6 Troubleshooting
DP14L*/DP15L*
6-3
6-1-3 No Video or Missing Colors
Are 0.7Vp-p video input on
CN202_2 R, G, B?
Check signal cable and generator.
Yes
No
Are proper waveform on
SK103’s R, G, B cathode?
Refer to 6-2-16 No Video.
Yes
No
Is G2 and heater voltage OK?
Check and replace SK103 and
some parts around it.
Yes
No
Change CRT and replace it.
Check white balance adjustment.
WAVEFORMS
22
19
19
46.4 V (SK103, G)
CH1 P-P = 46.4 V
CH1 RMS = 38.16 V
22
1.016 V (CN202_2, #2,4,6)
CH1 P-P = 1.016 V
CH1 RMS = 174.4 mV
WAVEFORMS
17
35.2 V (SK103, G1)
CH1 P-P = 35.2 V
CH1 RMS = 80.84 V
25
4.96 V (IC201, #30)
CH1 P-P = 4.96 V
CH1 RMS = 350 mV
Check signal cable connection, H/V Sync input.
Check Timing mode (14”: 30~55kHz, 15”: 30~61kHz).
Check Cont, Brit key (all Max) and Screen VR (G2).
6-1-4 Visible Retrace
Is G2 voltage (Screen VR) OK?
Adjust Screen VR to 0.4~0.6F/L (back
raster) at cont, bright all max.
Yes
No
Is V_sync input on Q301 base?
Check V_sync input line.
Yes
No
Is proper G1 pulse on SK103’s
G1 pin?
Check C306, C506, D504
Q301,
Q501 and around parts.
Yes
No
Check and replace CRT.
25
17
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 ...