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Yaesu MEMORIZER FT-227R Instruction Manual
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Yaesu MEMORIZER FT-227R Instruction Manual

Yaesu MEMORIZER FT-227R Instruction Manual

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INST RUCT ION
MANUAL
FT-227R
MEMORIZER
YAESU MUSEN CO
LTD.
,
TOKYO
JAPAN.

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Summary of Contents for Yaesu MEMORIZER FT-227R

  • Page 1 INST RUCT ION MANUAL FT-227R MEMORIZER YAESU MUSEN CO LTD. TOKYO JAPAN.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS ( P age) G E N ER A L · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · S P ECI F ICA T I O N S ·...
  • Page 3 FT -22 7-R MEMORIZER 2 METER FM TRANSCEIVER GENERAL The model FT-227R is a new synthesized 2 meter FM transceiver specifically designed to provide high performance for amateur VHF /FM communications. The transceiver utilizes the famed Y aesu computer theory, and is com­ plete ly solid state.
  • Page 4 The advanced circuit design features prevent damage to the tran­ sistors in case of high antenna VSWR, or reversed power supply polarity. The FT -227R is manufactured with a high regard for quality, utilizing a diecast front panel and a heavy gauge metal case which provides an extremely rugged package which minimizes the effects of shock and vibration.
  • Page 5 HOW TO USE THE TAP CONNECTOR Do NOT strip insulation from wires. The tap connector will handle most wire sizes used in automotive instrument panels. Slice the "hot" lead into tap connector as shown. Insert transceiver power lead 3 /4 of the way into connector (just past metal connector element) .

  • Page 6: General

    SPECIFICATIONS GENERAL 14 8 Frequency Coverage MHz>!< Number of Channels channels>!< 3" Speaker Internal dynamic speaker with provision for connecting an external ohm dynamic speaker Microphone Dynamic push-to -talk microphone with retractable coiled cord. 13. 8 Power Requirement Volts DC, - Current Consumption Amps Receive 1.

  • Page 7: ·Installation

    RECEIVER Double conversion super­ Type heterodyne 10. 7 MHz first IF: 455 kHz Intermediate Frequency second IF O . 3 for 20 dB quieting Sensitivity kHz at 6 dB: - 12 kHz at Selectivity 60dB 1. 5 Watts at 8 ohms Audio Output ·INSTALLATION GENERAL...
  • Page 8 MOBILE INSTALLATION For mobile service, the FT -227R should be installed where the controls, indicators, and microphone are easily visible and accessible for operation. The unit may be mounted in any position without loss of performance. Suitable locations are under the dash, atop transmission tunnel, etc.
  • Page 9 The supplied power cable may be plugged directly into the vehicle s cigarette lighter receptacle for casual operation if desired. For permanent installation, the lighterplug may be removed and the leads routed directly to the bat­ tery (red positive, black negative or ground) , or the nearest termination to the battery, i.
  • Page 10 CONTROLS & SWITCHES The FT-227R has been designed for ease of operation. However, the operator may not be familiar with some controls since it util­ izes modern computer technology. Be sure you throughly under­ stand the function of each control and indicator before operating the equipment.
  • Page 11 DIAL Display The digital display indicates the operating frequency. METER The meter indicates the signal strength on receive and the relative power output on transmit. MIC receptacle Four pin connector is used for microphone input and push-to - talk relay actuation. MEMORY switch When pressed, the frequency on the d ial is memorized and M...

  • Page 12: Rear Panel

    REAR PANEL Figure 6 POWER receptacle A two-pin connector is used for connection to 13 . 8 Volts DC (negative ground) power source, vehicle battery, or AC power supply. SP receptacle Audio output is provided at this receptacle for an external speaker. (Output impedance is 8 ohms and the internal speaker will be dis - abled when a plug is inserted) .

  • Page 13: Operation

    OPERATION INITIAL CHECK Rotate the VOLUME control switch in a clockwise direction to apply power. The meter will illuminate and the channel frequency is automatically set to 147 . 0 0 0 MHz (with S kHz up at depressed position) regardless of channel knob position. However, a mem­...
  • Page 14 The MR l amp li ghts up and the m emo rized fr e quency i s di splayed on the dial wind o w . When the MR switch i s p r e s s ed a g ain, the f r e qu ency g o e s b a c k to the frequency p r e s e t by th e u s e of the channe l s el e cto r knob .

  • Page 15: Block Diagram

    IP1Fl659 - MAfNUNiT-- -- -- - ------ --- ---- -- - -- - ---- ----- ----- - - -- -- 1 0 . 71.t1z 455kHz 0103 0106 01 os 0109 DI06 DI07 0113 0114 0116 BP F 3SK4 0 M BP F 2SC372Y 2SC372Y...

  • Page 16: T Heory O F Opera Tion

    T HEORY O F OPERA TION The bl o ck di a g r am and th e c i r cuit de s c ription that follow s will p r o vid e you with a b e tte r und e r s tanding o f thi s tran s c e ive r . R e fe r to the s ch ­...
  • Page 17 I f the tran s mi tte r i s keyed without an antenna being c o nne c ted, o r , if a high VSWR exi s t s in the antenna s y s t e m, the r e fl e cted pow e r is de - te c ted thr ough T 2 0 2 and a diode , D 2 0 8 , ( 1Sl 8 8FM) whi ch p r odu c e s D C voltag e .
  • Page 18 T he s e cond circuit con s i s ts of Ql 0 6 , Ql07 , Ql 0 8 , (2 S C 3 7 2 Y ) and Q l 0 9, ( p. P C 5 7 7 H) . The c a s c ad e c o nne c ted c e r ami c filte r s C Fl O l a nd C F 1 0 2 p r ovide na r r ow band s el e c tivity fo r the r e c e ive r and the limit ­...
  • Page 20 The output voltage fr om Q3 1 5 i s r eve r s ed in pol a r ity by Q 314 , ( 2SC 3 7 2Y ) and applied to the Q 6 0 6 , ( 2SC3 7 2Y ) ke e pi ng the c o ll e cto r o f Q 60 6 in "H"...
  • Page 21 011 ( 2SD235D) fed through the voltage regulator, which is controlled by the HI LOW switch and the automatic final protection circuit. 0605 (,uPC14305) V oltage regulator, regulates the supply voltage at 0313, ( 2SC372Y) 0308 Volts to supply and the display unit, ( RD6, 8 EB) D301, regulates the supply voltage at...
  • Page 22 O PTIONAL TON E SQUEL C H C IR C U IT The To ne Squ el ch ope ration p e rmi t s p rivate c ommuni c ati ons on c rowd ed channel s . The tone s qu e l ch c i r cuit di s abl e s the audio c i r cuit o f r e c ei v e r until a p r e s e t ton e s i gnal i s r e c eived .

  • Page 23: Main Ten An C E & Ali Gn Men T

    & MAIN TEN AN C E ALI GN MEN T GEN ERAL The rriodel FT - 2 2 7R tra n s c e ive r ha s b e e n c a r e fully ali gned and te s ted at the fa ctory prio r to s hipment .
  • Page 24 R O U TINE MAIN TENAN C E Routine mainte nanc e s hould be limited to ke e ping th e tran s c e ive r c l e an , and p e riodic p e r fo rman c e che cks o f the trans mitte r R F powe r output and the r e c e ive r s en s i tivity .
  • Page 25 AL IGNMENT SOME OF THE F O L L O WI NG ALI GNMEN T P R O C EDURES R E Q U IRE S P E CI AL TES T EQU I PMEN T AND TEC HNIQUES AND S HO U LD ONL Y B E D ONE B Y AN EXP ER T TE C HNI C I AN .
  • Page 26 ( 2 ) AF P ( Autom ati c Final P r ote c tion) C o nn e c t the Y P -1 5 0 to the ante nna c o nn e c to r . Set VR2 0 5 to the ext r em e C C W po s ition .
  • Page 27 ( 5 ) Tone Bu r s t C onne ct a dummy l o ad t o the antenna conne cto r and YP-150 di s co nn e ct the mi crophone to p r event a ccidental voi ce mo dula - ti o n .
  • Page 28 ( 3 ) S Mete r S e n s itivity Apply the s i gnal g ene r ator output to th e ante nna c o nne cto r . P ea k Tl 0 2 fo r maximum S mete r r e ading . S e t the output l e vel o f the s i gnal g en e r a to r to 2 0d B and adj u s t VRl Ol fo r full s c ale indi cation on foe S m e te r .
  • Page 30 "' "' � � " "' "' " � � � � � ;:; (.) ...J > . cr ...J T P 1 Q2 0 6 V R 2 o s L 2 o :i V R 2 0 3 T 2 0 1 L 1 0 1 Q 2 0 4...
  • Page 31 � "' '<:!' t""i " :") x x x x x x ':!' :"') :") :"') <t '."l cr cr T 4 0 2 T 4 o s PLL U N I T D I S PLAY U NI T - 2 9 -...
  • Page 32 P A R T S L I S T M A I N CHASS I S 94000041 FT- 16P ( Vol ume ) Nu mb e r S y mbo l Numb e r De s c ri p t i o n 94000042 FT- 16PA ( Tx S e l e c to r ) 94000040...
  • Page 33 P A R T S L IS T 40143222 Carbon F i l m Y. W - VJ 2 . 2KD. C207 , 2 1 4 , 2 1 7 , 223 30820 102 Ceram i c 50W V O . OOlµF Rl49 , 1 6 1 , 2 2 1 , 23 3 RIZ0 , 2 10 40143272...
  • Page 34 P A R T S L I S T PLL UNI T R30 1 40143474 Carbon F i l m Y. W - VJ 470KO N u mb e r S y mbo l N u mb e r De s c ri p ti o n P r i n ted C i r cu i t Board PB- 1757A 60317571...
  • Page 35 P A R T S L I S T TRI M M ER CAPAC I TO R CAPAC I TOR TC3 0 1 39000069 TZOIY 070A Ceram i c C703 , 705 , 706 30820102 50WV O . OO lµ F 39000 0 1 1 ECV- l Z W M y l ar F i l m...
  • Page 36 P A R T S LI S T ACCESSOR I ES TONE SQUELCH U N I T Pa rts Pa rts S y m b o l N u mb e r Numb e r De s c r i p ti o n S y mbo l Numb e r Nu mb e r De s c ri p ti o n...
  • Page 37 T R A N S � T O R & � C O N N E C T � N S D R A I N S O U R C E. S U BS T RA T E A N D C A S E �J-'C: 2SK 1 9Y 2S K 1 9G R...
  • Page 38 Q 3 0 8 (µ P D 857C) PR O G R AMMAB L E DIVID ER COD E I N P UT P IN --> Q 30 8 P R O G RAMMA B LE --> /J 3 0 5 -->...
  • Page 41 Meus mais sinceros agradecimentos a generosidade de PY2WFG Wilson da Willtec Comunicação por ceder este e centenas de outros manuais para serem scaneados. Se voce baixou um manual raro de equipamento nacional ou importado, provavelmente veio do Wilson. Scaneado em Nov. 2021 por PU2SEX Alexandre Souza DISTRIBUICAO GRATUITA - www.tabalabs.com.br/esquemateca...
  • Page 42 YA E S U 712-A...