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ADMINISTRATIVE INFORMATION

[[]] Calibration Required

X Calibration NOT Required

PRODUCT LINE: GM

AUTHOR: WY

ADDITIONAL INFORMATION:

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 1of 7

Information Only

Service Note

U1273AX-06

U1273AX Handheld Digital Multimeter, 4½ Digit, IP54, OLED Display, -40°C

Serial Numbers: ALL

The Problem –Instructions to replace the OLED (Organic LED) display board for U1273AX.

Parts Required:

P/N Description Qty.

U1273-66501 Display Board, U1273AX 1

Supersedes:

NONE

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 2of 7

Situation:

Once you find that the OLED display of your Handheld Digital Multimeter (HHDMM) is dimmer than

usual or no display, and there is a beeping sound, replacing the OLED display board will solve the

problem.

If the beeper was disabled previously, you may connect your HHDMM to a PC by using an IR-USB

cable (U1173B) to check whether the unit can be detected by the Keysight Handheld Meter Logger

software. If the PC can detect the HHDMM, replacing the OLED display board will bring back the bright

display.

Follow the instructions below to replace the OLED display board.

Solution/Action:

1. Turn the knob of the rotary switch to OFF and disconnect test leads.

2. Wear clean and dry gloves on your hands and avoid touching any components except the

OLED display board.

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 3of 7

3. Loosen the 2 screws as shown below to remove the battery casing:

4. Loosen the 4 screws as shown below to remove the bottom cover:

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 4of 7

5. Remove the bottom cover carefully and unplug the buzzer wire.

6. To remove the PCA from the top cover, use a flat-head screwdriver and carefully remove the

PCA from the latch.

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 5of 7

7. Replace OLED display board by unscrewing the 4 screws.

8. Carefully assemble the PCA back to the top casing. Remember to plug in the buzzer wire.

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 6of 7

9. Install the back cover and the 4 screws to lock the compartment. Then install batteries.

10. Install the battery cover and the two screws to lock the battery cover compartment.

© Keysight Technologies 2015-2019

Information Only Service Note

Version 1.2 | October 10, 2019| Page 7of 7

After the OLED display board replacement, switch on your DMM and you will notice a bright display.

Revision History:

Date

Service

Note

Revision

Author

Reason for Change

10 October 19

01

WanYee

As Published