Pioneer KEH-1940, Service Manual

Page: 36 / 42

36
KEH-1940,1960
- Pin Functions (PE5107A)
Pin No. Pin Name I/O Format Function and Operation
1
mcmute
I Cassette mechanism mute input
2
tapld
I Tape loading input
3 EO O C Error output
4 VDD1 Power supply
5 GND GND
6 VCOIN I AM/FM VCO input
7 CE I ACC power sense input
8 VDD2 Power supply
9 LCK I/O C Serial clock input and output for LCD driver
10 LDT O C Data output for LCD driver
11 LDI I Key/LCD driver data input
12 FMSD I FM SD input
13 AMIF I AM IF signal input
14 SL I Signal level input
15
st
I FM stereo input
16
sk
Not used
17 DK Not used
18
swvdd
O C Grille power supply control output
19 NC Not used
20 VST O C Strobe pulse output for electronic volume
21 VCK O C Clock output for electronic volume
22 VDT O C Data output for electronic volume
23 NC Not used
24 XO O Crystal oscillator connection pin
25 XI I Crystal oscillator connection pin
26 GND GND
27–30 NC Not used
31 TEST I Test program mode input
32
dsens
I Grille detach sense input
33,34 GND GND
35–38 NC Not used
39
mute
O C System mute output
40 DMINH O C Mechanism mute cancel output
41,42 NC Not used
43 SYSPW O C System power supply control output
44–48 NC Not used
49 MS Not used
50 MECPW O C Cassette mechanism power output
51 AM O C AM power control output
52 LOCL O C LOC “L“ output
53 LOCH O C LOC “H” output
54 FM O C FM power control output
55
seek
O C Seek output
56 NC Not used
57 LW O C LW output
58 GND GND
59 DM3 Not used
60 DM2 Not used
61 DM1 I Model,function input
62 DM0 I Model,function input
63
nor
/
REV
I Tape running input
64 GND GND