TX-SR506
DEBUG MODE-3
DSP DEBUG MODE-3
Trouble Shooting by DSP DEBUG MODE (Continued)
Interface between DSP and MPU is no good.
Connection from DIR to DSP is no good.
Interface between DSP and MPU is no good.
DSP Sequence is no good.
Communication between DSP and MPU
is no good.
Writing from MPU to DSP is no good.
DSP program does not run properly.
Flash ROM or SDRAM is no good.
The unit was powered off during DSP
firmware updating.
DSP program does not run properly.
Flash ROM or SDRAM is no good.
DSP program does not run properly.
Or audio clock to DSP is no good.
DSP setting is failured.
Input signal to DSP is no good.
a. No input signal to DSP.
b. Interface between DSP and MPU is
no good.
The IC outputs error to MPU.
Continue to display "1"
Continue to display "2"
Continue to display "3" to"7"
Continue to display "8" to "F"
Continue to display "03
"
Continue to display "05
"
Continue to display "09
" to "10
"
Continue to display "19
"
Display "21
" to "23
",
then return and signal format
indicator is flashing.
Continue to display "24
" to
"27
", or "40
" to "43
".
Continue to display "29
" to "32
"
Displayed audio encoding
format is different from input
signal.
"x" is displayed.
This identifies IC which outputs
error.
Digit No.
on FL
Symptom on FL display
Cause of trouble Remedy
7
10
9
11
The same remedy as 10 -b.
The same remedy as 9 .
The same remedy as 10 -b.
Check 8 items.
1. The same remedy as 10 -b.
2. Check the voltage of the power supply pin
of DSP.
3. Check the reset port and clock input of DSP by
oscilloscope, and find out bad part.
4. Flash ROM firmware is no good. Update.
5. DSP or MPU is broken. Replace MPU.
DSP is impossible to replace, so replace with
a new PC board.
1. Flash ROM firmware is no good, update.
2. Check DSPSDO pin of MPU by oscilloscope.
If no signal, find out bad part connected.
3. Flash ROM or SDRAM is no good, replace.
4. DSP or MPU is broken, replace the same
method as above 5.
1. Flash ROM firmware is no good, update.
2. Flash ROM or SDRAM is broken, replace.
Initialize the unit.
(Press STANDBY/ON button while pushing
VCR/DVR button when the unit is powered on.)
1. Flash ROM firmware is no good, upgrade.
2. Flash ROM or SDRAM is broken, replace.
1. Flash ROM program is no good, upgrade.
2. Flash ROM or SDRAM is broken, replace.
3. Check DSP drive clock freq. by oscilloscope.
If no signal, find out bad part connected.
4. Check audio clock to DSP by oscilloscope.
If no signal, find out bad part connected.
1. Flash ROM firmware is no good, upgrade.
2. Flash ROM or SDRAM is broken, replace.
1. Confirm where the digital waveform stops
between DIR and DSP by oscilloscope.
2. Q202, P8001 may relate.
3. Resolder pins of the bad part or replace it with
new one.
The same as above.
1. Confirm where the digital waveform stops
between MPU and DSP by oscilloscope.
2. P8001, P8002, P8003 may relate.
3. Resolder pins of the bad part or replace it with
new one.
Replace the IC chip.
DSP is impossible to replace, so replace with a
new PC borad.
8
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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