Posts by Wumpi
20 total posts18 results
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Nov 7, 2023 18:23I am getting back in this forum cause this amplifier makes me crazy. Tr 47 keeps blowing all the time.i have checked the voltage and its all good The trimmer pot is working fine after i desoldered it and check it out. It…
Beomaster 3000-2 input signal trace design
in BeoMaster · Nov 1, 2023 20:24Hello Dilen Thanks for the information. Btw the left channel in stage 3 amplifier the supply voltage is way down than the normal voltage.It is around 15 volt Although the rail voltage is 60 volt in tr57 for example all t…
Beomaster 3000-2 input signal trace design
in BeoMaster · Nov 1, 2023 11:22So when adjusting the bias voltage,in the beginning the trimmer should be full counter clockwise right? Thanks.
Beomaster 3000-2 input signal trace design
in BeoMaster · Oct 28, 2023 08:52Hello. Can anyone design the input signal trace on the upload pdf sketch? Thanks..
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 27, 2023 16:43No i was reffering in the output only .so I will meausure across the resistor and with that value I will apply the ohms law. Is it worth upgrading this receiver? I have also philips 22rh 720 class a upgraded.. Thanks for…
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 27, 2023 15:43R491 output Btw which capacitors output stage are you referring? Thanks
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 27, 2023 15:37The output voltage on the resistor is around 28v So 28÷0.15=186 Are you sure this the right proccess?
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 27, 2023 13:20So shoul i measure volt from the resistor from tr49 emmiter and with ohm law to adjust the current?
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 26, 2023 20:03Hello. Which emmiter resistors are you referring? No I didn't replace the output capacitors. The manual aI read doesn't refer anything about bias procces setting.Not either any mv number set.I replaced tr47 bc311 with bc…
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 25, 2023 22:57But Bc 161 specs are almost identical with bc 311. Btw How many miliampere should I adjust? The manual doesn't say anything for the adjustment. In which transistor base should I put the multimeter probes to take meausure…
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 25, 2023 20:40How much the bias should be set?where exactly should I look? The problem is that the replacement transistor burned again after a few minutes..
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 25, 2023 14:29Finally I fix. It seems that tr47 was damaged and from the swap proccess from left channel I accidentally put the same transistor.. I replacced it with bc161. Now i must set the correct supply voltage. The base voltage i…
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 24, 2023 05:57Anode right channel 568 kohm. Left channel 590kohm
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 24, 2023 01:27Exactly it's 0 volt on two transistors as you describe..I check the traces and everything is fine.i will make the meausurement on diode tomorrow to see the results Btw I tried to put voltage from base of tr46 on tr47 and…
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 23, 2023 02:31Hello. Thanks for your interesting. There is no voltage on anode leg of diode.i swapped two times with new but still nothing. The trace is ok I did a bridge between input and output of diode and I measured a significant …
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 22, 2023 09:07Hello Mark. The voltage in left good channel is around 22 on input diode and on right is 27 voltage.more close to factory. BUT this transistors are only for current protection. As the manual says.When I removed them the …
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 22, 2023 07:23It's not tr46 cause I swapped from the left channel and still nothing.. The commiter still has no output voltage while base and emmiter has..
Beomaster 3000-2 heavy distortion from right channel
in BeoMaster · Sept 20, 2023 01:21I have a full distortion from right channel. From the voltage and signal trace I did I discovered that there is no output voltage and signal from 496 diode.I changed the diode but still nothing I swapped the transistors …