Cobra 19 Plus, Manual

Page: 1 / 27

T A B L E O F C O N T E N T S
M odel 19 Plus
DESCRIPTION PAGE NUMBER
OPERATING THEORY- PLL FREQ. S Y N T H E S IZ E R ....................................................................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