Pioneer SX-LX70SW Service Manual page 36

1
QQ
3 7 63 1515 0
A
G
Check the following points when the source is
Muiti ch.
IC101 P11 (R126(3)) DT1O
Is there
No
a audio data
(with Sch source)?
B
Yes
IC201 (Pin 80)
Is there
No
a audio data
(with Sch source)?
Yes
IC101 P12 (R126(2)) DT2O
Is there
No
C
a audio data
(with Cch source)?
Yes
TE
IC201 (Pin 58)
L 13942296513
Is there
No
a audio data
(with Cch source)?
Yes
D
IC101 P13 (R126(1)) DT3O
Is there
No
a audio data
(with SBch source)?
Yes
IC201 (Pin 59)
Is there
No
a audio data
E (with SBch source)?
Yes
To Step 7
www
F
36
1
http://www.xiaoyu163.com
2
Is there
No
abnormality at the
parts and patterns
in the path?
Failure in 1st DSP block,
Go to Step 8.
Is there
No
abnormality at the
parts and patterns
in the path?
Replace IC201.
Is there
No
abnormality at the
parts and patterns
in the path?
Failure in 1st DSP block,
Go to Step 8.
Is there
No
abnormality at the
parts and patterns
in the path?
Replace IC201.
Is there
No
abnormality at the
parts and patterns
in the path?
Failure in 1st DSP block,
Go to Step 8.
Is there
No
abnormality at the
parts and patterns
in the path?
Replace IC201.
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y
. i
SX-LX70SW
2
http://www.xiaoyu163.com
3
8
Step 7: Audio Clock (from 2nd DSP to the MODU-
LATOR input)
IC701 (Pin 21) DARST
Is the
No
voltage of reset
input 3.3 V?
Yes
IC751 (Pin 21)
Is the
No
voltage of reset
input 3.3 V?
Yes
IC701 (Pins 23,24) LSSDA, LSSCL
(33D)
Is the
No
control signal visible
when the delay amount
is changed?
Yes
IC751 (Pins 23,24)
Is the
Q Q
No
3 6 7 1 3
control signal visible
when the delay amount
is changed?
Yes
IC291 (Pin 12) MCLK
Is there
No
a master clock input
(24.576 MHz)?
Yes
IC291 (Pin 11) MCK3
Is there
No
a master clock output
(24.576 MHz)?
Yes
IC291 (Pin 9) MCLK
Is there
No
an operating master
clock signal
(24.576 MHz)?
Yes
MCLK4
IC291 (Pin 8)
u163
Is there
No
an operating master
.
clock signal
(24.576 MHz)?
Yes
H
3
4
2 9 9 4 2 8
No
Check the path to
the microcomputer.
Replace IC701
or IC751.
No
Check the path to
the microcomputer.
Replace IC701
or IC751.
(35D)
Is there
No
abnormality at the
parts and patterns
in the path?
Replace IC701
or IC751.
Is there
1 5 0 5 8 2 9 No 9 4
abnormality at the
parts and patterns
in the path?
Replace IC701
or IC751.
Is there
No
abnormality at the
parts and patterns
in the input path?
Replace IC291.
Is there
No
abnormality at the
parts and patterns
in the output path?
Replace IC291,
IC701 or IC751.
Is there
No
abnormality at the
parts and patterns
in the input path?
Replace IC291.
m
co
Is there
No
abnormality at the
parts and patterns
in the output path?
Replace IC291
or IC3101.
4
9 9
2 8 9 9