Trouble Analysis Table - Panasonic JU-475-4 Service Manual

6.3 Trouble Analysis Table
Table 6-2 Trouble Analysis
men] vm — [s] — — G —
Index detection failure | 1 |Colletpartfaulty
Drive motor control PCB
Drive motor fault
ndex LED faulty
ndex detector fault
ndex LED/index detector installation faulty
PCB motor on circuit
PCB index detection circuit
See Item 1.
PCB disk change / ready / Media in / Media out ciuciit
Track 0 assembly
PCB track 0 detection failure
See item 1.
See Item 2.
Head load solenoid
PCB head load circuit
Stepper motor
Guide shaft contamination or damaged
PCB stepper driver circuit
See Item 1 .
See Item 4.
Head disconnected
Head shorted
Head load bail height wrong
PCB write circuit
See Item 1.
See Item 4.
See Item 6.
PCB read circuit
See Item 1.
See Item 4.
See Item 7.
Alignment
Azimuth
Index burst
Asymmetry
Limiter
Track 0
Head load time
Index period
PCB read circuit
LED part
PCB IN USE circuit
Write protect part
Write protect circuit
w
VO 34pin signal failure 1
Track 0 detection failure
No head loading
|
I Read error
— å | a
won't light
Write protect
failure
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