Sony MHC-VX888 (serv.man2) Service Manual ▷ View online
HCD-VX888
26
26
6-4.
BLOCK DIAGRAM – VIDEO CD Section –
78
76
73
64
11
3
4
5
6
SPEANA
BPF
FUNCTION
KEY
S768 – 781
IC602
65
55
57
54
56
58
FUNCTION
KEY
S753 – 767
LED
DRIVER
S601 – 605
D608, 609
D612 – 618
66
FUNCTION
KEY
ROTARY
ENCODER
S601 – 606
S791 – 795
S791 – 795
80
79
VOLUME
S751
PAUSE REC/START
D751
X601
4MHz
83
82
FLOURESCENT
INDICATOR TUBE
DISPLAY CONTROLLER,
LED DRIVE
IC601
FL601
F1
F2
59
74
75
52
LED
DRIVER
S791 – 793
D791 – 793
LED
DRIVER
Q751
ENTER
D752
53
48
LED
DRIVER
Q752
–VG
HEADPHONE
VIDEO
SWITCH
SWITCH
ALL BAND
KEY0
KEY1
KEY2
VOL A
VOL B
XIN
XOUT
60 IIC DATA
61 IIC CLOCK
77 RESET
5
ı
1
ı
93
100
17
ı
12
BPF 0
ı
BPF 5
G1
ı
G13
P1
ı
P39
71
ı
67
72
72
6
ı
10
12
12
ı
22
24
24
ı
41
43
43
ı
47
TUNER
CD
TAPE A/B
MD/VIDEO
GAME IN
DISC1
DISC2
DISC3
REC/PAUSE
ENTER
VKK
H
L
K
MAIN SECTION
(Page 24)
MAIN SECTION
(Page 24)
MAIN SECTION
(Page 24)
J
MAIN SECTION
(Page 24)
D
TUNER/CD SECTION
(Page 23)
I
MAIN SECTION
(Page 24)
F
VIDEO CD SECTION
(Page 25)
6
IC722 (2/2)
7
3
IC722 (1/2)
1
DIGITAL
ECHO AMP
IC721
2
9
LPFIN
LPF2
OUT
MIC 2
J721
MIC 1
J722
41
29
30
–V
REG
D543
Q941
D977
D822
D824
D910
D911
F1
F2
D541
D901 – 904
120
S901
D906 – 909
D972 – 975
(EXCEPT E91)
(E91)
JW973
JW974
(EXCEPT E91)
(EXCEPT E91)
(EXCEPT IA)
AC IN
F971
220
230 – 240
120
220
230 – 240
AC OUT
TO
SATLLITE
AMPLIFIER
(TA-DX80)
VOLTAGE SELECTOR
+VH
–VG
(–32.2V)
–VH
+VL
–VL
POWER
AMP
(IC501)
T910
POWER
TRANSFORMER
T972
POWER
TRANSFORMER
+12V
REG
IC921
3
1
CD POWER
SWITCH
Q911, 912
+5V
REG
IC911
3
1
+5V
REG
IC951
3
1
+9V
REG
IC961
3
1
+5.7V
REG
IC971
EVER +5.7V
RY971
RY972
3
1
B+
(+13.9V)
(RY801)
A+12V
ST A+12V
MIC A+12V
TC A+12V
TC D+5V
+3.3V
VREF (IC501)
D +5V
VCC (IC501)
TC M+9V
CDM M+7V
LED +7V
AUDIO +5V
CD A+5V (SW)
CD D+5V (SW)
D952
D953
D509
D510
D920 – 922
D577
D579
D580
D508
D511
RESET SIGNAL
GENERATOR
IC502
Q575
3
1
12
43
100
(EXCEPT E91)
JW990
84
4
10
X501
32.768kHz
11
38
RELAY
DRIVE
Q971
+3.3V
REG
IC616
3
1
REMOTE
CONTROL
RECEIVER
IC603
15
X502
16MHz
13
M RESET
IIC CLK
IIC DATA
RESET
AC CUT
STBY RELAY
SIRCS
CD POWER
SYSTEM CONTROLLER
IC501 (3/3)
XC IN XC OUT
X IN
X OUT
XRST
(E91)
JW986
STBY +5V
HEADPHONE SW
VIDEO SWITCH
SPEANA
MIC SIG
XRST
IIC DATA
IIC CLOCK
PROTECT
MOTOR B+
E3: 240V AC Area in Emodel
E91: 220V AC Area in Emodel
EA: Saudi Arabia model
SP 2/6: Singapore model
IA: Indonesia model
E91: 220V AC Area in Emodel
EA: Saudi Arabia model
SP 2/6: Singapore model
IA: Indonesia model
• Abbreviation
JW972
HCD-VX888
27
27
6-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
• indication of transistor.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
c
: digital out
I
: VIDEO
• Abbreviation
E3
: 240 V AC Area in E model
E91
: 220 V AC Area in E model
EA
: Saudi Arabia model
IA
: Indonesia model
SP2/6 : Malaysia, Singapore model
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Circuit Boards Location
MOTOR board
ADDRESS SENSOR board
DRIVER board
MAIN TRANS board
VIDEO SWITCH board
SENSOR board (E91, IA)
BD board
SUB TRANS board
MAIN board
POWER AMPLIFIER board
LEAF SW board
HEAD (A) board
HEAD (B) board
PANEL board
CD-SW board
PAD SWITCH board
VIDEO board
HCD-VX888
28
28
6-6.
SCHEMATIC DIAGRAM – BD Board –
•
See page 50 for Waveforms.
•
See page 51 for IC Block Diagrams.
IC 106
VIDEO
BOARD (1/3)
CN501
(Page 44)
29
29
HCD-VX888
6-7.
PRINTED WIRING BOARD – BD Board –
•
See page 27 for Circuit Boards Location.
There are a few cases that the part printed on
this diagram isn’t mounted in this model.
this diagram isn’t mounted in this model.
• Semiconductor
Location
Ref. No.
Location
D101
D-2
IC101
C-2
IC102
A-3
IC103
C-1
IC106
D-3
Q101
C-1
Q103
D-3
IC101
IC104
IC103
IC106
IC102
VIDE0
BOARD
CN501
(A-MAX.3)
25
N
(Page 47)
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