Uniden Benjamin Service Manual Download Page 29

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в. HOWLING TEST STANDARD

(CONNECTION)

(Inspection Connection)

1. Set the unit to AM RX Mode and maximize volume.

(Clarifier is at Center).

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

within the range shown

above.

RF-Meter

At N0 MOD, the indication

should be within the range

shown above when output is

4.0W.

All manuals and user guides at all-guides.com

Summary of Contents for Benjamin

Page 1: ...Service Manual CB TRANSCEIVER Model BENJAMIN UT 552B uniden CORPORATION All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 2: ...CAL OSCILLATORS AND IF STAGE IN RECEIVING STATE___________________________ G VOLTAGE CHART TR FED III MEASUREMENT CONDITIONS A SPECIFICATIONS B HOWLING TEST STANDARD C ALIGNMENT PROCEDURE IV B OCK DIA...

Page 3: ...2 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 All manuals and user gu...

Page 4: ...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 SP 3 5 0 Channel Select...

Page 5: ...B 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 Dev FM mA 300 700 SSB MA...

Page 6: ...it 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 1 500 4 000 SSB Hz 2 500 1 500 4 000...

Page 7: ...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 NB Loss at ipV Input A...

Page 8: ...ntinuous 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 positive and negative gro...

Page 9: ...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 Check that TX LED and...

Page 10: ...be 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 ON Then adjust so that D...

Page 11: ...B 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 et fonctions S lecteur de canaux...

Page 12: ...imentation 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 fonctions S lecteur de canaux R...

Page 13: ...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 Gain micro 4 RF Gain 5 Co...

Page 14: ...nnect 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 as Step 5 L16 Adjust s...

Page 15: ...Note Apply paraffin lock to the portion in diagonal Unes before adjustment Then apply paraffin lock to L13 screw core after adjustment All manuals and user guides at all guides com...

Page 16: ...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 adjust MOD input so that output doe...

Page 17: ...E 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 MOD IN Same as Step 3 VR...

Page 18: ...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 viation is within 1 dB 4 RX...

Page 19: ...R8 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 TP32 All manuals and us...

Page 20: ...65 111 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 27 215 116 16 520 16 5225 16...

Page 21: ...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 TX 2 0 3 0 4 5 1 5 5 1 6 0 7 5 1 8...

Page 22: ...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 SSB 2 8 6 9 2 1 TX 2 8 6...

Page 23: ...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 15 0 21 4 14 4 CONDITI...

Page 24: ...CH 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 OFF MAX MIN MAX CENTER MA...

Page 25: ...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 MIN 9 SSB TX MAX Outpu...

Page 26: ...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 Standard dB 8 MIN 8 MIN 10 MIN 20 Low V...

Page 27: ...00 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 MOD W 2 5 MIN 2 5 MIN 2...

Page 28: ...quency 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 fo 910 KHz dB 70 MIN 7...

Page 29: ...tely 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 within the range shown...

Page 30: ...itch 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 with opposite polarity of...

Page 31: ...V BLOCK DIAGRAM All manuals and user guides at all guides com a l l g u i d e s c o m...

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 All manuals and user guides at all guides com...

Page 33: ...VI SCHEMATICS PC BOARDS WIRING DIAGRAM All manuals and user guides at all guides com...

Page 34: ...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 F TX MIX MOO I Q 5 0 Q...

Page 35: ...fcx All manuals and user guides at all guides com...

Page 36: ...1 R X All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 37: ...2SC 6751 C2 2 SC 37 5L 03 2SC1735L 0A 2SC 9 5 AQ CS 2SA733P 07 2SC9ASAC All manuals and user guides at all guides com...

Page 38: ...33 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 All manuals and user guides...

Page 39: ...ICRO 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 F a 0 3 S u FI UNLESS...

Page 40: ...0I 18 R 621 N 4 7 K 4 0J 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 All manuals and user gui...

Page 41: ...SYNTHETISEUR All manuals and user guides at all guides com a l l g u i d e s c o m...

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 All manuals and user guides at all guides com...

Page 43: ...Qi 2SC9 5AQ 06 2SA733P 07 2SC9i 5AQ iCt M5223L 010 2 S C 9 i 5 A 0 All manuals and user guides at all guides com...

Page 44: ...CUl O O I O RECEPTEUR C9 45A iCt M5223L Q10 2SC9i5A Q 2SC9i5A 012 2SC9i5AC EMETTEUR All manuals and user guides at all guides com...

Page 45: ...All manuals and user guides at all guides com...

Page 46: ...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 I0 0 0 P F1 2 F 0 1 Y F O O O W F...

Page 47: ...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 OC V X T A C E IN SHOVS...

Page 48: ...60 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 S S v t S SS 02 P O W E...

Page 49: ...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 OHM S UNLESS 0THERVISE N0T...

Page 50: ...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 l E S S O T H E R V l...

Page 51: ...All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 52: ...All manuals and user guides at all guides com...

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Page 54: ...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 1 TX 2 0 3 0 4 5 1 5 5...

Page 55: ...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 2 1 TX 2 8 6 7 2 1 Q25...

Page 56: ...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 Q603 RX 0 0 0 NB ON 0 0 0 Q801 RX 6 8...

Page 57: ...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 SIDE 2SB525 C MARKING SID...

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 All manuals and user guides at all guides com...

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 All manuals and user guides at all guides com...

Page 60: ...RCUITS 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 All manuals and user guides at all guides c...

Page 61: ...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 5550 sssm 550 9 CSSO OHGIO SO HCSt...

Page 62: ...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 556 12 1 2V RS5S 22K 55...

Page 63: ...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 t o C 4 M 0 H L U i wic...

Page 64: ...DBOfGH All manuals and user guides at all guides com...

Page 65: ...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 ER V IS E NOTED IP M 1...

Page 66: ...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 ARE SHOVN IN OHHS UNLESS O T H ER V...

Page 67: ...All manuals and user guides at all guides com...

Page 68: ...0 2 SCHEMA I All manuals and user guides at all guides com...

Page 69: ...A SCHEMA DE CABLAGE S O V du or ______________________________ x _____ A a 1 eue I n________________________ FRONT PCE All manuals and user guides at all guides com...

Page 70: ...PLATINE PRINCIPALE SOLDERING All manuals and user guides at all guides com...

Page 71: ...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 C I R C U I T INTEGRE L 7 8 0 8 1...

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Page 73: ...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 M T 2 2 7 1 j All manua...

Page 74: ...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 1 6 MB 3 7 1 2 S S 3 6...

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