TX-SR876/SA876
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 7 1 . 0 2 / 0 7 9 0 3 A
<Ex.>
C l e a r
Turn off
Output sensor
1. Press and hold down
CD
button, then press
ON/STANDBY
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
ON/STANDBY
button.
[Procedure]
<Note>
No output. No input.
[When]
1. Exchange the power transistors (Q6050 - 6056, Q6060 - 6066, Q6080 - 6086, Q6090 - 6096).
2. Exchange the power amplifier PC board ass'y (NAAMP-9061, 9062, NACLA-9063 - 9069).
3. Exchange the thermal sensor PC board ass'y (NAETC-9042, 9043).
Thermal sensor
1. Press and hold down
DISPLAY
button, then press
ON/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.
4. Press
ON/STANDBY
button.
3. Confirm that the displayed temperature is /-20 C from the ambient temperatures.
<Ex.>
T: 2 2 / 2 3 F : -
V: 0 . 0 0 S E C : H
Unit is C