JVC UX-L30, Service Manual

Page: 32 / 73

1-32
UX-L40/UX-L30
2. Pin Function
Symbol Pin No. I/O Function
1~4
5~7
8
9
10
11
12
13
14
15
16
17
18
19
20, 21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
COM3~0
VLC3~1
VDD
OSC2
OSC1
VSS
NC
NC
MMOD
VREF-
SAFETY0
SAFETY1
TAPE0
TAPE1
KEY0, 1
DOOR_RST
CDSAFETY
VREF+
SDATA
NC
SCK
NC
QRIN
SQCK
F_CD
/RST
MPX
BCTL
VOLCE
NC
PROTR
REM
RDSCK
BLKCK
FLAG
STAT
SMUTE
SPKMUTE
AHB
LCD Bias co mmon
LCD Bias voltage
5V
Main oscillation 12MHz
Main oscillation 12MHz
Ground
No use. Fixed to VSS.
No use. Open
Fixed to ground
Ground
Irregular voltage detection 0
Irregular voltage detection 1
Tape Switch 0
Tape Switch 1
Unit KEY INPUT
Rest/close switch detect port
CD safety voltage detect port
5V
Serial data (Tuner/ PLL IC)
No use. OUTPUT LOW
Serial clock (Tuner/ PLL IC)
No use. OUTPUT LOW
Q-code data input port
Q-code serial clock
CD Function ("H"= CD)
RESET
FM stereo detection ( 'L'= stereo)
During Back up set H, other case L.
This back up means plug out.
volume chip enable
No use. OUTPUT LOW
Protector detect. When detect
PROTR=L, set SPKMUTE to 'L'.
Remoto control input
RDS clock
Block clock input port
Error Correction Count Input
CD status input port
MUTE ON=L
Speaker mute.When detect
PROTR=L, set SPKMUTE to 'L'.
Active Hyper Bass On/Off
AHB OFF=H, AHB1, 2=L
1. Pin layout
MN101C38CEK1 (IC931) : Micro controller
25 ~ 1
51 ~ 75
76
~
100
50
~
26
-
-
-
O
I
-
I
O
I
-
I
I
I
I
I
I
I
-
I/O
O
O
O
I
O
O
I/O
I
O
O
O
I
I
I
I
I
I
O
O
O
Symbol Pin No. I/O Function
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67~88
89~100
DIMCTL
LEDCTL
SURR
NC
SEG12
MDATA
MCLK
XRST
MLD
STTA
REEL
VOL+
VOL-
PERIOD
F_TU
CLOSE
OPEN
P_OUT
BUP
BTLMUTE
NC
SEG13~34
SEG0~11
LCD DIM control. DIMMER ON =L
Power standby LED control
STANDBY = L, POWER ON = H
Surround IC control, H:=Surroud on
No use. Open
SEGMENT OUTPUT
CD data input port
CD data clock
CD reset
CD command ready signal
Tape IC strobe
Reel pulse input
Volume plus
Volume minus
Tuner pLL strobe
Tuner function ('H'=Tuner)
Door close motor control output
Door open motor control output
Power on/off ('H'=Power ON)
Back up power detect. When detect 'H',
goto backup mode (STOP mode).
BTL mute control port. MUTE ON =L
During non CD play , MUTE ON.
No use. OUTPUT LOW
SEGMENT OUTPUT
SEGMENT OUTPUT
O
O
O
O
O
O
O
O
O
O
I
I
I
O
O
O
O
O
I
O
O
O
O