JVC KS-FX321 Service Manual page 16

KS-FX321
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4.2 LC72362N-9B39 (IC701) : Micon 3 7 63 1515 0
• Pin layout
25
40
• Pin functions
Pin
Symbol I/O
No.
1 XIN
2 GND
3 J BUS SI
4 J BUS SO O Bus serial data output to CP751
5 J BUS SCK O Bus serial clock output to CP751
6 J BUS I/O SEL O BUS I/O switch signal output
7 NC
8 LCD SO O Serial data output to IC651
9 LCD SCK O Serial clock output to IC651
10 LCD CE O Chip enable output to IC651
11 NC
12 E.VOL SO O Serial data output
13 E.VOL SCK O Serial clock output
14 CE
15 TE TUNER ILLUM
L 13942296513
16 TAPE ILLUM
17 CD ILLUM
18 DIMMEROUT
19 NC
20 NC
21 NC
22 NC
23 NC
24 NC
25 KS1
26 KS0 O Initializing output port
27 K3
28 K2
29 K1
30 K0
31 Vdd
32 TEST
33 NC
34 SEEK/STOP O Output the "If signal request"
35 MONO O Monaural and stereo change over
36 R/T
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37 NC
38 POWER CNT O Power control output
39 NC
40 NC
41 IF CONT
42 NC
1-16 (No.49771)
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24 - 1
80
64
41 - 64
Function
I Crystal oscillator
- To GND
I Bus serial data input from CP751
- Non connect
- Non connect
- Chip enable output
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
I Initializing input port
I Initializing input port
- Non connect
I Initializing input port
- Power supply
I Test iput
- Non connect
output
- Non connect
- Non connect
x ao
- Non connect
. i
- Non connect
- Non connect
- Non connect
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Pin
Symbol
No.
43 NC
44 NC
45 NC
46 NC
47 NC
48 TAPE IN
49 F/R SENCE
50 TAPE MUTE
51 SD/ST
52 NC
53 DETACH
54 NC
55 J BUS INT
Q Q
3 6 7
56 REMOCON
57 FM/AM
58 DOLBY
59 NC
60 MUTE
61 MEMORY DET
62 LEVEL METER
63 SMETER
64 KEY 2
65 KEY 1
66 KEY 0
67 ACCDET
68 SENS
69 NC
70 FM/AM IF COUNT - AM/FM Frequency detection
71 NC
72 NC
73 Vdd
74 AM OSC
75 FM OSC
76 Vss
77 NC
78 EO
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79 TEST 1
80 XOUT
2 9 9 4
8
I/O Function
- Non connect
- Non connect
- Non connect
- Non connect
- Non connect
I H:RADIO L:TAPE
I FORWARD/REVERSE switch de-
tector
I DIR.FF/REW.MUTE
I Station detector and ST input
- Non connect
I Detection of Front Panel
- Non connect
I BUS interruption signal detection
communication
1 3 1 5 0 5 8 2 9
- TO GND
I Change over the FM/AM iuput
- Non connect
- Non connect
- The mute time is controlled by the
connected
I Memory detector input
I -----
I Signal meter input
I Momentary key input
I Momentary key input
I Momentary key input
I ACC DET
- To GND
I Non connect
- Non connect
- Non connect
I Power supply
I Input the local oscillator signal of AM
- Input the local oscillator signal of FM
- Power supply
m
- Non connect
- PLL Error signal output
co
O To GND
. O Crystal oscillator
2 8
9 9
9 4 2 8 9 9