Motorola MTP700 Detailed Service Manual page 200

4.2 - 78
Open Loop Power Test (Cont.)
MTP700 Portable Radio / Detailed Service Manual
A
Is power <-4dBm?
Yes
Perform the following:
1. Visually check all components and solder connections around
LNODCT.
2. Check L808 and ODCT pins 34, 40, 53, 63 for 2.775Vdc_ODCT,
check pins 51, 52 for 5Vdc during TX slot; check ODCT pins 45, 46,
56, 57 for 2.3 Vdc during Tx slot.
Are all checks OK?
Yes
B
Check Tx line up from
No LNODCT U803 output till RF
ldmos driver U800 input,
replace damaged parts.
Perform the Open Looop Power
test again.
Replace damaged
No
components. Perform
the Open Loop Power
tuning and test again.
TRANSCEIVER 800 MHz