Onkyo TX-SR504 Service Manual page 7

OPERATION CHECK-5
DEBUG MODE-2
Trouble Cause Analysis by Debug Mode
This debug mode will help in analysing digital audio no sound trouble.
Check information on FL display and the related devices or circuits.
Digit no.
Symptom on Display
on FL
"E" is displayed
1
Displayed freq. is different
4
from input signal freq.
Displayed format is different
6
from input signal format
"04" or "11" do not change
8
to "FF"
Displayed format is different
9
from input signal format
10
"x" is displayed
11 This identifies IC which
outputs error
Cause
No input signal to DIR
No input signal to DIR
No input signal to DIR
ROM or RAM error
Input signal to DSP is no good
Interface between DSP and
Microprocessor is no good
The IC outputs error to main
microprocessor
TX-SR504/504E/8450
Check
Related devices from digital input to Q301
Related devices from digital input to Q301
Related devices from digital input to Q301
Q281, Q282 & related devices
Related devices from Q301 to Q201
Related devices from Q701 to Q201
Q5501, Q201, Q301 & related devices