Pioneer VSX-LX50, Руководство по обслуживанию

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VSX-LX50
33
5 6 7 8
5 6
7
8
C
D
F
A
B
E
C
Check the parts and
patterns in the path.
Check the parts and patterns
in the path
f rom the COAX terminal.
I C301 ( Pin 42 ) COAX ( Under side )
( 1.65 V center, amplitude more than 0.2 V p-p )
Can
observe digital
signal?
N o
Y es
N o
Y es
Check the parts and patterns
in the path
f rom the COAX terminal.
I C301 ( Pin 44 )
Replace I C552.
Replace I C551.
COAX ( Upper side )
( 1.65 V center, amplitude more than 0.2 V p-p )
Can
observe digital
signal?
N o
Y es
Check the parts, patterns and FF C
in the path f rom the OPT IN terminal.
I C301 ( Pins 1,3,5 ) R E AR OPT IN ( 3 inputs )
( 0 V
⇔
4 V)
Can
observe digital
signal?
N o
Y es
Check the parts and patterns
in the path
f rom the F RO N T IN Assy.
I C301 ( Pin 7 ) F RO N T OPT IN
( 0 V
⇔
4 V)
Can
observe digital
signal?
N o
Y es
Check the parts and patterns
in the path
f rom the H D M I Assy.
I C301 ( Pin 48 )
H D M I S / P DIF IN
( 0 V
⇔
3.3 V)
Can
observe digital
signal?
N o
Y es
(D S D)
When the source is SAC D .
→
Go to Step 4-3-3
• When a sound is not out w ith the XM Radio.
→
Go to Step 4-4
• When a sound is not out w ith the USB (I t is assumed that
the f ailure diagnosis o f USB Assy has been completed. )
→
Go to Step 4-5
except KU models
I C101 B4 ( R138 )
N o
OSC1
N o
Y es
Y es
I C201 ( Pin 45 )
OSC2
I C301 ( Pin 30 )
OSC3
S tep 3: O perating Master C lock
To Step 4
I s there
an operating master
clock signal
( 24.576 MH z) ?
I s there
an operating master
clock signal ( 24.576 MH z)
at I C552-pin 4?
Check the parts and
patterns in the path.
N o
N o
Y es
Y es
I s there
an operating master
clock signal
( 24.576 MH z) ?
I s there
an operating master
clock signal ( 24.576 MH z)
at I C551-pin 5?
I s there
an operating master
clock signal ( 24.576 MH z)
at I C551-pin 2?
Replace I C551
or X551.
Replace I C551.
Check the parts and
patterns in the path.
N o
N o
Y es
Y es
I s there
an operating master
clock signal
( 24.576 MH z) ?
I s there
an operating master
clock signal ( 24.576 MH z)
at I C551-pin 7?
• When a sound is not out w ith the digital ( COAX, OPT IN)
signal input.
→
Go to Step 4-1
• When a sound is not out w ith the analog signal input.
→
Go to Step 4-2
• When a sound is not out w ith the H D M I . (I t is assumed
that f ailure diagnosis o f H D M I Assy has been completed. )
(I 2S path )
When the source is “dts H D Master Audio”, “ D olby True
H D ”, “PCM or LPCM at or above the sampling rate o f
88.2kH z ” or “LPCM Multi ch”.
→
Go to Step 4-3-1
( S / P DIF path )
When the source is “dts H D High Resolution Audio”, “dts
H D LBR”, “ D olby D igital Plus”, “2ch at or belo w the
sampling rate o f 48kH z) , or “other compression streams”.
→
Go to Step 4-1
S tep 4: A udio C lock (U ntil S witch )
When the source in the digital ( COAX, OPT IN) or the
H D M I path is “dts H D High Resolution Audio”, “dts H D
LBR”, “ D olby D igital Plus”, “2ch at or belo w the sampling
rate o f 48kH z ” or “other compression streams”.
Check that changes by pulling out and inserting the
digital input lines.
(F unction is able to change the
assignment. There f ore it is not speci f ied. )
S tep 4-1: When a sound is not out with the digital
(COA X, OPT IN) signal input
• : KUXJ and KUXJ / CA types only