Sharp 27DV-S100 Service Manual page 56

No turn on
NO
System control(IC2001)
Check 5V regulator
pin(36),(51),(73)= 5V ?
(IC9021)
YES
NO
System control(IC2001)
Check X7001
pin(37),(38)= 14.32MHz ?
YES
NO
System control (IC2001) Check reset circuit
pin(25)= 5V ? (IC2002)
YES
NO
System control (IC2001) Check TC detector
pin(1)= 60Hz signal ? (IC901)
YES
YES
System control (IC2001)
Power control SW(Q9101)
pin(4)(power control)=5V ?
and relay (RY9701) are
pin(13)(TV power)=5V ?
normal ?
(when turn on)
NO
12V REG (IC9740)
pin(3)=12V?
Replace IC2001
Error amp (IC9741)
pin(1)=130V ?
Check deflection circuit
and FBT
FLOW CHART No. 1-1
NO
Check power control
circuit and relay drive
circuit
YES
NO
Check IC9740 and 12V
line of TV power circuit
YES
NO
Check 130V line and
other TV power circuit
YES
No raster
NO
+B voltage = 130V ?
Check TV power circuit
(L9720)
YES
NO
RGB AMP (IC8850) bias
RGB AMP (IC8850)
output from pin (9),(8),(7)?
pin(6)=210V?
YES
Check CRT screen control
Replace IC8850
and FBT (T5603)
FLOW CHART No. 1-2
NO
YES
Check HEATER line