Knight-96_499-tape-sm 电路图 维修手册.pdf

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1、PnoToFACT* FolJt KNIGHT riloDEtS 96-144, 96-499 Or o T I o ;- -. rrI +* e+ 3t ln J EI o o = =o E llt F UI ri iE .5i I 5 I Figure 1 GENERAL INFORMATICN rhe Knight Models g6-144and g6-4gg Tape Recorders are designed to magnetically record on a 5 or ? reel of l/4, wide tape, two tracks instead of one w

2、hich doubles the playing time with no loss in frequency response or quality. rhese models 96-144 and g6-4gg Recorders are identical except f or the speed. Model 96-144 is 7-l/2, per second while the Model 96-4gg is g-B/4 per second. Model 96-144 7-t/2 per second - ? reel - l/z hour playing time one

3、track, or t hour playing time - two track operation Model 96-499 - 3-B/4 per second - ? reel - t hour playing time one track or, 2 hours playing time - two track operation. These Recorders incorporate two Inputs - Radio and Microphone, two outputs - Ext. Amplifier and Ext. speaker, Fast Forward and

4、Fast Re- wind. The Knight Recorders may also be used as a p.A. system. Allied Radio C orporation 83.? West Jackson Boulevard, Chicago ?, Illinois TOHE YOLUME c0lTR0t fhis msteriol compiled ond published by sAtls ji t: * Figure 2 CPERATING INS TRUC TIONS trreparing the Knight for Recording - 1. Inser

5、t the Iine cord in a convenientwall receptacle of the proper rating. 2. Place a reel of tape on the right hand spindie in such a manner that when the tape is pulled, the reel will turn clockwise. Make sure the pin on the spindle engages a slot of the reel. NOTE: This recorder requires tape with Type

6、 B winding, i.e. the (dull) magnetic coated side faces out on the reel. In case the (dull) side of the tape f aces in onthereel (TypeA wound tape) it can be changed to Type E for use on this recorder by winding the tape with a half twist. The two types are identical ex- cept the way in which they ar

7、e wound on the tape. 3-. Place an empty reel on the left hand spindle (2a). 4. trull about 2 f.e et of tape from the supply reel, drop the tape into the slot between the trim covers (4 and 6). Guide the tape into any one of the three openings at the center of the empty reel. Use a pencil to hold the

8、 tape in place, then turn the reei several turns clockwise to secure the tape to the reel and to remove all slack in the tape. 5. Turn the Cff -On-Tone Control on. This supplies power to the entire recorder. Page 2 To Make a Recording - 1. After the recorder has been properlyprepared for recording,

9、connect the microphone to the ?Mike? jack. 2. Press down on the Record button above the volume control. 3. Turn the r Volume control clockwise u n t i I the incoming signal causes the F-ecord Level Indicator Eye to close on high peaks only. NOTE: Correct recording volume is very important. Too weak

10、a signal, which does not cause the Recording Indicator to close will result in weak playback and high background noise. Too strong a signal, causing the Indicator to ove rlap will result in distortion dur ing playback. 4. Turn the tape mechanism control knob (1) to PIay- Record position. Any sound n

11、ow entering the micro- phone will be recorded on the tape. NOTE: Make sure Skip Forward control is in the Normal position, if not the mechanism will not operate. To fi.ecord Direct From Radio - t. If a recording from a radio is commended that a connector cord desired, it is re- be connected to the R

12、adioFans.CN 收音机爱 好者资料库 ,*t ,;:r ii ,! /4 6il ,j td *t i ,: irffi -,. J f r4ffi*. : . l l, l:i :ttl% 8 r ffi * * T t I J fta) 3 o E, trt F UI r2 IE .s= o i I q. . / -J uv Figure 3 speaker voice coil of the radio, by means of alligator clips, and the other end (using a standard phono plug) of the cord

13、 plugged into the Fadio Input. 2. Better quality recording from a radio set can be obtained by connecting to the output of the second de - tector (usually right across the volume control of the radio set). This kind of connection may be desirable in some cases, because any circuit deficiencies in th

14、e amplifier of the radio will not be included in the re- cording. To Record From Record Plaer- 1. Connect the output leads of the crystal pickup to the Radio Input jack through the connecting cable. 2. If the player has a. magnetic cartridge connect to the output of the preamplifier. To Stop the Rec

15、order - The recorder may be stopped at any time by turning the mechanism control (1) to r Offrt. This stops the movement of the tape and removes the power to the motor. Two Track Recording - 1. The Knight is designed for two channel recordings, therefore, after a reel of tape has been recorded a sec

16、ond track may be recorded on the same reel, which doubles the playing time with no Ioss of frequency response or quality. NOTE: Recordings are made on l/2 the tape width at a time; thereby, resulting in two channel re- cording. 2, This two channel operation is accomplished by re- moving the reels f

17、rom the recorer, turning them over, then placing the f ulI reel of tape on the Feed Reel spindle (18) and the empty reel on the Take Up spindle (24). 3. Thread the tape and proceed with the recording in the same manner as previously described. 4. After this track has been recorded the first track of

18、 recording is ready to be played without rewinding. 5. To Play the first track of recording piace the full reel on the Feed li,eel spindle and the empty reel on the Take Up spindle. Thread the tape making sure the (duII) side of the tape faces the heads, then set the control as described under To Pl

19、ay a R,ecording . Io Rewind The Ta t. To rewind a portion of the tape, or an entire channel of recording for playback, the tape must be rewound to the starting point of the recording. 2. First make sure the recording light just above the Tone control is out. If not, depress the record button above t

20、he Volume control. 3. Turn the mechanism control (1) to Rewindr . Page 3 RadioFans.CN 收音机爱 好者资料库 t t, f To Plav a Recordi 1. Make sure the tape is threaded properly. 2. Be sure the record light over the Tone control is out. 3. Iurn the mechanism control (1) to trIay-iiecord position. 4. Set the volu

21、me and tone controls at desired levels. Fast forward - The control marked Skip Forward-Neutral-Normal on the left side of the upper control panel enables you to skip forward at high speed to any desired section of the tape. This control is to be used only when the tape is moving forward in the plav

22、position. Iurn the con- trol to the lef t through the Neutral position and into the Skip Forward position holding it there until the desired place on the ta-pe is reached. Then release the control by allowing it to spring back into rNeutral. Then, move the control backinto tt Normaltt. To Plav a Rec

23、ording Through an External Amplifier - 1. Frepare a shielded c able with the proper plugs, connecting one end of the cable to the Amplifier Cut- put of the recorder and the othe4 end to the phono .t-age 4 ti ;.ii; iii ry-: input of any good radio set, or high-fidelity record player amplifier. To PIa

24、v a Recording Through an External Speaker - 1. Any external FM speaker having a3.2 ohm voice coil may be plugged into the External Speaker jack output. vVhen an external speaker is plugged in, the internal speaker is automatically disconnected. Using the Knight Recorder as a tr.A. Svstem - 1. Plug t

25、he microphone into the Radio jack. 2. Be sure the recording light above the tone control is out. 3. Keep the microphone as far as possible from the unit to avoid feed back or rhowlr and adjust the tone and volume controls to your requirements. ADJUSTMENTS Motor Power Switch - (See Iigure 4) - 1. The

26、 Off -On-Tone control when turned on supplies power to t h e entire mechanism, however, the motor will not run until the mechanism control knob (1) is turned to either Record-PIay or Rewind trosition, causing the switch (51) to make contact. Therefore the switch contacts should be open when the mech

27、an- ism is in Stop position. ;i:-T,i: if however, the rewind drive pulley (3?) is located in a hanger whose position is adjusted by bending the Stop lug (3?A), see Figure 3, against the swing plate pushing in a manner that will allow a clearance between the drive roller (5?) and the re- wind pulley

28、(3?) in the Stop position. This will also allow the drive roller to engage the drive pulley in therRewind position. In this position, the re- wind drive pulley hanger lug (3?A) is moved away from the stop. The rewind drive pulley (3?) is firmly held against the motor drive pulley (5?) by the torsion

29、 spring (39) that needs no adjustment. Pressure Lever and Arm Adjusting Plate - Set the pressure lever (15), see Figure 2, so that it is perpendicular to the pressure arm (29A) when the control knobis in the Record-Playback position. Also adjust the arm adjusting plate (298) so it will clear the pre

30、ssure arm (29A) bV l/64, ,yhen in this position. Detent Lever (38) - (See Exploded View) - The roller of the detent lever (38) should be adjusted so that it will engage the detent lever (16) at point X, as shown in the exploded view, when the controt is in the Off position. Motor Transfer Lever (41)

31、 - f he motor transfer lever (41) shoul.d be adjusted when the control is in the tOff, position. To adjust the transfer lever (41) loosen its set screws and move the motor plate (51) until the motor drive pulley (5?) is midway between the rewind drive pulley (37) and the flywheel (40), then tighten

32、the scrervs. Head Fressure - The head pressure is adjusted by means of the two screws (14A) in the slotted holes in the head bracket (14). See Figure 2. To make the adjustment, turn the control knob (1) torRecord-Playtr position. Loosen the screws (14A) then adjust the head into the tape guide block

33、 11) until the pressure pads (11A) show a movement of slightly less than l/32, on the reverse side of the tape guide (11). - Head Alignment - The lateral movement of each head is done by moving the heads in the required direction by means of the screws in the slotted holes that hold the heads to the

34、 head bracket (14). The position should be such that there is no hanging up of the tape pressure guide when the control lever is turned to the Off position. Make sure after the heads are adjusted that they are parallel with the tape as it is pulled past the heads. TROUBLES Irregular SpeedrWowrt - 1.

35、 Felt pressure pads (11A) in tape guide assembly (1 1) worn. (a) Replace with new pads. 2. Oilor greaseon drive roller (5?), flywheel assem- bly (40), or pressure roller (?). (a) Clean with alcohol. 3. Head pressure too great (see adjustment on IHead Pressurer). Be careful not to disturbthe head ali

36、gnment. 4. Check pressure roller lever (1b) to see if it is perpendicular to the pressure arm (2gA). When in the Record-Flay position. See Adjustments on r pre- ssure Lever and Arm Adjusting plate. 5. Drive roller (5?) or pressure roller (?) eccentric. Allow mechanism to run for 20 minutes. ff after

37、 this time the rollers are still eccentric, replace with new rollers. 6. Motor shaft binding. Motor shaft should turn free- ly when the control knob is in the Off position. If necessary, realign bearings by tapping motor lighily with a wooden mallet. ?. Detent spring (26) not properly connected. See

38、 Figure 2. If spring (26) is not connected, the detent slide (36) will not be held against the detent lever (38) resulting in the motor drive pulley (5?) not being held in firm contact with the capstan. Motor Runs but Mechanism Will Not Operate - 1. Motor transfer lever (41) not adjusted properly. S

39、ee Adjustments on Motor Transfer Lever, and The Forward Stop Lug. 2. Drive roller (57) defective. 3. Fast forward control in r Neutralt position. (a) Turn contr.ol to tr Normalr . Mechanism Runs Forward But Will Not Rewind - t. Checkdrive belt (35) for treing broken or loose. Replace. 2. Motor trans

40、fer lever (41) not adjusted properly. See adjustment on Motor Transfer Lever (41) . Mechanism Rewinds But WiIl Not Run Forward - 1. Forward stop lug (52) out of adjustment. See Ad- justment on rr Forward Stop Lug. =o (, |lt F ta s2 i0 .Ai T I Page 5 Page 6 3 o E ltt F ta 82 iE Fi o t I ; trage 7 Con

41、trol Knob and Shaft Turns Bu!Mechanism Fails To Run 1. Motor transfer lever-(41) loose on shaft. Readjust as described under r Motor Transfer Lever. Mechanism Iails to Run in Fast Forward - 1. Check drive belt (4?) to see if it is properly connected. 2. Mechanism control (1) not in the Play-Record p

42、osition. The mechanism must be in the play-Record position before power is supplied to the motor and also for the drive putley (5?) toengage the capstan which in turn drives the fast forward pulley (48). SIow Speed - 1. Low operating temperature. 2. Head pressure too great. See?Head Pressurerr adjus

43、tment. 3. Flywheel (40) shaft binding. Check to see that the screws holding the mounting plates (20) and (b0) to- gether are tight and that the plates are not warped. 4. Motor shaft binding. Realign bearings by tapping lightly on the motor. lfachine Will PIay Back but Does Not Record - 1. Defective

44、microphone. 2. Defective Record-Playback head (12). 3. Defective Amplifier. High Background Noise (Hiss) - 1. Defective bias oscillator tube or circuit. 2. Defective tape. 3. Defective Record-Playback Head. 4. Record head magnetized. Demagnetize with 60 cycle AC air core coil. Incomplete Erase - 1.

45、Erase voltage power too low. 2. Erase head (13) open. RepLace. 3. Record head lamination dirty. Clean with carbon tetrachloride. 4; Record head (13) not making proper contact with felt pressure pad (11A). See Head Pressure ad- ju.stment. Poor Recording - 1. Record-Playback head (12) not at right ang

46、le to the ta-pe. See Head Alignment adjustment. 2. Overloading during recording. 3. Defective or damaged head. 4. ilead lamination damaged or worn. 5. Felt pressure pads (11A) worn or missing. Replace. 6. Head pressure too light. See Head Pressurerr adjustment. irage B ff* r+ry ,ll G t . * a- t + ,*

47、 # # * , * : ?e # iffi.*3 # ffL* ffi s ffiffi# w # ffi# BGG#q? i.rtffie. *, k # # F r.!- * ir * *# e G il # ., . ffi 4$* #T *r* :r- * 3 o I Itt F UI 8i i0 ii I o t I Page 9 ffi ry # t Page 10 =o E ll| F ta 82 iF .5* o I h .6 2 Or- E6 fio x.a al oo Qfi Il F EH ts frr i2 iti c2 :y 5.o -rE ur qEB o td

48、E: Gs il3 F o o F lo. F) o tr lrl ; P I u .n o trl o t ltl , 1iLI9*, B !d*t fi E teRg # Page 11 Mechnical Parts ListEle-ctrical Parts List Ref . No.Description Ref . No.Description 1 2 3 4 5 6 I 8 9 10 11 t2 13 l4 15 16 t7 1B 19 20 2l 22 te 24 25 26 21 2B 29 30 31 32 33 34 tc 36 31 38 39 40 4l 42 43

49、 44 45 46 47 4B 49 50 51 52 53 54 55 56 51 58 59 60 61 Control Knob Set Screw for item 1 Plate Mounting Screws Rear Trim Cover Trim Cover Spacer Front Trim Cover Pressure Roller Take up Reel Control Knob Base Plate Mounting Screw Base Plate Tape Guide Assembly Record Head Erase Head Head Mounting Bracket Head and Pressure Roller Lever Pressure Arm Spring Roller Plate Return Spring Rewind or Supply Shaft Assembly Sub Mounting Plate Spacers Sub Mounting Plate Pressure Release Lever for Fast Forward Take Up