Troubleshooting
7-4
Samsung Electronics
Symptom
No Display ( Operating Voltages exis t, but an Image doesn’t exist on Screen. )
Cause
Fuse or FET is destroyed.
T rouble
Shooting
F USE
F ET
[ X- MAIN ]
Check severa l points
FUSE
F40 0 3 for Vs
F40 0 1 for Vcc
F40 0 2 for Vdd
OPEN
OK
FET
SHORT
Re place the
board
Replace the
boa rd
Q4 00 9 ~ Q40 1 6
OK
X- MAIN
Nor
mal State
Check Logic- main
F USE
Q4 0 0 9 ~ 1 6
Summary of Contents for D61B
Page 10: ...3 2 Samsung Electronics MEMO ...
Page 30: ...4 20 Samsung Electronics MEMO ...
Page 38: ...Alignment and Adjustments 2 8 Samsung Electronics MEMO ...
Page 61: ...Fig 18 Chopper Circuit 6 22 Samsung Electronics Circuit Operation Description ...
Page 85: ...8 8 Samsung Electronics MEMO ...
Page 99: ...9 14 Samsung Electronics MEMO ...
Page 106: ...Samsung Electronics Schematic Diagrams 10 7 10 7 SMPS 2 ...
Page 107: ...Schematic Diagrams 10 8 Samsung Electronics 10 8 SMPS 3 ...
Page 108: ...Samsung Electronics Schematic Diagrams 10 9 10 9 SMPS 4 ...