Diagnosis Of The Dtbr Assy - Pioneer DVR-LX61D Service Manual

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5.3 DIAGNOSIS OF THE DTBR ASSY

1. The DTB (Digital Terrestrial Block) does not function
A
Only the signals from the DTB are not
output, even though other external input
signals are output.
Yes
No channel is displayed.
B
Yes
Is the Signal Check screen called from the
HOME MENU displayed?
C
Yes
Are Signal Strength and Signal Quality
Good (in green) or, in a rare case, Fair (in
yellow)?
Yes
D
IC106 and its periphery are likely to be
defective.
• Except when the local regulator is in failure, a power failure (blown a fuse, etc.) makes other input systems abnormal.
• If mosaic images are often displayed, check the items in [B].
E
F
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If other PCB assy and connections are
normal, the IC1001 and its periphery are
No
defective.
Only pay channels (channels that require a
CI module for receiving) cannot be
No
displayed.
Yes
In addition to [A], a failure in the CAM,
card, or the CI connector is possible.
Is the Software Update-Technical Info
screen called from the HOME MENU
No
displayed?
(The version is displayed)
Yes
Possible causes are the antenna cable,
ambient surroundings, the RF system from
No
the tuner to the TS input of IC106 via
IC313 and TS. = [B]
DVR-LX61D
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Possible causes are the antenna cable,
ambient surroundings, and a
No
stream-related problem.
= [A]
∗ On the screen in Test mode, NG- must be
displayed for the item DTB S.
Possible causes are a failure in upgrading
software, failure in communication
No
between CN102 and CN4701, and
defective IC106 and its periphery.
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