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DTR-5.5 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
IDID+ ID+ ID-
COM BIAS R6040 P6080 BIAS R6041 P6081 BIAS R6042 P6082 ID+ IDBIAS R6043 P6083 BIAS ID+ IDR6044 ID+ IDSL P6003B P6084 P6004B ID+ IDTH2 P6301 TH1
L
P6000B
R
P6001B
C
P6002B
SR
NAAF-8397
NAAF-8391
BIAS R6045 SBL P6085 BIAS R6046 P6086 SBR ID+ ID-
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