Ricoh A077-29 Bollettino tecnico - Pagina 10

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Ricoh A077-29 Bollettino tecnico
SUBJECT: Service Manual Correction
PREPARED BY: S. Orita
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
Please correct your service manual as follows:
1. Service Manual Page 2–31 (Base Bias Voltage at ID level 5)
The correct base bias voltage at ID level 5 is 160 volts. (200 volts is incorrect.)
Please replace the first table on page 2–31 of the service manual with table below
Manual ID Level
Base Bias Voltage (volts)
Exposure Lamp Data
Grid Voltage (volts)
Vo: Exposure Lamp Data for ID level 4 (SP48)
Vg: Standard Image Grid Voltage (–680 volts)
2. Service Manual Page 2–18 (Sensing measurement for ADS mode)
(The correction is bolded)
1. Sampling starts 10 millimeters
from the leading edge of the
original and continues for 40
millimeters from the leading edge
of original in full size mode.
40 mm
2. b=
Reproduction Ratio (%)
Technical Bulletin
Revision of service manual
Information only
Other
Darker
1
–120
–160
Vo –4
Vo –4
Vg ±0
Vg ±0
Incorrect
x 100
FROM: Copier Technical Support Section
2
3
4
–160
–160
Vo ±0
Vo –2
Vg ±0
Vg ±0
1. Sampling starts 10 millimeters
from the leading edge of the
original and continues for 50
millimeters from the leading edge
of original in full size mode.
2. b=
Reproduction Ratio (%)
Reissued on: August 31, '92
No. RTB-005
DATE: July 15, '92
PAGE: 1 of 4
MODEL:
E7 Series
(A076/A077/A078)
5
6
–160
–200
–240 *Note
Vo +2
Vo +2
Vg ±0
Vg +50
Vg +50
Correct
50 mm
x 100
Lighter
7
Vo +4