Development; Toner Supply; Transfer And Separation; Cleaning - Ricoh FT4430 Service Manual

16 April '88

4. Development

Be careful not to nick or scratch the development roller sleeve.
1.
2. Place a sheet of paper under the development unit when it is out of the
copier.
3. Be careful not to bend the bias terminal.
4. Clean the drive gears and end magnets after removing used developer.
5. Clean the development unit guide plate before reinstalling the unit.

5. Toner Supply

The image density sensor and the pre-transfer lamp unit should be clean-
1.
ed with a blower brush.
2. Do not touch the sensor pattern with bare hands.
3. Image density sensor adjustment is required when:
The ID sensor/PTL board is replaced.
The main board is replaced.
The drum has been replaced and Vsg is out of specification.
Problems with toner supply have occurred and ID sensor check shows
Vsg to be out of specification.
4. Grease the toner supply clutch with Mobil Temp 78 periodically to avoid
noise and faulty operation.

6. Transfer and Separation

The corona wires should be cleaned with a dry cloth.
1.
2. While the drum stay is out and the drum is installed on the drum guide,
do not lift up the corona unit. (The corona casing will knock against the
drum.)

7. Cleaning

1. When servicing, be careful not to damage the edge of the cleaning blade.
2. Do not touch the cleaning brush with your bare hands.
3. Before pulling out the cleaning unit, place a sheet of paper under it to
catch falling toner.
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