Sony HTC-W555 Service Manual
HTC-W555
MICROFILM
SERVICE MANUAL
HTC-W555 is the deck and CD
section in MHC-W555/W777.
Model Name Using Similar Mechanism HCD-H991AV
CD
SECTION
T APE
DECK
SECTION
CD Mechanism Type CDM38-5BD29A
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213B/S-N
Model Name Using Similar Mechanism NEW
T ape T r ansport Mechanism T ype TCM-230A WR1
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
SPECIFICATIONS
COMPACT DISC DECK
– 1 –
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
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 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.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER PR ODUCT MARKING is located on
the rear exterior.
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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.
The following
caution label is
located inside of
the unit.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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.
– 2 –
TABLE OF CONTENTS
1. SERVICING NOTE ..........................................................4
2. GENERAL ..........................................................................7
3. DISASSEMBLY
3-1. Loading Panel........................................................................ 8
3-2. Back Panel and CD Mechanism Deck ..................................8
3-3. Front Panel ........................................................................... 9
3-4. TC Mechanism Deck and Cassette Holder ........................... 9
3-5. Disc Tray ........................................................................... 10
4. MECHANICAL ADJUSTMENTS .......................... 11
5. ELECTRICAL ADJUSTMENTS ...............................11
6. DIAGRAMS
6-1. Circuit Boards Location ......................................................15
6-2. Block Diagrams
• CD Section ....................................................................... 17
• Deck Section .................................................................... 19
• Main Section .................................................................... 21
6-3. Printed Wiring Board – CD Section – .................................25
6-4. Schematic Diagram – CD Section –.................................... 27
6-5. Schematic Diagram – Deck Section –................................. 29
6-6. Printed Wiring Board – Deck Section – .............................. 31
6-7. Printed Wiring Board – Main Section – .............................. 33
6-8. Schematic Diagram – Main (1/2) Section – ........................ 35
6-9. Schematic Diagram – Main (2/2) Section – ........................ 37
6-10. Printed Wiring Board – Leaf SW Section – ...................... 39
6-11. Schematic Diagram – Leaf SW Section –......................... 39
6-12. Printed Wiring Board – Panel Section –............................ 41
6-13. Schematic Diagram – Panel Section – ..............................43
6-14. Schematic Diagram – CD Motor Section –....................... 45
6-15. Printed Wiring Board – CD Motor Section – ....................47
6-16. IC Block Diagrams............................................................ 49
6-17. IC Pin Functions................................................................ 52
7. EXPLODED VIEWS
7-1. Case and Back Panel Section .............................................. 59
7-2. Front Panel Section ............................................................. 60
7-3. CD Mechanism Section 1 (CDM38-5BD29A) ................... 61
7-4. CD Mechanism Section 2 (CDM38-5BD29A) ................... 62
7-5. Base Unit Section (BU-5BD29A) ....................................... 63
7-6. TC Mechanism Section 1 (TCM230AWR1) ....................... 64
7-8. TC Mechanism Section 2 (TCM230AWR1)...................... 65
8. ELECTRICAL PARTS LIST ........................................ 66
– 3 –
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
1
Remove the Case.
3
Pull-out the disc tray.
2
Turn the cam to the
direction of arrow.
Note for Installation (ROTARY ENCODER)
BU cam
Groove
Note:When attaching the Base unit, Insert the
section A into the groove of BU cam.
Section A
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
– 4 –
Connection and Operations of the Unit by Itself
This unit cannot be operated by itself as it does not come with a power supply.
Connect STR-W555/W777 as shown in “Connection 1” before beginning servicing.
Connection 1: If there is STR-W555/W777.
STR-W555/W777
SYSTEM CABLE 17P
AC IN
SET
Use a power supply jig (PFJ-1) if the STR-W555/W777 is not available.
Connect the conversion jig for connection (J-2501-138-A) as shown in “Connection 2” before beginning servicing.
Connection 2: If there is not STR-W555/W777.
FH-E939,838,737
MHC-6600,5600,3600,2600
CDP/TC
Power SW
Service Box (PFJ-1)
Conversion
Jig
(J-2501-138-A)
Connector
cable 17P
(Supplied with PFJ-1)
Conversion Jig or Set)
SYSTEM CONTROL
Set
Connector
cable 17P
(Supplied with
To operate the unit by itself, turn on the power of the conduction jig (PFJ-1), and press the π (TAPE A) , π (TAPE B) , and · (TAPE
B) buttons together in this order.
As this unit is not equipped with fast forward and rewind buttons, buttons need to be combined and pressed together for different functions
when operating the unit by itself. (See Table-2.)
However, it will not operate properly if operations are performed without switching the functions.
Perform the following procedure to switch the functions before operating the unit.
The function selected is indicated by the DISC NUMBER indicator.
Table 1 Switching the Functions Table 2 Pressing Combination of Buttons When Operated by Itself
Function
Operation
Indicator
CD p (CD) button 1` 2` 3
+ HI-SPEED DUBBING button
TAPE A p (CD) button 1` 2 3
+ r REC button
TAPE B p (CD) button 12` 3
+ ª (TAPE A) button
Deck
CD + (AMS) π (TAPE B) button + DISC3 button
TAPE A + (AMS) DISC SKIP button + · (TAPE B)
TAPE B = (AMS) DISC SKIP button + ª (TAPE B)
Function
Operation
= (AMS) π (TAPE B) button + DISC1 button
) π (TAPE A) button + DISC3 button
0 π (TAPE A) button + DISC1 button
) DISC SKIP button + · (TAPE A)
0 DISC SKIP button + ª (TAPE A)
The function can be differentiated by the lighting of this part of the indicator.
↓↓
1` 2` 3
– 5 –
Cold Reset
NOTE: This is the mode for operating the unit by itself. Take note that the operating method differs when connected to the STR-W555/
W777. This method is described in the manuals of the STR-W555 and STR-W777. Refer to these manuals for details.
This mode is used for initializing the RAM contents. Perform this mode when returning the repaired product to the customer.
Precedure:
1. After turning ON the power of the conduction jig (PFJ-1), press the π (TAPE A) button, π (TAPE B) button, and · (TAPE B) b utton
together in this order.
2. Press the P (TAPE) button while pressing the p (CD) button.
CD Delivery Mode
NOTE: This is the mode for operating the unit by itself. Take note that the operating method differs when connected to the STR-W555/
W777. This method is described in the manuals of the STR-W555 and STR-W777. Refer to these manuals for details.
This mode moves the pickup to areas where the anti-vibration is stronger. Perform this mode when returning the repaired product
to the customer.
Precedure:
1. After turning ON the power of the conduction jig (PFJ-1), press the π (TAPE A) button, π (TAPE B) button, and · (T APE B) button
together in this order.
2. Press the CD SYNCHRO button while pressing the p (CD) button.
3. Wait untill r (TAPE B) indicator is on befor disconnect from the conduction jig (PFJ-1).
LED All Lit Mode
NOTE: Always perform this mode when operating the unit by itself.
This mode is used for lighting up the whole LED.
Precedure:
1. After turning ON the power of the conduction jig (PFJ-1), press the π (TAPE A) button, π (TAPE B) button, and · (TAPE B) b utton
together in this order.
2. The whole LED can be turned on and off each time the π (TAPE A) button is pressed while pressing the p (CD) button.
3. Press the three buttons in step 1 at the end.
Key Check Mode
NOTE: Always perform this mode when operating the unit by itself.
This mode is used for checking the key inputs of the buttons of the unit.
Precedure:
1. After turning ON the power of the conduction jig (PFJ-1), press the π (TAPE A) button, π (TAPE B) button, and · (TAPE B)
button together in this order.
2. Press the DOLBY NR button while pressing the p (CD) button to set the k ey check mode, and the indicator displays “ 3 ·P”.
3. The number of buttons pressed are indicated in binary digits by the indicator LED. Buttons pressed once are not counted when pressed
again.
4. Press the two buttons in step 2 at the end.
Display: 1` 2` 3
MSB ↑↑ LSB
Aging Mode
NOTE: Perform the following procedure only when operating the unit by itself.
This mode is used for checking the operations of the CD player and tape deck.
The operations are the same as the aging mode described in the service manual for the STR-W555/W777. However as this unit does
not have a fluorescent indicator tube, operating states and error statuses cannot be checked.
If the STR-W555/W777 is available, set the aging mode according to those service manuals.
Aging continues in the following sequence as long as no errors occur.
Aging of CD player (12 minutes)
Aging of deck A
Aging of deck B
12 minutes
Precedure:
1. After turning ON the power of the conduction jig (PFJ-1), press the π (TAPE A) button, π (TAPE B) button, and · (TAPE B) b utton
together in this order.
2. Press the π (TAPE B) button while pressing the p (CD) button to set the aging mode and start aging.
3. To end aging, press the three buttons in step 1.
– 6 –
Front Panel
1
31
SECTION 2
GENERAL
234 5 7 869
10
141112 13
30
29
28
27
LOCATION OF PARTS AND CONTROLS
1 DISC SKIP/EX-CHANGE button
2 DISC 1 button
3 DISC 2 button
4 DISC 3 button
5 DISC NUMBER 1` 2` 3 indicator
6 ( (CD play) indicator
7 P (CD pause) indicator
8 6 OPEN/CLOSE button
9 p (CD stop) button
10 ·P (CD play pause) button
11 œ (Deck A play) indicator
12 r (Deck B rec) indicator
13 P (Tape (Deck B pause)) indicator
14 œ (Deck B play) indicator
15 · (Deck B play) button
16 ª (Deck B play) button
15
16
17
18
192021222326 2425
17 π (Deck B stop) button
18 § (Deck B eject) button
19 Casette lid (Deck B)
20 DIRECTION MODE button
21 P PAUSE button
22 r REC button
23 HI-SPEED DUBBING button
24 CD SYNCHIRO button
25 DOLBY NR button
26 Casette lid (Deck A)
27 § EJECT (Deck A) button
28 π (Deck A stop) button
29 ª (Deck A play) button
30 · (Deck A play) button
31 CD Disc tray
– 7 –
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
3
Loading panel
(Remove two claws)
Two claws
2
Pull-out the disc tray.
1
Turn the cam to the
direction of arrow.
3-2. BACK PANEL AND CD MECHANISM DECK
!¢
CD mechanism deck
!™
(CN111)
!º
Screw
(BVTP3x10)
!£
Connector
(CN112)
7
Connector
Back panel
4
Two screws
(BVTP3x10)
!¡
(19core, CNS103)
6
Two screws
(BVTP3x8)
5
Three screws
(BVTP3x10)
Flat type wire
1
Screw
(BVTP3x8)
2
Cover (SC)
3
System cable
– 8 –
9
Dummy board
8
Two screws
(BVTP3x10)
3-3. FRONT PANEL
A
2
Three screws
(BVTP2.6x8)
3
Two screws
(BVTP2.6x8)
4
TC mechanism deck
5
Two springs
C
D
D
C
6
Remove the Cassette holder A
and Cassette holder B.
(Remove C first, and remove D.)
7
Eject button A
8
Eject button B
Note for installation
Set the Spring to be at the position
in the figure.
B
8
Front panel
(Remove the catcer)
3
Flat type wire
(15core, CNS101)
6
Lead (with connector)
2
Flat type wire
(17core, CNS104)
Catcher
1
Flat type wire
(13core, CNS102)
7
Connector (CNP105)
4
Connector
(CN113)
3-4. TC MECHANISM DECK AND CASSETTE HOLDER
1
Push the 6 buttons.
(Arrow
A
and arrow B.)
5
Two screws
(BVTP3x10)
– 9 –
3-5. DISC TRAY
4
Two claws
2
Pull-out the disc tray.
5
Remove the disc tray.
3
Flat type wire (8 core)
Note: When installing the Disc tray, pull around the flat type wire to
pass through the claw A and claw B, as shown in the figure.
Claw
Claw
A
B
Turn the cam the
1
direction of arrow.
– 10 –
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
Precaution
1.Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2.Demagnetize the record/playback head with a head demagnetizer.
3.Do not use a magnetized screwdriver for the adjustments.
4.After the adjustments, apply suitable locking compound to the
parts adjusted.
5.The adjustments should be performed with the rated power supply voltage unless otherwise noted.
Torque Measurement
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
Read before adjustments
To adjust the unit, operate the unit by itself using the conduction jig
(PFJ-1).
For details on switching functions and fast forwarding the unit, etc.
when operating it by itself, refer to “Connection and Operations of
the Unit by Itself” on page 5 of Servicing Notes.
• Turning on the power
When operating the unit by itself:
1.After turning ON the power of the conduction tool (PFJ-1), press
the π (TAPE A) button, π (TAPE B) button, and · (TAPE
B) button together in this order.
Inputting/outputting audio signals:
Use the jack of the power supply jig (PFJ-1).
Output point
Input point
PFJ-1
DECK SECTION 0 dB=0.775V
1.Demagnetize the record/playback head with a head damagnetizer.
2.Do not use a magnetized screwdriver for the adjustments.
3.After the adjustments, apply suitable locking compound to the
parts adjusted.
4.The adjustments should be performed with the rated power supply voltage unless otherwise noted.
5.The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit adjustment.)
6.The adjustments should be performed for both L-CH and R-CH.
7.Switches and controls should be set as follows unless otherwise
specified.
Signal Used forTape
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1.Mode : Playback
test tape
P-4-A100
(10kHz, -10dB)
set
PFJ-1
level meter
output point
– 11 –
)
2. Turn the adjustment screw and check output peaks. If the peaks
e
do not match for L-CH and R-CH, turn the adjustment screw
so
that outputs match within 1 dB of peak.
L-CH
peak
screw
position
R-CH
peak
output
level
within
1 dB
L-CH
peak
R-CH
peak
within 1dB
screw
position
3. Mode: Playback
test tape
P-4-A100
(10kHz, -10dB)
set PFJ-1
output point
oscilloscop
Tape Speed Adjustment (Deck B)
Note: Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the speed will switch to double speed or
normal speed each time the HI-DUB button is pressed.
Procedure:
Press the p (CD) button while pressing the DIRECTION MODE
button.
1. Insert the WS-48B into deck B, while pressing the p (CD)
button, press the ª (TAPE A) button, set the function to “deck
B”.
2. Press the · button of deck B.
3. Press the HI-DUB button and play the tape at double speed.
4. Adjust RV1001 of the LEAF SW board so that the reading of
the frequency counter becomes 6000 ± 180 Hz.
5. Press the HI-DUB button and play the tape at normal speed.
6. Adjust RV1002 of the LEAF SW board so that the reading of
the frequency counter becomes 3000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
Playback Level Adjustment (Deck A, Deck B)
Waveform of oscilloscope
in phase 45
good
°
90
135
°
°
wrong
180
°
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
Procedure:
Mode: Playback
test tape
P-4-L300
(315Hz, 0dB)
set
PFJ-1
level meter
output point
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
Adjustment level:
Output point from PFJ-1 playback level: 301.5 to 338.3 mV (–8.2
to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: A UDIO board
Adjustment Location
[LEAF SW BOARD]
RV1001(High Speed)
RV1002(Normal Speed
Reverse
Foward
RV1002 RV1001
– 12 –
Record Bias Adjustment (Deck B)
recorded
position
level meter
set
PFJ-1
output
point
AF OSC
blank tape
CS-123
PFJ-1
set
attenuator
600
Ω
INPUT POINT
315Hz 50 mV (–23.8 dB)
Record Level Adjustment (Deck B)
Procedure:
1. Press the p (CD) button while pressing the DIRECTION
MODE button.
2. While pressing the p (CD) button, press the ª (TAPE A)
button, set the function to “deck B”.
3. Insert a tape into deck B, press the r REC button, and then
press the ( button to start recording.
4. Mode: Record
INPUT POINT
AF OSC
attenuator
1) 315 Hz
2) 10 kHz
600
Ω
PFJ-1
} 50 mV (–23.8 dB)
blank tape
CS-123
set
5. Mode: Playback
recorded
position
PFJ-1
set
level meter
Procedure:
1. Press the p (CD) button while pressing the DIRECTION
MODE button.
2. While pressing the p (CD) button, press the ª (TAPE A)
button, set the function to “deck B”.
3. Insert a tape into deck B, press the r REC button, and then
press the ( button to start recording.
4. Mode: Record
5. Mode: Playback
output
point
6. Confirm playback the signal recorded in step 2 become adjustment level as follows.
If these levels do not adjustment le vel, adjust the R V341 (L-CH)
and R V441 (R-CH) on the A UDIO board to repeat steps 3 and 4.
Adjustment level: The playback output of 10 kHz lev el difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
Adjustment Location: MAIN board
Adjustment Location:
RV341(Lch),RV441(Rch)
Record Bias
RV301 RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV411
RV311
6. Confirm playback the signal recorded in step 2 become adjustment level as follows.
If these levels do not adjustment le vel, adjust the R V301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
Adjustment level:
Output point from PFJ-1 playback level: 47.2 to 53.0 mV (–24.3 to
–23.3 dB)
[AUDIO BOARD] (Conductor Side)
[MAIN BOARD] (Component Side)
CNS102
CNS101
RV351
Record
Level (R ch)
RV301
Record
Level (L ch)
CNP105
– 13 –
CD SECTION
E-F Balance (1 Track Jump) check
Note:
1. CD Block is basically constructed 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 10MΩ 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.
S Curve Check
oscilloscope
BD board
TP (FEO)
TP (VC)
Procedure :
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and Ground 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 conf irm peak to peak level within 3 ± 1Vp-p.
oscilloscope
BD board
TP (TEO)
TP (VC)
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.
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:
• A/B x 100 = less then ± 7 (%)
• B = 500 ± 100 mVp-p
1 track jump waveform
Center of the waveform
B
A (DC voitage)
0V
S-curve waveform
symmetry
A
Within 3
±
1 Vp-p
B
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sur e than the ratio of
A : B or B : A is more than 10 : 7.
• Tak e sweep time as long as possible and light up the brightness to obtain best waveform.
RF Level Check
oscilloscope
BD board
TP (RF)
TP (VC)
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.
level : 500 mV
±
100 mVp-p
Adjustment Location:
[BD BOARD] (Conductor Side)
TP (RF)
IC101
CN101
TP
(TEO)
TP
(FEO)
TP
(GND)
IC103
IC102
TP
(VC)
TP
(FOK)
IC102
Symmetry
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.3
±
0.3 Vp-p
– 14 –
6-1. CIRCUIT BOARDS LOCA TION
d
SECTION 6
DIAGRAMS
CD (P) board
TC LED board
TC (A) board
TC (P) board
REGULATOR boar
MAIN board
TC (B) board
SENSOR board
LEAF SW board
MOTOR (TURN) board
CONNECTOR board
BD board
MOTOR (SLIDE) board
AUDIO board
– 15 –
HTC-W555
6-2. BLOCK DIAGRAMS
– CD SECTION –
OPTICAL PICK-UP BLOCK
B+
K
E
D
A
C
B
F
LASER
DIODE
DETECTOR
IC107
1
D.OUT
FOCUS/TRACKING SERVO.
RF AMP
IC101 (1/2)
A
D
C
B
1
4
2
5
10
6
LD DRIVE
Q101
38
39
41
42
2
1
45
47
3637LD
PD1
PD2
F
E
FEI
FEO
TEO
TEI
PD
SENS1
SENS2
XRST
23
RF O
LOCK
C.OUT
FE O
FE M
TA M
TA O
DATA
XLT
CLK
FOK
33
19
24
25
26
6
7
12
13
22
21
20
27
RF
44
LOCK
29
14
CNIN
15
SEIN
DATAO
XLTO
15 16 17
71
CLKO
DOUT
27
MDP
FOK
23
SPOD
21
CD DIGITAL
OUT
OPTICAL
DIGITAL SIGNAL PROCESSOR
S101
LIMIT
IC103
XLAT
DATA
10 11 12 75
CLOK
SQCK
SENS
SCOR
SQSO
8
79 100
XRST
89 • 90
XTAI
LOUT1
LOUT2
16.9344MHz
•
XTAO
X101
86
93
L-CH
R-CH
CD CLK
CD DATA
SENS2
SCOR
SQ DATA
SQ CLK
SENS
M102
SLED MOTOR
M101
SPINDLE
MOTOR
09
XRST
TRACKING
FOCUS
COIL
11
M
•
12
13
M
•
14
COIL
2-AXIS
DEVICE
SLED/SPINDLE
MOTOR DRIVE
IC102 (2/2)
SLED MOTOR
DRIVE
SPINDLE MOTOR
DRIVE
T+
–
T
–
F
F+
6
3
15
16
18
17
9
MUTE
TRACKING
COIL DRIVE
FOCUS/TRACKING
COIL DRIVE
IC102 (1/2)
FOCUS
COIL DRIVE
SLED
SERVO
IC101 (2/2)
SL P
SL O
S801
DET
TABLE
SENSOR
IC702
DISC
SENSOR
IC703
ROTARY
ENCODER
S811
Q701
27
26
TURN
MOTOR DRIVER
IC701
M701
1416
TURN
MOTOR
M801
SLIDE
MOTOR
M
M
7
OUT1
2
OUT2
4
7
MOTOR DRIVER
OUT2
OUT1
SLIDE
IC801
IN1
IN2
RIN
FIN
OPEN/CLOSE
3
6
2
10
XLAT
T. SENS
DISC SENS
ENC 1
ENC 2
ENC 3
OPEN
TBL.L
TBL.R
LOAD IN
LOAD OUT
A
MAIN
SECTION
(Page 21)
• R CH: Same as L ch
• SIGNAL PATH
: CD
: Digital out
– 17 – – 18 –
– DECK SECTION –
HTC-W555
HP101
PB HEAD
(DECK A)
REC/PB HEAD
(DECK B)
HRPE101
ERASE HEAD
PB A/B
MS OUT
PB L
LM ON/OFF
NORM/HIGH
NR ON/OFF
REC/PB/PASS
REC L
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
RELAY REC/PB
CAPM EMG (+)
CAPM EMG (–)
CAPM ON/OFF (+)
CAPM ON/OFF (–)
CAP M H / L
A SHUT
B
MAIN
SECTION
(Page 21)
17
2
DOLBY NR
RECOUT
C
32 33
S1008
B CrO
19
B 120/70
PAS
BIAS SW
M
2
DOL
DOLBY
TYPE B
M1
CAPSTAN
MOTOR
28
27
M
MS
26
PB OUT
LM ON/
OFF
NORM/
HIGH
NR ON/
OFF
PB
RIN
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
CAP MOTOR
CONTROL
Q336-343
CONTROL
RV1002
NORMAL
SPEED
SPEED
Q1001
40
25
18
23
24
44
20
22
15
RV1001
HIGH
SPEED
SWITCH
Q335
REEL
DETECT
IC1001
S1004
A CrO
RV311
4
PLAYBACK
LEVEL
DECK A
RV301
PLAYBACK
LEVEL
DECK B
RV341
REC
BIAS
REC BIAS
BIAS OSC
T621, Q621, 622
IC611
L
R
L
R
X
R CH
R CH
3
P
ERASE BIAS
IC601
1
IC602
R
REC/PB
16
PB-A/B
A IN
48
B IN
46
RV301
REC LEVEL
+7.5V
Q623
EQIN
38
EQOUT
36
A 120/70
70
120
DOLBY NR
IC301
39
REEL
DETECT
IC1002
S1001 (A PLAY)
• R CH : Same as L ch
• SIGNAL PATH
+5V
S1002 (B PLAY)
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
09
• PLUNGER SOLENOID is supplied
as the MECHANICAL BLOCK ASSY.
A DECK/
B DECK
PLUNGER
TRIGGER
MOTOR
CONTROL
Q331-334
S1003
(A HALF)
S1005
(REC A)
S1006
(B HALF)
S1009
(REC B)
+5V
+5V
B SHUT
A PLAY
B PLAY
B HALF
B TRIG
A TRIG
– 19 – – 20 –
HTC-W555
– MAIN SECTION –
A+7.5V
D+5V
A+5V
+7.5V REG
Q852
+5V SW
Q102-104
M12V
+5V
+12V REG
3 1
IC851
+5V REG
3 1
IC852
B
DECK
SECTION
(Page 20)
A
CD
SECTION
(Page 18)
PB L
REC L
RELAY REC/PB
A SHUT
B SHUT
B HALF
A HALF
A PLAY
B PLAY
PB A / B
NORM/HIGH
BIAS ON/OFF
RM ON/OFF
NR ON/OFF
REC/PB PASS
CAPM EMG(-)
CAPM ON/OFF(-)
CAPM ON/OFF(+)
CAPM EMG(+)
ALC ON/OFF
LM ON/OFF
CAP M H/L
A TRG
B TRG
MS OUT
L CH
TBL. L
TBL. R
SCOR
T. SENS
SENS 2
SENS
X RST
CD CLK
CD DATA
DISC SENS
SQ CLK
SQ DATA
X LAT
OPEN
ENC 1
ENC 2
ENC 3
LOAD IN
LOAD OUT
D224-230
LED
ON/OFF
SWITCH
Q214-223
97
TC RELAY
26
A SHUT
27
B SHUT
28
B HALF
98
A HALF
95
A PLAY
96
B PLAY
94
PB A/B
93
NORM/HI
BIAS
92
90
REC MUTE
89
NR ON/OFF
REC/PB
88
CAPM-EMG(-)
85
CAPM ON/OFF(-)
86
100
CAPM ON/OFF(+)
CAPM EMG(+)
1
99
ALC ON/OFF
TC MUTE
87
82
CAPM-H/N
84
A TRG
83
B TRG
31
AMS IN
DECO1
52
66
DECO2
CD-PAUSE
65
67
CD-PLAY
72
DISC1
DISC2
54
DISC3
70
69
EXIST1
53
EXIST2
68
EXIST3
60
TBL L
61
TBL R
SCOR
18
76
T SENS
73
SENSE 2
74
SENS
57
XRST
48
CD CLK
47
CD DATA
75
DISC SENS
36
SQ CLK
34
SQ DATA IN
58
XLAT
OPEN
81
ENC1
80
ENC2
79
ENC3
78
LOAD IN
64
LOAD OUT
63
MASTER CONTROL
IC101
M+7V
A-7.5V
CD-POWER
IIC DATA
IIC CLK
RESET
LED1
LED2
LED3
LED4
LED5
LED6
KEY A
KEY B
+7V REG
3
46
55
56
15
RESET
IC101
D110
X1
X2
+5V
11
X101
5MHz
10
2
3
4
5
6
7
IC853
-7.5V REG
Q855
1
LED
ON/OFF
SWITCH
Q201-206
+
-
D201-206
RECT
D901-904
(CD R)
R CH
(PB R)
R CH
(REC R)
R CH
17
13
3
CNB108
2
9
SYSTEM
CONTROL
7
6
4
14
16
TO
STR-W555
• R CH: Same as L ch
• SIGNAL PATH
: CD
29
30
KEY
MATRIX
: PB
: REC
09
– 21 –
– 22 –
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