Sony RDR-GX7 User Manual

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Self-diagnosis Function (When letters/numbers appear in the display)
Self-diagnosis Function 
(When letters/numbers 
appear in the display)
When the self-diagnosis function is activated to prevent the recorder 
from malfunctioning, a five-character service number (e.g., C 13 50) 
with a combination of a letter and four numbers appears on the front 
panel display. In this case, check the following table.
First three characters 
of the service number
Cause and/or corrective action
C 13
The disc is dirty.
, Clean the disc with a soft cloth (page 3).
C 31
The disc is not inserted correctly.
, Re-insert the disc correctly.
E XX
(xx is a number)
To prevent a malfunction, the recorder has 
performed the self-diagnosis function.
, Contact your nearest Sony dealer or local 
authorized Sony service facility and give 
the five-character service number.
Example: E 61 10