Integra DTR-7.7 Service Manual

DTR-7.7
OPERATION CHECK-4
CONTROL OF COOLING FAN
[Procedure]
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange power amplifier PC board ass'y (NAAF-8678, NAAF-8682).
3. Exchange thermal sensor PC board ass'y (NAETC-8680).
1. Confirm that the cooling fan doses not rotate at no audio input signals.
Test - _
Test - 4-00
Test - 4-36
Clear
Turn off
Blinks
2. Press and hold down
CD
button, then press
STANDBY/ON
button while the unit is Power ON.
" Test - _ " will be displayed.
3. Press
VIDEO 3
button while
" Test - _ "
is displayed.
The unit will be in the state of
" Test-4-00 ".
4. Repeatedly press TONE
+
button until
" Test-4-36 " is displayed. Then confirm that the
7. Press the STANDBY/ON
button.
Test - 4-37
5. Press TONE
+
button and
confirm that the cooling fan rotates in low speed.
cooling fan rotates in low speed.
Test - 4-39
6. Press
TONE
+
button two times and
confirm that the cooling fan rotates in fast speed.
4. Exchange cooling fan.

Integra DTR-7.7 Specifications

General

Brand	Integra
Model	DTR-7.7
Category	Receiver
Language	English