Onkyo PR-SC886 Service Manual page 133

QQ
3 7 63 1515 0
DEBUG MODE-2
Content of display(Continued)
8 CODEC CLOCK MODE
N = Normal
U = Up Sampling
H = High Sampling (Double Rate)
D = Down Sampling
Q = Quad Rate
9 Not Used(Slash)
DSP Port
10
This figure is displayed in
hexadecimal form. If this is
transformed to binary form,
each bit indicates the following
DSP port status.
bit0 = NIC
bit1 = DEC
bit2 = BUSY
bit3 = Exec Wait
-
11 12 DSP Sequence
TE
L 13942296513
26 = Not Free
2F = Mute Control
FF = Free
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.
Digit No.
Symptom on FL display
on FL
"E" is displayed.
1
www
Displayed freq. is different
-
4 6
.
from input signal.
Displayed audio format is
7
different from input signal.
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13
14
15 16
(Normal state)
(Abnormal
state )
17 18
Cause of trouble
No input signal to DIR.
x ao u163
y
No input signal to DIR.
i
No input signal to DIR.
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2 9
8
DSP Detect Format
P = PCM (Analog)
D = Dolby Digital
d = DTS
A = AAC
S = DSD
p = Dolby Digital+
T = TrueHD
H = DTS-HD High Resolution
M = DTS-HD Master Audio
? = UNKNOWN
DSP Decode
o = Decode OK
x = Decode NG
-
1st DSP Sequence
04-0D = Boot
10-17 = Update Mode
20-33 = DSP Setting
FF = Free
-
2nd DSP Sequence
Q Q
3 6 7 1 3
04-0D = Boot
10-17 = Update Mode
20-33 = DSP Setting
FF = Free
Note:
MPU is short for Micro Processor: Q7001.
1st DSP: Q3401, 2nd DSP: Q3501, 3rd DSP: Q3601
DIR: Q3041
DAC: Q3701, Q3721, Q3741, Q3761, Q3781
Flash ROM: Q3451, Q3551, Q3651
SDRAM: Q3461, Q3471, Q3561, Q3661
Audio Selector: Q4029
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.
co
The sam as above.
.
The sam as above.
TX-SR876/SA876
9 4 2 8
-
19 20 3rd DSP Sequence
04-0D = Boot
10-17 = Update Mode
20-33 = DSP Setting
E0-E2 = Auto Speaker Setup
FF = Free
-
21 26 Not Used
-
27 28 MPU MUTE Output Cause
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.
bit0 = Selector IC
bit1 = Effector
28
bit2 = DSP
= DIR
bit3
bit4 = HDMI
bit5 = XM
27
bit6 = Auto Speaker Setup
bit7 = Speaker Config
1 5 0 5 8 2 9 9 4
0 = 0 0 0 0
10 = 1 0 1 0
F = 1 1 1 1
Hexadecimal
Translation
Remedy
m
9 9
2 8 9 9
Binary