Service manual

1-36 June 21, 2004
GENERAL NP88 FLEX
Troubleshooting
4. Ensure the pager is in self-diagnostic mode 5 (refer to "Self-Diagnostic Fea-
ture").
5. Install the alignment back cover on the pager.
6. Place the unit in theRTL-1005 RadiationTestFixture,modifiedwiththe RPX-
4687 Nest and Contact Flip-down Assembly.
7. MeasuretheacvoltageatM1withnoRFsignalapplied.Thenoiselevelreading
must be between -48 dBm and -65 dBm for a properly aligned/tuned receiver.
Takeover Measurements
Dueto theveryhighfrequenciesinvolvedatthefront endofthepager,a probewith
a shunt capacitance as low as 1 pF is someti mes sufficient to detune a circuit and
cause inaccurate readings. Refer to “Troubleshooting” i n the appropriate receiver
section of this manual for i n formation about the receiver-specific test points used
in this procedure.
1. Ensure a battery with a minimum output of 1.3 volts is installed in the pager.
2. Refer to Tables 1-9 and 1-10 for lists of recommended test equipment.
3. Refer to the applicable schematic waveform and voltage information in the
appropriate supplement.
4. Ensure the pager is in self-diagnostic mode 5 (refer to "Self-Diagnostic Fea-
ture").
5. Install the alignment back cover on the pager.
6. Place the unit in theRTL-1005 RadiationTestFixture,modifiedwiththe RPX-
4687 Nest and Contact Flip-down Assembly.
7. Set up the test equipment.