9.Abnormal Picture
9-1. Horizontal Size
* At first, adjust controls in the OSD Menu
Abnormal
H.Size
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| the DC level | No | ||||
| of the base of Q517 |
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| changeable? |
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| Is the |
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collector pulse |
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of Q505 correct? |
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| cathode waveform |
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of D509 |
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correct? |
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Trouble in H.OSC/
Deflection Circuit
Refer to Horizontal Output circuit
Is
the DC level of IC501 pin 11 changeable ?
Trouble in Horizontal output circuit Check the B+ and anode voltage of CRT.
Trouble in L503, C520 or their ambient circuit
Yes | Check IC501 | |
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*Normally anode voltage of CRT is approximately, 24.7KV
*Scan B+ are as follow :
MODE | B+ Voltage |
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VGA | 60Vdc |
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Super VGA | 72Vdc |
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54KHz | 110Vdc |
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