FIC a440 Servicehandbuch

 

Troubleshooting and Repair 

 

6-16 

FIC A440 Series Service Manual 

6.4.4  CRT Interface Check 

Check CN18 and

CRT cable

Check L25, L26, L27,

L42, L43

Check VGA clock

OSC NB=14.318MHz

Check U24 Pin2

END

NO

YES

NO

YES

START

6.4.5 FDD Interface Check 

5

Check BIOS Setup

Menu

Enter Correct FDD

Type

Check if FDD is

properly formatted

Format Diskette or

Change Diskette

Check FDD Power

Check I/O board,

CN613 Pin22, 24, 26 =

5V

Check Motor of FDD

operation

Check I/P board

CN613 Pin17, Signal C

END

NO

YES

NO

NO

NO

YES

YES

Check Seek

operation

Check CN11, Pin42,

45, 35

NO

Check Read or Write

operation

Check CN11, PIN43,

44, 47

NO

YES

YES

YES