Pioneer-CTF615-tape-sm 电路图 维修手册.pdf

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1、Eefvicecfllanual CASSETTE TAPE DECK cT-FEi15 t ()rqoruEr RadioFans.CN 收音机爱 好者资料库 d GT.FCi,| 5 8.3 TAPE SPEED ADJUSTMENT 1. Connect a frequency counter to the output terminals. 2. Playbaek the SkHz portion of the STD-801 test tape. At the beginning, the frequency should lie within the 2gg5 to B010Hz

2、range, and may be adjusted by turning the semi-fixed resistor located in the capstan motor adjustment hole (using a suitable size screw-driver). (See Fig.8-2). 3. Tape speed is increased by turning the resistor clockwise, and decreased by turning counter clockwise. Fig. 8-2 Tape Speed Adjustment 8.4

3、 PLAY SOLENOID ADJUSTMENT 1. Put the deck into playback mode. 2. Loosen screws O and adjust the mounting position of the play solenoid so that the square hole of the head chassis assy fits flush against the shaft bearing holder (i.e. 0 separation), as shown in Fig.8-3. Play lever Shaft holder bearin

4、g ft ff 1 9 8. M ECHANICAL ADJUSTMENTS 8.1 PINCH ROLLER PRESSURE ADJUSTMENT 1. Put the deck into playback mode. 2. Gently push against the pinch roller arm with a tension gauge (spring balance of approximately 5009 full scale) and separate the pinch roller slightly from the capstan. 3. Then ease the

5、 pinch roller back onto the cap- stan, and read off the value when the pinch roller starts to rotate. If the reading fails to lie within 24O to Bb0g, replace the pinch roller pressiie spring 1 nnH-OSf j. ,n Pinch roller Fig.8-1 Pinch Roller pressure Adjustment 8.2 REEL BASE TOROUE ADJUSTMENT Prior t

6、o Adjusting Wipe both reel bases, the capstan shaft and the pineh roller with Daiflon dipped in a little an_ hydrous alcohol. Adjustment Measure the torque with a torque meter during playback, fast forward and rewind modes. The measured values should normally lie within the allowable ranges listed i

7、n the following table. If the measured values lie outside the relevant ranges, replace the take-up reel base assy (RXB-2?2) and/or the drive arm assy (RXB-2?4). Take-up reel base Supply reel base Playback mode35-559.cm *2-69cm F.F mode7O-L20g. cm *2-69cm REW mode *2-69cm 70-120gcm * denotesback tens

8、ion torque Head chassis Play solenoid assy Fig.8-3 Play Solenoid Adjustment RadioFans.CN 收音机爱 好者资料库 8.5 F.F SOLENOID ADJUSTMENT 1. Put the deck into fast forward mode. 2. Loosen screws o and adjust the fast forward solenoid mounting position so that the square hole of thb reel base assy is flush aga

9、inst the boss of the drive arm assy (i.e. 0 separation) as shown in Fig.8-4. 8.6 REW SOLENOID ADJUSTMENT 1. Put the deck into rewind mode. 2. Loosen screws o uttd adjust the rewind solenoid mounting.losition so that the boss of the drive ann assy-fits flush against the square hole of the reel base a

10、ssy (i.e. 0 separation) as shown in !ig.8-4. 8.7 REC SOLENOID ADJUSTMENT 1. Put the deck into recording mode. 2. Loosen screws O and adjust the recording solenoid mounting position so that the record- ing spring is stretched by 0.5 to 1mm as shown in Feg.8-5. Driving gear Steel base assY gJ assy S r

11、eel base assy eo Slids 1nr*l D Fig. 8-5 Recording Solenoid Adjustment Rewind solenoid ldler gpar S reel base assY Fig.8-4 Fast Forward and Rewind solenoid Adiustment solenoid RadioFans.CN 收音机爱 好者资料库 l t t l T l I o* $r, # 9. ELECTRICAL ADJUSTMENS Before Starting Any Electrical Adjustments, First Che

12、ck Through the Following List of Preparatory ltems. 1. Electrical adjustments should only be com- menced after all mechanical adjustments have been completed. 2. Levels during measurements are based on OdBv = 1V. Connect a 50kO (47 - 52kO ) dummy resistor !o the OUTPUT terminals. 3. Designated test

13、tapes must be used for all relefant adjustments. Although both side A and B of the test tapes have been prepared, it is recommended that only side A (the side with the label) be used. STD-331A: general purpose during playback mode. STD-341A: adjustments during playback mode. STD-601: STD blank tape.

14、 STD-603: CrOz blank tape. STD-604: METAL blank tape. SONY DUAD C-60: Fe-Cr blank tape 4. Prepare the following measuring apparatus. t AC ,*rnillivoltmeter, low frequency oscillator, aftenuator, oscilloscope. 5. Unless otherwise specified, all adjustments are for both left and right channels. 6. Cle

15、an and demagnify the head. 7. Leave the DOLBY NR switch off unless di- rected otherwise. 8. Let the deck warrn up (aging) for a few minutes before proceeding with the adjustments. Before starting the recording and playback frequency response adjustments, wait for about 3 to 5 minutes. CT-F61 5 9. Pr

16、oceed with each adjustment in the specified order. Altering the order can hinder proper adjustment, resulting in loss of performance. Adjustment Order 1. Head azimuth adjustment 2. Playback equalizer check 3. Playback level adjustment 4. F.L. meter adjustment 5. hecording rough adjustment 6. Erasure

17、 current adjustment 7. Bias trap adjustment 8. Recording bias rough adjustment 9. Recording/playback frequency response adjust ment/check 10. Recording level adjustment LEvL (d8l t o 1-l _ zo srrx, | - I rorx lrru le.rrn I ;.; ;-#; ( / o -20 LEVEL ( dB) 333Hr 333Ht | 4tft2 SrxJI orllrE rHt6.5rn SOrr

18、c 3Otc tOrrc lOrc 6olc lOrrc 3Orrc Fig. 9-2 Test tape STD-331A I, 9.1 HEAD AZIMUTH ADJUSTMENT 1. Connect the AC millivoltmeter to the OUTPUT terminals. 9.2 PLAYBACK EOUALIZER CHECK 1. Again connect the AC millivoltmeter to the OUTPUT terminals, and set the TAPE switch : 2, Tum up the OUTPLf level co

19、ntrol to maximum to STD , oosition. and set the TApE switch to the STD 2. Play tlle 333H2 -20dB) and 6.3kHz portions 1 position. Then turn vR101 (Lch) and vR201 of the sTD-341A test tape, and check that i iUn) up to maximum positions. the difference in output level between the two i a. Phy the 10kHz

20、/- 20dB portion of the srD- . it- *95 I LdB:- . - I 331A test tape, and turn the head azimrrttr ; 3. Next set th_e TAP! switch to the Fe-cr position I ;ffiriJ;l ;* so as to obtain maximum (or the Croz or METAL Position) and repeat ,l itpt i*rr- both left and right channels. step 2. In this case, the

21、 6.3kHz output should (e +. lii!ii-pit-g this adjust, loJk the screw differ from ttre 333H2 output level bv -35 1- with screw lock. t 1dB t, I I le1 t t n :f|l|t ?rys,?t5-4 - t a 9.3 PLAYBACK LEVEL ADJUSTMENT l.ConnecttheAcmillivoltmetertoTPS(Lch) and TP4 (Rch) of the mother assy (The OUTPUT level c

22、ontrol may be set to any po- sition). 2.P|aythe333Hz/0dBportionoftheSTD.S41A test tape, ffid adjust VR101(Lch) and VR201 (Rch)sothattheACmillivoltmeterreadsldBv (1.1V). :. 9.4 F.L METER ADJUSTMENT 1.Applya333Hz/-10dBv(316mV)signaltothe INPUT terminats with the deck in recording mode. 2. Connect the

23、AC millivoltmeter to TPl(Lch) and TP3(Rch) of the mother ossV, and adjust the INPUT level control to obtain a millivolt meter reading of - 23dBv (70mV) B. Onee the a6ove settings have been completed turnvR304(mothera.ssy)counterclockwise to the point where the - 20dB segment of :theF.Lmetergoesout(i

24、.e.attheveryinstant). 4. Then adjust the INPUT level control to obtain a mlllivoltmeter reading of - ggeY -(700mV) and adjust VR501(Lch) and VR502(Rch) on the F.L meter assy so that the FL meter readsOdB(turnVR50.andVR502around clockwise and stop at the point where the .OdB segment lights uP). 5. Wh

25、ile turning the INPUT level control up gradu- allyfromminimumposition,cheekthatthe Acmillivoltmetergivesthefollowingreading at the corresponding F.L meter positions F.L Meter Reading AC mV Meter Reading -20dB-23x I anu (56mv-1tr1! +5dB +2t2dBv (1V-1.58V) Note: If the sssiue ranges are not satisfied

26、repeat steps 3 and 4 seueral times to readiust 9.5 RECORDING ROUGH ADJUSTMENT 1. Apply 333H2/-10dBv (316mV) sigrral to the INPUT terminaL with the deck in recording mode. (Since the bias oscillator becomes operable during recording mode, short circuit the base of Q304 to groundi 2. Connect th; AC mi

27、livoltrneter to TPl (Lchl and TP2 (Rch) of the mother ?ssV, and adju:t the INPUT level control so that the millivolt- meter reads -3dBv (700mV). 3. Then set the TAPE switch to the sTD position and connect the Ac millivoltmeter to terminals no.69 and no.?0 (and then no78 and no?9) on the mother assY.

28、 4. Adjust VR103 (Lch) and VR203 (Rch) so tnal the millivoltmeter reads 034mV (3 pA) 9.6 ERASURE CURRENT ADJUSTMENT 1. Adjust VR303 on thermother assy to the meihanical center positibn, and put the deck into recording mode. 2.TurntheINPUTlevelcontroldowntomini. mumposition(butwithoutshortcircuitingt

29、he base of Q304 to ground). 3. Next set the tApn switch to the METAL position, and connect the Ac millivoltmeter io terminals no.41 and no.37 (ground) on the mother assy. Adjust VR803 until the millivoltmeter reads 180mV (180mA) 9.7 BIAS TRAP ADJUSTMENT l.Putthedeckintorecordingmode,andturn the INPU

30、T level control down to minimum position. z.wittrtheTAPEswitchstillintheMETAL position, connect the Ac millivoltmeter. to tpg (Lch) and TP4 (Rch) on the mother assy Adjust LLO? (Lch) and L202 (Rch) to obtain minimum millivoltmeter reading 9.8 RECORDING BIAS ROUGH ADJUSTMENT l.Putthedeckintorecording

31、modeandturnthe INPUT level control down to minimum po sition. 2. Set the TAPE switch to the sTD position, and connect the AC millivoltmeter to the mother assy terminals no.?l and no72 (and then ,ro.?6 and no.?)- Adjust VR301 (Lch) and vR302(Rch)toobtainamillivoltmeterreading of 3.4mV (3a0rA). 9.9 RE

32、CORDING/PLAYBACK FREOUENCY RESPONSE CHECK ATD ADJUSTMENT 1. Connect the Ac millilr).Lllltr to the OUTPUT rerminals. s.! ti:e TAPE s*-itch to STD and :urn the DOLtsl )iR. sw:cir cff 2.Applya3iiii!-r,3.hl8t.31drnV)signaltothe ISp,g:f !.*isrirl*.r, *4 adjust the INPUT level ;unuu tv r.ri,i.t-ll c r-rll

33、ivcltmeter reading of i 3f*lltr n l nr:i f . 3. flltcurc! *.nd ifrrno pu oack the 333H2 and 6.3klla $.Sn rj In uht STH01 test tape and I adjust VneOl (Lch, and VR302 (Rch) to obtainadifferenceinoutputlevelof+0.5dB. e2 a 4. Also record and playback the LZkHz signal, and check that the results satisfy

34、 the specifi- cations. If it becomes necessary to readjust VR301 and VR302 due to the specifications not being satisfied, or after checking the fre- quency response of other tapes (CrOz , METAL, Fe-Cr), adjust these 2 VRs so as.!o obtain a playback output difference of 0l6.u dB with the 6.3kHz signa

35、l. 5. Next set the TAPE switch to the Fe-Cr, CrOz , and METAL positions in tum, and record and play back the prescribed frequencies in the Duad -&60, STD-603 and STD-604 test tapes respectively, checking that the specified ratings are satisfied in each case. 9.10 RECORDING LEVEL ADJUSTMENT 1. Connec

36、t the AC millivoltmeter to TP1 (Lch) and TP2 (Rch) on the mother assy. 2. Set the TAPE switch to the STD position, ild turn the DOLBY NR switch off. Then apply a 333H2/-10dBv (316mV) signal to the INPUT terminals. GT-F61 5 3. Adjust the INPUT level control to obtain a millivoltmeter reading of -BdBv

37、 (700mV). 4. Next turn the DOLBY NR switch or, and record the 333flJ, signal onto the STD-601 test tape. 5. Play back the signal and adjust VR103(Lch) and VR203 (Rch) so that the millivoltmeter reads -3dBv (700mV). 6. Then switch the TAPE switch to the CrOz position and turn the DOLBY NR switch on.

38、Record the g$Hzl-10dBv (316mV) signal onto the STD-603 test tape, ild then while playing it back check that a millivoltmeter reading of -BdBv (700mV) t1.5dB is obtained. 7. Finally set the TAPE switch to the METAL position and record the same signal used in step 6 above onto the STD-604 test tape. P

39、lay this signal back in the same way again, and check that a millivoltmeter reading of -3dBv (700mV) t1.5dB is obtained in this case also. Rear Panel _Jl : Mother Assembly VRI REC/P.B switch vnoot 78 79 R20 Lt02 TPl 0 0 L20r0 VR2O2 go TP2 L201 L203 q VR3O2 VRSOI 6e0 lzoor-tor VRI02 Lt03 Y*B Fig. 9-3 Adjustment Points