46
SC-09TX
1
2
3
4
A
B
C
D
E
F
1
2
3
4
NG
OK
NG
OK
OK
NG
NG
OK
OK
NG
OK
NG
OK
NG
OK
NG
Is the oscillation waveform (sine wave with about 450 kHz frequency, 1.5 to 2.0 Vrms)
output from the speakers when no signal is input?
Is the signal input to the AMP?
Is the speaker relay ON?
Is ± 5-V power supplied?
Is ± 12-V power
supplied?
Is muting canceled?
Is 24-V power supplied to the +24V_
Relay_Drive?
Is the +24V_Relay_Drive
controllable?
Check the
cables and
power supply.
Check the
cables and
power supply.
Check the
cables and
power supply.
Check the
cables and
power supply.
Failure in the
ICE POWER AMP Assy
Failure in the ICE
POWER AMP Assy
Failure in the
ICE POWER
SMPS Assy
Failure in the
ICE POWER
SMPS Assy
* How to confirm that 5-V/12-V power for the ICE is properly
supplied:
Check the ICE REG Assy.
Check the power supply to the ICE POWER AMP Assy.
Check OP-AMP power supply to the ICE INPUT 4CH Assy
and the ICE INPUT 6CH Assy.
* How to confirm that a signal is input to the ICE AMP block:
Check the cables.
Check the output from the ICE INPUT 4CH Assy and the
ICE
INPUT 6CH Assy.
* How to confirm that the speaker relay is activated:
Check if sound of relay operation is heard when the SP
Relay
ON/OFF key on the front panel is pressed.
If you come to this section because the power amp block is diagnosed as being in failure:
If only sound of a specific function or in a specific audio mode is not output, the defective block is not the ICEPOWER
block. The ICEPOWER block is diagnosed as being in failure only when sound of all functions is not output.
1
Set the speaker setting for all channels to Large.
2
Set ALL CH to Bi AMP.
3
Set the function to Multi Ch In.
4
Set the listening mode to Pure Direct (PCM Direct).
5
Fix the signal switch at Analog.
Diagnosis of the ICEPOWER Block
Summary of Contents for SC-LX90
Page 3: ...3 SC LX90 5 6 7 8 5 6 7 8 A B C D E F ...
Page 63: ...8 SC 09TX 1 2 3 4 A B C D E F 1 2 3 4 2 2 SPECIFICATIONS ...
Page 64: ...9 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F 2 3 PANEL FACILITIES ...
Page 65: ...10 SC 09TX 1 2 3 4 A B C D E F 1 2 3 4 ...
Page 66: ...11 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F ...
Page 67: ...12 SC 09TX 1 2 3 4 A B C D E F 1 2 3 4 ...
Page 68: ...13 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F ...
Page 69: ...14 SC 09TX 1 2 3 4 A B C D E F 1 2 3 4 ...
Page 130: ...75 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F ...
Page 148: ...2 SC 09TX 1 2 3 4 A B C D E F 1 2 3 4 SAFETY INFORMATION ...
Page 151: ...5 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F ...
Page 257: ...111 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F ...
Page 301: ...155 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F CN501 AK ...
Page 323: ...177 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F ...
Page 341: ...195 SC 09TX 5 6 7 8 5 6 7 8 A B C D E F E ASSY SIDE B T CN7851 ...