JVC KS-FX621 Service Manual page 24

KS-FX621
4.4 LC72366-9B41 (IC701) : Micon
• Pin layout
• Pin function
Pin No. Symbol
1 XIN
2 TEST2
3 J-BUS SI
4 J-BUS SO
5 J-BUS SCK
6 J-BUS I/O
7 NC
8 LCD SO
9 LCD SCK
10 LCD CE
11 NC
12 SDA
13 SCL
14 NC
15 TUNER_ILL
16 TAPE_ILL
17 CD_ILL
18 DIMMER
19~24 NC
25 KS1
26 KS0
27 K3
28 K2
29 K1
30 K0
31 Vdd
32 TEST
33 FF/REW
34 SEEK/STOP
35 MONO
36 R/T
37 NC
38 POWER ON
39 ACC
40 IFC CONT
41 MOTER
42 SUB MOTER+
43 SUB MOTER-
44 BEEP
1-24 (No.49825)
64 ~ 41
1 ~ 24
I/O
I 4.5MHz crystal oscillation
- Connect to ground
I J-BUS signal data input (to 74HC126)
O J-BUS signal data output (to 74HC126)
O J-BUS output clock signal (to 74HC126)
I/O J-BUS I/O control ie. "H" = "O", "L" = "I" (to 74HC126)
- No use
O LCD driver data output (to LC75823E pin 64)
O LCD driver clock signal (to LC75823E pin 63)
O LCD driver chip enable port (to LC75823E pin 62)
- No use
O E. volume data output (to TEA6320T pin 1)
O E. volume clock output (to TEA6320T pin 32)
- No use
O Connect to LED (of TUNER button)
O Connect to LED (of TAPE button)
O Connect to LED (of CD button)
O Connect to display lamp supply
- No use
O Output for initial setting diode matrix
O Output for initial setting diode matrix
I Input for initial setting diode matrix
I Input for initial setting diode matrix
I Input for initial setting diode matrix
I Input for initial setting diode matrix
- 5V supply
I Change key input to test mode
O Change MS IC input sensitivity (L at FF/REW)
O IF count REQ and output [H] at seek.and scan
O Output [H] at FM forced monoral mode
O Output of mode radio / tape (Radio:H.Tape:L)
- No use
- Output [H] at power on
O Output [H] during [ACC DET] is [H]
O IF count control output (To tuner cct)
O Main motor output (Drive:H Stop:L)
O Sub motor output (sub motor loading )
O Sub motor output (sub motor eject)
O Beep on (output f :2.25KHz)
Function