Atari 1040STE, Руководство по обслуживанию на месте

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SECTION FIVE: SYMPTOM CHECKLIST
This section gives a brief summary of common problems and their most probable
causes. For more detail, refer to the section of troubleshooting in this document, or
the Diagnostic Cartridge Troubleshooting Guide
.
5.1 DISPLAY PROBLEMS
Symptom Probable Cause
Black Screen No power (check LED), bad GSTMCU chip, bad Video
Shifter. See
Section 3_3. Troubleshooting a Dead
Unit.
White Screen Video Shifter, GSTMCU, Memory Controller, DMA
Controller, 68000. Use diagnostic cartridge with
terminal connected via RS232 port.
Dots/Bars on Screen RAM, Memory Controller, Video Shifter. Use the
diagnostic cartridge.
One Color Missing Video cable or connector. Video summer, buffer, Video
Shifter. Check signals with oscilloscope.
Monochrome Monitor Verify that the monochrome monitor detect bit is being
Fails to Synch but grounded when monochrome monitor is plugged in.
Color Monitor Okay Check MFP GPIP bit 7; replace MFP.
Scrambled Screen GSTMCU, Memory Controller. Use diagnostic
Cartridge.
TV Output Bad Modulator, phase locked loop. Trace signal with
oscilloscope.
5 . 2 DISK DRIVE PROBLEMS
Symptom
Probable Cause
Disk Won't Boot Power supply. 1772, DMA Controller, PSG chip, disk drive
external ACSI buffer, external HD IRQ lines shorted to
ground. See if Select light goes on, if not, check PSG
outputs. Listen for motor spinning. If not, check power
supply. Swap disk drive or try external drive. If not working,
check DMA Controller 1772 with diagnostic chart.
Disk Won't Format 1772, DMA Controller, disk drive.
System Crash after Data on diskette, disk drive, 1772, DMA, or GSTMCU.
Loading Files Swap diskette, retry. Use diagnostic cartridge to check
1772, DMA Controller, GSTMCU; replace disk drive.
5.3 KEYBOARD PROBLEMS