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Tech Head - The Technology Section
The Work Bench and Soldering Station
Pace 2500 ZIF Tuner Problems
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<blockquote data-quote="spiney" data-source="post: 165389" data-attributes="member: 192438"><p>If actually faulty, working Zif tuners are (or were!) available VERY cheap on Internet, use Google to find suppliers.</p><p></p><p>Don't know about 2500, but my 2200 has a fusable protection link for the lnb dc volts going into tuner, if present that can sometimes blow, so check for volts going into it (looks like a ceramic disc capacitor, trace back the dc volts line from tuner pin 1 nearest lnb socket). If blown, available from various places, eg <a href="http://www.grandata.co.uk" target="_blank">www.grandata.co.uk</a> .</p><p></p><p>If no dc volts into fusable link, it's necessary to check further back to the 14/18 v generation section, either a tranny or 3 pin regulator, both "spottable" from the tiny metal heatsink lug.</p><p></p><p>(ps, on box1, also check 22Khz is actually there on lnb socket, or obviously you don't see default transponder, whether or not the tuner's working! Scope, or can use ac volts range on multimeter, 22Khz should register on that!).</p></blockquote><p></p>
[QUOTE="spiney, post: 165389, member: 192438"] If actually faulty, working Zif tuners are (or were!) available VERY cheap on Internet, use Google to find suppliers. Don't know about 2500, but my 2200 has a fusable protection link for the lnb dc volts going into tuner, if present that can sometimes blow, so check for volts going into it (looks like a ceramic disc capacitor, trace back the dc volts line from tuner pin 1 nearest lnb socket). If blown, available from various places, eg [URL="http://www.grandata.co.uk"]www.grandata.co.uk[/URL] . If no dc volts into fusable link, it's necessary to check further back to the 14/18 v generation section, either a tranny or 3 pin regulator, both "spottable" from the tiny metal heatsink lug. (ps, on box1, also check 22Khz is actually there on lnb socket, or obviously you don't see default transponder, whether or not the tuner's working! Scope, or can use ac volts range on multimeter, 22Khz should register on that!). [/QUOTE]
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Pace 2500 ZIF Tuner Problems
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