Ricoh RTB-001 Buletin Teknis - Halaman 5

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Halaman Cetak
RICOH
Model:
Skylark
Subject:
ADS Adjustment Procedure
From:
QAC 1st Field Information Dept.
Classification:
Please correct your Service Manual as follows:
Page 6-41
*: Changed or Newly Added parts
7.6 ADS Adjustment
When:
Purpose:
Adjustment
Standard:
Method:
How it works:
1. Place 5 sheets of A4 paper on the exposure glass.
2. Access SP56. The ADS sensor output is displayed.
*3. Adjust to 2.5+-0.2 V by turning VR100 on the main board.
*NOTE:
1) SP56 should not be used for observing the output value. The standard setting
inside the EEPROM is overwritten when this SP mode is accessed.
2) The machines from the factory may not always be within 2.5+-0.2 V. This is not a
problem. When adjusting in the field, adjust it to the value described above.
- Reasons for correction -
1. Note 1 has been added to make sure that SP56 (ADS Adjustment) is used to memorize
the adjustment standard value, not for checking the output value.
2. VR101 should always be adjusted after opening SP56, to adjust the voltage to the
standard value.
3. To perform SP56, the Start key does not have to be pressed.
T
echnical
Troubleshooting
Mechanical
Paper path
Other (
)
1. After light intensity is changed
2. Image density in ADS mode is too light or too dark
To maintain correct ADS mode operation.
ADS Voltage = 2.5 +-0.2V
SP56 and VR100 on the main board
The bias voltage thresholds which correspond to image density will all change.
B
ulletin
Date:
15-Apr-97
Prepared by:
Checked by:
Part information
Electrical
Transmit/receive
PAGE: 1/3
No:
4
M. Ishihara
T. Inoue
Action required
Service manual revision
Retrofit information