ORDER NO. MD0412577C3
CD Stereo System
SA-AK230GC
SA-AK230GN
Colour
(S)... Silver Type
Specifications
n AMPLIFIER SECTION |
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Phone jack |
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RMS output power |
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Terminal |
Stereo, 3.5 mm jack |
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THD 10%, both channels driven |
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n CASSETTE DECK SECTION |
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1 kHz |
100 W per channel (5 Ω) |
Track system |
4 track, 2 channel |
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Total RMS power |
200 W |
Heads |
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For GC only |
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Record/playback |
Solid permalloy head |
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PMPO |
2000 W |
Erasure |
Double gap ferrite head |
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n FM/AM TUNER, TERMINALS SECTION |
Motor |
DC servo motor |
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Preset station |
FM 15 stations |
Recording system |
AC bias 100 kHz |
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AM 15 stations |
Erasing system |
AC erase 100 kHz |
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Frequency Modulation (FM) |
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Tape speed |
4.8 cm/s |
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Frequency range |
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Overall frequency response (+3 dB, -6 dB at DECK OUT) |
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87.50 - 108.00 MHz (50 kHz steps) |
NORMAL |
35 Hz - 14 kHz |
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Sensitivity |
2.5 µV (IHF) |
S/N |
50 dB (A weighted) |
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S/N 26 dB |
2.2 µV |
Wow and flutter |
0.18 % (WRMS) |
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Antenna terminal(s) |
75 Ω (unbalanced) |
Fast forward and rewind time |
Approx. 120 seconds with |
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Amplitude Modulation (AM) |
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C-60 cassette tape |
Frequency range |
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n DISC SECTION |
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For GC only |
522 - 1629 kHz (9 kHz steps) |
Discs played [8 cm or 12 cm] |
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520 - 1630 kHz (10 kHz steps) |
(1) CD-Audio (CD-DA) |
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For GN only |
522 - 1629 kHz (9 kHz steps) |
(2) CD-R/RW (CD-DA, MP3 formatted discs) |
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Sensitivity |
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(3) MP3 |
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S/N 20 dB (at 999 kHz) |
560 µV/m |
Bit rate |
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Audio performance (Amplifier) |
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MP3 |
32 kbps - 320 kbps |
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Input sensitivity/Input impedance |
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Sampling frequency |
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Aux |
250 mV,14.7 kΩ |
MP3 |
32 kHz, 44.1 kHz, 48 kHz |
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© 2004 Matsushita Electric Industrial Co. Ltd.. All |
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rights reserved. |
Unauthorized copying and |
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distribution is a violation of law. |
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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 |
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n SYSTEM |
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Wavelength |
780 nm |
SC-AK230 (GC) |
Music center: SA-AK230 (GC) |
Beam Source |
Semiconductor laser |
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Speaker: SB-AK230 (GC) |
Audio output (Disc) |
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SC-AK230 (GN) |
Music center: SA-AK230 (GN) |
Number of channels |
2 (Stereo) (FL,FR) |
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Speaker: SB-AK230 (GC) |
n GENERAL |
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Notes: |
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Power Supply |
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For GC only |
AC 220 - 240 V, 50/60 Hz |
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For GN only |
AC 230 - 240 V, 50 Hz |
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Power consumption |
174 |
W |
Power consumption in standby |
0.7 |
W |
mode |
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1.Specifications are subject to change without notice. Mass and dimensions are approximate.
2.Total harmonic distortion is measured by the digital spectrum analyzer.
CONTENTS
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Page |
1 |
Before Repair and Adjustment |
4 |
2 |
Protection Circuitry |
4 |
3 |
Prevention of Electro Static Discharge (ESD) to |
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Electrostatically Sensitive (ES) Devices |
5 |
4 |
Handling the Lead-free Solder |
5 |
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4.1. About lead free solder (PbF) |
5 |
5 |
Handling Precautions For Traverse Deck |
6 |
6 |
Precaution of Laser Diode |
7 |
7 |
Accessories |
8 |
8 |
Operation Procedures |
9 |
9 |
Disassembly and Assembly of Main Component |
11 |
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9.1. Disassembly flow chart |
11 |
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9.2. Gear for servicing (jig) Information |
12 |
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9.3. Disassembly of Top Cabinet |
13 |
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9.4. Disassembly of CD Lid |
13 |
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9.5. Disassembly of Rear Panel |
15 |
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9.6. Disassembly of CD Mechanism Unit |
15 |
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9.7. Disassembly of Main P.C.B. |
16 |
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9.8. Disassembly of Power P.C.B. |
16 |
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9.9. Disassembly of Transformer P.C.B. |
17 |
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9.10. Disassembly of Front Panel Unit |
18 |
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9.11. Disassembly of Deck Mechanism Unit |
18 |
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9.12. CD Mechanism Main Component Replacement |
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Procedures |
19 |
9.13.Replacement for the pinch roller ass and head block 32
9.14.Replacement for the Deck motor ass , capstan belt A,
capstan belt B and winding belt |
33 |
9.15. Replacement for the cassette lid ass |
36 |
9.16. Rectification for tape jam problem |
37 |
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Page |
10 |
Checking for major P.C.Bs |
38 |
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10.1. Checking of Main P.C.B. |
38 |
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10.2. Checking of Transformer P.C.B. |
39 |
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10.3. Checking of Panel, Deck & Deck Mechanism P.C.B. |
40 |
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10.4. Checking of Power P.C.B. |
41 |
11 |
Self-Diagnostic Function |
42 |
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11.1. Self-diagnostic display |
42 |
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11.2. How to enter the Self-Diagnostic Function |
42 |
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11.3. Cassette Mechanism Test (For error code H01, H02, H03, |
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F01) |
42 |
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11.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29, |
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F30, H15 & H16) |
42 |
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11.5. To clear all Error code |
43 |
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11.6. To exit from Self-Diagnostic function |
43 |
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11.7. Power Amplifier Failure (F61) |
43 |
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11.8. Description of Error Code |
43 |
12 |
CD Test Mode Function |
45 |
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12.1. How to set CD test mode |
45 |
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12.2. CD Automatically Adjustment result indication |
45 |
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12.3. CD Mecha Aging Test Mode (CR20) |
45 |
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12.4. Micon ROM Checksum and Version Display Mode |
46 |
13 |
Measurements and Adjustments |
47 |
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13.1. Cassette Deck Section |
47 |
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13.2. Tuner Section |
47 |
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13.3. Alignment Points |
48 |
14 |
Block Diagram |
49 |
15 |
Voltage Measurement |
56 |
16 |
Schematic Diagram |
58 |
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16.1. (A) CD Servo Circuit |
59 |
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SA-AK230GC / SA-AK230GN |
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16.2. (B) Main (Tuner) Circuit |
61 |
18 |
Wiring Connection Diagram |
82 |
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16.3. (B) Main Circuit |
62 |
19 |
Illustration of IC , Transistors and Diodes |
83 |
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16.4. (C) Panel Circuit |
66 |
20 |
Terminal Function of IC |
84 |
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16.5. (D) Transformer Circuit, (E) CD Detect Circuit, (F) Spindle |
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20.1. IC7002 (MN6627953HB) Servo processor/ Digital signal |
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Position Circuit & (G) CD Loading Circuit |
68 |
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processor/ Digital filter/ D/A converter |
84 |
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16.6. (H) Power Circuit |
69 |
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20.2. IC7003 (AN8739SBTE2) Focus coil/ Tracking coil/ |
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16.7. (I) Deck Circuit & (J) Deck Mechanism Circuit |
70 |
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Traverse motor/ Spindle motor drive |
84 |
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17 Printed Circuit Board |
72 |
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20.3. IC2801 (C2CBJG000565) System Microprocessor |
85 |
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17.1. (A) CD Servo P.C.B. |
72 |
21 |
Troubleshooting Guide |
87 |
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17.2. (B) Main P.C.B. |
73 |
22 |
Parts Location and Replacement Parts List |
88 |
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17.3. (C) Panel P.C.B. |
75 |
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22.1. Deck Mechanism (RAA4502-S) |
89 |
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17.4. (D) Transformer P.C.B. |
77 |
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22.2. CD Loading Mechanism (RD-DAC026-S) |
92 |
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17.5. (E) CD Detect P.C.B., (F) Spindle Position P.C.B., (G) CD |
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22.3. Cabinet |
95 |
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Loading P.C.B. & (K) Tuner Pack P.C.B. |
78 |
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22.4. Electrical Parts List |
97 |
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17.6. (H) Power P.C.B. |
79 |
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22.5. Packing Materials & Accessories Parts List |
104 |
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17.7. (I) Deck P.C.B. & (J) Deck Mechanism P.C.B. |
81 |
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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 10Ω, 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.
5
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.
6
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
7
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
9
SA-AK230GC / SA-AK230GN
10
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.
12
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 |
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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 screw to Voltage Regulator.
Step 3 Unsolder the terminals of Power Amp IC, transistor and 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 the front panel ass’y forward.
Step 3 Remove volume knob.
· Disassembly of Panel P.C.B.
Step 4 Remove 10 screws.
Step 5 Disconnect connectors (CN2806, CN2803 and CN5950).
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 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 8 Remove 3 screws.
Step 9 Unsolder the motor terminals (4 points).
Step 10 Remove the FFC board from the connector, and then remove the CD Servo P.C.B.
Step 11 Remove the pin.
Step 12 Release the claw, and then remove the traverse deck ass’y.
20
Note:
Be careful not to lose the 3 floating spring because those will also be removed on removal of the traverse deck ass’y.
· 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.
· Note for installation of the CD servo P.C.B.
· Installation for traverse deck ass’y
SA-AK230GC / SA-AK230GN
Step 1 Install the traverse deck ass’y to the timing lever.
Step 2 Align the boss of traverse deck ass’y with the slot of traverse cam gear.
Step 3 Force the claw of timing lever.
Step 4 Force the disc tray fully.
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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. |
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Step 4 With lifting the claw in the direction of (1), draw the CD |
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Detect P.C.B. in the direction of arrow (2). |
Step 5 Remove the mechanism cover. |
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22
SA-AK230GC / SA-AK230GN
Step 6 Insert the gear with hexagonal wrench into the hole.
Step 7 Rotate the hexagonal wrench in the direction of arrow, and then open the disc tray fully.
Step 8 Release the both claws, and then draw the disc tray.
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 1 Slide the drive rack fully in the direction of arrow.
Step 2 Holding the drive rack not to move, install the disc tray. Step 3 Align the drive rack with the drive gear.
23
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 2 Release the claw, and then remove the gear holder. Step 3 Remove the belt and change gear spring.
Step 5 Release the 2 claws, and then remove the bottom SW P.C.B..
NOTE:
Take care not to lose the change gear spring.
Step 4 Remove the pulley gear, change gear and UP/DOWN gear.
24
SA-AK230GC / SA-AK230GN
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 9 Pressing the claw (B) in the direction of arrow (1), force the connection lever in the direction of arrow (2).
Step 10 Move the slide plate 1 to the end of stock side.
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SA-AK230GC / SA-AK230GN
Step 11 Lift up the left end of spindle base unit in the direction of arrow (1), and then remove the unit in the direction of arrow
(2).
Step 12 Remove slide plate 1 and slide plate 2.
Step 13 Remove the traverse relay gear, traverse cam gear and drive gear.
[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.
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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:
Take care not to lose the disc lever spring.
Step 4 Release the 2 claws, and then draw the relay gear B. Step 5 Release the 2 claws as shown below.
NOTE:
Hold the loading stopper ass’y manually bacause it is flipped by spring.
Step 6 Remove the cushion spring.
Step 7 Remove the loading stopper ass’y in the direction of arrow.
27
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 10 Remove the lower spindle spring with tweezers. Step 11 Force the lower hook with thin tip of minus screwdriver.
Step 12 Squeeze the shaft of lower hook, and then draw it.
Step 13 Rotate the lower spindle in the direction of arrow until the lower spindle interferes with stopper.
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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spread the hold bars of loading stopper and remove the UP/DOWN base.
[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 Force the loading stopper ass’y, latch the claw firmly.
[Reassembly for mechanism base drive unit]
SA-AK230GC / SA-AK230GN
Step 1 Install the traverse cam gear.
Step 2 Rotate the traverse cam gear to the direction of arrow.
Step 3 Install the drive gear and traverse relay gear.
*When installing the traverse relay gear, align the trapezoid tooth of gear with tooth of traverse cam gear.
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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 then match to the connection leve and align the trapezoid tooth of traverse relay gear with the slide plate 1.
Step 6 Install the spindle base unit. (First, slide plate 1.)
Step 7 Move the slide plate 1 to forward fully.
Step 8 Install the rear lock. (The claw should be latched.)
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.)
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