Crt Interface Check - NEC Versa Note Series Service And Reference Manual

CRT Interface Check

FDD Interface Check
Check BIOS Setup
Check if FDD is
properly formatted
Check FDD Power
Check Motor of FDD
Check Read or Write
START
Check CN2 and CRT
cable
YES
Check VGA clock
14.318MHz and
32.768KHz
YES
END
5
Menu
YES
NO
YES
YES
operation
YES
Check Seek
operation
YES
operation
YES
END
NO
Check L44, L47, L49,
L48, L50
(RGB, Hsync, Vsync)
NO
Check U17
Pin71, Pin 93
NO
Enter Correct FDD
Type
Format Diskette or
Change Diskette
NO
Check +5V
NO
Check U27 Pin 100
(Motor0#) signal
NO
Check U27
Pin 10, 1, 2, 5, 6, 9
NO
Check U27
Pin 7, 8, 12, 14
Troubleshooting and Repair 6-17