TrendsAudio BA-10 Bi-amp Audio System User Manual
Page 5
Trends BA-10 Bi-amp User Guide
Section 5 Overview
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Trends TA-10.2 integrated amp./TA-10.2P Power amp.
TA-10.2 TA-10.2P
Stereo amplifier
Power amplifier
1.
Power Indicator
2.
Volume Controller – Turn clockwise to minimize the volume level and vice versa.
3.
RIGHT Speaker Output – The negative (-ve) and positive (+ve) speaker
terminals of the RIGHT channel.
4.
Audio Input – The audio signal input (LEFT/RIGHT) connects from audio source
(e.g. CD player) to the amplifier by the RCA audio cable.
5.
LEFT Speaker Output – The negative (-ve) and positive (+ve) speaker terminals
of the LEFT channel.
6.
Power ON/OFF switch – pull up to power on the TA-10 amplifier and pull down to
power off.
7.
Power Supply Socket – Plug the bundled AC Adaptor to this socket to supply
power to this amplifier.
Trends BA-10 Bi-amp User Guide
Section 6 Technical Notes
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6.1 Jumper Setting for Different Tube Series
You can simply configure the amplifier to support the two different tube series by
resetting the jumpers in J3, J4, J5 in the PCB as follows. (Remember to power OFF
the machine before setting)
6.2 DC Bias Voltage Tuning
Since each tube may derivate a bit in parameters, especially from different series, it
needs to re-tune the DC bias voltages to guarantee the machine is working in the best
point and performing the best sound quality.
There are two blue precise adjustable potentiometers PA-10.1D R5/R6(L/R channel) ;
PA-10 R3/13(L/R channel) for tuning the DC bias voltage of each channel. The DC
bias has been tuned in factory. But after run-in for a period or changed another tube, it
would be deviated that the fine-tuning is needed.
Before you tune these, you need a screwdriver (take off the case), a small screwdriver
(turn the screw of the potentiometer) and a (digital) multi-meter to detect the DC bias
voltage.
PA-10.1D(2 Output) Bias Setting
6DJ8 series
12AU7 series
J3
O O O
O O O
O O O
O O O
J4
O O O
O O O
J5
O O O
O O O