My Channel Master CM-7000 D2A TV Converter box is stuck with Red Light ONLY. Does not respond to any button I press. There is no picture
Televison & Video - Digi - Channel Master/tal to Analog Converter/CM-7000
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Answers & Comments
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
Logic board:
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.
Replace the minumum recommended caps listed. While replacing just the power supply caps will likely restore the unit to operation, it will fail again from the two on the logic board..
I was able to buy all p.s. caps at a local electronics shop, except C1 (22ufd, 400v; they only had 450v). Got a good source?
450 V is fine. It is able to handle higher voltage application but does not affect capacitance value application, as long as new capacitors voltage capability is higher. Reese Byrd