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SERVICE
MANUAL


MULTI CHANNEL AM/FM TRANSCEIVER

TCB-550




TTI Tech
TABLE OF CONTENTS


SECTION 1 SPECIFICATIONS


SECTION 2 CIRCUIT DESCRIPTION
1 GENERAL
2 TECHNICAL DESCRIPTION
3 SEMICONDUCTORS AND FUNCTION
4 DESCRIPTION OF FREQUENCY DETERMINING AND STABILIZING CIRCUIT
5 TEST EQUIPMENT SETUP AND ALIGNMENT INSTRUCTIONS


SECTION 3 PART LIST


SECTION 4 MECHANICAL DISASSEMBLY


SECTION 5 BOARD LAYOUT
5-1 MAIN PCB
5-2 FRONT PCB
5-3 LED PCB
5-4 VOLUME PCB

5-5 MIC PCB




SECTION 6 BLOCK DIAGRAM


SECTION 7 SCHEMATIC
SECTION1 SPECIFICATIONS


Channel 40 (See the frequency band chart)
Frequency Range 26.56 MHz ~ 28.00 MHz
Operating mode F3E (FM), A3E (AM)
G
E Frequency Control PLL Synthersizer
N Frequency Tolerance 0.002%
E Operating Temperature Range -10 to + 55 C
R Microphone Plug-in Type
A
L Input Voltage 13.2V DC