Integra DTR-7.7 Service Manual

DTR-7.7
CONTROL OF POWER SUPPLY (SPEAKER OUTPUT SENSOR AND THERMAL DETECTOR)
OPERATION CHECK-3
Test - _
Test - 4-00
Test - 4-36
Clear
Turn off
Test - 4-36
FM STEREO
Blinks
Ver. 1.01/06920a
<Ex.>
<Ex.>
T: 25 C/ 77 F
Clear
Turn off
Output Sensor
1. Press and hold down CD button, then press
STANDBY/ON
button while the unit is Power ON.
" Test - _ " will be displayed only for 5 seconds.
2. Press
VIDEO 3
button while
" Test - _ "
is displayed.
The unit will be in the state of
" Test-4-00 ".
3. Repeatedly press TONE
+
button until
" Test-4-36 " is displayed.
4. At this time, confirm that the red characters of
" FM STEREO " is displayed.
And, confirm that the relays (RL6901 and RL6902) are
turned off in 2 or 3 seconds. (FL+FR+C+SL check)
6. Press STANDBY/ON button.
[Procedure]
<Note>
No output. No input.
[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).
Thermal Detector
1. Press and hold down
DISPLAY button, then press
STANDBY button when the unit is power ON.
The main microprocessor version will be displayed only for 3 seconds.
2. Press
TONE
button while the version is displayed, then the temperature will be displayed.
3. Confirm that the displayed temperature is within +/-20 C from the ambient temperatures.
4. Press STANDBY/ON
button.
Test - 4-37
5. Press TONE
+
button and
confirm that
the red characters of
" FM STEREO " is displayed and
the relays (RL6901 and RL6902) are
turned off in 2 or 3 seconds as well as 4. (C+SR+SBL+SBR check)
FM STEREO

Integra DTR-7.7 Specifications

General

Brand	Integra
Model	DTR-7.7
Category	Receiver
Language	English