![background image](http://html.mh-extra.com/html/sony/hcd-gnx80/hcd-gnx80_service-manual_420697056.webp)
56
HCD-GNX80
Pin No.
Pin Name
I/O
Description
50
SW LED2
O
LED drive signal output
51
B-PLAY
I
Deck B playback detection signal input
52
THERMAL VACS
I
Thermal VACS detection input
53
A-TRIG
O
Deck A side trigger plunger drive signal output
54
CAPM-CONT
O
Capstan motor drive signal output
55
B-TRIG
O
Deck B side trigger plunger drive signal output
56
REC BIAS
O
Recording bias on/off control signal output
57
TC-RELAY
O
Recording/playback selection signal output
58
ALC
O
Automatic limiter control signal output
59
PB-AB
O
Deck A/B playback selection signal output
60
AMS-IN
I
Not used.
61
UNDER VOLTAGE DET
I
Under-voltage protection detection input
62
VCC
—
Power 3.3V)
63
OVER VOLTAGE
O
Over-voltage protection detection input
64
VSS
—
Ground
65
TC MUTE/IO-EXP DATA OUT
O
Tape playback muting on/off signal output
66
LINE MUTE
O
Line muting on/off signal output
67
REC MUTE
O
Recording muting on/off signal output
68
SW RY/IO-EXP CLK
O
Sub woofer relay drive signal output
69
STBY-RLY
O
Main power on/off signal output
70
PROT
I
Speaker protect detection signal input
71
GC-RESET
O
GC reset signal output
72
STBY-LED/FAN CTRL
O
POWER indicator LED drive signal output
73
DISPLAY-KEY
I
DISPLAY key press detection Interrupt signal input
74
POWER-KEY
I
POWER key press detection Interrupt signal input
75
HP-MUTE
O
Headphone muting on/off signal output
76
FR RELAY
O
front speakers relay drive signal output
77
LINK/SURR-RLY
O
Surround speaker mode control signal output
78
STK-MUTE
O
Power amplifier and sub woofer amplifier on/off control signal output
79
M61530-DATA
O
Serial data output to M61530FP
80
M61530-CLK
O
Serial transfer clock signal output to M61530FP
81
M61529-DATA
O
Serial data output to M61529FP
82
M61529-CLK
O
Serial transfer clock signal output to M61529FP
83
SW ON LED
O
SUB WOOFER ON LED drive signal output
84
ST-CE
O
PLL chip enable signal output to the tuner unit
85
MC DIN (ST)
O
PLL serial data output to the tuner unit
86
ST-CLK
I
PLL serial transfer clock signal output to the tuner unit
87
MC DOUT (ST)
I
PLL serial data input from the tuner unit
88
TUNED
I
Tuning detection signal input from the tuner unit
89
A SHUT
I
Shut off detection signal input from deck A side reel pulse detector
90
B SHUT
I
Shut off detection signal input from deck A side reel pulse detector
91
SW AD KEY
I
Sub woofer on/off and surround speaker mode key input
92
MODEL-IN
I
Model input
93
DEST-IN
I
Destination input
94
B-HALF
I
Deck B cassette , forward side recording tab and reverse side recording tab detection signal input
95
SW VOL IN
I
Subwoofer on/off signal input
96
AVSS
—
Ground
97
BPF DET
I
Low frequency signal input from NJM2760 for RANDOM mode
98
VREF
I
A/D reference voltage input
99
AVCC
—
Power supply (+3.3V)
100
HP DET
I
Headphone connection detection signal input