Pioneer-QX747A-rec-sm电路图 维修手册.pdf

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1、A-GFIANNE!- STHRHSRHCHgVER F ,fors)6osMnual $Jlpnffiruffiffite RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 8. ADJUSTMENTS *Do not attempt to adjust the CD-4 assembly or RM/SQ assembly. These adjustments require special test equipment, including a CD-4 signd generator, SQ

2、encoder and other apparatus. Required Measuring I nstruments o FM signal generator o MPX signal generator . AM signal generator o Millivolt meter o Distortion meter x-747A AM Section 1. Set the AM signal generator at 400H2 3O7o modulation. Connect the generator output to the AM antenna terminal thro

3、ugh a 1kO resistor. 2. Connect the oscilloscope and voltmeter in parallel to TAPE REC jack. 3. Set the signal generator output level at approxi- mately 30d8. Set signal generator and set dials to 600kHz. 4. Adjust cores of T7 (tuner assembly) and the bar antenna for peak output. 5. Set signal genera

4、tor and set dials to 1,400kH2. 6. Adjust TC5 and TC6 (tuner assembly) for peak output. 7. Repeat steps (3) through (6) several times to obtain opti,mum tracking. tr Dtrtrooo8o Tuner assembly A trstrucl Etrsoo oo TCs TC6 AM signal generator AC Oscilloscope voltmeter z- o /n n o V U/. _-, o CO E o t 3

5、. 5. 6. 4. FM Section 1. Set the FM signal generator at 400H2 IOVr modulation. Connect generator output to the FM antenna terminals through a 300S2 balanced dummy antenna. Connect the oscilloscope, voltmeter, and dis- tortion meter in parallel across TAPE REC jack. Set the signal generator output le

6、vel to 8 - L0dB. Set the signal generator and set dials to 90MHz. Adjust cores of T4 (tuner assembly) and T1, T2, and T3 to obtain peak output. Set signal generator and set dials to L06MHz. Adjust TC4 (tuner assembly) and TC1, TCz, and TCB to obtain peak output. 7. Repeat steps (3) through (6) sever

7、al times, to obtain optimum tracking. 8. Set the frequency to gOMHz and adjust the Tb core of the tuner assembly to obtain peak output. 9. Detune the set so that noise only is received. Adjust the primary (bottom) core of T6 so that the tuning meter pointer indicates the center position. 10. Set sig

8、nal generator and set dials to 98MHz. Set signal generator output level to 60dB. Carefully tune the set to this frequency as indicated by the tuning meter. 11. Adjust the secondary (top) core of T6 (tuner assembly) for minimum distortion. TC3 TC2 FM signal generator AC voltmeter 300st dummy D istort

9、ion meter trotrtroo8o trsoutr Etrooog oEr T3 6 T2 6 26 Oscilloscope FM MPX Section 1. Set FM signal generator at external modulation. Connect generator output to units FM antenna terminals via 300-ohm balanced dummy anten- na. Set FM SG output to 60dB. 2. Adjust MPX signal generator to obtain main s

10、ignal modulation of 1kHz, 67.lkHz frequency deviation. Connect to FM SGs external modu- lator terminals. Gl)(-747 A Connect the oscilloscope horizontal inputs to MPX SGs PILOT OUT terminals and Vertical inputs to No.18 terminal of tuner assembly. Tune unit and FM SG to 98MHz. Produce a Lissajous pat

11、tern on oscilloscope and adjust VR1 to make the pattern still. Then set signal generator for modulation of L (later R) and pilot. Adjust VR2 to obtain maximum channel separation. 3. 4. 5. 6. FM signal generator tr trotrtrtrE0 o rl Tuner assembly A ooonT otrtroo oo -l i) / ,A. r() v .-_r, 1, , I f-)

12、, -/ ! taT ,) r . oo MPX signal generator 27 Power Amplifier Section 1. Do not connect load to speaker terminals. Set VOLUME control at minimum. 2. Set power boosting switch to 4cH position. Then energize unit. 3. For the first approximately six seconds, the relay remains open, keeping the unit mute

13、d. confirm that all voltages are as indicated in the circuit diagram on page 88. 4. If voltages are greatly different from rated values, shut off power immediately. check suspicious areas, especially power supply circuit assembly. 5. If the relay opens immediately after the power amplifier has been

14、come into operation, a defect in the output transistors can be suspected. Check the output stage. Bottom View 6. After approx. 1020 minutes of warming-up time, adjust vR101 so that the voltage across terminals 58 and G3 of the power amplifier assembly becomes 20mV. 7. In the same way, adjust the fol

15、lowing variable resistors to obtain 20mV voltage readings across the following terminals: Terminals 49 - 55 VRI02 Terminals 40 - 46 Terminals 32 - 37 VR103 VRLO4 VR104 VR103 VR 102 8. Next, connect voltmeter between terminal 60 and ground. Adjust vR1 to obtain 0v reading. 9. In the same way, adjust

16、the following vRs to obtain zero readings at the following points: Terminal 52 and ground VR2 Terminal 43 and ground VRg Terminal 35 and ground VR4 Top View VR4 VR3 VR2 46(+) 49 (+) 63(+)VR 1O VR1 A B c D A c D Part 3 Fuse holder (with line voltage selector) AKR-027 NOTE: r, Parts indicad in green t

17、ype cannot be supplied. Speaker output terminal A,KE-O1O Antenna holder assembly AXB.OOl Switch cover assembly AEC- 1 1O CM3x8 T.3x 89 1Oil t2 t3 t4 5t4L3tzlI HA1335 9 ro il t2 t3t4t!t t6 ._ $+$#,r,) 5P p ryg 12.2 HEADPHONE JACK ASSEMBLY (AWX-054 Switch circuit assy No.10 54 (power boosting) Switch

18、circuit assy No.g 54 (Power boosting) Switch circuit assy No.5 Parts List of Headphone Jack Assembly (AWX-054) RESISTORS OTH ER SymbolDescription Part No. R1 R2 R3 R4 Metal oxide 150 2W Metal oxide 150 2W Metal oxide 150 2W Metal oxide 150 2W RS2P 151 K RS2P 151 K RS2P 151 K RS2P 151 K Glx-747A, Swi

19、tch circuit assy No.1 1 Relay Switch circuit assy No.12 Relay i- J t: i-i J l SymbolDescription Part No. Phone jack (FRONT) Phone jack (REAR) AKN-OO2 AKN.OO2 12.4 CONTROL AMPLIFIER ASSEMBLY (AWG-024l ar 2Sc1344 a 2Sc13+ Q. ?SCl344 t c-! C tn O Crr la 5. E Ltr ) O ( (D L.) c! O. : a) N (Y ) CO CO t u

20、rs aolr /L/Lr 0 c33 ) . I CY ) ta LO :? =O ()a 0 033 1.5V R3lf ,aJ + 1nt.( a L.LY VI. -T Crs 47175 23 150F 10.1 o -l- r., 1.8v) O ? 0 .a CY t C.J C-l Oa CO (_) O O ) (-( ti-) a N ar a ? - t j.3 v : e : C: +1? : C.) : I O CD (o (Y? - . (-) LO () VR za R t: 1t( /ii trr ) O C CO (n c! ct . ) (,o O o .Y

21、 u10 LJ) c.! -f a)i a) - (-l cl GI 0 at: ) t- =f 9 CY Q2 CroC,z IF 033 ) Lr) N a! (a: ) ra) I rY 0,03 3 ) =a N J. Y r) -ij =Ofta 0 I til P R+ 276. Cz -+ /Ca tfl 4.ll?_5 ) :P s cja - tt?: a. -l tr/ar L,L I LJ t/75 I l f a -l:l cta I L O O (-) Y (l o - CY Q6 ) O = + () (L, t= t3 I ) O (-) ca ll Cc +1?

22、 I Y a) C) CL (o t- 3 O G) (! ft1 VR zo GI cl O -gtIy-31:o- -1IT11 -i ) L 6) (j. For CH 1, CH 3 For CH2, CH4 -lF. Ca0033 o e-t- .-qXr-* Crr0033 VRr o o-ll- l0OK B x 2 Cro 0.033 o o-l ts -VVV-.-o Crz0033 VRr b qAAz=-o AnAr_o C 14 Rrs 15 K R18 5.6 K o-1AA- *-l t- li2o lOK 00018 + Cri *A- *gn qR 9 ,ffs

23、 P+nl , r-.ltlF ts+p+;+=+ o #2-; c t/6 czrat/af*)=l I I I t o ao oo fB oo oo 4lJslel 67 F. Ce0033 o o-F .-fXn - Crr0033 VRr o *l|- l00K B x 2 Cro 0.033 o e-1ts -h- Crz0033 VRr b ? o- Fo o iJ o Crroool8 ,T:?il;t *-il-.- .? i4;4j;-l VRzo ;L r?J?-l 6 rooKBxz !? tr I vf,u . -J VR4a (2) Power amp. Power

24、supply assy No.9 assy No.17 Gl)-7 47 A vR4d (2) amp. assy No.14 VR4c (2) s2-2l5R (6) vR4b (2) s2-215F (9) Power amp. assy No.1 1 Power amp. assy No.5 _- Parts List of Switch Circuit Assembly (RWS-097) CAPACITORS SymbolDescription Part No. c1 c2 c3 c4 c5 c6 c7 c8 Ceramic 39p 50V Ceramic 39p 50V Ceram

25、ic 39p 50V Ceramic 39p 50V Mylar O.O27 50V Mylar O.O27 50V Mylar O.O27 50V Mylar O.O27 50V CCDSL 39OK 50 ccDSL 390K 50 ccDsl 390K 50 ccDSL 390K 50 coMA 273K 50 coMA 273K 50 coMA 273K 50 coMA 273K 50 SWITCH ES SymbolDescription Part No. Push switch (SPEAKERS) Push switch (TAPE MONITOR, DOLBY NR ADP.,

26、 LOUDNESS, FM MUTING) Push switch (LEVEL tNDt- CATOR SENSITIVITY) ASG-078.A ASG.O79-A ASG-OBO-A RESISTORS Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon f ilm Carbon film Metal oxide Metal oxide Metal oxide Metal oxide Metal oxide Metal oxide Metal oxide Metal oxide C

27、arbon film Carbon film Carbon film Carbon film 68k 68k 68k 68k 33k 33k 33k 33k 150 2W 150 2W 150 2W 150 2W 75 1W 75 1W 75 1W 75 1W 12k %w 12k %W 12k %w 12k %w RD%PM 6B3J RD%PM 6B3J RD74PM 6B3J RD%PM 683J RD%PM 333J RD%PM 333J RD%PM 333J RD74PM 333J RS2P 151K RS2P 151K RS2P 151K RS2P 151K RSlP 75OK R

28、SlP 75OK RSlP 75OK RSlP 75OK RD%PS 123J RD%PS 123J RD%PS 123J RD%PS 123J R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R1B R19 R20 OTH E RS SymbolDescription Part No. 3p plug 4p plug 6p plug AKM-017-0 AKM-013-0 AKM-015-O SEMICONDUCTORS SymbolDescription Part No. D1 D2 D3 D4 D5 D6 D7 DB

29、D9 D10 Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode slB01-01 slB01-01 srB01-01 slB01-01 slB01-01 stB01-01 srB01-01 slB01-01 1S188FM-1 1S188FM-1 67 -I A B c D 2 A B c D z- O J LlJ (- F LU (t L- j O O 41 ) F O z. ?) I yLt 0z! YLt 6U yLt 8rE yL? uu (-, r t (l (t, : N oi d (.) () - d: .fi

30、#fu Y 9 I E )l r-l I (lil *( ! = cf- + c) 6 _v, di c! ,) c) () d v 168zu y9t eu a) (0 o v) o o o N r t+ 6I (/, O : 2 tl (? E- st t 2 = I o (Mt)t6 sct v 1,2 cc)- ,i lr,rl tO i.i :rl,r (I) .irii- . . . .1). (t7 d! 0t/0(,2 zz fcu ca, Cf) F ar) d, O ysg oct Y9lrz! al to sr (F) 3) ,:Ul (:GI y9t Lz! 9 a)

31、+ O f- .f O i,1,1: 2 I t: d) (0 (J v, N o O r: Is q) (! (J a ! o c rll iil:r:; r:r:il nt -lf *$: (ft o) (J C/, r o n, 9, d 0l/zz0tl 0LltL0e )AIIlJ Relay Power amp. assy No.43 Power amp. assy No.32 Power amp. assy No.37 Power amp. assy No.46 Power amp assy No.40 Power amp. assy No.49 Power amp. assy

32、No.55 Power amp. assy No.63 Power amp. assy No.58 Power supply assy No.6 Relay coil Relay coil Power amp, assY No.8 (o :3 *s. -fui- :+ 5.c r) d,r) $ r-rANL-_-o 3 S X L $*o-rwt-oo, sa,n n ., =-. Y;it*m- po-et-+ so. - BE*-+r-d-g* *+k- I -*-ex. -*-+ A- J;,. , O *-mA-+jE - $X r-AAlf % _ft,. t #iM- PB cD

33、 e-=ft- -, E s; =e_fu#azv :,o-t- e-Mr-M4l- Rro4? l/ lplv | ;ag o,6tlif,i Ao,*,u,* l( I iit, *, J .ritj, ,t,*u,Jl,r-:,ra t1 J f fi,13, -f$bi, ;vau -; lJ ll T,x1 Fr i-l 86 Parts List of Power Supply Circuit Assembly (AWR-086) CAPACITORS SymbolDescriptionPart No. c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11 c12

34、c13 c14 c15 c16 c17 c18 c19 c20 c21 c22 c23 c24 c25 Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Ce

35、ramic Ceramic Ceramic 0.01 150v 0.01 150v 0,01 150v 0.01 150v 0.01 150v 0.01 150v 0.01 150v 0.01 150v 2,200 63V 220 35V 100 16V 100 35V 100 35V 220 50V 220 50V 220 16V 220 63V 100 63V 100 16V 100 50v 330 10V 330 10V 150p 50V 150p 50V 150p 50V ACG-004 ACG-004 ACG-OO4 ACG-004 ACG-004 ACG-004 ACG-004 A

36、CG-004 cEB 222P 63 cEA 221P 35 cEA 101P 16 cEA 101P 35 cEA 101P 35 cEA 221P 50 CEA 221P 50 cEA 221P 16 cEA 221P 63 cEA 101P 63 CEA 101P 16 cEA 101P 50 cEA 331P 10 cEA 331P 10 ccDSL 1512 CCDSL 1512 ccDSL 1512 50 50 50 SEMICONDUCTORS SymbolDescriptionPart No. o1 02 o3 04 o5 o6 D1 D2 D3 D4 D5 D6 D7 DB

37、DZ1 D22 Transistor 2SD525-O or Y Transistor 2SC1318A-Oor Transistor 2SC945-O or R Transistor 2SD313-D or E Transistor 2SB507P-D or E Transistor 2SA720A-O or R Diode Diode Diode Diode Diode Diode Diode Diode SS3R SS3R SS3 ss3 slB01-02 (1S1886) stB01-02 ( 1 S1 886) srB01-02 ( 1 S1 886) s lB01-01 (1S18

38、85) Zener diode WZ-140 Zener diode WZ-130 OTHERS SymbolDescriptionPart No. Heat sink Heat sink Fuse clip ANH-263 ANH-1 17 AKR.O13 RESISTORS SymbolDescriptionPart No. R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 Rl7 Carbon f ilm 15k Carbon film 2.2 Carbon f ilm 5.1 k Carbon film 2.7k Carbon

39、 film 9.1k Carbon film 8.2k Carbon film 18 %W Metal oxide 47 1W Carbon film 5.6k Carbon film 4.7k Metal oxide 1k Carbon film 12k Carbon film 5.6k Carbon f ilm 5.1 Carbon film 27 Carbon film 82 Wire wound 150 2W 5W RD74PM 153J RD%PM 2R2J RD74PM 512J RD%PM 272J RD/aPM 912J RD%PM 822J RD%PS 18OJ RSlP 4

40、7OK RD%PM 562J RD%PM 472J RS2P 1O2K RDI/4PM 123J RD%PM 562J RD74PM 5R1J RDY4PM 27OJ RDZaPM 820J RTSB 151K 87 3 3 A B c D A B c D 1210 PoWER AMPLIFIER ASSEMBLY (AwH.O2s) -l I I t- taso-sst -l | =utol I +30 v IO t? 64 vcc 5s 91 h Qr: 2SCr45l Q ros 25D3t0 t -t s) oF v, v2= ct :, Lf) 11612 2 ru Ft JsdHs

41、s 0.46v5 N2 o) OO - d Rrg 3 Rr B2K -2,1V s EF ; t() I- -T. r,3258530 l 5l YCC 56 Qroe 25852l olo I n;on#uu c70.41125 3-= GOC! nu $u, ou-r2 L_ioo Qlro 25D3?1 I Y (o Lr) r t I rl 147 c3 04?/2s -= oZdrr, lv c-.-a :Lt 72 ) 1 O) cri o_ C) (! c =O tr-1 O u) I Fl O q r- $ 9 L.) Y c-t C! J 25Bs2? o- C! O CD

42、 R+ 5.6 lW 18 E 15 lN+ ffi 11 R115 5 6 1w 00K xl )1 IBK Q,2 25Cg69 D+ 132413 o N (_) O :NN I Rz+ I -l Lr+ 2 . :D I e32 J1 c041l25 ) 9 u) : F a.4.i l?5 = _s o = ty- I I I I I I I I I I I I I 59 O ln t- a (r Y c. N E d : cJ c! 9 d: O Lr) E- $ 9 (_) Dl152413 c21 330/10 =. L/) Lt) O: CI: 105 25852l Rllo

43、 5 6 1W Qe zSC859 -LOO , icD ro_ OO o= Rrrr 5 6 l$l = _ O I I ca R 30 2 2K | Z ,V Rs4 39K 03 2SA126 if a* 25 A126 IO l Ica 1.ca LO l- 7 C I.r) ct I (Y O O G: o_ O .1 G J Y I (t ( O oi ORrze4J 1$l QmrzsD35? Rrrz 5 6 W R62 4l K R66 E2 K . . l +., Rss 4l K Rsr 82K lger r Iot O lr) (-) .) - (_.) ll tl s

44、o sB -co O_ :tt , . :,t l:, ,: i:lrrl:l:rl : 6o_ 9O 1.2V L) 25D35T Rrzs 4 ? ,lW A6 25A126 Rss 39x C1 R rr ,0.+1 125 = - O :2 1 t :Rit:r:r:r$4$itft ?2K c23 330110 8A PIONEEFI ELECTFIONIC COFIPOFIATION 4-1 , Meguno1 -Chome, Meguno-ku, Tokyo 153, Japan U.S. PIONEEFI ELECTFIONICS C(fFIF(fFIATION 75 Oxfond Dnive, Moonachie, New Jersey O7O74, U.S.A. PIONEEFI ELECTFIONIC (EUFIOFE N.V. Luithagensteenweg no. 9, 2O3O Antwenp, Belgium PIONEEFI ELECTFIONICS AUSTFIALIA PTY. LTD. 17A-1A4 Boundany Road, Bnaeslde, Victonia 3195, Austnalia o AUG, 1975Printed in Japan