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CDP-CX220
SERVICE MANUAL US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Model Name Using Similar Mechanism CDP-CX250
CD Mechanism Type CDM-40B
Base Unit Type KSM-213BKN/M-N
Optical Pick-up Type KSS-213B/S-N
SPECIFICATIONS
Compact disc player General
Power requirements
Laser Semiconductor laser (λ = 780 nm)
Where purchased Power requirements
Emission duration: continuous
USA/Canada 120 V AC, 60 Hz
Laser output Max 44.6 μW*
Australia 240 V AC, 50/60 Hz
* This output is the va
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TABLE OF CONTENTS CAUTION Use of controls or adjustments or performance of procedures 1. SERVICING NOTES ............................................... 3 other than those specified herein may result in hazardous radiation exposure. 2. GENERAL ................................................................... 6 3. DISASSEMBLY ......................................................... 7 The laser component in this product is capable of emitting radiation 4. TEST MODE .........................
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SECTION 1 SERVICING NOTES SAFETY CHECK-OUT NOTES ON HANDLING THE OPTICAL PICK-UP After correcting the original service problem, perform the follow- BLOCK OR BASE UNIT ing safety check before releasing the set to the customer: The laser diode in the optical pick-up block may suffer electro- Check the antenna terminals, metal trim, “metallized” knobs, static break-down because of the potential difference generated screws, and all other exposed metal parts for AC leakage. by the charged
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CD-TEXT TEST DISC This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display. To check, perform the following procedure. Checking Method: 1. Turn ON the power, set the disc on the disc table with the side labeled as “test disc” as the right side, close the front cover, and chuck the disc. 2. Press the á button and play back the disc. 3. The following will
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Table 2: CD-TEXT TEST DISC Recorded Contents and Display (In this unit, some special characters cannot be displayed. This is no a fault.) TRACK Recorded Contents Display No. 42 ! ” # $ % & ´ (21h to 27h)1kHz 0dB L&R N All the same 43 ( ) + , – . / (28h to 2Fh) N All the same * 44 0 123456 7 (30h to 37Fh) N All the same 45 8 9 : ; < = > ? (38h to 3Fh) N All the same 46 @A B C D E F G (40h to 47Fh) N All the same 47 H I J K L M N O (48h to 4Fh) N All the same 48 P Q R S T U V W (50h to 57Fh) PQ R
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SECTION 2 GENERAL LOCATION OF PARTS AND CONTROLS Front Panel 1 2 345 67 8 9 !¼ !Á !ª STANDBY 1/u !£ DISC/CHARACTER INPUT MEMO SEARCH PUSH ENTER CONTINUE SHUFFLE PROGRAM REPEAT TIME/TEXT AMS CHECK CLEAR ± GROUP 1 GROUP 2 GROUP 3 GROUP 4 OPEN/CLOSE ¤ Pp GROUP 5 GROUP 6 GROUP 7 GROUP 8 GROUP FILE !¢ @¼ !» !¥ !¦ !¤ !° 1 I/u (power switch) button !Á /± buttons 2 CONTINUE button !ª JOG dial (DISC/CHARACTER/PUSH ENTER knob) 3 SHUFFLE button !£ CHECK button 4 Display window !¢ CLEAR button 5 PROGR
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SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CASE 1 four screws 3 Remove the case to (case 3 TP2) direction of arrow A. 1 five screws (case 3 TP2) A 2 Open the case. FRONT PANEL SECTION 1 flat wire (CN501) 6 Remove the door (CD) ass’y to direction of arrow A. 2 four screws (BVTP3 × 8) A 4 claw 4 claw 5 front panel section 3 five screws (BVTT3 × 6) – 7 –
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GUIDE ASS’Y 3 three screws (BVTT3 × 6) 4 boss 5 guide ass’y 3 three screws 2 screw (BVTT3 × 6) (PSW3 × 6) 1 connector (CN503) REAR PANEL SECTION 3 three connectors (CN504, 506, 507) 1 connector (CN505) 2 flat wire 6 rear panel section (CN502) 4 five screws (BVTT3 × 6) 1 connector (CN904) 3 four screws (PTTWH3 × 6) 5 PC board holder 7 four screws 8 bracket (BVTT3 × 6) – 8 –
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MECHANISM DECK 2 mechanism deck 1 three screws (BVTT3 × 8) 1 six screws (BVTT3 × 8) BASE UNIT 1 screw (BVTT3 × 8) 2 fulcrum plate (BU upper) ass’y 3 base unit – 9 –
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SECTION 4 TEST MODE DISPLAY CHECK MODE KEY AND FLUORESCENT DISPLAY TUBE CHECK With the power turned off (standby state), press the I/u button MODE while pressing the P (pause) button. 1. Connect the test point (TP:AFADJ) of the MAIN board to the All FL segments and grids light up together with theá (play), Ground, and insert the power plug to the outlet to set this mode. P (pause), and standby LEDs. First, the external SRAM is checked, and if abnormal, “SRAM At the same time, the GROUP LEDs
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Partial lighting 1 AGING MODE • Mode which repeatedly changes and plays back discs automati- cally in the unit. O • It will repeat aging as long as no errors occur. • If an error occurs during aging, it will stop all servos, motors, A B C D E F G etc. instantaneously, display the error number, and stop opera- tions. However, the stopping conditions differ according to whether the unit is equipped with the “self-protection function Partial lighting 2 during errors” described later. The function
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Aging Method 1. Change the [COMMANDÊMODE] switch (S901) on set to [CD1]. 2. Turn ON the power of the unit. Open the front cover. 3. Press the [AGINGÊSTART] button of the remote commander for aging mode (J-2501-123-A). 4. When the disc set mode is set, the á and P LEDs blink. 5. Rotate the JOG dial. The slits (No. 40, 80, 120, 160, 200) for setting the discs will come forward. Insert the discs into these slits. Do not set the discs in other slits. 6. Set whether the self-protection function durin
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SECTION 5 MECHANICAL ADJUSTMENTS Perform the following steps before carrying out adjustments. 1. Turn ON the power of the unit, set disc to disc table No. 92, and perform chucking. 2. Turn OFF the power. 3. Remove the case. 4. While pressing the [STOP] button, turn ON the I/u button. The test mode is set. 5. The I/u button LED (STANDBY) starts blinking. (Test mode) LED (STANDBY) p 1/u 1/u button STOP button Note 1: The cam will start rotating when the [GROUPÊ1] or [GROUPÊ5] button is pressed c
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GUIDE (DISC T) ALIGNMENT holder (guide T) cam cam fixed screw guide (disc T) (1) Rotate the cam and adjust to the posi- tion shown in the figure. guide (disc T) (2) Check that the state is as shown in the figure. disc A B tapering screwdriver guide (disc T) disc holder (guide T) (4) Move the holder (guide T) with a tapering screwdriver, holder and set the position of the guide (disc T) to A:B=1:1. (guide T) (3) Loosen the fixed screw by about 60 °. – 14 –
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HOLDER (DISC A2) ALIGNMENT cam holder (disc A2) cam thrust screw (1) Rotate the cam and adjust to the position shown in the figure. disc 0 – 1 mm holder (disc A2) (2) Check that the state is as shown in the figure. disc holder (disc A2) thrust screw 123 123 (3) After applying suitable locking compound to the part, rotate the thrust screw until the holder (Disc A2) comes to the center of the disc. – 15 –
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SENSOR ALIGNMENT Perform this adjustment after the “holder (disc A2) adjustment”. If the disc table swings to the left and right just before the disc is chucked, perform the following adjustment. cam lever (stopper) ass’y cam (1) Rotate the cam and adjust to the position bracket (sensor) shown in the figure. table ass’y (2) Check that the lever (stopper) ass’y secures the disc table as shown in the figure. disc table swing lever (stopper) ass’y (4) Moving the disc table right and left with a ha
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PULLY AND DISC CENTER HOLE ALIGNMENT base unit cam cam bracket (BU adjustment) (1) Rotate the cam and adjust to the position shown in the figure. magnet ass’y (2) Check that the state is as shown in the figure. 0.5 – 2 mm disc disc pulley disc hole base unit Note: The disc should not be fixed. holder (disc A2) fixed screw bracket (BU adjustment) tapering screwdriver magnet ass’y (4) Loosen the fixed screw by 60° to 90°, and move and adjust (3) Remove the Magnet ass’y. the bracket (BU adju
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MAGNET ASS’Y ALIGNMENT cam cam adjustment screw magnet ass’y (1) Rotate the cam and adjust to the position shown in the figure. disc magnet holder magnet ass’y adjustment screw AB 1234 1234 (3) Apply suitable locking compaund to the part after ad- 1234 justing. adjustment screw (2) Rotate the adjustment screw until A=B or between A:B=2:1 and 1:2 – 18 –
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SECTION 6 ELECTRICAL ADJUSTMENTS Note: Note: A clear RF signal waveform means that the shape “◊” can be clearly distinguished at the center of the waveform. 1. CD Block is basically designed to operate without adjustment. There- fore, check each item in order given. RF signal waveform 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10MΩ impedance. 4. Clean the object lens by an applicator with neutral detergent when the VOLT/DIV: 200 mV sign
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RF PLL Free-run Frequency Check Procedure: Procedure : 1. Connect the oscilloscope to Pins 1, 2, and 4 of CN506 of 1. Connect frequency counter to test point TP (XPCK) with lead the MAIN board. Also connect a 1 kΩ resistor to Pin 4 at the wire. same time. (Connection 1) 2. Check that no discs are loaded in the unit, and press the frequency counter I/u button while pressing the [INPUT] button. BD board 3. The rotary table will continue rotating in the clockwise direc- tion. TP (XPCK) + – 4. Obser
