Troubleshooting Diagram Of The Power-On Malfunction - Nokia 9000i Service Manual

RAE/RAK–1N
Faultfinding/Disassembly
1 Troubleshooting Diagram of the Power–On Malfunction
2.1
NO
Check
PLLDIV24
PLL–circuit
YES
Bus ac tivity?
(D/A, R/W, CS)
YES
Check buzzer
connections
Program UCS–
7.1.1 Valid
Boot code in UC S–
YES
CPU, or UCS–
Flash fault
Page 8 – 12
2.
YES
OK?
3.
NO
Reset OK ?
4.
Error
NO
6. Reboot and PING
from the PCLocals
while in TestMode
7.1.2
Respond to
PING from host?
Flash
NO
NO
NO
RS–buffer
Flash?
YES
7.1.3
Activity in CPU
YES
NO
Activity in CPU
TxD0?
Technical Documentation
0.
Start
1.
NO
Vsys Check PDA
OK? power unit
NO
3.1
YES
CPU fault
5.
CPU related
beeps?
error beeps?
YES
NO
DRAM fault
7.
YES
Power On
7.1
OK!
actived?
7.2
NO
RxD0?
7.2.1
RS–buffer fault
7.3
YES
After Sales
1.1
3.1.1
YES
5.1
5.1.2
Original, 05/97