DEBUG MODE-2
DSP DEBUG MODE(2/3)
TX-SR806/SA806
1. This debug mode will be useful in digital audio no sound or sound
drop-out trouble.
2. Check information on FL display, then identify bad parts, and
replace or resolder it.
Trouble Shooting by DSP DEBUG MODE
Symptom on FL display
Cause of trouble
Remedy
"E" is displayed.
No input signal to DIR.
1. Find out which digital input does not work.
2. Confirm where the digital waveform stops
between the digital input and DIR.
3. Resolder pins of the bad part or replace it with
new one.
Note:
MPU is short for Micro Processor: Q1016.
1st DSP: Q3401, 2nd DSP: Q3501
DIR: Q1324
DAC: Q1421
Flash ROM: Q3451, Q3551
SDRAM: Q3461, Q3561
Audio Selector: Q5501
Displayed freq. is different
from input signal.
No input signal to DIR.
The sam as above.
The sam as above.
Displayed audio format is
different from input signal.
No input signal to DIR.
Digit No.
on FL
7
6
4
1
Content of display(Continued)
P = PCM (Analog)
D = Dolby Digital
d = DTS
S = DSD
p = Dolby
A = AAC
T = TrueHD
H = DTS-HD High Resolution
M = DTS-HD Master Audio
? = UNKNOWN
DSP Detect Format
13
o = Decode OK
x = Decode NG
DSP Decode
14
bit0 = NIC
bit1 = DEC
bit2 = BUSY
bit3 = Exec Wait
26 = Not Free
2F = Mute Control
FF = Free
DSP Port
10
Not Used(Slash)
9
-
DSP Sequence
11
12
04-0D = Boot
10-17 = Update Mode
20-33 = DSP Setting
FF
= Free
-
1st DSP Sequence
15
16
04-0D = Boot
10-17 = Update Mode
20-33 = DSP Setting
FF
= Free
-
2nd DSP Sequence
17
18
-
MPU MUTE Output Cause
27
27
28
28
-
Not Used
19
26
= Selector IC
= DSP
= Effector
= DIR
(Normal state)
(Abnormal
state )
bit0
bit1
bit2
bit3
= HDMI
= Auto Speaker Setup
= XM
= Speaker Config
bit4
bit5
bit6
bit7
8
CODEC CLOCK MODE
N = Normal
U = Up Sampling
H = High Sampling (Double Rate)
D = Down Sampling
Q = Quad Rate
-
These two figures are displayed
in hexadecimal form. If these are
transformed to binary form, each
bit indicates the IC which outputs
error and mute.
This figure is displayed in
hexadecimal form. If this is
transformed to binary form,
each bit indicates the following
DSP port status.
0 = 0 0 0 0
10 = 1 0 1 0
F = 1 1 1 1
bit0
bit1
bit2
bit3
Hexadecimal Binary
Translation
3. Remdies Written below are of typical case. So, more detailed check
may need in actual cases.
4. Before replace ICs below, resolder the pins first to save resources.
