Sony KDS-R60XBR1 - 60" Rear Projection TV, Training Manual, Page: 76 / 122

TVP-21 73
4. Protection Circuits
Troubleshooting Flowchart Step Descriptions
Lamp Error (Lamp LED)
LAMP LED
Flashing
In most cases a flashing Lamp LED indicates a defective Lamp, and the
Lamp must be replaced. However, an open circuit in the high-voltage
cabling to the lamp will also case this failure indication. Therefore, before
replacing the lamp confirm that the cabling and connections are good
between the Lamp Drive board and the lamp.
Temperature Error (2X)
2X Flash
Pattern
(Temperature )
The TV first displays an error message (shown in Figure 4-6) before
shutting down and activating the 2X flash pattern. The error message
dialog box is displayed for approximately 1.5 minutes and then the TV
shuts down. The dialog give the owner the oppurtunity to set the TV to
“High Altitude Mode,” which will increase the fan speed.
Insert photo of the High Temperature error display
The main objective when a 2X flash pattern occurs is to determine which
of the following possible defects are causing the excessive temperature
condition.
1) Excessively ambient room temperature in the local area of the TV
2) Dust or objects blocking the ventilation areas on the TV
3) Excessive Lamp Operating temperature
4) Defective LM75 temperature detection IC
The first step is to check for proper ventilation and correct any abnormalities
that will cause the TV to operate at high internal temperatures.
Temperature Error Message
Figure 4-6