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Model
MHC-VX888 (serv.man2)
Pages
83
Size
12.49 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mhc-vx888-sm2.pdf
Date

Sony MHC-VX888 (serv.man2) Service Manual ▷ View online

57
HCD-VX888
Pin No.
Pin Name
I/O
Description
84
STBY-RELAY
O
Standby relay on/off control signal output to the RY971    “H”: relay on
85
REAR-RELAY
O
Rear speaker relay on/off control signal output to the STA. AMP (TA-DX80)    “H”: relay on
86
SURR-RELAY
O
Surround speaker relay on/off control signal output terminal    “H”: relay on    Not used (open)
87
FRONT-RELAY
O
Front speaker relay on/off control signal output to the RY801    “H”: relay on
88
PROTECT
I
Speaker protect signal input terminal    “L”: protect on
89
A-SHUT
I
Shut off detection signal input from the deck-A side reel pulse detector
90
B-SHUT
I
Shut off detection signal input from the deck-B side reel pulse detector
91
B-HALF
I
Detection input from the deck-B half detect switch    “L”: cassette in, “H”: no cassette
92
MODEL-IN
I
Model select signal input terminal
93
SPEC-IN
I
Version select signal input terminal
94
FREQ-B
O
Frequency control signal output to the Booster AMP (TA-DX80)
95
FREQ-A
O
Frequency control signal output to the Booster AMP (TA-DX80)
96
AVSS
Ground terminal (for analog)
97
BOOSTER-SW
I
Booster encoder signal input from the satellite AMP (TA-DX80)
98
VREF
Analog reference voltage terminal
99
AVCC
Power supply terminal (+5V) (for analog)
100
AC CUT
I
AC power off detection signal input from the reset signal generator (IC502)
58
HCD-VX888
 PANEL BOARD  IC601  MB90M407PF-G-107-BND (DISPLAY CONTROL)
Pin No.
Pin Name
I/O
Description
1 to 5
G5 to G1
O
FL grid drive signal output
6 to 10
P1 to P5
O
FL segment drive signal output
11
VSS IO
Ground terminal (VSS for I/O)
12 to 22
P6 to P16
O
FL segment drive signal output
23
XDD-FIP
Power supply terminal (+3.3V) (VDD for FL Tube)
24 to 41
P17 to P34
O
FL segment drive signal output
42
VSS IO
Ground terminal (VSS for I/O)
43 to 47
P35 to P39
O
FL segment drive signal output
48
VKK
–32V driving power for FL
49
MD0
I
Micom operating mode terminal (fixed at “H”)
50
MD1/VDD-VFT
I
Micom operating mode terminal (fixed at “H”)
51
MD2
Micom operating mode terminal (fixed at “L”)
52
REC/PAUSE LED
O
REC PAUSE/START LED on/off control signal output terminal     “H”: LED on, “L”: LED off 
53
ENTER LED
O
ENTER LED on/off control signal output terminal     “H”: LED on, “L”: LED off 
54
TAPE A/B LED
O
TAPE A/B LED on/off control signal output terminal     “H”: LED on, “L”: LED off
55
TUNER LED
O
TUNER/BAND LED on/off control signal output terminal     “H”: LED on, “L”: LED off
56
MD/VIDEO LED
O
MD (VIDEO) LED on/off control signal output terminal     “H”: LED on, “L”: LED off
57
CD/VCD LED
O
CD LED on/off control signal output terminal     “H”: LED on, “L”: LED off
58
GAME IN LED
O
GAME LED on/off control signal output terminal     “H”: LED on, “L”: LED off
59
DISC 1 LED
O
DISC 1 LED on/off control signal output terminal     “H”: LED on, “L”: LED off
60
IIC DATA
I/O
Data input/output terminal for the IIC bus
61
IIC CLOCK
I/O
Shift clock signal input/output terminal for the IIC bus
62
AVCC
Power supply terminal (+3.3V) (for A/D)
63
AVSS
Ground terminal (for A/D)
64
KEY0
I
Key input terminal (A/D input)
S768 to S781 (PLAY MODE, REPEAT, EDIT, MUSIC EQ, MOVIE EQ, v, ENTER, V,
P FILE, GROOVE, SURROUND, g G, X, M keys input)
65
KEY1
I
Key input terminal (A/D input)    S752 to S767 (DISPLAY, B, b, SPECTRUM, EFECT on/off, 
GAME EQ, KARAOKE PON, PICTURE EFECT, m–, ., x, CD SYNC HI-DUB, REC 
PAUSE/START, M+, REW, FF keys input)
66
KEY2
I
KEY input terminal (A/D input)    S791 to S796
(Z OPEN/CLOSE (CD), DISC SKIP/EX-CHANGE, DISC3, DISC2, DISC1, I/1 keys input)
67 to 70
BPF4 to 1
I
Band-pass filter input from the BA3830F (IC602)
71
SUPER LOW 
FREQUENCY
(BPF0)
I
Band-pass filter input from the BA3830F (IC602)
72
BPF5
I
Band-pass filter input from the BA3830F (IC602)
73
ALL BAND
I
All band (L+R) Band-pass filter input from the BA3830F (IC602)
74
DISC 2 LED
O
DISC 2 LED on/off control signal output terminal    “H”: LED on, “L”: LED off 
75
DISC 3 LED
O
DISC 3 LED on/off control signal output terminal    “H”: LED on, “L”: LED off 
76
VIDEO SWITCH
O
VIDEO/GAME selection signal output terminal    Not used (open)    “H”: VIDEO
77
RESET
I
Reset signal input from the system control (IC501)
78
HEADPHONE
I
Headphone detect signal input terminal    “H”: Headphone Yes, “L”: Headphone No 
79
VOL 1B
I
Jog dial pulse input from the rotary encoder (IC751 VOLUME)    B phase input
80
VOL 1A
I
Jog dial pulse input from the rotary encoder (IC751 VOLUME)    A phase input
81
VSS-CPU
Ground terminal (+3.3V) (VSS for CPU)
59
HCD-VX888
Pin No.
Pin Name
I/O
Description
82
XOUT
O
System clock output terminal (4MHz)
83
XIN
I
System clock input terminal (4MHz)
84
VCC-CPU
Power supply terminal (+3.3V) (VCC for CPU)
85 to 91
NO USE
I
Not used (open)
92
SOFT TEST
O
Soft test terminal    Not used (open)
93 to 100
G13 to G6
O
FL grid drive signal output
60
HCD-VX888
7-1. CABINET  SECTION
SECTION  7
EXPLODED  VIEWS
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Accessories and packing materials are given
in the last of the electrical parts list.
• Hardware (# mark) list is given in the last of
the electrical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Parts Color Cabinet's Color
• 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
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
CDM58E-30BD61A
#1
#1
#1
#1
#1
#1
E91, IA
#1
not
supplied
#1
#2
#1
#1
#1
#1
#1
#1
#1
#1
4
3
5
2
2
2
2
6
Front Panel section
Main board section
M961
1
8
17
13
9
10
12
11
15
14
16
not
supplied
not
supplied
1
4-225-252-01 CUSHION (FOOT)
2
3-363-099-41 SCREW (CASE 3 TP2)
3
4-225-038-22 SIDE PANEL (L) (EXCEPT IA)
3
4-225-038-32 SIDE PANEL (L) (IA)
4
4-231-563-51 LOADING PANEL (EXCEPT E91)
4
4-231-563-91 LOADING PANEL (E91)
5
4-225-039-72 SIDE PANEL (R) (EXCEPT IA)
5
4-225-039-82 SIDE PANEL (R) (IA)
6
4-224-550-01 CASE (TOP) (IA)
6
4-224-550-41 CASE (TOP) (EXCEPT IA)
8
4-232-028-21 BACK PANEL (EXCEPT E91)
8
4-232-028-41 BACK PANEL (E91)
9
1-681-143-11 SENSOR BOARD (E91, IA)
10
1-680-892-11 VIDEO SWITCH BOARD
11
4-233-148-01 GROUND PLATE
12
A-4476-114-A SUB TRANS BOARD, COMPLETE
(E3, EA, SP2/6)
12
A-4476-773-A SUB TRANS BOARD, COMPLETE (IA)
12
A-4725-809-A SUB TRANS BOARD, COMPLETE (E91)
0 13
1-757-852-11 CORD, CONNECTION
14
A-4725-689-A VIDEO BOARD, COMPLETE (EA, SP2/6, E3)
14
A-4725-691-A VIDEO BOARD, COMPLETE (IA)
14
A-4725-771-A VIDEO BOARD, COMPLETE (E91)
15
1-690-589-31 WIRE (FLAT TYPE) (13 CORE) (EXCEPT E91)
15
1-769-987-11 WIRE (FLAT TYPE) (13 CORE) (E91)
16
1-757-421-11 WIRE (FLAT TYPE) (25 CORE)
17
3-703-571-11 BUSHING (S) (4516), CORD (E3)
17
4-966-266-01 BUSHING (S) (FBS002), CORD (IA)
17
3-703-244-00 BUSHING (2104), CORD (EA, SP2/6, E91)
M961
1-763-072-11 FAN, D.C.
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