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PRESIDENT uniden BENJAMIN UT-552B Service Manual Download Page 1

Service  Manual

CB TRANSCEIVER

 

Model  BENJAMIN

UT -552B

uniden

CORPORATION

Summary of Contents for uniden BENJAMIN UT-552B

Page 1: ...Service Manual CB TRANSCEIVER Model BENJAMIN UT 552B uniden CORPORATION...

Page 2: ...VER F FREQUENCIES OF LOCAL OSCILLATORS AND IF STAGE IN RECEIVING STATE___________________________ G VOLTAGE CHART TR FED III MEASUREMENT CONDITIONS A SPECIFICATIONS B HOWLING TEST STANDARD C ALIGNMENT...

Page 3: ...TABLE OF CONTENTS H ES2 SCHEMATIC DIAGRAM 1 3 I ES3 0025 SCHEMATIC DIAGRAM 2 3 J ES4 0043 SCHEMATIC DIAGRAM 3 3 K EW2 0022 WIRING DIAGRAM 1 2 L EW3 0032 WIRING DIAGRAM 2 2 VI BILL OF MATERIAL 17 P S...

Page 4: ...ion FM 9 Standard Audio Output 10 Audio Frequency SSB Receive 11 Audio Output Load 26 965 MHz 27 405 MHz 46 Transistors 83 diodes 8 I C s 3 LEDS 2 500 Dynamic Type 16 7 W Max M Type MIKE 4P METAL EXT...

Page 5: ...dB 65 60 FM dB 65 60 SSB dB 65 60 5 Carrier Suppression SSB dB 50 40 6 Current Drain AC at No Modulation AM mA 300 700 FM mA 300 700 SSB mA 150 300 7 Current Drain AC AM MAX Mod AM mA 300 700 FM MAX D...

Page 6: ...SB pv 0 25 0 50 3 AGC Figure of Merit 50 mV for 10 dB change in Audio Output AM dB 90 70 SSB dB 90 70 4 Overall Audio Fidelity 6 dB down 1 kHz ref Upper Frequency AM Hz 2 000 1 500 3 000 FM Hz 2 500 1...

Page 7: ...ect at 2 kHz AM dB 6 3 FM dB 6 3 SSB dB 6 3 14 Clarifier Range AM Hz 1 500 600 2 500 FM Hz 1 500 600 2 500 SSB Hz 1 500 600 2 500 15 Noise Blanker Performance EIA AM dB 3 6 FM dB 3 6 SSB dB 3 6 16 ANL...

Page 8: ...t of up to 5 1 under continuous operation of a duty cycle of 5 minutes transmitting and 1 minute receiving 3 Reverse Polarity Protection Shall h ve reverse polarity pro tection and be operable with po...

Page 9: ...es in luminance 2 When S554 is switched ON check that 19 is displayed on CH LED 3 Check that meter lamp PL551 and 552 are always turned ON Likewise there should be no notable diff rence in luminance 4...

Page 10: ...ltage 220V 60 Hz AC Probe Earth TP10 3 Adjustment STEF MODE MEASURING DEVIC CONNECTIONS PT S BE ADJ PROCEDURE 1 K RX Standby DC Voltmeter to JP32 VR801 Connect WA501 to power source and switch power O...

Page 11: ...it 0 5 pV 10 dB S B S iectvit 60 dB Alimentation sur secteur incorpor e Tension d alimentation 220 V 50 Hz ATTENTION Cet appareil ne doit nas tre expos des projections d eau ou claboussures Comn andes...

Page 12: ...S B S iectvit 60 dB Alimentation sur secteur incorpor e Tension d alimentation 220 V 50 Hz ATTENTION Cet appareil ne doit nas tjp exnns h des nrnientinns d eau ou CiabousstifesK Commandes et fonction...

Page 13: ...fonctions S lecteur de canaux R glage vo lume Squelch Gain micro gain RF Clarifier Vu m tre mission r ception Dimensions mm Longueur335 Hauteur 95 Profon deur 210 1 Volume Marche Arr t 2 Souelch 3 Ga...

Page 14: ...cation 5 RX AM 19 CH Connect freq counter to TP3 L15 Adjust so that frequency is within 16 490 MHz 20 Hz 6 RX FM l Hw Same as Step 5 Check that frequency is within 16 490 MHz 40 Hz 7 RX USB 19 CH Same...

Page 15: ...Note Apply paraffin lock to the portion in diagonal Unes before adjustment Then apply paraffin lock to L13 screw core after adjustment...

Page 16: ...cation is 30 mA 3 USB 19 CH MOD IN Remove DC ammeter connect 002 PB 100 Connect Powermeter RF VTVM and oscilloscope to ANT JACK J501 L34 35 36 37 14 Adjust to MAX the RF Volt meter indication However...

Page 17: ...d LSB 8 AM 19 CH N0 MODE Same as Step 3 VR10 Adjust to 4 0 W the power meter indication 9 AM 19 CH NO MOD Same as Step 3 VR 7 Adjust to RF power 4 the meter indication of the unit 10 AM 19 CH 30 mV MO...

Page 18: ...bly reduce the SSG Att so that the standard output will not be exceeded at all tiraes 3 RX AM 1 40 CH L 5 Adjust to peak at CHI Next alter nately switch CHI CH40 and adjust so that sensitivity d viati...

Page 19: ...PB 122 MAIN TOP VIEW VR8 L26 VR7 VR6 VR5 VRIO 1 1 __ 1 TP8 nn L2 0 1 RI5 LIO TP9 S VR4 D141 _TP10 R113 L U TP5 0 R39 L15L16 L17L20L19 L18 VR3 PB 189 FM TOP VIEW TP13 0 TP12 9 L602 L601 VR6 0 1 O VR2...

Page 20: ...16 4575 10 695 17 27 165 111 16 470 16 4725 16 4675 10 695 18 27 175 112 16 480 16 4825 16 4775 10 695 19 27 185 113 16 490 16 4925 16 4875 10 695 20 27 205 115 16 510 16 5125 16 5075 10 695 21 27 21...

Page 21: ...8 IC602 1 RX 7 7 2 7 1 3 7 4 4 7 7 5 1 6 1 7 1 8 7 8 9 3 3 10 0 11 7 2 12 0 13 7 1 14 0 15 0 1r 16 r 0 SYMB NO PIN NO RX TX VOLTAGE IC 1 1 RX 0 2 2 0 1 3 0 1 4 0 5 1 2 6 1 5 7 0 8 1 8 0 IC 2 1 RX 5 1...

Page 22: ...4 Q15 1 4 7 9 0 7 Q16 0 7 3 4 0 Q17 3 4 6 2 2 7 Q18 r 2 7 6 4 1 9 Q19 RX AM 0 7 0 0 SSB 0 2 9 0 Q20 RX 1 3 4 7 0 8 TX 1 3 4 7 0 8 Q21 2 9 6 8 2 5 022 0 7 4 3 0 4 2 5 6 3 5 Q23 1r 4 2 5 6 3 5 Q24 RX SS...

Page 23: ...Q504 RX 14 4 21 4 13 8 TX 14 4 21 4 13 8 Q601 FM RX 7 2 0 7 8 TX 7 0 7 7 7 7 Q602 FM RX 0 9 3 6 0 1 TX 0 9 3 6 0 1 Q603 RX 0 0 0 NB ON 0 0 0 Q801 RX 6 8 6 2 15 TX 6 8 6 2 15 Q802 RX 15 0 21 4 14 4 TX...

Page 24: ...CUT CH 19 VOLUME SQUELCH MIC GAIN CLARIFIER RF GAIN 220 V 60 Hz 50 ohms 25 C 500 Hz 2 400 Hz Two Tone 1 KHz Single Tone 1 KHz 0 dB IV 0 5 1V 0 5W 8 ohms 19 CH switches volumes etc shall be OFF OFF OF...

Page 25: ...els at N0 MOD W 0 4 MAX 0 4 MAX 6 Power at AM 80 MOD lKHz MOD Increased From N0 MOD 7 MOD Distortion Rate lKHz at 80 MOD FM 1 5 KHz Dev 9 MAX 9 MAX 8 AMC Range Input ratio from 50 MOD to 100 MOD dB 40...

Page 26: ...7 Battery Drain AM MAX MOD SSB MAX Wpep mA 700 MAX 350 MAX 700 MAX 18 MOD Frequency Response Lower 450 Hz 1 000 Hz Standard dB 8 MIN 8 MIN 15 MIN 19 MOD Frequency Response Upper 2 500 Hz 1 000 Hz Stan...

Page 27: ...0 2 000 4 000 L 500 4 000 6 Frequency Response LOWER 1 000 Hz 0 dB 6 dB down Freq Hz 200 500 100 500 200 500 7 Cross Modulation 2 Signa s D S Method dB 40 MIN 8 AF MAX Output Power 66 dB Input 1 KHz M...

Page 28: ...IN 60 MIN 60 MIN 24 Frequency Tol rance Hz within 800 within 800 within 800 25 ANL NB Loss 6 dB Input dB 2 1 2 26 ANL NB Performance EIA Standard dB within 6 within 6 within 6 27 Image Rejection Ratio...

Page 29: ...enter 2 Tune SSG completely with the unit and set to 100 dB N0 MOD 3 Rotate the and make sure that no howling occurs Meter Inspection Standard S Meter At ANT input of 40 52 dB the indication should be...

Page 30: ...of all Controls and switch s conditions b Discharge should be made 3 times with 10 seconds intervals for ail control knobs switch knobs connectors and display window c Repeat similar test as above wi...

Page 31: ...V BLOCK DIAGRAM...

Page 32: ...ANL NB SW S5S1 r o Hl CUT SW S5S2 PTT BENJAMIN UT 552B BLOCK AM B 1 d ia g r a m...

Page 33: ...VI SCHEMATICS PC BOARDS WIRING DIAGRAM...

Page 34: ...3 01 1 ___ 1 0 9 3MHi V C 0i 0 Q l l OUFFER Q22 S wL U PLL MIX o se Q 20 Q23 1 A G C S W Q 9 0 B U F F E R a 6 1 ________ f C A P R I E R B M ose L Q 2 i c 3 T X f i n a l t x ORIVE PRE OPIVE 4__ B P...

Page 35: ...fcx...

Page 36: ...1 R X...

Page 37: ...2SC 6751 C2 2 SC 37 5L 03 2SC1735L 0A 2SC 9 5 AQ CS 2SA733P 07 2SC9ASAC...

Page 38: ...Oi 2SC9ASAO 05 2SA733 07 2SC9A5AC ICI M5223L O O 2SC9ASA0 C 2SC94SAQ 012 5 0C VOLTAGE iS C U SHOWS IX AH COHOITI 6 0C VOLTAGE IM t SHOVS TX SSB C0N01T 7 O C VOLTAGE IN NO HARK SHOVS RX CONOIT...

Page 39: ...LUES ARE INOICATEO IN MICRO FAAAOS UNLESS O TH ERVISE N O TEO IP M ICRQ M ICRO FARAOI 1 A LL CAPACITORS TEfV ER A TU R E CHARACTERISTICS ARE LE S S THAN I0 0 0 P F 1 ZF O O O A T v Fl OR TF C O O O Iu...

Page 40: ...FM SC MATIC DIAGRAM B60I 18 R 621 N 4 7 K 40J V A Q 601 2 S A 7 3 3 A P B ocswNmDKM Y UNIDCH N0 UT 552 MODEL N0 BENJAMIN 4 27 w t TL 3 bj Scbemafic Diagram C W O C KSY P A W tN 4 NO ES4 0043 _ L 4...

Page 41: ...SYNTHETISEUR...

Page 42: ...S O C 2 2 I 2 SCi 6 7 5 L C2 2SC1575L Q3 2 5 C1T 3 OL OL 2SC945A0 06 2SA733P Q7 2 SC...

Page 43: ...Qi 2SC9 5AQ 06 2SA733P 07 2SC9i 5AQ iCt M5223L 010 2 S C 9 i 5 A 0...

Page 44: ...CUl O O I O RECEPTEUR C9 45A iCt M5223L Q10 2SC9i5A Q 2SC9i5A 012 2SC9i5AC EMETTEUR...

Page 45: ......

Page 46: ...i r r OTHERVISE N 0 7E0 U ILO M h 2 RESISTOR VATTACES ARE I 6 V U N LEI 3 CAPACITANCE VALUES ARE INOIC ATEO W ES S O THERVISE NOTEO P H IC R Q t A L L CAPACI TORS TEMPERATURE CHARA ARE S L LE S S THAM...

Page 47: ...SS O TH ERVISE NOTEO IP M C R Q M C R O FARAOI l A L L CAPACITORS TEMPERATURE CHARACTERISTICS AR S L IL E S S TKA I0 0 0 P F 1 IF t O O O O x F l OR VF t 0 0 t F fl 0 3 9 F l UNLESS OTHERVISE NOTEO 5...

Page 48: ...5 7 t S60 VA R S 7 2 560 WV R 5 7 3 S60 VA R S 7 t S60 V A 1 1B IC 10 1 1F 1 G 2A 28 2C 20 2 2 F 2G 4L HS O f f O of O S S S t S W 0 6 2 L v O c O N W C I 1 tn 1 in ir L O tn a a Q Q CH 1 9 ON O S S...

Page 49: ...62 R555 VA CH 19 O0N O 0 55 SV4 6 2 5502 P O W E R VAS02 W 2 S 5 4 J 6 0 1 PG0S6 P 7 06024 005 A1ii T S 0 1 TF422 i _____ VaS O I V2 969 220 240 VAC 50 60 Hz NOTES 1 RESISTANCE VALUES ARE SH0VN IN OH...

Page 50: ...IR OHMS U N L E S S T H E R V I S E N O T E D K I L O OHM M M EC OHMi 1E S IS T 0 R V A T T A G E S AR E 1 6 U N L E S S 0 I H E R 1 S E l A F A C I T A N C E V A L U E R E I N D 1 C A T E 0 IN _ I N...

Page 51: ......

Page 52: ......

Page 53: ...f j R l O 4 7 k R2 d b JL C2 T in 4 7 k R3 4Zb 4 7k J C3 8 p ihR8 1 V l n 1 _X2 1 L CS 4 7 k R7 C8 S p i 4 7 k C7 l n X X3 t m R10 o 4 7 k R l i o CS 4 7k in R12 o 4 7 k R 2 Q l k R27 1K R 3 1 i k IF...

Page 54: ...8 602 1 RX 7 7 2 7 1 3 7 4 4 7 7 5 1 6 1 7 1 8 7 8 9 3 3 10 0 11 C M 12 0 13 7 1 14 0 15 0 1 16 1r 0 SYMB NO PIN NO RX TX VOLTAGE IC 1 1 RX 0 2 2 0 1 3 0 1 4 0 5 1 2 6 1 5 7 0 r 8 1 r 8 0 IC 2 1 RX 5...

Page 55: ...7 9 0 7 Q16 0 7 3 4 0 Q17 3 4 6 2 2 7 Q18 r 2 7 6 4 1 9 Q19 RX AM 0 7 0 0 SSB 0 2 9 0 Q20 RX 1 3 4 7 0 8 TX 1 3 4 7 0 8 Q21 2 9 6 8 2 5 Q22 0 7 4 3 0 4 2 5 6 3 5 Q23 1r 4 2 5 6 3 5 Q24 RX SSB 2 8 6 9...

Page 56: ...5 5 6 0 0 6 13 7 0 Q502 0 6 5 5 0 0 7 13 7 0 Q503 12 8 5 7 13 5 ir 13 0 13 7 13 7 Q504 RX 14 4 21 4 13 8 TX 14 4 21 4 13 8 Q601 FM RX 7 2 0 7 8 TX 7 0 7 7 7 7 Q602 FM RX 0 9 3 6 0 1 TX 0 9 3 6 0 1 Q60...

Page 57: ...5 5 MC 301 1 S V 7 3 E B GL 9HD4 GL 9NG4 2 S C 2 1 6 6 C E 2 S D 8 9 5 E U T 7 T 7 2S A 1012 O 2SC2312 C Cathode 6A1 IZLIZL 2S D1348 R O cj 2SC1973 SSB 2SK192A BL 2SC3242A E LL 2253YL i s V MARKING SI...

Page 58: ...CIRCUITS INTEGRES AN612 L7808CV O OUTPUT IMPUT D2824C PI P2 P3 P4 P5 s P 6 T 0 o NC d D2 VOD J C D pi vss FS A I is 0 1...

Page 59: ...CIRCUITS INTEGRES M5223L OUTi INV INPUT i GND INPUT 2 ENV OUT2 Vdd 1 i NON NON INPUT 2 INV INV TA7320P BALANCED MODULATOR DEMODULATOR...

Page 60: ...CIRCUITS INTEGRES 1242 O NEC J J P C 1 2 I I 2 H d 8 7 5 3 2 f T rrmiW Na juP C t2 2H 1 I t f 2 Ripple fi f ffef 3 Q NO 5 V 0 6 O N T 7 Boot tnap 8 w i CD 0 O...

Page 61: ...0 t s n 5 9 5 f 5 4 195 J f s 0 9 S f 5 4 5 55 f 5 e s w r 5 i s s a r 5t 55 01 5 5 5 4 5 4 S 5 9 f Ot c s s a r 5 4 r s i J f 5 I 5 5 r 555151 0950 SS5ISI 5550 SSSI51 esso 55515 S50 S5S151 9SS 555 51...

Page 62: ...7 5 JP555 1 0 JPSS6 15 JP557 5 JP550 5 Jf 559 7 5 Jf 560 S Jf 56 17 5 Jf 561 5 PL55I PZQ27 14 552 f Z027 567 560 568 560 569 560 570 560 571 560 R572 560 RS73 560 5U 560 551 820 552 390 RS53 12 I 2V...

Page 63: ...56 5 6 561 S6e 566 560 R569 560 R570 560 R571 560 R572 560 R573 560 R574 560 0301 151555 0302 151555 0303 151555 0301 15155S 0305 51555 0306 151555 5301 5R2U m s I muou c eu o i k a u emm o m m S i m...

Page 64: ...DBOfGH...

Page 65: ...OHHS UNLESS 0 T H ER V I5 E N O TED IK K IL O OHH M HEG OHMI 2 R ESIS TO R V A TTA G ES ARE V 8 V UNLESS O TH ERV ISE N O TED 3 CAPAC ITANC E V A LU ES ARE IN O ICATEO IN HICRO FARADS U N LES S O T H...

Page 66: ...6 C 2 D 8 0 2 6A1 D 8 0 3 6 A t D 8 0 4 6A1 D 8 0 5 6 A 1 F801 FS0 23 250V J 8 0 I P G 0 5 6 2 P JP 8 0 I 110 JP 8 0 2 11 7 51 Q801 2SC945AQ Q802 2 S D 13 4 8 R N O T ES t R ES IS TA N C E V A LU ES...

Page 67: ......

Page 68: ...0 2 SCHEMA I...

Page 69: ...A SCHEMA DE CABLAGE S O V du or ______________________________ x _____ A a 1 eue I n________________________ FRONT PCE...

Page 70: ...PLATINE PRINCIPALE SOLDERING...

Page 71: ...4 4 0 1 BRI 80 BOBINE L B 4 5 1 2 BR 181 BOBINE L B 4 6 4 1 2 2 TRANSFORMATEUR T F 4 2 2 1 DC009 DIODE M V 1 Y 2 DC 22 DIODE IS V 7 3 E B 1 S 2 6 8 8 EA 1 H P 0 2 3 HAUT PARLEUR S P 1 6 7 1 1 0 0 0 8...

Page 72: ...1 RV090 P O T E N T IO M E T R E R V 6 4 3 SQUELCH 1 RV091 POTENTIOMETRE R V 6 8 0 1 0 KB C L A R 1 RV092 POTENTIOMETRE R V 6 4 5 1 K B M G A I 1 RV093 P O T E N T IO M E T R E R V 641 1 K A R F G 1 S...

Page 73: ...ETACHEES BENJAMIN 3 REF D E S I G N A T I O N Q T E M O D i i ___________________ I T X 3 0 9 TRANSISTOR 2SB 1 0 3 5 2 T X 3 1 0 TRANSISTOR 2SD 8 9 5 1 TX311 TRANSISTOR 2SD 1 3 4 8 1 j VM015 VU METRE...

Page 74: ...4 2 HERBERT 2SC 2 1 6 6 TC 9 1 0 6 UPC 1 2 4 2 S S 1 2 0 2SC i 9 4 4 UPD 2 8 i 6 TA 7 2 2 2 JACK 2 SC 2 3 1 2 MB 8 7 1 9 UPC 1 2 4 2 GRANT 2SC 2 3 1 2 MB 8 7 1 9 UPC 1 2 4 2 J F K 2SC 1 9 4 4 UPD 2 8...

Page 75: ...3 TA 7 2 2 2 S S 120 ROBERT I S S 3 6 0 RICHARD RONALD 2SC 1 944 5 S 1 2 0 1 FR A N K LIN j F TA 7 0 6 6 MC 700 2SC 2 3 1 2 S S 3 G c o m b i n GRANT JACK I MB 3 7 1 3 M C 6 7 0 0 RONALD I H P F R A N...

Page 76: ...06 T A Y L O R PC 33 43 44 HERBERT 1 SP 053 SS 360 GRANT 1 TC 9109 FRANCOIS JACKSON V A L E R Y SP 052 JFK S S 1 2 0 UPD 281 6 SS 12 R0BERTI JFK SP 154 SP 169 HARRY JIMMY JOHNNY WILSON MB 871 9 GRANT...

Page 77: ...46 27 27 T lex 490534F Fax 67 48 48 49 SUCCURSALE IL E DE FRANCE 50 56 ruedu Pr des Aulnes Parc d activit s des Arpents 77340 PONTAULT COMBAULT T l 1 60 29 28 27 Fax 1 60 28 44 00 VENTE EXCLUSIVEAUX D...

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