VSX-74TXVi
207
5
6
7
8
5
6
7
8
C
D
F
A
B
E
Diagnosis of the line from the composite video input to the HDMI video output
How to diagnose the line from the composite video input to the HDMI video output is explained here.
1. To forcibly input the composite signal to the video converter circuit, bypassing the signal-path switching IC, short-circuit
the following points with a jumper: *1
SERVICE A-1 on the COMPOSITE V Assy <-> SERVICE A-2 (See the photo below.)
2. If the video output from the COMPOSITE V Assy is to be monitored, connect a jumper between SERVICE B-1 and
SERVICE B-2 on the COMPOSITE V Assy. (See the photo below.)
3. Make the preparations described in "Preparations for diagnosis of the HDMI block and related systems."
4. Remove the S VIDEO Assy.
5. Connect between the HDMI connector fitting and the chassis, and between the composite connector fitting and the
chassis, separately. *2
6. Connect the output from the source equipment (DVD player, etc.) to the DVD INPUT (COMPOSITE) connector.
7. Connect between the HDMI OUT connector and a TV monitor. (When Step 2 above is performed, the monitor output
signal from the COMPOSITE OUT connector can be monitored.)
8. Set the INPUT SEL switch to DVD function.
Check that neither S-VIDEO nor COMPONENT is assigned to DVD function.
*1: Remove the wire used for short-circuiting after the diagnosis is finished.
*2: Be sure to connect between the HDMI connector fitting and the chassis, and the composite connector fitting and the
chassis, separately. Otherwise, operations will be unstable.
[Procedures]
[Appearance of diagnosing
the composite video]
[Tips]
In this diagnosis, the DIGITAL VIDEO CONVERSION setting (ON/OFF) in the AV PARAMETER settings is invalid.
HDMI OUT
COMPOSITE OUT
DVD INPUT
Connect a cable between the
composite connector and the
chassis.
Connect a cable between the HDMI
connector and the chassis.
COMPOSITE V ASSY
SIDE B
SERVICE
B-1
SERVICE
B-2
Output
Input
SERVICE
A-1
SERVICE
A-2
