User Guide

PAMS
Technical Documentation
NSE–8/9
Troubleshooting
Page 8
Issue 1 07/99
FLASH Programming
doesn’t work.
Check if fault information from
Prommer is one of the following:
a) MCU doesn’t boot
b) serial dataline failure
c) serial clock line failure
failure is one of the
above mentioned?
No
Yes
Connect watchdog disable
(WDDIS R424 ) to GND.
C117 (Vbb) is typ 2.8V
and
C102 (VXO) is typ 2.8V
?
Yes
Check WDDIS line:
X201 pin 11 –> R424
Line OK?
Faulty PCB
See section ”Phone is
totally dead”.
No
NoYes
Master RESET
(PURX R303) is ”1” (2.8V)
after ca. 62ms
Check sleep clock
(R118 end towards CCONT )
32kHz square wave
Check sleep clock circuit.
R121, R122, R123, R124,
C147, C148, C153, B100
and C149
No
No
Faulty N100 or
overloaded PURX line
Yes
13MHz clock
C301 towards MAD
500mVpp min.
Yes
B
Yes
RFC 13MHz
800mV min.
V702 collector
Check R727, V702,
R728, R714, G701
Check
R743 & C301
No Yes
No
A
C
Figure 4–3