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Contents

SPECIFICATIONS........................................................................................................................... 1

INSTRUCTIONS BEFORE USE.................................................................................................... 4

VZ‐28 CIRCUIT DESCRIPTION................................................................................................ 7

VZ‐28 BASIC OPERATION.......................................................................................................10

1. BUSY CHANNEL LOCK...................................................................................................10

2. VOX SENSITIVITY........................................................................................................... 10

3. TX POWER......................................................................................................................... 10

4. SQUELCH LEVEL.............................................................................................................10

5. BEEP SETTING..................................................................................................................10

6. TIME OUT TIMER(TOT).................................................................................................10

7. CTCSS/DCS.........................................................................................................................10

8. WIDE/NARROW BAND....................................................................................................10

9. EMERGENCY CALL........................................................................................................ 10

10. BATTERY SAVE...............................................................................................................10

11. END ROGER..................................................................................................................... 11

12. LOW BATTERY WARNING...........................................................................................11

13. CABLE CLOINE.............................................................................................................. 11

14. PTT ID TRANSMIT MODE............................................................................................11

15. THE SIDE KEY CAN BE PROGRAMMED THE FUNCTIONS AS FOLLOW......11

EXPLODED VIEW&MISCELLANEOUS PARTS.................................................................... 12

VZ‐28 SERIES SPARE PARTS.................................................................................................. 13

VZ‐28 PARTS LIST..................................................................................................................... 14

VZ‐28 BLOCK DIAGRAM.........................................................................................................26

VZ‐28 SCHEMATIC DIAGRAM...............................................................................................27

VZ‐28-D0-5 136-174MHz COMPONENTS VALUE................................................................ 30

VZ‐28-D0-5 136-174MHz BITMAP...........................................................................................32

VZ‐28-G6-4 400-470MHz COMPONENTS VALUE...............................................................34

VZ‐28-G6-4 400-470MHz BITMAP...........................................................................................36

VZ‐28-F6-4 350-390MHz COMPONENTS VALUE.................................................................38

VZ‐28-F6-4 350-390MHz BITMAP...........................................................................................40

VZ‐28 PCB BOARD.....................................................................................................................42

VZ‐28 GUIDELINE OF TROUBLESHOOTING.................................................................... 46

Motorola solutions Mag One VZ-28-D0-5 User Manual

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