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General

1-1. Receiver

Display : 40 Channels and other functions indication

Frequency Range : 26.965 to 27.405 [MHz]

Frequency Response : 300 to 2,500 [Hz]

Power Source : 13.2 [V] DC

Audio Output Load : 8 [OHM] Resistive

Audio Output : 4.0 [W] (or More)

Squelch : Adjustable from 0.2[uV] to 1 [mV]

Sensitivity :

FM : 20 dB [SINAD] under 1.0 [uV] or less

AM :10 dB [S/N] under 1.0 [uV] or less

Intermediate Frequency :

1st IF : 10.695 [MHz]

2nd IF : 455 [KHz]

1-2. Transmitter

Carrier Power(Conducted) : AM 1 [W] / FM 4.0 [W]

Current Drain ( 13.2 [V] Supply Voltage)

No Modulation : 1,100 [mA] (No Modulation)

Max Modulation : 1,400 [mA] (Full Modulation)

Modulation Capabilities

AM : +/- 90 [%]

FM : +/- 1.8 [KHz/Dev]

Spurious Radiation : Less then -74 [dBc]

Antenna Impedance : 50 [OHM]

Frequency Tolerance : 0.002 [%]

Содержание TCB-550

Страница 1: ...SERVICE MANUAL MULTI CHANNEL AM FM TRANSCEIVER TCB 550 TTI Tech Downloaded from www cbradio nl ...

Страница 2: ...N 4 DESCRIPTION OF FREQUENCY DETERMINING AND STABILIZING CIRCUIT 5 TEST EQUIPMENT SETUP AND ALIGNMENT INSTRUCTIONS SECTION 5 3 LED PCB 3 PART LIST SECTION 5 1 MAIN PCB 5 2 5 4 VOLUME PCB 5 5 MIC PCB FRONT PCB 4 MECHANICAL DISASSEMBLY SECTION 5 BOARD LAYOUT SECTION 6 BLOCK DIAGRAM SECTION 7 SCHEMATIC TABLE OF CONTENTS ...

Страница 3: ...ication is subject to change without prior notice T R A N S M I T T E R R E C E I V E R G E N E R A L 40 See the frequency band chart 26 56 MHz 28 00 MHz F3E FM A3E AM PLL Synthersizer 0 002 10 to 55 C Plug in Type 13 2V DC 15 124 W x 135 L x 37 H 655 g Antenna Connector Duty cycle 10 4 Watts 13 2V DC AM from 85 to 95 FM 1 8KHz 0 2KHz 300Hz to 3000Hz 50ohms Unbalanced More than 36dBm AM Full Mod 1...

Страница 4: ...iptions of Each Block 4 3 1 Introduction 4 3 2 Reference Frequency 4 3 3 VCO 4 3 4 Programmable Divider and its Control 4 3 5 Phase Detector and VCO Control 4 3 6 Transmitter Receiver Buffer AMP 4 3 7 Transmitter Doublers 4 3 8 Switching of Turning Capacitor in VCO 4 3 9 Receiver Local Oscillator Outputs 4 4 Frequency Stability 4 5 Description of other Circuits 4 5 1 Transmitter 4 5 2 Receiver 5 T...

Страница 5: ... 0 2 uV to 1 mV Sensitivity FM 20 dB SINAD under 1 0 uV or less AM 10 dB S N under 1 0 uV or less Intermediate Frequency 1st IF 10 695 MHz 2nd IF 455 KHz 1 2 Transmitter Carrier Power Conducted AM 1 W FM 4 0 W Current Drain 13 2 V Supply Voltage No Modulation 1 100 mA No Modulation Max Modulation 1 400 mA Full Modulation Modulation Capabilities AM 90 FM 1 8 KHz Dev Spurious Radiation Less then 74 ...

Страница 6: ...G TACT SWITCH Accessable Connectors Antenna Jack External Speaker Jack External Power Cord Microphone Jack Transmitter Power AMP VOLTAGE 12 5 V Current 820mA Transmitter DRIVER AMP VOLTAGE 12 5 V Current 130mA 2 2 Type of em 2 3 Frequency Range 26 965 MHz CH 1 27 405 MHz CH 40 2 4 RF Power Output AM FM 4 0 Watts 2 5 DC Input Voltage and Current With 13 2V DC Input to Power AMP FIRST IF 10 695 MHz ...

Страница 7: ...2SC2078 KRA226S KRC401E KRC404E DBL5019 KIA358F TDA2003 24WCO2J TMP86FM29UG LC7152 KIA358F RF AMP 1 st MIXER 1 st MIXER RF ATTENUATOR IF AMP IF AMP A N L SQ MUTE RF ARRENUATOR AUTO SQ S W FM MUTE AM B AM B CONTROL X X POP MUTE SQ CONTROL RX B X X X X MAIN REGULATOR CPU REGULATOR X VCO X X X X X X X LCD BACK LIT LCD BACK LIT CPU RESET FM 1F SQ CONTROL X EEPROM CPU PLL X X X X RF ATTENUATOR X X X X ...

Страница 8: ...fer amplifier Q302 into the first FET balanced mixer QR2 3 4 2 Basic Synthesis Scheme The crystal frequency 10 24MHz is divided by4069times to make 2 5KHz which is fed to one side of the phase detector The VCO output is divided by a programmable divider and fed to other side of the phase detector Pin 22 23 of IC6 The feedback loop is closed by passing the phase detector output through an active lo...

Страница 9: ...25 MHz CH 40 13 7025 MHz 26 965 MHz 27 405 MHz Since all frequencies are obtained from the crystal controlled PLL oscillator all outputs are coherent with the crystal oscillator frequency and matching the same percentage accuracy ...

Страница 10: ...27 165 3294 16 47 5433 13 5825 18 27 175 3296 16 48 5435 13 5875 19 27 185 3298 16 49 5437 13 5925 20 27 205 3302 16 51 5441 13 6025 21 27 215 3304 16 52 5443 13 6075 22 27 225 3306 16 53 5445 13 6125 23 27 255 3312 16 56 5451 13 6275 24 27 235 3308 16 54 5447 13 6175 25 27 245 3310 16 55 5449 13 6225 26 27 265 3314 16 57 5453 13 6325 27 27 275 3316 16 58 5455 13 6375 28 27 285 3318 16 59 5457 13 ...

Страница 11: ...s for each channel are set by the PLL clock PIN34 DATA PIN35 Enable PIN33 of IC5 Each input signal to control the PLL IC is done with the provided key input PIN 12 15 For each key input an internal code convert EEPROM provides the appropriate control to the programmable divider for that channel Since the change transmit and receive and additional BIT is required ar PIN 16 of IC5 to allow the ROM t...

Страница 12: ...bility First Mixer The output of VCO is injected through buffer AMP QW1 and than The emitter follower output through the emitter of 1 st mixer or 2 3 Second Mixer The output of 10 240 MHz oscillator circuit with X2 is injected into the if IC of IC1 Incoming if signal and 10 240 MHz signal are mixed inside the IF IC to 2 nd IF signal 455MHz FM audio signal are recovered with the way of quadrature d...

Страница 13: ...o audio power amplifier IC3 which drives modulation transformer TM1 The audio output at the secondary of TM1 is fed the modulating audui signals series with the B voltage to the collectors of driver QT3 and TX power AMP QT4 to modulate both these stages A portion of the modulating voltage is rectified with DM1 which controls QM2 and QM1 to attenuate the MIC input to MIC AMP IC3 The resulting feedb...

Страница 14: ...pped The way to recover the AM information audio is envelope detector Test Equipment Setup and Alignment Instructions 5 1 VCO voltage adjustment 5 1 1 Required Test Equipment 1 DC power supply 13 8VDC 3A 2 DC Voltmeter or Oscilloscope 3 RF attenuator 30dB 5 1 2 Alignment Procedure Step Test Item UUT setting Equipment setting Alignment point Spec 1 RX VCO voltage Channel CH1 UUT RX condition Others...

Страница 15: ...AM or FM mode 2 CB Unit TX condition Adjustment MIC PTT on Others Don t care Connect the equipment and UUT as shown on Figure 2 CTX1 27 185MHz 300Hz 2 TX Power Channel CH19 Function 1 AM or FM mode Adjustment DC power supply 15 6V Unit TX condition MIC PTT on Others Don t care Connect the equipment and UUT as shown on Figure 3 Max 4W LT1 LT2 If cannot get a power up to 4W adjust VR3 3 AM Modulatio...

Страница 16: ...ode 1W TX Bar FM mode 4W TX Bar 6 Half harmonic of the UUT Adjustment Channel CH19 Connect the equipment and UUT as shown on Figure 4 Spectrum 1 Reference Level 35dB 2 Span 50KHz Function 1 AM mode 2 CB Unit TX condition PTT on Others Don t care Adjustment 1 Carrier Level by spectrum Center Frequency 27 185MHz Spec 33 35dBm 2 Half Harmonic by spectrum Center Frequency 39 5925MHz Spec 100 dBm LT1 L...

Страница 17: ...2V 3A 7 8 ohm Dummy Load 5 3 2 Alignment procedure Step Test Item UUT setting Equipment setting Alignment point Spec 1 AM Audio output Adjustment Channel CH19 Connect the equipment and Function 1 AM mode 2 CB Unit RX condition Volume Optional Squelch Minimum Others Don t care UUT as shown on Figure 5 SSG setting 1 Freq 27 185MHz 2 AF 1KHz 3 RF level 47dBm 4 Modulation 30 LR1 L1 L2 L3 LR2 LR3 LR4 A...

Страница 18: ...e as step 3 SSG setting 1 RF level 107dBm 2 Others same as step 3 107dBm at 20dB S N if not align again 5 TIGHT Squelch Adjustment Connect the equipment and UUT as shown on Figure 5 SSG setting 1 Freq 27 185MHz 2 AF 1KHz 3 RF level 47dBm 4 Modulation 1 5KHz Channel CH19 Function 1 FM mode 2 CB Unit RX condition Volume Don t care Squelch Maximum Others Don t care RVQ1 Adjust until audio signal is a...

Страница 19: ...0 11 PART 142 473J 000 CHIP RES 0603 47KOHM 5 PHILIPS 29 00 12 PART 212 102B 3K0 CHIP CERAMIC CAP 0603 0 001UF X7R 16V 10 PHILIPS 2 00 13 PART 212 103B 3K0 CHIP CERAMIC CAP 0603 0 01UF X7R 16V 10 PHILIPS 1 00 14 PART 212 105F 3Z0 CHIP CERAMIC CAP 0603 1UF Y5V 16V 20 80 PHILIPS 2 00 15 PART 212 470C 6J0 CHIP CERAMIC CAP 0603 47PF NP0 50V 5 PHILIPS 2 00 16 PART 305 0226 000 CHIP TR KRA226S KEC 1 00 ...

Страница 20: ... PART 102 229J S00 FILM RES 2 2OHM 0 5W 5 ST 1 00 37 PART 102 331J S00 FILM RES 330OHM 0 5W 5 ST 1 00 38 PART 102 471J S00 FILM RES 470OHM 0 5W 5 ST 1 00 39 PART 112 100J S00 METAL OXID RESISTOR 10OHM 2W 5 ST 1 00 40 PART 142 000J 000 CHIP RES 0603 0OHM 5 PHILIPS 1 00 41 PART 142 100J 000 CHIP RES 0603 10OHM 5 PHILIPS 6 00 42 PART 142 101J 000 CHIP RES 0603 100OHM 5 PHILIPS 3 00 43 PART 142 102J 0...

Страница 21: ...0603 4 7KOHM 5 PHILIPS 8 00 64 PART 142 473J 000 CHIP RES 0603 47KOHM 5 PHILIPS 14 00 65 PART 142 474J 000 CHIP RES 0603 470KOHM 5 PHILIPS 1 00 66 PART 142 562J 000 CHIP RES 0603 5 6KOHM 5 PHILIPS 1 00 67 PART 142 563J 000 CHIP RES 0603 56KOHM 5 PHILIPS 1 00 68 PART 142 681J 000 CHIP RES 0603 680OHM 5 PHILIPS 1 00 69 PART 142 821J 000 CHIP RES 0603 820OHM 5 PHILIPS 1 00 70 PART 162 103V 000 TRIM P...

Страница 22: ...T 212 150C 6J0 CHIP CERAMIC CAP 0603 15PF NP0 50V 5 PHILIPS 1 00 91 PART 212 151C 6J0 CHIP CERAMIC CAP 0603 150PF NP0 50V 5 PHILIPS 4 00 92 PART 212 153B 3K0 CHIP CERAMIC CAP 0603 0 015UF X7R 16V 10 PHILIPS 1 00 93 PART 212 180C 6J0 CHIP CERAMIC CAP 0603 18PF NP0 50V 5 PHILIPS 1 00 94 PART 212 181C 6J0 CHIP CERAMIC CAP 0603 180PF NP0 50V 5 PHILIPS 1 00 95 PART 212 221C 6J0 CHIP CERAMIC CAP 0603 22...

Страница 23: ...TA1658 KEC 1 00 116 PART 302 2078 000 TR 2SC2078E SANYO 1 00 117 PART 302 2314 000 TR 2SC2314F SANYO 1 00 118 PART 305 0305 000 CHIP TR SWITCHING KRA305E KEC 2 00 119 PART 305 0401 000 CHIP TR KRC401E KEC 1 00 120 PART 305 0402 000 CHIP TR SWITCHING KRC402E KEC 4 00 121 PART 305 0404 100 CHIP TR KRC404 KEC 1 00 122 PART 305 0410 100 CHIP TR SWITCHING KRC410E KEC 6 00 123 PART 331 0358 A00 IC OP AM...

Страница 24: ...4 PART 406 5006 000 COIL SPRING 5X0 6X13 5T R 0 5UH FINE 1 00 145 PART 406 5008 000 COIL SPRING 5X0 8X8 5T R FINE 2 00 146 PART 406 5008 400 COIL SPRING 5 0RX0 8X4 5T FINE 2 00 147 PART 406 6008 000 COIL SPRING 6X0 8X5T R 0 225UH FINE 1 00 148 PART 410 0270 000 IFT COIL RF FREE TX 27MHZ TX1 FINE 2 00 149 PART 410 0271 000 IFT COIL 27MHZ B RX1 FINE 1 00 150 PART 410 0272 000 IFT COIL 27MHZ RX 7RC R...

Страница 25: ...71 PART 702 C5500 10A BOTTOM COVER SPC BLACK COATING 0 8t 1 00 172 PART 702 C5500 20A UPPER COVER SPC BLACK COATING 0 8t 1 00 173 PART 702 C7700 30A BRACKET SPK EGI 1 0T COATING DESHAN 3 00 174 PART 706 3008T BBH SCREW MACH 3X8L TAPTITE BLACK BH 9 00 175 PART 715 C650N 001 FELT SPK D65X0 3T BLACK 1 00 176 PART 715 R000D 024 FELT COVER 6x117x0 2t BLACK ONE SIDE DOUBLE TAPE 4 00 177 PART 718 R000D 0...

Страница 26: ...CK BH 5 00 198 PART 706 3010S BBH SCREW MACH M3X10L BLACK BH 4 00 199 PART 711 M30NI 000 NUT M3 Ni PLATED 4 00 200 PART 713 M30NI S01 SPRING WASHER M3 4 00 201 PART 719 R000D 040 CU TAPE 1 COPPER CU 41 7X9X0 1T 1 SIDE DOUBLE TAPE 1 00 202 PART 719 R000D 041 CU TAPE 2 COPPER CU 63 5X15X0 1T 1SIDE DOUBLE TAPE 1 00 203 PART 723 C4100 011 INSULATION WASHER PAPER 3 0 Red color 1 00 204 PART 723 C7700 0...

Страница 27: ...0 1 00 220 PART 817 0810 000 POLYBAG PE 80X100 1 00 221 PART 817 2230 000 POLYBAG PE 220X300 1 00 222 PART 820 C550 001 OWNERS MANUAL REV 01 1 00 223 PART 830 C550 001 NAME LABEL REV 01 PE 0 2T 35X20mm 1 00 224 PART 833 C550 000 CODE 39 SERIAL NO STICKER 20X25mm 2 00 225 PART 834 0001 000 WARNING LABEL 1 00 226 PART 834 0002 000 ROHS STICKER TTI 0 10 227 PART 836 C550 000 LCD PROTECTIVE SHEET 1 00...

Страница 28: ...SECTION4 MECHANICAL DISASSEMBLY ...

Страница 29: ......

Страница 30: ...Main PCB Top side SECTION5 BOARD LAYOUT ...

Страница 31: ...Main PCB Bottom side ...

Страница 32: ...5 2 Front PCB Top side ...

Страница 33: ...Front PCB Bottom side ...

Страница 34: ...5 3 LED PCB Top side ...

Страница 35: ...LED PCB Bottom side ...

Страница 36: ...5 4 Volume PCB ...

Страница 37: ...5 5 MIC PCB ...

Страница 38: ...SECTION6 BLOCK DIAGRAM ...

Страница 39: ...SECTION7 SCHEMATIC ...

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