Kenwood DM-VH7 Service Manual page 7

QQ
3 7 63 1515 0
Pin No. Name
91 MNT1
92 XINT
93~95 -
96 TX
97 RECP
98 XRST
99 LDON
100 RMS
3-3 Port control
EBITRATE (46 pin): UART communication speed
changeover
Input voltage
Vref × 1.0
~
Vref × 0.8
~
Vref × 0.6
~
Vref × 0.4
~
Vref × 0.2
TE
L 13942296513
~
Vref × 0.0
EHEADPOS(47pin): Head position detection
Input voltage
Vref × 1.0
~
Vref × 0.62
~
Vref × 0.45
EIDSW(48 pin): DISC type detection
Input voltage
Vref × 1.0
~
Vref × 0.69
~
Vref × 0.32
www
.
CIRCUIT DESCRIPTION
I/O
I ACRIC/ATRAC en/decoder IC shock (track jump) detection
I ATRAC thrust
- Not used
O ACRIC/ATRAC en/decoder IC TX (Recording data output enable)
O ACRIC/ATRAC en/decoder IC RECP (Laser power changeover)
O ACRIC/ATRAC en/decoder IC reset
O Laser ON
O Pickup frequency changeover
Bit rate
9600bps
14400bps
28800bps
33600bps
38400bps
19200bps
Head position
OFF
PLAY position
REC position
DISC type
LOW REFLECTION DISC
(PROTECT ON)
LOW REFLECTION DISC
(PROTECT OFF)
HIGH REFLECTION DISC
x ao
y
i
8
Description
4. LCD display microprocessor
4-1 Description
Pin No. Name I/O
1 DO
2 DI
3 CLK
4 RESET
5 NMI
6 Vcc
7 STBY
8 Vss
Q Q
3 6 7 1 3
9 XTAL
10 EXTAL
11 MD1
12 MD0
13 AVss
14~21 -
22 AVcc
23~30 -
31 Vcc
32~39 -
40 Vss
41~47 -
48 A0
49~56 D0~D7 I/O LCD drive control
57 -
58 LAT
59 -
60 RD
61 WR
62 CS1
63 -
64 -
u163
.
DM-VH7
2 9 9 4 2 8
HD6433297A17F(X25:IC12)
Description
O Communication data output
I Communication data input
I Communication clock input
I Ucom reset
I (Non mask able thrust)
- Ucom power supply
I Ucom standby
- Ucom power supply)GND)
1 5 0 5 8 2 9 9 4
- ucom OSC(16MHz)
I ucom OSC(16MHz)
I Ucom mode MD0/MD1
I Ucom mode inner ROM
extension mode :
- Ucom A/D power supply(GND)
- Not used
- Ucom A/D power supply
- Not used
- Ucom power supply
- Not used
- Ucom power supply (GND)
- Not used
O LCD drive control
- Not used
I Communication latch /thrust
I Not used
O LCD drive control
O LCD drive control
O LCD drive control
- Not used
- Not used(Pull up)
m
co
9 9
2 8 9 9
7