Nokia Customer Care
4 - Service Tools
Company Confidential
TFE-4/RV-1
Issue 2.0 Mar/2005
Copyright
©
2005 Nokia Corporation
Page 4-7
Company Confidential
AD-2 Power Adapter (Product Code: 0770632)
Introduction
The AD-2 (picture1) power adapter provides the TFE-4/RV-1 radio unit with the supply
voltage. In addition this device supports the following functions:
Testing of leakage current, Car Radio Mute-functionality.
The main power supply for the AD-2 is the ACW-4. It has to be connected into the main
power supply input.
Picture1: AD-2 Power Adapter
Operation Modes
The AD-2 power adpapter supports two modes:
Powertest (Sleep)-Mode:
This mode is active, if the ‘IGNITION’ switch is in status off and ‘POWERTEST’ switch is in
status on. In this mode the leakage current will be measured. If the leakage current is
higher than approximately 5mA, it will be indicated by a LED. Exact measurement of the
leakage current is supported by the banana jacks aside of the AD-2 box.
Operational-Mode:
This mode is active when the switch setting of Ignition-Switch is on and the Power test
switch is off. With activated Ignition the TFE-4/RV-1 device should start. During Flashing
this switch has to be on also.
Testing of basic functions is supported by some LEDs, e.g. a dedicated LED indicates that
the ACW-4 is connected to AD-2, a further LED checks the status of the CRM output. The
IGNS signal can be switched on and off manually.
During a call the CRM-line will be pulled down. This can be checked during GSM Go/
Nogo-Test. This will be indicated by a dedicated CRM-LED.