REAR SEAT ENTERTAINMENT SYSTEM Sound Signal Circuit between Video Terminal and Television Display

DESCRIPTION

This is the sound signal circuit from the video (video adapter) terminal to the television display assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - VIDEO [VIDEO ADAPTER] TERMINAL)

   
   

   1. Disconnect the W14 television display assembly connector.

   2. Disconnect the T1 video (video adapter) terminal connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition W14-18 (ADPI) - T1-8 (ADPG) Always Below 1 Ω W14-19 (SGN3) - T1-3 (VA-) Always Below 1 Ω W14-20 (L+) - T1-2 (VAL+) Always Below 1 Ω W14-21 (SNG6) - T1-7 (SG) Always Below 1 Ω W14-22 (R+) - T1-1 (VAR+) Always Below 1 Ω W14-18 (ADPI) - Body ground Always 10 kΩ or higher W14-19 (SGN3) - Body ground Always 10 kΩ or higher W14-20 (L+) - Body ground Always 10 kΩ or higher W14-21 (SNG6) - Body ground Always 10 kΩ or higher W14-22 (R+) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. CHECK VIDEO (VIDEO ADAPTER) TERMINAL

   
   
   1. 

      Text in Illustration

      *a	Component with harness connected (Video [Video Adapter] Terminal)

      Remove the video (video adapter) terminal connector still connected Click here.

   2. Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions as shown in the table below.

      Standard
      Tester Connection Condition Specified Condition T1-1 (VAR+) - Body ground External device playing, sound being produced Waveform synchronized with sound is output T1-2 (VAL+) - Body ground

   
   

   NG

   REPLACE VIDEO (VIDEO ADAPTER) TERMINAL Click here

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here