Onkyo TX-SR602 Service Manual page 74

TX-SR602/E
ADJUSTMENT AND CONFIRMATION PROCEDURES
1.Idling current adjustment
Before Idling adjustment, turn the trimming resistors R6040 to R6045 counter-clockwise fully.
Connect the DC voltmeter to sockets P6080 to P6086.
After turn POWER to ON, adjust the trimming resistors R6040, R6041 and R6042 so that the reading of
voltmeter becomes 1.25mV. (Front and center channels)
Adjust the trimming resistors R6043, R6044,R6045 and R6046 so that the reading of
voltmeter becomes 0.75 mV. (Surround and surround back channels)
After adjustment, attach the top cover.
Confirm the voltage of points above after about five minutes.
Front and center channels
When less than 5.0 mV, readjust the resistors above so that the voltage becomes 5.0 mV.
When 5.0 mV to 6.0 mV, it is not necessary to adjust.
When more than 6.0 mV, readjust the resistors above so that the voltage becomes 6.0 mV.
Surround and surround back channels
When less than 3.5 mV, readjust the resistors above so that the voltage becomes 3.5 mV.
When 3.5 mV to 4.5 mV, it is not necessary to adjust.
When more than 4.5 mV, readjust the resistors above so that the voltage becomes 4.5 mV.
Note: No load and No signal
COM
BIAS
BIAS
BIAS BIAS TH1
TH2
BIAS
R6042
R6040 P6080 R6043
R6041 P6081 P6082
P6083
P6301
P6084
R6044
L
C
R
P6004B
SL
P6002B
P6003B
P6000B P6001B SR
NAAF-8397
NAAF-8391
BIAS
BIAS
P6085
R6045
R6046
P6086
SBL SBR