Sony CDX-CA850X Service Manual page 19

• IC501 MB90574BPMT-G-323-BND (MAIN SYSTEM CONTROL) (CDX-CA850X/CA860X) (MAIN BOARD)
• IC501 MB90574BPMT-G-324-BND (MAIN SYSTEM CONTROL) (CDX-CA850) (MAIN BOARD)
Pin No. Pin Name
1 – 4 NCO
5 ATT
6, 7 NCO
8 VCC
9 AMP ATT
10 E2PSIO
11 E2PCKO
12 DOOR SW/FLS SI
13 FLS SO
14 BUS ON
15 BEEP
16 NS MASK
17 UNISI
18 UNISO
19 UNICKO
20 IFWIDTH
21 SWSHIFT
22 SYSRST
23 (NCO)
24 SIRCS
25 – 29 NCO
30 AMPON
31 VOLATT
32 NCO
33 VSS
34 C
35 – 37 NCO
38 DVCC
39 DVSS
40, 41 (NCO)
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 KEYIN0
47 KEYIN1
48 RCIN0
49 NCO
50 QUALITY
51 FM AGC
52 MPTH
53 VSM
54 VCC
55, 56 NCO
57 BOOT
58 DOORIND
59 – 62 NIL
63 VSS
64 NIL
65 FSW IN
66 – 68 NCO
I/O
O Not used. (Open)
O System mute control signal output
O Not used. (Open)
— Power supply pin (+5 V)
O Amp mute signal output
I/O EEPROM data signal input/output
O EEPROM clock signal output
I Door switch signal input (L: close) Flash write data signal input
O Flash write data signal output
O BUS ON control signal output
O Beep signal output
O Tuner mute signal output
I SONY BUS data signal input
O SONY BUS data signal output
O SONY BUS clock signal output
O Not used. (Open)
O Not used. (Open)
O System reset signal output
O Not used. (Open)
I Remote control data signal input
O Not used. (open)
O Amp on signal output (L: OFF/H: ON)
O Electronic volume mute signal output (L: Mute on)
O Not used. (Open)
— Ground pin
— Power stabilized capacitance pin Not used. (open)
O Not used. (Open)
— D/A converter VREF input
— D/A converter GND pin
O Not used. (Open)
— Analog power supply pin (+5 V)
— A/D converter VREF+ input
— A/D converter VREF– input
— Analog ground pin
I Key signal input 0
I Key signal input 1
I Rotary commander signal input
O Not used. (Open)
O Quality signal output
O Not used in this set. (Open)
O MPTH signal output to RDS decoder
I S-meter signal input
— Power supply pin (+5 V)
O Not used. (Open)
O Display microcomputer write control signal output
O Front panel indicator signal output
I Not used. (Connect to ground in this set.)
— Ground pin
I Not used. (Connect to ground in this set.)
O Not used. (Open)
O Not used. (Open)
CDX-CA850/CA850X/CA860X
Pin Description
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