Panasonic JU-253-T

6.3 Trouble Analysis Table
Item Trouble
Index detection
failure
2
Not ready
3
Track 0
detection failure
4 No seek
5
No WRITE
6 No READ
7 READ ERROR
8
IN USE LED
won't light.
9
Write protect
failure
Table6.1
NO
Cause
1 DD motor control PCB
1---1------"'----"----------1 Replace DD motor,
2 DD motor fault
Base assembly
3
Index LED fault
1---1-------'""-----------1 Replace DD motor,
4
5
6
1
2
1
2
1
2
3
1
2
3
4
1
2
3
2
3
4
5
6
7
8
9
10
2
2
Index detector fault
PCB motor ON circuit
PCB index detection circuit
See Item 1.
PCB read circuit
Track 00 assembl
PCB track O detection failure
Ste
er motor
Guide shaft contamination or dama
PCBste er driver circuit
See Item 1.
Head disconnected
Head shorted
PCB write circuit
See Item 1.
See Item 5.
PCB read circuit
See Item 1.
See Item 6.
Ali nment
Azimuth
Burst
As mmetr
Limiter
Fla
0
Index period
PCB read circuit
LED art
PCB IN USE circuit
Write protect part
Write
rotect circuit
ed
Base assembly
Re
Re
Re
Re
Re
Re
Re
Re air
Replace DD motor,
Base assembly
Replace DD motor,
Base assembly
Re air
Note: * ~: Stand for the same as left.
-5-