Ricoh RTB-001 Technisches Bulletin - Seite 6

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RICOH

Model:

Skylark

Page 7-3

1.2 DIRTY BACKGROUND

"Possible Causes" should be corrected as follows. Item No. 5 has been eliminated

since this copier does not use a fiber optics cable for the ADS sensor.

-Possible Causes-

1. Dirty optics

2. Toner scattering

• High toner density

• The inlet seal of the development unit is stripped off.

• User/SP mode setting error

3. The exposure lamp is not bright enough. This may be caused by deterioration of the

exposure lamp or low lamp voltage.

4. In ADS mode, light reflected from the original is too intense.

5. The development bias is grounded.

Page 7-4

1.2 DIRTY BACKGROUND

The last paragraph of "Action " should be corrected as follows.

If dirty background occurs only in ADS mode, do the following:

• Clean the optics and perform the necessary SP modes in order

(see Section 4 - Service Remarks for details)

• If the signal at CN112-3 stays HIGH, check the harness and sensor, and replace any

defective parts.

• If the signal at CN112-2 stays LOW, replace the main board.

echnical

ulletin

Date:

15-Apr-97

PAGE: 2/3

No: