Repairing a set top box.

Sep 05, 2012 6 Replies
M

Hi all, new to this forum an electronic device repair. I have been given a few items that are faulty to learn repair on and I currently am working on a set top box the picture comes up fine but when I go to scan the channels the signal strength is exactly 0 nothing at all, I have tested various points on the board for voltage with a fluke and it all checks out, the cables are fine. And im assuming the rf modulator box is as well because im getting the display on screen when I plug the RF cable in from the wall. Just no signal strength. I at a bit of a loss as to where to start looking and cant find a service manual online to give me any clues. the board is marked as DVB-TH MB04 rev 1.2. Some jaycar product bought a few years ago. If someone could please point me in the right direction it would be very much appreciated.



Thanks for your time.


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M

im assuming the rf modulator box is > as well because im getting the display on screen when I plug the RF > cable in from the wall TV not wall

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N

First you have to check whether it has fallen foul of not enough EEprom for the current useage,

"Split NIT "

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M

Thanks :) I just done a bit of googling about so Im onto this Split NIC suggestion. If it is the case is it a matter of rewriting the eeprom, or essentially does the change in freeview spec make this a paperweight?

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M

Thanks :) I just done a bit of googling about so Im onto this Split NIC suggestion. If it is the case is it a matter of rewriting the eeprom, or does the change in freeview spec essentially make this a paperweight?

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A

I think 'Spilt NIT' is a UK issue.

Are you in Australia?

Adrian C
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M

Yes im from Australia I noticed a few things about the uk having the issue but cant find much about Australia.... noticed the tuners are quiet loose so im going to take a shot a replacing them and go from there.... Thanks for your input.

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