SA SA TM23 Service Manual

ORDER NO. MD0411547C1
Service Manual
A6
MODEL UNIT
SC-TM23 SA-TM23 STEREO
SB-TM23 FRONT SPEAKER
SB-TM23 SA-TM23 SB-TM23
SC-TM23
Potencia de salida
SC-TM 23 Frontal 90W RCM por canal (5Ω)
Amplificador SA-TM23
Potencia de salida 2000 W (P.M.P.O) Consumo de potencia 145 W
Alimentaciòn 127 V ca ±10% 60 Hz
Sencibilidad Aux: 250 mV
Rango de sintonìa AM: Rango de sintonìa FM:
Dimensiones (b x h x l) 250 mm x 330 mm x 320mm Peso: 6.4 kg aprox
520-1710MHz (paso de 0,2 MHz)
87.9-107.9 MHz (paso de 0,2 MHz
87.5-108.0 MHz (paso de 0,1 MHz
1kHz, 10% DAT
Bafles SB-TM23
FRONTAL Bocina Super Tweeter - - - - - ­Bocina Tweeter 6 cm Bocina Woofer 16 cm
IMPEDANCIA Frontal 5 Alto - - - - - ­Bajo - - - - - -
Dimensiones (b x h x l) 220 mm x 330 mm x 201mm
Peso: 2.7 kg aprox.
Notes: Specifications are subject to change without notice. Mass and dimensions are approximate.Total harmonic distortion is measured by the digital spectrum analyzer.
© 2004 Matsushita Electric Industrial Co. Ltd.. All rights reserved. Unauthorized copying and distribution is a violation of law.
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WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potencial dangers in attemping to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
Contents
1 Safety Precaution
1.1 Insulation Resistance Test
1.2 Caution for fuse replacement 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 Gear for servicing (jig) Information
10.3 Disassembly of Top Cabinet
10.4 Disassembly of CD Lid
10.5 Disassembly of Rear Panel
10.6 Disassembly of CD Mechanism Unit
10.7 Disassembly of Main P.C.B.
10.8 Disassembly of Power P.C.B.
10.9 Disassembly of Transformer P.C.B.
10.10 Disassembly of Front Panel Unit
10.11 Disassembly of Deck Mechanism Unit
10.12 CD Mechanism Main Component Replacement Procedures
10.12.1 Replacement of the Traverse Deck
10.12.2 Replacement for the Disc Tray
10.12.3 Disassembly and reassembly for mechanism base drive unit
10.12.4 Replacement for the motor ass ’ y
10.13 Replacement for the pinch roller ass ’ y and head block
10.14 Replacement for the Deck motor ass ’ y, capstan belt A, capstan belt B and winding belt
10.15 Replacement for the cassette lid ass ’ y
10.16 Rectification for tape jam problem 11 Checking for major P.C.Bs
11.1 Checking of Main P.C.B.
11.2 Checking of Transformer P.C.B.
11.3 Checking of Panel, Deck & Deck Mechanism P.C.B.
11.4 Checking of Power P.C.B. 12 Self-Diagnostic Function
12.1 Self-diagnostic display
12.2 How to enter the Self-Diagnostic Function
12.3 Cassette Mechanism Test (For error code H01, H02, H03, F01)
12.4 CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29, F30, H15 & H16)
12.5 To clear all Error code
12.6 To exit from Self-Diagnostic function
12.7 Power Amplifier Failure (F61)
12.8 Description of Error Code
12.8.1 Abnormality detection for Deck Mechanism block
12.8.2 Abnormality detection for CD / Changer block
12.8.3 Power supply related error detection
12.8.4 Error Code (CR20 Mechansim)
13 CD Test Mode Function
13.1 How to set CD test mode
13.2 CD Automatically Adjustment result indication
13.3 CD Mecha Aging Test Mode (CR20)
13.4 Micon ROM Checksum and Version Display Mode 14 Measurements and Adjustments
14.1 Cassette Deck Section
14.1.1 Tape Speed Adjustment (Deck 1 / 2)
14.1.2 Bias and Erase Voltage Check
14.1.3 Bias Frequency Adjustment (Deck 1 / 2)
14.2 Tuner Section
14.2.1 AM-IF Alignment
14.2.2 AM RF Adjustment
14.3 Alignment Points
14.3.1 Cassette Deck Section
14.3.2 Tuner Section 15 Block Diagram 16 Voltage Measurement 17 Schematic Diagram
17.1 (A) CD Servo Circuit
17.2 (B) Main (Tuner) Circuit
17.3 (B) Main Circuit
17.4 (C) Panel Circuit
17.5 (D) Transformer Circuit, (E) CD Detect Circuit, (F) Spindle Position Circuit & (G) CD Loading Circuit
17.6 (H) Power Circuit
17.7 (I) Deck Circuit & (J) Deck Mechanism Circuit 18 Printed Circuit Board
18.1 (A) CD Servo P.C.B.
18.2 (B) Main P.C.B.
18.3 (C) Panel P.C.B.
18.4 (D) Transformer P.C.B.
18.5 (E) CD Detect P.C.B., (F) Spindle Position P.C.B., (G) CD Loading P.C.B. & (K) Tuner Pack P.C.B.
18.6 (H) Power P.C.B.
18.7 (I) Deck P.C.B. & (J) Deck Mechanism P.C.B. 19 Wiring Connection Diagram 20 Illustration of IC ’ s, Transistors and Diodes 21 Terminal Function of IC ’ s
21.1 IC7002 (MN6627953HB) Servo processor / Digital signal processor / Digital filter / D / A converter
21.2 IC7003 (AN8739SBTE2) Focus coil / Tracking coil / Traverse motor / Spindle motor drive
21.3 IC2801 (C2CBJG000565) System Microprocessor 22 Troubleshooting Guide
23 Parts Location and Replacement Parts List
23.1 Deck Mechanism (RAA4502-S)
23.1.1 Deck Mechanism Parts Location
23.1.2 Deck Mechanism Parts List
23.2 CD Loading Mechanism (RD-DAC026-S)
23.2.1 CD Loading Mechanism Parts Location
23.2.2 CD Loading Mechanism Parts List
23.3 Cabinet
23.3.1 Cabinet Parts Location
23.3.2 Cabinet Parts List
23.4 Electrical Parts List
23.5 Packing Materials & Accessories Parts List
23.6 Packaging
1 Safety Precaution
(This “Safety Precaution” is applied only in U.S.A.)Before servicing, unplug the power cord to prevent an electric shock. When replacing parts, use only manufacturer’s recommended components for safety. Check the condition of the power cord. Replace if wear or damage is evident. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the customer from being exposed to a shock hazard.
1.1 Insulation Resistance Test
Unplug the power cord and short the two prongs of the plug with a jumper wire. Turn on the power switch. Measure the resistance value with ohmmeter between the jumper AC plug and each exposed metal cabinet part, such as screwheads, antenna, control shafts, handle brackets, etc.Measure the resistance value with ohmmeter between the jumper AC plugand each exposed metal cabinet part, such as screwheads, antenna, control shafts, handle brackets, etc.
Equipment with antenna terminals should read between 2.7M˜ and 3.9M˜ to all exposed parts*. ( Fig.1 ) Equipment without antenna terminals should read approximately infinity to all exposed parts. ( Fig.2 ) *Note : Some exposed parts may be isolated from the chassisby design. These will read infinity. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be repaired and re-checked before it is returned to the customer.
Fig.1
1.2 Caution for fuse replacement
(For English) CAUTION:
Fig.2
Replace with the same type fuse: (Manufacturer: LITTELFUSE, INC, Type: F1, 2.5A, 125V)
(For Canadian French) ATTENTION:
Utiliser un fusible de rechanche de méme type: (Manufacturer: LITTLEFUSE, INC, Type: F1, 2.5A, 125V)
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2 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. Current consumption at AC 120V, 60 Hz in NO SIGNAL mode (volume min at CD mode) should be ~600mA.
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 transistorsand 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, whichshould 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 orcomparable 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 todamage an ES device).
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by in the schematic diagrams, Exploded Views and replacement parts list. It is essential that these critical parts should be replaced with manufacturer´s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of manufacturer.
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5 Handling the Lead-free Solder
5.1 About lead free solder (PbF)
Distinction of PbF P.C.B.: P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.
Caution:
· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 ­40°C) higher. Please use a high temperature soldering iron. In case of soldering iron with temperature control,please set it to 700 ± 20°F (370 ± 10°C).
· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
· When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough.
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. 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.
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Grounding for electrostatic breakdown prevention
1. Human body grounding Use the anti-static wrist strap to discharge the static electricity from your body.
2. Work table grounding Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is place, and ground the sheet.
Caution :
The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup).
Caution when replacing the Traverse Deck
The traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections.
7 Precaution of Laser Diode
CAUTION:
This unit utilizes a class 1 laser. Invisible laser radiation is emitted from the optical pickup lens. Wavelength: 780nm When the unit is turned on:
1. Do not look directly into the pick up lens.
2. Do not use optical instruments to look at the pick up lens.
3. Do not adjust the preset variable resistor on the pickup lens.
4. Do not disassemble the optical pick up unit.
5. If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.
6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
CAUTION!
THIS PRODUCT UTILIZES A LASER.USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUSRADIATION EXPOSURE.
Use of caution label (Except for U.S.A.)
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8 Accessories
Remote Control EUR7710020 (1 Pc)
AC Cord SJA168-1A (1 Pc)
FM Antenna RSA0006-L (1 Pc)
AM Loop Antenna N1DAAAA00001 (1 Pc)
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9 Operation Procedures
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10 Disassembly and Assembly of Main Component
“ATTENTION SERVICER”
Some chassis components may have sharp edges. Be careful when disassembling and servicing.
main components.
Special reassembly procedures are described only when required.
1.-This section describes procedures for checking the operation of the major printed circuit boards and replacing the
2.-For reassembly after operation checks or replacement, reverse the respective procedures.
3.-Select items from the following index when checks or replacement are required.
4.-Refer to the Parts No. on the page of “Main component Replacement Procedures”, if necessary.
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.
(Open/Close of disc tray, up/down operation of traverse unit by manually) when servicing.
procedures as follows. servicing” may has been taken off because it has been used.
The “gear for servicing” must be stored.
· Remove the gear provided with mechanism cover as shown below.
10.2 Gear for servicing (jig) Information
1.-This unit has a gear which is used for checking items
2.-For preparation of gear (for servicing), perform the
3.-In case of re-servicing the same set, the “gear for
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Insert the hexagonal screwdriver (2mm) into the gear, and then project the tip of screwdriver for 1~ 2 mm in length.
10.3 Disassembly of Top Cabinet
10.4 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 10.3 ­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 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.
Step 3 Press the OPEN/CLOSE button, the disc tray will open automatically.
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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 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 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 4 The disc tray will be closed.
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10.5 Disassembly of Rear Panel
10.6 Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of Top Cabinet
Step 1 Remove 6screws and disconnect wire CN2810 (Fan) at rear cabinet as shown.
· Follow the (Step 1) - (Step 2) of Item 10.3 ­Disassembly of Top Cabinet
Step 1 Remove one screw at rear panel. Step 2 Detach the FFC wires (CN2801 & CN2805).
Step 3 Release the claws of both ends, and then lift up the
CD Mechanism Unit.
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 10.11 of this manual.
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10.7 Disassembly of Main P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 ­Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 ­Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of the Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 ­Disassembly of the CD Mechanism Unit
Step 1 Disconnect FFC wires CN2803 & CN2806 from Main P.C.B.
Step 1 Remove the 2 screws fixed at heat sink and 1 screw fixed at Power P.C.B..
Step 2 Lift up Main P.C.B. by disconnecting connectors CN5800 & CN5801 as arrow shown above.
10.8 Disassembly of Power P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of the Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of the CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.7 - Disassembly of the Main P.C.B.
Note:
Insulate the Power P.C.B. with insulation material to avoid short circuit.
· 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.
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Step 2 Break the joint with a metal cutter as shown below.
Step 3 Unsolder the terminals of Power Amp IC, transistor and
replace the components.
10.9 Disassembly of Transformer P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 ­Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 ­Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of the Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 ­Disassembly of the CD Mechanism Unit
Step 1 Remove 3 screws, disconnect connector CN5950.
Step 4 Fix back the cut portion with a screw as shown.
10.10 Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 2) of Item 10.3 ­Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 ­Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of the Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 ­Disassembly of the CD Mechanism Unit
Step 1 Lay the unit as shown below.
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Step 2 Release 2 claws at bottom and 2 claws each side,
draw the front panel ass’y forward.
10.11 Disassembly of Deck Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of the Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of the CD Mechanism Unit
· Follow the (Step 1) - (Step 3) of Item 10.10 ­Disassembly of the Front Panel Unit
Step 1 Detach FFC wire (at CN971). Step 2 Disconnect FFC flat cable from the connector
(CN1001).
Step 3 Remove the 5 screws.
Step 3 Remove volume knob.
· Disassembly of Panel P.C.B.
Step 4 Remove the 10 screws. Step 5 Disconnect connectors CN2806, CN2803 and CN5950.
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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.
Step 7 Unsolder the motor terminals.
10.12.1 Replacement of the Traverse Deck
Step 2 Insert the gear with hexagonal wrench into the hole.
Step 8 Remove Deck Mechanism P.C.B.
10.12 CD Mechanism Main Component Replacement Procedures
· Follow the (Step 1) - (Step 2) of Item 10.3 ­Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 ­Disassembly of CD Lid
· Follow the (Step 1) - (Step 6) of Item 10.6 ­Disassembly of the CD Mechanism Unit
Step 3 Rotate the hexagonal wrench in the direction of arrow (clockwise), and then open the disc tray fully.
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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 6 Lift up the traverse deck ass’y.
Step 8 Remove 3 screws. Step 9 Unsolder the motor terminals (4 points).
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 10 Remove the FFC board from the connector, and then remove the CD Servo P.C.B.
Step 11 Remove the pin.
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Step 12 Release the claw, and then remove the traverse
deck ass’y.
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.
Installation for traverse deck ass’y
Note for installation of the CD servo P.C.B.
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.
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Step 3 Force the claw of timing lever.
Step 5 With pressing the claw (B) in the direction of arrow (1),
force the connection lever in the direction of arrow (2).
10.12.2 Replacement for the Disc Tray
Step 1 Remove 4 screws. Step 2 Remove the upper plate. Step 3 Remove 3 screws.
Step 4 Force the disc tray fully.
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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 7 Rotate the hexagonal wrench in the direction of arrow,
and then open the disc tray fully.
Step 6 Insert the gear with hexagonal wrench into the hole.
Step 8 Release the both claws, and then draw the disc tray.
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Step 9 With forcing the left guide bar manually because the
left guide bar interfers with claw, draw the disc tray.
Step 2 Holding the drive rack not to move, install the disc tray.
[Installation of the disc tray after replacement]
Step 1 Slide the drive rack fully in the direction of arrow.
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 4 Holding the disc tray manually, push the disc tray in the direction of the arrow.
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10.12.3 Disassembly and reassembly for mechanism base drive unit
Step 1 Remove 3 screws.
Step 4 Remove the pulley gear, change gear and UP/DOWN
gear.
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.
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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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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.
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Step 2 Pushing the claw, slide the support plate in the
direction of arrow, and then remove it.
Step 3 Rotate the disc lever in the direction of arrow (1), draw the disc lever.
Step 4 Release the 2 claws, and then draw the relay gear B. Step 5 Release the 2 claws as shown below.
NOTE:
Take care not to lose the disc lever spring.
NOTE:
Hold the loading stopper ass’y manually bacause it is flipped by spring.
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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 6 Remove the cushion spring. Step 7 Remove the loading stopper ass’y in the direction of
arrow.
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
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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 2 Lower the loading stopper ass’y, and then align the lower spindle with the trapezoid tooth of relay gear A.
Step 15 Rotate the UP/DOWN base at a 90° angle. Then, 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 3 Force the loading stopper ass’y, latch the claw firmly.
[Reassembly for mechanism base drive unit]
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Step 1 Install the traverse cam gear. Step 2 Rotate the traverse cam gear to the direction of arrow.
*When installing the traverse relay gear, align the trapezoid tooth of gear with tooth of traverse cam gear.
Step 3 Install the drive gear and traverse relay gear.
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.)
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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.)
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).
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Step 13 Install the gear holder, and then tighten the screw
(a).
10.12.4 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 3 Remove 3 screws
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 4 Unsolder the plunger terminals (2 points). Step 5 Unsolder the motor terminals (2 points).
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