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1-2 ADJUSTMENT PROCEDURE for VIDEO
BOARD
The INPUT signal is to be the COLOR BAR
(VIDEO A) input unless otherwise specified ..
(1) Items Checked
i) Set all the VRs on the VIDEO BOARD to the
center position and attach the VIDEO BOARD
to the main body of the monitor..
ii) Connect the specified cables to the connectors
on the PC board respectively.
(2) Operation
i) Connect the, AC cable after connecting the
signal cable and tum the POWER switch on.
ii) After turning the POWER switch on, make sure
that no trouble are found.
Then, set the SCAN switch to "NOR" position
and obtain a synchronization by VR901 (H
HOLD) and VR902(N V HOLD) for NTSC/
VR401(P V HOLD) for PAL and next, adjust
the HEIGHT and WIDTH using VR905(NOR
HEI) on the VIDEO BOARD and VR202(NOR
WIDTH) on the DEF & POWER BOARD in
order to let the proper pictures appear on the
screen.
(3) Waveform Check(Pulse System)
i) Check the waveforms at the following TPs.
• TP702(HD)
i
9 . .7µs
10.0Vp-p
• TP703(BP.CLP.P)
4.5µS
10.5Vp-p
• TP705(CHROMA .. S.C.P)
!H
rate!
3.3µs
i
10 .. 0Vp-p
- 5 -
1..
• I
]2
5Vp-p
~
• TP706(VIDEO.S.C . .P)
IH
rate!
3.3µs
• TP707(VD)
1.0ms
• TP708 (BKG VD)
0.25ms
· I I·
r
10.0Vp-p
t
11.5Vp-p
7 17
r11.5Vpp
LJ
LJ_[
j.
1V
,
I
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