Phone Mute - Aiwa WD-X500M Service Manual

IC DESCRIPTION -1/1 (µPD178078GF-550-3BA) -1/3
QQ
3 7 63 1515 0
Pin No. Pin Name
1 DEP IN
2 RDS CLI
3 LCD DI
4 LCD DO
5 LCD CLO
6 LCD CE
7 AF MUTE
8 CDS DI
9 CDS DO
10 CDS CLO
11 CD DI
12 CD DO
13 CD CLI
14 CD DISP SEL
15 CD CONNECT
16 CD ACC CONT
17 CD CLO
18 EVOL CLO
19 EVOL DO
TE
20 EVOL CE
L 13942296513
21 LOC/DX
22 DSSA CONT
23 RDS-DI
24

PHONE MUTE

25 BA3834 A/D
26 NC
27 AVDD
28 TEST
29 MI1
30 MI2
31 FM/AM METER
32 AVSS
33 REG CPU
34 VDD
35 REG OSC
36 X2
37 X1
38 GND
www
39 IF REQ
40 GND
.
41 AM IF
http://www.xiaoyu163.com
I/O
I DEP detect input
I RDS clock input
I LCD data signal input
O LCD data signal output
O LCD sync clock signal output
O LCD driver CE signal output
O AUDIO MUTE control signal output
I CDS data signal input
O CDS data signal output
O CDS sync clock signal output
I Receive data signal input
O Send data signal output
I Receive sync clock signal input
O Outputs signal for timing of communications with CD changer
I Check for connections with CD changer
O CD changer ACC signal output
O Send sync clock signal output
O Clock output to electronic VR
O Data output to electronic VR
O CE output to electronic VR
O LOC/DX switching output during radio seek
O Outputs 'H' only during DSSA L/R operation
I RDS data input.
I MUTE control from exterior.
I A/D input from spectrum analyzer (BA3834F)
– Connect to ground
– Power supply
– CD test mode
I Diode matrix input for initial setting
I Diode matrix input for initial setting
I RDS AF signal input and FM/AM S meter signal input
– Ground
– CPU power regulator
– Power supply
– Regulator for oscillator circuit
O System clock oscillator output
I System clock oscillator input
– Ground
O IF count signal request output
x ao u163
y
– Ground
i
I AM IF count signal input
http://www.xiaoyu163.com
2 9
8
Description
Q Q
3 6 7 1 3 1 5
co
.
-25-
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9