DTR-4.6
ADJUSTMENT AND CONFIRMATION PROCEDURES 1
Idling current adjustment
Before Idling current adjustment, turn the trimming resistors R6040 to R6046 to counter-clockwise.
Connect the DC voltmeter at the sockets P6080 to P6084 via the carbon resistors 100 ohm 1/4W.
After turn POWER to ON, adjust the trimming resistors R6040, R6041 and R6042 so that the reading of
voltmeter becomes 2.5 mV. (Front and center channels)
Adjust the trimming resistors R6043, and R6044 so that the reading of
After adjustment, attach the top cover.
voltmeter becomes 1.5 mV. (Surround and surround back channels)
Confirm the voltage of points above after about five minutes.
Front and center channels
When less than 9.0 mV, readjust the resistors above so that the voltage becomes 9.0 mV.
When 9.0 mV to 11.0 mV, you are not necessary to adjust.
When more than 11.0 mV, readjust the resistors above so that the voltage becomes 11.0 mV.
Surround and surround back channels
When less than 6.0 mV, readjust the resistors above so that the voltage becomes 6.0 mV.
When 6.0 mV to 8.0 mV, you are not necessary to adjust.
When more than 6.0 mV, readjust the resistors above so that the voltage becomes 8.0 mV.
Note: No load and No signal
Confirmation of protection circuit
1. Confirmation of operation of speaker relay
Confirm that the speaker relays turn ON approximate 5 seconds after the power switch is turned ON.
Confirm that the speaker relays turn OFF immediately after the power switch is turned OFF.
2. Confirmation of DC detection circuit
Press and hold down CD button, then press STANDBY/ON button to set the unit to "Test- 1".
After "Test- 1" on the FL tube light on, press DVD button to set the unit to "Test- 1-00".
Apply DC 1.5 to 3.5V to the MULTI-CH INPUT terminal with no load.
Confirm that the speaker relay turns OFF.
Apply DC -1.5 to -3.5 V to the MULTI-CH INPUT terminal with no load.
Confirm that the speaker relay turns OFF.
Caution: Don't apply DC voltage more than 1 sec..
ID+
ID-
Test point
DC voltmeter
Jig terminal
100 ohm
1/4watts
JL6600A
P6000A
P6080
R6040
P6001A
P6081
R6041
P6002A
P6082
R6042
P6003A
P6083
R6043
P6004A
P6084
R6044
JL6603A
P3102A
P3101A
JL6200A
NAAF-8678
P6952A
U06
P3103A
P3104A
P3105A
P5004B
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