HOME” to
“PLAY” drive position.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
UDU UD base asssembly
abnormal
UD Base assembly does
not move upwards from
tray 5 to tray 2
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
UDD UD base asssembly
abnormal
UD Base assembly does
not move downwards
from tray 1 to tray 5.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
UD1 UD base asssembly
abnormal
UD Base assembly does
not move to tray 1.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
F1NG Fail - safe mode. (For
open/close tray
unit(s))
When the tray open
operation is performed, it
fails to open. It will
automatically close all
trays after the time-out
by the microprocessor.
During this time when it
fails, the error code will
appear.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
F2NG Fail - safe mode. (For
open/close tray
unit(s))
When the tray close
operation is performed, it
fails to close. It will
automatically open all
trays after the time-out
by the microprocessor.
During this time when it
fails, the error code will
appear.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
20
SA-AK640E / SA-AK640EB / SA-AK640EG