Motorola Professional GP640 Informations sur les services - Page 23

Parcourez en ligne ou téléchargez le pdf Informations sur les services pour {nom_de_la_catégorie} Motorola Professional GP640. Motorola Professional GP640 30 pages. Professional radio, power distribution and controller
Également pour Motorola Professional GP640 : Manuel de l'utilisateur (32 pages), Fiche technique (2 pages), Informations sur les services (28 pages), Informations sur les services (32 pages), Informations sur les services (26 pages), Informations sur les services (43 pages), Informations sur les services (30 pages)

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Motorola Professional GP640 Informations sur les services
1.0

Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)

Yes
B
Check 2nd LO Control Voltage at C3279
B
A
START
Bad SINAD
Bad 20dB Quieting
No Recovered Audio
A
udio
Yes
at pin 27 of
U3220?
No
Spray of inject 1st IF into
XTAL Filter
IF Freq: 45.1MHz
Audio
heard?
No
Yes
VCO
locked?
No
16.8 MHz
Yes
at pin 21
U3220?
No
Check FGU

TROUBLESHOOTING CHARTS

Check Controller
Check Q3270 bias
circuitry for faults.
Rotate Freq. Knob
Activity
on U3220
LVZIF_SEL
pin?
Yes
Before replacing U3220, check 2nd
VCO Q3270. Check VCO O/P level,
C3272, C3273.
Chapter 3
A
No
Check controller