Sony CDC-R30MP Service Manual page 21

• IC901 µPD178076GF-572-3BA (SYSTEM CONTROL) (MAIN BOARD) (CDC-X30MP)
• IC901 µPD178078GF-590-3BA (SYSTEM CONTROL) (MAIN BOARD) (CDC-R30MP)
Pin No. Pin Name
1 BATT IN
2 DFP IN
3 LCD DI
4 LCD DO
5 LCD CLO
6 LCD CE
7 BBE1
8 CDS DI
9 CDS DO
10 CDS CLO
11 – 15 NC
16 BBE2
17 NC
18 EVOL CLO
19 EVOL DO
20 EVOL CE
21 LOC/DX
22 DSSA CONT
23 ACC DETECTOR
24 PHONE MUTE
25 LEVELIND
26 TEST
27 AVDD
28 – 30 NC
FM/AM
31
S METER
32 AVSS
33 REGCPU
34 VDD
35 REGOSC
36 X2
37 X1
38 GND
39 IF REQ
40 GND
41 AM IF
42 FM IF
43 VDD PLL
44 FM OSC
45 AM OSC
46 GND PLL
47, 48 EO 0, EO 1
49 IC
50 RESET
51 RDS CLK IN
52 ACC IN
53 RMT IN
54 ST IND/SD IN
55 NC
I/O
I BATT signal input
I Front panel with/without detection signal input
I LCD data signal input from the LCD driver IC (IC601)
O LCD data signal output to the LCD driver IC (IC601)
O LCD sync clock signal output to the LCD driver IC (IC601)
O LCD driver CE signal output to the LCD driver IC (IC601)
O BBE on/off change signal output to the electronic volume IC (IC401)
I CDS data signal input from the mechanism control IC (IC301)
O CDS data signal output to the mechanism control IC (IC301)
O CDS sync clock signal output from mechanism control IC (IC301)
O Not used in this set. (Open)
O BBE effect change signal output
O Not used in this set. (Open)
O Clock signal output to the electronic volume IC (IC401)
O Data signal output to the electronic volume IC (IC401)
O CE signal output to the electronic volume IC (IC401)
O LOC/DX change signal output when radio seek to the tuner unit (TU101)
O DSSA control signal output DSSA L/R operation: "H"
I Power overvoltage detection signal input
I Mute control signal input from external
I Voltage detection signal input for level indicater
— CDS test mode pin "L": Test mode
— Power supply pin (+5 V)
I Not used in this set. (Connected to ground.)
CDC-R30MP: RDS AF signal input
I
CDC-X30MP: FM/AM S meter signal input
— Ground pin
— Regulator pin for CPU power supply
— Power supply pin (+5 V)
— Regulator pin for oscillation circuit
— System clock oscillation connection pin (6.3 MHz)
— System clock oscillation connection pin (6.3 MHz)
— Ground pin
O IF count request signal output from the tuner unit (TU101)
— Ground pin
I AM IF count signal input from the tuner unit (TU101)
I FM IF count signal input
— Power supply pin for PLL (+5 V)
I FM local oscillator signal input from the tuner unit (TU101)
I AM local oscillator signal input from the tuner unit (TU101)
— Ground pin for PLL
O Error out signal output from the charge pomp
— Not used in this set. (Connected to ground.)
I System reset signal input from the SW901
CDC-R30MP: RDS clock signal input from the RDS IC (IC151)
I
CDC-X30MP: Not used in this set. (Connected to ground.)
I Accessory on/off detection signal input
I Remote control signal input from the remote control receiver IC (IC681)
Stereo signal input when FM/AM receive "H": Mono, "L": Stereo
I
Broadcasting station signal input when seek "H": LOC, "L": DX
— Not used in this set. (Open)
CDC-R30MP/X30MP
Pin Description
21