OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
Test - _
Test - 4-00
Test - 4-37
Clear
Turn off
Test - 4-37
FM STEREO
Blinks
Ver. 0.50/05131a
<Ex.>
<Ex.>
T: 25 C/ 77 F
Clear
Turn off
Output sensor
1. Press and hold down the CD button, then press the
STANDBY/ON
button while the unit is Power ON.
" Test - _ " is displayed only for 5 seconds.
2. Press the
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-4-37 " is displayed.
4. At this time, confirm that the red characters of
" FM STEREO " is displayed.
And, check relay RL6901 and RL6902 are
turned off in 2 or 3 seconds.
5. Press the 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-8911).
3. Exchange thermal sensor PC board ass'y (NAETC-8913).
Thermal sensor
1. Press and hold down the
DISPLAY button, then press the
STANDBY button when the unit is power ON.
" Ver. 0.50/05131a " is displayed only for 2 seconds.
2. Press the
TONE
button while " Ver.0.50/05131a " is displayed.
3. Confirm that the displayed temperature is within +/-20 degree C from the ambient temperatures.
4. Press STANDBY/ON button.
HT-R640
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
To Next Page
Loading...
Need help?
General
