Read Sony HCD-GTX88 / HCD-GTX88BP Service Manual online
73
HCD-GTX88/GTX88BP
Pin No.
Pin Name
I/O
Pin Description
49
LMR
O
CD mechanism loading motor control signal output
50
STBY RELAY
O
Main power on/off control signal output “H”: power on
51
ATRIG
O
Deck A side trigger plunger drive signal output “H”: plunger on
52
A HALF
I
Deck A cassette detection signal input “H”: cassette detected
53
CAPM+
O
Capstan motor drive signal output
54
B TRIG
O
Deck B side trigger plunger drive signal output “H”: plunger on
55
REC BIAS
O
Recording bias on/off control signal output “H”: bias on
56
TC RELAY
O
Recording/playback selection signal output “H”: recording, “L”: playback
57
PB A/B
O
Deck A/B playback selection signal output “H”: Deck A, “L”: Deck B
58
ALC
O
Automatic limiter control signal output “H”: limiter ON
59
REC MUTE
O
Recording muting on/off control signal output “L”: muting on
60
TC MUTE
O
Tape playback muting on/off control signal output “H”: muting on
61
UNDER VOLTAGE DET
I
Under-voltage protection detection signal input “H”: under-voltage detected
62
VCC
—
Power supply pin (+3.3 V)
63
OVER VOLTAGE DET
I
Over-voltage protection detection signal input “L”: over-voltage detected
64
VSS
—
Ground pin
65
CD USB MUTE
O
CD and USB analog muting on/off control signal output “L”: muting on
66
LINE MUTE
O
Line muting on/off control signal output “L”: muting on
67
STK MUTE
O
Power amplifier and sub woofer amplifier on/off control signal output
“H”: amplifier on
68
HP MUTE
O
Headphone muting on/off control signal output “L”: muting on
69
PROTECTOR
I
Speaker protect detection signal input from speaker protect circuit “L”: protector on
70
FRONT RELAY
O
Relay drive signal output for the front speakers “H”: relay on
71
LINK RELAY
O
Surround speaker mode control signal output “H”: link, ”L”: matrix surround 1/2
72
SW SPK RELAY
O
Relay drive signal output for the passive sub woofer output “H”: relay on
73
DISPLAY KEY
I
DISPLAY key press detection signal input (Interrupt input)
74
POWER KEY
I
POWER key press detection signal input (Interrupt input)
75
Z GROOVE FREQ
O
Selector port to turn the Z-groove frequency response circuity
76
NO USE
I
Not used in this set. (Connected to ground.)
77
CTRL 3
O
Effector circuity mode control 3 signal output “H”: Chorus/Effector Off,
“L”: Flanger/Delay.
78
CTRL 1
O
Effector circuity mode control 1 signal output “H”: Delay/Effector Off,
“H”: Flanger/Chorus.
79
M61530 DATA
O
Serial data signal output to 4-ch volume IC
80
M61530 CLK
O
Serial data transfer clock signal output to 4-ch volume IC
81
M61529 DATA
O
Serial data signal output to audio signal processor
82
M61529 CLK
O
Serial data transfer clock signal output to audio signal processor
83
NO USE
I
Not used in this set. (Connected to ground.)
84
ST CE
O
PLL chip enable signal output to the tuner unit
85
ST DIN/MC DOUT
I
PLL serial data signal input from the tuner unit
86
ST CLK
O
PLL serial data transfer clock signal output to the tuner unit
87
ST DOUT/MC DIN
O
PLL serial data signal output to the tuner unit
88
FAN HI SPEED
O
Fan high speed control signal output for Themal VACS “L”: Fan high speed on.
89
A SHUT
I
Shut off detection signal input from deck A side reel pulse detector (A/D input)
90
B SHUT
I
Shut off detection signal input from deck A side reel pulse detector (A/D input)
91
B HALF
I
Deck B cassette detection, forward side recording tab detection and reverse side
recording tab detection signal input (A/D input)
92
MODEL IN
I
Model setting pin (A/D input)
93
DEST IN
I
Destination setting pin (A/D input)
94
THERMA VACS
I
Temperature detection signal input from thermistor (A/D input)
95
SW VOL IN
I
Subwoofer volume level detection signal input from subwoofer volume jog
(A/D input)
96
AVSS
I
Ground pin (for A/D conversion)
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