Diagnosis Of The Dtbr Assy - Pioneer DVR-540HX-S Service Manual

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7.1.10 DIAGNOSIS OF THE DTBR ASSY

QQ
The DTB (Digital Terrestrial Board) does not function
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A
Only the signals from the DTB are not
output, even though other external input
signals are output.
Yes
No channel is displayed.
Yes
B
Is the Signal Check screen called from the
HOME MENU displayed?
C
Yes
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Are Signal Strength and Signal Quality
Good (in green) or, in a rare case, Fair (in
D
yellow)?
Yes
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
• If the audio from only the DTB is defective, check the items in [B] and the line from the audio output from IC106 (analog output section) to
the JACB input section.
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Only pay channels (channels that require a
CI module for receiving) cannot be
No
displayed.
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)
Failure in the line from the AV output from
IC106 (analog output section) to the JACB
input section
Possible causes are the antenna cable,
ambient surroundings, the RF system from
No
the tuner to the TS input of IC106 via
IC313 and IC201, and TS.
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Possible causes are the antenna cable,
ambient surroundings, and a stream-
No
related problem.
Yes
∗ 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 CN2601, and
defective IC106 and its periphery.
Yes
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= [B]
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3
4
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= [A]
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