Troubleshooting By Banding Type - HP Indigo press 3050 Troubleshooting Manual

Troubleshooting by banding type

Troubleshooting Repeatable banding with Non-mechanical causes
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The banding cause is probably not mechanical:
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This is because the TS_1on_3off vertical lines job is not sensitive to mechanical banding.
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But sometimes the cause could still be mechanical, caused by pressure variations. For example
BID pressure, 1
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The same banding appears at the same places on both jobs:
Figure 5 TS_1on_3off horizontal lines
Troubleshooting:
Work through the "Troubleshooting checklists" in the "Banding troubleshooting road map"
on page 7, for the following banding causes: Electrical, Consumables or LUT.
Troubleshooting Constant banding with Mechanical causes
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The TS_1on_3off horizontal lines job has your specific banding, but the TS_1on_3off vertical
lines job does not at all or has much less:
Figure 7 TS_1on_3off horizontal lines
The banding cause is probably mechanical
(due to velocity changes or image writing placement problem or image transfer).
Troubleshooting:
1. Measure the distance from the leading edge of the sheet to the banding.
2. Check if the banding is in the "Appendix 4 Constant banding table" on page 21:
•
•
10 Banding troubleshooting
st nd
or 2 pressure.
(has banding)
If the banding is in the table, perform the relevant "Diagnostic tips" on page 21.
If not, the cause is probably defective or dirty gear teeth – see "Appendix 5
Troubleshooting constant banding caused by gear teeth" on page 22.
Figure 6 TS_1on_3off vertical lines
Figure 8 TS_1on_3off vertical lines
(has no banding)
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