Kenwood DM-VH7 Service Manual page 4

DM-VH7
QQ
3 7 63 1515 0
2-2 Pin description
Pin No. Name
1 VOL_DT
2 VOL_CK
3
4 DISP_CE
5 DISP_OUT
6 DISP_IN
7 DISP_CLK
8 BYTE
9 CNVss
10,11
12 RESET
13 Xout
14 Vss
15 Xin
16 Vcc
17 NMI
18
19 CE
20 REM
21 DISP_RST
22 LCD_BL
23 POWER
24 LED_EJECT
25 BACK_V_CHK
26 BACK_V_ON
TE
L 13942296513
27 MECHA_CE
28 MECHA_RST
29 MECHA_RXD
30 MECHA_TXD
31~34
35 TIRLER_TXD
36 TIRLER_RXD
37 SDATA
38 SBUSY
39 RDY
40
41 HOLD
42~61
62 Vcc
63
64 Vss
65~74
75 AMUTE
76,77
78 LED_REC
79
80 LED_STBY
81~88
89~91 KR0~2
92 BACK_V
93 INISW
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94 XY_POSITION
95 I_PROTECTION
96 AVss
97
.
98 Vref
99 AVcc
100 VOL_LEN
4
CIRCUIT DESCRIPTION
I/O
O Electric VOL IC • communication data
O Electric VOL IC • communication clock
- O Not used
O Display ucom • communication CE
O Display ucom • communication data output
I Display ucom • communication data input
O Display ucom • communication clock
- Ucom mode data bus setting
- Ucom mode • inner ROM
- - Not used
I Ucom reset
O Ucom oscillation 10MHz output
- GND
I Ucom oscillation 10MHz input
- Power supply
- Ucom compulsion thrust
- O Not used
I Ucom CE
I Remote control input
O Display ucom reset
O LCD backlight (Dimmer)
O Power supply circuit
O LCD • EJECT(Dimmer)
O Backup voltage check circuit
O Backup charge
O MD mecha. ucom CE
O MD mecha. reset
I MD mecha. communication input
O MD mecha. communication output(N-ch)
- - Not used
O Titular communication output
I Titular communication input
I/O Serial data (SL16)
I/O Serial busy (SL16)
I Extension bus control
- - Not used
I Extension bus control
- - Not used
- Ucom power supply (5V)
- - Not used
- Ucom power supply (GND)
- - Not used
O Analog mute
- - Not used
O LED REC
- - Not used
O LED STANDBY
- - Not used
I Key return
I Backup voltage check
I Destination switch
I X-Y position
I Current protection
x ao
y
- A/D power supply (GND)
- - Not used
i
- A/D reference voltage (5V)
- A/D power supply (GND)
O Electric VOL IC • communication data latch
8
Description
Q Q
3 6 7 1 3
u163
.
2 9 9 4 2 8
H: ON
H: ON
H: ON
1 5 0 5 8 2 9 9 4
L: RESET ON
H: except J type
m
co
9 9
2 8 9 9