5
PMA-2000
IV
R
IDLING CURRENT
Setup
1. Lay the unit at an ordinary position away from a direct current from an air condition or fan. Do the adjustment at a
temperature between 15°C (59°F) and 30°C (86°F).
2. Set control as follows.
POWER SWITCH
OFF (
).
VOLUME CONTROL
Fully counterclockwise in the minimum position (
).
(Main Volume and Semifixed resistors [VR501, 502])
SPEAKER Terminals
Open: do not connect the speakers, dummy load etc.
Adjustment
1. Remove top cover. And then connect DC Voltmeter to test points of 1U-3432-1 (Lch) and 1U-3432-2 (Rch) Power Amp
Printing Wiring Board.
2. Connect power cord to AC wall outlet, and turn POWER switch "ON" (
). Within 10 seconds turn VR501 (Lch) and
VR502 (Rch) clockwise so that the DC Voltmeter reads 12 ±0.5mV.
3. Then after 2 minutes warmup adjust VR501 and VR502 so that the DC Voltmeter reads 12
±
0.5mV.
4. And after 10 minutes warmup adjust VR501 and VR502 so that the DC Voltmeter reads 12
±
0.5mV.
METHOD OF ADJUSTMENTS
DC Voltmeter
Main Volume
1U-3432-2
Power Amp P.W.B. (R)
VR502
1U-3432-1
Power Amp P.W.B. (L)
VR501
Power
Trans
Power
Trans
Summary of Contents for AVR-1602/682
Page 25: ...12 7V 9 5V 11 5V SCHEMATIC DIAGRAMS 1 3 1 2 3 4 5...
Page 26: ...9 5V 9 4V 8 8V 11 5V 6 7 8 9 10 11 A B C D E F PMA 2000IVR...
Page 27: ...12 7V 11 5V...
Page 31: ...SCHEMATIC DIAGRAMS 2 3 1 2 3 4 5...
Page 32: ...11V 11V 6 7 8 9 10 11 A B C D E B LINE PMA 2000IVR...
Page 33: ......
