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TTI TCB-550, Service Manual

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TTI TCB-550 Service Manual Download Page 7

 

2-3. SEMICONDUCTORS  AND  FUNCTION

 

REF.NO

*** MANUFACTURER INFORMATION ***

* K.E.C    --------------- KOREA ELECTRONICS SEMICONDUCTOR CO.,LTD.

* TOSHIBA -------------- TOSHIBA SEMICONDUCTOR CO.,LTD.

* SANYO  ---------------- JAPAN SANYO SEMICONDUCTOR CO.,LTD.

* SGS  --------------------- SGS THOMSON SEMICONDUCTOR CO.,LTD.

DESCRIPTION

RX

TX

REMARK

 

QR1
QR2
QR3
QR4
QR5
QR6
QR7
QQ1
QQ2
QQ4

QAS1
QAS2
QAS3
QAS4

QFS1
QFS2

QUS1
QRS1
QTS1

QG1
QG2
QG3
QG4
QG5

QHL1

QV1

QW1
QW2

QN1
QN2
QT2
QT3
QT4

Q1
Q2
Q3

IC1
IC2
IC3
IC4
IC5
IC6
IC7

KTC4080E
KTC4080E
KTC4080E
KTC4075E
KTC4080E
KTC4080E
KRA2014E

KRC410E

KTC4075E

KRC402E
KRC410E
KRA305E
KRC402E
KRC410E
KRC402E
KRC410E
KRC404E

KTC4075E
KTA2014E

KTA1658

KTA2014E

KRC401E

KTC3875S
KTC3875S

KRC402E

KTC4080E
KTC4080E
KTC4080E

KRC401E
KRA305E

KTC4080

2SC2314
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

RF ATTENUATOR

X
X
X
X

AM AUDIO PATH

FM AUDIO S/W

X
X
X

TX B+

TX POWER REGULATOR
TX POWER REGULATOR
TX POWER REGULATOR

MAIN REGULATOR

CPU REGULATOR

POWER HI/LOW S/W

VCO

BUFFER

DOUBLER

TX ENABLE

TX ENABLE B+

BUFFER
DRIVER

POWER AMP

LCD BACK LIT
LCD BACK LIT

CPU RESET

X
X

TX AM AUDIO AMP

EEPROM

CPU

PLL

TX FM AUDIO AMP

KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC
KEC

SANYO
SANYO

KEC
KEC
KEC
AUK
KEC

SGS

HOLTEK

TOSHIBA

SANYO

KEC

Summary of Contents for TCB-550

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

Page 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 ...

Page 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...

Page 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...

Page 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 ...

Page 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 ...

Page 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 ...

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 28: ...SECTION4 MECHANICAL DISASSEMBLY ...

Page 29: ......

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

Page 31: ...Main PCB Bottom side ...

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

Page 33: ...Front PCB Bottom side ...

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

Page 35: ...LED PCB Bottom side ...

Page 36: ...5 4 Volume PCB ...

Page 37: ...5 5 MIC PCB ...

Page 38: ...SECTION6 BLOCK DIAGRAM ...

Page 39: ...SECTION7 SCHEMATIC ...

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