NEC MultiSync FP1370 Service Manual page 58

7. Focus Adjustment
Signal: No.23 (1600*1200@85Hz) Window Pattern (H:33% V:33%)
No.31(1600*1200@60Hz)Cross Hatch Pattern " ヨ " Character
No.33(788*1200@75Hz) Cross Hatch Pattern
PC
*PC Focus Check Pattern
Video Board: Millennium ||
Application: Excel (Microsoft)
Font: Arial
Font Size: 8
Character: ##&&%%$$##
※ After maximum horizontal amplitude adjustment, maximum vertical amplitude adjustment, and video
adjustment are completed, perform this focus adjustment.
For steps of 8) , 9), 14), 15), adjust it with signal input through BNC using signal generator VG-819 or
alternate.
※ "CONTRAST" of the user menu and "BRIGHTNESS" are set up.
BNC input
D-SUB input
As for 1)-3), it applies to A version only.
1) Receive Signal 23.
2) Open Menu (S), TAG D "CONTRAST PRESET".
3) Adjust "+", "-" SW so that the "window brightness" is 90(+0, -1) cd/㎡.
4) Receive Signal 31.
Open Menu (S), TAG2 "H.SIZE", "V.SIZE","H.POSITION", "V.POSITION".
Adjust the picture size and position as listed below by "+", "-" SW.
Picture size
Picture Position
5) Open Menu (S), TAG1 "V.D.FOCUS".
Adjust the voltage at TP-DF on the SW/HV PWB to obtain the following values.
The waveform of the TP-DF on the SW/HV PWB is observed, and the amplitude of parabolic-wave of
the vertical period is adjusted to 185±5Vp-p with "V.D.FOCUS".
Note: When measuring Vp-p, use a 100:1 probe with capacitance of approx. 2pF.
6) Open Menu (S), TAG1 "H.D.FOCUS", and confirms that data are "210".
* When data are different, a " H.D.FOCUS " will be displayed, adjusted to "210".
7) "EXIT" Switch is pushed, and data is saved in the memory.
8) Receive Signal 31 (1600*1200 (60Hz) cross-hatch pattern (green monochrome)) by BNC input, Menu
(U), TAG1 of "CONTRAST" and "BRIGHTNESS" are set up in " PRESET ".
9) The halo level is down with FOCUS VR F2 of FBT, and adjust so that vertical line may become thin in
the center of the screen.
10) Receive Excel of PC (Focus check pattern (1280*1024@85Hz) by D-SUB input, Hereunder setting is
done in the user menu.
CONRAST：MAX.
：396mm±1mm V.SIZE
H.SIZE
Excel Focus Check Pattern *(1600*1200@85Hz)
：CONTRAST - PRESET
：CONTRAST - MAX.
H: 396±1 mm
V: 297±1 mm
H: | XL – XR
eft
V: | XT – XB
op
BRIGHTNESS：PRESET (Menu (U), TAG1)
BRIGHTNESS - PRESET
BRIGHTNESS - PRESET
| " 1.0 mm
ight
| " 1.0 mm
ottom
：297mm±1mm (Menu (U), TAG2)
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