Knight-35DU713-tape-sm 电路图 维修手册.pdf

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1、!= r*l CC) el -l t- et l*l LV) / KNIGHT MODEIS KN.4O75 (35DU7t3), KN-43|O (35DUSO7 R nO lo o3 $a )3 VY Iq9 EO alt gs l.A -() OF Il J Ee I -y a Ul- ea F1 I1 fo G)I Y -10 Lg tltr 6i, I aA 9,4 E5 CO o our J GENERAL INFORMATION The Knight Models KN-4075 and KN-4310are three-speed, stereophonic tape reco

2、rders. These units play back 2- and 4-track stereo and mbna.ural recordings and record 4-track gtereo or monaural material. Themajor differences in these recordersare in the amplifiers. Recordings can be made from a microphone, radio, phonograph, tuner, or TV set. Speaker jacks are provided for conn

3、ecting external speakers. Model KN-4310 is a complete record and playback unit. Model KN-40?5 contains pre- amps for recording, however, external amplifiers and speaker systems are necessary to play back prerecorded material. These unlts operate at 7 L/ 2, 3 3/ 4, andl 7 / 8 ips. A two-positlon equa

4、lization switch tot 7 l/ 2, 3 3/4 and L 7/ I ips ie provided. These recorders operate on lI5-120 volt, 60 cycle AC only. Supplied By: Allied Radio 100 North Western Avenue Chicago 80, lllinois HOWARD W. SAMS i3.-Jli;,j:tT,ff:H* ffiil:l speed serector Interlock prevents tape movement. -Hold the Recor

5、d slect8 the sped at rrhlch tapes are recolded, Interlock down Iehle 8ttlng record levels. | 1/ S, S g/ 4, a i i/Z ip.- -CLff spled whue untt vorume t8 .peratng onlv Model KN-43I0 hsa T#iiHr31rXr*?- l3im! Record Lever I ndi cators only Show correct recordlng level for each chanlel Record Level ( Mod

6、el KN-4075 only) when recordlns AdJuEts therecord level rhen Eeklrg a record- Speaker Switch (Model KN-4310 only) ttg. Turns both channel speakera on or off. Channel Selector Normal-Sound on Sound Switch ( Model KN-4075 onlYl slects chetmel I or chamel 2 for roneural r- used to addEaterial on one tr

7、eck rith meterlel cordlngs or bdh channels for stereophonlc recordlngs. betng recorded on the other track. PAGE 2 RadioFans.CN 收音机爱 好者资料库 0utput I and Output 2 Model KN-4075 only) back prerecoded tape are connected to these jaclis. - High Level lnput I and High Level lnput 2 ( Model KN-4075 only) Us

8、ed to connect a TV set, tuner, phono, or other high level source to the unlt for recording. Mic I and Mic 2 (Models KN-4075 and KN-43I0) Used to connect the microphones to the unit for recording. Radio-Phono I and Radio-Phono 2 Model KN-4310 only) Same as theHigh Level Inputs on Model KN-40?b. INPUT

9、 AND OUTPUT JACKS O PERATI NG I NSTRUCTIONS Magnetic lnput I and Magnetic lnput ( Model KN-4075 onlyl Used to eonnect a phono with a magnedc cart- rie to the unit. External Speaker I and External Speaker 2 ( Model KN-4310 onty) External speakers can be connected to the unit by inserting the speaker

10、plugs into these jacks. When e:rternal speakers are connected to these jacks, the speakers in the unit are disconnected. Threading the Tape I. Plaee a full reel of tape on the supply spindle and an empty reel of the same size on itre tate- up spindle. 2. Unwind about 18 inehes of tape and thread it

11、through thehead slot making sure the shiny side of the tape is facing the front of the recorder. 3. Insert the end of the tape lnto one of the radial slots of the reel. Rotate the reel several times to secure the tape and take.up any slack. To Make a Monaural Recording l. Thread the tape as describe

12、d under Threading the Tape. 2. Insert the plug from the microphone or other program source to be used into the proper input jack. 3. On Modet KN-40?b, press down on the Head Elevator tab marked l/ 4 Track. 4. Turn the power on and allow sufficient ttme for tubes to warm up. 5. Select the speed to be

13、 used byrotating the Speed Selector to the desired speed. 6. Set the Egualization switch to correspond to the speed being used; I 7/ B, g 3/ 4, or i ty Z tps. 7. Turn theChannel Selector swltch to the Channel I position. 8. To set the record level before beginntng the actual recording, press and hol

14、d Aown the ne_ cord Interlock button and adjuet for the correct recordlng level. 9. Tobegin therecording, holdtheRecordlnterlock down and at the same ilme, rotate theplay-Stop control to the play posttion. 10. When therecording is finished, rotate the play- fi _ Stop control to thJStop positidn. U x

15、 4 -Track Monaural Recording S 6 Use thesame procedure asdescribed under to 9 I Make a Monaural Recording. After track I is com- pletely recorded, do not rewind the tape. Turn the X 3 reels over and rethread the tape. Leav! the Channel Z O Selector in the Channel I position. The material will i. Et

16、now be recorded on track B. When track 3 is com_ 6 E pleted, turn the tape over. Move theChannel Selecto, i h switch to Channel 2 and continue recording on track i - _ to the end of the tape. Leave the Channel Selector in i 4 the Channel 2 posltion and turn the tape over. Now fr f the material will

17、be recorded on track 4. E B To Play Back 2-Traek Stereophonic Tape I d (Model KN-4075) 5 l. Thread the tape as described under Threading the Tape. 2. Push down on the Head Elevator tab marked l/2 Track. 3. lloye the Play-Stopcontrol to the play position. On Model KI.I-43I0, switch the speakers on by

18、 movlng the Speaker switch to the On position. 4. Adjust the Volume controls to the deslred ligten_ lng level. 5. To stop the tape, move the play-Stop control to the stop position. At the end of the tape, the transport will shut off automatieally. To Wind or Rewind the Tape Move the Rewind-Forward c

19、ontrol to the direc_ tion desired. To stop the tape, move the Rewlnd_ Forward control to the center position. To Make 4 -Track Stereophonic Recordings l. Thread the tape as described under Threading the Tape. TT o tr rft F PAGT 3 RadioFans.CN 收音机爱 好者资料库 2. 3. 4. 5. 6. Plug the cables from the sound

20、source into the proper lnput jacksl Channel I and Channel 2 input. Place the Record-Playback head to the 4-track position by pushing the Head Elevator tab marked I,/4 Track down. Preset the recording levels by pushtng down on the Record Interlock button and holding it down while setting the record l

21、evel for each channel. To begin the recording, hold the Record Inter- lock buttondown and at thesame tlme, move the Play-Stop control to the PIay posltion. When side I is completed, turn the tape over and record side 2. To Use the lndex Counter When making a recording, eet the index counter to 000 p

22、osition when the tape is threaded on the transport. At the end of each selection, note tre read- ing of the index counter. This makes it posslble to find deslred selections when played back. To Erase the Tape If it isdesirable to erase the tape without read- ing new materlal on the tape, follow the

23、normal re- cording procedure, however, disconnect the inputs andturn the Record Level controls (Model KN-4075) or Volume controls (tvtodet KN-4310) to the maxlmum counterclockwlse position . DISASSEMBLY 2. 3. l.Place theunlt on a level surfaceand remove the Itd. Remove the push-on type knobs. Remove

24、 the screwe securlng front and rear escutcheons andpull up on escutcheons. Remove Record Level indicator plugs on Model KN-40?5. UnsolderRecord Level indicatorleads on Model KN-43r0. 4. Remove screws from head cover (5) and re- move cover. 5. Remove screws securing dress plate (?) and remove dress p

25、late. Remove screwa holding input panel plate and remove plate. Remove screws from sldes, baek, and bottom holding transport in the case. PuIl transport up and out of the carrying case. On Model KN-4310 unplug speaker leads. To reassemble the unit, reverse the foregoing procedure. 6. 7. 8. 9. ADJUST

26、MENTS To Align Record-Playback Head ( Model KN-40751 l. Place the head in the up position by pushing tlte left tab of the Head Elevator down- 2. Connect an AC VTVM across the left channel output. 3. Thread a 4 -Track prerecorded alignment tape on the -transport and move the Play-Stop control to the

27、Play poeltlon. 4. Loosen the stde mounting screws and raise or lower the head until the top ee of the tape ls even witJr the top edge of the upper pole piece. 5. Adjust the azlmuth adjusting screwfor maxlmum output as read on the AC VTVM. To Align Record- Playback Head ( Model KN-43 t 0l The Record-

28、Playback head on the KN-4310 ls permanently mounted tn the 1/4 track positlon. The same procedure may be used for the KN-4075. To Align Erase Head Loosen mounting nuts and set tte Erase Head (10) so that the top edge of the upper pole piece ig even wtth the top edge of tte recording tape. PAGE 4 Bra

29、ke Adjustment l. Check to see that the Brake Arm (49) ls per- fectly parallel with respect to the Speed Selector mounting bracket. 2. To adjust the brake arm (49), loosen either the right- orleft-hand screw holding thebrake cord to the motor mounting bracket. Taking up slack or releaslng tension on

30、brale cord moves the brake arm lnto the proper position. NOTE: If brake tension is adjusted, the Auto- matlc Stop switch adjustment must be checked. Pressure Roller Tension Adjustment l. Wtth nopower applied, move the Play-Stop con- trol to the Play position. 2. Ustng a pull scale connected to the p

31、resaure roller, determine the amount of pressure re- quired to pull the pressure roller away from the capstan shaft. Pressure should be from 22 to 24 ounces. 3. Adjust the pressure roller pressure by bending the tab on the Play Lever and Cam assembly (36) untU the correct preaaure ie obtalned- q) (r

32、t - z2 f6 (,E Y = zo bE 6i, x cnZ 9rl E5 6 6ta J TROUBLE CHART 79 81 78 B? 7,5 74 Zt 52 49 3e 40 4L 28 ; * e a * * ,i# .,;Yl,l, f # t e*ri ffid .* ;p #i :i d8* Il ,. .fr- t! Frr s, , S*.,*e $.; s5 60 38 s8 57 5644 4661 45 43 33 31 29 19 F IG. 2 BOTTOIU V IEW OF MECHAN ISIVI SYM PTOM CAUSE REMEDY Tap

33、efails to movein Playor Record mode. or dirty pressure roller spindle binding. l. Clean or replaeepressure roller (t5). 2. Clean supply spindle shaft or loosen brake cord. 3. Inereasetension asdescribedun- der Pressure Roller Tension Adjustment. 4. Replace or connect idler wheel tension spring (45).

34、 2. Adjust brakesas descrlbedunder Brake Adjustment. 3. Replace forward or rewind belt (33). Idler pulley arm (56) should haveLl16 + L/32 travel from left to rightTn Stop position. 4. Remove idler pulley (46); clean shaft. Oil and replace pulley. l. 2. Worn (r5). Supply 5. Shafts of ldle! arE plvot

35、(53) 5. Clean shafts or straighten plate. FolTerd or Rewlnd mode. worn. 3. Insufficlent pressure roller tension. 4. Idler wheel spring (45) weak or dlsconnected. 2. Brake cord (3S) too tight. 3. Forward or rewlnd belt (33) broken or too tight. 4. Idler pulley assembly (56) blnd- ing. .t l o E rn n l

36、. Pressure roller (15) too tlght agalnst capstan. l. Adjustas descrtbedunder Pres- sur e Roller Tension A djustm ent. Varlation ln tape speed. PAGE 5 TROUBLE CHART ( CONTD. ) SYMNOM CAUSE REMEDY 2,. 3. 2. 3. Oil or dirt on capstan, ldler wheel (61), idler pulley (46), or motor puUey. Pregsure pad sp

37、rings (24) and (25) too tight. Clean these parts with a soft cloth and alcohol. Loosen springs by bending anchor back. No Speed change. Arm of speed change bracket (52)has jumped out ofgroove of tdler arm (56). Speed ellding post gummed up or corroded. Support bracket of idler arm (52) Jumped to lef

38、t of playlever and cam bracket (36). Repositlon arm in groove. Stralghten speed change bracket (62). Clean or replace sliding post and apply a thin coat of oll. Bend support bracket (52) down so it will clear top of play lever and cam bracket (36). l. l. G. 3. 2. 3. Automatic stop does function. l.

39、Automatic stop swltch lever bent out of posltlon. l. Adjust lever so spitch actuates when lever passes line of tape travel. Incomplete erasure.Erase head (10) dirty. Erase head out of posltion. l. Clean erase head (f0) with soft cloth and alcohol. 2. Adjust erase head as described under nlo Allgn Er

40、ase Head. rt l. 2- Recordings weak or dis- torted. Worn Record-Playback head. Rec ord-Playback head dtrty. Replace head. Clean Record-Playback head with soft cloth and alcohol. l. 2. l. 2. CLEAN ING Pressure roller-(lb), capstan, recording heads, and erasehead should be cleaned odcasstonaliyof liri

41、and foreign matter wlth a soft cloth and alcohol. LUBRICATION These recorders do not require lubricailon under normal use. When dlsassembled for repair, wipe all bearlngs and slide levers with a clean soft cloth and apply a thin coat of oll on the surfaces. Descriptlon 22 23 24 25 26 27 28 29 30 3l

42、32 33 34 35 36 I 2 3 4 5 6 7 I I r0 ll t2 l3 L4 t5 l6 T7 l8 l9 20 TS-2152 TK-289 TK-290 TE-317 TE-317-t TP-1518 960108-l TA-1992 TA-1989 TH-584 TII-590 TG-53? TP-1500 TB-2073 TB-2130 TR-1846 TW-464 TA-1488-l TB-1067-r TK-288 Spindle, Reel Knob, Top Sectlon Knob, Lower Sectlon Knob, Channel Selector

43、Cover, Head (Model KN-40?b) Cover, Head (Model KN-4910) Meter Escutcheon Dress Plate (Model KN-40?5) Dress Plate (Model KN-4910) Front Escutcheon (Model KN-40?b) Front Escutcheon (Model KN-4310) Record-Playback Head Erase Head Post, Tape Guide Plate, Head Mounting Bracket, Record-Playback pressure P

44、ad (Model KN-40?5) Bracket, Record-Playback pressure Pad (Model KN-4310) Ring, Retaining Roller, Pressure Wire Form, Record-playback pad Releaee Plate Pressure Roller Assembly B:acket, Pressure Roller plate Stop Motor Board Knob, Rewlnd and Forward TB-2073 TB-2I30 TB-20?3 TB-20?6 TB-2137 TS-1755 TS-

45、1993 TS-2245 TC-174? TR-1614 TA-II83 TS-2085 TA-265 TB-1018-5 TS-2086 TS-2244 TA-U76-l Bracket, Recond-Playback Head Pressure Pad (Model KN-40?b) Bracket, Record-Playback Head Pressure pad (Model KN-4910) Bracket, Record-Playback (Model KN-40?5) Bracket, Erase Head pressure pad (Model KN-40?5) Brack

46、et, Erase Head pressure pad (Model KN-4310) Sprlng, Record-Playback Head Pressure Pad Tension Sprlng, Erase Head Pressure pad Tension Sprlng, Head Azimuth Adjustment Spring, Cam Lever and Brake Arm Counter, Tape Belt, Tape Counter Drive Counter and Brake Pulley Spring, Brake Cord Spindle, Pulley Bel

47、t, Rewind and Forward Shaft, Rec ord-Playback lead Llfter Swivel Spring, Pressule Roller Tenslon Lever, Play and Cam Assembly MECHANICAL PARTS LIST PAGE 6 MECHAN ICAL PARTS LIST ( CONTD. Ref. No. 62* 68 69 ?0 ?r 72 73 74 75 76 77 78 ?9 80 8l 82 39 ITB-1050 TA-1744 A-L252 A-1225 TS-2041 TS-35?6 Ts-19

48、93 TA-1489 7 ITA-1743 TA-1170-2 I lra-uzg-r 51 ITP-r008 52 lte-uzz 53 ITA-il74-l 54 ITB-r012 56 ITA-1163 57 ITS-r981 58 ITL-367 59 ITA-U64 Swivel, Record-Playback Lifter (Model KN-4075) Cord, Brake, 24 Long Bracket, Brake Cord Retainer Flywheel and Capstan Aesembly Plate, Flywheel Thrust Idler Relea

49、se Rod Spring, Compression, Take-up Spring, Forward Spring, Idler Wheel Idler Pulley Assembly Rod, Push Automatlc Shut-off Bracket Assty. Lever, Brake Release Actuator, Automatic Strut-off Plate, Speed Selector Locking Arm, Speed Change Support Idler Arm Pivot Assembly Bracket, Speed Selector Sprlng, Speed Seleetor Arm, Idler Pulley Assembly Spring, Rewtnd Link, Rewind Spring Pulley, Brake Pulley, Rewind Wheel, Ifler * TR-1548* TP-1003 TM-4r5 TS-r963 TA-1993 TA-1990 TF-342 TF-34?-2 TL-387-l TA-1691 TS-35r5 TS-3516 TA-l?34 TS-3514 TA-1768 TA-U29 TS