DTR-7.9
OPERATION CHECK-3
SPEAKER OUTPUT SENSOR AND THERMAL SENSOR
Test - _
Test - 4-00
Test - 4-37
Clear
Turn off
Test - 4-37
FM STEREO
Blinks
Main:
1. 01/08620A
<Ex.>
<Ex.>
V: 015 F:x S:H
T: 043
Clear
Turn off
Output sensor (Speaker out AC voltage)
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. DSP outputs 0 dBFs/1kHz audio signal to all power amplifiers.
4. At this time, confirm that the red characters of
" FM STEREO " is displayed and relays RL6901/RL6902 are switched off.
Test - 4-38
Test - 4-38
FM STEREO
5. Press TONE
+
button until
" Test-4-38 " is displayed. DSP outputs 0 dBFs/1kHz audio signal to some power amplifiers.
6. At this time, confirm that the red characters of
" FM STEREO " is displayed and relays RL6901/RL6902 are switched off.
7. Press ON/STANDBY button to finish.
[Procedure]
<Note>
No output. No input.
[When]
3. Exchange thermal sensor Q6380 or PC board ass'y (NAETC-9478).
Thermal sensor
1. Press and hold down
DISPLAY button, then press
ON/STANDBY button when the unit is powered ON.
The main microprocesor F/W version will be displayed only for 3 seconds.
2. Press
TONE
button while the version is displayed. The temperatures of the thermal sensors (Q6380) will be displayed.
3. Confirm that the displayed temperature is within +/-20 C from the ambient temperatures.
4. Press ON/STANDBY button to finish.
Unit is C
1. Exchange power transistors (Q6050 - 6056, Q6060 - 6066).
2. Exchange amplifier PC board ass'y (NAAMP-9477, NACLA-9493).
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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