Sharp 27DV-S100 Service Manual page 59

Vertical Out Protect (Check when power on)
YES
System control (IC2001) System control (IC2001)
V-pulse input to pin(45)? pin(97) = over 3.5V?
NO
Vertical out (IC5601) D5625 cathode H-pulse
V-pulse output from pin(3)? output from FBT?
NO YES
Q5612 base
H-Pulse output from
T5602 pin(4)?
Video-chroma (IC4401)
H-Pulse output from
pin(23)?
Check Video-chroma
circuit and replace
IC4401
Check between IC5601
to IC2001
YES
Def. processor (IC5602) Check between
V-Pulse output from pin(9)? IC5602 to IC5601
NO
YES
Video-Chroma (IC4401) H- Check between
IC4401 to IC5602
Pulse output from pin(23)?
NO
FLOW CHART No.1-7
YES
Replace IC2001
NO
YES
Check between
D5625 and IC2001
NO
YES
Check FBT and
C5633/C5639
NO
YES
Check between
IC4401, Q5608
and T5602
NO
(Check when power on)
TV Power Short Protecto
YES
System control (IC2001)
pin(86) = 0V("L")?
NO
YES
Short protector drive
Q9752 collector = 0V?
NO
YES
27V Line
D9751 cathode = normal (27V)?
NO
YES
16V Line
D9752 cathode = normal (16V)?
NO
YES
8V Line
D9755 anode = normal (8V)?
NO
Check 130V line and peripheral
circuit
FLOW CHART No.1-8
Check or Replace IC2001
Check between Q9752 and
IC2001
Check 27V line and IC6351
Check 16V line and 12V
regulator IC9740
Check 8V line and 5V
regulator IC1902