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Service Manual
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PMC-MD55
SERVICE MANUAL
Ver 1.1 1999. 08
US Model Canadian Model AEP Model UK Model
U.S. and foreign patents licensed form 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
NEW KSM-213CGP KSS-213C MDS-JB920 MDM-5A MBU-5A KMS-260A
SPECIFICATIONS
(US only) AM (MW/LW): Loop antenna
Continued on next page
PERSONAL MINIDISC SYSTEM
MICROFILM
(US, Canadian) 87.5 - 108 MHz (AEP, UK) (US, Canadian) MW: 531 - 1,602 kHz (AEP, UK) LW: 153 - 279 kHz (AEP, UK)
TABLE OF CONTENTS 1. 2. SERVICING NOTES .............................................. GENERAL
Playing a CD .................................................................. Recording a Whole CD .................................................. Playing an MD ............................................................... Listening to the radio ..................................................... Setting the Clock ............................................................ Hooking up the System .................................................. 6 6 7 7 8 8 9 3
3. 4. 5.
DISASSEMBLY ........................................................
TEST MODE ............................................................. 15 ELECTRICAL ADJUSTMENTS
Tuner Section ................................................................. MD Section .................................................................... CD Section ..................................................................... Display Section .............................................................. 19 21 28 30
Maximum power output 7 W+7 W
6.
6-1. 6-2 6-3. 6-4. 6-5. 6-6. 6-7. 6-8. 6-9. 6-10. 6-11. 6-12. 6-13. 6-14. 6-15.
DIAGRAMS
Block Diagram TUNER Section ............................ 31 Block Diagram MD Section ................................... 34 Block Diagram CD Section .................................... 37 Block Diagram FUNCTION SELECT/PANEL Section ................... 40 Block Diagram POWER AMP/POWER SUPPLY Section .............. 43 Block Diagram SUPER WOOFER Section ........... 45 Printed Wiring Board TUNER Section .................. 49 Schematic Diagram TUNER Section ..................... 51 Schematic Diagram BD Section ............................. 53 Printed Wiring Boards BD Section ........................ 57 Printed Wiring Board DG Section .......................... 59 Schematic Diagram DG Section ............................. 61 Printed Wiring Boards MAIN Section ................... 64 Schematic Diagram MAIN (CD) Section .............. 67 Schematic Diagram MAIN (SYSTEM CONTROL) Section .................. 70 Schematic Diagram MAIN (FUNCTION SELECT) Section .................. 73 Printed Wiring Board AUDIO/JACK Section ........ 75 Schematic Diagram AUDIO/JACK Section .......... 77 Schematic Diagram CD MOTOR Section ............. 79 Printed Wiring Board CD MOTOR Section .......... 81 Printed Wiring Board CD OPEN/CLOSE Section ...................................... 82 Schematic Diagram CD OPEN/CLOSE Section ... 83 Printed Wiring Boards PANEL Section ................. 86 Schematic Diagram PANEL Section ...................... 89 Printed Wiring Boards POWER AMP/POWER Section .............................. 91 Schematic Diagram POWER AMP/POWER Section .............................. 93 Printed Wiring Boards SUPER WOOFER Section ...................................... 95 Schematic Diagram SUPER WOOFER Section ...................................... 97 IC Pin Function Description .......................................... 108
(US, Canadian) 230 V AC, 50 Hz (AEP, UK)
(MW/LW)
6-16. 6-17. 6-18. 6-19. 6-20. 6-21.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! 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.
6-22. 6-23. 6-24. 6-25. 6-26. 6-27. 6-28. 6-29.
ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
7. 8.
EXPLODED VIEWS ............................................... 118 ELECTRICAL PARTS LIST .............................. 128
2
SECTION 1 SERVICING NOTES
SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.
Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. The following caution label is located inside the unit.
0.15 µF
1.5 k
AC voltmeter (0.75 V)
Earth Ground
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. 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. 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. 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.
Fig. A. Using an AC voltmeter to check AC leakage.
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
3
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
for MDM-3 1 RF VC TEO IOP 5 I+3V for MDM-5 1 VC RF TEO IOP I+3V 6 GND
4
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 23) · 0.9 mW power Specified value : 0.84 to 0.92 mW · 7.0 mW power Specified value : 6.8 to 7.2 mW IOP (at 7mW) · Labeled on the optical pickup IOP value ± 10% Focus bias check (6-2 : See page 23) · Error rate check Specified value : a. For points A and B C1 error : About 200 ADER : Below 2 b. For point C C1 error : Below 50 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 23)
· Replace the optical pick-up
Self-recording/playback check (6-4 : See page 23)
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.
NOTE ON MOUNTING PULLY
pulley
DC motor (CD lid open/close)
2.5 mm
Press fit pulley to motor with jig.
5
SECTION 2 GENERAL
This section is extracted from instruction manual.
6
7
8
SECTION 3 DISASSEMBLY
· This set can be disassembled in the order shown below.
Set Rear cabinet Front cabinet block Upper cabinet block CD PICK-UP assy
Main board section
Main board
TU block, MD block
MD mechanism deck
Slider (CAM)
Base unit (MBU-5A), BD board
SW board, loading motor (M103)
Note: Follow the disassembly procedure in the numerical order given.
REAR CABINET
1 three screws (BTP2.6 × 8)
3 four screws (BTP3 × 10)
1 three screws (BTP2.6 × 8)
3 screw (BTP3 × 10)
2 two screws (BVTT3 × 8)
4 rear cabinet
3 four screws (BTP3 × 10)
9
FRONT CABINET BLOCK
1 three screws (BVTP3 × 12)
2 harness
1 three screws (BVTP3 × 12)
3 wire, parallel (ffc) 12P (CN407) 4 cabinet (front) block
UPPER CABINET BLOCK
4 cabinet (upper) block
2 connector (CN711)
1 wire, parallel (ffc) 16P (from OPTICAL PICK-UP connector)
1 wire, parallel (ffc) 11P (CN1001)
3 three claws
1 wire, parallel (ffc) 8P (CN409)
10
CD PICK-UP ASSY
1 two screws (PWH2.6 × 10)
2 PICK-UP assy
1 two screws (PWH2.6 × 10)
MAIN BOARD SECTION
2 wire parallel (ffc) 16P (CN701) 1 connector (CN704) 1 connector (CN302) 3 two screws (BVTP3 × 10) 1 connector (CN303) 1 connector (CN401)
3 two screws (BVTP3 × 10)
2 wire parallel (ffc) 11P (CN702)
4 main board section
1 connector (CN404) 1 connector (CN408) 1 connector (CN402) 2 wire parallel (ffc) 26P (CN405)
2 wire parallel (ffc) 9P (CN406) 1 connector (CN312) 2 wire parallel (ffc) 8P (CN409)
11
MAIN BOARD
shield plate (main)
1 two screws (BVTT2.6 × 6)
1 two screws (BVTT2.6 × 6) 2 main board
TU BLOCK, MD BLOCK
6 two screws (BVTP3 × 10) 7 TU block assy 8 two screws (BVTP3 × 10)
0 MD block assy
8 screw (BVTP3 × 10) 9 harness
5 shield plate (front) 3 screw (BVTP2.6 × 8) 4 two screws (BVTT2.6 × 5) 3 four screws (BVTP2.6 × 8)
1 two screws (BVTP2.6 × 8)
2 LCD block assy
12
MD MECHANISM DECK
1 four claws 2 shield plate (upper)
5 two screws (BVTTWH M3)
5 two screws (BVTTWH M3) 3 connector (CN601)
7 MD mechanism deck (MDM-5A) 4 wire, parallel (ffc) 21P (CN102) 4 wire, parallel (ffc) 23P (CN103)
6 harness
SLIDER (CAM)
6 slider (Cam)
· Note for Installation of Slider A (Cam)
Set the shaft of Cam gear to be at the position in the figure.
2 bracket (Guide L) 1 two screws (P2.6 × 6)
3 leaf spring
Set the shaft of Lever (O/C) to be at the position in the figure.
4 two screws (P2.6 × 6)
5 bracket (Guide R)
13
BASE UNIT (MBU-5A), BD BOARD
2 base unit (MBU-5A) 5 flexible board (CN104)
6 flexible board (CN101) 1 three screws (P2.6 × 6)
3 Remove the solder (Five portion). 7 BD board 4 screw (M1.7 × 4)
SW BOARD, LOADING MOTOR (M103)
2 gear B 3 two screws (PWH1.7 × 4)
1 screw (PTPWH M2.6 × 6)
4 loading motor (M103) 6 SW board
5 three screws (BTP2.6 × 6)
14
SECTION 4 TEST MODE
Refer to "5. ELECTRICAL ADJUSTMENT" for the test mode of CD section.
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 [MD EJECT Z ] 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 [MD EJECT Z ] button after pressing the [NO, CANCEL] 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. While pressing the both [BASS/TREBLE] and [EDIT] buttons, press the button [7 , MD] t [ ](MD) t [ 7 , MD] n [s](MD). s 3. Release the both [BASS/TREBLE] and [EDIT] buttons to enter the MD test mode.
3. RELEASING THE TEST MODE Press the [POWER] button to turn the power OFF, or press the [RESET] (bottom of the player unit) switch. 4. BASIC OPERATIONS OF THE TEST MODE All operations are performed using the JOG dial, [YES, ENTER] button, and [NO, CANCEL] button.
The functions of these buttons are as follows. Function name JOG dial YES, ENTER button NO, CANCEL button Function Changes parameters and modes Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations.
15
5. SELECTING THE TEST MODE
There are 9 types of test modes as shown below. The mode can be switched by turning the JOG dial. After selecting the mode to be used, press the [YES, ENTER] button. Display TEMP ADJUST LDPWR ADJUST LDPWR CHECK EFBAL ADJUST FBIAS ADJUST FBIAS CHECK CPLAY MODE CREC MODE EEP MODE 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 Contents Temperature compensation offset adjustment
· For details of each adjustment mode, refer to "5. Electrical Adjustments". · If a different mode has been selected by mistake, press the [NO, CANCEL] button to release that mode. · EEP MODE is not used for servicing and therefore is not described in detail. If this mode is sets accidentally, press the [NO, CANCEL] 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.
16
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) Turn the JOG dial and display "CPLAY MODE". (3) Press the [YES, ENTER] button to change the display to "CPLAY MID". (4) When access completes, the display changes to "C1 = AD = ".
Note: The numbers " " displayed show you error rates and ADER.
2. Changing the parts to be played back (1) Press the [YES, ENTER] button during continuous playback to change the display as below. "CPLAY MID" n "CPLAY OUT" n "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.
(2)
3. Ending the continuous playback mode (1) Press the [NO, CANCEL] button. The display will change to "CPLAY MODE". (2) Press the [MD EJECT Z ] 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
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) Turn the JOG dial and display "CREC MODE". (3) Press the [YES, ENTER] button to change the display to "CREC MID". (4) When access completes, the display changes to "CREC ( )" and "[REC]" lights up.
Note: The numbers " " displayed shows you the recording position addresses.
2. Changing the parts to be recorded (1) When the [YES, ENTER] button is pressed during continuous recording, the display changes as below. "CREC MID" n "CREC OUT" n "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.
(2)
3. Ending the continuous recording mode (1) Press the [NO, CANCEL] button. The display changes to "CREC MODE" and "[REC]" goes off. (2) Press the [MD EJECT Z ] 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 [NO, CANCEL] 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.
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 [NO, CANCEL] button immediately to release it.
17
6. FUNCTIONS OF OTHER BUTTONS
Function 7, MD and EDIT s (MD) and EDIT M m REC and EDIT SYNCHRO REC and EDIT AUTO PRESET and EDIT DISPLAY MD EJECT Z POWER or RESET 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 [DISPLAY] 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 [SYNCHRO REC] and [EDIT] buttons simultaneously 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.
Mode display Error rate display Address display Auto gain display (Not used in servicing) IVR display (Not used in servicing)
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]
MEANINGS OF OTHER DISPLAYS Display SHUF PGM Contents When Lit During continuous playback (CLV: ON) Tracking servo OFF Recording mode ON ABCD adjustment completed Foucs and tracking auto gain OK Pit High reflection CLV-S CLV LOCK Blink: Focus auto gain OK, Tracking auto gain NG Groove Low reflection CLV-A CLV UNLOCK When Off STOP (CLV: OFF) Tracking servo ON Recording mode OFF
[REC]
TOC EDIT DIGITAL TRACK MD disc mark DATE c
18
SECTION 5 ELECTRICAL ADJUSTMENTS
TUNER SECTION 0 dB=1 µV
T1 AM IF ADJUSTMENT Adjust for a maximum reading on level meter 450 kHz
[AM (MW/LW)] Setting: Function : RADIO BAND switch: AM (MW/LW)
AM RF signal generator
Put the lead-wire antenna close to the set.
AM VT VOLTAGE CONFIRMATION (US, Canadian) Frequency Display Confirmation 530 kHz 1,710 kHz Reading on Digital Voltmeter 0.7
+ 0.8 0.3
V
level meter 32 +
2 (headphone) jack
Confirmation
5±1V
set 30% amplitude modulation by 400 Hz signal Output level: as low as possible
AM TRACKING ADJUSTMENT (US, Canadian) Adjust for a maximum reading on level meter L4 CT2 620 kHz 1,400 kHz
[FM] (US, Canadian) * The adjustment is not necessary for FM because that AEP, UK models use FM tuner unit (TU1). Setting: Function : RADIO BAND switch : FM MONO/ST switch: stereo
FM RF signal generator 0.01 µF TU board TP (FM+) 32 set 75 kHz frequency TU board deviation by 1 kHz TP (FM) signal Output level: as low as possible +
2 (headphone) jack
MW VT VOLTAGE ADJUSTMENT (AEP, UK) Adjustment Part Frequency Display Reading on Digital Voltmeter L4 CT4 531 kHz 1,611 kHz 0.8 ± 0.1 V 5.5 ± 0.2 V
LW VT VOLTAGE ADJUSTMENT (AEP, UK) Adjustment Part Frequency Display Reading on Digital Voltmeter CT5 279 kHz 153 kHz 5.5 0.5 Confirmation
+ 0.3 0.4 + 0.4 0.3
V V
level meter
MW TRACKING ADJUSTMENT (AEP, UK) Adjust for a maximum reading on level meter L3 CT2 621 kHz 1,404 kHz
digital voltmeter TU board TP (CV) TP (FM) 100 k
LW TRACKING ADJUSTMENT (AEP, UK) Adjust for a maximum reading on level meter L5 CT3 162 kHz 261 kHz
· Repeat the procedures in each adjustment several times, and the VT voltage and tracking adjustments should be finally done by the trimmer capacitors.
FM VT VOLTAGE ADJUSTMENT (US, Canadian) Adjustment Part Frequency Display Reading on Digital Voltmeter L2 Confirmation 108 MHz 87.5 MHz 4.2 ± 0.2 V 1.9
+ 0.2 0.4
V
FM TRACKING ADJUSTMENT (US, Canadian) Adjust for a maximum reading on level meter L1 CT1 87.5 MHz 108 MHz
Adjustment Location: TU board (See page 20)
19
Adjustment Location: TU BOARD (Component Side)
FM tracking CT1 Adjustment L1 (US, Canadian) L2 FM VT Voltage Adjustment (US, Canadian) L3 CT2 MW Tracking Adjustment (AEP, UK)
L5 CT3 T1 AM IF Adjustment CT2 L4
LW Tracking Adjustment (AEP, UK)
CT5 LW VT Voltage Adjustment (AEP, UK) CT4 MW VT Voltage Adjustment (AEP, UK) L4
AM Tracking Adjustment (US, Canadian)
TU BOARD (Conductor Side)
TB1 TP (CV) TP (FM+) TP (FM)
IC1
20
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 · EF balance adjustment · Focus bias adjustment · Error rate adjustment · Focus bias check
21
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-260A)
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 devices. · 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 4) 7. As the disc used will affect the adjustment results, make sure that no 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. Recording of IOP information (Value on the optical pick-up label) 2. Temperature compensation offset adjustment 3. Laser power adjustment 4. EF balance adjustment 5. Focus bias adjustment 6. 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. Turn the JOG dial and display "CREC MODE". 3. Press the [YES, ENTER] button again to display "CREC MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the [NO, CANCEL] button and stop recording . 6. Press the [MD EJECT Z ] 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.
¬
¬
G
G
G
G
¬
¬
G
G
¬
¬
G
¬
¬
¬
¬
G
¬
G
¬ ¬
¬ ¬
G G
¬ ¬
G G
2. Set the test mode when performing adjustments. After completing the adjustments, release the test mode. 3. Perform the adjustments to be needed in the order shown.
22
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 5). 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 disk (MDW-74/AU-1). 2. Turn the JOG dial to display "CPLAY MODE". 3. Press the [YES, ENTER] button twice to display "CPLAY MID". 4. Press the [NO, CANCEL] button when "C1 = AD = " is displayed. 5. Turn the JOG dial to display "FBIAS CHECK". 6. Press the [YES, ENTER] 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 [YES, ENTER] button to display " / b = ". Check that the C1 error is about 200 and ADER is below 2. 8. Press the [YES, ENTER] button to display " / a = ". Check that the C1 error is about 200 and ADER is below 2. 9. Press the [NO, CANCEL] button, then press the [MD EJECT Z] button and take out the test 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 [m] button or [M] button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP) on the BD board. 2. Then, turn the JOG dial to display "LDPWR CHECK". 3. Press the [YES, ENTER] 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 [YES, ENTER] 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)
KMS260A 27X40 B0825
6-3. C PLAY Check MO Error Rate Check Checking Procedure : 1. Load the test disk (MDW-74/AU-1). 2. Turn the JOG dial to display "CPLAY MODE". 3. Press the [YES, ENTER] button to display "CPLAY MID". AD = ". 4. The display changes to "C1 = 5. If the C1 error rate is below 80, check that ADER is below 2. 6. Press the [NO, CANCEL] button to stop playback, then press the [MD EJECT Z] button and take out the test disc. CD Error Rate Check Checking Procedure : 1. Load the check disc (MD) TDYS-1. 2. Turn the JOG dial to display "CPLAY MODE". 3. Press the [YES, ENTER] 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 [NO, CANCEL] button to stop playback, then press the [MD EJECT Z] 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. Turn the JOG dial to display "CREC MODE". 3. Press the [YES, ENTER] 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 [NO, CANCEL] button to stop continuous recording. 6. Turn the JOG dial to display "CPLAY MODE". 7. Press the [YES, ENTER] 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 [NO, CANCEL] button to stop playback, then press the [MD EJECT Z] button and take out the disc.
lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the [NO, CANCEL] button to display "LDPWR CHECK" and stop the laser emission. (The [NO, CANCEL] button is effective at all times to stop the laser emission)
Note 1: After step 4, each time the [YES, ENTER] 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.
23
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, turn the JOG dial to display "LDPWR CHECK". 8. Press the [YES, ENTER] button once to display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the [YES, ENTER] 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)
KMS260A 27X40 B0825
Adjusting Procedure : 1. Turn the JOG dial to display "TEMP ADJUST". 2. Press the [YES, ENTER] button to select the "TEMP ADJUST" mode. 3. "TEMP = " and the current temperature data will be displayed. 4. To save the data, press the [YES, ENTER] button. When not saving the data, press the [NO, CANCEL] button. 5. When the [YES, ENTER] button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUST" display then. When the [NO, CANCEL] 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".
lOP=82.5 mA in this case lOP (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the [NO, CANCEL] button to display "LDPWR CHECK" and stop the laser emission. (The [NO, CANCEL] button is effective at all times to stop the laser emission)
Note 1: After step 9, each time the [YES, ENTER] 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.
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 [m] button or [M] button to move the optical pick-up) Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP) on the BD board. 2. Turn the JOG dial to display "LDPWR ADJUST". (Laser power : For adjustment) 3. Press the [YES, ENTER] button once to display "LD 0.9 mW $ ". 4. Turn the JOG dial so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the [YES, ENTER] 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. Turn the JOG dial so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the [YES, ENTER] button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds continuously.
24
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)
8. Turn the JOG dial so that the waveform of the oscilloscope becomes the specified value. of "EFB- " changes (When the JOG dial is turned, the 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
BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
330 k
+
10 pF
A VC B
Connection :
oscilloscope (DC range) BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)
+
Specification A = B
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 [ M] button to move the optical pick-up outside the pit. 4. Turn the JOG dial to display "EFBAL ADJUST". 5. Press the [YES, ENTER] button to display "EFB = MOR". (Laser power READ power/Focus servo ON/tracking servo OFF/spindle (S) servo ON) 6. Turn the JOG dial so that the waveform of the oscilloscope becomes the specified value. of "EFB= " changes (When the JOG dial is turned, the 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
9. Press the [YES, ENTER] button, and save the adjustment results in the non-volatile memory. ("EFB = SAVE" will be displayed for a moment) 10. "EFB = MO-P" will be displayed. The optical pick-up moves to the pit area automatically and servo is imposed. 11. Turn the JOG dial 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
A VC B Specification A = B
7. Press the [YES, ENTER] 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 [YES, ENTER] button, and save the adjustment results in the non-volatile memory. ("EFB = SAVE" will be displayed for a moment) Next "EFBAL ADJUST" is displayed. The disc stops rotating automatically. 13. Press the [MD EJECT Z ] button and take out the disc. 14. Load the check disc (MD) TDYS-1. CD". 15. Press the [YES, ENTER] button to display "EFB = 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
25
17. Press the [YES, ENTER] 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 [MD EJECT Z] 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. Turn the JOG dial and display "CPLAY MODE". 3. Press the [YES, ENTER] 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 [NO, CANCEL] button to stop playback, then press the [MD EJECT Z ] 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. Turn the JOG dial to display "CPLAY MODE". 3. Press the [YES, ENTER] button to display "CPLAY MID". 4. The display changes to "C1 = AD = ". 5. If the C1 error rate is below 50, check that ADER is 00. 6. Press the [NO, CANCEL] button to stop playback, then press the [MD EJECT Z ] 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. Turn the JOG dial to display "CPLAY MODE". 3. Press the [YES, ENTER] button to display "CPLAY MID". 4. Press the [NO, CANCEL] button when "C1 = AD = " is displayed. 5. Turn the JOG dial to display "FBIAS ADJUST". 6. Press the [YES, ENTER] 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). 8. Press the [YES, ENTER] button to display " / b = ". 9. Turn the JOG dial counterclockwise and find the focus bias value at which the C1 error rate becomes about 200. 10. Press the [YES, ENTER] button to display " / c = ". 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the [YES, ENTER] button. 12. If the "( )" in " ( )" is above 20, press the [YES, ENTER] button. If below 20, press the [NO, CANCEL] button and repeat the adjustment from step 2. 13. Press the [MD EJECT Z ] 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 from points A and B. Note 2: As the C1 error rate changes, perform the adjustment using the average vale.
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. Turn the JOG dial to display "CPLAY MODE". 3. Press the [YES, ENTER] button twice to display "CPLAY MID". AD = " 4. Press the [NO, CANCEL] button when "C1 = is displayed. 5. Turn the JOG dial to display "FBIAS CHECK". 6. Press the [YES, ENTER] 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 [YES, ENTER] button and display " / b = ". Check that the C1 error is about 200 and ADER is below 2. 8. Press the [YES, ENTER] button and display " / a = ". Check that the C1 error is about 200 and ADER is below 2 9. Press the [NO, CANCEL] button, then press the [MD EJECT Z] 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.
C1 error about 200
B
C
A
Focus bias value (F. BIAS)
26
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 4)
27
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:
1. Enter the CD test mode (STOP mode 1) Press the s (CD) button. 2. STOP mode 2 Press the [ , CD] 7 button. Press the s (CD) button. 3. FOCUS mode Press the [ , CD] 7 button. 4. ALL SERVO ON mode 2 Press the [ , CD] 7 button. 5. TRACKING GAIN UP mode 1 Press the [ , CD] 7 button. 6. TRACKING GAIN UP mode 2 Press the [ , CD] 7 button. 7. ALL SERVO ON mode1 Press the [ , CD] 7 button.
Note1: 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 Note2: TRACKING GAIN UP mode 1,2 is not used in servicing.
Display
88
XX
XX XXX
2. STOP Mode 2 1. Press the [s] (CD) button to enter the STOP mode 2, and
display as below. Display
88
07
00 3A0
2. Press the [ > ] and [ . ] button to move the optical pickup to position of the track where signal is recorded.
Press the s (CD) button.
3. FOCUS Mode (Traverse Confirmation) 1. Press the [ 7 ] button to enter the FOCUS mode and display
as below. (Focus servo ON. CLV-S, tacking and sled servo OFF) Display
Press the s (CD) button.
11
07
00 3A0
Press the s (CD) button.
2. Connect an oscilloscope to TP (TEO) and TP (VC) on the MAIN board. Connection:
oscilloscope (DC range)
Press the s (CD) button.
MAIN board TP (TEO) TP (VC) +
3. Confirm that the traverse level of waveform satisfy specified value as follows.
Traverse Waveform
A VC B A=B traverse level: 160 to 380 mVp-p
1. Entering the CD Test Mode 1. Press the [POWER] button to turn the power ON. 2. Press the [CD OPEN/CLOSE Z ] button to open the disc lid,
3. 4. 5. and put a disc. Press the [CD OPEN/CLOSE Z ] button to close the disc lid. Press the [POWER] button to standby state. While pressing the both [BASS/TREBLE] and [EDIT] buttons, press the button [7 , CD] t [s] (CD) t [7 , CD] t [ ] s (CD). Release the both [BASS/TREBLE] and [EDIT] buttons. 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: MAIN board (See page 29)
6. 7.
28
4. ALL SERVO ON Mode 1 (RF Level and Jitter Confirmation 1) 1. Press the [ 7 ] 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 [s ] (CD) button to stop rotate the disc. 2. Press the [POWER] button or [RESET] switch (bottom of the
player unit) to release the CD test mode and turn to standby state.
Connecting Location:
21
07
ALL
00 3A0
MAIN BOARD (Component Side)
2. Connect an oscilloscope to TP (RFO) and TP (VC) on the MAIN board. Connection:
oscilloscope (DC range) MAIN board TP (RFO) TP (VC) +
TP (TEO) TP (VC) TP (RFO)
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
IC701
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: MAIN board
5. ALL SERVO ON Mode 2 (RF Level and Jitter Confirmation 2) 1. Press the [ 7 ] 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 specifide values, measure again after clean the object lens by an applicator with lens cleaning liquid.
29
DISPLAY SECITON Dimmer Adjustment
Connection:
digital voltmeter LCD board TP (DIMMER) TP (GND)
+
1. Connect a digital voltmeter to TP (DIMMER) and TP (GND) on the LCD board. 2. Adjust RV550 so that the value of digital voltmeter becomes 2.83 V. Specified Value: 2.83 to 2.93 V
Note: Connect the liquid crystal display unit (LCD500) to the LCD board when performing adjustment.
Adjustment Location: LCD BOARD (Component Side)
RV550 Dimmer Adjustment
LCD BOARD (Conductor Side)
CN553
TP (DIMMER) TP (GND)
30
PMC-MD55 SECTION 6 DIAGRAMS
6-1. BLOCK DIAGRAM TUNER Section
TU BOARD
TB1 FM EXT ANTENNA (AEP, UK) (US, CND) (US, CND) FL1 75 B.P.F CT1, L1 FM TRACKING D7 2 FM RF-IN FM MIX MIX-OUT 4 CF1 FM IF AMP Q14 CF2 7 FM IF-IN (AEP, UK) TU1 FM TUNER UNIT 1 ANT 5 VT IF OUT 7 OSC OUT 8
QUAD
CF3 10.7MHz IF, DET, FM MPX IC1 (2/2) 10 L-OUT MUTE R-OUT CN1 (1/3) AM/FM DET-OUT 16 BUFFER MPX-IN DIVIDE DECODE VCO 12 11 R-CH 12 RA-LCH
FM/AM FRONT-END IC1 (1/2)
FM DET
A
15
TO FUNCTION SELECT SECTION (Page 40)
FM EXT ANTENNA
L1 FM RF
24 CT1
FM RF OUT AM IF T1 MUTING Q7 AM IF-IN HIGH FREQUENCY CUT Q1 AM DET IF BUFFER
ST-IND IF-OUT MO-ST BAND
L2 FM OSC D8 L2 FM VT VOLTAGE
21
FM OSC
FM OSC
CF4 6
MUTING Q5
(US, CND) AM ANTENNA (US, CND) CT2, L4 AM TRACKING MW/LW ANTENNA (AEP, UK)
CT3, L5 LW TRACKING D9
CT2, L3 LW TRACKING
L3 AM (MW) ANT (US, CND) 22
18
17
14
13
AM RF-IN
CT3 MW MUTING Q9
CT2 RF AMP Q15 L5 LW ANT (AEP, UK) LW MUTING Q8 L4 AM OSC 20 AM OSC
AM MIX PLL, LOW-PASS FILTER IC2 OSC-OUT 19 12 FM-IN 1/2 SWALLOW COUNTER 1/16, 1/17 4BIT RDS BUFFER Q11 MONO/ST SWITCH Q2 (1/2) BAND SWITCH Q2 (2/2)
R-CH
MAIN BOARD (1/6)
12BITS PROGRAMMABLE DIVIDER X403 4.332MHz
11 AM OSC 16 17
AM-IN
CN1 (2/3) 8 1
CN408 (1/2) 4 MUX
14 XO
RDATA
13 XI RDS DECODER IC406
PD LP-IN
MUTING CONTROL SWITCH Q12
PHASE DETECTOR CHARGE PUMP
CT5 MW MUTING Q10
CT4 CT5 LW VT VOLTAGE CT4, L4 MW VT VOLTAGE (AEP, UK) 18 LP-OUT X IN ST-IND 8 MO/ST 13 IF-IN 10 MUTING Q3 BAND 7 MUTING CONTROL Q6
CD
2
16
REFERENCE DIVIDER
DATA SHIFT REGISTER LATCH
+B (FM TUNER UNIT)
B+ SWITCH Q13
+B (+8V)
19 X1 75kHz
(AEP, UK)
RDS-DATA
1
2
3
4 COUNT CLK DATA CE VT
7 6 5 3 2 1
7 6 5 3 2 1
63 R-MUTE 64 R-COUNT 65 R-CLK 66 R-DATA 67 R-CE
SYSTEM CONTROLLER IC405(1/5)
RDS-CLK
RD
X OUT 20 9 FM-L 6 MW-L 5 LW-L
CCB/IF
CK CE
CN1 (3/3)
7 CN402
RCLK
9
VT
G
FROM POWER SUPPLY SECTION (Page 43)
05
· SIGNAL PATH : FM : AM R-CH : Same as L-CH.
· Abbreviation CND : Canadian
31
32
33
PMC-MD55
6-2.
BLOCK DIAGRAM MD Section
BD BOARD (1/2)
DIGITAL SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER IC121 (1/2) OVER WRITE HEAD DRIVE IC181, Q181, 182 FILTER 100 60 59 62 61 EFMO FILI PCO SHOCK PROOF MEMORY CONTROLLER CLTV FILO PLL EFM/ACIRC ENCODER/DECODER ATRAC ENCODER/DECODER SAMPLING RATE CONVERTER CN102 13 MD B+ (+3.3V) 25 22 24 23 11 10 DIN0 DIGITAL AUDIO INTERFACE DIN1 DOUT 19 20 21 3 5 7 19 17 15 MD PLAY/REC SWITCH Q620 +3.3V REG IC192 8 10 1 CN601 9 14 12 21
DG BOARD
B+ (+5V) 12 15 DOUT DIN BCK LRCK DEMO 18 SERIAL INTERFACE A/D CONVERTER PDDA PDAD 8 7 D/A, A/D CONVERTER IC603 D/A CONVERTER
LEVEL SHIFT IC604
CN603
2
D-IN
H
FROM CD SECTION (Page 39)
3
1
CN104 1 HR901 (OVER WRITE HEAD)
IC121 (1/2) ADDT DATAI XBCKI LRCKI
VOUTL 19 VOUTR 20
CN604 (1/2) R-CH
8
DA-LCH
I
TO FUNCTION SELECT SECTION (Page 40)
SCTX
VINL 6 VINR 3 SYSCK 9
3 R-CH
AD-LCH
J
FROM FUNCTION SELECT SECTION (Page 42)
48 MORFO OPTICAL PICK-UP BLOCK (KMS-260A) I J CN101 (1/2) 16 12 I J
47 MORFI
RF AMP, FOCUS/TRACKING ERROR AMP IC101
53
ASYO
12 13
1 2
54 RF AMP RFO 46 40 AGCI RF AGC & EQ EQ AUX PEAK TEMP PEAK & BOTTOM BOTM WBL AT AMP ADFM ADIN ADFG 33 37 36 RF 38 57
ASYI RFI COMPARATOR
B.P.F. F B C D B A 13 3T
WBL
DADT 26 XBCK 28 LRCK 27 FS256 29
OSCI CLOCK GENERATOR ADFG SUBCODE PROCESSOR INTERNAL BUS OSCO
16 17
DIVIDER IC123 D-RAM IC124
15
7
D FLIP 1 CLK FLOP Q 5 IC606
I
J
49, 48, 50, 51
B.P.F. ABCD AMP
29
30
32
78
1, 2, 18, 19
A E DETECTOR C D E F
14
A00 A09
4 5 6 7
A B C D
I-V AMP
ABCD FOCUS ERROR AMP FE
35 34 79 F0CNT SPINDLE SERVO SWDT SCLK XLAT MNT0 MNT1 MNT2 MNT3 SPRD DQSY SQSY SRDT SENS SPFD XINT CPU INTERFACE MONITOR CONTROL
DQ1 DQ4
ADIP DEMODULATOR/ DECODER
D0 D3
7
1
6 IC605 512FS OSC
2
34 31, 36 40, 45
8 9 AUTOMATIC POWER CONTROL Q162, 163
17
F
EQ 3T WBL
COMMAND 11 APC LD/PD AMP SERIAL/PARALLEL CONVERTER, DECODER
94 93
12 11
XT
I-V AMP
TRACKING ERROR AMP
26 28
A0 A9
E
TE SE
6 9, 11 15, 5
18 19 20
X603 22.5792MHz
15
14
9
8
5 6 7
1 2 3 4 FOK SHOCK XBUSY SLOCK
ILCC PD LD
9
LASER DIODE PD APCREF 6 LASER ON SWITCH Q101 10 PD
V-I CONVERTER
F0CNT
20
3
5
23 1
7 17
1 15 18 10 12 23 9 6 14 12
20 2 8 19 4 22 16 5
CN103 (1/5)
XOE 43 XWE 47 XRAS 46 XCAS 44
16 3 4 17
XOE XWE XRAS XCAS
SWDT SCLK XLAT
12
16 17 18
CN602 (1/4) CN602 (2/4) 15 26 7 10
21 19
16 15 DQSY SQSY CN103 (2/5) FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED MOTOR DRIVE IC152
89 SCTX
12 XINT
32 69 68 67 90 SRDT SENS SWDT SCLK XLATCH
77 33 41 42 FOK SHOCK MNT2 (XBUSY) MNT3 (SLOCK) EMP 70 DA-RST 83 CN605 (2/2) 3 5 7 CN601 (2/2)
9 4 17
75 LDON 81 DIG-RST 80 WR-PWR 86 MOD
16 PSB SPFD SPRD 83 APCREF 10 XRST 13 RECP AUTOMATIC POWER CONTROL 67 65 66 75 74 63 64 AUX1 ABCD FE TE SE PEAK BOTM
LDOUT
MD MECHANISM CONTROLLER IC601
RECP 37 PACK-OUT 8
3 5 7
SW BOARD (2/2)
S601 (REC POSITION) S602 (PACK OUT)
14 IN4R IN4F 3 4
LDIN
M101 (SPINDLE)
M
6 8
OUT4F OUT4R
95 94 PBP 38 4 FIN 5 RIN B+ (D +5V) REFERENCE VOLTAGE SWITCH Q611 39 LD-LOW 28 XIN X601 12MHz 1 1 2 2 27 XOUT 25 XIN-T CN601 (1/2) X602 32.768kHz 24 XOUT-T STB 36 SYS-RST 20 REFLECT 98 PROTECT 97 LIMIT-IN 96
· SIGNAL PATH : MD PLAY : MD REC (ANALOG)
S604 (PLAY POSITION)
OUT2
M
25 OUT2R
IN2R 30
91
SRDR
ANALOG MUX
OUT1
M102 (SLED)
27 OUT2F
IN2F 29
92
SFDR
LOADING MOTOR DRIVE IC602
VREF
6
CN602 (4/4) 8
CN103 (4/4) 16 S102 -1 -2
BD BOARD (2/2)
B+ S101 (LIMIT IN) S102-1 (REFLECT RATE DETECT) S102-2 (PROTECT DETECT) Q616
: MD REC (DIGITAL)
B+ SWITCH Q617 B+ (AU +3.3V)
R-CH : Same as L-CH.
PWM GENERATOR
A/D CONVERTER DIGITAL SERVO SIGNAL PROCESS CN605 (1/2) FROM CPU INTERFACE XLRF 80 CKRF 81 DTRF 82 XLAT SCLK SWDT HF MODULE SWITCH IC103, Q102 104
7
1
13 11
11 13
2-AXIS DEVICE FCS+ (TRACKING) (FOCUS)
CN101 (2/2) 4 21 OUT1F 23 OUT1R IN1F 19 IN1R 18 FFDR 88 FRDR 89
B+ (+5V)
B+ SWITCH Q612
B+ (D +5V)
MAIN BOARD (2/6)
CN405 (1/3) 12 SYSTEM CONTROLLER IC405(2/5) 18 REC-H 17 MD-H 19 MD-RST 22 MD-PDOWN 70 MD-STXD 69 MD-SRXD 20 MD-SCTS 21 MD-SRTS
FCS TRK+ TRK
3 2 1
AUTO SEQUENCER 12 OUT3F 10 OUT3R IN3F 14 IN3R 15 TFDR 86 TRDR 85 DIGITAL SERVO SIGNAL PROCESSOR IC121 (2/2)
Q610
M
M103 (LOADING)
HF MODULE
MOD
8 CN103 (3/5) SDA 5 EEPROM IC171 SCL 6 21 22
SW BOARD (1/2)
3 2 CN602 (3/4) 52 SDA 53 SCL PDOWN 13 RXD (UART) 57 TXD (UART) 58 RTS 59 CTS 60
RESET SWITCH Q604
B+ (+3.3V)
B+ SWITCH Q603
B+ (BU +3.3V)
13 CN604 (2/2) 21 26 22 23 24 25 21 26 22 23 24 25
05
34
35
36
PMC-MD55
6-3.
BLOCK DIAGRAM CD Section MAIN BOARD (3/6)
OPTICAL PICK-UP BLOCK (KSS-213C) 1 + + 5 DOUT CN701 VC 46 VC PD1 36 PD2 RF AMP, FOCUS/TRACKING SERVO IC701 53 DIGITAL SIGNAL PROCESSOR, CLV SERVO, D/A CONVERTER IC702 BCK 43 PCMD 41 LRCK 39 EMPH 54 BCKI 44 PCMDI 42 LRCKI 40 55 EMPHI PWM SERIAL I/F PWM AOUT2 76 R-CH AOUT1 65 CD L-CH CN704 2
D-OUT
H
TO MD SECTION (Page 36)
RF AMP RFO 31 25 35 18 RF FOK EFM DEMO. D/A I/F
K
TO FUNCTION SELECT SECTION (Page 41) TO FUNCTION SELECT SECTION (Page 41)
6
37
FOK
7 SUB CODE PROCESSOR SYSM 62 82 CD-MUTE 78 CD-SCOR 77 CD-SENSE1 79 CD-SQSO 81 75 74 76 CD-SQCK CD-XLAT CD-CLK CD-DATA SCOR 57 SENS 6 SQSO 5 SQCK 4 XLAT 8 CLOK 9 DATA 7 XTAI 70 X701 33.8688MHz SPOA XTAO 71 SYSTEM CONTROLLER IC405(3/5) 83 CD-FOK 91 CD-XRST 84 CD-SENSE2 TIN 19 HIGH SPEED SWITCH Q705 68 HI-SPEED
L
+ +
LD
TA O
XLON
12 TRACKING/FOCUS COIL DRIVE, SLED MOTOR DRIVE IC703 T+ (TRACKING) T15 18 T 14 17 T+ LEVEL SHIFT
5
15 32
17
MDP
PD
35
SL O
FE O
PD
RF-H
LEVEL SHIFT
(FOCUS) F16 27 F
LEVEL SHIFT
M1001 (SLED)
M
SL 2 CN1001 (1/2) 2 12 SL
M1002 (SPINDLE)
M
16 OUT4
MUTE4 26
1
1 B+ (+3.3V) +3.3V REGULATOR Q703 CD POWER REGULATOR CONTROL Q702 B+ (CD +6V)
34 CD-12HISP
CD-POWER CD-SHORT P-CON
EXTAL
MUTING Q1001 S1001 (LIMIT) B+
8
8
32 80 100
43
42 LEVEL SHIFT Q406
7 B+ SWITCH Q1006 Q1007 3 9
7 3 9 B+ (UNREG +8V)
D704
X401 8MHz P-CON
XTAL
CD MOTOR BOARD
05
+ + F+ SL+ 4
4 ILL DATA REGISTER 39 E FE AMP INPUT SHIFT, REGISTER F ADRESS DECODER OUTPUT DECODER
IIL TTL
3
C.OUT 22 SENS1 23 SENS2 24
CNIN 11 SEIN 10
8 AUTOMATIC POWER CONTROL Q701
CLV SERVO TTL IIL DATA 20 XLT 19 CLK 18 XRST 21 DATO 12 XLTO 13 CLKO 14 79 XRST CPU I/F
38
10
34
LD
APC 12
TRACKING PHASE COMPENSATION
FOCUS PHASE COMPENSATION
DIGITAL CLV
21
15
CD O/C BOARD
CD LID CLOSE DETECT Q762 M703 CD LID OPEN/CLOSE 1 CD LID OPEN/CLOSE MOTOR DRIVE IC711 M DRIVE 7 M+ VREF SLIN 6 10 MOTOR CONTROL Q763 B+ (MOTOR) MOTOR B+ SWITCH Q764 CL 4 OP 5
CN711 7 7
CN404 10 CD-TURN
13
26
F+ FIN 25
5
5
12 CD-OPEN
M
4
4
CN702(1/2) 4 11 SL+
13 CD-CLOSE
B+(BU3.3V)
MUTE DRIVE
MUTE
SELECT 51 MOTOR CONTROL Q766 1 3 1 3 93 SPEED-L B+ (CD6V) SELECT-GND 44
7
Q765 SPINDLE MOTOR DRIVE IC1001 15 OUT4+ DRIVE IN4 27 MOTOR CONTROL Q1002-1005 1
BUFFER IC1002 2
CN1001 (2/2) 5 5
CN702 (2/2)
S762 CD LID CLOSE DETECT S761 CD LID OPEN DETECT
6
6
48 CD-DOOR
TX 87 X402 32.768kHz TEX 86 TU-SFT 39
M
TO POWER SUPPLY SECTION (Page 44)
R-CH : Same as L-CH.
· SIGNAL PATH : CD PLAY : MD REC (DIGITAL)
37
38
39
PMC-MD55
6-4. BLOCK DIAGRAM FUNCTION SELECT/PANEL Section MAIN BOARD (4/6)
CN408 (2/2) FROM TUNER SECTION (Page 33) RADIO IN CN302 (1/3) OUT 5 TUNER/LINE IN MUTE Q106 1 1 TUNER/LINE IN SELECT IC301 CN405 (1/2) 3 AD-LCH
J
TO MD SECTION (Page 36)
A
RA-LCH
5
3
AU/JACK BOARD (1/4)
CN307 (1/2) 9 IN2 VOL 0dB/6dB BASS L-CH DIGITAL CONTROL SI R-CH SCK DBC R-CH ELECTRICAL VOLUME IC351 TREBLE DINAMIC BASS FILTER OUT2 16
LINE IN BOARD
SW1 J303 LINE IN CN305 R-CH 3 CN301 2 LINE IN MUTE Q104 LINE IN LEVEL CONTROL Q105 LINE IN MUTE DRIVE Q305 CN405(2/2) FROM MD SECTION (Page 36) LINE IN LEVEL CONTROL DRIVE Q306 7 LINE IN
N
TO POWER AMP SECTION (Page 43)
L-CH
2
19 18 20
R-CH
TUNER/LINE IN MUTE DRIVE Q308 LOW-PASS FILTER IC302 BUFFER Q103 (1/2) MD MUTE Q102 5 7 TUNER/LINE IN MUTE SWITCH Q307
I
DA L-CH
8
FROM CD SECTION (Page 38)
K
CD L-CH R-CH CD MUTE Q101 R-CH MD MUTE DRIVE Q304 CD MUTE DRIVE Q303
BUFFER Q103 (2/2)
2 RADIO/LINE AU-CLK 95 AU-DATA 94 6 5 6 5 S550 (MD) S554 (CD) R-CH S551 , MD S552 BAND, RADIO S553 , CD
FROM CD SECTION (Page 38)
L
R-CH
S555 CD OPEN/CLOSE
S579 LINE/LINE LEVEL
SW (TOP) BOARD
D552 BAND RADIO D550 MD
PL550 CD DISC ILLUMINATION
MD MUTE SWITCH Q302
CD MUTE SWITCH Q301 99 CD 1 MD 58 LINE-LEVEL 57 LINE LED-RADIO 28 LED-CD 29 LED-MD 27 KEY4 59 62 KEY1 CN409 (1/2) 7 8 6 1 7 8 6 1 CN550 (1/2)
CN550 (2/2) 5 LED DRIVE Q552 LED DRIVE Q551 LED DRIVE Q550 5 CN409 (2/2)
· SIGNAL PATH : TUNER : CD : MD PLAY
PILOT LAMP DRIVE Q405 S550-555, S579 Q404
: MD REC (ANALOG) R-CH : Same as L-CH.
SW (FRONT) BOARD
S572 POWER S576 TO TOP S557 DELETE S562 DISPLAY S565 VOL+ S569 MD EJECT S573 SLEEP S577 TO END S558 TUNE, S563 TUNE+, S566 VOL S574 STANDBY S578 REC S575 SYNCHRO REC S580 HIGH SPEED S560 EDIT S561 YES, ENTER S557-564 S568 MEGA BASS S571 AUTO PRESET, SHUF/PGM D554 SELECT D553 AMS/PRESET S565-571 S572-580
CN551 2 2
CN407
S559 NO, CANCEL S564 INSERT S567 BASS/TREBLE
11
11
61 KEY2
SYSTEM CONTROLLER IC405 (4/5)
D/LCON 23 PILOT LAMP DRIVE Q410 Q411 LCD-RST 24 BL-CONT 96 B/L CONTROL Q407 9 7 CN553 9 (2/2)
AU/JACK BOARD (2/4)
CN401 2 1 CN306 DIMMER Q357,358 UNREG +8V
O
10
10
S570 MONO/ST, REPEAT D555 HIGH SPEED
60 KEY3
CN302 (2/3) 7 CN406 (1/3) 7
CN307 (2/2)
FROM POWER SUPPLY SECTION (Page 44)
REMOTE CONTROL RECEIVER IC550
4 S556 (JOG DIAL)
4
85 RMC
7 9 12 5 1
7 9 12 5 1
LED DRIVE Q555
LED DRIVE Q554
LED DRIVE Q553
49 JOG-A 50 JOG-B LCD-DATA LCD-CLK LCD-CE LCD-AO 55 LED-PRESET/AMS 56 LED-SELECT 33 HI-LED
LAMP BOARD LCD BOARD
CN552 (2/3) 1 7 6 4 5 CN406(2/3) 1 7 6 4 5 CN553 (1/2) 21 1 3 5 4 RST AO CE CLK DATA PL553-555 (LCD BACK LIGHT) VDD V5 VR
46 47 05
25 26
6 8 14 RV550 DIMMER CN552 (3/3) 3 BU +3.3V FROM POWER SUPPLY SECTION (Page 44)
LIQUID CRYSTAL DISPLY LCD500
P
40
41
42
6-5.
BLOCK DIAGRAM POWER AMP/POWER SUPPLY Section
LINE AMP IC352 L 3 1 R-CH SPEAKER MUTE Q152 6 R-CH R-CH MEGABASS CONTROL Q362, 363 R-CH HEADPHONE AMP IC353 3 R HEADPHONE MUTE Q154 CN304 (1/2) 1 1 CN303 (1/2) J391 R SIGNAL INPUT (TO PLAYER UNIT) R-CH J301 SIGNAL OUTPUT (TO SPEAKER(L) UNIT) L
PMC-MD55
POWER AMP (A) BOARD
CN394 4 R-CH CN393 4 4 IN2 POWER AMP
AU/JACK BOARD (3/4)
FROM FUNCTION SELECT SECTION (Page 42)
POWER AMP (C) BOARD
CN392 +OUT2 9 1 SP391 L-CH
N
OUT2
11
2
MEGABASS SWITCH Q151
SIGNAL MUTE STANDBY
J301
+OUT1 14 OUT1 12 J392 SPEAKER OUTPUT R-CH IMPEDANCE USE4
1 2
SPEAKER(R) UNIT SP392 (R-CH)
2
JACK OUT JACK IN
6 5
D353
MAIN BOARD (5/6)
CN391 1 AUMUTE STANDBY SWITCH Q391, 392 2 4 PA-STBY UNREG 12V
POWER AMP (D) BOARD
MEGABASS IC354, Q352, 361 D358 D359
Q
TO SUPPER WOOFER SECTION (Page 45)
J302 SIGNAL OUTPUT (WOOFER) (TO SUPER WOOFER UNIT) MUTE DRIVE Q351 D364
POWER AMP (B) BOARD POWER BOARD
4 PA-STBY AUMUTE 2 1 CN901 UNREG 12V D901 RECT T901 POWER TRNSFORMER
MEGABASS ON/OFF Q360
B+ (AU +8V) 2 B+ (HEADPHONE AMP) B+ SWITCH Q359 B+ SWITCH Q355 +8V REGULATOR Q354 3 AUMUTE UNREG 10V UNREG 10V 2 3
CN902 D905-908 RECT
UNREG 10V
CN903 Q356 POWER STANDBY Q353 CN310 (1/2) CN304 (2/2) 6 4 7 CN307(2/2) 10 8 9 4 PA-STBY CN310 POWER INPUT (TO SPEKER(L) UNIT) PA-STBY 4 D902 RECT D903 D904 D903,904 RECT 1 2
AC IN
CN902 POWER OUTPUT (TO PLAYER UNIT)
6 CN303 (2/2) TO TUNER SECTION (Page 33) VT
4
7
10
8
9
AU/JACK BOARD (4/4)
CN401 B+ (CD +6V) +6V REGULATOR Q402 UNREG 8V 3 ACCHK 1 3 1 CN308 CN310 (2/2) 8 9 5 8 9 5 ACCHK UNREG 8V
MAIN BOARD (6/6)
CN302 (3/3)
G
+3.3V B+ REGULATOR (AU +3.3V) IC403
11 M/B
PA-STANDBY 97 A MUTE 98
REGULATOR SWITCHING Q403,408,409
UNREG 8V
O
TO PANEL SECTION (Page 42)
B+ (+3.3V)
BU +3.3V 3 REGULATOR 2 IC402 B+ SWITCH Q401
D401
+5V 3 REGULATOR 1 IC401
· SIGNAL PATH : FM R-CH : Same as L-CH.
SYSTEM CONTROLLER IC405 (5/5) B+ (+8V) B+ SWITCH Q413 B+ (AU +8V) HP-SW 45 S401 RESET RST 40 B+ (RDS) B+ SWITCH Q413 B+ (MD +5V) ACCHK 3
B+ (COM+5V)
B+ (MD +5V) P-CON HP-SW
M
FROM CD SECTION (Page 38) CN406 (3/3) BU +3.3V 3 BU +3.3V
31 RADIO POWER
RESET SIGNAL 1 2 GENERATOR IC404
P
TO PANEL SECTION (Page 42)
(AEP, UK)
AC CHECK Q412
05
43
44
PMC-MD55
6-6.
BLOCK DIAGRAM SUPER WOOFER Section
J811 SIGNAL INPUT (WOOFER) (TO PLAYER UNIT) FROM POWER AMP SECTION
WOOFER AMP (B) BOARD
FILTER AMP IC811 5 7 3 1 CN803 (1/2) 3 3
W-VOLUME BOARD
CN821 (1/2) CN821 (2/2) 4 4
WOOFER AMP (A) BOARD
CN803 (2/2) 3 IN+ BIPOLAR TRANSCONDACTANCE INPUT STAGE
WOOFER AMP IC812 MOS GAIN & LEVEL SHIFTING STAGE MOS OUTPUT STAGE SHORT CIRCUIT PROTECTION CN812 OUT 14 2 SP800 (SUPER WOOFER)
Q
(Page 45) D811
WOOFER MUTE Q811, 812
PROTECT CONTROL Q813
RV821 LEVEL STBY
STANDBY/ MUTE 9 10 MUTE
W-LED BOARD
CN825 D821 LEVEL 1 1 CN822 1 1 LED DRIVE Q818 STANDBY SWITCH Q816 D815 MUTEING CONTROL Q817
POWER CONTROL Q815 D801-804 RECT CN811 1 CN802 1 T801 POWER TRANSFORMER CN801 AC IN
B+ (+18V) B+ (+10V) +10V REGULATOR Q814
B (18V)
3
3
J801 AC OUTLET MAX 35W
W-POWER BOARD
05
· SIGNAL PATH : FM
45
46
· Circuit Bords Location Player Unit
SW board SW (TOP) board CD MOTOR board CD O/C board
LAMP board AU/JACK board
TU board SW (FRONT) board
LCD board
MAIN board BD board
DG board LINE IN board
Speaker (L) Section
POWER board
POWER AMP (C) board
POWER AMP (A) board
POWER AMP (B) board
POWER AMP (D) board
47
Super Woofer Section
W-POWER board
WOOFER AMP (A) board
W-LED board
WOOFER AMP (B) board
W-VOLUME board
48
6-8.
SCHEMATIC DIAGRAM TUNER Section · See page 99 for Waveforms. · See page 101 for IC Block Diagrams.
PMC-MD55
(Page 70)
(Page 70)
51
52
PMC-MD55
6-9. SCHEMATIC DIAGRAM BD Section · See page 99 for Waveforms. · See page 102 for IC Block Diagrams.
(Page 54)
(Page 61)
(Page 61)
(Page 61)
Note on Schematic Diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1/4 W or less unless otherwise specified. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Note: Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une pièce por tant le numéro spécifié.
· A : B+ Line. · Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : MD STOP ( ) : MD PLAY < > : MD REC : Impossible to measure · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances.
· Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. E : MD PLAY j : MD REC (ANALOG) q : MD REC (DIGITAL)
(Page 56)
53
54
55
56
PMC-MD55
6-12. SCHEMATIC DIAGRAM DG Section · See page 99 for Waveforms. · See page 104 for IC Block Diagrams.
(Page 55)
(Page 55)
(Page 70)
(Page 55)
(Page 67)
Note on Schematic Diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1/4 W or less unless otherwise specified. ¢ · : internal component.
· A : B+ Line. · Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : MD PLAY ( ) : MD STOP
· Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances.
61
62
63
· Circled numbers refer to waveforms. · Signal path. E : MD PLAY j : MD REC (ANALOG) q : MD REC (DIGITAL) · Abbreviation CND : Canadian model
PMC-MD55
6-14. SCHEMATIC DIAGRAM MAIN (CD) Section · See page 100 for Waveforms. · See page 105 for IC Block Diagrams.
(Page 70)
(Page 73)
(Page 79)
Note on Schematic Diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1/4 W or less unless otherwise specified. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Note: Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une pièce por tant le numéro spécifié.
(Page 70)
· A : B+ Line. · Voltages and waveforms are dc