Daewoo DP-42GM, Руководство по обслуживанию

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Main PCB Trouble Diagnosis
DIODE TESTER
MEASURE
DIODE TESTER
MEASURE
- + + -
1~4 After about 15sec, OPEN 1~4 Over 0.7V
5 NC 5 NC
6 0.5V DLTKD 6 Over 0.4V
7 Over 1.2V 7 Over 0.4V
8 NC 8 NC
9~`10 GND 9~`10 GND
11 NC 11 NC
12 Over 1.2V 12 Over 0.5V
13 0 13 0
14 Over 1.2V 14 Over 0.5V
15 NC 15 NC
16 Over 1.2V 16 Over 0.5V
17 0 17 0
GND 18 NC GND 18 NC
19 Over 1.2V 19 Over 0.5V
20 0 20 0
21~22 After about 10sec, OPEN 21~22 Over 0.3V
23 NC 23 NC
24~25 OPEN 24~25 Over 0.8V
26~27 OPEN 26~27 Over 0.8V
28 NC 28 NC
29~30 After about 10sec, OPEN 29~30 Over 0.3V
31 NC 31 NC
32~35 GND 32~35 GND
36 NC 36 NC
37~38 OPEN 37~38 Over 0.3V
39~40 OPEN 39~40 Over 0.3V
Note after Y_SUSTAIN B/D REPAIR
Make sure to check power module’s high voltage (Vsus, Vyer). If remaining voltage detected,
use resistance to discharge them.
Make sure to check Connectors(Power Connector, Signal Connector, Connector between SCAN
PCB and Y-SUS PCB)’s Connection.
After replacing Y_SUS PCB, readjust Vramp_up, Vscan Voltage and Slope of Ramp_up,
Ramp_down as Optimum adjusting Voltage Table located above VIDEO PCB. (Refer to 6-2-3)
Make sure to check screw connection between X-SUS PCB and Panel back-plate.
When using scope to check signals, GND terminal must be attached to HEAT SINK