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3. Quick checklist for common faults in TDA8842/OM8838 series color TV sets:
Fault symptom
Faulty unit circuit
Faulty element
Three no’s, the indicator
is not ON
Power supply
section
Fuse F801 damaged, and resistor R802
damaged
Three no’s, the indicator
is not ON
Power supply
section
Fuse F801 damaged, and diodes D801, D802,
D805 and D806 damaged
Three no’s, the indicator
is not ON
Power supply
section
Fuse F801 damaged, and transistors V802 and
V805 damaged
Three no’s, the indicator
is ON
Horizontal section V402 damaged, and C413 damaged
Three no’s, the indicator
is ON
Horizontal section V402 damaged, and D412 damaged
Three no’s, the indicator
is ON
Power supply
section
N807 damaged, and V809 damaged
Three no’s, the indicator
is not ON
Power supply
section
N805 damaged
Top retrace horizontal
Vertical section
D406 damaged, and R307 damaged
Top retrace horizontal
Vertical section
N301 damaged, and R307 damaged
Three no’s, the indicator
is ON
Horizontal section V401 damaged
Horizontal bright
horizontal
Vertical section
R306 damaged, and D405 damaged
Three no’s, the indicator
is ON
Power supply
section
V808 damaged
Three no’s, the indicator
is ON
Video amplification
section
N201 damaged
No AV input
AV section
N001 damaged, and ZD001 damaged
Pillow distortion
Pillow
distortion
equalizing section
V452 radiator copper foil broken
Three no’s, the indicator
is ON
Power supply
section
V801 damaged
Three no’s, the indicator
is ON
Video amplification
section
V206, V201, V210 damaged
Summary of Contents for CTM6845
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