User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 24
Issue 1 06/01
2.6 Accessory Power Output Troubleshooting
Accessory power output is connected to the system connector’s DCE_DTR pin
inside the device.Accessory power output can be tested with MJS–14 test jig
and Wintesla SW. There is a pushbutton called ACC VOLTAGE in MJS–14 test
jig which is used to connecting load to DCE_DTR pin of the system connector.
Following Figure 13 shows the connection in MJS–14 test jig (load side).
4.7µF
6.3V
47R
Pushbutton: ACC VOLTAGE
DCE_DTR
(pin 10)
In system
connector
Figure 13. ACC VOLTAGE test configuration in MJS–14 test jig
Figure 13 describes the ACC VOLTAGE test configuration in the MJS–14 test
jig. Status of the DTR signal in MADLinda is read by Wintesla SW. Test se-
quence in use is roughly shown in the following Figure 14:
.
DTR signal
Press
ACC VOLTAGE button
VACC_CTRL
control goes ON
VACC_CTRL cont-
rol goes OFF
Release
ACC VOLTAGE but-
ton
Figure 14. Test sequence
Figure 14 describes the test sequence and status of DTR line during Accessory
Power Output Testing . Accessory output voltage test in Wintesla asks the test
person to press ACC VOLTAGE button and keep it pressed. After that SW auto-
matically turns ON and OFF the accessory output voltage and gives the
passed/fail information. Wintesla SW gives guidance during this test.