Ricoh G179 Service Manual page 173

Defective harness
Defective IOB
ID sensor pattern test error
One of the following readings occurred 10 times in the ID sensor output when
the ID sensor pattern was checked:
1) Vsp ≥ 2.5V
2) Vsg ≤ 2.5V
3) Vsp =0V
350 D
4) Vsg = 0V
ID sensor connector defective
Poor ID sensor connector connection
I/O board (IOB) defective
Poor writing of ID sensor pattern on the drum
High voltage supply board defective
ID sensor Vsg test error
When the ID sensor was checked, the ID sensor output voltage is 5.0V while
the LED current value is 0.
351 D
ID sensor defective or dirty
ID sensor connector defective
Poor ID sensor connection
I/O board (IOB) defective
Defect at the ID sensor pattern writing area of the drum
Grayscale measurement error
When the grayscale control result is the maximum and it does not operate
correctly and these cases are detected 15 times.
355 C
ID sensor defective or dirty
The life of ID sensor or photo conductor
Shield glass dirty
SM
CÓPIA NÃO CONTROLADA
4-7
CÓPIA NÃO CONTROLADA
SC Tables: SC3xx
G179