Motorola 38C V100 Service Manual page 44

Troubleshooting
Figure 24. Receiver VCO Band Select
40
In most cases, a reference board can be
L
used to compare signals.
PCS_SEL and DCS_SEL
(from Magic IC)
are present on Q1100
Pin 3 and Pin 1?
YES
-5V is present
on R103?
YES
RVCO_PCS and RVCO_DCS
are present on Q1100
Pin 4 and Pin 6?
NO
Check Q1100
See Note 1
MOTOROLA CONFIDENTIAL - PROPRIETARY
November 20, 2000
Check U200
NO
and Q100
See Note 1
Check U903
NO
and U904
See Note 1
Check for
YES
intermittent
operation.
See Note 1
Note 1: Check components for correct
orientation, cold solder joints, physical
damage, and functionallity.
Product Family 38C
000801-O
6881036B20