Kenwood DV-5050M Service Manual

Also see for DV-5050M: Instruction manual Service manual

Contents

Kenwood DV-5050M Service Manual Manual pdf 8 page image

DV-5050M/5900M/DVF-J6050/J6050-G8CIRCUIT DESCRIPTIONPort No. Port Name I/O Function ActiveH L1 A16 O Address bus of SRAM (X25, IC14).2 A17 O Address bus of SRAM.3 SCL O Clock output for audio/video switching IC.4 SDA I/O Data input/output for audio/video switching IC.5 RD O Read strobe for SRAM (X25, IC14).6 WR O Write strobe for SRAM (X25, IC14).7 CS O Chip selector for SRAM (X25, IC14).8 ASTB - Unused.9 VDD - Supply voltage (+5V).10 RGB H O RGB signal output. DVF-J6050 (E/T) Only11 RWRREQ O Request of transmission data to remote cont. microcomputer.12 RWR I Read-out the data of remote cont. microcomputer.13 RTREN I Permission of transmission data from remote cont. microcomputer.14~21 D7~D0 O Data output to remote cont. microcomputer (X14, IC2).22 VPP - Unused.23 STB LED O Control port for power led. ON24 PURE LED O Control port for pure audio led. ON25 192k LED O Control port for 192kfs led. ON26 96k LED O Control port for 96kfs led. ON27 ICRESET O Reset signal output to display microcomputer (X14, IC1). RESET28 POWER O Power on/off control for regulator (X00, IC3). ON29 SUB WAKE O Output port of power on signal to sub microcomputer.30 EXSW O Switching port of (ext./int.) for video and audio output. INT.31 VMUTE O Video mute control port. MUTE32 PURE AUDIO - Unused. DV-5050M/DVF-J6050 -O Pure audio on/off control port. DV-5900M ON33 YC L O YC signal output. DVF-J6050 (E/T) Only OUT34 LINE2 - Unused.35 WIDE1 - Unused.36 WIDE2 - Unused.37 VDD - Supply voltage (+5V).38 X2 - System clock input.39 X1 I System clock input.40 VSS - Connected to GND.41 XT2 - Unused.42 XT1 - Unused.43 RESET I Reset signal input.44 REM I Remote control signal input.45 REM RCV I IR signal input.46 STB SUB IN I Strobe signal input from sub microcomputer.47 PLAY I Key input (PLAY) port. ON48 OPEN/CLOSE I Key input (OPEN/CLOSE) port. ON49 POWER ON I Input port of power on signal from sub microcomputer.50 NC - Unused.51 AVDD - Supply voltage (+5V).52 AVREFO - Connected to VDD.53 SHIMUKE I Discrimination of destination. K : 0V E : 5V54 KISYU I Discrimination of model. DV-5050M : 5V DV-5900M : 2.5V55 M/S SW I Input port of M/S switch. MAIN : 5V SUB1 : 2.5V SUB2 : 0V56 PLUGCH - Unused.57, 58 NC - Unused.59 JOG1 I Encoder signal input.60 JOG2 I Encoder signal input.4-2 Port Function of Main Microcomputer