Pioneer Elite VSX-81TXV, Руководство по обслуживанию

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VSX-2016AV-S
203
5 6 7 8
5 6
7
8
C
D
F
A
B
E
C
D
A/D Converter
Check the parts and patterns
in the path.
IC481 (Pin 6)
Is the voltage
5 V?
No
Yes
Yes
Check the parts and patterns
in the path.
Check the parts and patterns
in the path.
IC401 (Pins 14,28)
D/A Converter
Is the voltage
5 V?
No
Check the parts and patterns
in the path from the COAX terminal.
IC301 (Pin 42)
COAX (Under side)
(1.65 V center, amplitude more than 0.2 Vp-p)
Can
observe digital
signal?
No
Yes
Check the parts and patterns
in the path from the COAX terminal.
IC301 (Pin 44)
COAX (Upper side)
(1.65 V center, amplitude more than 0.2 Vp-p)
Can
observe digital
signal?
No
Yes
Check the parts, patterns and FFC
in the path from the OPT IN terminal.
IC301 (Pins 1,3,5) REAR OPT IN (3 inputs)
(0 V
⇔
4 V)
Can
observe digital
signal?
No
Yes
Check the parts and patterns
in the path from the FRONT IN Assy.
IC301 (Pin 7)
FRONT OPT IN
(0 V
⇔
4 V)
Can
observe digital
signal?
No
Yes
CN901 (Pin 10)
Is the
voltage of analog
power 5 V?
No
Analog 5 V input
• When a sound is not out with the digital (COAX, OPT IN)
signal input.
→
Go to Step 4-1
• When a sound is not out with the analog signal input.
→
Go to Step 4-2
• When a sound is not out with the HDMI. (It is assumption
that failure diagnosis of HDMI assy completed)
When the source is DVD-A or PCM96k
→
Go to Step 4-3-1
When the source is compression or less than PCM48k
→
Go to Step 4-3-2
• When a sound is not out with the XM Radio.
→
Go to Step 4-4
No
Replace CN901.
Check the power output
of the main unit.
Yes Yes
Is there
any loose connection
at pin 10 of
CN901?
IC101 (Pin 142)
No
OSC1
No
Replace IC551
or X551.
Yes
Yes
IC201 (Pin 45)
OSC2
Step 3: Operating Master Clock
To Step 3
To Step 4
Is there
an operating master
clock signal
(20 MHz)?
Is there
an operating master
clock signal(20 MHz)
at IC551-pin 5?
Check the parts and patterns
in the path.
No
No
Replace IC551
or X551.
Yes
Yes
Is there
an operating master
clock signal
(20 MHz)?
Is there
an operating master
clock signal(20 MHz)
at IC551-pin 7?
Step 4: Audio Clock (Until Switch)
Check that changes by pulling out and inserting the
digital input lines. (Function is able to change the
assignment. Therefore it is not specified.)
Step 4-1: When a sound is not out with the digital
(COAX, OPT IN) signal input
• : KUXJ and KUXJCA types only