Anyone familiar will Nanao MS-2930 HV circuit? Symptom is no HV. Unfortunately no schematic/ manual I can see and can only compare against MS2931 which is too different here.
- Flyback tests good. (swapped another to be sure, same)
- Tried swapping u701, same.
- Q701 tests good
- B+ measure good @180.
- 1000kv Horizontal Drive and 55V Vertical drive measure good.
I'm not getting 700V output on Q701 drain. I'll get 45Vp-p for a second and that's it.
u701 pin 1 signal appears (the 10V pulse ) but then disappears.
u701 pin 4 shows steady 10v p-p from horizontal circuit.
u701 pin 6 getting nothing return from flyback
u701 pin 9 VCC - steady 12V
u701 pin 10 x-ray protect shows nothing, believe both 6/10 are derived from flyback.
- Flyback tests good. (swapped another to be sure, same)
- Tried swapping u701, same.
- Q701 tests good
- B+ measure good @180.
- 1000kv Horizontal Drive and 55V Vertical drive measure good.
I'm not getting 700V output on Q701 drain. I'll get 45Vp-p for a second and that's it.
u701 pin 1 signal appears (the 10V pulse ) but then disappears.
u701 pin 4 shows steady 10v p-p from horizontal circuit.
u701 pin 6 getting nothing return from flyback
u701 pin 9 VCC - steady 12V
u701 pin 10 x-ray protect shows nothing, believe both 6/10 are derived from flyback.
