6 Troubleshooting
6-24
DP14L*/DP15L*
6-2-21 Horizontal Blank Failure
6-2-23 Spot at Center During Power Off
6-2-22 Whistle Sound
Check trans coil
(L401,
T501, T601, CRT)
Is H_Blank waveform on
Q510’s collector?
Check CN105 and CN202.
Check and replace IC101.
Check and replace C501, C502,
C503, R504.
No
Yes
Are Q504 and D515 ok?
Replace it.
Yes
No
Symptoms: – Dark image and if shifting image to left or right side, image is rolled.
– Raster left or right side is rolled.
Does G1 voltage vary from
–60~80 Vrms to –200 Vrms during
power off time? (After falling
down to –200V, G1 voltage is
slowly increased to 0V).
Check and replace CRT.
No
Yes
32
31
Are 12 V line and Q501 ok?
Replace it.
Check and replace C506, D504, R515,
R516, R517.
Yes
No
WAVEFORMS
31
5.36 V (Q510, Collector)
CH1 P-P = 5.36 V
CH1 RMS = 4.210 V
WAVEFORMS
32
158 V (CN105, G1)
CH1 P-P = 158 V
CH1 RMS = 151.1 V
Содержание DP14LT
Страница 7: ...Memo 2 Product Specifications 2 4 DP14L DP15L ...
Страница 9: ...Memo 3 Operating Instructions 3 2 DP14L DP15L ...
Страница 13: ...Memo 4 Disassembly and Reassembly 4 4 DP14L DP15L ...
Страница 44: ...DP14L DP15L 7 1 7 Exploded View and Parts List 7 1 DP14L ...
Страница 45: ...7 Exploded View Parts List 7 2 DP14L DP15L 7 2 DP15L ...
Страница 46: ...DP14L DP15L 7 3 7 1 1 Front Cover CRT Ass y DP14L ...
Страница 47: ...7 1 2 Chassis Stand Ass y DP14L 7 Exploded View Parts List 7 4 DP14L DP15L ...
Страница 48: ...7 1 3 Rear Cover Ass y DP14L 7 Exploded View Parts List DP14L DP15L 7 5 ...
Страница 49: ...7 Exploded View Parts List 7 6 DP14L DP15L 7 2 1 Front Cover CRT Ass y DP15L ...
Страница 50: ...7 2 2 Chassis Stand Ass y DP15L 7 Exploded View Parts List DP14L DP15L 7 7 ...
Страница 51: ...7 2 3 Rear Cover Ass y DP15L 7 Exploded View Parts List 7 8 DP14L DP15L ...
Страница 63: ...8 Electrical Parts List 8 12 DP14L DP15L Memo ...
Страница 65: ...Memo 9 Block Diagrams 9 2 DP14L DP15L ...
Страница 67: ...11 1 DP14L DP15L MULTI MEDIA 11 Schematic Diagrams 11 1 Power Part Schematic Diagram ...
Страница 69: ...11 Schematic Diagrams 11 3 DP14L DP15L 11 2 Micom Part Schematic Diagram ...
Страница 71: ...11 Schematic Diagrams 11 5 DP14L DP15L TILT OPTION 11 3 HOR VER Part Schematic Diagram ...
Страница 73: ...11 Schematic Diagrams 11 7 DP14L DP15L 15 ONLY 11 4 H_OUT Part Schematic Diagram ...
Страница 75: ...11 Schematic Diagrams 11 9 DP14L DP15L 11 5 Video Part Schematic Diagram ...
Страница 77: ...Memo 11 Schematic Diagrams 11 11 DP14L DP15L ...
Страница 78: ...Samsung Electronics Co Ltd April 1999 Printed in Korea Code No BH68 00128A ...