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ORDER NO. MD0412577C3
CD Stereo System
SA-AK230GC
SA-AK230GN
Colour
(S)... Silver Type
Specifications
n AMPLIFIER SECTION Phone jack
RMS output power Terminal Stereo, 3.5 mm jack
THD 10%, both channels driven n CASSETTE DECK SECTION
1 kHz 100 W per channel (5 ) Track system 4 track, 2 channel
Total RMS power 200 W Heads
For GC only Record/playback Solid permalloy head
PMPO 2000 W Erasure Double gap ferrite head
n FM/AM TUNER, TERMINALS SECTION Motor DC servo motor
Preset station FM 15 stations Recording system AC bias 100 kHz
AM 15 stations Erasing system AC erase 100 kHz
Frequency Modulation (FM) Tape speed 4.8 cm/s
Frequency range Overall frequency response (+3 dB, -6 dB at DECK OUT)
87.50 - 108.00 MHz (50 kHz steps) NORMAL 35 Hz - 14 kHz
Sensitivity 2.5 µV (IHF) S/N 50 dB (A weighted)
S/N 26 dB 2.2 µV Wow and flutter 0.18 % (WRMS)
Antenna terminal(s) 75 (unbalanced) Fast forward and rewind time Approx. 120 seconds with
Amplitude Modulation (AM) C-60 cassette tape
Frequency range n DISC SECTION
For GC only 522 - 1629 kHz (9 kHz steps) Discs played [8 cm or 12 cm]
520 - 1630 kHz (10 kHz steps) (1) CD-Audio (CD-DA)
For GN only 522 - 1629 kHz (9 kHz steps) (2) CD-R/RW (CD-DA, MP3 formatted discs)
Sensitivity (3) MP3
S/N 20 dB (at 999 kHz) 560 µV/m Bit rate
Audio performance (Amplifier) MP3 32 kbps - 320 kbps
Input sensitivity/Input impedance Sampling frequency
Aux 250 mV,14.7 k MP3 32 kHz, 44.1 kHz, 48 kHz
© 2004 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-AK230GC / SA-AK230GN
CD 44.1 kHz Dimensions (W x H x D) 250 x 330 x 341 mm
Decoding 16 bit linear Mass 6.9 kg
Digital filter 8 fs Operating temperature range +5 to +35°C
D/A converter MASH (1 bit DAC) Operating humidity range 5 to 90% RH (no condensation)
Pickup n SYSTEM
Wavelength 780 nm SC-AK230 (GC) Music center: SA-AK230 (GC)
Beam Source Semiconductor laser Speaker: SB-AK230 (GC)
Audio output (Disc) SC-AK230 (GN) Music center: SA-AK230 (GN)
Number of channels 2 (Stereo) (FL,FR) Speaker: SB-AK230 (GC)
n GENERAL Notes:
Power Supply 1. Specifications are subject to change without notice. Mass and
For GC only AC 220 - 240 V, 50/60 Hz dimensions are approximate.
For GN only AC 230 - 240 V, 50 Hz 2. Total harmonic distortion is measured by the digital spectrum
analyzer.
Power consumption 174 W
Power consumption in standby 0.7 W
mode
CONTENTS
Page Page
1 Before Repair and Adjustment 4 10 Checking for major P.C.Bs 38
2 Protection Circuitry 4 10.1. Checking of Main P.C.B. 38
3 Prevention of Electro Static Discharge (ESD) to 10.2. Checking of Transformer P.C.B. 39
Electrostatically Sensitive (ES) Devices 5 10.3. Checking of Panel, Deck & Deck Mechanism P.C.B. 40
4 Handling the Lead-free Solder 5 10.4. Checking of Power P.C.B. 41
4.1. About lead free solder (PbF) 5 11 Self-Diagnostic Function 42
5 Handling Precautions For Traverse Deck 6 11.1. Self-diagnostic display 42
6 Precaution of Laser Diode 7 11.2. How to enter the Self-Diagnostic Function 42
7 Accessories 8 11.3. Cassette Mechanism Test (For error code H01, H02, H03,
8 Operation Procedures 9 F01) 42
9 Disassembly and Assembly of Main Component 11 11.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29,
9.1. Disassembly flow chart 11 F30, H15 & H16) 42
9.2. Gear for servicing (jig) Information 12 11.5. To clear all Error code 43
9.3. Disassembly of Top Cabinet 13 11.6. To exit from Self-Diagnostic function 43
9.4. Disassembly of CD Lid 13 11.7. Power Amplifier Failure (F61) 43
9.5. Disassembly of Rear Panel 15 11.8. Description of Error Code 43
9.6. Disassembly of CD Mechanism Unit 15 12 CD Test Mode Function 45
9.7. Disassembly of Main P.C.B. 16 12.1. How to set CD test mode 45
9.8. Disassembly of Power P.C.B. 16 12.2. CD Automatically Adjustment result indication 45
9.9. Disassembly of Transformer P.C.B. 17 12.3. CD Mecha Aging Test Mode (CR20) 45
9.10. Disassembly of Front Panel Unit 18 12.4. Micon ROM Checksum and Version Display Mode 46
9.11. Disassembly of Deck Mechanism Unit 18 13 Measurements and Adjustments 47
9.12. CD Mechanism Main Component Replacement 13.1. Cassette Deck Section 47
Procedures 19 13.2. Tuner Section 47
9.13. Replacement for the pinch roller ass and head block 32 13.3. Alignment Points 48
9.14. Replacement for the Deck motor ass , capstan belt A, 14 Block Diagram 49
capstan belt B and winding belt 33 15 Voltage Measurement 56
9.15. Replacement for the cassette lid ass 36 16 Schematic Diagram 58
9.16. Rectification for tape jam problem 37 16.1. (A) CD Servo Circuit 59
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SA-AK230GC / SA-AK230GN
16.2. (B) Main (Tuner) Circuit 61 18 Wiring Connection Diagram 82
16.3. (B) Main Circuit 62 19 Illustration of IC , Transistors and Diodes 83
16.4. (C) Panel Circuit 66 20 Terminal Function of IC 84
16.5. (D) Transformer Circuit, (E) CD Detect Circuit, (F) Spindle 20.1. IC7002 (MN6627953HB) Servo processor/ Digital signal
Position Circuit & (G) CD Loading Circuit 68 processor/ Digital filter/ D/A converter 84
16.6. (H) Power Circuit 69 20.2. IC7003 (AN8739SBTE2) Focus coil/ Tracking coil/
16.7. (I) Deck Circuit & (J) Deck Mechanism Circuit 70 Traverse motor/ Spindle motor drive 84
17 Printed Circuit Board 72 20.3. IC2801 (C2CBJG000565) System Microprocessor 85
17.1. (A) CD Servo P.C.B. 72 21 Troubleshooting Guide 87
17.2. (B) Main P.C.B. 73 22 Parts Location and Replacement Parts List 88
17.3. (C) Panel P.C.B. 75 22.1. Deck Mechanism (RAA4502-S) 89
17.4. (D) Transformer P.C.B. 77 22.2. CD Loading Mechanism (RD-DAC026-S) 92
17.5. (E) CD Detect P.C.B., (F) Spindle Position P.C.B., (G) CD 22.3. Cabinet 95
Loading P.C.B. & (K) Tuner Pack P.C.B. 78 22.4. Electrical Parts List 97
17.6. (H) Power P.C.B. 79 22.5. Packing Materials & Accessories Parts List 104
17.7. (I) Deck P.C.B. & (J) Deck Mechanism P.C.B. 81 22.6. Packaging 105
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SA-AK230GC / SA-AK230GN
1 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C5820 and C5840 through a 10, 5W 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.
For GC only
Current consumption at AC 220-240V, 50/60 Hz in NO SIGNAL mode (volume min at CD mode) should be ~350mA.
For GN only
Current consumption at AC 230-240V, 50 Hz in NO SIGNAL mode (volume min at CD mode) should be ~350mA.
2 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.
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SA-AK230GC / SA-AK230GN
3 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-equipped 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 equipped 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).
4 Handling the Lead-free Solder
4.1. 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.
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SA-AK230GC / SA-AK230GN
5 Handling Precautions For Traverse Deck
The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of
clothes or human body.
So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
· Handling of 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. Take care 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 (laser power adjustment). It has already been adjusted.
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.
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SA-AK230GC / SA-AK230GN
6 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.
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.
n Use of Caution Labels
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SA-AK230GC / SA-AK230GN
7 Accessories
Remote Control
FM Antenna
AC Cord (For GN only)
AC Cord (For GC only)
AM Loop Antenna
8
SA-AK230GC / SA-AK230GN
8 Operation Procedures
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SA-AK230GC / SA-AK230GN
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SA-AK230GC / SA-AK230GN
9 Disassembly and Assembly of Main Component
"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.
9.1. 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-AK230GC / SA-AK230GN
9.2. Gear for servicing (jig) Information
1. This unit has a gear which is used for checking items (Open/Close of disc tray, up/down operation of traverse unit by manually)
when servicing.
2. For preparation of gear (for servicing), perform the procedures as follows.
3. In case of re-servicing the same set, the "gear for servicing" may has been taken off because it has been used. The "gear for
servicing" must be stored.
· Remove the gear provided with mecha cover as shown below.
· Insert the hexagonal screwdriver (2mm) into the gear, and then project the tip of screwdriver for 1~ 2 mm in length.
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SA-AK230GC / SA-AK230GN
9.3. Disassembly of Top Cabinet
Step 1 Remove 2 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 and remove the top cabinet.
9.4. Disassembly of CD Lid
(The CD changer unit can be removed after the CD Lid is removed)
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Opening the disc tray automatically (Using Power
Supply)
Step 1 Connect the AC power cord.
Step 2 Press the POWER button to power up the main unit.
Step 4 Release the 2 claws, and then remove the CD Lid.
Step 5 Press the OPEN/CLOSE button, the disc tray will close.
Step 3 Press the OPEN/CLOSE button, the disc tray will open
automatically.
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SA-AK230GC / SA-AK230GN
Step 2 Release the 2 claws, and then remove the CD lid cover.
Step 6 Press the POWER button to turn the power off.
· [Opening the disc tray manually (Using service tools)]
Step 3 Repeat Step 2 but rotate the gear tools in anti-clockwise
direction.
Step 1 Insert the gear tool into the hole on the underside of CD
chassis and then rotate in the direction of arrow. The disc tray
will be opened.
Step 4 The disc tray will be closed.
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SA-AK230GC / SA-AK230GN
9.5. Disassembly of Rear Panel
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
Step 1 Remove 6 screws and disconnect wire CN2810 (Fan) at
rear cabinet as shown.
9.6. Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
Step 1 Remove one screw at rear panel.
Step 2 Detach the FFC wires (CN2801 & CN2805).
Step 4 Remove 4 screws.
Step 5 Remove the CD chassis.
Step 6 Lay the CD mechanism unit as shown.
· For disassembly of CD mechanism unit, please refer to
Section 9.12 of this manual.
Step 3 Release the claws of both ends, and then lift up the CD
Mechanism Unit.
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SA-AK230GC / SA-AK230GN
9.7. Disassembly of Main P.C.B.
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 9.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
Step 1 Disconnect FFC wires CN2803 & CN2806 from Main Step 2 Lift up Main P.C.B. by disconnecting connectors
P.C.B. CN5800 & CN5801 as arrow shown above.
9.8. Disassembly of Power P.C.B.
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 9.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 9.7 - Disassembly of Main P.C.B.
Step 1 Remove the 2 screws fixed at heat sink and 1 screw Note:
fixed at Power P.C.B.. Insulate the Power P.C.B. with insulation material to avoid short
circuit.
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SA-AK230GC / SA-AK230GN
· Replacement of the Power Amplifier IC/ Voltage Regulator
Step 1 Remove 2 screws fixed to the Power Amplifier IC and 1 Step 3 Unsolder the terminals of Power Amp IC, transistor and
screw to Voltage Regulator. replace the components.
Step 4 Fix back the cut portion with a screw as shown.
Step 2 Break the joint with a metal cutter as shown below.
9.9. Disassembly of Transformer P.C.B.
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 9.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
Step 1 Remove 3 screws, disconnect connector CN5950.
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SA-AK230GC / SA-AK230GN
9.10. Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 9.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
Step 1 Lay the unit as shown below.
Step 2 Release 2 claws at bottom and 2 claws each side, draw Step 4 Remove 10 screws.
the front panel ass'y forward.
Step 5 Disconnect connectors (CN2806, CN2803 and
Step 3 Remove volume knob. CN5950).
· Disassembly of Panel P.C.B.
9.11. Disassembly of Deck Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 3) of Item 9.10 - Disassembly of Front Panel Unit
Step 1 Detach FFC wire (CN971).
Step 2 Disconnect FFC flat cable from the connector
(CN1001).
Step 3 Remove the 5 screws.
Step 4 Push the lever upward, and then open the cassette lid
ass'y (For DECK1 and DECK2).
Step 5 Tilt the cassette mechanism unit in the direction of
arrow (1), and then remove it in the direction of arrow (2).
· For replacement of Deck Mechanism P.C.B.
Step 6 Remove 3 screws.
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SA-AK230GC / SA-AK230GN
Step 7 Unsolder the motor terminals.
Step 8 Remove Deck Mechanism P.C.B.
9.12. CD Mechanism Main Component Replacement Procedures
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) - (Step 6) of Item 9.6 - Disassembly of CD Mechanism Unit
9.12.1. Replacement of the Traverse Deck
Step 1 Remove the CD changer unit.
Step 2 Insert the gear with hexagonal wrench into the hole.
Step 4 With pressing the claw (A), rotate the hexagonal wrench
clockwise. (The slide plate R moves for a little amount.)
Step 5 Pressing the claw (B) in the direction of arrow (1), the
connection lever moves in the direction of arrow (2).
Step 3 Rotate the hexagonal wrench in the direction of arrow
(clockwise), and then open the disc tray fully.
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SA-AK230GC / SA-AK230GN
Step 6 Lift up the traverse deck ass'y.
Step 10 Remove the FFC board from the connector, and then
remove the CD Servo P.C.B.
Step 7 Remove the traverse deck ass'y from the timing lever.
Caution:
When removing or inserting the traverse deck avoid touching
the OPU lens and pressing onto the turntable.
Step 11 Remove the pin.
Step 8 Remove 3 screws.
Step 9 Unsolder the motor terminals (4 points).
Step 12 Release the claw, and then remove the traverse deck
ass'y.
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SA-AK230GC / SA-AK230GN
Note: Step 1 Install the traverse deck ass'y to the timing lever.
Be careful not to lose the 3 floating spring because those will Step 2 Align the boss of traverse deck ass'y with the slot of
also be removed on removal of the traverse deck ass'y. traverse cam gear.
· Installation of the CD Servo P.C.B. after replacement
Step 1 Connect the FFC board.
Step 2 Install the CD servo P.C.B. in the traverse deck ass'y.
Step 3 Remove 3 screws.
Step 4 Solder.
Step 3 Force the claw of timing lever.
· Note for installation of the CD servo P.C.B.
Step 4 Force the disc tray fully.
· Installation for traverse deck ass'y
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SA-AK230GC / SA-AK230GN
Step 5 With pressing the claw (B) in the direction of arrow (1),
force the connection lever in the direction of arrow (2).
9.12.2. Replacement for the Disc Tray
Step 1 Remove 4 screws.
Step 2 Remove the upper plate.
Step 3 Remove 3 screws.
Step 4 With lifting the claw in the direction of (1), draw the CD
Detect P.C.B. in the direction of arrow (2).
Step 5 Remove the mechanism cover.
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SA-AK230GC / SA-AK230GN
Step 6 Insert the gear with hexagonal wrench into the hole.
Step 9 With forcing the left guide bar manually because the left
guide bar interfers with claw, draw the disc tray.
[Installation of the disc tray after replacement]
Step 7 Rotate the hexagonal wrench in the direction of arrow,
and then open the disc tray fully.
Step 1 Slide the drive rack fully in the direction of arrow.
Step 8 Release the both claws, and then draw the disc tray.
Step 2 Holding the drive rack not to move, install the disc tray.
Step 3 Align the drive rack with the drive gear.
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SA-AK230GC / SA-AK230GN
NOTE:
Force the right guide bar of tray base manually not to move
upwards.
Step 4 Holding the disc tray manually, push the disc tray in the
direction of the arrow.
9.12.3. Disassembly and reassembly for mechanism base drive unit
Step 1 Remove 3 screws.
Step 5 Release the 2 claws, and then remove the bottom SW
Step 2 Release the claw, and then remove the gear holder.
P.C.B..
Step 3 Remove the belt and change gear spring.
NOTE:
Take care not to lose the change gear spring.
Step 4 Remove the pulley gear, change gear and UP/DOWN
gear.
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SA-AK230GC / SA-AK230GN
Step 9 Pressing the claw (B) in the direction of arrow (1), force
the connection lever in the direction of arrow (2).
Step 6 Install the tray lock spring to hook temporary.
Step 7 Release the claw, and then remove the tray lock.
Step 8 Release the claw, and then remove the rear lock.
Step 10 Move the slide plate 1 to the end of stock side.
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SA-AK230GC / SA-AK230GN
Step 13 Remove the traverse relay gear, traverse cam gear
Step 11 Lift up the left end of spindle base unit in the direction and drive gear.
of arrow (1), and then remove the unit in the direction of arrow
(2).
[Dissassembly/reassembly for the spindle base unit]
Step 1 Draw the 5 disc spacers.
Step 2 Pushing the claw, slide the support plate in the direction
of arrow, and then remove it.
Step 12 Remove slide plate 1 and slide plate 2.
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SA-AK230GC / SA-AK230GN
Step 3 Rotate the disc lever in the direction of arrow (1), draw
the disc lever.
NOTE:
Hold the loading stopper ass'y manually bacause it is flipped by
spring.
NOTE:
Take care not to lose the disc lever spring.
Step 6 Remove the cushion spring.
Step 7 Remove the loading stopper ass'y in the direction of
arrow.
Step 4 Release the 2 claws, and then draw the relay gear B.
Step 5 Release the 2 claws as shown below.
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SA-AK230GC / SA-AK230GN
Step 8 Release the 2 claws, and then remove the relay gear A.
Step 9 Release the 2 claws, and then remove the spindle shaft.
Step 12 Squeeze the shaft of lower hook, and then draw it.
Step 13 Rotate the lower spindle in the direction of arrow until
Step 10 Remove the lower spindle spring with tweezers.
the lower spindle interferes with stopper.
Step 11 Force the lower hook with thin tip of minus screwdriver.
Step 14 Insert the thin tip of minus screwdriver between the
lower spindle and UP/DOWN base, and then slacken the lower
spindle to release the stopper. Then, rotate the lower spindle
and remove it.
Step 15 Rotate the UP/DOWN base at a 90° angle. Then,
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SA-AK230GC / SA-AK230GN
spread the hold bars of loading stopper and remove the Step 1 Install the traverse cam gear.
UP/DOWN base. Step 2 Rotate the traverse cam gear to the direction of arrow.
[Installation for loading stopper ass'y]
Step 1 Align the claw of loading stoppers ass'y with the slot of
spindle base. (Caution should be exercised when alignment of
claw due to the size of claws.)
Step 2 Lower the loading stopper ass'y, and then align the
lower spindle with the trapezoid tooth of relay gear A.
Step 3 Install the drive gear and traverse relay gear.
Step 3 Force the loading stopper ass'y, latch the claw firmly.
*When installing the traverse relay gear, align the trapezoid
tooth of gear with tooth of traverse cam gear.
[Reassembly for mechanism base drive unit]
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SA-AK230GC / SA-AK230GN
Step 4 Install the slide plate 2 to the mechanism base, and
then match to the connection lever.
Step 5 Install the slide plate 1 to the mechanism base, and Step 7 Move the slide plate 1 to forward fully.
then match to the connection leve and align the trapezoid tooth Step 8 Install the rear lock. (The claw should be latched.)
of traverse relay gear with the slide plate 1. Step 9 Install the Spindle Position P.C.B.. (The claw should be
latched.)
Step 10 Install the tray lock. (The claw should be latched.)
Step 6 Install the spindle base unit. (First, slide plate 1.)
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SA-AK230GC / SA-AK230GN
Step 13 Install the gear holder, and then tighten the screw (a).
Step 11 Remove the tray lock spring from hook,and then latch
to the tray lock.
Step 12 Install the UP/DOWN gear, change gear, change gear
spring, pulley gear and belt in the order of (1) - (5).
Step 14 Install the tray base, traverse ass'y, mechanism cover
and upper plate.
[Operation check after servicing]
Check the proper operation of following items with gear and
hexagonal screwdriver.
1. Open/close of tray base.
2. Moving the tray base to the stock side.
3. UP/DOWN operation of spindle base unit.
4. UP/DOWN operation of traverse ass'y.
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SA-AK230GC / SA-AK230GN
9.12.4. Replacement for the motor ass'y
Step 1 Install the belt temporarily.
NOTE:
Take care not apply the grease to the belt.
Step 2 Upset the CD loading unit. Step 6 Release the 2 claws (A), and then remove the Motor
P.C.B.
Step 3 Remove 3 screws.
Step 7 Release the claw (B), and then remove the motor ass'y.
[Notice for motor ass'y installation]
1. Locate the name plate of motor to the traverse ass'y.
2. Align the hole of motor with the ribs.
Step 4 Unsolder the plunger terminals (2 points).
Step 5 Unsolder the motor terminals (2 points).
9.13. Replacement for the pinch roller ass'y and head block
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 3) of Item 9.10 - Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 5) of Item 9.11 - Disassembly of Deck Mechanism Unit
* The mechanism as shown below is for DECK1. For DECK
2, perform the same procedures.
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SA-AK230GC / SA-AK230GN
Step 1 Release the 2 claws, and then remove the pinch roller
(R), (F).
Step 2 Release the 2 claws, and then remove the head
connector.
Step 3 Remove 2 screws.
9.14. Replacement for the Deck motor ass'y, capstan belt A, capstan belt B
and winding belt
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 9.4 - Disassembly of CD Lid
· Follow the (Step 1) - (Step 3) of Item 9.6 - Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 3) of Item 9.10 - Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 5) of Item 9.11 - Disassembly of Deck Mechanism Unit
Step 1 Release the 2 claws, and then remove the head
connector.
Step 2 De-solder plunger point.
Step 3 Remove the Deck Mechanism P.C.B.
Step 4 Remove 3 screws.
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SA-AK230GC / SA-AK230GN
Step 5 Remove the flywheel R.
Step 6 Release the claw of tape side, and then remove the
winding lever and spring.
Step 7 Remove the flywheel F.
[Installation of the belt]
Step 1 The boss and marking should be positioned Step 2 Put the winding belt on the pulley temporarily.
horizontally. Step 3 Install the flywheel F.
Step 4 Put the winding belt on the flywheel F.
Step 5 Install the winding lever and spring while pressing the
winding arm in the direction of arrow.
Step 6 Install the flywheel R.
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SA-AK230GC / SA-AK230GN
Step 7 Put the capstan belt A temporarily as shown below.
Step 10 Remove 3 screws.
Step 11 Put the capstan belt B as shown below.
Step 8 Put the capstan belt B on the motor ass'y pulley.
Step 12 Put the capstan belt A on the motor ass'y pulley.
Step 9 Install the sub chassis to the mechanism, and then
tighten screws.
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SA-AK230GC / SA-AK230GN
9.15. Replacement for the cassette lid ass'y
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
Step 1 Lift up the lever upward, open the cassette lid ass'y.
(For DECK1 and DECK2)
Step 2 Push up the cassette lid ass'y in the direction of arrow.
(For DECK1 and DECK2).
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SA-AK230GC / SA-AK230GN
9.16. Rectification for tape jam problem
· Follow the (Step 1) - (Step 2) of Item 9.3 - Disassembly of Top Cabinet
Step 1 If a cassette tape cannot be removed from the deck (the
tape is caught by the capstan or pinch roller during playback or
recording), rotate the flywheel F in the direction of the arrow to
remove it.
Step 2 Push the lever upward and open the cassette lid ass'y.
Remove the cassette tape.
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SA-AK230GC / SA-AK230GN
10 Checking for major P.C.Bs
Note:
Checking of all major P.C.Bs (Main P.C.B., Panel P.C.B., Transformer P.C.B., Deck P.C.B., Deck Mechanism P.C.B. and Power
P.C.B.) can be carried out using below procedures.
For the disassembling procedures, refer to Section 9.
10.1. Checking of Main P.C.B.
1. Remove Top Cabinet and Rear Panel.
2. Remove CD Lid.
3. Disassemble CD Mechanism Unit.
4. Connect FFC wires (CN2801 & CN2805) from CD Mechanism Unit.
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SA-AK230GC / SA-AK230GN
10.2. Checking of Transformer P.C.B.
1. Remove Top Cabinet and Rear Panel.
2. Remove CD Lid.
3. Disassemble CD Mechanism Unit.
4. Connect FFC wires (CN2801 & CN2805) from CD Mechanism Unit.
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SA-AK230GC / SA-AK230GN
10.3. Checking of Panel, Deck & Deck Mechanism P.C.B.
1. Remove Top Cabinet.
2. Remove CD Lid.
3. Disassemble CD Mechanism Unit.
4. Remove volume knob at Front Panel Unit.
5. Disassemble Panel P.C.B.
6. Disassemble Deck Mechanism Unit.
7. Use the extension cable (A) to reconnect (CN1001) Deck P.C.B. and (CN2803) Main P.C.B.
8. Use the extension cable (B) to reconnect (CP6401) Panel P.C.B. and (CN971) Deck Mechanism P.C.B.
Service Tools
Extension FFC
(A) Deck P.C.B. - Main P.C.B. REEX0485 (14 Pins)
(B) Panel P.C.B. - Deck Mechanism P.C.B. REEX0484 (10 Pins)
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SA-AK230GC / SA-AK230GN
10.4. Checking of Power P.C.B.
1. Remove Top Cabinet and Rear Panel.
2. Remove CD Lid.
3. Disassemble CD Mechanism Unit.
4. Remove 3 screws at Transformer P.C.B..
5. Remove 2 screws at heat sink and 1 screw at Power P.C.B.
6. Flip the Power P.C.B.
7. Insulate the Power P.C.B. with insulation material to avoid short circuit.
8. Use the extension cable (A) to reconnect (CN1001) Deck P.C.B. and (CN2803) Main P.C.B.
9. Use the extension cable (B) to reconnect (CP6401) Panel P.C.B. and (CN971) Deck Mechanism P.C.B.
10. Use the extension cable (C) to reconnect (H5950/W5950) Power P.C.B. and (CN5950) Transformer P.C.B.
Service Tools
Extension FFC
(A) Deck P.C.B. - Main P.C.B. REEX0485 (14 Pins)
(B) Panel P.C.B. - Deck Mechanism P.C.B. REEX0484 (10 Pins)
(C) Power P.C.B. - Transformer P.C.B. RFKAK330 (9 Pins)
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SA-AK230GC / SA-AK230GN
11 Self-Diagnostic Function
11.1. Self-diagnostic display
This unit is equipped with a self-diagnostic display function which, will display an error code corresponding to the problem occuring.
Use this function when performing checking maintenance on the unit.
11.2. How to enter the Self-Diagnostic Function
11.3. Cassette Mechanism Test (For error code H01, H02, H03, F01)
1. Press "TAPE, DECK 1/2" to select Deck 2.
2. Load a cassette tape with the erasure prevention tab, remove from left side only and close the cassette holder.
3. Press "FAST FORWARD MEMORY" (Tape will be stop after 2 seconds)
4. Load a cassette tape with the erasure prevention tab, remove from right side only and close the cassette holder.
5. Press "REVERSE FM MODE/BP" (Tape will be stop after 2 seconds)
6. Load a pre-recorded tape with both side record tabs intact and close the cassette holder.
7. Press "PLAY/TUNE/TIME ADJ UP" (After TPS function, tape will stop automatically)
8. Press "REC/STOP" (Tape will not move)
9. Press "STOP/TUNE MODE" to indicate Error code.
· If several problem exist, error code will change each time when "n /STOP" is pressed.
(e.g. H01 H03 F01 .....etc.)
10. Press "TAPE, DECK 1/2" to select Deck 1.
11. Repeat step 2 to 9 to test Deck 1. (Tape Deck 1 will not check H02 because of no recording function)
11.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29, F30, H15 &
H16)
1. Press (set to CD Mode) on main unit.
2. Press "CD DIRECT PLAY (1)" and button on main unit.
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SA-AK230GC / SA-AK230GN
3. Press to close the tray.
4. Press "CD DIRECT PLAY (5)" and wait until the tray is open.
5. Press and remove the CD.
6. Press to close the tray.
7. Press "n/STOP" to indicate Error Code.
· If several problem exist, error code will change each time when "n/STOP" is pressed. (e.g. F15 F26 F16 ....etc).
11.5. To clear all Error code
1. Press and hold button for 5 seconds.
2. FL indicator shows "CLEAR" for 1 second and change to "T".
11.6. To exit from Self-Diagnostic function
1. Press button on main unit or remote control.
11.7. Power Amplifier Failure (F61)
1. When power amplifier fail, F61 will indicate automatically.
11.8. Description of Error Code
11.8.1. Abnormality detection for Deck Mechanism block
No. Abnormal Items Error Display Method of Detection
1 MODE SW abnormal H01 Normal operation during mecha transition, MODE SW abnormal is
memorized. The content of abnormality can be confirmed in the
abnormal detection mode explained in the later section.
2 REC INH SW abnormal H02 The content of abnormality can be confirmed in the abnormal detection
mode explained in the later section.
3 HALF SW abnormal H03 The content of abnormality can be confirmed in the abnormal detection
mode explained in the later section.
4 Reel pulse abnormal F01 The content of abnormality can be confirmed in the abnormal detection
mode explained in the later section.
11.8.2. Abnormality detection for CD/Changer block
No. Abnormal Items Error Display Method of Detection
1 REST SW abnormal F15 Under normal operation (Self-Diagnostic Mode inclusive), this error
occurs when the REST SW ON is not detected within the specified time
and shall be memorized.
2 Transmission error between CD servo F26 Under normal operation (Self-Diagnostic Mode inclusive), this error occurs
LSI and micon when the selection is set to CD and SENSE='H' is detected and
SENSE='L' is not detected within a fail safe time (20ms) after system
command transmission was sent.
3 CLAMP SW abnormal F16 Refer to section 11.8.4 (Mechanism Error Code Table) [M-0A] error is
detected.
4 BOTTOM SW abnormal F17 Refer to section 11.8.4 (Mechanism Error Code Table) [M-09] error is
detected.
5 POSITION SW abnormal F27 Refer to section 11.8.4 (Mechanism Error Code Table) [M-05 ~ M-08] error
is detected.
6 SW1 abnormal F28 Refer to section 11.8.4 (Mechanism Error Code Table) [M-02 ~ M-08] error
is detected.
7 SW2 abnormal F29 Refer to section 11.8.4 (Mechanism Error Code Table) [M-02 ~ M-08] error
is detected.
8 OPEN SW abnormal H15 Refer to section 11.8.4 (Mechanism Error Code Table) [M-01] error is
detected.
9 CLOSE SW abnormal H16 Refer to section 11.8.4 (Mechanism Error Code Table) [M-01] error is
detected.
10 DISC SENSOR F30 Refer to section 11.8.4 (Mechanism Error Code Table) [M-01] error is
detected.
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SA-AK230GC / SA-AK230GN
11.8.3. Power supply related error detection
No. Abnormal Items Error Display Method of Detection
1 POWER AMP output abnormal F61 During normal operation, if DCDET becomes `L', normal POWER OFF
process shall not be executed, PCNT shall be switched to `L'
immediately. GOODBYE shall not be displayed and the error display F61
will be displayed instead.
2 seconds after the F61 display, ECONO shall be set to `L' and FL
display shall be turned off.
The error content shall be memorized when the abnormality occurs and
can be displayed in the C-mecha self-diagnostic mode described later.
11.8.4. Error Code (CR20 Mechansim)
1. If mechanism problem occurs during normal or aging mode, the error code is "remembered" and shown on the FL display.
2. Reset Condition of Error Code
a. During cold start of micro-processor IC.
b. Restart of aging mode for the mechanism unit.
3. Mechanism Error Code
Mechansim Error Code Table
Error Code Description
M-00 No Error
M-01 OPEN Position - Horizontal Motion Abnormality at play position
M-02 PLAY Position - Horizontal Motion Abnormality at stock position
M-03 PLAY Position - Horizontal Motion Abnormality during changing
position
M-04 CHANGE Position - Horizontal Error of Stock position
M-05 CHANGE Position - Ascending motion Error
M-06 CHANGE Position - Descending motion Error
M-07 STOCK Position - Ascending motion Error
M-08 STOCK Position - Descending motion Error
M-09 Abnormality during change position (bottom switch)
M-0A Clamp Error
M-0B Access Failure - Access Time of more tha 30 secs (Total time
of automatic Read TOC Track access)
4. When the mechanism unit stops due to error during aging model, error code is remembered and counts of the errors are
displayed on the FL display.
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SA-AK230GC / SA-AK230GN
12 CD Test Mode Function
This CD test mode is provided to check CD unit without connecting to changer loading mechanism. This mode shall operate CD
PLAY with CD unit being connected only and CD Automatic Alignment result is shown on FL display.
12.1. How to set CD test mode
12.2. CD Automatically Adjustment result indication
Under CD test mode, pressing the numeric key `0' on the remote controller will display the auto adjustment result. FLO