SA-AK340E
n AMPLIFIER SECTION
RMS Output Power
THD 10%, both channels driven
1 kHz
(Low channel) 105 W per channel (3 Ω)
10 kHz
(High channel) 105 W per channel (3 Ω)
Total Bi-Amp power 420 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)
Sensitivity 4.0 µV (IHF)
S/N 26dB 2.2 µV
A
ntenna terminals 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
Music Port input jack
Terminal Stereo, 3.5 mm jack
Sensitivity 100 mV, 4.7 kΩ
© 2006 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-AK340E
SA-AK340EB
SA-AK340EG
Colour
(S)... Silver Type
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
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
n 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
Bit rate
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. MD0512471C2
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)
n GENERAL
Power supply
For E/EG only AC 230 V, 50Hz
For EB only AC 230 to 240 V, 50Hz
Power consumption 120 W
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
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
Power consumption in standby
mode
0.5 W
Dimensions (W x H x D) 250 x 330 x 343 mm
Mass 6.9 kg
Operating temperature range +5 to +35°C
Operating humidity range 5 to 90% RH (no condensation)
n SYSTEM
SC-AK340 (E-S) Music center: SA-AK340 (E-S)
Speaker: SB-AK340 (GC-SJ)
SC-AK340 (EB-S) Music center: SA-AK340 (EB-S)
Speaker: SB-AK340 (GC-SJ)
SC-AK340 (EG-S) Music center: SA-AK340 (EG-S)
Speaker: SB-AK340 (GC-SJ)
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.
10.8. 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.
29
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 Adjustmen t Procedures
44
13.1. Cassette Deck Section
44
13.2. Tuner Section
45
14 Voltage and Waveform Chart
47
14.1. CD Servo P.C.B. & Main P.C.B.
47
14.2. Power P.C.B. and Transformer P.C.B.
49
14.3. Waveform Chart
50
15 Wiring Connection Diagram
52
16 Block Diagram
53
CONTENTS
Page Page
2
SA-AK340E / SA-AK340EB / SA-AK340EG
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
73
18 Printed Circuit Board
75
18.1. (A) CD Servo P.C.B.
76
18.2. (B) Main P.C.B.
77
18.3. (C) Panel P.C.B.
78
18.4. (D) Transformer P.C.B.
79
18.5. (E) Power P.C.B.
80
18.6. (F) Deck P.C.B. & (G) Deck Mechanism P.C.B.
81
19 Illustration of ICs, Transistors and Diodes
83
20 Terminal Function of IC's
84
20.1. IC7001 (MN6627954MA) Servo Processor,Digital Signal
Processor/Digital filter and D/A Converter
84
20.2. IC7002 (BA5948FPE2) IC 4CH Drive
85
20.3. IC2801 (C2CBYY000053) System Microprocessor
85
21 Exploded Views
87
21.1. Cabinet Parts Location
87
21.2. Packaging
90
22 Replaceme nt Parts List
91
3
SA-AK340E / SA-AK340EB / SA-AK340EG
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 1MΩ and 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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
n Use 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/VD E
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
·
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
8 Operating Instructions Procedures
14
SA-AK340E / SA-AK340EB / SA-AK340EG
15
SA-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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 [PROGRAM] 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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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-AK340E / SA-AK340EB / SA-AK340EG
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.
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SA-AK340E / SA-AK340EB / SA-AK340EG
Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
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.
SRVC_TRV To unlock the
traverse unit for
service
1. All trays set to
“STOCK” position
2. Mechanism set to
tray 5
3. Cam gear set to
“HOME” position
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
RSET Cam gear jam/close
sensor faulty
During tray re-open,
the cam gear will rotate
in the opposite
direction to reset the
cam gearposition.
When it fails, the error
code will appear.
For CD changer unit (CRS1).
Press [SINGLE CHANGE] on main unit
for next error.
CRS1 Error Code display
1. The errors that occured in CRS1 Mechanism can be recalled and displayed, in the order of the occurence under self-diagnostic
(Refer to Section 9.1 for procedures to enter this mode.
·
Only the first 5 errors will be memorized (in backup memory). The subsequence error shall be ignored and not memorize.
For system with EEPROM as memory backup,memory space in EEPROM is neccesary.
2. To display all error code memorized
In CRS1 Self-Diagnostic mode, press [SINGLE CHANGE] to display subsequence error code.
It shall repeat after reaching error no. 5.
e.g.:
[1____IHMS]→ [SINGLE CHANGE]
[2____ITOP]→ [SINGLE CHANGE]
[3____HOME]→ [SINGLE CHANGE]
[4____LOAD]→ [SINGLE CHANGE]
[5_____UDD]→ [SINGLE CHANGE]
3. To clear the error code memory
In CRS1 Self-Diagnostic mode, long press [SINGLE CHANGE] key (2s or more)
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SA-AK340E / SA-AK340EB / SA-AK340EG
10.1. Caution
Below is the list of disassembly sections
10 Assembling and Disassem bling
Special Note:
This model uses a new CD changer unit CRS1. In this following section does not contain the necessary disassembly &
assembly information for the CD changer unit (CRS1) except the disasembly & assembly of traverse unit. Kindly refer to the
original service manual for the CD changer unit. (Order No. MD0509368C0).
“ATTENTION SERVICER”
Some chassis components may have sharp edges. Be careful when disassembling and servicing.
1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main
components.
2. For reassembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
3. Select items from the following index when checks or replacement are required.
4. Refer to the Parts No. on the page of “Parts Location and Replacement Parts List” (Section 22), if necessary.
Warning :-
This product uses a laser diode. Refer to caution statement Precaution of Laser Diode.
Caution:
After replacing of CD Changer Unit, ageing test is necessary. Please confirm operation for CD Changer Unit.
·
Disassembly of Top Cabinet
·
Disassembly of Rear Panel
·
Disassembly of CD Changer Unit
·
Disassembly of Main P.C.B.
·
Disassembly of Transformer P.C.B.
·
Disassembly of Power P.C.B.
·
Disassembly of Front Panel Unit
·
Disassembly of Panel P.C.B.
·
Disassembly of Deck Mechanism Unit
·
Disassembly for Deck P.C.B.
·
Disassembly of Traverse Unit
·
Disassembly of Optical Pickup Unit (CD Mechanism)
·
Disassembly of Deck Mechanism
·
Replacement for cassette lid
·
Rectification for tape jam problem
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SA-AK340E / SA-AK340EB / SA-AK340EG
10.2. Disassembly flow chart
The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the
servicing.
To assemble the unit, reverse the steps shown in the chart as below.
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SA-AK340E / SA-AK340EB / SA-AK340EG
10.3. Main Parts Location
24
SA-AK340E / SA-AK340EB / SA-AK340EG
Step 1 Remove 3 screws at each side and 5 screws at rear
panel.
Step 2 Lift up both sides of the top cabinet, push the top
cabinet towards the rear to remove the top cabinet.
Step 1 Remove 5 screws.
Step 2 Disconnect cable CN2810 (Fan) at Main P.C.B..
Step 3 Remove rear panel.
Step 1 Remove 1 screw at rear panel.
10.4. Disassembly of Top Cabinet
10.5. Disassembly of Rear Panel
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
10.6. Disassembly of CD Changer Unit (CRS1)
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
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SA-AK340E / SA-AK340EB / SA-AK340EG
Step 2 Detach the FFC cables (CN2801 & CN2805).
Step 3 Release the claws on both ends.
Step 4 Lift the CD changer unit upwards to remove it.
·
Disassembly of Mecha Chassis
Step 5 Remove 2 screws.
Step 6 Remove the Mecha Chassis.
Note:
For disassembly & assembly of traverse unit, please refer to
section 10.14 of this service manual.Please refer to original
Service Manual for the Disassembly and Assembly of the CD
Changer Unit (CRS1).
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SA-AK340E / SA-AK340EB / SA-AK340EG
10.7. Disassembly of Main P.C.B.
Step 1 Disconnect FFC cables (CN2803, CN2806 and
CN2951).
Step 1 Disconnect connectors (CN5950 & CN5951).
Step 2 Remove 3 screws (Mounting screws for transformer to
bottom chassis).
Step 3 Push the Transformer P.C.B. sidewards to remove it.
Step 2 Detach connectors (CN2808 & CN2809).
Step 3 Remove Main P.C.B..
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
·
Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit
·
Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel
10.8. Disassembly of Transformer P.C.B.
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
·
Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel
·
Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit
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SA-AK340E / SA-AK340EB / SA-AK340EG
Step 1 Remove the 5 screws on Power P.C.B..
Step 2 Detach cable (CN5950) remove the 5 screws on Power
P.C.B..
Step 3 Remove Power P.C.B..
Note:
Insulate the Power P.C.B. with insulation material to avoid short
circuit.
·
Replacement of the Power Amp IC or Voltage Regulator
Step 4 Remove 2 screws at the Power Amp IC and/or 3
screws to Voltage Regulator.
Step 5 Cut the joints with a metal cutter as shown below.
Step 6 Desolder the terminals to replace the components.
Step 7 Fix back the cut portion with a screw as shown.
10.9. Disassembly of Power P.C.B.
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
·
Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit
·
Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel
·
Follow the (Step 1) - (Step 3) of Item 10.7 - Disassembly of Main P.C.B.
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SA-AK340E / SA-AK340EB / SA-AK340EG
Step 1 Disconnect connectors (CN2803, CN2806, CN2951,
CN5950 & CN5951).
Step 2 Bent the front panel unit slightly forward as arrow
shown.
Step 1 Remove the volume knob.
Step 3 Release 2 claws outwards.
Step 4 Remove the front panel unit.
Note: Ensure 2 claws located at the bottom chassis is seated
into the 2 slots at bottom of front panel at 2 catches (one on
each side) of bottom chassis to be aligned to front panel’s slot.
Assembly is secured upon hearing clicking sound.
10.10. Disassembly of Front Panel Unit
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
·
Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit
10.11. Disassembly for Panel P.C.B.
·
Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet
·
Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit
·
Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit
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SA-AK340E / SA-AK340EB / SA-AK340EG
Step 2 Remove 11 screws.
Step 3 Release 2 catches.
Step 4 Remove Panel P.C.B..
10.11.1. Disass embly of Lid
Step 1 Lift the spring sideward.
Step 2 Remove Lid.
Note: Do not misplace the spring.
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SA-AK340E / SA-AK340EB / SA-AK340EG
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