Sharp 27DV-S100 - Troubleshooting Flowcharts (TV Section) (Continued); Flowchart 1-7: Vertical Out Protect Issues; Flowchart 1-8: TV Power Short Protection

59
27DV-S100 27DV-CS10
Vertical Out Protect
NO
YES
YES
System control (IC2001)
V-pulse input to pin(45)?
System control (IC2001)
pin(86) = 0V("L")?
Check or Replace IC2001
Vertical out (IC5601)
V-pulse output from pin(3)?
System control (IC2001)
pin(97) = over 3.5V?
Q5612 base
H-Pulse output from
T5602 pin(4)?
Check between
D5625 and IC2001
NO YES
Def. processor (IC5602)
V-Pulse output from pin(9)?
(Check when power on)
TV Power Short Protecto
(Check when power on)
YES
YES
Check FBT and
C5633/C5639
YES
Check between
IC4401, Q5608
and T5602
YES
NO NO
Short protector drive
Q9752 collector = 0V?
Check between Q9752 and
IC2001
Check 16V line and 12V
regulator IC9740
YES
YES
YES
NO
27V Line
D9751 cathode = normal (27V)?
Check 27V line and IC6351
16V Line
D9752 cathode = normal (16V)?
NO
Check 8V line and 5V
regulator IC1902
YES
8V Line
D9755 anode = normal (8V)?
NO
Check 130V line and peripheral
circuit
NO
NO
NO
Video-chroma (IC4401)
H-Pulse output from
pin(23)?
NO
Check Video-chroma
circuit and replace
IC4401
Check between IC5601
to IC2001
Check between
IC5602 to IC5601
YES
NO
NO
Video-Chroma (IC4401) H-
Pulse output from pin(23)?
Check between
IC4401 to IC5602
YES
D5625 cathode H-pulse
output from FBT?
Replace IC2001
FLOW CHART No.1-7
FLOW CHART No.1-8