Panasonic SA-AK220GCP Diagram

CD Stereo System

SA-AK220GCP

Colour

(S)... Silver Type

ORDER NO. MD0403067C3

Specifications

n AMPLIFIER SECTION

RMS Power output

THD 10%, both channels driven 1 kHz 80 W per channel (6 Ω)

Total Bi-Amp power 160 W per channel

Input sensitivity

UX 250 mV

Input Impedance

UX 13.3 kΩ

n FM TUNER SECTION

Frequency range

87.50 - 108.00 MHz (50 kHz steps)

Sensitivity 2.5µV (IHF)

S/N 26 dB 2.2 µV

ntenna terminal(s) 75 Ω (unbalanced)

n AM TUNER SECTION

Frequency range 522 - 1629 kHz (9 kHz steps)

520 - 1630 kHz (10 kHz steps)

Sensitivity

S/N 20 dB (at 999 kHz) 560 µV/m

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 dB, -6 dB at DECK OUT)

NORMAL (TYPE I) 35 Hz - 14 kHz

S/N 50 dB (A weighted)

Wow and flutter 0.18 % (WRMS)

Fast forward and rewind time Approx. 120 seconds with

C-60 cassette tape

n CD SECTION

Sampling frequency 44.1 kHz

Decoding 16 bit linear

Beam source/wavelength Semiconductor laser/780 nm

Number of channels Stereo

Frequency response 20 Hz - 20 kHz (+1, -2 dB)

Wow and flutter Below measurable limit

Digital filter 8fs

D/A converter MASH (1 bit DAC)

MP3

Bit rate 32 kbps - 320 kbps

Sampling frequency 32 kHz, 44.1 kHz, 48 kHz

n GENERAL

Power Supply AC 110/ 127/ 220-230/ 240 V,

50/ 60 Hz

Power consumption 179 W

Power consumption in standby mode

Dimensions (W x H x D) 250 x 330 x 363 mm

0.85 W

SA-AK220GCP

Mass 7.5 kg

n SYSTEM

SC-AK220 (GCP) Music center: SA-AK220 (GCP)

Speaker: SB-AK220 (P)

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.

3. The labels “HIGH” and “LOW” on the rear of the speakers refer to High frequency and Low frequency.

CONTENTS

Page Page

1 Before Use

2 Before Repair and Adjustment

3 Protection Circuitry

4 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

5 Handling the Lead-free Solder

5.1. About lead free solder (PbF)

6 Handling Precautions For Traverse Deck

7 Precaution of Laser Diode

8 Accessories

9 Operation Procedures

10 Disassembly and Assembly of Main Component

10.1. Disassembly flow chart

10.2. Disassembly of Top Cabinet and Rear Panel

10.3. Disassembly of CD Mechanism Unit

10.4. Disassembly Main P.C.B., Transformer P.C.B., Voltage

Selector P.C.B. & Power P.C.B.

10.5. Disassembly of Panel P.C.B. & Tact Switch P.C.B.

10.6. Disassembly of Deck Mechanism Unit & Deck P.C.B.

10.7. CD Mechanism Main Component Replacement

Procedures

10.8. Replacement for the pinch roller ass 馳 and head block

10.9. Replacement for the Deck motor ass 馳, capstan belt A,

capstan belt B and winding belt

10.10. Replacement for the cassette lid ass 馳

10.11. Counter- measure for tape trouble

11 Service Position

11.1. Checking Procedure

11.2. Checking the Main P.C.B., Power P.C.B., Transformer

P.C.B. and Voltage Selector P.C.B.

11.3. Checking the Panel P.C.B., Tact Switch P.C.B., Deck

P.C.B. & Deck Mechanism P.C.B.

12 Description of Error Code

12.1. Abnormality detection for Deck Mechanism block

12.2. Abnormality detection for CD/Changer block

12.3. Power supply related error detection

13 Self-Diagnostic Function

13.1. Self-diagnostic display

13.2. How to enter the Self-Diagnostic Function

13.3. Cassette Mechanism Test (For error code H01, H02, H03,

F01, F02)

13.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29,

H15)

13.5. To clear all Error code

13.6. How to get out from Self-Diagnostic function

13.7. Power Amplifier Failure (F61)

14 CD Test Mode Function

14.1. How to set CD test mode

14.2. CD Automatically Adjustment result indication

15 Measurements and Adjustments

15.1. Cassette Deck Section

15.2. Tuner Section

15.3. Alignment Points

16 Block Diagram

17 Schematic Diagram

17.1. (A) CD Servo Circuit

17.2. (B) Tuner/Main Circuit

17.3. (B) Main Circuit

17.4. (C) Panel Circuit & (D) Tact Switch Circuit

17.5. (F) CD Detect Circuit, (G) Spindle Position Circuit & (H)

CD Loading Circuit

17.6. (E) Transformer Cuircuit & (L) Voltage Selector Circuit

17.7. (I) Power Circuit

17.8. (J) Deck Circuit & (K) Deck Mechanism Circuit

18 Printed Circuit Board

18.1. (A) CD Servo P.C.B. (Side A & Side B)

18.2. (B) Main P.C.B.

18.3. (C) Panel P.C.B.

18.4. (D) Tact P.C.B. & (M) Voltage Selector P.C.B.

18.5. (E) Transformer P.C.B.

18.6. (F) CD Detect P.C.B., (G) Spindle Position P.C.B., (H) CD

Loading P.C.B. & (L) Tuner Pack P.C.B.

18.7. (I) Power P.C.B.

18.8. (J) Deck P.C.B. & (K) Deck Mechanism P.C.B.

SA-AK220GCP

19 Wiring Connection Diagram 78 20 Illustration of IC 痴, Transistors and Diodes 21 Terminal Function of IC 痴

21.1. IC701 (AN22004A-NF) Servo Amplifier

21.2. IC702 (MN6627934CH) Servo Processor/ Digital Signal

Processor/ Digital Filter/ D/A Converter

21.3. IC703 (AN8739SBTE2) Focus Coil/ Tracking Coil/

Traverse Motor/ Spindle Motor Driver

21.4. IC305 (C2CBJF000017) System Microprocessor

22 Troubleshooting Guide

23 Parts Location and Replacement Parts List

23.1. Deck Mechanism (RAA4502-S)

23.2. CD Loading Mechanism (RD-DAC026-S)

23.3. Cabinet

23.4. Electrical Parts List

23.5. Packing Materials & Accessories Parts List

23.6. Packaging

102

103

SA-AK220GCP

1 Before Use

Be sure to disconnect the mains cord before adjusting the voltage selector.

Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be used. (If the power supply in your area is 117V or 120V, set to the “127V” position.)

Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is already set.)

2 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C520 and C540 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.

Current consumption at AC 110V, 50/60 Hz in NO SIGNAL mode (volume min at CD mode), should be ~ 500mA & at AC 220V230V, 50 Hz should be ~350mA.

3 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.

4 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

SA-AK220GCP

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).

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).

· W hen 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.

SA-AK220GCP

6 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. The short land between the No.4(LD) and No.5(GND) pins on the flexible board (FFC) is shorted with a solder build-up to prevent damage to the laser diode.T o connect to the PC board, be sure to open by removing the solder build-up, and finishth e work quickly.

3. Take care not to apply excessive stress to the flexible board (FFC).

4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.

Fig 6.1

· 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 placed , 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 electrostatic breakdown. Be sure to remove the solder from the short point before making connections.

Fig 6.2

SA-AK220GCP

7 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

SA-AK220GCP

8 Accessories

Remote Control

Transmitter

FM Indoor Antenna

AC Power Supply Cord

AM Loop Antenna

Power Plug Adaptor

9 Operation Procedures

SA-AK220GCP

10 Disassembly and Assembly of Main Component

10.1. 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.

10.2. Disassembly of Top Cabinet and Rear Panel

SA-AK220GCP

Step 1 Remove 3 screws each side and 5 screws at rear panel.

Step 2 Lift up both sides of top cabine t, push the cabinet ass’y

toward the rear and remove it.

· Disasse mbly of Rear Panel

Step 4 Draw rear panel forward.

10.2.1. Disassembly for CD Lid

(The CD changer unit can be removed after the CD Lid is removed)

· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

When 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 3 Remove 6 screws.

Step 3 Press the OPEN/CLOSE button, the disc tray will be

open automatically.

Step 4 Release the 2 claws, and then remove the CD Lid.

SA-AK220GCP

Step 5 Press the OPEN/CLOSE button, the disc tray will be

close.

[Open the disc tray manually (Using service tools)]

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 open.

Step 2 Release the 2 claws, and then remove the CD lid cover.

direction.

Step 4 The disc tray will be close.

Step 3 Repeat Step 2 but rotate the gear tools in anti-clockwise

10.3. Disassembly of CD Mechanism Unit

SA-AK220GCP

· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of Top Cabinet and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly for CD Lid

Step 1 Detach the FFC boards (CN309 & CN310).

Step 3 Remove 4 screws.

Step 4 Remove the CD chassis.

Step 5 Lay the CD mechanism unit as shown.

· Note:

Step 2 Releas e the claws of both ends, and then lift up the CD

Mechanism Unit.

For disassembly of CD mechanism unit, please refer to Section 10.7 of this manual.

SA-AK220GCP

10.4. Disassembly Main P.C.B., Transformer P.C.B., Voltage Selector P.C.B.

& Power P.C.B.

10.4.1. Disassembly for the Main P.C.B.

· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of

the CD Mechanism Unit

Step 1 Disconnect FFC board at CN303, CN302 & CN304 .

10.4.3. Disassembly of the Power P.C.B.

· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of

the CD Mechanism Unit

· Follow the (Step 1) - (Step 2) of Item 10.4.1 - Disassembly

for the Main P.C.B.

Step 1 Remove 2 screws.

Step 2 Remove the 2 screws fixed at heat sink.

Step 2 Lift up Main P.C.B. by disconnect CN500 & CN501 as

arrow shown above.

10.4.2. Disassembly of the Transformer

P.C.B. & Voltage Selector P.C.B.

· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of

the CD Mechanism Unit

Step 1 Remove 3 screws.

NOTE:

Insulate Power P.C.B. with insulation material to avoid short circuit.

· Replace ment of Power Amplifier IC & Voltage Regulator

Step 1 Remove 2 screws (For Power Amp IC) and 1 screw (For Voltage Regulator) .

Step 2 Disconnect connector CN950.

Step 2 Break the joint with a metal cutter as shown below.

SA-AK220GCP

Step 3 Unsold er the terminals of Power Amp IC, transistor and

replace the components.

Step 4 Fix back the cutted portion with a screw as shown.

10.5. Disassembly of Panel P.C.B. & Tact Switch P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of

the CD Mechanism Unit

· Disassembly of Panel P.C.B.

Step 1 Lay the unit as shown below.

Step 2 Remove 2 screws, release 2 claws, and then draw the

front panel ass’y forward.

Step 3 Remove the 8 screws.

Step 4 Disconnect FFC board (CN302).

· Disassembly of Tact Switch P.C.B.

Step 5 Disconnect connector CN900.

SA-AK220GCP

Step 6 Pull out the volume knob.

Step 7 Pull Panel P.C.B. forward.

10.6. Disassembly of Deck Mechanism Unit & Deck P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of

the CD Mechanism Unit

Step 1 Detach FFC board. (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 P.C.B.

Step 6 Unsolder the motor terminals.

Step 7 Remove 3 screws.

Step 8 Remove Deck P.C.B.

10.7. CD Mechanism Main Component Replacement Procedures

· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of

the CD Mechanism Unit

10.7.1. Replacement of the Traverse Deck

Step 1 Remove the CD changer unit.

Step 2 Insert the gear with hexagonal wrench into the hole.

SA-AK220GCP

Step 4 With pressing the claw (A), rotate the hexago nal 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 6 Lift up the traverse deck ass’y.

Step 3 Rotate the hexagonal wrench in the direction of arrow

(clockwise), and then open the disc tray fully.

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).

SA-AK220GCP

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.

Step 10 Remove the FFC board from the connector, and then

remove the CD Servo P.C.B.

Step 11 Remove the pin.

· Note for installation of the CD servo P.C.B.

· Installation for traverse deck ass’y

Step 12 Release the claw, and then remove the traverse deck ass’y.

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.

SA-AK220GCP

Step 3 Force the claw of timing lever.

Step 4 Force the disc tray fully.

Step 5 With pressing the claw (B) in the direction of arrow (1),

force the connection lever in the direction of arrow (2).

10.7.2. Replacement for the Disc Tray

Step 1 Remove 4 screws.

Step 2 Remove the upper plate.

Step 3 Remove 3 screws.

SA-AK220GCP

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.

Step 6 Insert the gear with hexagonal wrench into the hole.

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 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.

SA-AK220GCP

10.7.3. Disassembly and reassembly for mechanism base drive unit

Step 1 Remove 3 screws.

Step 2 Holding the drive rack not to move, install the disc tray.

Step 3 Align the drive rack with the drive gear.

NOTE:

Force the right guide bar of tray base manually not to move upwards.

Step 2 Release the claw, and then remove the gear holder.

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.

Step 4 Holdin g the disc tray manually, push the disc tray in the direction of the arrow.

Step 5 Release the 2 claws, and then remove the bottom SW P.C.B..

SA-AK220GCP

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.

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).

SA-AK220GCP

Step 13 Remove the traverse relay gear, traverse cam gear

and drive gear.

Step 12 Remove slide plate 1 and slide plate 2.

[Dissassembly/reas sembly 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.

SA-AK220GCP

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 4 Release the 2 claws, and then draw the relay gear B.

Step 5 Release the 2 claws as shown below.

Step 6 Remove the cushion spring.

Step 7 Remove the loading stopper ass’y in the direction of

arrow.

SA-AK220GCP

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 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.

Step 3 Force the loading stopper ass’y, latch the claw firmly.

[Reassembly for mechanism base drive unit]

*When installing the traverse relay gear, align the trapezoid tooth of gear with tooth of traverse cam gear.

SA-AK220GCP

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 Spindl e Position P.C.B.. (The claw should be

latched.)

Step 10 Install the tray lock. (The claw should be latched.)

SA-AK220GCP

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.

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).

10.7.4. 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 3 Remove 3 screws.

Step 13 Install the gear holder, and then tighten the screw (a).

Step 4 Unsolder the plunger terminals (2 points).

Step 5 Unsolder the motor terminals (2 points).

SA-AK220GCP

10.8. Replacement for the pinch

roller ass’y and head block

· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of

the CD Mechanism Unit

· Follow the (Step 1) of Item 10.4 - Disassembly the Main

P.C.B. & Transformer P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.5 - Disassembly of

the Panel P.C.B. & Tact Switch P.C.B.

· Follow the (Step 1) - (Step 5) of Item 10.6 - Disassembly for

the Deck Mechanism Unit & Deck P.C.B.

* The mechanism as shown below is for DECK1. For the one of DECK 2, perform the same procedures.

Step 6 Release the 2 claws (A), and then remove the Motor

P.C.B.

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 1 Release the 2 claws, and then remove the pinch roller

(R), (F).

Step 2 Release ther 2 claws, and then remove the head connector.

SA-AK220GCP

Step 3 Remove 2 screws.

10.9. Replacement for the Deck motor ass’y, capstan belt A, capstan belt B and winding belt

· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of

Top Cabine t and Rear Panel

· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly

for CD Lid

· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of

the CD Mechanism Unit

· Follow the (Step 1) of Item 10.4 - Disassembly the Main

P.C.B. & Transformer P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.5 - Disassembly of

the Panel P.C.B. & Tact Switch P.C.B.

· Follow the (Step 1) - (Step 5) of Item 10.6 - Disassembly for

the Deck Mechanism P.C.B.

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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