Kenwood 1050MD - Circuit Description

No. Name I/O Description
1,2 - O N.C.
3 EXLAT O Output port of latch signal to IC32 (TC74HC4094)
4 EXCK O Clock output port to IC32 (TC74HC4094)
5 RD O SRAM WR
6 WR O SRAM WR
7 CS O SRAM CS L; SRAM enable
8 STB O Output port of strobe signal to IC33
9 Vdd - Power supply (Microprocessor)
10 POWER O Power terminal H; Power ON
11 MUTE O Mute control output L; Mute ON
12 INISW2 I Destination selector
13 SCHNG O E2PROM data IN/OUT change-over H; SDA output
14 SBUSY I/O 16 serial busy
15 SDATA I/O 16 serial data
16 SCL O Output port of clock signal to IC6 (X33)
17 SDA I/O Interface port of data signal from / to IC6 (X33)
18 LDON O Laser ON / OFF control port H; LD ON
19 RMS O Pick RMS H; ON
20 XLAT O System IC latch
21 SENS I System IC sens
22 GND - GND
23 PROTECT I Detection port of protect switch L; Protect ON
24 REFLECT I Detection port of reflect switch H; Low reflect
25 DISCIN I Detection of disc input switch L; Disc out SW ON
26 STTLMT I Detection port of limit switch L; Start limit SW ON
27 PHOTSW I Detection of mechanism play position L; Photo sensor ON
28 REC SW I Input port of detection from REC position switch L; REC SW ON
29 LOADIN O Output port of loading motor control signal L; Loading OUT
30 LOADOUT O Output port of loading motor control signal L; Loading IN
31 MNT0 I FOK signal from CXD2652AR (IC2) L; Focus ON
32 MNT2 I Input port of monitor 2 from CXD2652AR (IC2)
33 XRST O Output port of reset signal to CXD2652AR (IC2)
34 TX O Output port of recording permitted signal
35 RECP O Laser power control to CXD2652AR (IC2)
36 MNT3 I Input port of monitor 3 from CXD2652AR (IC2)
37 Vdd - Power supply (Microprocessor)
38,39 - Clock IN / OUT (12.5MHz)
40 GND - GND
41 OPEN O No used
42 GND I No used
1050MD/DM-5090/DM-9090
5
CIRCUIT DESCRIPTION
1. Mechanism microprocessor : uPD784215GF508 (X25- , IC31)
1-1 Pin description
1050MD/DM-5090(K) COVER 97.11.28 2:25 AM y[W 10