Phone Mute - Aiwa CT-FX5300M Service Manual

IC DESCRIPTION
IC, µPD178018AGF/IC, µPD178006AGC-539-3B9
Pin No. Pin Name
1 AM/FM S-M
2 LEVEL-M
3 A-VOL CONT
4 CD CONNECT
5 CD DISP SEL
6 CD CLO
7 CD DI
8 CD DO
9 CD CLI
10 LCD CE
11 DFP LAMP
12 LCD DI
13 LCD DO
14 LCD CLO
15 CD ACC CONT
16 POWER MUTE
17 ST-BY MUTE
18 POWER CONT
19 CONT 1
20 CONT 2
21 GND
22 VDD
23 MUTE
24 BAND CONT
25 RADIO CONT
26 RDS MODE
27 IF REQ
28 AM IF
29 FM IF
30 VDD
31 FM OSC
32 AM OSC
33 GND
34 EO 0
35 EO 1
36 GND
37 LOC/DX
38 ST IND/SD IN
39

PHONE MUTE

I/O
I AF signal input during RDS AF operation and FM S meter signal input
I Level meter signal input
I Detects microphone input for auto volume operation.Pulled down when not used.
I CD changer connection check. Pulled down when not used.
Determines the timing with which data is transferred to the head unit.Open when not
O
used.
O Clock output to CD changer. Open when not used.
I Data input from CD changer. Pulled down when not used.
O Data output to CD changer. Open when not used.
I Clock input from CD changer. Open when not used.
O LCD DRV (LC75854W) CE output.
O Outputs "H" only when FLAP IN (pin 67) is "L".Open when not used.
I/O LCD DRV (LC75854W) data input.
O Open when not used. LCD DRV (LC75854W) data output.
O LCD DRV (µIPD16432B) clock output. LCD DRV (LC75854W) clock output.
O Transmits the power on/off status of head unit to changer. Open when not used.
O Muting output to power amp
O Standby/muting output to power amp
O Unit power control output
O LCD DRV power control 1
O LCD DRV power control 2
– Ground for port
– Power supply for port
O Audio muting output
O AM/FM power switching output. AM:"H", FM: "L".
O Radio ON/OFF. Power switching output. Radio ON: "H".
O Outputs "H" during RDS AF operation. Open when not used.
O Output to request IF count signal.
I AM IF count signal input
I FM IF count signal input
– Power supply for PLL
I FM local oscillation input
I AM local oscillation input
– Ground for PLL
O Error output from charge pump (for FM)
O Error output from charge pump (for AM)
– Ground
LOC/DX switching output during radio seek (LOC: "H", DX: "L"). Open when not
O
used.
I Stop pulse input during FM/AM seek.
I Muting control input -20 dB. Mute: "L".
16
Description