參數(shù)資料
型號: PN22N*
英文描述: 10A High Efficiency DC/DC µModule; Package: LGA; No of Pins: 104; Temperature Range: -40°C to +85°C
中文描述: Monitor_ICs:XC62FP3302 61CC4202 KA555D/TR RYC8220 - 200萬FST3257 52742 S5D2501E19 - D0 52324 33262 TDA16850 7045
文件頁數(shù): 19/98頁
文件大?。?/td> 2244K
PN22N*
5-1
5 Troubleshooting
5-1 Parts Level Troubleshooting
Notes:
1. If a picture does not appear, fully rotate the brightness and contrast controls clockwise and reinspect.
2. Check the following circuits.
No raster appears: Power circuit, Horizontal output circuit, H/V control circuit, and H/V output circuit.
High voltage develops but no raster appears: Video output circuits.
High voltage does not develop: Horizontal output circuits.
5-1-1 No Power Supply
Check and replace FH601, D601,
Q601, Q604, and IC611.
Done.
Repeating start
Done.
No
Yes
IC611 Drain waveformis right
Check and replace IC611.
Yes
No
Q601 Drain waveformis right
Check IC601 and D602.
Yes
No
Q604 Drain waveformis right
Check IC602 and IC603.
Yes
No
WAVEFORMS
5
2
Q601 Drain
CH1 RMS = 226.0V
4
Q604 Drain
CH1 RMS =434.4V
5
IC611 Drain
CH1 RMS = 333.2V
2
4
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