CH1 of Picture Pin 21
Pressed
RMS voltage
0.7 ~ 0.9 V
0.7 ~ 0.9 V
CH2 of Picture Pin 21
Keyout
Normal
5 V
0 V
Keyin
6 Troubleshooting
6-22
DP14L*/DP15L*
6-2-18 Key Check
1) Key Map
R206
R207
R208
R209
SW204
(V-Size)
SW203
(H-Size)
SW202
(V-Posi)
SW201
(H-Posi)
SW208
(Cont)
SW207
(Brit)
SW206
(Trap)
SW209
(Up)
SW210
(Down)
SW205
(S-Pin)
Keyout3
(#5)
Keyout2
(#4)
Keyout1
(#3)
Keyin4
(#39)
Keyin3
(#40)
Keyin2
(#42)
Keyin1
(#1)
2) Voltage Check of Keyin and Keyout
– Press the key what you want to check.
– At that moment, the voltage of keyin and keyout that is connected with together should be changed as follows.
3) LED Check
– Pressing key, LED should be blinked.
4) How to Repair?
– If only one key has a key problem, replace that key.
– But if some keys that are connected with same keyin or keyout line have problems,
check and replace PCB pattern and IC201.
WAVEFORMS
21
5.52 V (IC201, Keyout)
CH1 P-P = 5.52 V
CH1 RMS = 3.696 V
21
5.44 V (IC201, Keyin)
CH1 P-P = 5.44 V
CH1 RMS = 1.436 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 ...