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zipped Download Service Manual Model 1540/1541 Disk Drive PN-314002-01


Service Manual Model 1540/1541 Disk Drive
November 1985 PN-314002-01

Contents



Title (COVER) Page
SPECIFICATIONS 1
BLOCK DIAGRAM 2
OVERVIEW 3
CARE AND MAINTENANCE, FLASH CODE 4
CIRCUIT THEORY
   POWER SUPPLY 5
   RESET CIRCUITS 6
   CLOCK CIRCUITS 7
   MICROPROCESSOR CONTROL OF RAM & ROM 8
   SERIAL INTERFACE 9
   MICROPROCESSOR R/W AND MOTOR CONTROL LOGIC 10
   READ/WRITE CONTROL LOGIC 11
   READ AMPLIFIER 12
   WRITE AMPLIFIER 13
   POWER UP/DOWN WRITE PROTECTION 14
   STEPPER MOTOR CONTROL CIRCUITS 15
   SPINDLE MOTOR CONTROL CIRCUITS 16
   TROUBLESHOOTING GUIDE 17
   TROUBLESHOOTING GUIDE (Continued) 18
   RESISTANCE CHECKS 19
   CASEWORK/ACCESSORY PARTS LIST 20
   MODEL IDENTIFICATION, DEVICE NUMBER CHANGE 21
PCB ASSEMBLY 1540001
   BOARD LAYOUT 22
   PARTS LIST 23
   PARTS LIST (continued) 24
   PN 325572 Pinout and Internal Diagram 25
   SCHEMATIC 25
PCB ASSEMBLY 1540008
   BOARD LAYOUT 26
   PARTS LIST 27
   UPGRADE NOTES 29
   SCHEMATIC 29
PCB ASSEMBLY 250442, 250446
   BOARD LAYOUT 30
   PARTS LIST 31
   IC PINOUTS AND INTERNAL DIAGRAMS 33
   SCHEMATICS (1541-1B) 33B
   PARTLIST PCB 250448 33A
   SCHEMATIC #251748 33C
PCB ASSEMBLY 1540002
   PARTS LIST, TRANSFORMER, ASSEMBLY DRAWING 34
ALPS DRIVE ASSEMBLY
   PARTS LIST, WIRING DIAGRAM AND LAYOUT 35
   MOTOR CONTROL PCB SCHEMATIC 36
NEWTRONICS DRIVE ASSEMBLY
   PARTS LIST, WIRING DIAGRAM AND LAYOUT 37
   MOTOR CONTROL PCB SCHEMATIC 38



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