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HCD-W550
SERVICE MANUAL
Canadian Model AEP Model UK Model E Model Australian Model Tourist Model
· HCD-W550 is the deck, CD section in MHC-W550/W770AV.
Manufactured under license from Dolby Laboratories Licensing Corporation. "DOLBY" and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
CD Section Tape deck Section
Model Name Using Similar Mechanism CD Mechanism Type Base Unit Name Model Name Using Similar Mechanism Tape Transport Mechanism Type
HCD-GR8/RX90 CDM38-5BD29A BU-5BD29A HCD-GR5/RX50 TCM-220WR2E
SPECIFICATIONS
CD player section system Compact disc and digital audio system Laser Semiconductor laser (l = 780 mm) Emission duration : continuous Laser output Max. 44.6 mW* *This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Frequency response 2Hz - 20 kHz (± 0.5dB) Wavelenght 780 - 790 mm Signal to noise ratio More than 90 dB Dynamic renge More than 90 dB CD OPTICAL DIGITAL OUT (Square optical connector jack, rear panel) Wavelength 600 mm Output Level - 18 dBm Tape player section Recording system 4 track 2 channel stereo Frequency response 60 - 13,000 Hz (± 3dB), (DOLBY NR OFF) using Sony TYPE I cassette 60 - 14,000 Hz (± 3 dB), using Sony TYPE II cassette General Dimensions (w / h / d)Approx. 280 ¥ 205 ¥ 359 mm Mass Approx. 4.3 kg Design and specifications are subject to change without notice.
STEREO CASSETTE DECK CD PLAYER
MICROFILM
TABLE OF CONTENTS 1. 2. GENERAL ······································································ 3 DISASSEMBLY 5.
5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7.
EXPLODED VIEWS
Main Section ····································································· 42 Front Panel Section ·························································· 43 CD Mechanism Deck Section-1 (CDM38-5BD29A) ····· 44 CD Mechanism Deck Section-2 (CDM38-5BD29A) ····· 45 Base Unit Section (BU-5BD29A) ···································· 46 Tape Mechanism Deck Section-1 (TCM-220WR2E) ······ 47 Tape Mechanism Deck Section-2 (TCM-220WR2E) ······ 48
2-1. Back Panel, CD Block Removal ········································· 4 2-2. Cassette Lid (A)/(B) Assy, Mechanism Deck Removal ···· 4 2-3. Main Board, Resistor Board, Front Panel Assy Removal ·· 5
3.
ADJUSTMENTS
3-1. Mechanical Adjustment ······················································ 6 3-2. Electrical Adjustment ························································· 6
6.
ELECTRICAL PARTS LIST ··································· 49
4.
4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 4-9. 4-10. 4-11. 4-12. 4-13. 4-14.
DIAGRAMS
Block Diagram ································································· 11 Circuit Boards Location ··················································· 13 Schematic Diagram -- Audio Section -- ························· 14 Printed Wiring Board -- Audio Section -- ······················ 17 Printed Wiring Board -- BD Section -- ·························· 19 Schematic Diagram -- BD Section -- ····························· 21 Printed Wiring Board -- Motor Section -- ······················ 23 Schematic Diagram -- Motor Section -- ························ 25 Schematic Diagram -- Panel Section -- ························· 27 Printed Wiring Board -- Panel Section -- ······················· 29 Printed Wiring Board -- Main Section -- ······················· 32 Schematic Diagram -- Main Section -- ·························· 35 IC Block Diagrams ··························································· 38 IC Pin Function ································································ 40
SERVICING NOTE
· Supplying power during servicing This equipment cannot operate without using a separate power supply. Connect to the STR-W550/W770AV when performing service work. To apply power set the SYSTEM POWER switch on the Tuner/Amp to ON. When other units are not available use the PFJ-1 power supply jig. When using the PFJ-1, simultaneously press the CD STOP button and the DECK A ) (fast rightward) button to turn on the power. [Connection Diagram]
PFJ-1 (Power Supply Jig) POWER SW
Connector Cable 17P (Supplied with set) Set
FH-E939,838,737, MHC-6600,5600, CDP/TC
Conversion Board (J-2501-138-A)
CNB108 17P SYSTEM CONTROL
--2--
SECTION 1 GENERAL
1 23
4
5
6
7
8 9
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@¡ @TM @º
!ª !·
!¶ !§
!
!£ !¢
1 2 3 4 5 6 7 8 9 !º !¡ !TM !£
DISC SKIP EX-CHANGE Button (CD) 0 Button (CD) ) Button (CD) DISC 1 Button (CD) DISC 2 Button (CD) DISC 3 Button (CD) 6 OPEN/CLOSE Button (CD) ·P Button (CD) p Button (CD) · Button [B] (DECK) ª Button [B] (DECK) Button [B] (DECK) ) Button [B] (DECK)
!¢ ! !§ !¶ !· !ª @º @¡ @TM @£ @¢ @
0 Button [B] (DECK) DIRECTION MODE Button (DECK) PAUSE Button (DECK) REC Button (DECK) HI-SPEED DUBBING Button (DECK) CD SYNCHRO Button (DECK) DOLBY NR Button (DECK) ) Button [A] (DECK) 0 Button [A] (DECK) Button [A] (DECK) ª Button [A] (DECK) · Button [A] (DECK)
--3--
SECTION 2 DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1.
BACK PANEL, CD BLOCK REMOVAL
CASE Unscrew the five case attachment in the screws (case) (M3 × 8) × 4, (+BV 3 × 8) × 1 and remove the case.
2 Back panel 1 Screw +BVTP 3 × 10
8 CD block
7 Screw +BVTP 3 × 10
1 Screw +BVTP 3 × 10 3 Flat wire (19 core) 4 CN112 (9 pin)
5 CN111 (8 pin) 6 Screw +BVTP 3 × 10
2-2.
1
CASSETTE LID (A)/(B) ASSY, MECHANISM DECK REMOVAL
7 Screw +BVTP 2.6 × 8
Press the EJECT button and open the cassette lid.
Mechanism Deck (TCM-220WR2E)
2
8
4 Flat wire (11 core) 5 Flat wire (21 core) 1
3
1 6 Screw +BVTP 3 × 8
--4--
2-3.
MAIN BOARD, RESISTOR BOARD, FRONT PANEL ASSY REMOVAL
4 Bracket (H/S) 3 Screw +BVTP 3 × 8
5 Resistor board
7 Main board
6 Screw +BVTP 3 × 8 1 Screw +BVTP 3 × 8
2 Front panel assy
· Tray (Slide) getting out procedure on the power supply is OFF
Rotate the BU CAM assembly in the direction of the arrow and pull out the slide.
Tray (Slide)
1
BU CAM assy
--5--
SECTION 3 ADJUSTMENTS
3-1.
1.
MECHANICAL ADJUSTMENT
3-2.
1. 2.
ELECTRICAL ADJUSTMENT
2. 3. 4. 5.
PRECAUTION Clean the following parts with a denatured-alcohol-moistened swab: record/playback head pinch roller erase head rubber belts capstan idlers Demagnetize the record/playback head with a head demagnetizer. Do not use a magnetized screwdriver for the adjustments. After the adjustments, apply suitable locking compound to the parts adjusted. The adjustments should be performed with the rated power supply voltage unless otherwise noted.
DECK SECTION The adjustment should be performed in the publication. (Be sure to make playback adjustment at first.) The adjustment and measurement should be performed for both L-CH and R-CH. · Switch position DOLBY NR switch : OFF FUNCTION button : OFF EFFECT switch : OFF DBFB switch : OFF Deck section electrical adjustments are made in test mode by press key switch same time CD STOP DECK A STOP and DECK B STOP button. Input point and output level measurement point.
3.
4. · Torque Measurement Mode Forward Forward Back Tension Reverse Reverse Back Tension FF, REW Torque Meter CQ-102C CQ-102C CQ-102RC CQ-102RC CQ-201B Meter Reading 36 to 61g·cm (0.50 0.84 oz·inch) 2 to 6g·cm (0.028 0.083 oz·inch) 36 to 61g·cm (0.50 0.84 oz·inch) 2 to 6g·cm (0.028 0.083 oz·inch) 61 to 143g·cm (0.85 1.99 oz·inch)
· Tape Tension Measurement Mode Forward Reverse Tension Meter CQ-403A CQ-403R Meter Reading more than 100 g (3.53 oz) more than 100 g (3.53 oz) · Test Tape Tape P-4-A100 P-4-L300 WS-48B 0 dB=0.775V Record/Playback Head Azimuth Adjustment DECK A DECK B Signal 10 kHz, 10 dB 315 Hz, 0dB 3 kHz, 0dB Used for Head Azimuth Adjustment Level Adjustment Tape Speed Adjustment
Procedure: 1. Forward Playback mode Reverse Playback mode
--6--
2.
Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB.
Tape Speed Adjustment
DECK A
DECK B
Note: Start the Tape Speed adjustment as below after setting to the test mode. Set to test mode. (Press key switch same time CD STOP DECK A STOP and DECK B STOP button.) Test mode off. (Power off.) Procedure: · Perform high speed adjustment before normal speed adjustment. Mode: Playback
3.
Playback Mode Speed Deck A *High B A Normal B Adjustment RV652 RV652 RV651 RV651 Frequency counter 5,910 to 6,090 Hz 2,910 to 3,090 Hz
* Continue to press HIGH SPEED DUBBING switch (S259) in playback mode : High speed playback. Frequency difference between the beginning and the end of the tape should be within ± 3%. Frequency difference between deck A and deck B the beginning of the tape should be within 1.5 %. Adjustment Location: AUDIO board (See page 8) 4. 5. Change the playback mode and repeat the steps 1 to 3. After the adjustment, lock the adjustment screw with suitable locking compound. Sample Value of Wow and flutter W.RMS (JIS) within 0.3% (test tape: WS-48B) Playback level Adjustment DECK A Procedure: -- FWD playback Mode --
test tape P-4-L300 (315 Hz, 0 dB) set
Adjustment Location: -- Record/playback head (Deck A and B) --
DECK B
VTVM + Output level measurement point (See page 6)
Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within adjustment level as follows. Adjustment Level: LINE OUT level : 8.2 to 7.2 dB (301.5 to 338.3 mV) Level Difference between Channels : within 0.5 dB Confirm the OUTPUT level does not change in playback mode while changing the mode from playback to stop several times. Adjustment Location: AUDIO board (See page 8)
--7--
Record Bias Adjustment Procedure: 1. Record mode
DECK B
Adjustment Level: OUTPUT level: 23.8 dB ± 1.0 dB (56.1 to 44.6 mV) Adjustment Location: MAIN board Adjustment Location : [AUDIO BOARD] -- Component Side --
RV301 : Playback Level (Deck B L-CH) RV401 : Palyback Level RV651 : Tape Speed (Normal) (Deck B R-CH) RV652 : Tape Speed (Hight) RV341 : Record Bias (L-CH) RV441 : Record Bias (R-CH) RV311 : Playback Level (Deck A L-CH)
1) 315 Hz 69.0mV (23.8dB) : STR-W550/W770AV 2) 10 kHz 38.8mV (26dB) : jig (PFJ-1)
AF OSC
attenuator set
blank tape CS-123
Input point (See page 6)
2.
Mode: Playback
RV411 : Playback Level (Deck A R-CH)
[MAIN BOARD] -- Component Side -- 3. 4. Confirm playback the signal recorded in step 1 become adjustment level as follows. If these levels do not adjustment level, adjustment the RV341 (L-CH) and RV441 (R-CH) to repeat steps 1 and 4.
RV451 Record Level (R)
Adjustment level: Playback output of 315 Hz to playback output of 10 kHz: 0 ± 1.0 dB (0 ± 4.5mV). Adjustment Location: AUDIO board Record Level Adjustment DECK B Procedure: 1. Record mode
CNB108 RV401 Record Level (L)
2. 3. 4.
Playback mode Confirm playback the signal recorded in step 1 become adjustment level as follows. If these levels do not adjustment level, adjustment the RV401 (L-CH) and RV451 (R-CH) to repeat steps 1 and 4.
--8--
CD SECTION Note : 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10M impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. Focus Bias check
S Curve Check
Procedure: 1. Connect oscilloscope to test point TP (FEO). 2. Connect between test point TP (FOK) and GND by lead wire. 3. Turn Power switch on. 4. Put disc (YEDS-18) in and turned Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.) 5. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3±1 Vp-p.
S-curve waveform
Procedure: 1. Connect oscilloscope to test point TP (RF). (GND terminal : VC) 2. Turned Power switch on. 3. Put disc (YEDS-18) in and playback. 4. Confirm that the shape " " can be clearly distinguished at the center of the waveform and check the RF signal level. · RF signal 6. After check, remove the lead wire connected in step 2. Note: · Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. · Take sweep time as long as possible and light up the brightness to obtain best waveform. RF Level Check
Procedure: 1. Connect oscilloscope to test point TP (RF) on BD board. 2. Turned Power switch on. 3. Put disc (YEDS-18) in and playback. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not. Note: Clear RF signal waveform means that the shape " " can be clearly distinguished at the center of the waveform. · RF signal
--9--
E-F Balance (1 Track Jump) check (Without remote commander)
Procedure: 1. Connect oscilloscope to test point TP (TEO) on BD board. 2. Turned Power switch on. 3. Put disc (YEDS-18) in to play the number five track. 4. Press the "P (Pause)" button. (Becomes the 1 track jump mode) 5. Check the level B of the oscilloscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following: AB × 100 = ±7 (%) 2 (A + B)
1 track jump waveform
Center of the waveform B A (DC voltage)
0V
symmetry level : 500 mV ± 100 mVp-p
Adjustment Location: [BD BOARD] (Conductor Side)
RF VC
CNU101
FOK IC101 IC I02
TEO GND FEO
IC103
CNU102
-- 10 --
SECTION 4 DIAGRAMS
4-1. BLOCK DIAGRAM 4-2. CIRCUIT BOARDS LOCATION
CONNECTOR BOARD SENSOR BOARD MOTOR (TURN) BOARD BD BOARD MOTOR BOARD
MOTOR (SLIDE) BOARD
CD PANEL BOARD
TC (A) BOARD
RESISTOR BOARD LEAF SWITCH BOARD
TC PANEL BOARD
MAIN BOARD
AUDIO BOARD
TC (B) BOARD
-- 11 --
-- 12 --
-- 13 --