Sony MHC-VX888 (serv.man2) Service Manual ▷ View online
49
49
HCD-VX888
6-31. PRINTED WIRING BOARDS – MAIN TRANS/SUB TRANS 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.
4
1
L
POWER AMPLIFIER BOARD
NO501
1-680-265-
11
(12)
T910
POWER TRANS FORMER
(E91)
(EXCEPT E91)
SUB TRANS BOARD
MAIN TRANS BOARD
AC IN
(E91)
VOLTAGE SELECTOR
S901
230–240V
220V
120V
(EXCEPT E91)
(EXCEPT E91)
(E91)
T972
POWER TRANSFORMER
1
3
3
1
E
M
POWER AMPLIFIER
BOARD
CN504
1-680-266-
11
(12)
TO
SATELLITE AMPLIFIER
(TA-DX80)
(EXCEPT E91)
(EXCEPT E91)
*
*
NOT REPLACEABLE :
BILT IN TRANSFORMER
4
1
(EXCEPT E91)
–2
–1
B
C
D
E
F
G
H
A
1
2
3
4
5
6
7
8
D971
E-6
D972
F-7
D973
F-7
D974
F-7
D975
F-7
D977
F-1
IC971
F-8
Q971
G-8
• Semiconductor
Location
Ref. No.
Location
(Page 37)
(Page 37)
50
50
HCD-VX888
• Waveforms
– BD Board –
– BD Board –
1
IC101
t;
(RFAC) (CD Play mode)
6
IC601
is
(X OUT) (Stop mode)
1.3 Vp-p
– PANEL Board –
3.5 Vp-p
4 MHz
– MAIN Board –
2
IC501
qa
(XC OUT) (Stop mode)
3.1 Vp-p
32.768 kHz
2
IC101
ra
(TE) (CD Play mode)
Approx.
0.5 Vp-p
0.5 Vp-p
3
IC501
qd
(X OUT) (Stop mode)
3.8 Vp-p
16 MHz
3
IC101
el
(FE) (CD Play mode)
Approx.
0.4 Vp-p
0.4 Vp-p
1
IC51
ws
(X OUT) (TUNER (FM))
4.3 Vp-p
4.5 MHz
4
T301
4
(DECK-B REC mode)
128 Vp-p
80 kHz
5
NO303
3
(L-REC),
6
(R-REC)
(DECK-B REC mode)
52 Vp-p
80 kHz
4
IC101
wh
(MDP)
2.3 Vp-p
7.5
µ
s
– VIDEO Board –
1
IC502
qd
(XOUT)
qa
J301
4
(YOUT)
6
IC505
<z/,>
(DA-LRCK)
2
IC505
ih
(DA-XCLK)
7
IC505
<zzz>
(DA-BCK)
3
IC505
od
(VSYNC)
0
IC509
4
(MCKO)
9
IC509
wf
(XT2)
8
IC509
w;
(384FSO)
4
IC505
<z/z>
(HSYNC)
4.6 Vp-p
10 MHz
3.6 Vp-p
17 MHz
3.5 Vp-p
20 ms
3.2 Vp-p
64
µ
s
5
IC505
<z/n>
(VCK-IN)
5.4 Vp-p
37 nsec
4.5 Vp-p
22.7
µ
s
4.5 Vp-p
472 ns
2.0 Vp-p
37 ns
2.0 Vp-p
H
qs
J301 (COUT)
H
2.0 Vp-p
qd
CN301
2
(VIDEO OUT)
1.3 Vp-p
H
5.2 Vp-p
37 us
5.0 Vp-p
59 ns
51
HCD-VX888
• IC Block Diagrams
– BD Board –
IC101
CXD3068Q
DOUT
LRCK
PCMD
BCK
DVDD2
ASYE
MD2
EMPH
XTSL
DVSS2
XTAI
XTAO
SQSO
SQCK
SCSY
SBSO
EXCK
SOUT
SOCK
XOLT
SE
TE
VC
TES1
TEST1
DVSS1
FRDR
FFDR
TRDR
TFDR
SRDR
SFDR
DVDD1
FSTO
SSTP
MDP
LOCK
PWMI
FOK
DFCT
DIGITAL
CLV
PROCESSOR
OSC
DIGITAL
OUT
EFM
DEMODULATOR
32K
RAM
ERROR
CORRECTOR
D/A DIGITAL
INTERFACE
MIRR, DFCT,
FOK
DETECTOR
CPU
INTERFACE
SUBCODE
PROCESSOR
SERVO
AUTO
SEQUENCER
SERVO INTERFACE
DVDD0
XRST
MUTE
D
ATA
XLA
T
CLOK
SENS
SCLK
A
TSK
WFCK
XUGF
XPCK
GFS
C2PO
SCOR
C4M
WDCK
DVSS0
COUT
MIRR
A
VDD0
IGEN
A
VSS0
ADIO
RFDC
CE
TE
A
VSS1
RF
AC
ASYI
ASYO
BIAS
A
VDD1
PCO
FILI
FILO
CL
TV
V16M
VCTL
VPCO
59 58
57 56 55 54 53 52
51 50 49 48
47 46 45 44 43 42 41
1
2
3
4
5
6
7
8 9 10 11 12 13 14 15 16 17 18 19 20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
OPERA
TIONAL
AMPLIFIER &
ANALOG SWITCH
A/D
CONVER
TER
FOCUS
PWM
GENERATOR
TRACKING
PWM
GENERATOR
SLED
PWM
PWM
GENERATOR
FOCUS
SERVO
SERVO
DSP
TRACKING
SERVO
DSP
SLED
SERVO
DSP
ASYMMETRY
CORRECTOR
DIGITAL
PLL
CLOCK
GENERATOR
60
52
HCD-VX888
IC103
CXA2581N-T4
RW/ROM
RW/ROM
EQ ON/OFF
VOFST
VOFST
DVC
VC
VC
VC
RW/ROM
VC
DVC
30
29
28
+
–
+
–
DVC
VCC
DVC
27
26
25
24
RW/ROM
EQ
23
22
21
20
19
RFAC
VCA
VCC
+
–
DVC
+
–
+
–
RW/ROM
VC
RW/ROM
DVC
+
–
3
A
B
C
D
B
C
C
A
A
A
B
C
C
D
B
C D
D
+
–
1
2
APC AMP
5
6
7
8
9
4
RFAC
SUMMING
AMP
RW/ROM
APC-OFF
(Hi-Z)
RW/ROM
(H/L)
VOFST
VC
RW/ROM
+
–
10
11
GM
GM
18
17
16
B
D
A
C
13
14
15
12
EQ IN
LD
PD
GND
A
B
C
D
AC SUM
E
F
DVCC
DVC
RFAC
SW
DC OFST
RFDCI
RFDCO
VC
RFC
VFC
BST
RFG
VCC
CEI
CE
TE BAL
TE
FEI
FE
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