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Service Manual
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ZS-M35
SERVICE MANUAL
Ver 1.3 2001.07
AEP Model UK Model Tourist Model
Photo: black
U.S. and foreign patents licensed from Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism CD Section CD Mechanism Type Optical Pick-up Name Model Name Using Similar Mechanism MD Section MD Mechanism Type Base Unit Name Optical Pick-up Name
ZS-M50 KSM-213CDM KSS-213C PMC-MD55 MDM-5GA MBU-5A KMS-260B
SPECIFICATIONS
CD player section System Compact disc digital audio system Laser diode properties Material: GaAlAs Wave length: 785 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.) Spindle speed 200 r/min (rpm) to 500 r/min (rpm) (CLV) Number of programme positions 2 Frequency response 20 - 20,000 Hz +1/2 dB Wow and flutter Below measurable limit Radio section Frequency range FM: 87.5 - 108 MHz MW: 531 - 1,602 kHz LW: 153 - 279 kHz IF FM: 10.7 MHz MW/LW: 450 kHz Aerials FM: Telescopic aerial External aerial terminal MW/LW: External aerial terminals MD player section System Minidisc digital audio system Disc MiniDisc Laser diode properties Material: GaAlAs Wave length: 785 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.) Recording/playback time Stereo recording: Maximum 80 minutes (with MDW-80) Monaural recording: Maximum 160 minutes (with MDW-80) Revolutions 400 rpm to 900 rpm (CLV) Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 44.1 kHz
Continued on next page
PERSONAL MINIDISC SYSTEM
9-927-183-13
2001G0400-1 © 2001.7
Sony Corporation
Personal Audio Company Shinagawa Tec Service Manual Production Group
1
Coding Adaptive TRansform Acoustic Coding (ATRAC) Modulation system EFM (Eight-to-Fourteen Modulation) Number of programme positions 2 stereo programme positions Frequency response 20 - 20,000 Hz +1/2 dB Signal-to-noise ratio Over 80 dB (during playback) Wow and flutter Below measurable limit General Speaker Full-range: 8 cm (3 in.) dia.,4 ohms, cone type (2) Inputs LINE IN (stereo minijack):Sensitivity 436 mV/ 870 mV Outputs Headphones jack (stereo minijack) (1): For 32 ohms impedance headphones Maximum power output 5W+5W Power requirements For personal minidisc system: 230 V AC, 50 Hz For back-up memory: 4.5 V DC, 3 R6 (size AA) batteries For remote control: 3 V DC, 2 R6 (size AA) batteries Power consumption 24 W Dimensions (incl.projecting parts)
approx. 498.5 × 173.5 × 227 mm (w/h/d) (19 3/4 × 6 7/8 × 11 inches) Mass approx. 5.2 kg (11 lb. 7 oz) Supplied accessories Mains lead (1) Remote control (RMT-CM35AD) (1) MW/LW loop aerial (1)
Design and specifications are subject to change without notice.
2
TABLE OF CONTENTS 1. SERVICING NOTES
1-1. Notes on Handling the Optical Pick-up Block or Base Unit .. 4 1-2. Notes on Laser Diode Emission Check ............................... 4 1-3. Notes on Chip Component Replacement ............................ 4 1-4. Flexible Circuit Board Repairing ........................................ 4 1-5. Chuck Plate Jig on Repairing .............................................. 4 1-6. Demonstration ..................................................................... 4 1-7. Checking the Laser Diode and Focus Search Operation ..... 4 1-8. Jig for Checking BD Board Waveform ............................... 5 1-9. Checks Prior to Parts Replacement and Adjustments ......... 6 1-10. Change of Pulley ................................................................. 6
6. DIAGRAMS
6-1. IC Pin Function Descriptions ............................................ 35 6-2. Circuit Boards Location .................................................... 44 6-3. Block Diagram Tuner Section ....................................... 45 6-4. Block Diagram MD Section .......................................... 48 6-5. Block Diagram CD Section ........................................... 51 6-6. Block Diagram Audio Section ...................................... 53 6-7. Schematic Diagram CD Section (1/2) ........................... 55 6-8. Schematic Diagram CD Section (2/2) ........................... 57 6-9. Printed Wiring Boards CD Section ............................... 59 6-10. Printed Wiring Boards Tuner Section ........................... 61 6-11. Schematic Diagrams Tuner Section .............................. 63 6-12. Printed Wiring Boards BD Section ............................... 65 6-13. Schematic Diagram BD Section (1/2) ........................... 67 6-14. Schematic Diagrams BD Section (2/2) ......................... 69 6-15. Schematic Diagram DG Section ................................... 71 6-16. Schematic Diagram DG Section ................................... 73 6-17. Printed Wiring Board DG Section ................................. 75 6-18. Printed Wiring Board Main Section .............................. 77 6-19. Schematic Diagram Main Section (1/3) ........................ 79 6-20. Schematic Diagram Main Section (2/3) ........................ 81 6-21. Schematic Diagram Main Section (3/3) ........................ 83 6-22. Printed Wiring Boards Panel Section ............................ 85 6-23. Schematic Diagrams Panel Section ............................... 87 6-24. Printed Wiring Boards Switch Section .......................... 89 6-25. Schematic Diagrams Switch Section ............................ 91 6-26. Printed Wiring Boards Power Supply Section .............. 93 6-27. Schematic Diagrams Power Supply Section ................. 95 6-28. IC Block Diagrams ............................................................ 97
2. GENERAL
Playing a CD ....................................................................... 7 Recording a whole CD ........................................................ 7 Playing an MD ..................................................................... 8 Listening to the radio ........................................................... 8
3. DISASSEMBLY
3-1. Cabinet (Rear) Assy ............................................................ 9 3-2. Power Board ........................................................................ 9 3-3. Cabinet (Upper) Assy ........................................................ 10 3-4. MD Block Assy ................................................................. 10 3-5. Tuner Board ....................................................................... 11 3-6. Jack Board ......................................................................... 11 3-7. LED Board ........................................................................ 12 3-8. Key Board ......................................................................... 12 3-9. Top Board .......................................................................... 13 3-10. FL Board ........................................................................... 13 3-11. Main board ........................................................................ 14 3-12. CD Board .......................................................................... 14 3-13. CD Mechanism Block ....................................................... 15 3-14. DG Board .......................................................................... 15 3-15. Plate (Front), Shield .......................................................... 16 3-16. MD Mechanism Block-1 (MDM-5GA) ............................ 16 3-17. MD Mechanism Block-2 (Slider (Cam) Assy) ................. 17 3-18. MD Mechanism Block-3 (BD Board) ............................... 18 3-19. MD Mechanism Black-4 (SW Board) ............................... 18
7. EXPLODED VIEWS
7-1. 7-2. 7-3. 7-4. 7-5. 7-6. 7-7. Cabinet (Rear) Section .................................................... 103 Cabinet (Front) Section ................................................... 104 Cabinet (Upper) Section .................................................. 105 MD Block Section ........................................................... 106 MD Mechanism Section (MDM-5GA) .......................... 107 MD Base unit Section (MBU-5A) ................................. 108 Optical Pick-up Section (KSM-213CDM) ...................... 109
4. TEST MODE
4-1. MD section ........................................................................ 19
8. ELECTRICAL PARTS LIST .................................... 110
5. ELECTRICAL ADJUSTMENTS
5-1. Tuner section ..................................................................... 24 5-2. MD section ........................................................................ 26 5-3. CD section ......................................................................... 33
3
SECTION 1 SERVICING NOTES
This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior.
1-5. CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig. · Code number of Chuck Plate Jig: X-4918-255-1
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
1-1. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.
1-6. DEMONSTRATION
This set enters the demonstration mode about 10 seconds after the power cord is connected. The demonstration displays such as "DEMONSTRATION MODE" and "CREATE YOUR ORIGINAL MD" then appears. When no operation is entered for one minute after the [OPERATE] button is turned on, the demonstration mode is also entered. To release the demonstration mode, set the timer in this set or press and hold down the [NO/CANCEL] button for about 2 seconds.
1-7. CHECKING THE LASER DIODE AND FOCUS SEARCH OPERATION
1. Turn on the POWER and open the CD cover. 2. As shown below, push S402 (CD DOOR) with a screwdriver or other tool. 3. Press the CD button. 4. Check the objective lens to make sure that the laser diode is emitting light. If not so, the auto power control circuit or optical pickup would be damaged. Verify that the objective lens moves vertically three times for focus search.
1-2. NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
1-3. NOTES ON CHIP COMPONENT REPLACEMENT
· Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat.
1-4. FLEXIBLE CIRCUIT BOARD REPAIRING
· Keep the temperature of the soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
S402
4
1-8. JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. GND : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TEO : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter)
Mechanism deck
CN110 6P connector
5P connector
RF
VC TEO IOP I+3V GND
RF VC TEO IOP I+3V GND
1 RF VC TEO for MDM-3 IOP 5 I+3V 1 VC RF TEO for MDM-5 IOP I+3V 6 GND
5
1-9. CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS (FOR MD SECTION)
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in "5 Electrical Adjustments". Criteria for Determination (Unsatisfactory if specified value is not satisfied) Laser power check (6-1 : See page 28) · 0.9 mW power Specified value : 0.84 to 0.92 mW · 7.0 mW power Specified value : 6.8 to 7.2 mW lop (at 7mW) · Labeled on the optical pickup Iop value ± 10mA Focus bias check (6-2 : See page 28) · Error rate check Specified value : For points a, b, and c C1 error : About 200 ADER : Below 2 · Error rate check Specified value: a. When using test disc (MDW-74/AU-1) C1 error : Below 80 ADER : Below 2 b. When using check disc (TDYS-1) C1 error : Below 50 · CPLAY error rate check Specified value: C1 error : Below 80 ADER : Below 2 Measure if unsatisfactory: · Clean the optical pick-up · Adjust again · Replace the optical pick-up · Replace the optical pick-up
· Replace the optical pick-up
C PLAY check (6-3 : See page 28)
· Replace the optical pick-up
Self-recording/playback check (6-4 : See page 28)
If always unsatisfactory: · Replace the overwrite head · Check for disconnection of the circuits around the overwrite head If occasionally unsatisfactory: · Check if the overwrite head is distorted · Check the mechanism around the sled
Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.
1-10. CHANGE OF PULLEY
pulley
M102, 103
2.5 mm
Install the pulley to the motor.
6
SECTION 2 GENERAL
Playing a CD
This section is extracted from instruction manual.
Use these buttons for additional operations
3
1, 2
., >
CD u CDx
Z PUSH OPEN/CLOSE
VOLUME , + OPERATE
For hookup instructions, see pages 64 - 67.
1
Press Z PUSH OPEN/CLOSE down to open the CD compartment and place the CD on the CD compartment.
Tip Next time you want to listen to a CD, just press CD u . The player turns on automatically and starts playing the CD.
To adjust the volume stop playback pause playback
Press VOLUME +, (VOL +, on the remote) CD x CD u (CD X on the remote) Press the button again to resume play after pause. > . Z PUSH OPEN/CLOSE O P E R AT E
go to the next track go back to the previous track remove the CD
With the label side up
turn on/off the player
2
Close the lid of the CD compartment.
3
Press CD u (CD N on the remote). The player turns on (direct power-on) and the player plays all the tracks once.
Display
Track number
Playing time
Recording a whole CD
(Synchronized recording)
4 2 5
To record at high speed, press HIGH SPEED. The indicator lights up. To record at normal speed, skip this step. Press SYNCHRO REC CD N MD. The player starts recording automatically. If the MD has any previous recording, recording will be made from the last recorded position.
Track number of MD Remaining recording time of MD
4
5
3
1
Notes After you stop recording, do not disconnect the mains lead or move the player while "TOC EDIT" is flashing in the display. If you do so, recording may not be done properly. · When you record a whole CD, you cannot pause recording. Tips · Adjusting the volume or the audio emphasis (page 56) will not affect the recording level. Keep the volume at a moderate level so as to prevent the sound from skipping. · To record over the previous recording, see page 40. · Once the clock is set, the recording date and time are stamped automatically (page 57). · You can label an MD or a track during recording (page 51). ·
Use these buttons for additional operations
OPERATE CD x MD x
For hookup instructions, see pages 64 - 67.
1
Insert a recordable MD (direct power-on).
Display
MD
With the label side up Insert in the direction of arrow
After "TOC Reading" is displayed, the disc name will be displayed if it is labelled.
YES ENTER
NO CANCEL
2
To stop recording turn on/off the player
Press MD x or CD x O P E R AT E
Press Z PUSH OPEN/CLOSE and place the CD on the CD compartment. Press Z PUSH OPEN/CLOSE again to close the CD compartment.
With the label side up
3
If "CD>MD OK?" alternates with time display There is not enough space on the MD to record the whole CD. If it is all right to record as much as possible and cancel recording of some tracks, press YES·ENTER. To stop recording, press NO·CANCEL. If any other messages are displayed, see page 80.
Press CD x .
7
Playing an MD
Use these buttons for additional operations
1
2
.. >
MD u
MD x
VOLUME , +
OPERATE
Z
For hookup instructions, see pages 64 - 67.
1
Tip Next time you want to listen to a MD, just press MD u. The player turns on automatically and starts playing the
To adjust the volume stop playback pause playback MD.
Press VOLUME +, (VOL +, on the remote) MD x MD u (MD X on the remote) Press the button again to resume play after pause. > . Z O P E R AT E
Insert the MD (direct power-on).
Display
go to the next track After "TOC Reading" is displayed, the disc name will be displayed if it is labelled. go back to the previous track remove the MD turn on/off the player
With the label side up Insert in the direction of the arrow
2
Press MD u (MD N on the remote). The player plays all the tracks once.
Track name is displayed
m
Track number
Playing time
Listening to the radio
Use these buttons for additional operations
2
1
OPERATE
VOLUME , +
MONO/ST REPEAT
For hookup instructions, see pages 64 - 67.
1
Press RADIO BAND until the band you want appears in the display (direct power-on).
Display
"FM1", "FM2", "MW" or "LW"appears
2
Hold down TUNE + or TUNE until the frequency digits begin to change in the display. The player automatically scans the radio frequencies and stops when it finds a clear station. If you can't tune in a station, press TUNE + or TUNE repeatedly to change the frequency step by step.
Indicates an FM stereo broadcast
Tips · The "FM1" and "FM2" bands have the same functions. You can store the stations you want separately in "FM1" and "FM2" (page 22). · If the FM broadcast is noisy, press MONO/ ST·REPEAT (MODE on the remote) until "Mono" appears in the display and radio will play in monaural. · N ext time you want to listen to the radio, just press RADIO BAND. The player turns on automatically and starts playing the previous station.
To adjust the volume turn on/off the radio
Press VOLUME +, (VOL +, on the remote) O P E R AT E
To improve broadcast reception FM: Set the FM ANTENNA SELECTOR at the rear of the player to " " (telescopic aerial). Reorient the aerial for FM.
MW/LW: Keep the MW/LW loop aerial as far as possible from the player and reorient it.
If the broadcast is still noisy, connect the external aerial (page 67).
8
SECTION 3 DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
Set
Cabinet (Rear) Assy
Cabinet (Upper) Assy Power Board Tuner Board
FL Board Top Board MD Block Assy
Main Board
CD Board
CD Mechanism Block
Jack Board
DG Board LED Board Key Board MD Mechanism Block - 1 (MDM-5GA) MD Mechanism Block - 2 (Slider (Cam) Assy) MD Mechanism Block - 3 (BD Board) MD Mechanism Block - 4 (SW board) Plate (Front), Shield
Note : Follow the disassembly procedure in the numerical order given.
3-1. CABINET (REAR) ASSY
7 CN401 6 CN402 1 BVTP 3x12 handle
2 BVTP 3x14
8 cabinet (rear) assy 5 BVTP 3x14
3 BVTP 3x14 4 BVTP 3x12
3-2. POWER BOARD
cabinet (rear) assy
1 BVTP 3x12
chassis, transformer
3 BVTP 4x12
5
4 BVTP 3x12 6 POWER board
2 CN903
9
3-3. CABINET (UPPER) ASSY
qacabinet (upper) assy 2 CN705 3 CN404 4 connector
9 CN406 q; CN409 8 CN407 7 CN303 6 CN408 5 CN301 1 BVTP 3x10
3-4. MD BLOCK ASSY
3 MD block assy
2 BVTP 3x14
1 CN2
10
3-5. TUNER BOARD
1 BVTP 3x10 chassis (TU)
4 BVTP 3x10 2 BVTP 3x10
8 Remove the solders.
5 TUNER board
6 BVTP 3x10 7 ANTENNA SW board 3 BVTP 3x10
3-6. JACK BOARD
1 BVTP 2.6x8
3 JACK board
2 CN306
11
3-7. LED BOARD
1 BVTP 2.6x8 2 BVTP 2.6x8
3 LED board
3-8. KEY BOARD
1 BVTP 2.6x8
2 BVTP 2.6x8
3 KEY board
12
3-9. TOP BOARD
2
1 BVTP 2.6x8
5 TOP board
4 button (top) assy
3 BVTP 2.6x8
3-10. FL BOARD
1 CN405
3 FL board 2 BVTP 3x10
13
3-11. MAIN BOARD
5 BVTP 3x10 1 CN410 6 BVTP 3x10 4 BVTP 3x10
8 MAIN board
7 CN403
2 CN707
3 CN704 CD board
3-12. CD BOARD
1 CN801 3 BVTP 3x10
2 BVTP 3x10
4 CN701
5 CD board
14
3-13. CD MECHANISM BLOCK
1 PWH 2.6x10 2 PWH 2.6x10 3
4 CD mechanism block
3-14. DG BOARD
1 P 2.6x5
2 plate (lower) assy, shield 5 CN605 6 CN603 4 P 2.6x5 7 q; DG board 8 CN602 3 P 2.6x5
9 CN601
claws
15
3-15. PLATE (FRONT), SHIELD
3 plate (front), shield
2 P 2.6x5
1 P 2.6x5
3-16. MD MECHANISM BLOCK-1 (MDM-5GA)
3 claws 5 shield (upper) 6 BVTTWH M3 7 BVTTWH M3 9 MD mechanism block (MDM-5GA)
4 claws
8 harnes 1 P 2.6x5 2 P 2.6x5
16
3-17. MD MECHANISM BLOCK-2 (SLIDER (CAM) ASSY)
6 slider (cam) assy
3 bracket (guide L) 1 BV 2.6 (1T3B)
2 spring, leaf 4 BV 2.6 (1T3B)
5 bracket (guide R)
horizontal When assembling, set the press fitting shaft of the cam gear horizontal to the lever (head). press fitting shaft lever (head) cam gear
A When assembling, insert the shaft of the lever (O/C) with A part fit in the slot.
17
3-18. MD MECHANISM BLOCK-3 (BD BOARD)
2 MD base unit 5 CN104 BD board (side A)
6 CN101 1 BV 2.6 (1T3B)
3 Removal the solders 7 BD board 4 M 1.7
3-19. MD MECHANISM BLOCK-4 (SW BOARD)
2 gear (B) 1 PTPWH M 2.6x6
3 PWH 1.7x4
4 motor assy, loading 6 SW board
5 BTP 2.6x6
18
SECTION 4 TEST MODE
Refer to "5. ELECTRICAL ADJUSTMENT" for the test mode of CD section.
4-1. MD SECTION 1. PRECAUTIONS FOR USE OF TEST MODE
· As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the Z (MD) button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the Z (MD) button after pressing the [REC/REC MODE] button and the rotation of disc is stopped. 1-1. Recording laser emission mode and operating buttons · Continuous recording mode (CREC MODE) · Laser power check mode (LDPWR CHECK) · Laser power adjustment mode (LDPWR ADJUST) · When pressing the [REC] button.
2. SETTING THE TEST MODE
1. Set to standby state. 2. Press the buttons [SOUND] and [EDIT] and . (TUNE ) at the same time and then release them soon (within 100m sec). The TEST MODE is entered.
3. RELEASING THE TEST MODE
Hold down the [OPERATE] button and remove the power cord to reset the set.
4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed with the following buttons: u (MD), x (MD), [RADIO/BAND], and [REC/REC MODE]. The functions of these buttons are as follows. Function name u (MD) x (MD) RADIO/BAND REC/REC MODE Function Proceeds the parameter/mode change. Returns to the parameter/mode change. Goes ahead. Determines the setting/selection. Suspends.
19
5. SELECTING THE TEST MODE
There are 9 types of test modes as shown below. The groups can be switched by press the u (MD) or x (MD) button. After selecting the group to be used, press the [RADIO/BAND] button. After setting a certain group, press the u (MD) or x (MD) button between these modes. Display TEMP ADJUST LDPWR ADJUST LDPWR CHECK EFBAL ADJUST FBIAS ADJUST FBIAS CHECK CPLAY MODE CREC MODE EEP MODE Contents Temperature compensation offset adjustment Laser power adjustment Laser power check EF balance adjustment Focus bias adjustment Focus bias check Continuous playback mode Continuous recording mode Non-volatile memory control
· For details of each adjustment mode, refer to "5. Electrical Adjustments". · If a different mode has been selected by mistake, press the [REC/REC MODE] button to release that mode. · EEP MODE is not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the [REC/REC MODE] button to release the mode immediately. Be especially careful this mode will overwrite the non-volatile memory and reset it, and as a result, the unit will not operate normally.
20
5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode (1) Set the disc in the unit. (Whichever recordable discs or discs for playback only are available) (2) Press the u (MD) or x (MD) button to display "CPLAY MODE". (3) Press the [RADIO/BAND] button to change the display to "CPLAY MID". AD = ". (4) When access completes, the display changes to "C1 = Note: The numbers " " displayed show you error rates and ADER. 2. Changing the parts to be played back (1) Press the [RADIO/BAND] button during continuous playback to change the display as below. "CPLAY MID" t "CPLAY OUT" t "CPLAY IN" When pressed another time, the parts to be played back can be moved. When access completes, the display changes to "C1 = AD = ". Note: The numbers " " displayed show you error rates and ADER. 3. Ending the continuous playback mode (1) Press the [REC/REC MODE] button. The display will change to "CPLAY MODE". (2) Press the Z (MD) button and take out the disc. Note: The playback start addresses for IN, MID, and OUT are as follows. IN : 40h cluster MID : 300h cluster OUT : 700h cluster
(2)
5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check) 1. Entering the continuous recording mode (1) Set a recordable disc in the unit. (2) Press the u (MD) or x (MD) button to display "CREC MODE". (3) Press the [RADIO/BAND] button to change the display to "CREC MID". )" and "[REC] " lights up. (4) When access completes, the display changes to "CREC ( Note: The numbers " " displayed shows you the recording position addresses. 2. Changing the parts to be recorded (1) When the [RADIO/BAND] button is pressed during continuous recording, the display changes as below. "CREC MID" t "CREC OUT" t "CREC IN" When pressed another time, the parts to be recorded can be changed. "[REC]" goes off. )" and "[REC] " lights up. When access completes, the display changes to "CREC ( Note: The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode (1) Press the [REC/REC MODE] button. The display changes to "CREC MODE" and "[REC] " goes off. (2) Press the Z (MD) button and take out the disc. Note 1: The recording start addresses for IN, MID, and OUT are as follows. IN : 40h cluster MID : 300h cluster OUT : 700h cluster Note 2: The [REC/REC MODE] button can be used to stop recording anytime. Note 3: Do not perform continuous recording for long periods of time above 5 minutes. Note 4: During continuous recording, be careful not to apply vibration. (2) 5-3. Non-Volatile Memory Mode (EEP MODE) This mode reads and writes the contents of the non-volatile memory. It is not used in servicing. If the unit entered this mode accidentally, press the [REC/REC MODE] button immediately to release it.
21
6. FUNCTIONS OF OTHER BUTTONS
Function u (MD) and EDIT x (MD) and EDIT > . REC/REC MODE and EDIT x (CD) and EDIT RADIO/BAND and EDIT LINE/LINE LEVEL Z (MD) OPERATE Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. When pressed during continuous playback, REC ON/OFF. Switches between the pit and groove modes when pressed. When pressed during continuous playback, switches the spindle servo mode (CLV-S y CLV-A). Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode
7. TEST MODE DISPLAYS
Each time the [LINE/LINE LEVEL] button is pressed, the display changes in the following order. 1. Mode display Displays "TEMP ADJUST", "CPLAYMODE", etc. 2. Error rate display Displays the error rate in the following way. C1 = ssss AD = ss C1 = Indicates the C1 error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO: recordable disc, CD: playback only disc) Press the x (CD) and [EDIT] buttons at the same time to switches between the groove display and pit display. h = ssss s = ssss (MO pit and CD) h = ssss a = ssss (MO groove) h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address. Note: "" is displayed when servo is not imposed. 4. Auto gain display (Not used in servicing) The auto gain is displayed as follows. AG F = ss T = ss 5. IVR display (Not used in servicing) The IVR is displayed as follows. [ss][ss][ss] Mode display Error rate display Address display Auto gain display (Not used in servicing) IVR display (Not used in servicing)
22
MEANINGS OF OTHER DISPLAYS Display SHUF PGM Contents When Lit During continuous playback (CLV: ON) Tracking servo OFF Recording mode ON ABCD adjustment completed Pit CLV-S When Off STOP (CLV: OFF) Tracking servo ON Recording mode OFF Groove CLV-A
[REC]
TOC EDIT TRACK TIMER
23
SECTION 5 ELECTRICAL ADJUSTMENTS
5-1. TUNER SECTION 0 dB = 1 µV
AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T1 450 kHz MW FREQUENCY COVERAGE ADJUSTMENT Frequency Display
Put the lead-wire antenna close to the supplied MW/LW loop aerial.
Precautions in Repairing Note : As a tuner unit (TU1) is difficult to repair if faulty, replace it with new one. · MW/LW Section Setting: BAND button: MW or LW
AM RF signal generator
531 kHz 1.0 ± 0.3 V L5
1,611 kHz 5.3 ± 0.3 V CT4
Reading on Digital voltmeter Adjustment Part
30% amplitude modulation by 400 Hz signal output level : as low as possible
MW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L3 CT2 1,404 kHz
· FM Section Setting: BAND button: FM
FM RF signal generator FM antenna (JW1,2) 0.01 µF set
621 kHz
FM FREQUENCY COVERAGE CHECK Frequency Display Reading on Digital voltmeter Adjustment Part 87.5 MHz 1.4 + 0.6 V 0.4 V 108 MHz 6.9 + 1.1 V 1.0 V
FM TRACKING CHECK
22.5 kHz frequency deviation by 400 Hz signal output level : as low as possible
Adjust for a maximum reading on level meter. · Connecting Level Meter (FM, MW and LW)
level meter (range: 0.5-5 V ac) 32 set
87.5 MHz
108 MHz
LW FREQUENCY COVERAGE ADJUSTMENT Frequency Display 153 kHz 0.7 + 0.5 V 0.2 V 279 kHz 5.3 ± 0.2 V CT3
i jack (J301)
Reading on Digital voltmeter Adjustment Part
· Connecting Digital Voltmeter (FM, MW and LW)
digital voltmeter tuner board TP (VT)
LW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L4 162 kHz CT1 261 kHz
Adjustment Location: TUNER board (See page 25.)
· Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.
24
Adjustment Location:
(COMPONENT SIDE)
JW1 JW2 T1 AM IF ADJUSTMENT
CT4 L5 LW TRACKING ADJUSTMENT L4 CT1
MW FREQUENCY COVERAGE ADJUSTMENT
CT3 LW FREQUENCY COVERAGE ADJUSTMENT TP(VT)
L3 CT2
MW TRACKING ADJUSTMENT
25
5-2. MD SECTION 1. PARTS REPLACEMENT AND ADJUSTMENT
· Check and adjust the mechanism deck as follows. The procedure changes according to the part replaced. · Abbreviation OP : Optical pick-up OWH : Overwrite head
· Laser power check · Focus bias check · C PLAY check · Self-recording/playback check
OK
NG Check the sled and spindle mechanisms. Other causes can be suspected.
Parts Replacement and Repair
Has the OWH been replaced?
YES
NO
Has OP, IC171, IC101, or IC121 been replaced?
NO
YES
Initial setting of the adjustment value
Has OP or IC171 been replaced?
NO
YES
IOP information recording (IOP value labeled on OP)
Has IC171 or D101 been replaced? YES
NO
Temperature compensation offset adjustment
· Laser power adjustment · Traverse adjustment · Focus bias adjustment · Error rate adjustment · Focus bias check · Auto gain adjustment
26
2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
3. PRECAUTIONS FOR USE OF OPTICAL PICK-UP (KMS-260B)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
pick-up flexible board
4. Use the following tools and measuring device. · Check Disc (MD) TDYS-1 (Part No. 4-963-646-01) · Test Disc (MDW-74/AU-1) (Part No. 8-892-341-41) · Laser power meter LPM-8001 (Part No. J-2501-046-A) or MD Laser power meter 8010S (Part No. J-2501-145-A) · Oscilloscope (Measure after performing CAL of prove) · Digital voltmeter · Thermometer · Jig for checking BD board waveform (Part No. : J-2501-149-A) 5. When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited) 6. Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Notes on page 5) 7. As the disc used will affect the adjustment results, make sure that not dusts nor fingerprints are attached to it. Laser Power Meter When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. J-2501-145-A) instead of the conventional laser power meter is convenient. It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.
laser tap
Optical pick-up flexible board
4. PRECAUTIONS FOR ADJUSTMENTS
1. When replacing the following parts, perform the adjustments and checks with in the order shown in the following table.
Optical Pick-up IC171 1.Temperature compensation offset adjustment 2.Laser power adjustment 3.EF balance adjustment 4.Focus bias adjustment 5.Error rate check BD Board D101 IC101, IC121 IC192
5. CREATING CONTINUOUSLY-RECORDED DISC
* This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. 2. Press the u (MD) or x (MD) button to display "CREC MODE". 3. Press the [RADIO/BAND] button again to display "CREC MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the [REC/REC MODE] button and stop recording. 6. Press the Z (MD) button and remove the disc. The above has been how to create a continuous recorded data for the focus bias adjustment/check and MO error rate check.
Note: · Be careful not to apply vibration during continuous recording.
2. Set the test mode when performing adjustments. After completing the adjustments, release the test mode. Perform the adjustments and checks in "group S" of the test mode. 3. Perform the adjustments to be needed in the order shown.
27
6. CHECK PRIOR TO REPAIRS
These checks are performed before replacing parts according to "approximate specifications" to determine the faulty locations. For details, refer to "Checks Prior to Parts Replacement and Adjustments" (See page 6). 6-1. Laser Power Check Connection:
laser power meter
Optical pick-up objective lens
digital voltmeter BD board CN110 pin 5 (I +3V) CN110 pin 4 (IOP)
+
6-2. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure: 1. Load the test disc (MDW-74/AU-1). 2. Press the u (MD) or x (MD) button to display "CPLAY MODE". 3. Press the [RADIO/BAND] button twice to display "CPLAY MID". AD = " 4. Press the [REC/REC MODE] button when "C1 = is displayed. 5. Turn the JOG dial to display "FBIAS CHECK". 6. Press the [RADIO/BAND] button to display " / c = ". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 50 and ADER is below 2. 7. Press the [RADIO/BAND] button to display " / b = ". Check that the C1 error is about 200 and ADER is below 2. / a = ". 8. Press the [RADIO/BAND] button to display " Check that the C1 error is about 200 and ADER is below 2. 9. Press the [REC/REC MODE] button, then press the Z (MD) button and take out the test disc. 6-3. C PLAY Check MO Error Rate Check Checking Procedure: 1. Load the test disc (MDW-74/AU-1). 2. Press the u (MD) or x (MD) button to display "CPLAY MODE". 3. Press the [RADIO/BAND] button to display "CPLAY MID". 4. The display changes to "C1 = AD = ". 5. If the C1 error rate is below 80, check that ADER is below 2. 6. Press the [REC/REC MODE] button to stop playback, then press the Z (MD) button and take out the test disc. CD Error Rate Check Checking Procedure: 1. Load the check disc (MD) TDYS-1. 2. Press the u (MD) or x (MD) button to display "CPLAY MODE". 3. Press the [RADIO/BAND] button twice to display "CPLAY MID". 4. The display changes to "C1 = AD = ". 5. Check that the C1 error rate is below 50. 6. Press the [REC/REC MODE] button to stop playback, then press the Z (MD) button and take out the check disc. 6-4. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure: 1. Load a recordable disc (blank disc). 2. Press the u (MD) or x (MD) button to display "CREC MODE". 3. Press the [RADIO/BAND] button to display "CREC MID". 4. When recording starts, lights up "[REC]" and display "CREC @@@@" (@@@@ is the address). 5. About 1 minute later, press the [REC/REC MODE] button to stop continuous recording. 6. Turn the JOG dial to display "CPLAY MODE". 7. Press the [RADIO/BAND] button to display "CPLAY MID". 8. "C1 = AD = " will be displayed. 9. Check that the C1 error becomes below 80 and the ADER below 2. 10. Press the [REC/REC MODE] button to stop play back, then press the Z (MD) button and take out the disc.
Note: After the TEST MODE is entered, insert the disc.
Checking Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the . button or > button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3 V) and CN110 pin 4 (IOP) on the BD board. 2. Press the u (MD) or x (MD) button to display "LDPWR CHECK". 3. Press the [RADIO/BAND] button once to display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.84 to 0.92 mW. 4. Press the [RADIO/BAND] button once more to display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Specified Value: Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label ± 10 %
(Optical pick-up label) KMS260B 27X40 B0825 lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the [REC/REC MODE] button to display "LDPWR CHECK" and stop the laser emission. (The [REC/REC MODE] button is effective at all times to stop the laser emission)
Note 1: After step 4, each time the [RADIO/BAND] button is pressed, the display will be switched "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD WP $ ". Nothing needs to be performed here. ( = correction)
28
7. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT
Save the temperature data at that time in the non-volatile memory as 25 °C reference data.
Note: 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to 28 °C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 °C to 28 °C. 3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature.
7. Then, press the u (MD) or x (MD) to display "LDPWR CHECK". 8. Press the [RADIO/BAND] button once to display "LD 0.9mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the [RADIO/BAND] button once more to display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital voltmeter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value: Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : Value on the optical pick-up label ± 10%
(Optical pick-up label) KMS260B 27X40 B0825 lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
Adjusting Procedure: 1. Press the u (MD) or x (MD) button to display "TEMP ADJUST". 2. Press the [RADIO/BAND] button to select the "TEMP ADJUST" mode. 3. "TEMP = " and the current temperature data will be displayed. 4. To save the data, press the [RADIO/BAND] button. When not saving the data, press the [REC/REC MODE] button. 5. When the [RADIO/BAND] button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" display then. When the [REC/REC MODE] button is pressed, "TEMP ADJUST" will be displayed immediately. Specified Value: The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
10. Press the [REC/REC MODE] button to display "LDPWR CHECK" and stop the laser emission. (The [REC/REC MODE] button is effective at all times to stop the laser emission)
Note 1: After step 9, each time the [RADIO/BAND] button is pressed, the display will be switched "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD WP $ ". Nothing needs to be performed here. ( = correction)
8. LASER POWER ADJUSTMENT
Connection:
laser power meter
Optical pick-up objective lens digital voltmeter BD board CN110 pin 5 (I +3V) CN110 pin 4 (IOP)
+
Adjusting Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the . button or > button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3 V) and CN110 pin 4 (IOP) on the BD board. 2. Press the u (MD) or x (MD) button to display "LDPWR ADJUST". (Laser power: For adjustment) 3. Press the [RADIO/BAND] button once to display "LD 0.9 mW $ ". 4. Press the u (MD) or x (MD) button so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the [RADIO/BAND] button after setting the range knob of the laser power meter, and save the adjustment results. ("LD SAVE $ " will be displayed for a moment) 5. Then "LD 7.0 mW $ " will be displayed. 6. Press the u (MD) or x (MD) button and adjust so that the reading on the laser power meter is 6.9 to 7.1 mV. Press the [RADIO/BAND] button to save the setting.
Note: Do not perform the emission with 7.0 mW more than 15 seconds continuously.
29
9. EF BALANCE ADJUSTMENT
Note 1: Data will be erased during MO reading if a recorded disc is used in this adjustment. Note 2: If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly. oscilloscope (DC range) BD board CN110 pin 3 (TEO) CN110 pin 1 (VC) 10 pF 330 k
+
8. Press the u (MD) or x (MD) button so that the waveform of the oscilloscope becomes the specified value. (When the JOG dial is turned, the of "EFB- " changes and the waveform changes) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment)
Traverse Waveform
A VC B Specification A = B
Connection:
oscilloscope (DC range) BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
+
V: 0.1 V/div H: 10 ms/div
Adjusting Procedure: 1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110 pin 1 (VC) on the BD board. 2. Load a disc (any available on the market). (Refer to Note 1) 3. Press the > button to move the optical pick-up outside the pit. 4. Press the u (MD) or x (MD) button to display "EFBAL ADJUST". 5. Press the [RADIO/BAND] button to display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON) 6. Press the u (MD) or x (MD) button so that the waveform of the oscilloscope becomes the specified value. (When the u (MD) or x (MD) button is pressed, the of "EFB = " changes and the waveform changes ) In this adjustment, waveform varies at intervals of approx. 2 %. Adjust the waveform so that the specified value is satisfied as much as possible. (Read power traverse adjustment)
Traverse Waveform
A VC B Specification A = B
9. Press the [RADIO/BAND] button, and save the adjustment results in the non-volatile memory. ("EFB = SAVE" will be displayed for a moment) MO-P" will be displayed. 10. "EFB = The optical pick-up moves to the pit area automatically and servo is imposed. 11. Press the u (MD) or x (MD) button until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
Traverse Waveform
A VC B Specification A = B
7. Press the [RADIO/BAND] button and save the result of adjustment to the non-volatile memory. ("EFB = SAVE" will be displayed for a moment. Then "EFB = MO-W" will be displayed)
12. Press the [RADIO/BAND] button, and save the adjustment results in the non-volatile memory. ("EFB = SABE" will be displayed for a moment) Next "EFBAL ADJUST" is displayed. The disc stops rotating automatically. 13. Press the Z (MD) button and take out the disc. 14. Load the check disc (MD) TDYS-1. 15. Press the [RADIO/BAND] button to display "EFB = CD". Servo is imposed automatically. 16. Turn the JOG dial so that the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.
Traverse Waveform
A VC B Specification A = B
30
17. Press the [RADIO/BAND] button, display "EFB = SAVE" for a moment and save the adjustment results in the non-volatile memory. Next "EFBAL ADJUST" will be displayed. 18. Press the Z (MD) button and take out the disc.
11. ERROR RATE CHECK
11-1. CD Error Rate Check Checking Procedure: 1. Load the check disc (MD) TDYS-1. 2. Press the u (MD) or x (MD) button and display "CPLAY MODE". 3. Press the [RADIO/BAND] button twice and display "CPLAY MID". = AD = ". 4. The display changes to "C1 5. Check that the C1 error rate is below 20. 6. Press the [REC/REC MODE] button to stop playback, then press the Z (MD) button and take out the check disc. 11-2. MO Error Rate Check Checking Procedure: 1. Load the continuously-recorded disc. (Refer to "5. CREATING CONTINUOUSLY-RECORDED DISC") 2. Press the u (MD) or x (MD) button to display "CPLAY MODE". 3. Press the [RADIO/BAND] button to display "CPLAY MID". = AD = ". 4. The display changes to "C1 5. If the C1 error rate is below 50, check that ADER is 00. 6. Press the [REC/REC MODE] button to stop playback, then press the Z (MD) button and take out the test disc.
10. FOCUS BIAS ADJUSTMENT
Adjusting Procedure: 1. Load the continuously-recorded disc. (Refer to "5. CREATING CONTINUOUSLY-RECORDED DISC") 2. Press the u (MD) or x (MD) button to display "CPLAY MODE". 3. Press the [RADIO/BAND] button to display "CPLAY MID". = AD = " 4. Press the [REC/REC MODE] button when "C1 is displayed. 5. Press the u (MD) or x (MD) button to display "FBIAS ADJUST". 6. Press the [RADIO/BAND] button to display " / a = ". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [a =] indicate the focus bias value. 7. Turn the JOG dial clockwise and find the focus bias value at which the C1 error rate becomes about 200 (Refer to Note 2). / b = ". 8. Press the [RADIO/BAND] button to display " 9. Press the u (MD) or x (MD) button counterclockwise and find the focus bias value at which the C1 error rate becomes about 200. 10. Press the [RADIO/BAND] button to display " / c = ". 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the [RADIO/BAND] button. ( )" is above 20, press the 12. If the "( )" in " [RADIO/BAND] button. If below 20, press the [REC/REC MODE] button and repeat the adjustment from step 2. 13. Press the Z (MD) button and take out the disc.
Note 1: The relation between the C1 error and focus bias is as shown in the following figure. Find points A and B in the following figure using the above adjustment. The focal point position C is automatically calculated form points A and B. Note 2: As the C1 error rate changes, perform the adjustment using the average value. C1 error about 200
12. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount. Checking Procedure: 1. Load the continuously-recorded disc. (Refer to "5. CREATING CONTINUOUSLY-RECORDED DISC") 2. Press the u (MD) or x (MD) button to display "CPLAY MODE". 3. Press the [RADIO/BAND] button twice to display "CPLAY MID". 4. Press the [REC/REC MODE] button when "C1 = AD = " is displayed. 5. Press the u (MD) or x (MD) button to display "FBIAS CHECK". 6. Press the [RADIO/BAND] button to display " / c = ". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 50 and ADER is below 2. 7. Press the [RADIO/BAND] button and display " / b = ". Check that the C1 error is about 200 and ADER is below 2. / a = ". 8. Press the [RADIO/BAND] button and display " Check that the C1 error is about 200 and ADER is below 2. 9. Press the [REC/REC MODE] button, then press the Z (MD) button and take out the disc.
Note 1: If the C1 error and ADER are above other than the specified value at points A (step 8. in the above) or B (step 7. in the above), the focus bias adjustment may not have been carried out properly. Adjust perform the beginning again.
B
C
A
Focus bias value (F. BIAS)
31
Adjustment Location:
BD BOARD (COMPONENT SIDE)
CN101 D101
CN110
GND I+3V IOP TEO RF VC
NOTE
IC171
BD BOARD (CONDUCTOR SIDE)
IC101
IC121
IC192
Note: It is useful to use the jig for checking the waveform. (Refer to Servicing Notes on page 5)
32
5-3. CD SECTION
Set the CD test mode when performing confirmations. After completing the confirmation, release the CD test mode. In the CD test mode, the set works as following sequence. CD test mode sequence:
Display
88
XX
XX XXX
1. Enter the CD test mode (STOP mode 1) Press the x (CD) button. 2. STOP mode 2
2. STOP Mode 2
1. Press the x (CD) button to enter the STOP mode 2, and display as below. Display
88
Press the [u, CD] button. Press the x (CD) button. 3. FOCUS mode Press the [u, CD] button. 4. ALL SERVO ON mode 2 Press the [u, CD] button. 5. TRACKING GAIN UP mode 1 Press the [u, CD] button. 6. TRACKING GAIN UP mode 2 Press the [u, CD] button. 7. ALL SERVO ON mode1 Press the [u , CD] button. Press the x (CD) button. Press the x (CD) button. Press the x (CD) button. Press the x (CD) button.
07
00 3A0
2. Press the > and . button to move the optical pick-up to position of the track where signal is recorded.
3. FOCUS Mode (Traverse Confirmation)
1. Press the u button to enter the FOCUS mode and display as below. (Focus servo ON. CLV-S, tacking and sled servo OFF) Display
11
07
00 3A0
2. Connect an oscilloscope to TP (TEO) and TP (VC) on the CD board. Connection:
oscilloscope (DC range) CD board TP (TEO) TP (VC) +
3. Confirm that the traverse level of waveform satisfy specified value as follows.
Traverse Waveform
Note 1: ALL SERVO ON mode 1 and TRACKING GAIN UP mode 1: LPC ON (lights up "ALL" indication) ALL SERVO ON mode 2 and TRACKING GAIN UP mode 2: LPC OFF (Does not lights up "ALL" indication) *) LPC: Laser power control Note 2: TRACKING GAIN UP mode 1, 2 is not used in servicing.
A VC B A=B traverse level: 160 to 380 mVp-p
1. Entering the CD Test Mode
1. 2. 3. 4. 5. Press the [OPERATE] button to turn the power ON. Open the disc lid, and put a disc. Close the disc lid. Press the [OPERATE] button to standby state. Press the button [EDIT], [SOUND] and > (CD) simultaneously. 6. After display "CD" for a few seconds, enter the CD test mode (STOP mode 1), and display as below.
Specified Value: traverse level: 160 to 380 mVp-p Connecting Location: CD board (See page 34)
33
4. ALL SERVO ON Mode 1
(RF Level and Jitter Confirmation 1) 1. Press the u button four times to enter the ALL SERVO ON mode 1 (start playback the disc) and display as below. (All servo ON. LPC ON) Display
6. Releasing the CD Test Mode
1. Press the x (CD) button to stop rotate the disc. 2. Press the [OPERATE] button to release the CD test mode and turn to standby state.
Connecting Location:
CD BOARD (CONDUCTOR SIDE)
ALL
21
07
00 3A0
2. Connect an oscilloscope to TP (RFO) and TP (VC) on the CD board. Connection:
oscilloscope (DC range) CD board
TP(VC)
TP (RFO) TP (VC)
+
TP(RFO)
TP(TEO)
3. Confirm that the RF level and jitter of waveform satisfy specified values as follows.
RF signal Waveform
VOLT/DIV: 200 mV TIME/DIV: 500 ns
RF level: 1.0 to 1.4 Vp-p
Specified Values: RF level : 1.0 to 1.4 Vp-p jitter : less than 9 nsec Connecting Location: CD board
5. ALL SERVO ON Mode 2
(RF Level and Jitter Confirmation 2) 1. Press the u button to enter the LPC OFF mode and display as below. (All servo ON. LPC OFF) Display
21
07
00 3A0
2. Confirm that the RF level and jitter of waveform satisfy specified values as follows. Specified Values: RF level : 0.8 to 1.4 Vp-p jitter : less than 9 nsec If the RF level and jitter are out of specified values, measure again after clean the object lens by an applicator with lens cleaning liquid.
34
SECTION 6 DIAGRAMS
6-1. IC PIN FUNCTION DESCRIPTIONS
· BC BOARD IC101 CXA2523AR (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. 1 2 3 49 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name I J VC AF PD APC APCREF GND TEMPI TEMPR SWDT SCLK XLAT XSTBY F0CNT VREF EQADJ 3TADJ VCC WBLADJ TE CSLED SE ADFM ADIN ADAGC ADFG AUX FE ABCD BOTM PEAK RF RFAGC AGCI COMPO COMPP ADDC OPO OPN RFO MORFI MORFO I/O I I O I I O I -- I O I I I I I O I I -- I O I O O I I O O O O O O O I I O I I O I O I O Pin Description I-V converted RF signal I input from the optical pick-up block detector I-V converted RF signal J input from the optical pick-up block detector Middle point voltage (+ 1.65 V) generation output terminal Signal input from the optical pick-up detector Light amount monitor input from the optical pick-up block laser diode Laser amplifier output terminal to the automatic power control circuit Reference voltage input terminal for setting laser power Ground terminal Connected to the temperature sensor Output terminal for a temperature sensor reference voltage Writing serial data input from the CXD2654R (IC121) Serial data transfer clock signal input from the CXD2654R (IC121) Serial data latch pulse signal input from the CXD2654R (IC121) Standby signal input terminal from the CXD2654R (IC121) Reference voltage output terminal Not used (open) Center frequency setting terminal for the internal circuit (EQ) Center frequency setting terminal for the internal circuit (BPF3T) Power supply terminal (+3.3V) Center frequency setting terminal for the internal circuit (BPF22) Tracking error signal output to the CXD2654R (IC121) Connected to the external capacitor for low-pass filter of the sled error signal Sled error signal output to the CXD2654R (IC121) FM signal output of the ADIP Receives a ADIP FM signal in AC coupling Connected to the external capacitor for ADIP AGC ADIP duplex signal (22.05 kHz ± 1 kHz) output to the CXD2654R (IC121) Auxiliary signal (I3 signal/temperature signal) output to the CXD2654R (IC121) Focus error signal output to the CXD2654R (IC121) Light amount signal (ABCD) output to the CXD2654R (IC121) Light amount signal (RF/ABCD) bottom hold output to the CXD264R (IC121) Light amount signal (RF/ABCD) peak hold output to the CXD2654R (IC121) Playback EFM RF signal output to the CXD2654R (IC121) Connected to the external capacitor for RF auto gain control circuit Receives a RF signal in AC coupling User comparator output terminal User comparator input terminal Not used (open) Not used (fixed at "L") Not used (open) Not used (fixed at "L") "L": standby (fixed at "H" in this set) Center frequency control voltage input terminal of internal circuit (BPF22, BPF3T, EQ) input
Connected to the external capacitor for cutting the low band of the ADIP amplifier User operational amplifier output terminal RF signal output terminal Receives a MO RF signal in AC coupling MO RF signal output terminal User operational amplifier inversion input terminal
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· BD BOARD IC121 CXD2654R (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 34 35 36 40 41 42 43 44 45 Pin Name MNT0 (FOK) MNT1 (SHOCK) MNT2 (XBUSY) MNT3 (SLOCK) SWDT SCLK XLAT SRDT SENS XRST SQSY DQSY RECP XINT TX OSCI OSCO XTSL DIN0 DIN1 DOUT DATAI LRCKI XBCKI ADDT DADT LRCK XBCK FS256 DVDD A03 A00 A10 A04 A08 A11 DVSS XOE XCAS A09 I/O O O O O I I (S) I (S) O (3) O (3) I (S) O O I O I I O I I I O I I I I O O O O -- O O O O -- O O O Pin Description Focus OK signal output to the MD mechanism controller (IC601) "H" is output when focus is on ("L": NG) Track jump detection signal output to the MD mechanism controller (IC601) Busy monitor signal output to the MD mechanism controller (IC601) Spindle servo lock status monitor signal output to the MD mechanism controller (IC601) Writing serial data signal input from the MD mechanism controller (IC601) Serial data transfer clock signal input from the MD mechanism controller (IC601) Serial data latch pulse signal input from the MD mechanism controller (IC601) Reading serial data signal output to the MD mechanism controller (IC601) Internal status (SENSE) output to the MD mechanism controller (IC601) Reset signal input from the MD mechanism controller (IC601) "L" is output every 13.3 msec (IC601) Almost all, "H" is output Almost all, "H" is output "L": reset Subcode Q sync (SCOR) output to the MD mechanism controller (IC601) Digital In U-bit CD format subcode Q sync (SCOR) output to the MD mechanism controller "L" is output every 13.3 msec Laser power selection signal input from the MD mechanism controller (IC601) "L": playback mode, "H": recording mode Interrupt status output to the MD mechanism controller (IC601) Recording data output enable signal input from the MD mechanism controller (IC601) Writing data transmission timing input (Also serves as the magnetic head on/off output) System clock signal (512 Fs = 22.5792 MHz) input terminal System clock signal (512 Fs = 22.5792 MHz) output terminal Input terminal for the system clock frequency setting "L": 45.1584 MHz, "H": 22.5792 MHz (fixed at "H" in this set) Digital audio signal input terminal when recording mode (for digital optical input) Digital audio signal input terminal when recording mode (for digital optical input) Digital audio signal output terminal when playback mode (for digital optical output) Not used Serial data input terminal Not used (fixed at "L") Not used (fixed at "L") Not used (fixed at "L") L/R sampling clock signal (44.1 kHz) input terminal Bit clock signal (2.8224 MHz) input terminal Not used Not used (open)
Recording data input from the A/D, D/A converter (IC603) Playback data output to the A/D, D/A converter (IC603) L/R sampling clock signal (44.1 kHz) output to the A/D, D/A converter (IC603) Bit clock signal (2.8224 MHz) output to the A/D, D/A converter (IC603) Clock signal (11.2896 MHz) output terminal Address signal output to the D-RAM (IC124) Address signal output to the external D-RAM Address signal output to the D-RAM (IC124) Address signal output to the external D-RAM Ground terminal (digital system) Output enable signal output to the D-RAM (IC124) Address signal output to the D-RAM (IC124) "L" active "L" active Column address strobe signal output to the D-RAM (IC124) Not used (open) Not used (open) Not used (open) Power supply terminal (+3.3 V) (digital system)
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Pin No. 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
Pin Name XRAS XWE D1 D0 D2 D3 MVCI ASYO ASYI AVDD BIAS RFI AVSS PCO FILI FILO CLTV PEAK BOTM ABCD FE AUX1 VC ADIO AVDD ADRT ADRB AVSS SE TE DCHG APC ADFG F0CNT XLRF CKRF DTRF APCREF LDDR TRDR TFDR DVDD FFDR FRDR FS4
I/O O O I/O I/O I/O I/O I (S) O I (A) -- I (A) I (A) -- O (3) I (A) O (A) I (A) I (A) I (A) I (A) I (A) I (A) I (A) O (A) -- I (A) I (A) -- I (A) I (A) I (A) I (A) I (S) O O O O O O O O -- O O O
Pin Description Row address strobe signal output to the D-RAM (IC124) Write enable signal output to the D-RAM (IC124)
"L" active
"L" active
Two-way data bus with the D-RAM (IC124)
Digital in PLL oscillation input from the external VCO Playback EFM full-swing output terminal
Not used (fixed at "L")
Playback EFM asymmetry comparator voltage input terminal Power supply terminal (+3.3 V) (analog system) Playback EFM asymmetry circuit constant current input terminal Playback EFM RF signal input from the CXA2523AR (IC101) Ground terminal (analog system) Phase comparison output for master clock of the recording/playback EFM master PLL Filter input for master clock of the recording/playback master PLL Filter output for master clock of the recording/playback master PLL Internal VCO control voltage input of the recording/playback master PLL Light amount signal (RF/ABCD) peak hold input from the CXA2523AR (IC101) Light amount signal (RF/ABCD) bottom hold input from the CXA2523AR (IC101) Light amount signal (ABCD) input form the CXA2523AR (IC101) Focus error signal input from the CXA2523AR (IC101) Auxiliary signal (I3 signal/temperature signal) input from the CXA2523AR (IC101) Middle point voltage (+1.65 V) input from the CXA2523AR (IC101) Monitor output of the A/D converter input signal Power supply terminal (+3.3 V) (analog system) A/D converter operational range upper limit voltage input terminal (fixed at "H" in this set) A/D converter operational range lower limit voltage input terminal (fixed at "L" in this set) Ground terminal (analog system) Sled error signal input from the CXA2523AR (IC101) Tracking error signal input from the CXA2523AR (IC101) Connected to the +3.3 V power supply Error signal input for the laser automatic power control Not used (fixed at "H") ADIP duplex FM signal (22.05 kHz ± 1 kHz) input from the CXA2523AR (IC101) Filter f0 control signal output to the CXA2523AR (IC101) Serial data latch pulse signal output to the CXA2523AR (IC101) Serial data transfer clock signal output to the CXA2523AR (IC101) Writing serial data output to the CXA2523AR (IC101) Control signal output to the reference voltage generator circuit for the laser automatic power control PWM signal output for the laser automatic power control Not used (open) Tracking servo drive PWM signal () output to the BH6511FS (IC152) Tracking servo drive PWM signal (+) output to the BH6511FS (IC152) Power supply terminal (+3.3 V) (digital system) Focus servo drive PWM signal (+) output to the BH6511FS (IC152) Focus servo drive PWM signal () output to the BH6511FS (IC152) Clock signal (176.4 kHz) output terminal (X'tal system) Not used (open) Not used (open)
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Pin No. 91 92 93 94 95 96 97 98 99 100
Pin Name SRDR SFDR SPRD SPFD FGIN TEST1 TEST2 TEST3 DVSS EFMO
I/O O O O O I (S) I I I -- O
Pin Description Sled servo drive PWM signal () output to the BH6511FS (IC152) Sled servo drive PWM signal (+) output to the BH6511FS (IC152) Spindle servo drive PWM signal () output to the BH6511FS (IC152) Spindle servo drive PWM signal (+) output to the BH6511FS (IC152)
Input terminal for the test (fixed at "L")
Ground terminal (digital system) EFM signal output terminal when recording mode
* I (S) stands for schmitt input, I (A) for analog input, O (3) for 3-state output, and O (A) for analog output in the column I/O.
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· IC401 CXP740