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Complete MFG Service Manual at a good price FAST !
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Downloaded the manual, reasonably straightforward, pretty much exactly as advertised.
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very helpfull
circuit diagram and sparepart list available
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Very good reproduction (copy) of original manual. Didn't have a parts list, but schematic was completely labeled with parts. Complete instructions on how to adjust mechanical functions of the 8-track deck. Well worth having and at a very reasonable cost.
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It's a full manual. All the parts are in there. I haven't found the problem yett, but I am working on it; hope I can rebuild the part myself. To make it more secure and unbreakable this time. Because the part has failed several times before and costs a lot to let it be repaired.
Thanks so much for this rich illustrated and parted manual.
DV-502/503/DVF-3050/3550
CIRCUIT DESCRIPTION
2-4 DC Motor Driver : KA8082(ICM21)
Pin No. 1 2 3 4 5 6 7 8 Pin Name GND VO1 VCTL VIN1 VIN2 SVCC PVCC VO2 I/O O I I I O Description Ground Output 1 Motor speed control Input 1 Input 2 Supply voltage (Signal) Supply voltage (Power) Output 2
GND 1 DRIVER OUT VO1 2 PRE DRIVER VCTL 3 TSD LOGIC SWITCH VIN1 4 5 VIN2 BIAS 6 SVCC 7 PVCC 8 V02
Internal Block Diagram
2-5 HEX Inverter (Single Stage) : M74HCU04(IC501)
Pin No. 1,3,5,9 11,13 2,4,6,8 10,12 7 14 Pin Name A0 to A5 Q0 to Q5 GND VCC I/O I O Description Data Inputs Data Outputs Ground Positive Supply Voltage
Truth Table A L H Q H L
2-6 Flash Memory : M29W800AT(IC401)
Pin No. 25, 24~16, 8~1 29,31,33,35 38,40,42,44 30,32,34,36 39,41,43 45 26 28 11 12 15 47 37 27,46 Pin Name A0~A18 DQ0~DQ7 DQ8~DQ14 DQ15 CE QE WE RP RY/BY BYTE VCC VSS I/O I I/O I/O I/O O Description Address Inputs Data Input/Outputs, Command Inputs Data Input/Outputs Data Input/Outputs or Address input Chip Enable Output Enable Write Enable Reset/Block Temporary Unprotect Ready/Busy/Output Byte/Word Organization Supply Voltage Ground
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