DV-989AVi-S
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7.1.8 FAILURE-TEST METHOD FOR THE HDMI TRANSMITTER IC
• When replacing the DVDM Assy, see "7.1.10 DISASSEMBLY"
In a case where the HDMI video signal is not output
1
In a case where the HDMI audio signal is not output
Is the Pure Audio function turned ON?
(During Pure Audio mode, neither the HDMI signal nor the analog
video signal is output.)
Is the analog video signal output?
Turn the Pure Audio function OFF.
No
Yes
No
OK
NG
Yes
Are the audio signals properly output from the optical outputs
and coaxial outputs (S/PDIF)?
Yes
No
Probe R1058 (S/PDIF) and R1057 (22-/24-MHz clock) with an
oscilloscope, and check if correct signals are output. The HDMI
transmitter IC (audio processing block) may be in failure.
No
The lines from R1058 (S/PDIF) and R1057 (22-/24-MHz clock)
are in failure.
(The optical-output and coaxial-output lines are OK.)
Check if the HOME MENU or VCD playback picture is displayed
when this unit is connected to a PC monitor equipped with a
DVI input.
Purpose:
To check if the HDMI output line, including the
terminal, is in failure.
(An HDMI
↔
DVI conversion cable is required for checking.)
Failure test for the T-REX (IC1001: DVDM Assy)
Probe R1013-R1018 (22 ohms
×
4, 6 sets), and R1009 (27-MHz
clock) with an oscilloscope, and check if the amplitude of each
signal changes between H (3.3 V) and L during VCD playback
and if the 27-MHz clock is output correctly.
NG
No
The T-REX or the line between the T-REX and the HDMI
transmitter IC may be in failure (replacement of the T-REX,
failure in any of the above resistors, defective soldering, signal
short-circuiting, or broken wires, etc.)
Turn the Pure Audio function OFF.
Is the Pure Audio function turned ON?
(During Pure Audio mode, the HDMI audio signal is not output.)
Yes
Yes
Is this unit connected to DVI equipment?
(Only a video signal is available with DVI equipment.)
Replace the DVDM Assy.
Check if the initialization process for HDCP, etc. is OK by
connecting this unit with a Pioneer Plasma Display equipped
with an HDMI input.
Yes
OK
Replace the DVDM Assy.
Replace the DVDM Assy.
IC901 (DVDM Assy) and its peripheral circuits may be in failure.
No
The HDMI transmitter IC
(HDCP process block) may
be in failure.
The HDMI transmitter IC or
the line between the IC and
the output terminal may be
in failure.
The customer's monitor may not be compatible
with this unit. Confirm the name of manufacturer
and model of the monitor, and get a specific
description of the failure. Then look for an identical
case in a collection of past cases, or consult the
design section. In some cases, upgrading the
software or firmware for both the DVD player and
the monitor will solve the problem.
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
