Sony MHC-DX8 (serv.man2) Service Manual ▷ View online
HCD-DX8
37
37
7-16. SCHEMATIC DIAGRAM – DRIVER SECTION –
• See page 42 for IC Block Diagram.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD (STOP)
no mark : CD (STOP)
(Page 29)
HCD-DX8
38
38
7-17. PRINTED WIRING BOARD – TRANS SECTION –
• See page 21 for Circuit Boards Location.
(Page 30)
(Page 30)
HCD-DX8
39
39
7-18. SCHEMATIC DIAGRAM – TRANS SECTION –
(Page 31)
(Page 31)
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
HCD-DX8
40
40
7-19. IC PIN FUNCTION DESCRIPTION
• IC401 SYSTEM CONTROLLER (M30622MAA-A60) (MAIN BOARD)
Pin No.
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
41
42
43
44
45
46
47
48
49
50
I/O
O
O
O
O
O
I
I
—
—
I
O
I
O
—
I
—
I
I
I
I
I
O
I
I
O
O
I
O
O
O
—
I
I
I
I
I
I
I
O
I
O
O
O
I
O
I
I
I
I
I
Description
Surround control signal output. Not used.
Surround control signal output. Not used.
Surround control signal output. Not used.
Data signal output for IC101 (M61504FP)
Clock signal output for IC101 (M61504FP)
Not used.
AC CUT ON (L) / OFF (H) CHECK
Connected to ground.
Connected to ground.
SUB CLOCK input. (32.768kHz)
SUB CLOCK output. (32.768kHz)
System reset input.
MAIN SYSTEM CLOCK output. (16MHz)
Connected to ground.
MAIN SYSTEM CLOCK input. (16MHz)
Power supply. (+5V)
PULL UP (EVER +5V)
WAKE UP signal input. (L)
CD Q-data request signal input.
RDS interrupt signal input. (Connected to ground)
RDS data signal input. (Connected to ground)
Tuner mute signal output.
STEREO detect signal input. L=ON, H=OF
TUNED detect signal input. L=ON, H=OFF
TUNER chip eneble output.
TUNER data output.
TUNER data input.
TUNER clock signal output.
IIC SCL output.
IIC SDA output.
Not used.
Subcode Q data input. (CD data)
Subcode Q data input. (CD clock)
Not used.
CD data input.
Not used.
CD clock input.
Not used.
Clock check signal output. (Not used)
BD condition signal input.
MODE signal input.
CD latch signal output.
CD reset signal output.
Loading motor control signal input.
Loading motor control signal output.
Tray open detect signal input.
Tray close detect signal input.
Pick-up up/down detect signal input.
CD table detect signal input.
Not used.
Pin Name
SURROUND 1
SURROUND 2
SURROUND 3
498-DATA
498-CLK
N.C
AC-CUT
GND
GND
XC IN
XC OUT
RESET
X-OUT
VSS
X-IN
VCC
NMI
WAKE_UP
SCOR
RDS-INT
RDS-DATA
ST-MUTE
STEREO
TUNED
ST-CE
ST-DOUT
ST-DIN
ST-CLK
IIC_CLK
IIC_DATA
TXDI
SQ-DATA
SQ-CLK
RST1
CD-DATA
N.C
CD-CLK
N.C
CLOCK-OUT
SENS
HOLD
XLT
XRST
LOAD-IN
LOAD-OUT
OPEN
CLOSE
UP/DOWN SW
T-SENS
TEST MODE
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
I
I
I
I
I
I
O
O
O
O
I
—
I
—
I
I
I
I
I
I
O
I
O
O
O
O
O
O
O
I
O
I
O
O
O
O
O
O
I
I
I
O
I
O
I
—
I
—
—
O
Description
Sound control signal to the satellite amplifier (TA-DX8).
Sound control signal to the satellite amplifier (TA-DX8).
Not used.
Not used.
Not used.
Not used.
A deck trigger control signal output.H=ON, L-OFF
B deck trigger control signal output.H=ON, L-OFF
Capstan motor High/Low speed control signal output.
Capstan motor REV/FWD/STOP control signal output.H=REV, L=FWD/STOP
Not used.
POWER SUPPLY (+5V)
Not used.
Ground.
Not used.
Not used.
A deck half detect signal input.
A deck play detect signal input.
B deck play detect signal input.
AMS signal input. L=ON,H=OFF
Tape deck line mute ON/OFF signal output. H=ON, L=OFF
REC/PB/PASS select signal input.
DOLBY NR ON/OFF signal output. H=ON, L=OFF
REC mute ON/OFF signal output. L=ON, H=OFF
BIAS ON/OFF signal output.H=ON, L=OFF
EQ High/Normal select signal output. H=High, L=Normal
Playback deckA/B select signal output. H=deckB, L=deckA
ALC ON/OFF signal output. L=ON, H=OFF
Tape deck relay ON/OFF signal output. H=ON, L=OFF
Not used.
STANDBY relay control signal output. (Not used)
Speaker protect signal input. L=ON, H=OFF
DBFD control signal output. H=ON, L=OFF
Line mute signal output. L=ON, H=OFF
CD-POWER ON/OFF signal output. H=ON, L=OFF
Not used.
Speaker terminal relay control signal output. H=ON, L=OFF
POWER ON/OFF signal output. H=ON, L=OFF
Booster switch input from the satellite amplifier (TA-DX8).
A deck reel pulse detect signal input.
B deck reel pulse detect signal input.
Not used.
B deck half detect signal input.
KEY (for jig) / CD adjust.
Model select signal input.
Analog ground.
Version select signal input.
Analog Reference Voltage
Analog Power Supply
Power amplifier mute ON/OFF signal output. H=ON, L=OFF
Pin Name
FREQ-B
FREQ-A
N.C
N.C
N.C
N.C
A TRIG
B TRIG
CAPM-H/L
CAPM-CONT
N.C
VCC
N.C
VSS
N.C
N.C
A HALF
A PLAY
B PLAY
AMS-IN
TC-MUTE
R/PB/PAS
NR-ON/OFF
REC-MUTE
BAIS
EQ-H/N
PB-A/B
ALC
TC-RELAY
N.C
STBY-RELAY
PROTECT
DBFB-ON/OFF
LINE-MUTE
CD-POWER
F-SHIFT
RELAY-H
POWER
BOOSTER SW
A SHUT
B SHUT
SOFT-TEST
B HALF
KEY/CD ADJ
MODEL-IN
AVSS
SPEC-IN
VREF
AVCC
STK-MUTE
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