Cobra 19 Plus User Manual

TABLE OF CONTENTS
Model 19 Plus
DESCRIPTION PAGE NUMBER
OPERATING THEORY- PLL FREQ. SYNTHESIZER....................................................................1-4
FREQUENCY CHART (TABLE 1)....................................................................................... . ..................5
BLOCK DIAGRAM..................................................................................................................................... 6
PLL CIRCUIT BLOCK DIAGRAM ............................. . ............................................................................7
ALIGNMENT PROCEDURE ................ 8-11
TEST EQUIPMENT SET-UP ................................................ 12
VOLTAGE CHART, IC’S & TRANSISTORS................................................... ..................................... 13
PARTS LAYOUT, PCB401068-F, TOP VIEW.......................................................................................14
COMPOSITE LAYOUT, PCB401068-F, TOP VIEW............................... . ......................................... 14
COMPOSITE LAYOUT, PCB 401377-C, 401261-B, TOP VIEW ........................................................ 14
PARTS LAYOUT, PCB401068-F, BOTTOM VIEW ........... .. .................................................................15
PARTS LAYOUT, PCB 401377-C, 401261-B, BOTTOM VIEW............................................................15
COMPOSITE LAYOUT, PCB401068-F, BOTTOM VIEW.....................................................................16
COMPOSITE LAYOUT, PCB 401377-C, 401261-B, BOTTOM VIEW...................................................16
COPPER PATTERN, PCB401068-F, BOTTOM VIEW.........................................................................17
COPPER PATTERN, PCB 401377-C, 401261-B, BOTTOM VIEW.......................................................17
WIRING DIAGRAM, CHASSIS & MIC PINS..........................................................................................18
PCB 401068-D WIRING DIAGRAM.........................................................................................................19
SEMICONDUCTOR PIN CONFIGURATION..........................................................................................20
I.C. DIAGRAMS, LM6416E, LC7131, TA7310P.....................................................................................21
I.C. DIAGRAMS, KIA7217AP, TL489CP, MC78L08CT ........................................................................... 22
EXPLODED VIEW PARTS LIST.............................................................................................................23
EXPLODED VIEW ................................................ 24
SCHEMATIC DIAGRAM..................................................................................................... 25
PARTS LIST........................................................ 25

Cobra 19 Plus Specifications

General

Brand	Cobra
Model	19 Plus
Category	Radio
Language	English