Gestetner A193 Service Manual page 173

SERVICE PROGRAM MODE
Mode No.
Class
Class 3
1 and 2
Fusing
Control
Frequency
1-902
Display
Charge Roller
2-001 * Voltage
Adjustment
Leading Edge
Margin
1
(Printing)
Trailing Edge
Margin
2
(Printing)
2-101 *
Left Margin
(Printing)
3
Right Margin
(Printing)
4
LD Power
2-103 * Adjustment
Test Pattern
2-106* ID
Development
Bias
2-201 *
Adjustment
Number of
Copies After
2-213*
Toner Near
End Detection
Toner sensor
2-220 * Display
(A193)
Function
Displays the fusing control frequency
which is detected by the zero cross signal
generator. Display message: AC
frequency count.
Around "50" equals 50 Hz. Around "60"
equals 60 Hz.
Adjusts the voltage applied to the charge
roller.
Do not change the value.
Adjusts the leading edge erase margin.
The specification is 3 ± 2 mm. See
"Replacement and Adjustment - Copy
Image Adjustments" for details.
Adjusts the trailing edge erase margin.
The specification is 2 ± 2 mm. See
"Replacement and Adjustment - Copy
Image Adjustments" for details.
Adjusts the left side erase margin.
The specification is 2 ± 1.5 mm. See
"Replacement and Adjustment - Copy
Image Adjustments" for details.
Adjusts the right side erase margin.
The specification is 2 ± 1.5 mm . See
"Replacement and Adjustment - Copy
Image Adjustments" for details.
Adjusts the LD power.
Do not change the value.
Adjusts the image density level for black
pixels on test pattern printouts (made with
SP5-902).
Adjusts the development bias during
copying.
This can be adjusted as a temporary
measure if faint copies appear due to an
aging drum.
Selects the number of copies after toner
near-end has been detected.
Display message: Toner end count
Displays the TD sensor output voltage.
(VT)
ö
Press the key to exit the display.
4-8
Settings
-1000 ~ -2500
1 V/step
- 1750 V
0 ~ 9
1 mm/step
3.0 mm
0 ~ 9
1 mm/step
2.0 mm
0 ~ 9
1 mm/step
2.0 mm
0 ~ 9
1 mm/step
2.0 mm
-128 ~ +127
1 µW/step
- 103
0 ~ 255
1/step
255
-200 ~ -900
1 V/step
- 600 V
0: 50 copies
1: 20 copies
SM