To Check The Front Panel; To Check The Lcd; To Check The Front Usb Port - Agilent Technologies E4980A Service Manual

To Check the Front Panel

Procedure
Randomly press the front panel keys to verify that they work normally.
Step 1. Press [System] -
Step 2. Use the cursor key to highlight the selection item to the right of "TEST No.".
Step 3. Select
Step 4. Press
Step 5. Randomly press the front panel keys. The key name of the pressed key is displayed.
Step 6. To exit the front panel test, press
[Return].
• If multiple keys fail to work, a problem in key function (keypad, key flex circuit) or
display interface board.
• If only a specific key doesn't work, check first if the key is subsided in the panel.

To Check the LCD

Procedure
Step 1. Press [System] -
Step 2. Use the cursor key to highlight the selection item to the right of "TEST No.".
Step 3. Select
Step 4. Press
Black, and White every 2 seconds.
Step 5. To exit the DISPLAY test, press
• If the LCD display has a problem, check the LCD and the display interface board.
• If the LCD is not illuminated with backlight, check the inverter board.

To Check the Front USB port

Procedure
Step 1. Plug a USB memory, formatted with FAT16 or FAT32.
NOTE The following USB memory can be used.
Complies with USB 1.1; mass storage class, FAT16/FAT32 format; maximum consumption
current is below 500 mA.
Recommended USB memory: Agilent 512 MB USB Flash memory (Agilent PN
1819-0195).
Use the prepared USB memory device exclusively for the E4980A; otherwise, other
Chapter 4
SELF TEST
using the or
4 KEY INCR+ DECR-
- .
EXECUTE TEST START
TEST STOP
SELF TEST
using the
5 DISPLAY INCR+
- . The whole of the LCD screen turns Red, Green, Blue,
EXECUTE TEST START
TEST STOP
Function Specific Troubleshooting
softkey.
three times consecutively, and then press
or softkey.
DECR-
, and then press [Return].
Troubleshooting
41