TX-SR506
DEBUG MODE-2
DSP DEBUG MODE-2
DSP Port
This figure is displayed in hexadecimal form.
If this is transformed to binary form, each bit indicates
the following DSP port status. Refeo to
<Fig-1>
.
7
Mute output device
This figure are displayed in hexadecimal form.
If these are transformed to binary form, each bit indicates
the IC which outputs error and mute. Refeo to
<Fig-1>
.
11
DSP Sequence
00 - FE
= Boot
2D
= Mute control
FF
= Free
8
bit 0
bit 1
bit 2
bit 3
0 = 0 0 0 0
1 = 0 0 0 1
2 = 0 0 1 0
4 = 0 1 0 0
8 = 1 0 0 0
Hexadecimal
Binary
DSP Detect Format
P
= PCM (Analog)
D
= Dolby Digital
d
= DTS
A
= AAC
S
= DSD
p
= Dolby
T =
True HD
H
= DTSHD High Resolution
M
= DTSHD Master Audio
?
= Unknown
DSP Decode
o
= Decode OK
x
= Decode NG
9
10
Translation
bit 0 =
NIC
bit 1 =
DEC
bit 2 =
BUSY
bit 3 =
Exec Wait
(Normal state)
(Abnormal state)
<Fig-1>
Trouble Shooting by DSP DEBUG MODE
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.
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.
<Note>
Function
MPU (Main microprocessor)
DSP
DIR and DAC
Flash ROM
SDRAM
Audio processor (Selector/ Volume)
Content of Display (Continued)
No input signal to DIR.
No input signal to DIR.
No input signal to DIR.
Displayed frequency is different
from input signal.
Displayed audio format is
different from input signal.
Cause of trouble
Remedy
4
6
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.
The same as above.
The same as above.
bit 0
= Selector IC (Q5501)
bit 1
= Effector
bit 2
= DSP (Q201)
bit 3
= DIR (Q301)
Schematic Diagrams
SD-3
SD-7
SD-3
SD-7
SD-7
SD-1
Circuit No.
Q701
Q201
Q301
Q282
Q281
Q5501
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