Sony HTC-W555 / MHC-W555 Service Manual ▷ View online
– 13 –
Adjustment Location: MAIN board
Adjustment Location:
Adjustment Location:
[AUDIO BOARD] (Conductor Side)
[MAIN BOARD] (Component Side)
[MAIN BOARD] (Component Side)
Record Bias 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
6. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.
If these levels do not adjustment level, adjust the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
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
5. Mode: Playback
6. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
If these levels do not adjustment level, adjust the RV301 (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)
Output point from PFJ-1 playback level: 47.2 to 53.0 mV (–24.3 to
–23.3 dB)
5. Mode: Playback
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
Playback Level (Deck B)
RV301 RV401
RV341(Lch),RV441(Rch)
Record Bias
Record Bias
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
Playback Level (Deck A)
RV311
RV411
CNS102
CNP105
CNS101
RV351
Record
Level (R ch)
RV301
Record
Level (L ch)
recorded
position
position
level meter
set
PFJ-1
output
point
recorded
position
position
level meter
set
PFJ-1
output
point
AF OSC
INPUT POINT
1) 315 Hz
2) 10 kHz
1) 315 Hz
2) 10 kHz
blank tape
CS-123
CS-123
PFJ-1
set
attenuator
600
Ω
} 50 mV (–23.8 dB)
AF OSC
blank tape
CS-123
CS-123
PFJ-1
set
attenuator
600
Ω
INPUT POINT
315Hz 50 mV (–23.8 dB)
315Hz 50 mV (–23.8 dB)
– 14 –
CD SECTION
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 10M
3. Use an oscilloscope with more than 10M
Ω
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.
checks.
S Curve Check
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
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.)
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical be-
tween A and B. And confirm peak to peak level within 3 ± 1Vp-p.
S-curve waveform
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 bright-
ness 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 sig-
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 sig-
nal 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 waveform
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
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:
Confirm the following:
• A/B x 100 = less then ± 7 (%)
• B = 500 ± 100 mVp-p
• B = 500 ± 100 mVp-p
1 track jump waveform
Adjustment Location:
[BD BOARD] (Conductor Side)
E-F Balance (1 Track Jump) check
oscilloscope
BD board
TP (FEO)
TP (VC)
TP (VC)
symmetry
A
B
Within 3
±
1 Vp-p
oscilloscope
BD board
TP (RF)
TP (VC)
TP (VC)
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.3
±
0.3 Vp-p
oscilloscope
BD board
TP (TEO)
TP (VC)
TP (VC)
0V
Center of the waveform
B
Symmetry
A (DC voitage)
level : 500 mV
±
100 mVp-p
TP (RF)
TP
(FOK)
(FOK)
IC101
TP
(VC)
TP
(GND)
(GND)
TP
(TEO)
TP
(FEO)
(FEO)
IC103
IC102
IC102
CN101
– 15 –
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
MAIN board
REGULATOR board
TC (A) board
TC LED board
TC (B) board
TC (P) board
CD (P) board
AUDIO board
LEAF SW board
SENSOR board
CONNECTOR board
BD board
MOTOR (SLIDE) board
MOTOR (TURN) board
6-2. BLOCK DIAGRAMS
– CD SECTION –
– 17 –
– 18 –
HTC-W555
• R CH: Same as L ch
• SIGNAL PATH
: CD
: Digital out
• SIGNAL PATH
: CD
: Digital out
OPTICAL PICK-UP BLOCK
DETECTOR
K
B+
A
D
C
B
E
F
A
D
C
B
1
4
2
5
5
10
6
38
39
41
42
2
1
45
47
LD DRIVE
Q101
36
37
LD
PD
XRST
FOK
23
27
FOCUS/TRACKING SERVO.
RF AMP
IC101 (1/2)
6
7
12
13
20
22
21
26
25
24
33
19
44
14
15
PD1
PD2
F
E
FEI
FEO
TEO
TEI
CLK
XLT
DATA
TA O
TA M
FE M
FE O
SENS2
SENS1
C.OUT
LOCK
RF O
27 23
15 16 17
10 11 12
75 8
7 9
100
93
86
89 • 90
X101
16.9344MHz
XTAI
•
XTAO
LOUT1
LOUT2
XRST
SCOR
SQSO
SQCK
SENS
DATA
XLAT
CLOK
DIGITAL SIGNAL PROCESSOR
IC103
RF
29 LOCK
CNIN
SEIN
SEIN
DATAO
XLTO
CLKO
MDP
FOK
21
S101
LIMIT
SPOD
9
LASER
DIODE
TRACKING
COIL DRIVE
27
15
16
FOCUS/TRACKING
COIL DRIVE
IC102 (1/2)
FOCUS
COIL DRIVE
26
18
17
2-AXIS
DEVICE
TRACKING
COIL
FOCUS
COIL
T+
F+
T–
F –
SLED
SERVO
IC101 (2/2)
SLED/SPINDLE
MOTOR DRIVE
IC102 (2/2)
14
16
6
SLED MOTOR
DRIVE
11
•
12
M
M102
SLED MOTOR
SPINDLE MOTOR
DRIVE
3
13
•
14
M
M101
SPINDLE
MOTOR
SL O
SL P
CD CLK
CD DATA
SENS2
SCOR
SQ DATA
SQ DATA
SQ CLK
SENS
XRST
XLAT
09
L-CH
R-CH
A
MAIN
SECTION
MUTE
(Page 21)
M
TABLE
SENSOR
IC702
T. SENS
OPEN
S801
OPEN/CLOSE
DET
OUT1
IN1
IN2
OUT2
M
M701
TURN
TURN
MOTOR
TBL.L
TBL.R
TURN
MOTOR DRIVER
IC701
7
DISC
SENSOR
IC703
ROTARY
ENCODER
S811
Q701
DISC SENS
ENC 1
ENC 2
ENC 3
2
4
7
2
10
M801
SLIDE
MOTOR
OUT2
OUT1
RIN
FIN
SLIDE
MOTOR DRIVER
IC801
LOAD IN
LOAD OUT
3
6
CD DIGITAL
71
D.OUT
1
OUT
OPTICAL
IC107
DOUT
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