Uniden PB010, Service Manual

Page: 24 / 46

г о
О )
TYPICAL STAGE GAIN MEASUREMENTS
The following measurements will give the technicien some approximate gain figures for troubleshooting.
Measurement conditions: AM, no modulation except as noted, Vcc = 13.75 VDC. Measurements made with 50 MHz
1scope and 10X probe, and are peak-to-peak (p-p) except where noted. May vary + 20% by models.
PB010
PC999 PB042
TX RF AMPS IC9, Pin 5: IC7, Pin 5:
IC8, Pin 9:
1.5V p-p 1.5V p-p
2.0V p-p
■ TR47 Buffer: TR45 Buffer:
TR39 Buffer:
2.0V p-p Base,
1.0V p-p Base, 0.8V p-p Base,
2.5V p-p Collector
1.6V p-p Collector
1.0V p-p Collector
h. TR46 Pre-driver:
TR44 Pre-driver:
TR38 P.re-driver:.
2.0V p-p Base,
1.0V p-p Base,
0.90V p-p. Base,
15.0V p-p Collector 7.0V p-p Collector
2.3V p-p Collector
TR45 Driver:
TR43 Driver: TR37 Driver:
3.5V p-p Base,
5.0V p-p Base, . 2.0V p-p Base
17.0V p-p Collector
18.0V p-p Collector 8.0V p-p Collector
TR44 Final:
TR41/42 Finals: TR36 Final:
8.0V p-p Base,
7.5V p-p Bases, 4.0V p-p Base,
35.0V p-p Collector
40.0V p-p Collectors 35.0V p-p Collector
OSCILLATORS TR24, 10.24 MHz:
Pin 7, MB8719: TR19, 10.24 MHz:
2.50V p-p, Emitter 8.0V p-p
1.60V p-p, Emitter
TR29, 15 MHz: TR27, 15 MHz:
TR23, 14.55 MHz:
0.60V p-p, Emitter
0.35V p-p, Emitter 1.90V p-p, Emitter
• .TR30, Carrier, TR29, Carrier: TR24, Carrier:
1.0V p-p SSB, Emitter
1.0V p-p SSB, Emitter 1.6V p-p SSB, Emitter
PLL DOWNMIX Pin 2, MC145106
Pin 17, MB8719 Pin 2, MC145106 :
0.70V p-p
0.85V p-p 1.40V p-p
, ■ . -
f
'
AUDIO AMPS IC4, Pin 1:
IC4, Pin 1: . IC4, Pin 2:
1.5V p-p TX, loud whistle-,
2.0V p-p TX, loud whistle, »'■S1.0V p-p TX, loud whistle,
MIKE GAIN füll on. MIKE GAIN füll on. MIKE GAIN füll on.
IC8, Pin 9: IC6, Pin 5: IC501, Pin 5:
0.20V p-p sine wave, 0.25V p-p sine wave, 0.25V p-p sine wave,
lOOuV 30% mod. input siq. lOOuV 30% mod. input siq. lOOuV 30% mod. input siq.
AM MODULATOR TP7,8,9:
TP7,8,9: TP6,7,8:
8.0V p-p sine wave, 12.0V p-p sine wave, 8.0V p-p sine wave,
TX, loud whistle, TX, loud whistle,
TX, loud whistle,
MIKE GAIN max. MIKE GAIN max. ' . ■
MIKE GAIN max.