hfe_teac_a-x1000_x3000_x5000_service_en.pdf [6.92MB]
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Professional Audio
Teac AX5000 amplifier - one channel is heard lower
7
hace 6 años
hace 6 años
Hi, I have a Teac ax5000 amplifier, the right channel is heard lower, at half volume approx.
I already reversed the entrance and tried with others and it remains the same. I also tried changing the speakers and nothing.
With headphones it works fine.
Where do I start looking? Capacitors? Power transistors?
Assistant service manual. hfe_teac_a-x1000_x3000_x5000_service_en.pdf [6.92MB]
Thank you.
hfe_teac_a-x1000_x3000_x5000_service_en.pdf [6.92MB]
Thank you.
Hello MAURIDD, just in case, I ask you tried both system A and B?
6
hace 6 años
From the power stage, it sends a signal to SPEAKERS at points 1 and 4 on CN104, from there it drifts for headphones (via R501 and R502) and for the output terminals but before reaching them it goes through the keys that enable the A and B systems, did you try to throw abundant contact with these keys? otherwise, you will have to measure and compare the components you have just before the output terminals. Everything I indicate is on page. 15 to the right. Try a fixed tone on some input, 1Khz for example, and measure with a VAC tester and compare. Count the results
6
hace 6 años
Hi Mauridd, from what you see in the diagram, the same signal that reaches headphones comes to Speakers, there is no amplifier or stage or operational special for Phones, we would have to confirm that in Phones you also measure that uneven tone, obviously if you measure Just on the PHONES jack you are going to measure millivolts but in the same proportion, to avoid confusing one channel with another you should set the tone only in one input for ex. right and measure on the jack, with the balance in the middle obvious, and then connect the tone on the left input and measure on the other pin of the jack to confirm unbalance. S
6
hace 6 años
There I cut the part of the diagram of speakers and phones, obviously in the photo you put the components that the diagram says do not appear ... it will be another version of manual or equipment ... if also in phones it appears uneven then I would see what it indicates The Colombian colleague. Luck and tell how you do
2.802
hace 6 años
hace 6 años
Hello good night, Mr. Mauridd, I recommend you do the following:
disconnect one of the pins of the filters C283 and C284 connected to the integrated operational U204 "M5218L" channel A and B apply sound on the pins of the filters that I disconnect from the side that sounds and set if there is the same power level, This will have to be done with the other operations to rule out which of the operational problems may be.
U201 "NJM4565LD" channel A and B filters 213 and 214.
U202 "NJM4565LD" channel A and B filters 227 and 228
Greetings from Valledupar Colombia.
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