Document: After-sales Maintenance Service Manual
No.: T7**
Version: 3.0
Effective from: March15th, 2010
Page
of 14
KTC
1
After-sales Maintenance Service Manual
Date: March 2010
1. No power
2. Without light
Check 220V power supply voltage
and the contact of power socket
Check AC
(
220V
)
voltage and the
contact of CN101 socket.
Check +5V and +12V output from
embedded power supply for abnormity
Check +5V and +12V on
main board for abnormity
Replace power cord or power
socket
Check for open-loop of fuse,
or replace main board
Check main board of power supply for
looseness, open-loop and poor contact
YES
NO
YES
NO
YES
NO
When the indicator is on but there is no display, check remote control for
power-off, minimum brightness, contrast ratio, check high-voltage switchboard
controlled by main board for abnormity
Check the fuse on high-voltage board for
the supply of 12V
Check each triode of control part for
abnormity or replace main board
Replace high-voltage switchboard
Check fuse
YES
YES
NO
NO
Abnormal output v5V and +12V from
embedded power supply, replace embedded
power supply with the same model
Troubleshooting Procedure
31
Summary of Contents for 55C2U-DVB
Page 7: ...1 30 10 2 2 2 1 1 2 3 4 5 6 7 8 9 10 11 12 1 2 6...
Page 8: ...13 14 15 16 0 17 3 3 7 7...
Page 9: ...4 99 99 8...
Page 10: ...LCD LED 100 240V 30cm VCR 9...
Page 11: ...LCD LED 10...
Page 12: ...11...
Page 13: ...LED AOC AOC AOC AOC 12...
Page 14: ...4 CH 0 9 0 9 1 2 3 4 5 6 7 8 10 9 11 12 14 13 15 16 18 17 19 20 21 13...
Page 15: ...5m OK p q t u 21 20 14...
Page 16: ...5 LED 9 CH TV 15...
Page 17: ...1 2 p q 3 OK 16...
Page 18: ...6 1 9 2 OK p q ECO 1 u 2 OK 1 OK 2 1 2 OK 1 2 TV 17...
Page 19: ...PC PC u 4 3 4 3 16 9 4 3 16 9 4 3 16 9 TV 1 OK 2 OK 1 OK 2 OK 18...
Page 22: ...1 2 OK 3 WLAN 1 2 Wi Fi 21...
Page 23: ...7 1 2 OK 3 OK TV 1 1 2 3 2 1 2 OK 3 1 2 3 3 1 2 OK 3 4 OK 1 2 2 22...
Page 26: ...AOC AOC 1 2 2 2 5 5 3 50 200 200 4 M6 55 200 200 4 M6 25...
Page 27: ...10 AOC TV 0 26...
Page 28: ...HDCP HDMI HDMI HDMI Internet Internet HDMI HDMI 27...