LAMP COVER | PLUG ERROR [3X] {3 Blinks of Standby/Power LED}
Two situations can cause the 3X flash pattern.
Two situations can cause the 3X flash pattern.
- A problem with the lamp door positioning and closing of the door detector switch {T1-Board}.
- A problem with the positioning of the Lamp & Lamp Power Plug and closing of the power plug detector switch {T3-Board}.
The first step before replacing any parts is to check for proper positioning of the lamp door and power plug. Furthermore, check for damage to the following items:
- T1 & T3 boards Lamp Door switch & Lamp connector switch.
- Check lamp door is securely seated 7 undamaged.
- The door tab which depresses the detector switch.
- The lamp door detector switch.
- The lamp power plug.
- The lamp plug detector switch.
If the door, door switch, lamp or lamp switch are found damaged, then the appropriate component must be replaced. Replace, T1 or T3 board/s.
T1 Board > A-1123-096-A
T3 Board > A-1144-528-A
If the door, door switch, lamp, or lamp switch are found undamaged and all connections are secure then there must be a problem with the 'DE' microprocessor and the ASU | DSU assembly must be replaced.
ASU/DSU ASSEMBLY 50' > A-1152-715-A
ASU/DSU ASSEMBLY 60' > A-1152-714-A
FAN ERROR {4X}
The main objective when this error occurs is to determine which of the four fans have stopped rotating. Visually check the two rear exhaust fans first for rotation. Both fans should begin rotating immediately after the TV power button is pressed. Before replacing Fan-1 or Fan-4 for non rotating, check that the fans drive voltage is present at CN2301/pins 2&11. Because the the TV is shutting down, the voltages must be measured prior to shut down.
The drive voltages should be 6V each. If both drive voltages are present, replace the non-rotating fan. If either of the drive voltage is missing then there is a defective drive circuit on the ASU-board. Replace the ASU | DSU assembly.
The other two fans, (Fans 2 & 3) are not visually accessible, and therefore have to use the DC fan drive and feed back voltages to check fan operation.
Check the fan drive voltages at CN2301/pins 6&8. Check the fan feed back at CN2301/pins 5&7 on the ASU board. Follow the appropriate path for drive or feed back when troubleshooting.
The presence of fan drive voltage confirms that the drive circuits on the ASU-board are functioning properly, and confirms that the fan is receiving its operational voltage.
The level of the feed back voltage confirms that the fan is rotating. The fan feed back voltage is (0.05V) when the fan is rotating. If the fan is not rotating the feedback voltage will be greater than [1V]. Replace the appropriate fan if either feedback voltage is above [1V].
If both the voltages are at the proper level then the fans are rotating, however the DE microprocessor is not processing the information accurately. In this case, the problem is with the DE microprocessor. Replace the ASU/DSU assembly.
