Failure Judgment Of The Hdmi Transmitter Ic - Pioneer CB-A802 Service Manual

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7.1.10 FAILURE JUDGMENT OF THE HDMI TRANSMITTER IC

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• See "7.6 DISASSEMBLY" when replacing the DVDM Assy.
When the DVI video signal is not output
Is the analog video signal output?
Does the monitor support HDCP?
Purpose:
To check if there is any problem with the HDMI output line
(including the connectors.)
Failure judgment of the T-REX (IC1001: DVDM Assy)
Probe R1013-R1018 (22 ohms × 4, 6 sets) with an oscilloscope
to check if the amplitude of the waveform of each signal during
TE VCD playback changes between H (3.3 V) and L. Also probe
L 13942296513
R1009 (27-MHz clock) to check if the 27-MHz clock signal is
properly output.
Failure in the T-REX or the line between the T-REX and IC1001
(Failure in the resistors mentioned above, defective soldering,
short-circuited signal, broken cable, etc. Replace the T-REX.)
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A failure in IC901 (DVDM Assy) or its peripheral circuits
is suspected.
Check if there is any problem with the initialization processes,
including HDCP initialization. (Connect a Pioneer plasma
Yes
display that is equipped with the HDMI input for checking.
The HDMI-DVI conversion cable is required for the connection.)
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The monitor owned by the user may not be
compatible with the unit. Check the maker of the
monitor, model name, and detailed information on
the failure, and check past similar cases or consult
the Design Department. In some cases, upgrading
of software and/or the firmware of the DVD player
and the monitor may solve the problem.
A failure in ICs in the HDCP
process block is suspected.
Failure in IC1001 or the line
OK
between IC1001 and the
Q Q output terminal
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DVD-V8000
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9 4 2 8
OK
Replace the DVDM Assy.
Replace the DVDM Assy.
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