Toshiba DP120F, Service Manual

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DP120F/DP125F Troubleshooting 11-64 March 2000 © TOSHIBA TEC
4.3.9 “DEVICE ERROR 22 to 25”
4.3.8 “DEVICE ERROR 21”
Check points
Are the terminals contacting between the
LSU and top of the Drum unit dirty or de-
formed.
Is the cable firmly connected to the Mother
PBA (CN12), between the Mother PBA
(CN24) and the Main PBA (CN12)?
When no problem is found in steps above,
the Drum unit itself, the Main PBA or the
Mother PBA may be defective.
Solutions
If dirty, clean them. If deformed, replace
the LSU.
Insert the cable to the connector firmly.
Replace in the order of: Drum unit, Main
PBA, Mother PBA.
Step
1
2
3
4.3.7 “CONFIRM DEV. UNIT”
Check points
Are the terminals contacting between the
LSU and top of the Drum unit (discharge
lamp contacts.)
Is the cable firmly connected to the Mother
PBA (CN12), between the Mother PBA
(CN24) and the Main PBA (CN12)?
When no problem is found in steps above,
the Drum unit itself or Main PBA be de-
fective.
Solutions
If dirty, clean them. If deformed, replace
the LSU.
Insert the cable to the connector firmly.
Replace in the order of: Drum unit, Main
PBA, Mother PBA.
Step
1
2
3
Check points
Is the cable from the Fuser firmly con-
nected to the LVPS (CN3), between the
Mother PBA (CN24) and the Main PBA
(CN12)?
Is the cable from the Fuser firmly con-
nected to the Mother PBA (CN4), between
the Mother PBA (CN25) and the Main PBA
(CN13)?
When no problem is found in the steps
above, the Fuser itself, the LVPS, or the
PBA's may be defective.
Solutions
Insert the cable firmly.
Insert the cable firmly.
Replace in the order of: Fuser, LVPS, Main
PBA, Mother PBA.
Step
1
2
3