Sylvania 6842THG, Service Manual

Page: 36 / 123

1-8-3 L0700TR
3. VIDEO AND AUDIO SECTION
FLOW CHART NO. 1
Video signal is not outputted normally.
Input video signal.
Are all input NG?
Replace the Digital CBA.
Does the picture appear on the screen?
When inputting video signal to HDMI In jack
(HDMI IN) or Tuner In (ANT. IN).
When inputting video signal to Video 1 In jack
(S-VIDEO1).
When inputting video signal to Video 2 In jack
(S-VIDEO2).
When inputting video signal to Video 1 In jack
(VIDEO1).
When inputting video signal to Video 2 In jack
(VIDEO2).
Is the video signal outputted to each pins on the
CN113 or CN114 of the Analog CBA?
CN113 Pin (4) VIDEO1-Y
CN113 Pin (5) VIDEO1-C
CN113 Pin (2) VIDEO1
CN114 Pin (21) VIDEO2-Y
CN114 Pin (22) VIDEO2-C
When inputting video signal to component 1 jack.
CN114 Pin (11) COMPONENT1-Y
CN114 Pin (13) COMPONENT1-Pb
CN114 Pin (14) COMPONENT1-Pr
When inputting video signal to component 2 jack.
CN114 Pin (16) COMPONENT2-Y
CN114 Pin (18) COMPONENT2-Pb
CN114 Pin (19) COMPONENT2-Pr
CN113 Pin (7) VIDEO2
No
No
No
No Check lines between Pins (4, 5) on CN113 and
JK702, and service it if defective.
Check lines between Pins (21, 22) on CN114
and JK708, and service it if defective.
Check lines between Pin (2) on CN113 and
JK701, and service it if defective.
Check lines between Pin (7) on CN113 and
JK707, and service it if defective.
No
Check lines between Pins (11, 13, 14) on
CN114 and JK703, and service it if defective.
No
Check lines between Pins (16, 18, 19) on
CN114 and JK704, and service it if defective.
Are serial data signal outputted to Pins (15 and
16) on CN1121 on the Digital CBA?
Replace the Plasma
Display Module.
Yes
No
No
Yes
Replace the Digital
CBA.
No
Replace the Digital CBA.
Yes
Yes