Amc CVT2030 pwr adj
This is the 1 pages manual for Amc CVT2030 pwr adj.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.
Extracted text from Amc CVT2030 pwr adj (Ocr-read)
Page 1
AMCTM CVT3030 / CVT2030
TECH NOTES
POWER AMPLIFIER ADJUSTMENTS
Important Notes Before Making Adjustments:
1,
2.
3.
4. Unit must be preheated for at least 5 minutes.
T>
9w
3!
9w
5"?
Make sure the primary voltage is set properly (110V - 220V)
Set the "PHONES/NORMAL/DIRECT" switch (on CVT3030 only) to the "PHONES"
position, which mutes the amplifier.
Turn VR502 fully counterclockwise and VR503 fully clockwise.
. Center Voltage Adjustment
Connect a D.C. voltmeter between point A (the junction between the drain of 0508 and
R517) and point 8* (the junction between the drain of 0509 and R519)
Adjust VR501 for a voltmeter reading of 0 volts, +/- 5 volts D.C.
Repeat the above procedures for other channel.
. Bias Current Adjustment
Connect a D.C. voltmeter between point 61* (the plate of tube V502) and point D (the
B+ supply).
Adjust VR502 for a voltmeter reading of 6 volts D.C.
Connect a D.C. voltmeter between point 62* (the plate of tube V501) and point D (the
B+ supply).
Adjust VR503 for a voltmeter reading of 6 volts D.C.
Repeat the above procedures for other channel.
J <9 19-1219 L
g c1§ on: g C2\* usu
2
8 CD /v§502 '"/ VR503
ear - 0?"
C ..
:13 200%
E ISXT ("at 4
3 E a r. u
@ 5 00 um:
[:11 K- B* /®
1 "m VR501 -