Picture Adjustment; Power Management - NEC FP1355 Service Manual
High resolution display monitor
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Also See for FP1355:
- User manual (144 pages) ,
- Dimensional drawing (1 page) ,
- User manual (20 pages)
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1.7.4
Picture adjustment
(1) The monitor has the function to do the picture adjustment with OSD and communication.
The function has the following adjustment modes.
a: Normal mode
b: Factory mode
For entry into each adjustment mode, refer to Item "Adjustment method".
(2) High voltage adjustment supplement
High voltage under normal conditions is decided by "HVAD" setting value of OSD adjust-
ment item, and X-ray protect voltage is decided by "XPRO" setting value of OSD adjust-
ment item. For X-ray protect voltage, the calculated value is set inside the microcomputer
by executing XPRO CALIBRATE with the input frequency 32kHz or less.
(3) If XRAY-PROTECT activates even in the normal state because XRAY-PROTECT is exces-
sively lowered by mistake, the XRAY-PROTECT and HV-ADJUST adjustment values can
be initialized using the following procedure.
(a) Input the image signal to the monitor.
(b) Keeping both + and - buttons pressed, turn ON the power.
(c) Keep both + and - buttons pressed for approx. 30 seconds or more.
(d) Release - button only.
(e) Keep the + button only pressed for 15 seconds or more.
(f) When it is successfully completed, LED gets green in a flash.
(g)Turn OFF the power, and turn it ON again, and the XRAY-PROTECT adjust
ment value will become 254 and HV-ADJUST adjustment value will become 0.
(4) Vertical position adjustment supplement
The displayed adjustment data corresponding to the vertical position icon in OSD adjust-
ment item differs at Normal and Factory mode.
Normal mode ("VERT-POSITION"):
When this icon is moved, the trapezoid distortion compensation is automatically
carried out. This is mainly used for compensating the distortion against the vertical
position of the input timing image.
Factory mode ("PF"):
The trapezoid distortion compensation is not carried out automatically even if this
icon is moved. This is mainly used for compensating the offset of the circuit and
deflection yoke.
1.7.5
Power management
The function reduces the power consumption of the monitor when the connected computer is
not used.
The function is turned ON and OFF from the adjustment picture.
The monitor has only one kind of the power management function.
(1) Conditions to enter power management mode
a: "POWER SAVE" of the picture adjustment item is left ON.
b: Neither HSYNC nor VSYNC are input.
(2) Power management operation
When the power management is activated,
(i)
P_SUS signal is turned to LO to stop the power output on the secondary side
except CRT heater, P-OFF+5V, +5V line.
(ii) P-OFF signal is turned to LO to stop the power output of P-OFF+5V line.
(iii) The front LED is lit orange.
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