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Old 1st Jun 2006, 8:57 pm   #6
jim_beacon
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Join Date: Mar 2003
Location: Bishop's Waltham, Hants, UK.
Posts: 939
Default Re: Can somebody please repair My TV22

Hi Andi,

you must have some HT, otherwise the line output stage wouldn't run (no heater glow from the EY51). I would suggest measuring the voltage at the cathode of the rectifier (PY33?), and then working in from there. The rectifiers in these sets (TV22 / TV23) have too much capacitance in the filter, and you will often find the rectifier half low emmission, while the boost side tests as new - in this case, you can temporarily use a silicon rectifier.

Another useful tip on this range, for test purposes, you can disconnect the HT at the plug which connects the two chassis (leave all the other wires in), this will allow you to isolate any leaky wax caps.

Let us know how you get on.

Jim.
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