Read Sony CHC-TB10 / CHC-TB20 / HCD-TB20 Service Manual online
51
HCD-TB20
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 to 80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
O
I
I
O
–
I
I
O
O
O
–
–
O
–
O
O
O
O
I
I
I
I
I
I
–
I
I
–
O
O
O
O
O
I
O
O
–
I
I
I
I
I
I
–
I
–
–
–
Pin Name
BACK LIGHT
VOL B
VOL A
LDON
NC
SENS
TUNED
TC TRG
CAPM CONT
XRST
NC
VCC
SOFT TEST
VSS
CD POWER
CD MUTE
LOAD OUT
LOAD IN
OPEN
CLOSE
T SENS1
T SENS2
DISPLAY KEY
POWER KEY
NC
T SENS3
DISC SENS
NC
LINE MUTE
STAND BY RELAY
FAN CONT
STK POWER
FRONT RELAY
PROTECT
AMP DATA
AMP CLK
(VCD DET)
TC SHUT
TC HALF/REC
MODEL IN
SPEC IN
KEY3
KEY2
AVSS
KEY1
VREF
AVCC
NC
Description
Back light LED control signal output
Volume signal input from the rotary encoder
Volume signal input from the rotary encoder
LDON signal output to IC103(CXA2581N)
Not used (open)
SENS signal input from IC101(CXD3017Q)
TUNED detect signal input (L=ON,H=OFF)
Tape deck trigger control signal output (H=ON,L=OFF)
Capstan motor control signal output (H=REV,L=FWD,L=STOP)
CD reset signal output
Not used
Power supply (+3.3V)
Test point (soft check out)
Ground
CD power control signal output (H=ON,L=OFF)
CD muting control signal output
Loading motor control signal output
Loading motor control signal output
Tray open detect signal input
Tray close detect signal input
CD table detect signal input
CD table detect signal input
DISPLAY key detect signal input
Power key detect signal input
Not used
CD table detect signal input
Disc detect signal input
Not used
Line muting control signal output (H=ON,L=OFF)
Standby relay control signal output
Fan motor control signal output (not used)
Power amplifier control signal output (H=ON,L=OFF)
Front speaker relay control signal output (H=ON,L=OFF)
Speaker protect signal input (L=ON,H=OFF)
Data output to the sound processor
Clock output to the sound processor
Not used
Tape deck reel pulse signal input
Tape deck half detect signal input
Model input terminal
Version select input terminal
Key input signal from the function key
Key input signal from the function key
Analog ground
Key input signal from the function key
Analog reference voltage
Analog power supply
Not used
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