Samsung CW29M066V7XXEC, Service Manual, Page: 65 / 115

Troubleshooting
6-2 Samsung Electronics
6-1-1 Basic Approaches for Troubleshooting
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Troubleshooting Mechanism :
- 6-1 Check to determine whether the display is operating properly using the troubleshooting procedures.
- When the master switch is turned on, the secondary side of the power transformer supplies power to the Deflection/F-BOX.
- The F-BOX receives all signals, and processed signals are sent to CRT Ass'y. The Deflection/Focus is controlled by the
Main Board.
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Troubleshooting by Modules
1) Check if the main secondary side voltage is abnormal.
Check if the master switch works, if the screen turns on and off by using the Picture ON/OFF switch, if the screen
repeatedly turns on and off, and if the power port, which is output from the Stand-By circuit and the Micom, is normal.
(
☞
See the circuit diagram in the Service Manual)
2) Check if the Deflection Block is out of order.
Check if the Deflection Block is out of order when a picture is displayed abnormally, i.e. when the picture curls up
horizontally, shrinks horizontally or vertically, or extends horizontally or vertically.
(
☞
See the circuit diagram in the Service Manual)
3) Check if the F-box Block is out of order
Check if the F-box Block is out of order when the display or sound is out of order or the unit malfunctions even if the unit
is turned on properly (
☞
See the circuit diagram in the Service Manual)
4) Check if the Deflection Board is out of order.
When the screen is not properly displayed and the left or right side of the picture is shrunk, or the top or bottom of the screen
is expanded or shrunk, check if the Deflection Board is out of order.