Channel Master Digital Analog Converter Box CM-7000
Channel Master Digital Analog Converter Box Model No. CM-7000, Has A Module D2A_R12, Manufactored By DeltaCom Electronics LTD. 03.DEC.2007, Has A Part With m1100 16V, ; I Checked Other Parts Identical, And They In Both Directions Give A Reading, But E1 In Both Directions Goes Infinite. What Is This Part And Where Can I Buy This Part. Now Remember All The Others E2, E3, E4 etc. Gives A Reading. Also Have Checked All Fuses(All Good) F1 - F5, FF1 - FF2, FT1 - FT2, FW1 - FW2 etc. Unit Has Red Power Light But Does Not Turn On When I Push Power Button Or With Any Remote Control.
Re: Channel Master Digital Analog Converter Box CM-7000
E1 is a 100 uF 16 VDC capacitor. I have been repairing these units lately and have experienced some of the same symptoms (LED goes red but doesn't transition to green after 30 seconds like it should). I have been able to repair some of these units. Make sure the power supply is working properly before spending significant time on the D2A board. The power supply is responsible for supplying 12, 5, and 3.3 VDC to the D2A board. A defective PS will measure 14.5 instead of 12, 6 instead of 5, and 2.9 instead of 3.3. The AC ripple should be about 5 mV on the 3.3 and the 5 volt supplies when loaded. The 12 volt can be as high as 50 mV on a good PS. The culprits are C12 (1000uf) and C10 (470 uf) which are the filter capacitors for the 3.3 and 5V outputs respectively. C12, the capacitor for the 3.3 V output is especially critical because it is used to feed the voltage regulator and overvoltage shutdown circuit. D7 is a hot part and can also fail sometimes. I have repaired 50% of my units just by changing these capacitors. I still have units where the D2A board is bad with a known good power supply. If anyone has more info on the D2A (like a schematic) please pass it along
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According to the user's manual, the TV can receive and decode analog and digital TV signals, so no, you should not need a digital converter box. During the channel scan it will search for analog channels first, then digital ones.
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.
First look at the indicator lamp on the front left side. If it is: off - check the power cord is plugged into a working outlet. Amber - the unit is in standby, press the on button (left most), it should turn green Green - the unit is in operate mode, check the antenna and cable connection. Red - when power is applied, it will be red for up to 30 seconds. If it remains red, the unit is defective. This is a common problem due to several capacitors on the power supply and logic board that have gone bad. The unit is repairable by replacing these capacitors.
The short answer is no. The reason for that is because it's an analog TV and has a standard tuner which is now obsolete because of the changes to all digital programming last year. You won't be able to use it with out a converter box. I won't recommend a particular brand or model, that would be your choice. Here is a selection of "boxes" available.
my first question is how many channels can you receive now, that are clear with no snow, without a dtv box hooked up. if any channels have snowy pictures now when tuned in at best reception, you more than likely will not pick then up with the dtv box. the only option in my opinion that some may prefer from one model to another would be the program guide on some units only show whats on now and next, whereas some units may have a 5 to 7 day program guide. there is one unit out that has a noticeable hum on the audio if turned to a high volume. Im not familiar with the dtt901, but from what you have looked at so far, you shouldnt go wrong with purchasing any one of them. If you can only get 1 or 2 channels now, i wouldnt invest a fortune in a dtv box, unless its your only means of viewing television, and watch alot of tv.