Download Print this page

Circuit Description - Kenwood 1050MD Service Manual

Hide thumbs Also See for 1050MD:

Advertisement

1. Mechanism microprocessor : uPD784215GF508 (X25- , IC31)
1-1 Pin description
No.
Name
1,2
-
3
EXLAT
4
EXCK
5
RD
6
WR
7
CS
8
STB
9
Vdd
10
POWER
11
MUTE
12
INISW2
13
SCHNG
14
SBUSY
15
SDATA
16
SCL
17
SDA
18
LDON
19
RMS
20
XLAT
21
SENS
22
GND
23
PROTECT
24
REFLECT
25
DISCIN
26
STTLMT
27
PHOTSW
28
REC SW
29
LOADIN
30
LOADOUT
31
MNT0
32
MNT2
33
XRST
34
TX
35
RECP
36
MNT3
37
Vdd
38,39
40
GND
41
OPEN
42
GND

CIRCUIT DESCRIPTION

I/O
O
N.C.
O
Output port of latch signal to IC32 (TC74HC4094)
O
Clock output port to IC32 (TC74HC4094)
O
SRAM WR
O
SRAM WR
O
SRAM CS
O
Output port of strobe signal to IC33
-
Power supply (Microprocessor)
O
Power terminal
O
Mute control output
I
Destination selector
O
E2PROM data IN/OUT change-over
I/O
16 serial busy
I/O
16 serial data
O
Output port of clock signal to IC6 (X33)
I/O
Interface port of data signal from / to IC6 (X33)
O
Laser ON / OFF control port
O
Pick RMS
O
System IC latch
I
System IC sens
-
GND
I
Detection port of protect switch
I
Detection port of reflect switch
I
Detection of disc input switch
I
Detection port of limit switch
I
Detection of mechanism play position
I
Input port of detection from REC position switch
O
Output port of loading motor control signal
O
Output port of loading motor control signal
I
FOK signal from CXD2652AR (IC2)
I
Input port of monitor 2 from CXD2652AR (IC2)
O
Output port of reset signal to CXD2652AR (IC2)
O
Output port of recording permitted signal
O
Laser power control to CXD2652AR (IC2)
I
Input port of monitor 3 from CXD2652AR (IC2)
-
Power supply (Microprocessor)
-
Clock IN / OUT (12.5MHz)
-
GND
O
No used
I
No used
1050MD/DM-5090/DM-9090
Description
L; SRAM enable
H; Power ON
L; Mute ON
H; SDA output
H; LD ON
H; ON
L; Protect ON
H; Low reflect
L; Disc out SW ON
L; Start limit SW ON
L; Photo sensor ON
L; REC SW ON
L; Loading OUT
L; Loading IN
L; Focus ON
5

Hide quick links:

Advertisement

loading

This manual is also suitable for:

Dm-5090Dm-9090