User Guide

PAMS
Technical Documentation
NSE–8/9
Troubleshooting
Page 6
Issue 1 07/99
Check voltage at
pin 3 of V105
< 0,4 V
Measure voltage
at V105 pin 15
app. 1.25 V
No
Yes
Yes
No
Check
L102, V101 and
circuitry arround
V109
Check capacitors C109
to
C113 and coil L103
> 3.1 V
Switcher
Check feedback circuitry
R102, R105, R112
and arround
V108. Or replace V105
Check voltage at
C109
Yes
Check L103 and
capacitors
C111 to C113
No
less than 4,8 V
No
Switcher feedback
somehow faulty
check circuitry arround
V105, V108, V109
Figure 4–2
4.2. Flash programming doesn’t work
The flash programming can be done via panel connector X201 or via service inter-
face J100 - J105.