Xerox 7750DXF - Phaser Color Laser Printer Service Manual page 63

If the ADC Shutter Fail test detects a problem, check the connector and the shutter for
a binding or out of position condition. If these actions do not resolve the problem,
replace the MOB Assembly.
If the following values all equal none, the test has detected no problems
LD Illum Warn = None
ADC Patch Fail = None
VBCR Warn = None
V Bias Warn = None
If Ave RADC Trans is within +/-20 of RADC Target, then printer logic assumes the
density is correct. Values on the front panel are:
Front Panel Message
[YMCK] RADC Target = [XXX]
Ave RADC Trans = [within +/-20 of RADC Target]
Ideal LD Ill = [XXX]
V Bias = [XXX]
V BCR = 0
Theory of Operation
Typical Values
[YMC] 375-394 [K] 460
[YMC] 369-393 [K] 467
[YMC] 335-361 [K] 394
887
0
2-27