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Thread: DSR-920 4DTV receiver lithium battery issue

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    DSR-920 4DTV receiver lithium battery issue

    I just got a General Instrument model DSR-920 4DTV receiver. It hasn't been used in years, but looks to be in very good condition. I've been reading the forum threads about this receiver and I understand there is an issue with the lithium battery failing and ruining the receiver. So I opened up the receiver and checked the battery voltage. It is still reading 6.3 volts which I believe means the unit is still good at present. But I don't want to take any chances. There is no telling how long before the battery fails. The receiver has been in storage for 5 years and still has the original battery. I just ordered a new battery today from Digi-Key, their number 439-1008-ND which is a Tadiran Batteries - TL-5955/P. I will be changing the battery as soon as the new one gets here. Wish me luck, and if anyone who has done this before wants to give me some encouragement, and pointers it would be very much appreciated.


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    The battery replacement MUST MUST MUST MUST MUST be done with power to the unit. Before you replace the battery, make sure the UID on the back of the receiver matches the UID on the diagnostics screen. If no match, the receiver is only good as a mover and possibly some ZK channels. Do a GOOGLE search for battery replacement instructions if you want to try it yourself. A company called ATS is recommended if you are unsure of your ability to do this. The DCII chip must not lose power while doing the replacement.

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    Ku setup: Winegard 3100, Invacom QPH-031, DG-380 (jury is still out on this setup - tighter beam patterns giving me alignment fits)
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    Receivers: Sonicview 8000HD, Viewsat 2000 Ultra, Prof 7301, Digitrans DVB/DCII DTE-7150, DSR-922, Skybox F3, Geosat Pro MicroHD

    Hardware in storage: Winegard 2076, SG-2100, SL2 bullet LNBF, 10' KTI buttonhook, Prodelin 1.8m Ku fixed, numerous DirecTV and Dish reflectors

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    Thanks for the reply! It took me a while to locate the instructions for pulling up the the diagnostics screen. I don't have a manual. I finaly found instructions an looked. There is both an IUD number and a unit number present. The unit number matches the unit number on the back of the receiver. So I guess I'm good to go once the battery I ordered gets here. There are good instructions on how to do the battery change several places on line. I'm going to go ahead and do it. Thanks again for the response. From what I've been reading I think if I succeed the work will just be starting as it looks like I will have to bring the programing up to date.

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    Quote Originally Posted by JeremielMontanez View Post
    Thanks for the reply! It took me a while to locate the instructions for pulling up the the diagnostics screen. I don't have a manual. I finaly found instructions an looked. There is both an IUD number and a unit number present. The unit number matches the unit number on the back of the receiver. So I guess I'm good to go once the battery I ordered gets here. There are good instructions on how to do the battery change several places on line. I'm going to go ahead and do it. Thanks again for the response. From what I've been reading I think if I succeed the work will just be starting as it looks like I will have to bring the programing up to date.
    Go for it. The 920 is not that bad. However I have never replaced a battery on a 920 live "power plugged in".

    I always take the 4d board out and install the new battery after that I remove the old battery.





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    Quote Originally Posted by wallyhts View Post
    Go for it. The 920 is not that bad. However I have never replaced a battery on a 920 live "power plugged in".

    I always take the 4d board out and install the new battery after that I remove the old battery.
    Yes! That is what I will do to. I think the concern is that if the battery is real weak and you unplug the receiver you will loose the UID. But this receiver has been unplugged and in storage for five years the man who gave it to me told me. Before I had done much research and before I had ever plugged it in I opened up the receiver and measured the battery voltage, it was at 3.6 volts. It must have been a real good battery because the man owned and used this receiver for many years before he put it in storage. I did eventually plug the receiver in when I was informed that I needed to check if the UID and receiver number were still in memory. I had a feeling they were but I plugged it in and checked anyhow after finally locating instructions on how to do so. I think this battery is still charged enough to last another day or two until the new battery gets here. I will solder in the new one with the old one still in place, then remove the old one. Meanwhile I'm going crazy reading about how to reprogram this receiver to bring it up to date. I think that after I install the battery I, going to set this aside for awhile. I still have to dig up the 12 foot dish this Sunday, bring it home and install it here. No wonder all this stuff was free. No one else is crazy enough to get involved doing all this work, but I'm loving it. :O)

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    The 920 sounds like it is similar to the digitrans units if you can easily remove the board to work on it. I have a 922 and it is not so simple to remove the board...

    I'm glad wallyhts popped in and cleared it up. I am one of the few that did the battery swap with a powered receiver. My trusty butane soldering iron is the best for "hot" work if you excuse the pun.

    C band work is a great educational experience. It involves geometry, basic engineering principles, and hard labor while digging. Pretty well rounded if you ask me.


    Sent from my Timex Sinclair using SatelliteGuys
    Sat locations I can use, Sat names mean nothing to me!

    Ku setup: Winegard 3100, Invacom QPH-031, DG-380 (jury is still out on this setup - tighter beam patterns giving me alignment fits)
    C-Band setup: No dish up currently, Chapparal ortho w/ 8115's, Vbox-X

    Receivers: Sonicview 8000HD, Viewsat 2000 Ultra, Prof 7301, Digitrans DVB/DCII DTE-7150, DSR-922, Skybox F3, Geosat Pro MicroHD

    Hardware in storage: Winegard 2076, SG-2100, SL2 bullet LNBF, 10' KTI buttonhook, Prodelin 1.8m Ku fixed, numerous DirecTV and Dish reflectors

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