Sharp 27DV-S100 - Troubleshooting Flowcharts (TV Section); Flowchart 1-1: Unit Does Not Turn On; Flowchart 1-2: General TV Section Troubleshooting

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27DV-S100 27DV-CS10
No turn on
System control(IC2001)
pin(36),(51),(73)= 5V ?
No raster
Check 5V regulator
(IC9021)
System control(IC2001)
pin(37),(38)= 14.32MHz ?
YES
System control (IC2001)
pin(25)= 5V ?
Replace IC2001
YES
NO
NO
NO
Check X7001
Check reset circuit
(IC2002)
System control (IC2001)
pin(1)= 60Hz signal ?
YES
System control (IC2001)
pin(4)(power control)=5V ?
pin(13)(TV power)=5V ?
(when turn on)
YES
YES
NO
NO
NO
Check TC detector
(IC901)
12V REG (IC9740)
pin(3)=12V?
YES
NO
Check IC9740 and 12V
line of TV power circuit
Error amp (IC9741)
pin(1)=130V ?
YES
Check deflection circuit
and FBT
YES
NO
Check 130V line and
other TV power circuit
Power control SW(Q9101)
and relay (RY9701) are
normal ?
Check power control
circuit and relay drive
circuit
+B voltage = 130V ?
(L9720)
RGB AMP (IC8850) bias
output from pin (9),(8),(7)?
Check TV power circuit
NO
RGB AMP (IC8850)
pin(6)=210V?
NO
Check HEATER line
NO
YES
Check CRT screen control
and FBT (T5603)
YES
Replace IC8850
YES
FLOW CHART No. 1-1 FLOW CHART No. 1-2
TROUBLESHOOTING FLOWCHARTS OF TV SECTION