THOMSON DTH175EL - Composite Analogy Audio Trouble Service Flow Chart

THOMSON DTH175EL Service Manual
Composite Analogy Audio Trouble Service Flow Chart
Composite Analogy Audio Trouble
NG
Check R138 Signal Replace U4
OK
NG
Check U14 Pin2~4 Signal Replace U4
OK
NG
Check U14 Pin28 +5V Check Power Supply
OK
NG
Check U14 Pin21~26 Signal Replace U14
OK
NG
Check U13/U15/U16 Check U13 between
Pin2/6 Signal Pin2/6 and Pin3/5 Parts
OK
NG
Check U13/U15/U16 Check Power Supply
Pin4/8 +/-12V
OK
NG
Check U13/U15/U16 Replace U13/U15/U16
Pin1/7 Signal
OK
Check Q17/Q20 Mute Parts