Print Quality - Ricoh B174 Service Documentation

4.3.3 PRINT QUALITY

Error Status
Vertical black line
and band
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Vertical white line
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B174T921.WMF
No image
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B174T922.WMF
Light image
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B174T923.WMF
SM
Check
1. Faulty toner cartridge
2. LSU
1. LSU window dirty
2. Toner cartridge
1. Is the seal tape removed?
2. OPC is properly
grounded?
3. LSU running well?
4. Toner low?
5. Is there video data from
the Main PBA?
1. Is the seal tape removed?
2. LSU light power normal?
3. Enough toner?
4. High charger voltage?
5. Lower bias voltage
6. Transfer voltage and roller.
7. Contamination of high
voltage contact.
4-7
TROUBLESHOOTING
Solution
1. Change the toner cartridge
2. Replace LSU
1. Clean the LSU window
2. If not the LSU, change the
toner cartridge.
1. Check and remove tape
2. Measure the resistance
between frame ground and
the OPC ground spring
attached to the frame.
Confirm good ground. If
faulty, check the ground
path through the frame.
3. Replace the LSU
4. Shake the toner cartridge
and print. If an image
appears, the toner cartridge
is empty
5. Print the engine test
pattern. If no pattern is
printed, replace the Main
PBA.
1. Check and remove tape
2. Checking LSU light power
is difficult. Compare with a
new one.
3. Check the toner counter
4~6. Change the HVPS (SMPS)
Board.
6. Clean or replace the transfer
roller.
7. Stray toner can increase
contact resistance and cause
a bad contact. Clean the
contaminated area.
B174