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Only for training and service purposes
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4. TROUBLE SHOOTING
START
Setup Test Equipment
Cell Power : –74dBm
GSM850 CH190 / EGSM CH60
PCS CH660 / DCS CH700
1. Check
Regulator Circuit
2. Check
DCXO Circuit
3. Check
Tranceiver Circuit
Re-download SW & CAL
CHECKING FLOW
Checking process of
Regulator & DCXO & Tranceiver
is same as Receiver part.
Fig4-19. TX components placement
5. Check
FEM & Mobile SW
4. Check
PAM Circuit
SW400
SW401
U400
U402
X400
FL400
Check.1
Check.5
Check.2
Check.4
Check.3U401
4.2.2 RF Transmitting Path Trouble Shooting
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