Samsung CS29Z30SPBXBWT Service Manual page 69

Troubleshooting
6-1-1 Basic Approaches for Troubleshooting
■ Troubleshooting Mechanism :
- The Main Board has Power part which supplies power to Deflection and Feature Box.
- The Feature Box receives all signal inputs,the signal-processed signal is sent to CRT Ass'y.
- Deflection and Focus are controlled by the Deflection Board.
■ Troubleshooting by Modules
1) Enter Service Mode
(In SET Stand-By Status,if you press "Info"→"Menu"→"Mute" and "Power" button in sequence on the remote control, the
screen is turned on and the Service Mode screen appears.)
2) Check if the System Board is out of order.
Press OPTION → TEST PATTERN → Right direction key:
The COLOR BAR, BLACK pattern and WHITE pattern are displayed on the screen.
If the pattern is not displayed or is displayed abnormally, the DNIe IC (SPD41) or the System Board is out of order.
3) Check if the Power Board, which supplies power to the System Board and the Deflection Board, is out of order.
If you cannot turn the screen on by pressing the POWER ON/OFF button or the screen repeatedly turns on and off when
pressing the POWER ON/Off button, check if the Power Board is out of order. (Refer to the circuit diagram)
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.
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