Adjustment; How To Select The Factory Adjustment (Factory) Mode; Selecting With Front Panel Switches; Adjustments Before Aging - NEC FP1355 Service Manual

2.4

Adjustment

2.4.1

How to select the factory adjustment (FACTORY) mode

2.4.1.1

Selecting with front panel switches

(1) Turn the power ON while holding down EXIT button.
(2) After step (1), release the button after one to two seconds, and press (-) button.
(3) Confirm that 255 is displayed for the counter of FACT DATA in MODE SELECT.
(4) Set to 05 with (+) button.
(5) When PROCEED button is pressed, the factory mode will be entered.
This factory adjustment mode is entered with the above steps.
*The factory adjustment mode remains valid even after the power is turned OFF.
Note that steps (3) to (4) must be carried out within ten seconds. If ten seconds are exceeded,
the mode will return to the user mode.
<Returning to the user mode from the factory mode>
(1) OSD (for factory, user select) is displayed with the group selection.
(2) Set the counter value of MODE SELECT to 010 with (-) (+) buttons.
(3) When PROCEED button (RIGHT side) is pressed, the mode will return to the user mode.
2.4.2

Adjustments before aging

Especially without any designation in each adjustment, full white signal of timing No. 12
(106.25k/85, 1600 x 1200) is input.
2.4.2.1

Adjusting the high voltage and high voltage protector

(Timing No. 25 (85Hz, 1800 X 1350) SYNC signal is only input-No Video signal)
(1) Turn the monitor power OFF and connect a high voltage indicator to the anode of CRT before turning
the monitor power ON.
(2) Select MODE SELECT on OSD and set to 250 using (-) button before pushing PROCEED
button.
(3) Select HVADJ on OSD to adjust the high voltage to 27.0kV ± 0.3kV.
(4) Turn XPRO 31K ON with OSD, and make sure that the high voltage reaches to 30.8kV ± 0.7kV.
Note) Adjustment (3) and (4) should be made with the screen VR turned all the way down
counter-clockwise (show the FBT potentiometer picture from page 2-16 of this manual here).
2.4.2.2

SCREEN voltage / FOCUS adjustment

(Input the timing No.12 (106.25kHz / 85Hz, 1600 X 1200) crosshatch signal)
(1) Connect a high voltage meter to the TP-SC terminal on the CRT PWB.
(2) Set to 700V±5V with the FBT picture potentiometer.
(3) Adjust the focus pack "FOCUS 1, 2" so that both edges of the picture are clear.
2.4.2.3

Shock test

(1) Display the "color bar".
(2) Confirm that there is no abnormality in the image when shock is applied on the monitor.
2.4.2.4

Preadjustment before aging

(1) Display a "full white".
(2) Confirm that the R, G and B channel images are output.
(3) Confirm that the HORIZ-PHASE (VR), picture position, picture size, PCC and balance can
be controlled, and approximately adjust.
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