58
27DV-S100
27DV-CS10
No Sound Protect Mode
X-Ray Protect
NO
NO
YES
IC3001(MTS)
Audio signal output from pin(3),(2)?
Speaker amp (IC6351)
pin(10) = 27V ?
Check TV power circuit
YES
Replace IC3001
NO
System control (IC2001)
pin(83) = 5.0V("H")?
NO
YES
Speaker amp (IC6351)
Audio signal input to pin(2), (5) ?
Check between IC3001 and IC6351
NO
YES
Speaker amp (IC6351)
pin(8) = 0V ?
Check speaker mute line between
IC2001 (µ-com) and IC6351
YES
Check between IC3001 and IC3201
(EQ Sound)
Check between TU1951 (tuner) to
IC3001
YES
Check between TV Power PWB and
speaker.
IC3001 (MTS)
Audio signal output from pin(40), (39)?
NO
NO
IC3001 (MTS)
Audio signal input to pin(14)?
When a unit changes into a dangerous state, it turns off automatically and makes Power LED flash
on and off continually to indicate the Protect Mode.
Flashing 1 time X-Ray (/Def. Over Current/Dynamic Focus Over Voltage) protect
Flashing 2 times Vetical-Out Protect
Flashing 3 times TV Power Short Protect
(Check when power On)
YES
Check or replace IC2001
NO
X-Ray protector
Q2808 collector = 5.0V("H")?
YES
Check between Q2808
and IC2001
YES
YES
X-Ray protector
D5623 anode = over 4V?
NO
Check between D5623
and Q2808 base
NO
NO
Def. over current detector
Q5610 collector = about
130V?
Dynamic focus over voltage
detector D5627 anode = over
5V?
YES
Check FBT T5603,
peripheral circuit and
deflection circuit
YES
Check dynamic focus
circuit (Q5604, T6601 and
peripheral circuit)
NO
Check Q5606 and D5608
Check R5646, R5648 and
D5628
NO
X-Ray protector
D5623 cathode = over 13.5V?
Def. over current protector
Q5606 base = over 4V?
YES
Check Hi-Voltage (33kV;CRT anode), FBT T5603 and
peripheral circuit
YES
+B voltage (L9720) =
130V?
NO
Check TV power
circuit
FLOW CHART No.1-5 FLOW CHART No.1-6