Diagrams; Ic Pin Descriptions - Sony CDX-CA900 Service Manual

3-1. IC PIN DESCRIPTIONS

• IC501 MB90574CPMT-G-367-BNDE1 (SYSTEM CONTROL) (US, Canadian Model)
• IC501 MB90574CPMT-G-368-BNDE1 (SYSTEM CONTROL) (AEP, UK, E Model)
Pin No. Pin Name
1 RF OK
2 CD RST
3 A0
4 STB
5 ATT
6 XTAL EN
7 LIMIT
8 VCC
9 AMP ATT
10 E2PSIO
11 E2PCKO
12 DOOR SW/FLS SI
13 FLS SO
14 BUS ON
15 BEEP
16 (NCO)
17 UNISI
18 UNISO
19 UNICKO
20, 21 (NCO)
22 SYSRST
23 (NCO)
24 SIRCS
25 TSI
26 TSO
27 TCKO
28 PH1
29 CD DSW
30 IN SW/PH2
31 PH3
32 CD LM LO
33 VSS
34 C
35 CD LM EJ
36 AMP ON
37 VOLATT
38 DVCC
39 DVSS
40 ADSO1
41 ADSO2
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 KEYIN0
47 NC
48 RC IN0
49 (NCO)
50 QUALITY
SECTION 3

DIAGRAMS

I/O
I Servo IC RFOK signal input from servo IC (IC1)
O Servo IC reset signal output to servo IC (IC1)
Servo IC command/parameter identification signal output to servo IC (IC1)
O
Command transmission: "L"
O Servo IC data storob signal output to servo IC (IC1) Data latch: "L"
O System mute control signal output
O Not used in this set.
I CD mechanism limit switch signal input (SW3)
— Power supply pin (+5 V)
O Power amp mute signal output to power amp (IC381)
I/O EEPROM data signal input/output with tuner unit (TUX201)
O EEPROM clock signal output to tuner unit (TUX201)
I Front panel open/close detection signal input/Flash write data signal input
O Flash write data signal output
O Bus on control signal output
O Beep signal output to power amp (IC381)
O Not used. (Open)
I SONY bus data signal input
O SONY bus data signal output
O SONY bus clock signal output
O Not used. (Open)
O System reset signal output to bus interface (IC601)
O Not used.
I Remote control data signal input
I Servo IC serial data signal input from servo IC (IC1)
O Servo IC serial data signal output to servo IC (IC1)
O Servo IC serial clock signal output to servo IC (IC1)
I CD mechanism PH1 detection signal input Not used in this set.
I CD mechanism down switch signal input (SW4)
I CD mechanism disc-in switch signal input (SW1)
I CD mechanism PH3 detection signal input Not used in this set.
O CD mechanism loading motor control signal output
— Ground pin
— Capacitance pin of power stabilized
O CD mechanism eject motor control signal output
O Amp on signal output to power amp (IC381) "L": OFF, "H": ON
O Electronic volume mute signal output to electronic volume (IC301) "L": Mute
— D/A converter VREF input (+5 V)
— D/A converter ground pin
O ADSO select switch output 1
O ADSO select switch output 2
— Analog power supply pin (+5 V)
— A/D convert Vref+ input (+5 V)
— A/D convert Vref– input (0 V)
— Analog ground pin
I Key signal input
O Not used. (Open)
I Rotary commander signal input from remote in jack (J651)
O Not used. (Open)
I Tuner noise detection signal input (E model)
CDX-CA900/CA900X
Pin Description
Ver 1.1
13