Sirius Troubleshooting - Pioneer SX-LX70SW Service Manual

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5.4 SIRIUS TROUBLESHOOTING

QQ
3 7 63 1515 0
A
Troubleshooting
• This flow is the diagnosis method when there is no reception or no sound output.
• It is assumed that there is no loose connection or damage in the LCRs.
• Refer to Block Diagram beside the Schematic Diagram about the signal flow.
Step 1: Preliminary connecting confirmation
Confirm the following items before checking
Is SIRIUS CONNECT
B
TUNER is surely connected
to SIRIUS RADIO JACK
?
Yes
Is an AC Adapter
is surely connected to
SIRIUS CONNECT TUNER
?
Yes
C
Is an ANTENNA
is surely connected to
SIRIUS CONNECT TUNER
?
Yes
TE
L 13942296513
To Step 2
Step 3: Reception/Sound Confirmation
Perform a reception test, using a
free-of-charge channel 184,making this
unit an SIRIUS Radio input source.
D
Switch to Antenna Aiming mode at SIRIUS menu.
Signal strength indicator
No
Is the indication
OK?
E
Yes
L, R OUT
IC1601 (Pins 1, 7)
No
Is an ANALOG
OUPUT signal?
www
Yes
to DSP TROUBLESHOOTING Step 4-2 : When a sound is not
out with the analog signal input
F
44
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2
No
Tighten the connection.
No
Tighten the connection.
No
Tighten the connection.
DISPLAY
Does the reception becomes
OK by relocating the antenna
near a window?
No
Check the parts and patterns
in the path.
Replace IC1601.
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y
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SX-LX70SW
2
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3
8
Step 2: Power
IC1601 (Pin 8)
Is the voltage
around 12.0V?
Yes
To Step 3
Q Q
3 6 7 1 3
Yes
Check the commucination
lines "SIRIUS TX, RX, RESET"
between SIRIUS Connector(JA1601) and
DIGITAL RADIO u-COM(IC5201).
The SIRIUS CONNECT TUNER
may be defective.
u163
Or confirm again the Antenna
and AC adapter.
.
3
4
2 9 9 4 2 8
OP AMP
No
Check the parts and patterns
in the path.
1 5 0 5 8 2 9 9 4
Yes
Check the parts and patterns
in the path.
m
co
4
9 9
2 8 9 9
No