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Tube TVs
Tv howland model hld21ts without audio
347
hace 5 años
hace 5 años
Good night! Anyone know what voltages I have to have in the integrated audio an7522. The chassis is CY-PH2529TOP VER5.0. the only voltage I have is 12 v on pin 1 which according to the diagram is correct. I already changed the audio icon and there is no solution, check all the diodes and resistors, change the capacitors in that area and remain the same. I need to know the voltages I should have. Thank you! Also control the speakers and they're fine
46.781
hace 5 años
hace 5 años
With an external amplifier check the presence of the audio signal of the R-IN and L-IN pins of the amplifier IC.
Deactivate the mute transistor V602 by disconnecting its collector from the circuit
46.781
hace 5 años
Check the good condition of the mute transistor circuit (V602) and the Antiplop circuit (V601) renew those capacitors C609 and C611 ........ and those of their power supply C567, C565 and C555
46.781
hace 5 años
This fault is caused by impurity in the DC supply of the antiplop circuit, due to some undervalued filter in the indicated sector. Commonly the main filter of this source. C555
1.652
hace 5 años
hace 5 años
Hello, check the voltages on pins 5 and 9, and that none is shorted to ground ...
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