Kortek corporation
64
of
99
PDP R&D Center
10.2.1 No Video (The 1
st
type)
(Operating Voltages exit, but an Image doesn’t exist on Video).
① Y-
Buffer
②Y-
Buffer
[ Y-Main]
Check Scan Buffer
output-3rd,4th pin
CN5406, 5506(13Pin)
Check STV7617 logic signals
CN5404,5405,5506,5505(12Pin)
Check Output signals (Out” L,H)
Y-MAIN
O.K
Y-MAIN
Y-MAIN
Y-MAIN
Check output(2,4,6,8,10,12) pins of
the IC5005/7404
Check output(3,5,7,9,12,14,18)Pins of
the IC5006,5007/LV244
Check input(2.4.5.8.9.12)Pins of
the CN5002/CON_30Pin
NG
OK
OK
After check
coldsoldering
& Pin shorting,
Replace the IC
M5003/IRF540A
Check FET/GATE-WAVE
R5008/4.7Ω
Check Vscan-voltage(79V)
NG
NG
OK
Check input voltage(5th-pin(Vscan))
of the CN5008/CON_13Pin
NG
Y-MAIN
Y-MAIN
Y-MAIN
Replace
the FET
Y-MAIN
Y-MAIN
Y-MAIN
NG
NG
NG
NG
OK
OK
OK
OK
OK
Check S/W_FET/ GATE-WAVE
(Yrr.Yr.Yfr.Yf.Ys.Yg.Yp)
Check input
(21.22.24.25.28.29.30)pins
of the CN5002/CON_30pin
Check Input voltage(1(Vdd).3(Vcc).7(Vset).
11(Vs).12(Vs).13(Vs))pins of the CN5008/CON_13pin
☞ In checking input or output pins,
Check “No solder/Cold solder/Lead bent” on Connector Leads
Содержание P42SV
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