STR-DH820 - Sony Audio Service Manual (repair manual). Page 4

An over current from the 

 (USB) port was 

detected. The receiver will automatically 
turn off after a few seconds. Check the 
iPhone/iPod or USB device, then unplug it 
and turn on the power again.

For other messages, see “Message list after 
Auto Calibration measurement”, “iPhone/iPod 
message list” and “USB message list”. 

If there is a malfunction, a message appears on 
the display panel. You can check the condition 
of the system by the message. If any problem 
persists, consult your nearest Sony dealer. 

Irregular current is output to the speakers, or 
the receiver is covered and ventilation holes 
are blocked. The receiver will automatically 
turn off after a few seconds. Check the 
speaker connection and turn on the power 
again.

Before using the receiver for the first time, 
initialize the receiver by performing the 
following procedure. This procedure can also 
be used to revert back to the factory default 
settings. 
Be sure to use the buttons on the receiver to 
perform this operation.

?/1 to turn off the 

?/1 for 5 seconds.

The “CLEARING” appears on the 
display panel for a while, then changes to 
“CLEARED !”.
Changes or adjustments made to the 
settings are now reset to the defaults.

?/1

Be sure to use the buttons on the receiver to 
perform this operation.

?/1 to turn off the 

?/1.

“S.F. CLEAR” appears on the display 
panel and all sound fields are reset to their 
default setting.

?/1

MUSIC

Depending on the position of the subwoofer, the 
measurement results may vary. However, there will 
be no problems even if you continue to use the 
receiver with that value.

Error Code 31
The SPEAKERS is set to off. Set to other speaker 
settings and perform the Auto Calibration again.

Error Code 32
None of the speakers were detected. Make sure that 
the optimizer microphone is connected properly 
and perform the Auto Calibration again. 
If the optimizer microphone is connected properly 
but the error code still appears, the optimizer 
microphone cable may be damaged.

Error Code 33
s None of the front speakers are connected or only 

one front speaker is connected.

s The optimizer microphone is not connected.
s Either the surround left or surround right speaker 

is not connected.

s Surround back speakers or front high speakers are 

connected even though surround speakers are not 
connected. Connect the surround speaker(s) to the 
SPEAKERS SURROUND terminals.

s The surround back speaker is connected only to 

the SPEAKERS SURROUND BACK/FRONT 
HIGH/BI-AMP/FRONT B R terminals. When 
you connect only one surround back speaker, 
connect it to the SPEAKERS SURROUND 
BACK/FRONT HIGH/BI-AMP/FRONT B L 
terminals.

s Either the front left high or front right high 

speaker is not connected.

Warning 40
The measurement process has completed with high 
noise level detection. You may be able to achieve 
better results if you try in a quiet environment again.

Warning 41
Warning 42
The input from the microphone is too big.
s The distance between the speaker and the 

microphone may be too close. Set them apart and 
perform the measurement again.

Warning 43
The distance and position of a subwoofer cannot be 
detected. This may be caused by noise. Try to 
perform the measurement in a quiet environment.

No Warning
There is no warning information.