RMI_368X_Service_Manual 电路图.pdf

lgp mm-: y 2. Permits performance unmatched by any other system; 3. Provides a high degree of reliability. KEYBOARD CONSTRUCTION -The individual note keys are completely interchangeable and individually adjustable. The action is quiet -it has all the excellent characteristics and quality associated with a wood action. CONTROLS -Foot control unit is standard equip ment; a pedal provides full range expression from silence to full output; a separate pedal produces piano sustain. Rocker type on/off switch has built-in pilot light. The-Accenter gives a percussive attack to the harpsi chord or lute sound, as desired. The Organ Mode permits all stops to be played as an organ, without the normal percussive decay. SAMPLE TONE POSSIBILITIES - Electronic Bass -The keyboard is a full 68 notes extended to low F, thereby providing the useful range of an electronic bass. With the Lute stop depressed, the RMI Electra-Piano can be used to provide an excellent electronic string bass accompaniment Honky-Tonk Piano -By depressing the Piano and Harpsi stops an authentic rinky-tink sound can be achieved. These are a few. There are many other unique and interesting combinations possible. BASS BOOST CONTROL -Mounted on the stop panel is an additional sliding control for the bass section. This makes it possible to increase or vary the amount of bass power at will. A startling effect of sudden waves of bass tones can be achieved. CONNECTIONS -Foot control has two plugs at the end of suitable cables -they are easily plugged into jacks under the piano and since one is larger than the other, you cannot make an error in plugging them in. T line cord and a 10 shielded cable with jack for plugging the piano into the amplifier. Both are permanently attached. An AC outlet located under the instrument permits switching amplifier on and off with the RMI Electra-Piano. AMPLIFICATION -The RMI Electra-Piano it complements the great sound. DIMENSIONS - Height Width Depth Open 35 3/4 42 5/8 23 3/8 Closed 9 3/8 42 5/8 23 3/8 POWER -105-125 volts, 60 cycles, only 10 watts. ACCESSORIES -Optional accessories include extensions for the legs which raise the unit for convenient stand-up playing. Rocky Mount Instruments, Inc., Sales Office: Macungie, Pa. 18062, Phone: 215/965-9801 Subsidiary of Allen Organ Company COPYRIGHT .61074 RadioFans.CN 收音机爱 好者资料库 The RMI ELECTRA-PIANO and harpsichord is the all new instrument for sound-thinking combos who are bothered by the problems of piano availability, tone, tuning, and transportation that limit and hamper the jobs they play. These problems are solved by the RMI ELECTRA-PIANO and harpsichord the all-electronic piano that delivers the truest portable piano tone available. Its the one with no strings or struck bars to get out of tune. The one with harpsichord and various novelty-effect stops that allow you to change your sound at will. And the littlest big feature of all: its weight here is a piano that only weighs about 80 pounds including its slim, modern, self-contained legs. All of these features, plus a 61 note keyboard and expression- sustain pedal, clearly make the RMI ELECTRA-PIANO and harpsichord a real sound investment for small combos on the move. The RMI ELECTRA-PIANO and harpsichord is another of the unique sound ideas from RMI instruments. Plug into one at your nearest progressive music store. ROCKY MOUNT INSTRUMENTS, INC. Subsidiary of Allen Organ Company MACUNGIE,PA. 18062 RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS RMI ELECTRA-PIANO 2. Permits the instrument to be quickly switched from Piano to Harpsichord, to Lute, or any combination of these sounds; 3. Provides a high degree of reliability. CONSTRUCTIONThe keys are completely inter changeable and individually adjustable. The action is quiet it has all the excellent characteristics and quality associated with a wood action. CONTROLS Foot control unit is standard equipment; a pedal provides full range expression from silence to full output; a separate pedal produces piano sustain. Rocker type on/off switch has built-in pilot light. TONE SELECTORS - Piano Lute Piano PP Organ Mode Harpsi Accenter Harpsi PP The Accenter gives a percussive attack to the harpsi chord or lute sound, as desired. The Organ Mode permits all stops to be played as an organ, without the normal percussive decay. SAMPLE TONE POSSIBILITIES - Electronic Bass The keyboard is a full 61 notes and is extended to include additional notes at both the bass and treble ends. When the Lute stop is depressed, the RMI Electra-Piano can be used to provide an excellent electronic string bass accompaniment. Honky-Tonk Piano -By depressing the Piano and Harpsi stops an authentic rinky-tink sound can be achieved. These are a few. There are many other unique and interesting combinations possible. CONNECTIONS-Foot control has two plugs at the end of suitable cables -they are easily plugged into jacks under the piano -and since one is larger than the other, you cannot make an error in plugging them in. 7 line cord and a 10 shielded cable with jack for plugging the piano into the amplifier. Both are perma nently attached. An AC outlet located under the instrument permits switching amplifier on and off with the RMI Electra-Piano. AMPLIFICATION-The RMI Electra-Piano can be plugged into any high quality music amplifier with good results. For the best results, it should be used with the RMI-140A amplifier. This is a special purpose amplifier, with its own separate treble system, designed to bring out the fantastic upper range sound capabilities of RMI portable keyboard instruments. Another advantage of the RMI-140A is the availability of the RMI Razer-a super articulator which provides even more brilliance-to the highs. MATERIALS it complements the great sound. DIMENSIONS- Open Closed Width Depth 42-5/8 23-3/8 42-5/8 23-3/8 POWER -105-125 volts, 60 cycles, only 5 watts. ACCESSORIES -Optional accessories include a removable music rack, and extensions for the legs which raise the unit for convenience in stand-up playing. ROCKY MOUNT INSTRUMENTS, INC.,Sales Office: Macungie, Pa. 18062, Phone: 215/965-9801 JLlh The Model 368 ELECTRA PIANO . . . -.; $UBJECT 3: ORGAN MODE CIPHER . .-.:. :.;-.i SUBJECT 4: CIPHER WITH SUSTAIN PEDAL SUBJECTSS : A SINGLE NOTE HAVING A .SNUBBED1! OR SHORT SUSTAIN SUB JECT 6: INSTR UCTIONS FOR fTUNING RMI GENERATORS SUBJECT 7: INSTRUCTIONS FOR CURING PROBLEM OF STICKING -;-i AND/OR CLICKING KEYS ON ELECTRrAPIANOl SCHEMATICS AND PICTORMATIC LAYOUT . ! , SUBJECT 1: FIXING A DEAD NOTEffOEM THE ELECTRA PIANO Beforetioirig any tetiri -OV /;?.!.*/. ! 1. ;/ / ; r,-: -V r /.,/. Trouble Shooting a Dead Key 1. Depress Piano stop. / ? /t L K . :r ; 2. Make sure key contact is clean and making. 3. Attach a clip lead in series with a 220 ohm resistor to the B+ terminal at the right end of the generator board. Touch the T : other end of the clip lead to/pbint MD/. It -the oscillator plays, , you have isolated-the problem to the keying clrcult(pricceed to 8M below). But, if the oscillator is still dead when keyed at !D prodeedais follows: / rfv ,:. v ?., 4. With B+ applied to point lfD through a 220 ohm resistor, measure )the DC voltage at point HDn A zero reading indicates a shorted keying capacitor; C7*. A very low. reading indicates a shorted blocking capacitor C8# 5. Take a low ohms scale resistance reading across points A11 to B. A zero reading indicates a shorted tuning capacitor -C9. : . .:I : - -Av yy- 6. Take a low ohms scale resistance reading between points flCfl and A and then lfCn and lfB. This measures each side of the oscillator coil. Both readings should be identical. If they are not, a defective coil is indicated. 7. Take a resistance reading across resistor R17. Reverse the leads and measure again. The one reading should be approximately ten times higher than the other. If both readings are similar, this indicates a defective transistor. 8. If in 3 above, the oscillator operates when keyed at !lDfl, then proceed as follows: 9# With a clip lead, short across capacitor C5, and depress the key. If the oscillator now plays, this indicates an open capacitor. 7reas:ui?6 aiii A,;zerp reading bail* dir :.:; sHdrtd;dic?gi: - i ?-v.;r;(.-. ;. .; / .; , !f-,?fA 13; If all the stbOyg dhecfc but tiOfrraallyr replace the tr P N0ISE WHMLAY3/NGAN CERTAIN NOTES Tjiis cpriditipil efti feeiciued by k cdicj -9pldh JQiritflia theLiidio bliss bar line w;hich riiris the length of the tone generator, and is located just behind hfe bddiiltdtiiife; dii thfe scheiiiktic thi? dllde SPLIT C3ROUND *ftse hdethkttHeaxe sesifetars soldat VHpusppintSSlQng:1 * this line. If the above condition occurs, carefully chepk each spide# -: connection along this line and resolder where necessary* Of course, the above procedure assumes that the strtiplifierfepBiifcerSystem .-. -.r-. .- If a certain pitch sounds continuously when the Organ Mode stop is used, the trouble is usually caused by a defective diode* CI17. The location of this diode is shown on the pictprmatic layout drawing. When replacing this 11 -. ffljie .( pypyities i?toe bass i som hbrs.j 9, fla?( in the; i f 4iei pMPv Gpiqweni rhenMCjje.c jSjpbirved, it is necessary to lower the setting of the bass control to the point where no distortion occurs. SUBJECT 4; CIPHER WITH SUSTAIN PEDAL If a certain note sounds continuously only while the Sustain pedal is 9irransIstbrV ffieocatidri of WhichIrinudiaife6d on the pfdtor- J rnatic layout drawings Apparently in some environments a conductive appears eta tfte surface o$ theI trfatiSiatorheretKe leaftfe lpstici;,Ue ai$gllScrewdriver/ior; simrlPPinted object, and scrape along the surface of the plastic, between the center #nd Bid* leaclU i,s t when yotorthig; otherwisei;the ;taisistorpa*i bej buried dpa .riot curie the condition, only then replace the transistor. Another cause for this condition is the 2 ml capacitor, C6, the location of which is also shown on the pictormatic diagram. Observe thec riiarkings, iU 8?epl :t|cr%tjcsiusia dead note? peure tGiipss-th6 c is at 1. Put one of the tone stops down; for example, Lute. 3. Wedge the lowest note on the HeyfeehaydLpii Ufpii/) even after the souncj of the note dies away. 4* Hold the sustain pedal on. 5. Start at the high end of the keyboard and play one note at a time, listening for the length o$/#*etaip.,j.The e with .dpfe diode will have a sustain TtibffW5brt(e:c4ir ifi . . f . Adding capacity tq any.given tuned circuit willlower thfreguencyj Oix iiraeljepvlpg capacity from any rgiyen tiuied circuit will raise .its frequency e mallest of the tuning; jctpacitbrs C, sfipuH be phpsen | as /the ope tochange * in other words, if a generator cannot be maie sharp enough ;With thecontroj, it will be necessary to reduce the capacity-. u re,moyQ one of the mall value tiinihg capacitors .aiid replace it with the I next smaller sxze ft %s neqessjary to liaye some type of pitch standard pxi reference -!r J as,vtlie Conn, Strbboturieror PeteTsoii Tuner, or A tuning fork for those who can set a teinpeameiit%y feaR l Several paodels of audio ostcillatof reference ,ctevices for tuning puppses | Tqb esesiqLly zero beat the ftiytt unit. I Ectt tuier cpnynieritly sq you hay eas. access to the seijctbr s a patch cord between the tuiier arid the output pf If you wish to listen to the sound as well as see the strobe paitern use an ?tRCA audio tfYfl connector at the generator output, trs First set the tuner gain control to produce the best pattern contrast* generator can then be tuned in the usual way changing the tuning adjustment to produce iir;:-o-: the pointer to stop the pattern in case movement is noted. Instead of tuning successive notes in each octave, e tuning peVices One note, say A3 (A abov6 miSdler 6) ischosen to Wt note is tuned tq? a s|;andar(| spurqe, usually 440 cycles, whiph might cpp from atunijiigwfe*!r!afffiertum6xit, or an elhirohiH sinditd Th xxt;sie| $ttb oundtherl;3 ancf 53; ThW :t4ilT louih;J toethe E3, is larval U ajjrtij.pajL fltect.beat* As before, the lower or flattest of the two musgenerat6V, ofitavyreitheh n?o5zkrolJ6atti? f ; j All of the following notes are to be taken from the third octave (from middle C T7=T7rTr (continued) 1. Use Piano and Organ Mode Stops. 2 Set A to tuning fork or other standard (440 cycles). 3. Sound A and E tuning E about 1-1/4 cycle under or flat. 4. Sound E and B tuning B about 1-1/4 cycle under or flat. 5. Sound B and F# tuning F# about 1-1/4ycle-wndep or flat. ;v 6. Sound F# and C# tuning C# abot1-1/4; cycle under or flat. ;-. r, 7.; Soiid eycle undr or flat. , 8 Sound G# and D# %upingjtt abdut ; or flat, 9. StfiiilclJ6# apd A$ funfng# aojut: 1-1/4 cycle iindr or flat. 10. Sourid A# and F-tiJHinTi? abQiit 1-1/4 cycle uhdef* or flat.* ./. 11 # Sound F?Lnd C turfitijC. 4b<?Mi.J.SX/,4 5ycle up.dr oV. flat.*-v 12. Sound C and d tuning Gboiit 1-1/4 cycle under or flat* y 13. Sound G and D tuning about 1-1/4 cycle under or flat. 14. Sound D and A tunMg about 1-1/4 cycle under or flat. *r Ifjthe A does not automatically seem approximately right in-relation to theD, then it is necessary to back up so as to even out the temperament. If the A is too flat, it shows that the previous notes have been tuned too flat, and it is necessary to slow11 their beat. In listening, car$ must b$ taken that one tdue to the /. SUBJECT 7: INSTRUCTIONS FOR CURING PROBLEM OF STICKING T, AjND/OR CLICKING; KEYSy QN. ELECTRA PlANO ;: : I: 1* Open lid by removing two thumb screws on Jbottorn of instrument,. 1. Remove black keyboard facer trip by removing the two round head slottedM V-.,. , . . m m .-.I. . . .* U TONE : amd STOP SECTtOU BOOST CIRCUIT VOLUME COV1TR0U SGOO EXPRESSOM PEDAL CIRCUIT ALLEN ORGAN C0.r Ei-HT.rA F/iNC y.ZZZL. 3i 2 TOWS ChAN2R C KiOCK C.C i PICTORMATIC LAYOUT r.RMI 368 a 668 OSCILLATOR a KEYING CIRCUIT SPLIT GROUND BUS LI CIO RI8 03 R16 5-RI5 C8 RI7 ORGAN MODE BUS RfO ;cr6rgan TCR GND. :R6 R5 CR6: :1 STOP SWITCH-GROUND w 1 BUS (STOPHfJFF) KEY ,NPUT SUSTAIN PEDAL BUS ;C 1 8 85L I . 55 8 t l or o 5 r r* -.-*- u s W 8 tl 11 * moo o w o n ORGAN CRZ BUS r Rt R3 -lfo f M* 5 . ,.V/ .,* -. 9 BUS 4ICV FKO1A OSCLLATOR: PITCH SPUT .GSOUUO RESV5TOa SCALE UUTC ID SPLIT QROUMO KEStSTOR,