Daewoo 531X service manual No Raster

2. No Raster

No Raster

Is CRT		No			Is Heater		Yes	Trouble in
				Voltage (CRT PWB)
heater red-hot?								CRT
					about 6V?
	Yes					No
Turn the Brightness					Trouble in		Refer to trouble in
& Contrast control					power supply		power supply unit.
to set Maximum					circuit
	Yes
Is whole			No
					Trouble in power
screen bright?
					supply circuit
	Yes

Check		No
G1 voltage about
-60V?
	Yes

Is CRT

G2 (screen) voltage No about 730V?

	Yes
Is 100Vdc		No
line normal?

Yes

Does

the Brightness control No make screen

bright?

Yes

Raster OK

Trouble in G1 line

Trouble in FBT or its pin4 ambient circuit

Trouble in 100Vdc	Refer to trouble
line of power
	in P.S.U
supply unit

High Voltage trouble in FBT

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