Question about Digi Zinwell ZAT-970A tal TV Converter Box
2 converter boxes zat-970a. both do same thing. when turned on box light is green and tv tries to accept signal but after a few seconds converter box start flashing red and no signal is passed on to tv.
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Posted on Jan 02, 2017
This is a common problem. There are several capacitors on the power supply and logic board that are bad. Replacement of these parts has restore all units that I have looked at.
On the power supply I would replace at a minimum:
C14 - 4.7ufd 50v UPW1H4R7MDD
C4 - 1ufd 50v UPW1H010MDD
C8 - 100ufd 25v UHE1E101MED
C10 - 470ufd 16v UHE1C471MPD
C12 - 1000ufd 10v UHE1A102MPD
There are 4 others in the supply that were not grossly bad.
C1 - 22ufd 400v EEU-EE2G220
C7 - 220ufd 25v UHE1E221MPD
C11 - Same as C10
C13 - Same as C10
E5 - 33uf 35v EEU-FM1A471
E6 - Same as E5
Part Numbers of replacement caps are Nichicon or Panasonic.
Note: Caps on the logic board are extremely hard to replace due to the internal ground plane.
Contact me if this is beyond your skills for possible repair.
Posted on Nov 14, 2011
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