Kortek corporation
70
of
99
PDP R&D Center
10.3.1 Abnormal Video (The 1
st
type)
(Abnormal Image is on Video.(except abnormality in Sustain or Address))
Rising SW
Falling SW
Output of IC5005
The slope of
Rising/Falling
Output of L-Out
3th-pin output of
LV244A
[ Y-MAIN ]
Check Y-Buffer output,
Scan output &
Control signals
Y-Buffer
CN5406,5506(13pin)
Check input sinals of STV7617
Y-MAIN
Y-MAIN
Y-MAIN
O.K
Check scan output-Waveform
(M5003 Gate)
Check signal(VR5001,5002)
rising/falling slope
Y-MAIN
Y-MAIN
Replace the
FET(IRF540A)
Adjust the slope
Y-MAIN
Y-MAIN
After check
coldsoldering,
Pin-shorting,
Replace the IC
After check
coldsoldering,
Pin-shorting
Replace the IC
Check output(2.4.6.8.10.12)pins
of the IC5005/7404
Check output(3.5.7.9.12.14.16.
18)pins of the IC5006,5007/LV244
Check input(2.4.5.8.9.12)pins of the
CN5002/CON_30pin
Check scan Input-voltage of the
R5008(4.7Ω)/CN5008(5th-pin)
OK
NG
OK
OK
NG
NG
NG
NG
OK
NG
NG
OK
IC5006,5007(LV244A) 3th,5th output-WAVE
IC5006,5007(LV244A) 7th,9th,12th output-WAVE
☞ In checking input or output pins,
Check “No solder/Cold solder/Lead bent”
on Connector Leads