HT-R940
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.
Symptom on Display
Cause
Check
"E" is displayed
No input signal to DIR
Related devices from digital input to Q301
Displayed freq. is different
from input signal freq.
No input signal to DIR
Related devices from digital input to Q301
Displayed format is different
from input signal format
No input signal to DIR
Related devices from digital input to Q301
"04" or "11" do not change
to "FF"
ROM or RAM error
Q281, Q282 & related devices
Displayed format is different
from input signal format
Input signal to DSP is no good
Related devices from Q301 to Q201
"x" is displayed
Interface between DSP and
Microprocessor is no good
Related devices from Q701 to Q201
This identifies IC which
outputs error
The IC outputs error to main
microprocessor
Q5501, Q201, Q301 & related devices
Digit No. on FL
10
9
11
8
6
4
1
