5-25
Troubleshooting
Code Item Function Remarks
15-16 Not used
17 Grid standard voltage Adjustment of grid –2.28V
(standard = –810V) standard voltage. (–99 to +99)
18 Photo mode grid voltage Adjustment of photo –2.28V
(standard = –480V) standard voltage. (–99 to +99)
19 Bias standard voltage Adjustment of bias –2.1V
(standard = –250V) standard voltage (–50 to +50)
20 Not used
21 Toner density sensor Adjustment of toner 0.033V
gain voltage density sensor gain. (–49 to +54)
(standard = 6.51V) voltage
22–23 Not used
24 Copy density rank Adjust copy density rank (–99 to +99)
adjustment change for document
(D mode light side) mode (Light side)
25 Copy density rank Adjust copy density rank (–99 to +99)
adjustment change for document
(D mode dark side) mode (Dark side)
26 Toner density sensor Adjustment of toner 19.5mV
judgment voltage level supply starting judgment (–26 to +26)
(standard = 2.5V) voltage level.
27 Toner recycle switch
Adjustment of toner density
19.5mV (Except
judgment level sensor judgment level (–10 to +10) FP-7818/7824)
(Recycle or collection)
28 White density Adjustment of standard –30 to +40
adjustment* white density level*
29 Black density Adjustment of standard –99 to +99
adjustment* black density level*
30 Not used
31 Fuser temperature Adjustment of fuser 0.7 C
temperature. (–15 to +15)
(+): Lower
(–): Raise
32 Original density light peak The level is adjusted in 1%
of auto original density proportion to the (–99 to +99)
level difference between the
light peak and standard
level.
33~35 Not used
36 Registration of original Adjustment of registration 0.4mm (A888)
for the automatic document timing 0.65mm (A505)
feeder (–32 to +32)
(1-side original feeding)
* (for Qualitative Reasoning Based Adaptive Controller)
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