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): 27/98頁
文件大?。?/td> 2244K
5 Troubleshooting
PN22N*
5-9
5-1-16 No Video
IC101 Pin 1, 3 and 5
inputs are right
IC101 Pin 17, 21 and 23
outputs are right
Check I
2
C bus and +12 V line.
Yes
Yes
No
Check D_SUB and BNC.
No
IC102 Pin 2, 6 and 11
outputs are right
Check +12 V line.
Check and replace IC102.
Yes
No
Cathode DC levels are right
Check +80 V line.
Check and replace IC150.
Yes
No
G2 voltage is right
Check G2 wire,
CRT Socket board and FBT.
Change CRT.
Yes
Done.
No
Check signal cable and connection.
34
46
37
34
IC101 #1, 3, 5
CH1 RMS =3.475V
37
IC101 #17, 21, 23
CH1 RMS = 1.969 V
46
IC102, #2, 6, 11
CH1 RMS = 2.896 V
WAVEFORMS
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