Panasonic EB-X70 - Call Status Checks and Connection Details

FAULT FINDING
PMCD030901C8 Section 8 Issue 1
Service Manual – 47 – Revision 0
The output measured at the coupler (U607) output should be ~20 dB below the power amplifier output:
Figure 8.3: GSM 1800 / GSM 1900 Coupler (U607)
Signal level at the RFIN connection of the Automatic Power Controller (APC) IC (U605):
Figure 8.4: APC IC (U605)
dBm
12
2
-8
-18
-28
-38
Coupler O/P, single-ended measurement
Start: 1.709200 GHz
Stop: 1.711200 GHz
1
10742-1
dBm
5
-1 5
-3 5
-5 5
-7 5
-9 5
APC I/P, single-ended measurement.
Start: 1.709200 GHz
Stop: 1.711200 GHz
1
10747-1
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