DTR-7.8
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
Te s t - _
Te s t - 4 - 0 0
Te s t - 4 - 3 7
C l e a r
Turn off
Te s t - 4 - 3 7
FM STEREO
Blinks
M a i n :
8 1 . 0 5 / 0 7 9 0 3 A
<Ex.>
<Ex.>
T: 3 0 / 3 0 FA N : -
C l e a r
Turn off
Output sensor
1. Press and hold down CD button, then press STANDBY/ON button while the unit is powered on.
" Test - _ " is displayed only for 5 seconds.
2. Press GAME/TV button while " Test - _ " is displayed.
The unit will be in the state of "
Test-4-00 ".
3. Repeatedly press TONE
+
button until " Test-4-37 " is displayed.
4.
At this time, confirm that the red characters of " FM STEREO " is displayed.
5. Press STANDBY/ON button.
[Procedure]
<Note>
No output. No input.
[When]
1. Exchange power transistors (Q6050 - 6056, Q6060 - 6066, Q6080 - 6086, Q6090 - 6096).
2. Exchange power amplifier PC board ass'y (NAAMP-9061, 9062, NACLA-9063 - 9069).
3. Exchange thermal sensor PC board ass'y (NAETC-9042, 9043).
Thermal sensor
1. Press and hold down DISPLAY button, then press STANDBY button when the unit is powered on.
The main microprocesor version will be displayed only for 3 seconds.
2. Press TONE button while the version is displayed. The temperatures of two thermal sensors(Q6380, Q6381) will be displayed.
3. Confirm that the displayed temperature is /-20 degree C from the ambient temperatures.
4. Press STANDBY/ON button.
Unit is C
