Samsung HL-R4667W Service Manual page 51

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Troubleshooting
6-2-2 Protect Status
1. When the rear cover is opened
A sensor detects when the rear cover is opened and turns the set off and then into Standby mode.
If you close the cover or fix the switch, you can turn the set on by pressing the Power button on the unit or the remote control.
The set will then operate normally.
2. When the temperature sensor operates
When the set is overheated, the internal temperature sensor turns the set off and the set goes to Standby mode.
When the internal temperature of the set returns to a normal range, turn the power on by pressing the Power button on the unit or
the remote control. The set will then operate normally.
3. Attempting to turn the lamp on fails repeatedly
If turning the lamp on fails, the set automatically tries turning the lamp on 3 times. If all attempts fail, all LED's on the front panel
will blink. Check the lamp and the ballast and replace them, if necessary.
6-2-3 Troubleshooting by the Checksum
Using Checksum to determine an error is neither reliable nor convenient.
The checksum can only be used effectively during a S/W service repair.
The checksum will be the same if the S/W version loaded into the TV is the same.
As programs of the same version have the same checksum value, you can determine if the program has been properly
downloaded if you know the checksum of the version.
The following is required:
Factory Mode → Checksum → right button → checksum calculation → checksum output (ex: 0xab2b)
■ Examples
T_ROBOAKR1_1010 : Checksum = 0xab2b
T_ROBOAKR1_1014 : Checksum = 0x4faa
6-8
Published in Heiloo, Holland.
9/13/15
Samsung Electronics