STR-DG820 - Sony Audio Service Manual (repair manual). Page 4

CONNECTOR  AND  SPEAKER  BOARDS  DISCRIMINA-
TION
In this set, the CONNECTOR and SPEAKER baords have been 
changed in the midway of production. Repair after distinguishing 
each type set to doing the repair referring to the following.

Note: In 

suffi x-11/-12 and suffi x-13 of CONNECTOR board, the shape 

of the board is quite different. It is possible to distinguish in the 
form of the board.

If there is a malfunction, the display shows a 
message. You can check the condition of the 
system by the message. See the following table 
to solve the problem. 

• Irregular current is output from the 

speakers. The receiver will automatically
turn off after a few seconds. Check the 
speaker connection and turn on the power 
again.

For other messages, see “Message list after 
Auto Calibration measurement” (Refer to 
Operating Instructions) and “XM Radio 
messages list” (Refer to Operating Instructions).

Clearing the receiver’s memory may remedy 
the problem. Refer to this page “Reference 
sections for clearing the receiver’s memory”. 
However, note that all memorized settings will 
be reset to their factory settings and you will 
have to readjust all settings on the receiver.

Before using the receiver for the first time,
initialize the receiver by performing the
following procedure. This procedure can also 
be used to return settings you have made to
their factory defaults. 
Be sure to use the buttons on the receiver for 
this operation.

After “CLEARING” appears on the 
display for a while, “CLEARED” 
appears.
All the settings you have changed or
adjusted are reset to the initial settings.

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

 / to turn off the 

 /.

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