Diagrams; Ic Pin Description - Sony SDX-3180 Service Manual

4-1. IC PIN DESCRIPTION

• IC801 µPD17705GC-526-3B9 (SYSTEM CONTROL)
Pin No. Pin Name
1 SIRCS
2 IN-SW
3 D-SW
4 SELF-SW
5 L-SW
6 LM-EJ
7 LM-LOD
8 ANT-ON
9 MONO
10 SD
11 BAND-SW
12 AREA1-SW
13 AREA2-SW
14, 15 RE1, 2
16 SEEK
17 – 20 NC
21 GND3
22 – 24 KEYIN3 – 1
25 ROT-IN
26 S-METER
27 TEST-SW
28 AM-IFC
29 FM-IFC
30 VDD2
31 VCOH-FM
32 VCOL-AM
33 GND2
34 NC
35 EO1-PDOUT
36 TESTO
37 AM-ON(TU-ON)
38 FM-ON(FM/AM)
39 LCL/DX
40 BEEP
41 ACC-IN
42 SCOR
43 MUTE
44 AMP-MUTE
45 TEL-MUTE
46 NC
47 VOL-CE
48 VOL-CLK
49 VOL-DATA
50 EMPHO
51 PW-ON
52 MD-ON
53 CD-ON
54 ILL-ON
55, 56 MOD1, 2
57 NC
58 LCD-CE
SECTION 4

DIAGRAMS

I/O
I SIRCS input (A/D)
I CD mechanism position detection
I CD mechanism position detection
I CD mechanism position detection
I LIMIT switch
O Loading motor control (Eject direction)
O Loading motor control (Loading direction)
O Power control for amplifier.
O Force MONO output (Not used.)
I SD signal input
I Band plan setting of general area.
I Destination select 1
I Destination select 2
I Rotary encoder input 1, 2
O SEEK output
— Not used.
— GND
I A/D key input 3 – 1
I Rotary commander input
I FM and MW/LW common signal meter A/D conversion input.
I TEST mode select input
I MW/LW center frequency input
I FM center frequency input
— Power supply (+5 V)
I Local oscillation frequency input (FM)
I Local oscillation frequency input (MW/LW)
— GND
— Not used.
O Error out output
— Fixed at "L".
O MW/LW power output (MW/LW select)
O FM power output (FM select)
O LOCAL/DX select ("H" : LOCAL, "L" : DX)
O BEEP output
I Accessory input
I SUBQ data read request
O System mute output
O Power amplifier mute output
O Telephone mute output
— Not used.
O Electric volume chip select
O Electric volume serial clock
O Electric volume serial data
O De-emphasis control output
O System power control
O Loading motor power
O Servo drive power
O Illumination output
O Bus boost control 1, 2
— Not used.
O LCD drive chip select output
– 19 –
Pin Description