TM840 Service Manual
Contents
CONTENTS ............................................................................................................................................................................. II
CHAPTER 1. FOREWORD ........................................................................................................................................................ 1
1.1.
S
COPE OF
M
ANUAL
............................................................................................................................................................. 1
1.2.
S
AFETY
P
RECAUTIONS
.......................................................................................................................................................... 1
CHAPTER 2. PRODUCT CONTROLS .......................................................................................................................................... 2
2.1
P
RODUCT
C
ONTROLS
........................................................................................................................................................... 2
2.2
LED
I
NDICATOR
.................................................................................................................................................................. 3
CHAPTER 3. CIRCUIT DESCRIPTION ......................................................................................................................................... 3
3.1
RF
C
IRCUIT
....................................................................................................................................................................... 3
3.1.1
T
RANSMITTER
C
IRCUIT
........................................................................................................................................................ 4
3.1.2
R
ECEIVER
C
IRCUIT
.............................................................................................................................................................. 5
3.1.3
F
REQUENCY
G
ENERATION
U
NIT
(FGU) ................................................................................................................................... 6
3.1.4
GPS
C
IRCUIT
..................................................................................................................................................................... 7
3.2
B
ASEBAND
S
ECTION
............................................................................................................................................................ 8
3.2.1B
ASEBAND
S
YSTEM
............................................................................................................................................................. 8
3.2.2
P
OWER
S
ECTION
.............................................................................................................................................................. 10
3.2.3
A
UDIO PROCESSING
.......................................................................................................................................................... 11
3.2.4
C
ONTROL
P
ANEL
.............................................................................................................................................................. 12
CHAPTER 4. PC PROGRAMMING MODE ............................................................................................................................... 13
4.1
G
ENERAL
F
UNCTIONS
........................................................................................................................................................ 13
4.2
PC
P
ROGRAMMING
.......................................................................................................................................................... 14
4.2.1
P
ARAMETERS SETTING STEPS
............................................................................................................................................... 14
4.2.2
P
ROGRAMMING INSTALLATION STEPS
.................................................................................................................................... 14
CHAPTER 5. ASSEMBLE AND DISASSEMBLE INSTRUCTIONS ............................................................................................... 18
5.1
R
EMOVING THE FRONT PANEL FROM TRANSCEIVER
.................................................................................................................. 18
5.2
D
ISASSEMBLE OF MAIN BODY
.............................................................................................................................................. 19
5.3
R
EMOVE
RF
PCBA ........................................................................................................................................................... 19
5.4
D
ISASSEMBLE FRONT PANEL
................................................................................................................................................ 20
5.5
R
EMOVE
PCBA
FROM FRONT PANEL
..................................................................................................................................... 21
5.6
E
XPLODE
V
IEW
................................................................................................................................................................. 23
CHAPTER 6. ADJUSTMENT .................................................................................................................................................... 27
6.1
T
HE
R
EQUIRED
T
OOLS
....................................................................................................................................................... 27
6.2
F
REQUENCY
I
NSTRUCTION
.................................................................................................................................................. 27
6.2.1
I
NTRODUCTION TO
TX
M
ODULATION
S
ECTION
....................................................................................................................... 29
6.2.2
I
NTRODUCTION TO
R
ECEIVE
S
ECTION
.................................................................................................................................... 31
CHAPTER 7. MAIN TECHNICAL FUNCTIONS AND SPECIFICATIONS ........................................................................................ 33
CHAPTER 8. MAINTENANCE AND TEST EQUIPMENTS ........................................................................................................... 36
CHAPTER 9. COMMON FAULT PHENOMENON AND ELIMINATION METHOD ........................................................................ 37
II
Содержание TM840
Страница 1: ...TM840 Service Manual I ...
Страница 19: ...TM840 Service Manual Figure4 3 4 Click Next to keep on installation 16 ...
Страница 60: ...TM840 Service Manual Figure1 TM840 400 470MHz Mainboard Top Side PCB View 57 ...
Страница 61: ...TM840 Service Manual Figure2 TM840 400 470MHz Mainboard Bottom Side PCB View 58 ...
Страница 62: ...TM840 Service Manual Figure3 TM840 400 470MHz Keypad Board Bottom Side PCB View 59 ...
Страница 63: ...TM840 Service Manual Figure4 TM840 400 470MHz Keypad Board Top Side PCB View 60 ...
Страница 82: ...TM840 Service Manual Figure7 TM840 136 174MHz Mainboard Top Side PCB View 79 ...
Страница 83: ...TM840 Service Manual Figure8 TM840 136 174MHz Main Board Bottom Side PCB View 80 ...
Страница 84: ...TM840 Service Manual Figure9 TM840 136 174MHz Keypad Board Bottom Side PCB View 81 ...
Страница 85: ...TM840 Service Manual Figure10 TM840 136 174MHz Keypad Board Top Side PCB View 82 ...