Pioneer VSX-2016AV-S Service Manual page 203

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