Sony HCD-GRX9900, Руководство по обслуживанию

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7-27. IC PIN FUNCTION DESCRIPTION
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MAIN BOARD IC501 M30622MA-A07FP (SYSTEM CONTROLLER (CD MECHANISM CONTROL))
Pin No. Pin Name I/O Description
1 STK-MUTE O
Power amplifier on/off selection signal output terminal “L”: standby mode, “H”: on
2 POWER O
Power on/off control signal output for the audio system (+5V) and deck, panel, audio system
(+7V) “L”: standby mode, “H”: power on
3 F-RELAY O
Relay drive signal output for the speaker protect “H”: relay on
4 R-RELAY O
Relay drive signal output for the speaker protect “H”: relay on Not used (open)
5 CD-POWER O
Power on/off control signal output for the CD mechanism deck section
“L”: standby mode, “H”: power on
6 LINE-MUTE O
Line muting on/off control signal output terminal “L”: muting on
7 DBFB-H/L O
DBFB normal/high selection signal output to the M62493FP (IC101)
“L”: DBFB high, “H”: DBFB low
8
BYTE
I
External data bus line byte selection signal input terminal Fixed at “L” in this set
9 CNVSS —
Ground terminal
10 XC-IN I
Sub system clock input terminal (32.768 kHz)
11 XC-OUT O
Sub system clock output terminal (32.768 kHz)
12 RESET I
System reset signal input from the reset signal generator (IC502) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
13 X-OUT O
Main system clock output terminal (16 MHz)
14 VSS —
Ground terminal
15 X-IN I
Main system clock input terminal (16 MHz)
16 VCC —
Power supply terminal (+5V)
17
NMI
I
Non-maskable interrupt input terminal Fixed at “H” in this set
18 WAKE UP I
Wakeup control signal input from the fluorescent indicator tube driver (IC601) “H” active
19 SCOR
I Subcode sync (S0+S1) detection signal input from the CXD2587Q (IC101) on the CD block
20 RDS-INT I
RDS serial data transfer clock signal input from the FM/AM tuner unit (Used for the AEP, UK,
German and North European models only)
21 RDS-DATA I
RDS serial data input from the FM/AM tuner unit (Used for the AEP, UK, German and North
European models only)
22 AC-CUT I
AC off detection signal input from the reset signal generator (IC502) “L”: AC cut checked
23 PL-CLK O
Serial data transfer clock signal output to the pro-logic circuit Not used (open)
24 PL-DATA O
Serial data output to the pro-logic circuit Not used (open)
25 PL-LAT O
Serial data latch pulse output to the pro-logic circuit Not used (open)
26 TIMER LED O
LED drive signal output of the TIMER SELECT indicator (D636) “H”: LED on
27 PROTECTOR I
Protect on/off detection signal input from the speaker protect circuit
“L”: protect on, “H”: protect off
28
V MUTE
O
Muting on/off control signal output terminal “L”: muting off Not used (open)
29 IIC-CLK I/O
Communication data reading clock signal input or transfer clock signal output with the fluo-
rescent indicator tube driver (IC601)
30 IIC-DATA I/O
Communication data bus with the fluorescent indicator tube driver (IC601)
31 NCO O Not used (open)
32 SQ-DATA I Subcode Q data input from the CXD2587Q (IC101) on the CD block
33 SQ-CLK O Subcode Q data reading clock signal output to the CXD2587Q (IC101) on the CD block
34 SW MODE O Not used (open)
35 CD-DATA O Serial data output to the CXD2587Q (IC101) on the CD block
36 RY-SW I
Connection detect signal input of the headphone jack (J701)
“L”: no connected, “H”: headphone connected
37 CD-CLK O Serial data transfer clock signal output to the CXD2587Q (IC101) on the CD block
38 493-LATCH O Serial data latch pulse output to the M62493FP (IC101)