Analysis Of T&D Printouts; Printing Adjustment Printout (T&D 9); Fig. 5.6 Pattern For Printout T&D9 Of Standard Model (Reduced) - CPG Compuprint SP 40 Maintenance Manual

Maintenance Manual
5.10 Analysis of T&D Printouts
5.10.1 Printing Adjustment Printout (T&D 9)
In this test the printer prints three black patterns and with the edge sensor checks and automatically
adjusts the following parameters:
The standard A4 paper must be loaded.
If loading fails the message of " Waiting for key or paper" as indicated in operator message status table 5.2.
If the o.p. with display or line monitor is used the message will be "REMOVE PAP->KEY".
The operator has to remove the paper and push any key to confirm the operation.
The printer adjusts the sensors S1 through S6.
At the end the printer enetr in the message of "Waiting for paper loading" status as indicated in table 5.2 or shows
"LOAD PAPER" message to display.
After the paper loading, the carriage and the paper are moved in a proper position and the S8 pwm adjustment and
the white threshold calibration are executed (White).
Furthermore is check the difference between the white and black level must be at least 200 steps.
If during this phase, the pwm adjustment of the S1 tru S6 sensors is not jet done, the paper is completely feeded
rearly of the the sensors (eject from the rear) and the adjustment is done.
The paper is frontly parked and reloaded utilizing the adjusted sensors.
Three squared mark are printed respectively in the left, middle and right position of the sheet (A1, B1, C1) with
carriage moving from left to right and then three more squared mark are printed respectively in the left, middle and
right position of the sheet (A2, B2, C2) with carriage moving from right to left as indicated in figure 5.4.
After this, using the S8 sensor these adjustments are automatically done:
First printing row (F. Col.)
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First printing colunm (F. Lin)
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- Alignment check (L/R)
This is the difference between the upper edge and the markers A1 and C1 less than 10/180"= 1,4mm.
Bidirectional printing check (Bid.)
-
This is the skew between B1 and B2 and set for the best value.
At the end of the test the following printout is done in which there are printed :
The S8 medium values for printed Black, White and Platen black check.
-
- The old and new values for the four adjustments above described in the first line
The pwm adj for the S1 to S8 sensors in the second one.
-
After all the paper is automatically ejected.
Rev. 005
Fig. 5.6 Pattern for Printout T&D 9 of Standard Model (reduced)
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SP 40
Chapter 5
Test & Diagnostic