4-12 Phaser 7750 Printer Service Manual
ADC Output Check Measuring:
Result = 0
Stop Status = 0
ADC Sensor Fail = 0
ADC shutter Fail - 0
This tests the Automatic Density
Correction sensor.
Tone Up/Down Measuring:
Result = 0 Status = 0
ATC Sensor Fail = None
ATC Limit Warn = None
ATC Change Warn = None
This tests the Automatic Toner
Calibration sensor.
Laser Power Check Y=OK M=OK C=OK K=OK
YMCK=OK
YMCK(CycUp)=OK
This tests the laser output.
PWM Mapping Data
Read
Coarse RegiCon Init See "Coarse RegiCon Initialization"
on page 6-12.
Maintenance Engine maintenance functions
Clean Fuser Fuser Cleaning Sheets Runs five sheets of paper through
the fuser from the default tray.
Clean Accumulator
Belt
Do you wish to continue?
Yes
No
Motor On
Motor Off
Please cycle power to the
printer now!
CAUTION To avoid damaging the
Accumulator Belt, it is
recommended that you
leave the belt cleaner
installed and perform the
Belt Edge Learn test
instead, see "RegiCon #1
Fine Skew Adjustment" on
page 6-7.
NVRAM Access You can read or reset, selected NVRAM address locations. For all NVRAM
access tests, see "Service Diagnostics NVRAM Resets" on page 6-19.
PostScript NVRAM
Reset
See "Service Diagnostics
NVRAM Resets" on
page 6-19.
Clear Tech Rep
Faults
Clear <4-36>
Clear <9-380 ~ 9-383>
Clear <9-654>
Clear <9-910 ~ 913>
Clear <10-348 & 10-350>
Error Code 30
Error Codes 12, 13, 14, & 15
ADC Sensor Error
Imaging Unit type mismatch
Error Codes 40 and 44
Reset CRU Life
Counters
Resets the life on individual
routine maintenance items.
Reset Engine
NVRAM
**Writes data to Eng NVM**
Are you sure?
Yes
No
This writes data from the
hard drive to the engine
NVRAM.
See "Resetting Engine
NVRAM" on page 6-17.
Test Front Panel Display Test Operation Definition
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