Technical data

1 Calibration Procedures

Calibration Security Code

26 E3632A Service Guide

4 Unsecure the power supply.

UNSECURED

The power supply is unsecured when you press the

key. You will see the above message from the

front panel for one second. The CAL MODE message is

displayed on the front panel after above message.

5 Turn off the calibration mode.

Turn off the power supply to exit the calibration mode.

To unsecure the power supply without the security code

To unsecure the power supply without the correct security

code (when you forget the security code), follow the steps

below. Refer to “Electrostatic Discharge (ESD)

Precautions” on page 51 before beginning this procedure.

1 Disconnect the power cord and all load connections from

front terminals.

2 Remove the instrument cover.

3 Connect the power cord and turn on the calibration mode

by pressing the Calibrate key while simultaneously turning

on the power supply, and then continue to hold the

Calibrate key for about 5 seconds until a beep is heard. Be

careful not to touch the power line connections.

4 Apply a short between the two exposed metal pads on

JP5

[1]

(located near U13). Refer to “Component locator

diagram for the main board assembly — top” on page 61.

5 While maintaining the short, press to move to the

security code and enter any unsecure code in the

calibration mode. The power supply is now unsecured.

Secure

Power

NOTE

To re-secure the power supply (following calibration), perform this

procedure again.

[1] For serial MY53xx6xxx, apply the short at JP12 (located near U36). Refer to

“Component locator diagram for the main board assembly — top (serial

MY53xx6xxx)” on page 63.

Secure