SAMSUNG PROJECTION TV SERVICE GUIDE
Section 3 -
Flow Charts
Last update: 4/18//01
video repair flow chart
"missing"
change power pcb
"missing"
change main pcb
"missing"
change power pcb
"8, 12, 13.5 and 15.5 volts ok"
replace LCD control pcb
"3 volts ok"
LCD drive voltages, CNL03 pins 2, 4, 6 and 8
pin 2 = 8 volts dc, pin 4 = 12 volts dc,
pin 6 = 13.5 volts dc, pin 8 = 15.5 volts dc
"8, 12 and 36 volts ok"
CNL01 pins 2, 4 and 6
all pins should measure 3 volts dc
video power supply
AP2 pins 3, 6 and 8
pin 3 = 8 volts dc, pin 6 = 12 volts dc
pin 8 = 36 volts dc
power repair flow chart
"missing"
check or change switch
"missing"
change power pcb
"4 volts missing"
change main pcb
"lamp ok"
ballast pcb needs to be replaced
must replace complete optical engine
"4 volts dc ok"
replace lamp
"P803"C" 170 volts dc ok"
AB1 pin 3, 4 volts dc, after pressing power button
lamp should lite after 5 seconds
"5 volts ok"
P803"C" 170 volts dc
switch detect
switch is closed
AF1 pin 3, 5 volts
