Adjustment - Denon PMA-720AE Service Manual

ADJUSTMENT

Adjusting Idling Current
Required measurement equipment: DC Voltmeter
1. Preparation
(1) Avoid direct blow from an air conditioner or an electric fan and humidity should be moderate, and place the set at
normal usage environment.
Temperature should be at 15 °C ~ 30 °C (59 °F ~ 86 °F).
(2) Presetting
• POWER (Power source switch)
• VOLUME (Volume control)
• SPEAKER (Speaker terminal)
(Do not connect speaker, dummy resistor, etc.)
2. Adjustment
(1) Remove top cover. And then connect DC Voltmeter to the test points CN31 and CN32 of CUP12196B Main PCB.
(2) Connect power cord to AC wall outlet, and turn POWER switch "ON".
(3) Right after power on, adjust VR31 and VR32 so that the DC voltmeter reads 10 ± 1mV.
(4) Then after 2 minutes warm up adjust VR31 and VR32 so that the DC voltmeter reads 10 ±1mV.
(5) And after 10 minutes warm up adjust VR31 and VR32 so that the DC voltmeter reads 10 ±0.5mV.
Power
Trans
OFF
c min.
No load
CN31
VR31
VR32
CN32
Volume
12
DC Voltmeter