AT&T PC 6300 - Page 380

MAINTENANCE
Keyboard 5-69
Video System 5-73
Parallel Port 5-88
Serial Port Test (Using 8250) 5-91
Mini-Floppy Disk Drive 5-94
Hard Disk Unit 5-99
Parallel Printer Test 5-105
8087-2 Math Co-Processor 5-109
Mouse 5-112
Mouse Test 5-114
8530 Serial Port Test 5-118
5-2
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Video Option Board (Display Enhancement A
Board) 5-121 j i
Video Option Board Test 5-125
Second Hard Disk Unit 5-135
STAND-ALONE MOTHERBOARD DMA
TEST DIAGNOSTICS 5-142
Test Description 5-142
Loading DM A Test 5-142 ^
Operating Procedures 5-143 j j
POWER SUPPLY
ADJUSTMENT 5-145
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