Sony HTC-V5550 / MHC-V5550 / MHC-V7770AV Service Manual ▷ View online
— 13 —
Record Level Adjustment (Deck B)
Procedure:
1.
Press the p (CD) button while pressing the DIRECTION
MODE button.
MODE button.
2.
While pressing the p (CD) button, press the ª (TAPE A)
button, set the function to “deck B”.
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
adjustment 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.
adjustment 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.
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)
Adjustment Location: MAIN board
Record Bias Adjustment (Deck B)
Procedure:
1.
Press the p (CD) button while pressing the DIRECTION
MODE button.
MODE button.
2.
While pressing the p (CD) button, press the ª (TAPE A)
button, set the function to “deck B”.
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.
press the ( button to start recording.
4.
Mode: Record
5.
Mode: Playback
6.
Confirm playback the signal recorded in step 2 become
adjustment 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.
adjustment 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.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
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)
recorded
position
position
level meter
set
PFJ-1
output
point
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)
recorded
position
position
level meter
set
PFJ-1
output
point
Adjustment Location
[AUDIO BOARD] (Conductor Side)
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)
[MAIN BOARD] (Component Side)
— 14 —
CD SECTION
Notes:
1. CD block basically constructed to operate without adjustment. There-
fore, check each item in order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated.
3. Use the oscilloscope with more than 10 M
3. Use the oscilloscope with more than 10 M
Ω
impedance.
4. Clean an object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-Curve Check
Connection:
Procedure:
1.
1.
Connect the oscilloscope to TP (FE) and TP (VC) on BD board.
2.
Connect between test point TP (FOK) and Ground by lead wire.
3.
Turned 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.)
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
5.
Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 3.0 ± 1.0 Vp-p.
symmetrical between A and B. And confirm peak to peak level
within 3.0 ± 1.0 Vp-p.
S-curve waveform
6.
After check, remove the lead wire connected in step 2.
Note:
• Try to measure several times to make sure that 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
Connection:
Procedure:
1.
1.
Connect the oscilloscope to TP (RF) and TP (VC) on BD board.
2.
Turned power switch on.
3.
Put disc (YEDS-18) in and press the fl button.
4.
Confirm that the oscilloscope waveform is clear and check RF
signal level is correct or not.
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.
within 3.0 ± 1.0 Vp-p
RF signal waveform
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
and raise vertical sensitivity.
When a general remote commander is not used (1 Track Jump
Check):
Procedure:
1.
Check):
Procedure:
1.
Connect the oscilloscope to TP (TE) and TP (VC) on BD board.
2.
Turned power switch on.
3.
Put disc (YEDS-18) in and press the fl button, and play the
number five track.
number five track.
4.
Press the fl button. (Becomes the 1 track jump mode)
5.
Confirm that the level B of the oscilloscope's waveform and
the A (DC voltage) of the center of the traverse waveform.
Confirm the following:
the A (DC voltage) of the center of the traverse waveform.
Confirm the following:
1 track jump waveform
Connection Location:
[BD Board] (Side A)
A – B
2 (A + B)
×
100 = ± 7 (%)
level: 1.3 ± 0.6 Vp-p
+
–
–
BD board
TP (FE)
TP (VC)
oscilloscope
A
B
symmetry
+
–
–
BD board
TP (RF)
TP (VC)
oscilloscope
(AC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
(with the 10: 1 probe
in use)
TIME/DIV: 500 ns
(with the 10: 1 probe
in use)
level: 1.3 Vp-p
+0.25
–0.20
Center of the waveform
B
symmetry
A (DC voltage)
0V
CN102
CN101
IC103
IC101
TP
(FOK)
TP
(TE)
TP
(FE)
TP (RF)
TP (VC)
TP (VC)
HTC-V5550
— 15 —
— 16 —
VIDEO SECTION
Frequency Adjustment
Connection:
Procedure:
1.
1.
Connect the frequency counter to TP508 (27 MHz) on VIDEO
board.
board.
2.
Turned power switch on.
3.
Press the FUNCTION button to select the CD.
4.
Adjust CT503 on the VIDEO board so that the frequency
counter reading 27.0 MHz ± 80 Hz at stop status.
counter reading 27.0 MHz ± 80 Hz at stop status.
Adjustment Location:
[VIDEO BOARD] (Side A)
+
–
–
TP508 (27 MHz)
VIDEO board
frequency counter
IC505
IC507
TP508
(27 MHz)
CT503
VIDEO
Frequency
Adjustment
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
MAIN board
REGULATOR board
VIDEO IN/OUT board
VIDEO 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
HTC-V5550
6-2. BLOCK DIAGRAMS
— SERVO SECTION —
— 17 —
— 18 —
CD MECHANISM
CONTROLLER
IC502 (1/2)
A/D
CONVERTER
OUT+
OUT–
3
4
7
2
1
5
10
6
4
5
6
16
15
14
13
8
9
19
2
1
77
78
71
55
54
45
47
46
63
20
31
33
34
32
36
38
39
26
93
27
28
29
80
88
89
100
2
4
6
8
10
9
10
4
5
19
20
13
12
27
26
23, 24
A
E
B
C
D
A
A+5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
RF EQ
SWITCH
Q102, 103
RF EQ
AMP
TRACKING
ERROR AMP
RFO
17
RFE
FE
FE BIAS
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
F
F I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
OPTICAL
TRANSCEIVER
IC107
CD OPTICAL
DIGITAL OUT
APC LD
AMP
APC PD
AMP
LD
LD
PD
LASER DIODE
RFAC
MIX
ASYO
ASYI
CTL1
CTL2
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR
EFM
DEMODULATOR
REGISTER
DIGITAL SIGNAL PROCESSOR
IC101 (1/2)(BD BOARD)
MON
MDP
MDS
94 95 96 97
FSW
CLV
PROCESSOR
18-TIMES
OVERSAMPLING
FILTER
NOISE
SHAPER
INTERNAL BUS
32K
RAM
ERROR
CORRECTOR
SUBQ
SQCK
83
SCLK
79
MUTE
76
EXCK
SUBCODE Q
PROCESSOR
SUBCODE P – W
PROCESSOR
SYNC
PROTECTOR
TIMING
GENERATOR 1
TIMING
GENERATOR 2
DATA
DATA
BCK
LRCK
64
XTSL
VCKI
XTAO
62
XTAI
BCLK
LRCK
LRCK
RFCK
GFS
56
C2PO
C2PO
CTL1
DOUT
DIGITAL
OUT
SERIAL/PARALLEL
PROCESSOR
D/A DIGITAL
PROCESSOR
CLOCK
GENERATOR
ADDRESS
GENERATOR
PRIORITY
ENCODER
ENCODER
PEAK
DETECTOR
74
SCOR
73
WFCK
75
SBSO
18
28
SENSE CLK
1
SENSE
5
3
DSP CLK
DSP DATA
4
DSP LATCH
81
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
IN+
IN–
OUT+
OUT–
IN–
IN+
IN–
IN+
15
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
S101
(LIMIT)
A+5V
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU
INTERFACE
CLOK
86
DATA
87
99
XLAT
SENS
FOK
91
92
MIRR
DFCT
IN+, IN–
OUT+
OUT–
M101
(SPINDLE)
MOTOR
DRIVE
XRST
LDON
10
DSP MUTE
MOTOR
DRIVE
COIL
DRIVE
OUT–
OUT+
COIL
DRIVE
M
M
M102
(SLED)
16
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
(BD BOARD)
OPTICAL PICK-UP
(KSS-213D/Q-NP)
LDON
PD
(Page 19)
•
SIGNAL PATH
: CD PLAY
: DIGITAL OUT
I-V AMP
2
1
17
16
2
CTRL1
CTL1
CTL2
11
CTRL2
27
SUBQ DATA
36
SUBQ CLK
SCOR
37
VARI-PITCH
DOUBLE SPEED
MCLK
33.8MHz
B
(Page 19)
DATA, BCK,
LRCK, C2PO
C
(Page 20)
RESET
IC104
D+5V
TBL-L
TBL-R
M
3
6
7
2
MOTOR
DRIVE
DISC TRAY TURN MOTOR DRIVE
IC701
OUT1
OUT2
IN1
IN2
M701
(TURN MOTOR)
SYSTEM CONTROLLER
IC101 (1/3)(MAIN BOARD)
LEVEL SHIFT
Q701
DISC SENSOR
IC703
TABLE SENSOR
IC702
ROTARY
ENCODER
S811
DISC-SENS
OPEN
S801
(OPEN/CLOSE DET)
ENC1
ENC2
ENC2
ENC3
75
T-SENS 76
4
80
CLOSE
OPEN
81
79
78
2
3
60
61
LOAD-OUT
LOAD-IN
M
10
2
7
4
MOTOR
DRIVE
DISC TRAY SLIDE MOTOR DRIVE
IC801
OUT1
OUT2
FIN
RIN
M801
(SLIDE MOTOR)
63
64
Click on the first or last page to see other HTC-V5550 / MHC-V5550 / MHC-V7770AV service manuals if exist.