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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Teac TV ctm687 tuner problem.
I am repairing this Teac TV ctm687 which has a grainy picture on all
channels; even when using the vcr (however the tapes play a normal picture. Hence I suspect the tuner (oscar 2900kkc) for which I measure 7.87 volts at the AGC pin which goes to i/c TDA8305A pin 5 which according to TV schematics should only have 3.9 volts. My B+ at the tuner is 12.11 and I wonder if this is the correct supply voltage to the tuner. Thanks in advance. Al |
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