TCB-660 service manual(00) _071210
Contents
1. 5805 R82 47K Jerk JMIC U D EEE loj T i DATA nor VOLUME 1 rence T COPLL EN 3 10 HARNESS WIRE 22 za JTX_INH c PWR_LOW 6 9 a 1 a 903 6902 19011 0901 sec PA bm 03 1038 T103P IN5402 H lt 3 BANDI WI MAIN_ B secs MC MAIN ES 3 CO 8AND2 Ro je EE stas GND BANDS sece um m m 5 4503 1506 6 8uH u FD MC Lock CD naue 103550954 0953 09520951 09660965 c E FWR LON TE UTBAB3 51 UAEG TE pst u LE r PATH TITLE 660 602 APPROVED 6501 6502 Lesos Le n 1 MC SOCKET 203 140 T1032. 15045 Automatic Noise Level Control 0181 KTC3875S KEC RX RF Mute at TX Mode 0182 KTC3875S KEC AGC Q183 KTC3875S KEC AGC Q201 KRC101S KEC AF Mute 0202 KRC202S KEC AF Path 0233 KTA1504S KEC Automatic Level Control Q234 KTC3875S KEC Automatic Level Control 0301 KTC3880S KEC 0302 KTC3880S KEC RX TX VCO Buffer 0303 KTC3880S KEC VCO Buffer 0305 KRC101S KEC TX VCO Control 0311 KRC101S KEC RX Bandl Switching 0312 KRC101S KEC RX Band2 Switching 0313 1015 RX Band3 Switching 0502 KTC3875S KEC FM TX AF Mute at AM TX Q701 KTC3880S KEC TX Doublers 0702 KTC3880S KEC TX Pre Amplifier 0703 KTC1006 KEC TX Driver Amplifier 0704 2SC2078 SANYO TX Power Amplifier Q742 KTC3875S KEC TX RF Mute at RX Mode Q801 KRC101S KEC CPU Reset 0802 KRC101S KEC CPU RX TX Control 0803 KRAIOIS KEC MIC Lock Control Q911 KTA1658 KEC Main Regulator 0912 15045 Main Regulator 0913 KRC112S KEC Main Regulator Control 0914 KRC102S KEC Power Low Control 0921 KTC3875S KEC 8 2V Regulator 0923 KTC3875S KEC RX B 0924 KRA1504S KEC TX B TTI 2007 02 2 TCB 660 Circuit Description Page 6 Q951 KTA1241 KEC Back Light LED Control 0952 KTA1241 KEC Back Light LED Control 0953 KRC101S KEC Back Light LED Control 0954 KRC101S KEC Back Light LED Control 0961 KRC110S KEC TX AF Mute at RX Mode 0962 1115 MIC Path at AM Mode 32 IC Ref No Description Manufacturer Function IC101 TK144889V TOKO IF IC IC102 K
3. 4p 020 714 1702 t104 L105 L106 L107 L701 C741 L108 XF102 8 C143 x101 SQ ADJ a 0332 CF101 1301 C124 1109 112 VCO_TP CT301 C167 C306 c210 D 0161 x301 102 1060 1205 208 1201 D232 B GND T201 C215 9 1901 C207 RV231 AM MOD ADJ C232 C233 _ D 6960 e 021 C407 c912 C913 C408 can D e O APC ADJ RV911 B 8 E RV401 c FM MOD ADJ C923 C921 C933 8 C931 0821 1503 2 2 1 C954 C953 El 2 a a 9 564 2968 Main PCB Bottom side D FAN Jig m Te Main PCB Bottom Silk Front PCB Top Silk LCD801 5 wo e o I o uoi 1956 NV2S W3 Nv Front PCB Bottom Side JE mi RE c Mi Front PCB Bottom silk 108 660 FRONT PCB 274 00 0802 75106 Ejus EEE fool 784 5 iw Ho R851 0980 5 3 Volume PCB Top Side VR101 50101 SECTION6 BLOCK DIAGRAM ANT Me __ RF AMP ST MIXER L 0101 2102 0103 AMP SPK 0461 0162 AGC 102
4. 6 8UH LALO3TB6R8K L706 COIL SPRING 2 5X0 8X7T R 0 11UH L704 COIL SPRING 4X0 5X6T R L712 COIL SPRING 4X0 5X7T R L713 COIL SPRING 4X0 5X10T R L714 COIL SPRING 6X0 8X5T R 0 225UH L711 COIL SPRING 5X0 6X13 5T R 0 5UH L707 CORE SPRING 5 5TX0 45XM5E X2 3 0 17UH L103 L104 L105 COIL CHOKE 6UH BOBBIN CORE L201 TRANSISTOR 2SC2314F Q703 TRANSISTOR KTA1241 Q951 Q952 DIODE 1N4004T R 400V 1A D232 D901 DIODE 1N60 D161 CRYSTAL 10 240MHz 32PF 30PPM HC 4 D TRON D TRON X101 CRYSTAL 4 50MHZ 12PF 30PPM HC 4 D TRON D TRON X301 FILTER CRYSTAL 10L08A 10 695MHZ 49 1 31 D TRON D TRON XF101 FILTER CERAMIC LT455HTW D TRON D TRON CF101 JACK DC PJ 3074A HENGRONG HENGRONG J202 WIRE STRIP D0 8 L20 mm JP1 WAFER 2PIN PH 2A 180C FINE FINE J205 WAFER 6PIN PH 6A 180C FINE FINE J503 WAFER Mechanical PARTS 10PIN PH 10A 180C FINE FINE A NN gt a of a a gt J102 COVER ASS Y 1 BOTTOM COVER COATING SAME AS TCB770 DESHAN 1 2 UPPER COVER SPC BLACK COATING 0 SAME AS TCB770 DESHAN 1 3 1 01 COATING SAME AS TCB770 DESHAN 3 For spea
5. 0182 0185 ALC SQUELCH 0233 0234 01027 SCAN TX FM RX AM FM LIMITER LOCK EMG 401 0401 BUFFER M 2214 BUFFER T 0202 CPU LPF 16801 DOUBLER kr DRIVER LPF 0701 9703 amu TO CPU B 2V REG 0971 BACK LIGHT LED CONTROL 095170954 AM B TTI Tech ON OFF 0923 0163 BS ST TITLE TCB 770 BLOCK DIAGRAM PLL RFO 0911 0913 AF IC amp MOD TRANS 1324 DRAWN CHECKED CHECKED APPROVED SHEET SECTION7 SCHEMATIC R104 100 E 1 v R JAP PATH C217 Tee er 2 6203 em 163 FE M o 55 A 4 M KTC38805 Mon BOE 5 3 um 1 1009 E 3 PER ES el c KRCH2S 150P E 5 3 3 sexo s SPEAKER KRCIOIS K Eri Bt BAND 5045 m R233 0233 2 C2345 100 KSIB 102P T 2PIN 080 02181 2 KOStB4 SWO KTA15045 T 10 16 Rer ime ce we ims IW 6 IU 188 FEX m 0162 KTC38808 As 163 28087 x301 coo TEST POT 1 8
6. 11 DONGXIANG MAN 9 C333 C913 C921 C931 142 ELECT CAPACITOR 100UF KR3 16V101MA 5X11 DONGXIANG MAN 2 C821 C923 143 ELECT CAPACITOR 1000UF KR1 16V102MF 10X20 DONGXIANG MAN 4 C207 C213 C217 C912 144 ELECT CAPACITOR 0 22UF KR1 16VR22MA 5X11 DONGXIANG MAN 1 C124 145 ELECT CAPACITOR 2 2UF KR1 16V2R2MA 5X11 DONGXIANG MAN 1 C741 146 ELECT CAPACITOR 22UF KR1 16V220MA 5X11 DONGXIANG MAN 0 147 ELECT CAPACITOR 220UF KR1 16V221MB 6 3X20 DONGXIANG MAN 2 C953 C954 148 ELECT CAPACITOR 4 7UF KR1 16V4R7MA 5X11 DONGXIANG MAN 2 C411 C960 149 ELECT CAPACITOR 47UF KR1 16V470MA 5X11 DONGXIANG MAN 5 C143 C185 C206 C233 C933 150 CHIP CERAMIC 100PF 1608 PHILIPS SAMSUNG SMD 1 C735 151 DIP TRIMMER 20PF KCVN620 FOKITS MAN 1 CT301 NAME amp DESCRIPTION TRANSFORMER VENDOE CODE CHOKE T1 VENDOR Location NO T901 REMARKS TRANSFORMER EI 24 MOD T2 T201 IFT COIL RF FREE TX 27MHz TX1 L701 L702 COIL AXIAL 0 47uH LALO3TROR47K L703 L302 IFT COIL 27MHz B RX1 L101 IFT COIL 27MHz RX 7RC RX2 L107 IFT 10 7MHz RX B RX3 L108 IFT COIL DETECTOR 455KHz RX4 L109 IFT 455KHz B RX5 L112 IFT COIL 16 5MHz VCO VCO1 lt lt gt gt gt gt gt 9 gt gt 1301 COIL AXIAL 1 5UH LALO3TR1R5K L102 L106 COIL AXIAL
7. 30 27 305 3322 16 61 5461 13 6525 31 27 315 3324 16 62 5463 13 6575 32 27 325 3326 16 63 5465 13 6625 33 27 335 3328 16 64 5467 13 6675 34 27 345 3330 16 65 5469 13 6725 35 27 355 3332 16 66 5471 13 6775 36 27 365 3334 16 67 5473 13 6825 37 27 375 3336 16 68 5475 13 6875 38 27 385 3338 16 69 5477 13 6925 39 27 395 3340 16 70 5479 13 6975 40 27 405 3342 16 71 5481 13 7025 2007 02 23 TCB 660 Circuit Description Page 10 4 3 Descriptions of Each Block 4 3 1 Introduction The synthesizer is implemented with the following components PLL IC IC301 X TAL X301 VCO VARICAP DIODE D301 IC1301 is CMOS LSI that includes most of PLL block The 0301 1301 C311 C312 C313 C314 varicap diode D301 are clap oscillator circuit to operate as a VCO of the IC301 Q305 is a switching transistor to connect or disconnect the tuning capacitor in the VCO oscillator tank circuit for transmitter or receiver 0302 works as a buffer amplifier for RX local freguencies 16MHz and TX carrier generating freguencies 13MHz 4 3 2 Reference Frequency The crystal X301 4 5MHz and other components at Pin 1 and 24 of IC301 can make a reference frequency oscillator with internal amplifier 4 3 3 0301 and surrounding parts are consisting a clap oscillator works as of IC301 With appropriate control voltage on D301 the VCO can be oscillate over the required range of 13 4825MHz to 16 7 10MHz 4 3 4 Programmable Divider and Its
8. 23 KEC SMD 9 Q742 0921 0923 0931 0101 0161 0162 0301 Q302 118 CHIP TRANSISTOR KTC3880S SOT 23 KEC SMD 8 Q303 Q701 Q702 119 DIODE ZENER Z02W5 1V SOT 23 KEC SMD 1 DZ181 120 DIODE ZENER ZO2WA 3V SOT 23 KEC SMD 1 DZ931 121 DIODE ZENER Z02W8 2V SOT 23 KEC SMD 1 DZ921 122 DIODE SI CHIP KDS181 SOT 23 KEC SMD 1 D401 D102 D103 D105 D171 D180 123 DIODE SI CHIP KDS184 SOT 23 KEC SMD 10 D233 D741 D742 D921 D961 124 DIODE SI CHIP KDS226 SOT 23 KEC SMD 1 D101 125 DIODE VARICAP KDV251S SOT 23 KEC SMD 2 D301 D302 126 IC PLL LC7152NM SANYO YANG WON SMD 1 IC301 127 IC OP AMP KIA358F KEC SMD 1 IC102 128 IC OP AMP KIA4558F KEC SMD 1 401 129 C FM IF TK14489V TOKO SMD 1 IC101 MAIN PCB MANUAL ASS Y 130 FILM RESISTOR 2 2 1 2W 5 ST MINI MAN 1 R712 131 FILM RESISTOR 10 1 2W 5 ST MINI MAN 1 R921 132 FILM RESISTOR 470 1 2W 5 ST MINI MAN 2 R953 R954 133 FILM RESISTOR 1K 1W 5 ST MINI MAN 2 R951 R952 134 RESISTOR 10K 1 16W 5 T 1608 PHILIPS SMD 1 R713 135 METAL OXID RESISTOR 10 2W 5 ST BULK MAN 1 R208 136 RESISTOR SEMI 47KB PHO630NOX0X HA1 BASOUNDWELL MAN 1 RV131 137 RESISTOR SEMI 2 2KB PHO630NOX0X HA1 BZSOUNDWELL MAN 1 RV231 138 RESISTOR SEMI 22KB PH0630NOXOX HA1 B2 SOUNDWELL MAN 1 RV401 139 RESISTOR SEMI 4 7KB PHO630NOX0X HA1 BASOUNDWELL MAN 1 RV911 140 ELECT CAPACITOR 1UF KR1 16V010MA 5 11 DONGXIANG MAN 3 C167 C407 C408 C208 C210 C232 C331 C332 141 ELECT CAPACITOR 10UF KR1 16V100MA 5
9. 46 RESISTOR 1K 1 16W 5 T 1608 PHILIPS SMD 17 R410 R501 R931 R955 R956 R957 R958 R157 R161 R185 R315 R321 R322 R323 R324 R325 R326 5 47 RESISTOR 10 1 16W 5 1608 PHILIPS SMD 17 R327 R412 R413 R414 R703 R821 R823 R140 R141 R159 R186 R188 j i 48 RESISTOR 100 1 16W 5 1608 5 SMD 9 R202 R233 R309 R311 49 RESISTOR 2 1 16W 5 1608 5 SMD 1 R405 50 RESISTOR 150 1 16W 5 T 1608 PHILIPS SMD 1 R706 51 CHIP RESISTOR 1 5K 1 16W 5 T 1608 PHILIPS SMD 2 R742 R924 52 CHIP RESISTOR 15K 1 16W 5 T 1608 PHILIPS SMD 3 R155 R166 R235 53 CHIP RESISTOR 150K 1 16W 5 T 1608 PHILIPS SMD 1 R701 54 CHIP RESISTOR 2 2 1 16W 5 T 1608 PHILIPS SMD 1 R204 55 CHIP RESISTOR 220 1 16W 5 T 1608 PHILIPS SMD 3 R169 R702 R914 NAME amp DESCRIPTION VENDOE CODE VENDOR Location NO REMARKS R131 R203 R237 R307 R402 56 CHIP RESISTOR 2 2K 1 16W 5 T 1608 PHILIPS SMD 12 R817 R822 R912 R922 R923 R961 R01 57 RESISTOR 22K 1 16W 5 T 1608 PHILIPS SMD 6 R162 R19 58 CHIP RESISTOR 220K 1 16W 5 T 1608 PHILIPS SMD 2 R171 R177 59 CHIP RESISTOR 2 2M 1 16W 5 T 1608 SMD 1 R153 60 CHIP RESISTOR 2 7K 1 16W 5 T 1608 PHILIPS SMD 2 R167 R915 61 CHIP RESISTOR 27K 1 16W 5 T 1608 PHILIPS SMD 2 R102 R403 62 CHIP RESISTOR 3 3K
10. C932 C122 C132 C134 C135 C137 C138 C168 C169 C180 C186 81 CHIP CERAMIC 0 1UF 1608 PHILIPS SAMSUNG SMD 18 C236 C308 C322 C325 C401 C402 C405 C413 82 CHIP CERAMIC 1UF 1608 PHILIPS SAMSUNG SMD 2 C159 C961 83 CHIP CERAMIC 0 022UF 1608 PHILIPS SAMSUNG SMD 5 C166 C203 C214 C238 C403 NAME amp DESCRIPTION VENDOE CODE VENDOR Location NO REMARKS 84 CHIP CERAMIC 0 047UF 1608 PHILIPS SAMSUNG SMD 7 C721 914 84 CHIP CERAMIC 0 47UF 1608 PHILIPS SAMSUNG SMD 1 C212 85 CHIP CERAMIC 0 068UF 1608 PHILIPS SAMSUNG SMD 1 C410 86 CHIP CERAMIC 10PF 1608 PHILIPS SAMSUNG SMD 3 C96 C113 C324 87 CHIP CERAMIC 100PF 1608 PHILIPS SAMSUNG SMD 7 C101 C109 ES SEM C731 C733 88 CHIP CERAMIC 150PF 1608 PHILIPS SAMSUNG SMD 6 C102 C104 C106 C131 C311 C722 89 CHIP CERAMIC 16PF 1608 PHILIPS SAMSUNG SMD 1 C316 90 CHIP CERAMIC 18PF 1608 PHILIPS SAMSUNG SMD 4 C98 C99 C112 C119 91 CERAMIC 180PF 1608 PHILIPS SAMSUNG SMD 1 C734 92 CHIP CERAMIC 22PF 1608 PHILIPS SAMSUNG SMD 1 C312 93 CHIP CERAMIC 220PF 1608 PHILIPS SAMSUNG SMD 4 C329 C714 C717 C724 94 CERAMIC 3PF 1608 PHILIPS SAMSUNG SMD 1 C319 95 CHIP CERAMIC 30PF 1608 PHILIPS SAMSUNG SMD 1 C315 96 CHIP CERAMIC 33PF 1608 PHILIPS SAMSUNG SMD 4 C108 C302 C318 C707 97 CERAMIC 330PF 1608 PHILIPS SAMSUNG SMD 5 C715 C723 C725
11. Channel amp Frequency generator set to 1 KHz to the 2 0KHz 19CH 27 185MHz microphone Transmit Connect the modulation meter Function FM Mode through the RF attenuator to CB ANL Off DX the ANT Connector Adjust Volume Optional the audio signal level to obtain Sguelch Optional by 1KHz deviation RF Gain Optional When you increase the audio MIC Gain Max signal by 20 dB the deviation should not exceed 2 0KHz deviation Figure 3 Frequency Counter Figure2 RF Power ANT Connector Meter upply Modulation Meter Figure 3 Audio Generator TTI 2007 02 23 TCB 660 Circuit Description Page 17 5 3 Receiver Section 5 3 1 Test Equipment Required Standard Signal Generator SSG DC power supply 13 8V 3A AC Level Meter Distortion Meter Oscilloscope SINAD Meter 8 ohm Dummy Load 5 3 2 Alignment Procedure Step Setting Connection Adjuster Adjust for 1 AM Audio Output Adj Connect RF Signal Generator L101 Maximum Channel amp Frequency to EXT ANT Connector L103 indication on 19CH 27 185MHz Connect AC Level Meter and L104 AC Level MIC Receive Distortion Meter and SINAD L105 Meter Reduce Function AM Mode Meter across EXT SPK jack L107 output from CB ANL Off DX with 8 ohm Dummy L108 SSG until the Volume Full clockwise Load Figure 4 L112 audio output Squelch Turn to counter becomes about clockwise 2V RF Gain
12. Connection Adjuster Adjust for 1 RF Power Adj Connect dummy load and RF Maximum Channel 19CH Power Meter to the EXT ANT L701 indication on Function AM or FM Mode connector on the set Figure 3 L702 the Power CB ANL Off DX L703 Meter 4 0W Transmit If indication is Volume Optional not in 4W Squelch Optional range ACP RF Gain Optional Adjustment R MIC Gain Minimum V911 2 Freguency Adj Connect dummy load and CT302 Be sure that Channel amp Frequency Frequency Counter through the indication 19CH 26 956 MHz Coupler to RF Power Meter of the Function AM or FM Mode Connect RF Power Meter to transmitter CB ANL Off DX EXT ANT connector on the frequency is Mic Transmit No Mod set Figure 2 27 185MHz Volume Optional 300 Hz on Squelch Optional the Frequency RF Gain Optional Counter MIC Gain Optional 3 AM Modulation Adj Connection the audio RV231 85 95 Channel amp Frequency generator set to 1 KHz to the 19CH 27 185MHz microphone MIC Transmit Connect the modulation meter Function AM Mode through the RF attenuator to CB ANL Off DX the ANT Connector Adjust Volume Optional the audio signal level to obtain Squelch Optional by 50 modulation RF Gain Optional When you increase the audio MIC Gain Max signal by 20 dB the modulation should not exceed 95 Modulation Figure 3 TTI 2007 02 23 TCB 660 Circuit Description Page 16 4 FM Deviation Adj Connection the audio RV401 1 8KHz
13. Full clockwise 2 FM Audio Output Connect RF Signal Generator 1 109 Maximum Channel amp Frequency to EXT ANT Connector indication on 19CH 27 185MHz Connect AC Level Meter and AC Level MIC Receive Distortion Meter and SINAD Meter Reduce Function FM Mode Meter across EXT SPK jack output from CB ANL Off DX with 8 ohm Dummy SSG until the Volume Full clockwise Load Figure 4 audio output Sguelch Turn to counter becomes about clockwise 2V RF Gain Full clockwise 3 Squelch Adj Connect RF Signal Generator 131 Adjust until Channel amp Frequency to EXT ANT Connector the audio 19CH 27 185MHz Connect AC Level Meter and output MIC Receive Distortion Meter and SINAD appears Function FM Mode Meter across EXT SPK jack CB ANL Off DX with 8 ohm Dummy SSG 27 185MHz Load Figure 5 100uV 1 5KHz Dev Volume Full clockwise Squelch Full clockwise clockwise RF Gain Full clockwise TTI 2007 02 23 TCB 660 Circuit Description Page 18 DC Power Supply AC Level Meter Distortion Meter SINAD Meter 8 Ohm Dummy Load SSG TTI 2007 02 23 SECTION3 PART LIST PART LIST of TCB 660 Rev 05 NAME amp DESCRIPTION ELECT Parts VENDOE CODE VENDOR Location NO 09 Feb 07 REMARKS COVER ASS Y 1 SPEAKER 66mm 66AR000 8P 4K11 ASAHI ASAHI MAN 1 SPK
14. POLYESTER 0 11 SAME AS TCB770 Bonso For diffuser 21 RING NUT BsBm SAME AS TCB770 Bonso For channel Rf on off 22 DOUBLE SIDE TAPE FOR DIFFUSER 29 3 5 0 2T MAIN BODY ASS Y SAME AS TCB770 Bonso NO gt po amp gt 22 12 gt For diffuser 23 MAIN BODY 1 0 SAME AS TCB770 DESHAN 24 CORD STOPPER PP BLACK SAME AS TCB770 Yisheng Wire stopper 25 SCREW MACH M3 10L Black BH SAME AS TCB770 Bonso TR mounting 26 SCREW Mach 3 8L TAPTITE Black BH SAME AS TCB770 SAME AS ITEM 6 Bonso Main PCB Main body mounting 27 M3 SS41 SAME AS TCB770 Bonso TR mounting 28 SPRING WASHER SAME AS TCB770 Bonso TR mounting 29 BUSH NLLON66 GRASS 15 SAME AS TCB770 Yisheng For TR 30 ANT TERMINAL SPTE 0 2t SAME AS TCB770 DESHAN For Antenna 31 MICA 0 6t SAME AS TCB770 Bonso For TR 32 TX SHIELD 1 SPTE 0 3t SAME AS TCB770 DESHAN For Main PCB location lower 33 TX SHIELD CAN 2 SPTE 0 3t SAME AS TCB770 DESHAN For Main PCB location upper 34 VCO SHIELD SPTE 0 31 SAME AS TCB770 DESHAN For Vco 35 CAP RUBBER 8 NBR BLACK MICROPHONE ASSEMBLY NEW TTI WW mea lt ELECTRIC gt 1 EPBO MIC880 00 0
15. a time constant determined R174 and C176 Therefore any sharp negative going pulse from D161 will back bias Q164 and clipped The way to recover the AM information audio is envelope detector TTI 2007 02 23 TCB 660 Circuit Description Page 14 5 Test Equipment Setup and Alignment Instructions 5 1 General Section 5 1 1 Test Equipment Required DC power supply 13 8V 3A DC Voltmeter or Oscilloscope attenuator 30dB 5 1 2 Alignment Procedure Step Setting Connection Adjuster Adjust for 1 RX VCO voltage DC voltmeter to VCO L301 1 5 2 0 V DC Channel amp Frequency Test point Figure 1 1CH 26 956 MHz Mic Receive Volume Optional Sguelch Optional RF Gain Optional Mic Gain Optional 2 TX VCO voltage Adj DC voltmeter to VCO L301 1 5 2 0 V DC Channel amp Frequency Test point Figure 1 1CH 26 956 MHz Mic Transmit No Mod Volume Optional Sguelch Optional RF Gain Optional Mic Gain Optional DC Voltmeter Oscilloscope VCO TP Figure 1 TTI 2007 02 23 TCB 660 Circuit Description Page 15 5 2 Transmitter Section 5 2 1 Test Equipment Required RF Power Meter DC power supply 13 8V 3A 50 ohms load non inductive Spectrum analyzer RF attenuator 30dB Frequency counter Oscilloscope Coupler Audio generator Modulation meter 5 2 2 Alignment Procedure Step Setting
16. is dual conversion super heterodyne type with the first IF 10 695MHz and the second IF 455KHz Receiver is separated to blocks 1 st IF section and 2 nd IF section The PLL synthesizer supplies 1 st local frequency 16 270MHz 16 710MHz The amplified 27MHz is mixed With the provide 1 st local frequencies Q102 Q103 mixes the incoming RF signal to generate 1 st IF signal The resulting first IF is 10 695MHz 0102 0103 is the first converter and 10 69SMHz is sharply filtered by L108 and crystal filter CF101 The first IF is again mixed with a second local oscillator of 10 24MHz With the 10 240MHz signal IC101 FM IF IC converts the incoming signals to generate 2 nd IF signal and recovered audio signals 2 nd IF is filtered by a razor sharp ceramic filter CF101 coupled The 455KHz signal from the 2 nd IF filter was amplified and limits internally After amplification the signals fed to the quardrature detector loop L109 Then could see the recovered signals Pin 11 of IC101 With the amplitude of recovered signals Q151 serves as an amplifier AM signals from the Pin 6 of IC101 were tapped with C161 and amplified two stage amplifier 0161 0162 Q161 is a first 455KHz amplifier and the Q161 being the last amplifier D161 15 a detector diode witch produce audio signal as well as negative DC voltage for AGC action The negative voltage also provides forward biasing to the emitter of ANL clipping transistor Q164 The biasing voltage has
17. 0 000 1 2 Film Resistor 10K 1 8W 5 10K 1 3 Capacitor 103P 10 0603 103P 1 4 Sw Push SKPS 2210C 1 5 Sw Tact SKTS 1102A 3 6 Condensor 4 5V 2 2K 44db 2db PFO 9765P LP 1 7 Code 5CORD 1SIELD FINE FINE 1 8 Connector 56 16 6P HYESUNG 1 9 LEAD WIRE BLK 3 3 65m AWG28 1571 2 10 LEAD WIRE RED 3 3 65m AWG28 1571 2 NAME amp DESCRIPTION VENDOE CODE VENDOR Location NO REMARKS lt MECHANICAL gt BOTTOM COVER ABS BLACK PBOT130000 003 YiSheng UPPER COVER ABS BLACK PTOP130000 003 YiSheng DECO ABS SILVER PDEC130000 003 YiSheng PUSH LEVER ABS BLACK PPUL130000 003 YiSheng KNOB ABS BLACK PKNB130000 003 YiSheng HOLDER PC BLACK PHOL130000 003 YiSheng SPKHOLDER RUBBER BLACK AHOS880770 003 Longshenda 611 BON MIC BUSHING RUBBER BLACK AMIB880770 003 Longshenda CUSHION 20 24 8 0t One side double tape EVA sponge BONSO MIC SPONGE 30 7 3t No tape EVA sponge Black BONSO SHRINKAGE TUBE D3x50mm BLACK BONSO SCREW TAP 2 6 161 25 Black PH BONSO SCREW TAP 2 6 101 25 Black BH BONSO Logo label PE 34 6 6 6 0 3T BONSO Name label PE 22 12 0 2T BONSO lt lt lt lt pis 2 2 2 0 lt PACKING gt 1 POLYBAG 100 900 0 05T ACCESSORY BRACKET SET DESH
18. 0uF 16V A TYPE SMD 1 C811 27 CHIP TRANSISTOR KRA101S SOT 23 KEC SMD 1 Q803 28 CHIP TRANSISTOR KRC101S SOT 23 KEC SMD 1 Q802 29 CHIP TRANSISTOR 1045 5 23 SMD 1 Q801 30 LED BACK LIGHT CHIP LED AOT 0603P B01 V BLUEWIZ SMD 7 D951 Linge D399 D354 D956 D965 D966 NAME amp DESCRIPTION VENDOE CODE VENDOR Location NO REMARKS 31 EEPROM AT24C02 SOP 8 ATMEL SMD 1 802 32 CPU FLASH WITH TCB660 SOFTWARE JT5BL9 TOSHIBA TTI SMD 1 801 33 LCD DISPLAY SDM8A3926C FOR TCB 660 SANTECH MAN 1 LCD801 34 SW TACT TS 1109 HENGRONG MAN 5 SW801 SW802 SW806 SW808 35 RESONATOR 4 0MHz ZTA4 00MG D TRON D TRON MAN 1 X801 MAIN BODY ASS Y 36 CONNECTOR 56 239 HYESUNG MAN 1 J701 37 TRANSISTOR KTA1658 KEC MAN 1 Q911 38 TRANSISTOR 2SC2078 SANYO YANG WON MAN 1 Q704 39 TDA2003V ST MAN 1 201 011015820 40 POWER CORD RED BLACK 2PIN PLUG ASS Y PAN ASIA PAN ASIA MAN 1 J900 CABLE MAIN PCB AUTO ASS Y 41 MAIN FR 4 R 1 CAPITAL SMD 1 42 CHIP RESISTOR 0 1 16W 5 T 1608 PHILIPS SMD 2 R137 R201 43 CHIP RESISTOR 1 1 16W 5 T 1608 PHILIPS SMD 2 R711 R206 44 RESISTOR 10 1 16W 5 1608 PHILIPS SMD 2 R133 R301 45 CHIP RESISTOR 100 1 16W 5 T 1608 PHILIPS SMD 6 Se EIOS Eo 168 R314 R126 R164 R182 R187 R200 R222 R234 R238 R308 R312
19. 1 16W 5 T 1608 PHILIPS SMD 63 CHIP RESISTOR 33K 1 16W 5 T 1608 PHILIPS SMD 3 R172 R404 R407 64 RESISTOR 820K 1 16W 5 T 1608 PHILIPS SMD 1 R135 65 CHIP RESISTOR 390 1 16W 5 T 1608 PHILIPS SMD 1 R156 66 CHIP RESISTOR 39K 1 16W 5 T 1608 PHILIPS SMD 2 R163 R306 67 CHIP RESISTOR 47 1 16W 5 T 1608 PHILIPS SMD 3 R184 R705 R913 R101 R105 R106 R107 R108 68 CHIP RESISTOR 470 1 16W 5 T 1608 PHILIPS SMD 8 R165 R236 R709 69 CHIP RESISTOR 4 7K 1 16W 5 T 1608 PHILIPS SMD 5 R138 R205 R406 R704 R962 R122 R139 R174 R176 R300 70 RESISTOR 47K 1 16W 5 T 1608 PHILIPS SMD 9 R303 R409 R411 R415 71 RESISTOR 470K 1 16W 5 T 1608 PHILIPS SMD 2 R154 R178 72 RESISTOR 5 6K 1 16W 5 T 1608 PHILIPS SMD 1 R408 73 RESISTOR 56K 1 16W 5 T 1608 PHILIPS SMD 2 R103 R313 74 CHIP RESISTOR 6 8K 1 16W 5 T 1608 PHILIPS SMD 1 R152 75 CHIP RESISTOR 68K 1 16W 5 T 1608 PHILIPS SMD 1 R189 76 CHIP RESISTOR 82K 1 16W 5 T 1608 PHILIPS SMD 1 R173 77 THERMISTOR 100 OHM NCP18XF101J03RB MURATA SMD 1 TH131 78 THERMISTOR 10K OHM NCP18XH103J03RB MURATA SMD 1 TH101 79 CHIP CERAMIC 0 001UF 1608 PHILIPS SAMSUNG SMD 4 C181 C230 C239 C404 C111 C114 C115 C116 C117 C118 C153 C154 C155 C156 C157 C161 C162 C184 C201 C231 C234 C235 C323 C412 80 CHIP CERAMIC 0 01UF 1608 PHILIPS SAMSUNG SMD 37 C415 C501 C502 C503 C504 C506 C703 C704 C708 C713 C901 C902 C903 C911 C922 C924
20. 201 2 WIRE HARNESS PH 2PIN TO 11007 26 L 200mm FINE FINE MAN 1 J204 ESCUTCHEON ASS Y 3 PCB VOLUME 1LAYER CAPITAL MAN 1 4 A10K 091155 A10K L15KQ POLYSHINE MAN 1 VR101 5 B50K F 09115N 3B50K L15K POLYSHINE MAN 1 VR102 6 RESISTOR 1K 1 16W 5 T 1608 PHILIPS SMD 1 R400 7 COIL AXIAL 6 8UH LALO3TB6R8K MAN 4 L501 L502 L504 L506 8 WAFER 10PIN PH 10A 180C FINE FINE MAN 1 J101 9 WIRE HARNESS PH 10PIN 2 UL1007 26 L 50MM FINE MAN 1 J101 J102 10 WIRE HARNESS PH 6PIN TO OPE UL1007 26 L 70MM FINE FINE MAN 1 J502 11 SOCKET 56 16 6R HYESUNG MAN 1 J501 13 SINK TUBE diameter 4 mm x 15mm MAN 6 LCD PCB ASS Y 14 PCB LED 1 LAYER CAPITAL MAN 1 15 DISPLAY 4 1 CAPITAL MAN 1 16 RESISTOR 1K 1 16W 5 T 1608 PHILIPS SMD 1 R810 17 RESISTOR 10K 1 16W 5 T 1608 PHILIPS SMD 5 R1 R805 R806 R811 R814 18 CHIP RESISTOR 100K 1 16W 5 T 1608 PHILIPS SMD 4 R2 R3 R4 R804 19 RESISTOR 1 1 16W 5 1608 PHILIPS SMD 1 R803 R832 R833 R834 R835 R836 20 CHIP RESISTOR 2 2K 1 16W 5 T 1608 PHILIPS SMD 10 R8 R9 R10 R11 R12 21 CHIP RESISTOR 220K 1 16W 5 T 1608 PHILIPS SMD 1 R808 R812 R816 R831 R851 R852 22 CHIP RESISTOR 47K 1 16W 5 T 1608 PHILIPS SMD 8 R853 R854 R864 23 CHIP CERAMIC 0 01UF 1608 PHILIPS SMD 2 C806 C807 24 CHIP CERAMIC 1UF 1608 PHILIPS SMD 1 C805 25 CHIP CERAMIC 68PF 1608 PHILIPS SMD 2 C801 C802 26 CHIP TANTAL 1
21. 326 20 10K R305 R3097 K 2K TSOP 100K k 36328 C324 I e Kiss Le NA 0302 C C315 63 KTC3880S 23 30 22 I om 3 239 A SW 1229 M am k 4 m R 12 1302 Md 9 4 OT Fr 047 i D742 R742 E J 29703 2329 2502346 220P 1 0742 2 3130302 R312 Ly 100P 566 2515 REG_B L82VI ik KTC3880S en ps 3 cras ler 1072910731 ans ders 5670 TU ur ane 2 les Ss pe 1 KREIS vco 0962 SHIELD 0502 909 R921 E DVE C406 826 FRONT PCB 8804 100K a r 5 PCB to MAIN PCB E v Taso R405 2M to PCB SOLDERING 0921 2 KTCSB7SS C408 R412 KRCIO4S 1 16 10k 10k con Dd meos ase 1 Dao 1032 2 Ro m Fi Ron gt M AFN R406 Lee KIA4558F REG B C5 IVI ASK 566 547K OPT 10407 8 89 SW807 lt SQUELCH gt gt SW801 up 0912 KTAISO4S 31807 I 8 8
22. 4 5MHz is divided by 1800 times 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 9 10 of IC301 Passing the phase detector output closes the feedback loop through an active low pass filter and using the output to control the VCO freguency through varicap diode D301 Under locked conditions both of phase detector input signal must be identical at 2 5KHz The VCO frequency is then given by Receiver Fvco N 0 005 MHz OR Fvco 0 005 X N MHz Transmitter 0 0025 MHz OR Fvco 0 0025 X N MHz Since N is an integer the VCO frequency can be stepped up with in receiver mode 5KHz transmitter mode 2 5KHz increments By suitable choice of N the desired output frequency can be obtained Channel 1 Channel 40 Transmit 5393 13 4825 5481 13 7025 Receiver 3254 16 2700 3342 16 7100 See the Table 1 for other Channels The VCO frequency goes to the doublers circuit with doubles the incoming signals VCO Output Frequency Doublers Output Frequency TTI 2007 02 23 TCB 660 Circuit Description Page 8 Transmit CH 1 13 4825 MHz 26 965 MHz Transmit CH 40 13 7025 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 sample percentage accuracy Note that the ref
23. 965 21 27 215 2 26 975 22 27 225 3 26 985 23 27 235 4 27 005 24 27 245 5 27 015 25 27 255 6 27 025 26 27 265 7 27 035 27 27 275 8 27 055 28 27 285 9 27 065 29 27 295 10 27 075 30 27 305 11 27 085 31 27 315 12 27 105 32 27 325 13 27 115 33 27 335 14 27 125 34 27 345 15 27 135 35 27 355 16 27 155 36 27 365 17 27 165 37 27 375 18 27 175 38 27 385 19 27 185 39 27 395 20 27 205 40 27 405 2 4 Power Output AM 4 0 W FM 4 0 W 2 5 DC Iinput Voltage and Current with 13 2V DC Input to Power AMP Transmitter Power Amp Voltage 12 5 V Current 820 mA Transmitter Driver Amp Voltage 12 5 V Current 130 mA 2 6 Receiver IF and Local Oscillator Frequencies First IF 10 695 MHz Second IF 455 KHz First Local Oscillator 10 695 MHz Below Receiving Freguency Second Local Oscillation 10 240 MHz TTI 2007 02 23 TCB 660 Circuit Description Page 5 3 Semiconductors and Function 3 1 Transistor Ref No Description Manufacturer Function Q101 KTC3880S KEC RX Amplifier 0102 KTK211 KEC 1 st Mixer Q103 KTK211 KEC 1 st Mixer Q104 KRC101S KEC RX Bandl Switching 0105 015 RX Band2 Switching Q151 KTC3875S KEC RX FM AF Amplifier Q152 KRC112S KEC FM AF Mute at AM Mode 0153 015 AF Mute at Mode 0154 125 RX AF Mute at TX Mode Q161 KTC3880S KEC AM IF Amplifier 0162 KTC3880S KEC AM IF Amplifier Q163 KRA102S KEC RX AM B 0164
24. AN STUD BOLT ABS M6 8L BLACK same as TCB880 Yisheng BRACKET MIC 505304 1 04 same as 880 DESHAN PACKING RUBBER PACKING RUBBER same as TCB880 Union SCREW Mach M3 8L Taptite Black same as TCB880 Bonso SCREW _5x12L 1S ZN PLATING same as TCB880 Bonso WASHER S 3 NI PLATING B type same as TCB880 Bonso No 611 B ON gt STAR WASHER L M5 NI PLATING B type same as TCB880 Bonso ODM POWER CODE ASS Y UL1015 20 RED BLACK CABLE 2POS HOUSING TO TERMINAL CABLE PAN ASIA PAN ASIA OWNER S MANUAL SWIE 2 0 INNER BOX A SWIE 2 0T BROWN INNER BOX B SWIE 2 0T BROWN WARNING LABEL CODE 39 SERIAL NO STICKER NAME LABEL OUT BOX DWIE 7 0T SILICA GEL 19 ROHS STICKER OPP TAPE 50MM YELLOW STRAP 999 amp gt m m 60 0 lt 7 2 v lt 2 lt 2 0 PART NAME DESCRIPTION REMARK Upper cover SPC 0 75t Black Bottom cover SPC 0 75t Black Main body EGI 1 0t Bracket Set SPC 1 6t Blacke Key PCB 1 6t Main PCB 1 6t Ch knob ABS Black LED PCB 1 0t ON OO BR ON gt Nut for Mic connector Washe
25. C726 C729 98 CHIP CERAMIC 39PF 1608 PHILIPS SAMSUNG SMD 1 C705 99 CHIP CERAMIC 47PF 1608 PHILIPS SAMSUNG SMD 6 2 C103 107 01820928 100 CHIP CERAMIC 470PF 1608 PHILIPS SAMSUNG SMD 1 C718 101 CHIP CERAMIC 56PF 1608 PHILIPS SAMSUNG SMD 1 C130 102 CHIP CERAMIC 6PF 1608 PHILIPS SAMSUNG SMD 2 C317 C321 103 CHIP CERAMIC 68PF 1608 PHILIPS SAMSUNG SMD 1 C97 104 CERAMIC 680 1608 PHILIPS SAMSUNG SMD 1 C414 105 CHIP CERAMIC 82PF 1608 PHILIPS SAMSUNG SMD 5 C406 C720 C727 C732 C701 106 CHIP CERAMIC 8PF 1608 PHILIPS SAMSUNG SMD 1 C326 107 CHIP CERAMIC 9PF 1608 PHILIPS SAMSUNG SMD 1 C110 108 CHIP TANTAL 2 2uF 16V A TYPE SMD 1 C301 109 CHIP TRANSISTOR 2SK211 Y SOT 23 TOSHIBA SMD 2 A102 A103 110 CHIP TRANSISTOR KRA102S SOT 23 KEC SMD 1 Q163 Q104 Q105 Q153 Q305 Q311 111 CHIP TRANSISTOR KRC101S SOT 23 KEC SMD 9 0312 0313 0953 0954 112 TRANSISTOR KRC102S SOT 23 KEC SMD 1 0914 113 CHIP TRANSISTOR KRC110S SOT 23 KEC SMD 2 Q121 Q961 114 CHIP TRANSISTOR KRC111S SOT 23 KEC SMD 3 Q202 Q502 Q962 115 CHIP TRANSISTOR KRC112S SOT 23 KEC SMD 3 Q152 Q154 Q913 NAME amp DESCRIPTION VENDOE CODE VENDOR Location NO REMARKS 116 CHIP TRANSISTOR KTA1504S SOT 23 KEC SMD 4 Q164 Q233 Q912 Q924 A151 0181 0182 Q183 0234 117 CHIP TRANSISTOR KTC3875S SOT
26. C729 C731 L732 C732 C733 C734 L714 C735 serves as a spurious radiation suppressor This network also servers to match the impedance between TX power amplifier Q704 and the antenna C Circuits for Limiting Power After finished all alignment the constant voltage supply circuit limits the available power 4W or slightly less RV911 and corresponding three transistor control supply voltage of RF power amplifier When power low switch function Q914 changed the supply voltage Tune all the trimming parts for maximum indication of RF power meter and adjust RV571 to make 4W indication of RF power meter After finishing the above adjustments check the RF power meter reading is changed 1W under LOW state The turning is adjustment so that the actual power is from 3 8W to 4 0W There are no other additional controls for adjusting the TX output power D Modulation Control Modulation of the RF is a process that begins with the audio picked up by the microphone lt FM gt The microphone input is fed to mic audio amplifier IC401 that drives modulation vricap diode D302 in the VCO circuit RV401 limits the incoming modulation audio levels to inhibit over modulation While reading the modulation factor on the modulation analyzing eguipment adjustment RV401 shall not exceed 2 0KHz deviation lt AM gt Modulation signals are filtered with RC network and goes to the audio power amplifier IC201 in to make normal signal level to achieve wanted modula
27. Control The programmable input for each channel are stetted by the PLL Clock Pin 11 PLL Data Pin 12 PLL Enable Pin 13 of IC801 Each input signal to control the PLL ic is done with provide key input Pin 18 19 25 26 27 28 29 32 33 34 35 37 For each key input an internal code converts EEPROM appropriate control to the programmable divider for that channel Since the change transmit and receive and additional bit is required at Pin 8 of IC801 to allow the ROM to recognize the status TX or RX During transmit the push to talk switch makes Pin 8 ground with BRT Q802 PLL IC works under transmit status The programmable divider output fed to the phase detector for compare with the 2 5KHz reference frequency IC301 See table 1 for actual input and divide ratio on all channels 4 3 5 Phase Detector and VCO Control The phase detector is a digital phase comparator witch compares the phase of the reference signal with programmable divider output square waves and develops a series of pulses whose dc level depends on the phase error of each signal The phase detector pulse output is fed to an active low pass filter and RC low pass filter output signal of IC301 is filtered and fed to varicap D301 control the VCO frequency 4 3 6 Transmitter Receiver Buffer AMP Output signal of Q301 is fed into the buffer amplifier Q302 L302 to generate TX carrier frequency and 1 st local frequencies TTI 2007 02 23 TCB 660 Circuit Descriptio
28. IA358F KEC AGC Squelch Control IC201 TDA2003 ST AF Power Amplifier IC301 LC7152NM SANYO PLL IC401 KIA4558F KEC FM TX AF IC801 JTSBL9 TOSHIBA CPU IC802 24WC02 ATMEL EEPROM 3 3 Manufacture Information KEC KEC Co LTD SANYO SANYO Semiconductor Co LTD Inc TOSHIBA Toshiba Semiconductor Co LTD ATMEL ATMEL Co LTD TTI 2007 02 23 TCB 660 Circuit Description Page 7 4 Description of Frequency Determining and Stabilizing Circuit 4 1 Introduction The Frequencies for transmitter and receiver first local frequencies are all derived from a signal 4 5 crystal by means of a phase locked loop PLL The first local oscillator frequencies are 16 270MHz CH1 to 16 710MHz CH40 The second local frequency is fixed at 10 240MHz to generate second IF 455KHz Transmit the VCO of the PLL operates 13 4825MHz CH1 to 13 7025MHz 40CH The VCO frequency goes to the doublers circuit Q701 L701 L702 with doubles the frequency to generate 26 965MHz CH1 to 27 405MHz 40CH Q701 Doublers To transmitter 13 4825MHz CHI 26 965MHz CH1 _ _ 13 7025MHz CH40 27 405MHz CH40 The VCO operating frequency for the receiver is 16 27MHz CH1 to 16 710MHz CH40 as the first local oscillator injected through the buffer amplifier Q302 into the first FET balanced mixer Q102 0103 4 2 Basic Synthesis Scheme The crystal frequency
29. erence frequency of 5KHz receiver and 2 5KHz transmitter is obtained by dividing the 4 5MHz by 900 times and 1800 times See Table 1 for transmitter receiver mode VCO frequencies TTI 2007 02 23 TCB 660 Circuit Description Program Data amp Freguency Table 1 Page 9 TTI Channel bes y 1 26 965 3254 16 27 5393 13 4825 2 26 975 3256 16 28 5395 13 4875 3 26 985 3258 16 29 5397 13 4925 4 27 005 3262 16 31 5401 13 5025 5 27 015 3264 16 32 5403 13 5075 6 27 025 3266 16 33 5405 13 5125 7 27 035 3268 16 34 5407 13 5175 8 27 055 3272 16 36 5411 13 5275 9 27 065 3274 16 37 5413 13 5325 10 27 075 3276 16 38 5415 13 5375 11 27 085 3278 16 39 5417 13 5425 12 27 105 3282 16 41 5421 13 5525 13 27 115 3284 16 42 5423 13 5575 14 27 125 3286 16 43 5425 13 5625 15 27 135 3288 16 44 5427 13 5675 16 27 155 3292 16 46 5431 13 5775 17 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 6425 29 27 295 3320 16 60 5459 13 6475
30. ions indication Freguency Range 26 965 to 27 405 MHz Freguency Response 300 to 2 500 Hz Power Source 13 2 V DC Audio Output Load 8 OHM Audio Output 4 0 W or More Squelch Adjustable from 0 2 uV to 100 uV Sensitivity 20dB SINAD under 1 0 uV RF Signal or less 10 dB S N under 1 0 uV RF Signal or less Intermediate Freguency IstIF 10 695 MHz 2ndIF 455 KHz Transmitter Carrier Power Conducted AM 4 W FM 4 W Current Drain 13 2 V Supply Voltage No Modulation 1 100 mA Max Modulation 1 600 mA Modulation Capabilities 90 FM 1 8 KHz Dev Spurious Radiation Less then 74 dBc Antenna Impedance 50 OHM Frequency Tolerance 0 002 2007 02 23 TCB 660 Circuit Description Page 3 2 1 Technical Description General Model TCB 660 is an mobile type AM FM radio transceiver for use of the Citizen Radio Service Front Panel Controls LCD Channel and RX TX Receiver Audio Control With Power ON OFF Control Volume Squelch Control Volume Channel UP Down Key Switch AM FM Select Key Scan Key 6 9 amp Accessorily Connectors Antenna Socket External Speaker Jack Microphone Condenser Microphone of emission FM F3E TTI 2007 02 23 TCB 660 Circuit Description Page 4 2 3 Frequency Table 1 26
31. ker 4 FELT SPK 65 0 3t BLACK SAME AS TCB770 Bonso 1 For speaker 5 FELT COVER 8 133 0 3t BLACK SAME AS TCB770 Bonso 4 For bottom cover amp upper coveradhesive location side NAME amp DESCRIPTION SCREW Mach M3 8L TAPTITE BLACK VENDOE CODE SAME AS TCB770 VENDOR Location NO Bracket spk mounting REMARKS SCREW Mach M3 8L TAPTITE BLACK SAME AS TCB770 SAME AS ITEM 6 mann UUUy DUUUTIT Uppe vUUVCTI hl CUSHION 20 24 4 0t EVA SPONGE BLAC ESCUTCHEON ASS Y SAME AS TCB770 For upper cover adhesive location center 9 ESCUTCHEON ABS BLACK NEW Bonso Front case plastic 10 CHKNOB ABS BLACK same as TCB880 Vol knob Bonso For Channel 11 KEY PAD SILICONE CLEAR PU coating NEW Union 12 LCD BRACKET SPTE 0 3t SAME AS TCB770 DESHAN For diffuser 13 DIFFUSER LENS ACRYL CLEAR SAME AS TCB770 Bonso Diffuser 14 REFLECTOR ACRYL CLEAR SAME AS TCB770 Bonso For diffuser 15 ZEBRA SILICONE SAME AS TCB770 Bonso For diffuser 16 WINDOW ACRYL CLEAR SAME AS TCB770 Bonso 17 SCREW MACH M2 6 5L Black FH SAME AS TCB770 Bonso Esc Main body mounting 18 SCREW TAP 2 6 81 25 Ni plating BH SAME AS TCB770 Bonso Key PCB mounting 19 DOUBLE TAPE WINDOW 0 16t SAME AS TCB770 Bonso For window 20 WHITE SHEET
32. n Page 11 4 3 7 Transmitter Doublers The output signal of 0302 L302 goes to an amplifier with tuning circuit 0701 L701 L702 which doubles incoming 13MHz signals 4 3 8 Switching of Turning Capacitor in VCO The VCO circuit must tune with a wide range of frequencies 13 4825MHz 13 7025MHz for transmitter and 16 27MHz 16 71MHz for receiver To comply above range of VCO the tuning capacitance should switch for transmission The tuning circuit consists with L301 C311 C312 C313 and C314 When the VCO is working as a receiver Q305 becomes turn OFF So L301 and C311 D301 makes turning function When transmitting Q305 becomes ON S the 0 L301 an parallel capacitance of C316 and C311 make turning function 4 3 9 Receiver Local Oscillator Outputs FIRST MIXER The secondary output signal of L107 is injected to the sources of 1 st mixer Q102 Q103 in the 1 st IF mixer section SECOND MIXER The output of 10 24MHz oscillator circuit with X101 is injected into the IF IC IC101 internally Incoming IF signal and 10 24MHz signal are mixed inside the IF IC to extract 2 nd IF signal 455KHz FM audio Signals are recovered with the way of quadrature detector AM signals are recovered with envelope detector 4 4 Frequency Stability Let Fo Crystal oscillator frequency Fr Phase detector reference frequency Fvco VCO frequency Ft Transmit frequency Then Receiver Fr Fo 900 Transmitter Fr 2 Fo 1800 And u
33. nder locked conditions Fr 7 07 Where N is the programmable divider divide ratio Then Fvco N X Fr From which it can be seen the percentage error in Ft is the same as the percentage error in Fo The stability of the crystal oscillator is determined primarily by the crystal itself and having lesser deviation by the active and passive components of the oscillator The choice of crystal and components is such that the required frequency stability is maintained over the required voltage and temperature range TTI 2007 02 23 TCB 660 Circuit Description Page 12 4 5 Description of other Circuits 4 5 1 Transmitter A RF Amplification RF carrier frequencies are obtained at the output of doublers amplifier Q701 and turning IFT coil L701 L702 The input of VCO freguencies 13MHz is selected at the doublers output which creates the necessary 27MHz The output of doublers amplifier Q701 is fed through turning IFT coil L701 L702 to the base of pre driver amplifier 0702 It s output 27MHz is coupled to RF driver amplifier 0703 a low level class C power amplifier Driver Q703 supplies the necessary power gain to operate RF final Q704 at the maximum efficient The output of 0704 is supplied to the antenna through L C turning circuit B Circuit for Suppression of Spurious Radiation The turning circuit between the output of final amplifier 0704 and antenna 4 stage network C722 C723 C724 L711 C725 C726 L712
34. r for Mic connector Escutcheon ABS Black Double tape Window 0 16t Window Acryl Key pad Silicone PU coating LCD Bracket SPTE 0 3t LCD Diffuser Lens Acryl Reflector Acryl Zebra Silicone Stud bolt ABS BsBm Packing rubber NBR Ant terminal SPTC 0 2t Felt Cover 0 3t Cushion EVA sponge TX shield can 2 SPTE 0 31 Shield cover SPTE 0 31 Speaker Bracket Spk EGI 1 0t Felt Spk Dia 65 x 0 3t Mic connector Cu tape 1 Cu 49x9x0 1t Cu tape 2 Cu 77x15x0 1t TX shield can 1 SPTE 0 3t VCO shield can SPTE 0 31 White sheet PE 0 1t S W PCB 1 6t Cord stopper PVC Washer for Ant connector Nut for Ant connector Bush Nylon66xGrass15 TR Ant connector Screw Mach M2 6x5L FH DBA ND A A A A A Oe A A A A NN A gt gt A eS E EN EO For Escutcheon Screw Mach M3x8L Taptite BH A For speaker bracket Main PCB Cover Screw Mach M3x10 BH For TR Nut M3 For TR Spring washer M3 For TR Screw Tap 2 6x8L BH For Key PCB Mica 0 4t ANO 62 CO IM me o 9 ds ON lt ej M m 3 4 5 Lu v 9 LO Main PCB Top Silk L707 171 R712 L706 CO L704 1101
35. rovolt Specification is subject to change without prior notice ivi Dual conversion superheterodyne Double Conversion 1st 10 695MHz 2nd 455KHz itivi 0 7uV for 10dB S N N in AM Mode E C E V E SECTION2 CIRCUIT DESCRIPTION Contents 1 General 1 1 Receiver 1 2 Transmitter 2 Technical Description 2 1 General 2 2 Type of emission 2 3 Frequency Table 2 4 RF Power Output 2 5 DC input Voltage and Current with 13 2V DC Input to Power AMP 2 6 Receiver IF and Local Oscillator Frequencies 3 Semiconductors and Function 4 Description of Frequency Determining and Stabilizing Circuit 4 1 Introduction 4 2 Basic Synthesis Scheme 4 3 Descriptions of Each Block 4 3 1 Introduction 4 3 2 Reference Frequency 4 3 3 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 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 Test Equipment Setup and Alignment Instructions 5 1 General Section 5 2 Transmitter Section 5 3 Receiver Section 2007 02 23 TCB 660 Circuit Description Page 2 1 1 1 1 2 TTI e A General Receiver Display 40 Channels and other funct
36. tion IC201 drives T201 which is a combination AF output modulation transformer During transmit one of the secondary windings of T201 is tied between the 13 2V DC supply and collectors of RF driver Q703 and RF power amplifier 0704 As the audio passes through T201 it causes the collector supplies of Q703 and Q704 to vary with audio producing an AM signal at carrier freguency To avoid over modulation of the carrier a protection of the modulating signal is fed back from the 1201 through the AMC circuit 0233 and 0234 to control the gain of IC201 and sets the maximum level of modulation Form the center tab of RV231 and 0233 the feedback signal is rectified by diode 0233 filtered by C233 and supplied the 0234 The collector of 0234 is tied directly TX audio input to control gain That is when the audio output is higher that the preset level of RV231 the information is reflected through 0233 and Q234 reducing the gain of IC201 TTI 2007 02 23 TCB 660 Circuit Description Page 13 4 5 2 Receiver Overload protection is provided to receiver s semiconductors by diode D101 These diodes have a little effect on the incoming signal from another CB station they protect the receiver from stray transmitter energy In the receiver mode of operation Q923 transistor is turned on Also bias voltage is applied to 0101 0102 0103 Q106 Q101 is a 27MHz RF input amplifier and any excessive input signal is limited by diode D101 CB receiver
37. tti SERVICE MANUAL MULTI CHANNEL AM FM TRANSCEIVER TCB 660 TTI Tech Co Ltd 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 PART LIST SECTION 4 MECHANICAL DISASSEMBLY SECTION 5 BOARD LAYOUT 5 1 MAIN PCB 5 2 FRONT PCB 5 3 VOLUME PCB SECTION 6 BLOCK DIAGRAM SECTION 7 SCHEMATIC SECTION1 SPECIFICATIONS Channel 40 See the frequency band chart 126 96 MHz 27 99125 MHz G F3E FM N Frequency Tolerance 10 002 A PLL Synthersizer E Operating Temperature Range 10 to 55 R Microphone Plug in Type 113 2V 15 140 W x 186 L x 37 990 g Antenna Connector Antenna Connector Output Duty cycle 10 4 Watts 13 2V DC A N S FM 1 8KHz 0 2KHz M Frequency Response 300Hz to 3000Hz T Output Impedance 50 Unbalanced Suppression than 36dBm L R Modulation AM from 85 to 95 E R Current Drain Full Mod 1 6A Max 10 5uV for 2008 SINAD in FM Mode Audio Output Power 2 0W 8 Ohm Audio Distortion Less then 8 1KHz Image Rejection 60 dB Adjacent Channel Rejection 60 dB Conducted Spurious More than 60 dB 300 to 2500Hz 8 Ohms round Adjustable Threshold less than 1 mic
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