Knight-92RU774-tape-sm 电路图 维修手册.pdf

ctt c= l- Hffi -l l- et Lrl rvi, This recorder operates on 60 cycles, 105-120 volts AC only. Supplied By: Allied Radio 100 N. Western Avenue Chicago 80, lllinois KNIGHT MODEL KN-4O6O (92RV774 I 7/8 ips 4 hours 6 hours 8 hours Printed in U.S. of America stT 537 -oEmmE 7L/2ips I hour l. / 2 hours 2 hours rt I N 3 c, Cl o F tt., IO 9X z+ Y) v J lr| A o =o (, Il F x ?x 5Z 8a OE 19 *t c D GENERAL INFORMATION Knight Model KN-4060 is a three-speed tape recorder and can play back both monaural and stereophonic recordings. Model KN-4060 will record and play back both monaural and stereo when connected to an appropriate amplifier system. Recordings can be made from a microphone, radio, phonograph, tuner, or TV set. This model has three tape speeds, 7 I/2, 3 3/ 4 and f ?/8 ips. A two-position equaliza- tion switch for 7 L/ 2 ips and 3 3/ 4 ot I ?l I ips is provided. Using both tracks, recording times are as follow: Tape Lengt 1200 ft. 1800 ft. 2400 ft. 3 3/4 ips 2 hours 3 hours 4 hours HOWARD W. SATUS in this case, the stop button must first be depressed. Stop Applies brake to botlt spindles and returns all pushbuttons to neutral. Record Moves the play-record switch into record posi- tion. Rewind Returns tape rapidly to supply reel. Moves wind-rewind pulley, increasing tension on rewind belt Rotary Speed Selector Selects the desired tape speed: 7-I/ 2, 3-3/ 4 or i-?/ 8 ips. This control cannot be turned unless the pushbuttons are in the Stop position. Equalization Switch Equalizes the response f.or 7-L/ 2 ips speed in the up position, for 33/4 and l-?/8 ips speeds in the down position. PUSHBUTTONS which turns the supply sPindle. Wind Moves tape rapidly in playand record direction. Moveswind-rewind pulley, increasing tension on rvind belt which turns the takeup spindle. Play Moves the tape for playback (or recording, if Record button is depressed simultaneously). Brings pressure roller and pressure pads into position against the capstan and record head. Pause Stops the tape by removing the pressure roller f rom the capstan and applying the brakes to the spindle. Record or playback settings are not disturbed. The input and output jacks are located on the rear of the recorder. The top left jack is channel I input and lower left jack is channel 2 input. The two middte jacks are for monitoring; the upper for chan- OPERATI NG Threading the Tape Place a reel of tape on the left spindle; empty reel on right spindle. Thread the tape in slot with shiny side toward the front of recorder. Insert loose end of tape into one of the slots in the empty reel and turn reel cowrterclockwiseto takeup slack inthe tape. To Wind or Rlvind Tape Depress ttte Wind or Rewind button to move the tape in the desired direction. Depress the Stop button to stop the tape. The recorderwill stop automatically at the end of the reel. To Make a Monaural Recording Plug the microphone into the Low Level input jack. Set the rotary Speed Selector to the desired speed. Turn the power on with the On-Off-Volume Page 2 INPUT AND OUTPUT JACKS nel I and the lower for ehannel 2. The two jacks on the right are the output jacksl the upper for channel I and the lower for channel 2. I NSTRUCTI ONS control #1. Allowsulficient timefor the tubes towarm up. Depress the Record button and adjust Volume control #1 so the level meter will go into the red por- tion on the loudest passage. Ilold the Record button down anddepress the PIay button until bothare locked inthe down position. If both buttons willnot stay down or a buzzing sound is heard, the tape is not properly threaded. Depress the Stop button at the end of a re- cordingl at the end of the tape, the recorder sriU stop automatieally. Hold the microphone approximateiy eight inches from themouth when recording voice. Place the mic- rophone two or three feet in front of the loudspeaker when recording from a radio, phonograph, or TV set. Ilold the Pause button down to interrupt a record- ing briefly. The recorderwill continueto recordwhen the Pause button is released. RadioFans.CN 收音机爱 好者资料库 * ffiry F IG. 1 TOP V I EW OF MECHAN I SM W I TH ESCUTCHEON REMOVED 3 o I Irt F ?- 5Z 8a OE - )o 7 C s It is possible to record directly from a radio, phonograph, tuner, or TV set by eonnecting a patch cord between the High Level jack and the desired instrument. To Play Monaural Recordings Thread the tape as deseribed under Threading the Tape. Connect the recorder to an amplifier system. Depress the Play button. Adjust Volume #1 control. Turn Volume #2 fuffy counterelockwise. To Play Stereophonic Tapes Connect the recorder to a stereo amplifier. Thread the tape and turn the recorder on. Depress the Play button and adjust Volume controls #t and #2 until tte volume level meters are fluctuating equally. To Make a Stereophonic Recording Plug one microphone into the upper input jack and another microphone into the lower input jack lo- cated on the rear of the recorder. Rotate the On-Off- Volume control #l clockwise to turn the power on- Adjust Volume control#l and Volume control#2 sothe Level meters will register the same on the loudest passage of sound. HoId Record button down and de- press the Play button until both are locked into posi- tion. If both buttons will not stay down or a buzzing noise is heard, the tape is not properly threaded. Hold the microphone approximately eight inches from themouth when recording voice andtwo or three feet from the loudspeaker when reeording from a radio, phonograph, or TV set. Hold the Pause button down to interrupt a re- cording briefly. The recorder will continue to record when the pause button is released. Head Lifter Push left lever of headlifter down forfour-track recordings, and right lever down for two-traek re- cordings. To Edit and Splice Tape Sinceone track cannot bespliced without affect- ingthe other, recordingsto beedited should belimited to one track tapes. Unwanted portions can be cut out and the desired selections joined together. Tapes should be cut at a slight diagonal and the ends joined together with splicing tape on the glossy side. Exeess splicing tape should be trimmed from the sides of the tape. N0TE: Use splicing tape only. Do not use regular cellophane tape. O trt Ff1 v o Page 3 RadioFans.CN 收音机爱 好者资料库 ,*t h,# g j : r$t dlt * * $ F *i *i E j *:1 To Remove Recorder from Case I. Remove the escutcheonf rom jacks. 2. Remove five screws from four bolts from side. FIG.2BOTTOM V IEt/V OF MECHAN I SM DISASSEMBLY 3. the input andoutput Set case on side and slide the mechanism for- ward. 4. Reverse foregoing procedure to reassemble. Loosen mounting nuts at side of head mounting bracket assembly (42). Set top of upper gap even with top of tape. Tighten mounting nuts. Adjust for maximum output by turning alignment screw, on right side of mounting bracket, while playing a prerecorded alignment tape. Repeat steps 2 and 3. bottom of case and ADJUSTMENTS Erase Head z. Loosen mounting nuts and set erase head sothat top of head gap is even with top of tape. Tighten mounting nuts. 3. Record-Playback Head l. Put head in up position by pushing down on left 4. tab of head mounting bracket assembly (42). CLEAN ING Pressure roller (22), capstan, and recording head (25) should be cleaned oceasionally of dirt and foreign matterwith a soft cloth moistenedwith alcohol. Page 4 LU BR I CATI ON These recorders do not require lubrication under normal use. When disassembled for repair, wipe all bearings andsliding levers with a clean soft cloth and apply a thin coat of oil to their suraces. TROUBLE CHART SymptomCauseRemedy Tape f ails to move when Play button is depressed. l. Worn or dirty pressure roller (22). Supply spindle binds. Not enougli pressure to hold pres- sure roller (22) against flywheel (54). 4. Idler wheel spring (55) weak or 4. missing. 5. Posts of idler arm pivot (56) 5. rusted or plate bent. l. Clean or replace pressure roller (22). Clean supply spindle or loosen brake cord. Increase tension of back tension spring (72). Pressure should be L6-24 oz. Replace idler wheel spring (55). Clean posts or straighten plate. 2. 3. 2 3 Tape fails to move when Wind or Rewind button is depressed. Idler belt(63)slipping or missing. Brakes (12?) too tight. Wind or Rewind belts (64) broken or too tight. 4. Idler pulley assry. (65) binding. 4. l. Clean or replace idler drive belt (63). Loosen brake cord (12?) from the mounting stud side. Replace wind or rewind belt (64). Idler pulley arm (61) should have L/16! l/32 travel from left to right in idle position without stretching the belts. Remove i.dler pulley (65), clean shaJt on arm idler pulley assy., oil, and replace pulley. l. 2. 3. 2. 3. Variation in speed after reeorder has been in opera- tion. l. Pressure roller (22) too tight against flywheel (54). Oil or dirt on flywheel (54), idler wheel (58), idler pulley (65), or motor pulley (i24). Wind-Rewind belts (64) too short. 4. Pressure pad springs (16) and(l?) 4. too tight. Adjust as mentioned in remedy 3 of first symptom. Clean surfaces of these parts with an industrial cleaner. Adjust idler pulley arm (61) as mentioned in remedy 3 of preced- ing symptom. Loosen springs by bending anchor back. 3 o E llt F x ?- rz 8a o- 19 F c I l. 2. 3. 2. 3. No speed change.Speed change bracket (lll) arm jumpedout ofgroove ofidler arm (?5). Speed sliding post gummed up or corroded. Support bracket of idler arm (?5) jumped to left of play lever and cam bracket (71). I.l.Reposition speed change bracket (l1I) arm in groove. Tighten lever retainer spring (92). Straighten speed change bracket (lU). Clean or replace sliding post and apply a thin film of oil. Bend support bracket (?5) down so it will clear top of play lever and cam bracket (?l). 2. 3. 2. 3. Automatic stop does not function. l. Solenoid arm (104) too far from solenoid. l. Bend solenoid arm (104) so that there is no more than lrl 8 clear- ance between solenoid arm (I04) and solenoid. Incomplete Erase.Dirty erase head (3f). Defective electrical components. Clean erase head (31) with soft cloth and alcohol. Check voltages and resistances. Replace defective part. I. 2. l. 2. Recording weakordistorted. l. 2. Dirty record-playback head (25). Defeetive electrical components. Clean record-playback head (25) with a soft eloth and aleohol. Check voltages and resistances. Replace defective part. l. 2. T1 O qf, n o Page 5 CHANNEL I A Howcrd w. sqmr !$SfS rmro PRINTTD BOARDS CIANNEL 2 ARROWS INDICATING TUgE TOCATIONS ARE POINTING TO PIN I UNLE5S OTHERWISE INDICATED CHASSIS-BOTTOM VIEW Page 6 3 o E rll F x 7x trz 8a OE -a -l )9 v c tr -rr o I rrt n o A PHOTOFACT EXPLODED VIEV o Howrrd !/. Sror I Co., lK I 96 I Page 9 FIG.3A EXPLODED VIEW OF PARTS ABOVE BASE PLATE A PHOTOFACT EXPLODEIT VEV oHowrrd V. Srnr tCo., hc l96l FIG.3B EXPLODED VIEW OF PARTS BELOW BASE PLATE Page l0 3 o E trt F ?- IZ 8a OE r-r d I t9 n c e FIG.4 BOTTOM VIEW OF MECHANISM WITH MOTOR MOUNTING PLATE RTMOVED O (f rrt n o Page I I MECHANICAL PARTS LIST Ref . No. Part No.Description Ref . No. Part No.Description I 2 3 4 5 6 7 8 9 10 ll L2 r3 l4 15 16 l7 I8 19 2A 2L TP-1249 TS-2r52 5133-25 TA-I488 TB-2151 TE-276-3 TS-r993 TS-1902 TA-1349 TS-1985 5133 -25 On-Off -Volume Stereo Knobs VU Meters Screw, 6-32 x L/ 4 PhiL. Truss. Hd. Dress Plate Eseutcheon Escrrtcheon Screw Spindle Washers Ball Race Retaining Ring Washer . 255 I. D. x l/ 2 O.D. x .0I0 Thick Steel Pressure Roller Plate Assy. Motor Board Rear Escutcheon Pushbuttons Erase Head Pressure Pad Spring Record Head Pressure Pad Spring Pushbutton Assy. Bracket Pushbutton Spring Retaining Ring Washer, .255 I.D. x L/ 2 O.D. x .0I0 28 29 30 3r 32 33 34 35 36 37 38 39 40 4L 42 22 23 24 25 26 27 TR-r846 TG-476 TH-584 TB-2130 5133-r2 TB-2137 TB.1067 TG-461 TL-354-r TA-1560 TL-354 TS-r986 5133-r8 TB.2I52 TS-1984 TB-2028 Pressure Roller Washer Right Tape Guide Post Record-Play Head L/ 4 Truck Stereo Record Head Pressure Pad Bracket Screw, 6 x 3/ 8 Hex Sheet Metal Type Z Retaining Ring Erase Head Pad Bracket Pressure Roller Stop Plate Brkt. Erase Head - L/ 4 Track Left Tape Guide Post Stop Pushbutton Lever Record Switch Lever Pushbutton Lever Washer . 203 I. D. x 3/ 8 O. D. xI/32 Record Switch Spring Retaining Ring Erase Head Bracket Tape Guide Wire Pushbutton Latch Spring Record-Play Head Mtg. Brkt. MECHAN ICAL PARTS LIST ( CONT. 43 44 45 46 47 48 49 50 5l 52 53 54 55 56 57 58* 59 60 6r 62 63* 64 65 66 67 68 69 ?0 7L 72 73 74 75 76 77 ?8 79 80 BI 82 83 84 85 86 8? TC-1747 TR-i614 TA-1252 TS-2085 TA-u83 265 TB-2180 TF-324 TS-1993-r TA-II?4 TW-424* TS-2041 TA-1225 TA-1163 TS-r981 TR-1548* TB-1018 TA-1489 TW-454 5r33 -25 TS-I9BB TS-2086 TS-r9ll TA-1176-r TS-2244 TA-ll?3-l TB-r050 TA-?2 TR-16r5 TR-1615 5r33-25 TR-1416 5r33 -r2 TS-2245 TS-1990 TA-1i69 Counter Assy. Counter Drive Belt Flywheel Thrust Plate Assy. No. 6 Lo-ckwasher Screw, 6-32 x f/ 2 Phif. Bdg. Brake Cord Spring Countep.dnd Brake Pulley Assy Splndlg,Fulley for Drive BeIt Set Screw Motor Mounting Bracket Washer Flywheel Idler Wheel Spring Idler Arm Pivot Assy. Fiber Washer *Idler Wheel Takeup Compression Spring Idler Release Rod Assy. Idler Pulley Arm Assy. Wind Spring *Idler Drive BeIt Wind or Rewind Belt Idler PuJ.Iey Assy. Fiber Thrust Washer Retaining Ring Pause Linkage Spring Swivel Head Lifter ShaJt Idler Elevation Shajt Play Lever and Cam Assy. Pressure Roller Tension Spring Brake Arm Assy. Brake Cord Retainer Bracket Idler Arm Support Speed Change Assembly Push Rod Push Rod Washer Retaining Ring Switch Cam Roller Retaining Ring Cam Lever Spring Brake Spring Automatic Stop Actuator Washer, 6 x 3/ 8 xl/ 32 FL. Steel No. 6 Lockwasher Screw, 6-32 x 3/8 Phil. Bdg. Hd. Mach. B8 89 90 91 92 93 94 95 96 97 98 99 r00 t0l r02 103 104 r05 106 l0? 108 109 110 lil Il2 lr3 1r4 lr5 lr6 ll7 118 119 r20 TzL t22 123 124 t25 126 r27 TA-rU0-l TS-1993 5133 -12 TS-r980 5133 -18 TS-1981 TL-346 5133-25 TL-36I 5133 -25 TS-2r?0 TP-IOOB TA-125I TC-174r TA-1164 265 TL-36? TB-i093 Automatic. Shutoff Bracket Ass y Automatic Stop Spring Retaining Ring Speed Selector Lift Lever (Part of Item lll) Speed Selector Spring Retaining Ring Washer, .I92 I.D. x 3/8 O.D. x .010 Thick Fiber Washer Rewind Spring Washer, No. 6I.D. x7/LG Screw,6x3/8Hex. Sheet Metal Type Z Washer, .225 I.D. xL/ 2 O.D. x .010 Thick Wind Spring Link Fiber Washer Washer, . 225 I. D. x l/ 2 O.D. x .010 Thick Retaining Ring Solenoid Arm Lever Lockwasher Screw Steel Washer Retaining Ring Speed Selector Locking Plate Spacer Speed Selector Locking Plate Speed Selector Bracket Assy. Speed Selector Wheel Brake Pulley Spindle Pulley for Drive Belt Rewind Spring Link Motor Mounting Serew Lockwasher Flat Washer Motor Mounting Plate Grommet Spacer Washer Motor Motor Pulley Fan Set Screw Brake Cord,Dacron 24 Long * Idler Wheel-WALSCO Part No. l4?5 Idler Drive Belt-WALSCO Part No. 1410-06 Page I 2 - s FE OE 2 h A A -oZ o d c. oo o -oF 9< LO 3z CF Og .;< G g o tl t a A o .I 4 OF <d d LO frz o* ax F rl F H z F 4 iq ;oi EEx 3o G) t* r. ;zF .n u F o z