Sony HCD-GTR6 Service Manual page 65

53 AUDIO IC CLOCK
54 AD SUPPLY CUT OFF
55 MTK POWER CONTROL
56 FAN ON
57 NO USE
58 ST-TUNED
59 NO USE
60 ST-CE
61 ST-DOUT (UC_DIN)
62 VCC
63 ST-DIN (UC_DOUT)
64 VSS
65 ST-CLK
66 MTK 3.3V MONITOR
67 THERMA VACS
68 STBY RELAY
69 OVER VOLTAGE DET
70 VACS-IN
71 METER LEVEL IN
72 REC BIAS
73 POWER KEY
74 NO USE
75 REC MUTE
76 MIC DET
77 HP DET
78 CAPM-CNT
79 B-TRIG
80 B SHUT
81 B-HALF/REC
82 TC-RELAY
83 METER IN2
84 METER IN1
85 METER IN3
86 METER IN4
87 METER SW
88 AD-KEY-1
89 AD-KEY-0
90 AD-KEY-2
91 MODEL-IN
92 DEST-IN
93 OPERATION DIAL
94 MASTER VOLUME
95 EEPROM CLOCK
96 AVSS
97 EEPROM DATA
98 VREF
99 AVCC
100 METER-BLUE
HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B
O Serial data transfer clock signal output to audio signal IC, R2A15216FP
O Micom AD Vcc supply cut off
I MTK IC Power control
O Fan on/off control port.
O Unused port (Output port setting - open)
I "TUNED" input signal from Tuner pack.
O Unused port (Output port setting - open)
O PLL chip enable signal output to the tuner unit
O PLL serial data output from the tuner unit
– Power supply terminal (+3.3V)
I PLL serial data input to the tuner unit
– Ground terminal
O PLL serial data transfer clock signal output to the tuner unit
I Micom monitoring the MTK power supply pin.
I Temperature detection signal input from thermistor (A/D input)
O Main power on/off control signal output "H":power on
I Over-voltage protection detection input terminal "L": over-voltage detected
I Spectrum analyzer drive signal input from Audio IC signal (A/D input)
I Audio signal level for Meter level detect (A/D input).
O Recording bias on/off control signal output "H":bias on
I POWER key and DISPLAY key press detection signal (Interrupt input)
O Unused port (Output port setting - open)
O Recording muting on/off control signal output "L":muting on
I Mic in detect pin.
I Heahphone in detect pin.
O Capstan motor drive signal output
O Deck side trigger plunger drive signal output "H":plunger on
I Shut off detection signal input from deck A side reel pulse detector (A/D input)
Deck B cassette detection, forward side recording tab detection and reverse side recording
I
tab detection signal input terminal (A/D input)
O Recording/playback selection signal output "H":recording "L":playback
O Meter motor control port
O Meter motor control port
O Meter motor control port
O Meter motor control port
I Meter position switch (Initial & End Position) for calibration purpose.
I Key input terminal for AD key line 1.
I Key input terminal for AD key line 0.
I Key input terminal for AD key line 2.
I Model setting terminal (A/D input)
I Destination setting terminal (A/D input)
I Jog dial pulse input from OPERATION DIAL encoder
I Jog dial pulse input from the VOLUME encoder
I/O External EEPROM memory backup (Serial Clock line)
I Ground terminal (for A/D conversion)
I/O External EEPROM memory backup (Serial Data line)
I A/D Converter reference voltage input terminal (+3.3V)
– Power supply terminal (+3.3V) (for A/D conversion)
O LED drive signal output of Meter backlight LED
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