User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 7
Issue 1 06/01
S Check visual display faults
S Check that all connectors make good contacts
– this might be the problem if the displays are dark or partially dark or if there
are keyboard problems.
Locate failed module (BL8, UL8, DL2) with the MJS–14 test jig.
This is the basis of further troubleshooting.
S Check the failed module(s) visually:
– mechanical damages?
– solder joints OK?
Continue with the specific troubleshooting procedure for the module:
S If there is an obvious fault, repair it before reflashing the device
S Flash first if a fault is not obvious
– Flashing troubleshooting leads to power checking and serial interface
checking if flashing does not start.
– At the beginning of flash programming, all memory interfaces are first
tested
– If flashing is aborted and error(s) return, refer to Memory testing section.
Due to CSP packages short–circuits or broken solder joints are not easily seen.
If the examined signal seems to be continuously in low or high level, then mea-
sure for possible short–circuit to ground (signal low) or to supply voltage (signal
high). Note that if a problem is not found from any visible contact/component it
can be under the CSPs where the signal is connected.
If there is no short circuit and the signal level is continuously at a low level, then
the following faults are possible:
– contact problem in output soldering (output active)
– contact problem in soldering of pin having internal pull–up (tri–stated signals)
Care must be taken when assembling and disassembling the transceiver. Re-
fer to the instructions in this manual. Failure to do this may result in unneces-
sary damage to the device.
The PDA display must be calibrated after the following actions have been tak-
en:
– RAE–3 has been flashed
– PDA display or DL2 module has been replaced
Note: The last step in service before returning the RAE-3 to the customer is to
set the RTC running time to 10 hours.
– Service battery BBL-3B does that automatically.
– Always use only the BBL-3B service battery with Wintesla.