User Guide

PAMS
Technical Documentation
NME–3
Troubleshooting
Page 9
Issue 1 10/99
Flashing not possible
The flash programming can be done via system connector X1.
In production, the first programming is done applying 12V flashvoltage to
TP610. In aftersales the Flashvoltage is generated by an on board regu-
lator.
The main differences between production flashing and aftersales flashing
are :
a) FLASH programming voltage is produced in a different way.
b) Signal routings are different.
The fault finding diagrams for production flash programming are shown in
figures 5 and 6.
The fault finding diagrams for aftersales flash programming are shown in
figures 7 and 8.
In flash programming error cases the flash prommer can give some in-
formation about a fault.
The fault information messages could be:
– MCU doesn’t boot
– Serial clock line failure
– Serial data line failure
– External RAM fault
– Algorithm file or alias ID don’t find
– MCU flash Vpp error
In cases that the flash programming doesn’t succeed there is a possibility
to check short circuits between the memories and the MCU (MAD2).
This test is useful to do, when the fault information is: MCU doesn’t boot,
Serial clock line failure or Serial data line failure.
The test procedure is following:
1. Connect the short circuit wire between the test points J229 and J230.
2. Switch power on to start selftest
3. If the voltage level in D600 PIN 134 is 2.8 V (”1”), the interface is OK. If
there is a short circuit, the voltage level in D600 PIN 134 stays low and
32kHz square wave signal can be seen in the lines which are already
tested.
Selftest behaviour can be seen on the next page.
Note this test can be found only short circuits, not open pins.
Also upper data lines (15:8) of flash circuit D602 are not included to this
test.