HT-R940
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
T e s t - _
T e s t - 4 - 0 0
T e s t - 4 - 3 6
C l e a r
Turn off
Blinks
V e r . 1 . 0 1 / 0 6 2 2 2 A
<Ex.>
<Ex.>
T : 2 5 C / 7 7 F
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
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.
T e s t - 4 - 3 6
FM STEREO
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.
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-8779).
3. Exchange thermal sensor PC board ass'y (NAETC-8781).
Thermal sensor
1. Press and hold down
DISPLAY
button, then press
STANDBY/ON
button when the unit is powered on.
The microprocessor version will be displayed for 3 seconds.
2. Press
TONE
button while the version is displayed.
4. Press
STANDBY/ON
button.
T e s t - 4 - 3 7
FM STEREO
5. Press
+
(
TONE)
button and 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.
3. Confirm that the displayed temperature is /-20 C from the ambient temperature.
