Sony HCD-GX750 Service Manual page 25

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• IC601 LC876996A-53H2-E (SYSTEM CONTROLLER) (PANEL BOARD)
Pin No.
1
2 O-MP3 LP MOTER
3 I-MP3 ACK SOL-B
4 O-MP3 REQ SOL-A
5
6 O-MP3 RESET
7 I-BU1924 DATA
8 I-BU1924 CLK
9 I-VOLUME-IN1
10 I-VOLUME-IN2
11
12
13
14
15
16
17
18 I-PROTECT
19 WFR/HP/MIC-IN
20 I-CD ENCODER
21 I-CD OPEN/CLOSE
22 I-TAPE A START
23 I-TAPE B START
TE
L 13942296513
24 I-STREAM/VACS
25
26
27
28
29
30 to 42
43 to 45
46
47 to 49
50 S7/METER-SW1
51
52 S8/METER-SW2
53 S9/METER-SW3
54 to 63 S10/SW1 to S19/SW10
64, 65
66 I-SPEC/MODEL/METER
67 I-TUNED-IN
68 I-STEREO-IN
69
70 I-REEL-A-IN
71 I-REEL-B-IN
72
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73 I-CD NUM SENSOR
74 O-POWER-RELAY
75 O-SYSTEM-MUTE
.
76 O-POWER-LED
77 STREAM-LED6/SOL B
78 STREAM-LED5/SOL A
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Pin Name I/O
O-MP3 CS O CS signal output to CD digital processor
O LP signal output to CD digital processor and motor signal output
I ACK signal input from CD digital processor and motor signal input
O REQ signal output to CD digital processor and motor signal output
I-SCOR I CD scor signal input
O RESET signal output to CD digital processor
I Data signal input Connect to ground in this set.
I Clock signal input
I Volume signal input from the encoder
I Volume signal input from the encoder
RESET I Reset signal input
I-XT1 I Connection for input a crystal resonator (32.768 kHz)
I-XT2 O Connection for input a crystal resonator (32.768 kHz)
VSS1 — Ground pin
CF1 I Connection for input a ceramic resonator (10 MHz)
CF2 O Connection for input a ceramic resonator (10 MHz)
VDD1 — Power supply pin (+1.5 V)
I Power amplifier circuit protection signal input
I SubWoofer or Headphone detection signal input
I Signal input from the CD encoder
I CD tray open switch signal input
I TAPE A switches signal input
I TAPE B switches signal input
I Stream/Vacs signal input
I-KEY 3 I Function key input 3
I-KEY 2 I Function key input 2
I-KEY 1 I Function key input 1
I-SIRDS-IN I Data signal input from the remote contorol receiver
I-AC CUT I Power down signal input
G13 to G1 O FL tube grid signal output
S1 to S3 O FL tube segment signal output
VDD3 — Power supply pin (+3.3 V)
S4 to S6 O FL tube segment signal output
O FL tube segment signal output
–VPP — Power supply (–) pin (–26 V)
O FL tube segment signal output
O FL tube segment signal output
O FL tube segment signal output
S20, S21 O FL tube segment signal output
I METER swich signal input
I Tuning frequency signal input
I Stereo tuning signal input
I-AMS-IN I AMS signal input
I A deck photo sensor signal input
I B deck photo sensor signal input
VDD4 — Power supply pin (+3.3 V)
I Table address sensor swich signal input
x ao
O POWER RELAY control signal output
y
O System muting signal output
i
O POWER LED control signal output
O Illumination LED control signal output
O Illumination LED control signal output
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HCD-GX750/RG551/RX550
2 9 9 4 2 8
Pin Description
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9
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