AC 501 User Guide
Page 3
... from the main power supply before cleaning. The power cable must be easily accessible. 3 If the device will not be used for repairs. If any questions regarding service and repairs to guarantee the device's performance and reliability. 18. d- Use only approved original spare parts, or parts in such a way nobody can harm...
... from the main power supply before cleaning. The power cable must be easily accessible. 3 If the device will not be used for repairs. If any questions regarding service and repairs to guarantee the device's performance and reliability. 18. d- Use only approved original spare parts, or parts in such a way nobody can harm...
AC501 Monitor Service Guide
Page 23
Power Supply Check S ta rt Check Yes fuse open Check and repaor EMI Filter and Q901, I/P Rectifer R909, U901, R907 Is Q901 VDS No waveform normally? Is 60V voltage correct? Is 7.5V in spec? TROUBLE SHOOTING A. Check and repaor Q902, Q903, U901, D908, R931 D909, R908 Is 13V in spec? No Check VR901, D941, A942, Q943 No Check D940, Q940, R945, D951 No Check D942, C946 Combine with No monitor check operating frequency? 4. OK S to p Check and repair R919, R912, R918, C912 23
Power Supply Check S ta rt Check Yes fuse open Check and repaor EMI Filter and Q901, I/P Rectifer R909, U901, R907 Is Q901 VDS No waveform normally? Is 60V voltage correct? Is 7.5V in spec? TROUBLE SHOOTING A. Check and repaor Q902, Q903, U901, D908, R931 D909, R908 Is 13V in spec? No Check VR901, D941, A942, Q943 No Check D940, Q940, R945, D951 No Check D942, C946 Combine with No monitor check operating frequency? 4. OK S to p Check and repair R919, R912, R918, C912 23