Check 7, Any Error Code On Led - Agilent Technologies 4349B Service Manual

Check 7, Any Error Code on LED?

1. Turn o the 4349B.
2. Turn on the 4349B while watching LEDs on the A2 CPU Board Assembly.
3. Check if the LEDs light in the sequence shown in Figure 4-9.
4. If LEDs light as the sequence, replace the LCD Assembly, otherwise (possibly, \HALT"
doesn't turn o or \BERR" lights) replace the A2 CPU Board Assembly.
When replacing the A2 CPU Board Assembly, refer to \Replacing the A2 CPU
Note
Board Assembly" in Chapter 3 for handling the ROM and EEPROM on the A2
Assembly.
Figure 4-9. CPU Board Assembly LED Light Sequence
T roubleshooting 4-13