Ricoh A172 - Page 479

RICOH GROUP COMPANIES
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SUBJECT: BANDING TROUBLESHOOTING GUIDE
Scope:
This Technical Service Bulletin was designed to assist in quick identification and resolution of operator to
non-operator direction banding. This Technical Service Bulletin is divided into 3 sections. See below:
1.
Random Banding:
Bands can appear in random areas of the copy/print and can be
random widths.
2.
Fixed Banding:
Band will appear only in one specific area measured from the lead edge of the
copy/print.
3.
Pitch Banding:
Bands appear on the entire length of the copy/print and are the same width and
the same distance apart.
RANDOM BANDING:
Possible Causes
Possible Solutions
1.
Discharge Rollers in Transfer Belt Unit is
not grounded.
1.
Replace Bushings (AA084044) or Ball Bearings
(08053482). Check resistance from Discharge
Roller to frame.
2.
Poor Drum Ground.
2.
Reform internal Drum Ground Contacts/Replace
Drum Shaft Holder (A1094653).
3.
Transfer Belt receptacle (AD021103)
random HV leak.
3.
*Insufficient or too much conductive
grease/receptacle failure.
4.
Transfer Roller receptacle (AD021095)
Random HV leak.
4.
*Insufficient or too much conductive
grease/receptacle failure.
5.
Transfer belt drive coupling is loose.
5.
Tighten the set screw on the Transfer Belt Unit drive
coupling.
6.
Transfer belt drive coupling.
6.
Spring-loaded area is bound and not engaging
properly.
7.
The inside of the Transfer Belt is dirty.
7.
Clean the inside of the Transfer Belt.
8.
Dirty Transfer Unit Drive Rollers.
8.
Clean Transfer Belt Unit Drive Rollers.
9.
Improper timing pulley tension (AB030445).
9.
Loosen then tighten the pulley set screw.
(allows the spring to set the tension)
10.
The timing pulley is binding.
10.
Lube timing pulley (AB030445) or replace.
11.
The Tightener Bracket is bent.
11.
Replace the Tightener Bracket (A1094676).
12.
Transfer Roller Bias is improperly set.
12.
Set Transfer Roller voltage as per factory data
sheet.
13.
The Transfer Roller is worn.
13.
Replace the Transfer Roller (A1096200).
*
NOTE:
Do not put conductive grease in the receptacles.
Only put a small amount of conductive grease on the end of the Transfer Rollers/Sleeve Rollers.
Continued…
Note:
This copy is intended as a master original
for reproduction of additional bulletins.
„
COPY QUALITY
CONTROL NO. 319