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Adjustment method
Tuner section
1.Tuner range
FM
87.5MHz~108.0MHz
AM(MW)
531 kHz to 1 602 kHz (at 9 kHz intervals)
530 kHz to 1 600 kHz (at 10 kHz intervals)
Power amplifier section
Adjustment of idling current
Measurement location
Adjustment part
Attention
This adjustment does not obtain a correct adjustment value immediately after the amplifier is
used (state that an internal temperature has risen).
Please adjust, after you turn off amplifier and internal temperature falls.
<Adjustment method>
1.Set the volume control to minimum during this adjustment.(No signal & No load)
2.Set the surround mode OFF.
2.Turn VR787 and VR788 fully counterclockwise to warm up before adjustment.
If the heat sink is already warm from previous use the correct adjustment can not be made.
3.For L-ch,connect a DC voltmeter between B2204 and B2205 (Lch)
And,connect it between B2213 and B2214(Rch).
4.30 minutes later after power on, adjust VR787 for L-ch, or VR788 for R-ch so that the DC voltmeter
value has 1mV~10mV.
* It is not abnormal though the idling current might not become 0mA even if it is finished to turn variable
resistance (VR787,VR788) in the direction of counterclockwise.
Rch amp. board
Lch amp. board
B2204-B2205(Lch) , B2213-2214(Rch)
VR787(Lch) , VR788(Rch)
RX-8022PSL
Heat sink
VR788 (Rch)
B2213, B2214
VR787 (Lch)
B2204, B2205
1-9
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