Onkyo TX-SR606 Service Manual page 98

DEBUG MODE-2
DSP DEBUG MODE-2
Content of Display (Continued)
7
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>.
bit 0 = NIC
bit 1 = DEC
bit 2 = BUSY
bit 3 = Exec Wait
8
DSP Sequence
00 - FE = Boot
2D = Mute control
FF = Free
9
DSP Detect Format
P = PCM (Analog)
D = Dolby Digital
d = DTS
A = AAC
S = DSD
p = Dolby Digital+
T = True HD
H = DTSHD High Resolution
M = DTSHD Master Audio
? = Unknown
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)
Symptom on FL display
Digit No.
on FL
1
"E" is displayed
4
Displayed frequency is different
from input signal.
6 Displayed audio format is
different from input signal.
(Normal state)
(Abnormal state)
Circuit No. Schematic Diagrams
SD-3
Q701
SD-7
Q201
Q301 SD-3
Q282 SD-7
Q281 SD-7
Q5501 SD-1
Cause of trouble
No input signal to DIR.
No input signal to DIR.
No input signal to DIR.
10 DSP Decode
o = Decode OK
x = Decode NG
11
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>.
bit 0 = Selector IC (Q5501)
bit 1 = Effector
bit 2 = DSP (Q201)
bit 3 = DIR (Q301)
<Fig-1>
Translation
Hexadecimal
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
Remedy
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.
TX-SR606
Binary
bit 0
bit 1
bit 2
bit 3