Tandberg-TPT-3001-Service-Manual-2电路原理图.pdf

TANDBERG ProgramableFM Tuner 3001 Circuit DiagraTs and Alignment Instructions TANDBERG- The European Alternative RadioFans.CN 收音机爱 好者资料库 Contents Page Mechanical service 3 Electrical service 6 i Main circuit diagram 7 I Power supply and dial pointer adjustments . . . 8 Oscillatorandfrontend. . 10 Limiter/DetectorbelowserialNo.00T00 . 12 Limiter/DetectoraboveserialNo.00T00 . 14 Selectivity below serial No. 00700 . . . . 16 Selectivity above serial No. 00700 . . . 18 Signaimeter,mutinglevel .20 Tuningsystem 1. .2+ Tuningsystem2. .26 Stereodecoder .28 Integratedcircuits .,.32 OtherPCboards .34 Modifications. .35 Technicaldata. .36 E RadioFans.CN 收音机爱 好者资料库 1.0 Mechanical service 1.1 Dismantling O Top cover, rear (1). O Top cover, front (2). O Rear panel (3). Figure 1 Dismantling the rear and top coaers O Front panel (4). Remove rotary knobs. O Bottom cover (5). I t, -l i lFisure 2 t- i I N Dismantling the front and bottom couers ET 1.2Dial cord drive Figure 3 Dial cord driue 1.3 Replacing battery in the tuning memory circuit The memorY is Powered bY an intemal batterY so that the storeo data is not losi when the receiver is switched off. The batterv is the NiCd tYPe, 14 V, and is chaised continuouslY when the receivei is switched off Under normal conditions the battery will have a life of 10 Years A I 1/ t il I Figure 4 The tuning circuit battery Ordering No 376731 t 1.4Mounting side panels and the 19-rack mount kit Figure 5 Mounting the side panels (extra) NOTE! When fitting extra side panels you must use the long screws (A) which are supplied. Take care of the short screws (B) originally used to hold the side panels because you will need them if you remove the extra side panels. The long screws must not be used without the extra side panels because they will cause damage inside the receiver. (25 mm) -r*f-i S $r Snril(J I I I B (16 mm) :=- ,.,t Figure 6 Mounting the 19-rach ,nount hit (extra) H 2.0 Electrical service Tandberg Programable Tuner TPT 3001 is a professional tuner. Some of its specifications are difficult to measure with standard test equipment and consequently the most critical circuits will need an utmost accurate alignment demanding high quality test equipment. In case of malfunction we will therefore advise you: NEVER TOUCH trimming components unless you know for sure they need adjustment. For alignment of distortion and channel separation the generators own distortion figure should be lower than 1/5 of the TPT 3001 distortion figures and the channel separation of the equipment should be 14 to 20 dB higher than that of the TPT 3001. For a complete alignment we recommend you to follow the procedure in the same order as described in this book: - a For further information, contact our representative. 3 ChapterProcedurePage I I . 2. J . 4. 5. 6. 7. 8. 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.tr Power supply and dial pointer Oscillator and front end Limiter/detector below serial No. 00700 Limiter/detector above serial No. 00700 Selectivity below serial No. 00700 Selectivity above serial No. 00700 Signal meter and Muting level Tuning system 1 Tuning system 2 Stereo decoder 8 10 T2 T4 16 18 20 24 26 30 2.1Main circuit diagram with connections. Printed circuit boards and adjustment, see pages 20 through 23 ,I L - -1.11- - - - - -rlTr- -.1 cl:l:l:r l:l: l:l: t- - - - - - - - -,;fi-YY_- - - - - - I r I FRONT-END I I ld +. 1 _J r- - - - - al-J,;i - - - -l I lt,i lr t, :i- I I I I I I I I I I I t. +: .i- lir tft 1., L,:I E l-j,* + Ei 5 J, L I r,:li E;ioi-,n1 i - # + + i= I+- 1 t-t TUNING SYSTEM I ruNtN6 sYslEM 2 EIEIE T l ! tror atool trt trsr Pr00! Pr0o6 klllllh rll1t rlllllb rl1lt r111111111h r1-11t- - J 4:f Flr4:Flr4:l:l:l:lrrl:l:l:lr4:l:l:l:l:fl :l:ll:rl:ll:l: rrH-I-tr-prI;Hilr I rdr J r, , rool , roo. J rooa Jr00a el lt 7t.l rl.l 1 rl rl rl.l ?l 61 5l .l ! 2l l l:|l.t:|lt:|lLJt l l |l t:| rL Prrrl _ J r t- F:r a | rFt f I L L - - - iYg =g - - - - - - - - - - J l- -l .: 1,., LIMITER i DETEcToR i =F i | .1li- -d111-rL-.jl r- - lAll t_ _ f -l I OEgOOER ,otl I i+r t;= | ,7t, P7r1 Pr. I+ t-rl111 lt-d1 1111u1-1-i.h- - - - - -J cl:l:l:l:l:l: cl:l:l:l:ll: cl:l:l:lr c E . t t 6 ; - 3 i i ! f f : r I L ridiil-.l r-qlll,llJlt I tuNtio SYstEx 2 iil lii iil ii.l I t : l I t_A iitil JLI -J;,-l t-r Figure 7 Main circuit diagram Power supply and dial pointer adjustments = e =- 3= z I lr -l tl ilr llr l-l-.r. -i t t EROWN L_-1 -l I I f- _fii I L-JL_J ET J c 808 100 n -1F 2 R - - | t-t-l-l-l-l-1.- - - -1 r8o2 -rl zlllzl3ltltl 8l- | o 805 BO 239 B l cR 808 6V 8 c 8 17 100 n -l o 8 1 1 BD 239 l1?v ?B c R 8 1 2 6 V 8 reor f c 810 2 2 l J I 2 o 804 BC 5(7 B c 809 2 2 t *TJ rr.rv Bo,!e o 814 BC 557 B o 8 1 0 BC 547 B c 8 1 8 a + / a + $ Figure B Power suPPtY o-t YELLow GRErf 6REEN Ffr A-* t I l9 19 L le8rs JJ t 7. i t . i tr- -=-* *,f,!#i, T T J ffiI,ffi-il I l-g1.-.< .-rLsit | | IHI *es .-rrgs -5.C- ild |+l T t .,0*e*1-1l-l flt n sJ, t, rffii llll lll I J +-T lt ,SlllllJt lL J 1,1 iLF TlelElElE rffi . f-+#-* ,r,*.,#.r.# j:ffiry qHI ffi1 ?,*Si lll* *#$ I$S$+$F *;,. ;tt ?ffi JIT ;:pF ffi,rt#,., FFb 1? 1r?ttil *.,0 *,t HF,F.B FhBF, J-sii1l11I ,1-1.4 li i.l. rsl ir!. f l, i 1 ,1, l, k,; T 8 r -J301 Power supply board, foil side aaaate il | I L- tO807 I - lu! ll; iloero ll,TT U- 5(IS ll j!1+ , :801 ,nn- I9r- , uttlnilttrf, E,F,F #stdtf* *_ lln-Lf- l-,fl - H! ril -fu LJ ,=TC, F,*- tililffirN i i ; ;rf 3 R8r s c8t5 + / / c R o o g / tG / I_l ilr- neor I t( lt t; !Ji-11 J I p 3 L-*J c8l2 s i-:Hi6 L-J -e ;H c802 0 LLIJ-LI -*fiHHHllr $rt*# Figure 10 Power supply board, component side Pl: P2: P3: P4: P5: P6: Power Check operating voltages at connectorJS0l: 5 v (5.2 v) 5 v (5.2 v) 15.0 V, adjust with R823 40v 25.0 V , adjust with R8 1 1 ground terminal. Dial pointer (varicap-voltages) O Connect voltmeter to J705 (main board, see figure 1 1 ). Figure 11 Dial pointer adjustment O Tum the Tuning knob until the tuning pot.meter is in its physical extreme posilion with the dial pointer at the low frequency end of the dial. O Adjust R784 for 3.0 V on the voltmeter. O Tum the Tuning knob for 4.0 V on the volt- meter. The pointer should then be at the 90 MHz mark on the dial. If necessary, adjust the pointer position. wirh Rt311 O with R823 3 R784-g E I F e g o o CL = o O N ! HF R l 2 l ua NJ H j r i s a G E 0.68 ! H P9frst Fll|fr !IeJ f-+ L r 0 4 I r o Q m o / r-1-f cil2 | tsc I l n q O N -. s R lt lFl C l l / , 3 . 5 - l 5 p C l 1 3 l 2 P R 128 o T . c 12 9 r 1 , 3 - l 5 p tr l l I I r1 ! C 1 3 3 - r r 1 . 3 - 1 5 P :-:l s H o Hts Hffi c R l 0 2 L l 0 2 zxei IPH ff62 o N i #lF4e FIl A A t c l 9 t10I 2 3.5V c 1 2 0 q 103 BF 245 C c 1 4 0 l n c 1 1 8 - I TT t l c 149 l, nl c r 4 6 1 o p A ; ! L l 1 2 l f H -f -T- l s l a l o l c l 4 5 l n At t C l l 2 5 6 p N 1 5 0 0 + 1 2 P N P 0 C 1 l 3 1 2 p N P 0 C l 1 5 l 2 p N 1 5 0 C l 1 6 2 2 p N P o C l l E 6 p 8 N 7 5 0 C l 2 0 l p 5 P l 0 0 L r 0 r , L r 0 ? , L l l 0 , M c 1 1 0 L 1 0 8 , L r 0 9 , L I I l , 3 0 1 s N - 0 3 0 0 L 1 0 5 , 3 0 1 AN - 0 4 0 0 L , 1 0 6 , 3 0 1 AN - 0 3 0 0 RESISTORS MARKED WITH A DOT ARE MET. FILM I/. c R 1 0 8 C R l 0 9 BB 204 BB 204 RED RED - .*# lcnotJ* n q$*H$ mllh; ql *tt, db?r , cr07 -.-ll-. etl +s J cr09 *,tts cl08 .-lP r l-jl tl .l ,rl.l J rO2 *-$,ffi* F+ +.ro,i; *ffF rrf52 . r-;=.+ ldlHr* ffffig StaL1:r- +FFFffiM ,J,.,r.G .tEH+6 TEf I Ho J5? cl28.t- -, / Figure 13 Front end board, foil side a, ; ; HA: ll s ll sf+ rrr=n=,.,;i ll #sn.,. ll :XWil,il ii=fl$ii.n?EEf!l liliii ir,t il;i :r. ):,llii G-iiUO-T5tT#:ii= t* ,-. n ffililrll nllffirqfttll$ruil QHdilfill ftll,ft H!l-ljill A,; T5 r T-:iil ft _ : _! ; ;,;_1,._t ,-,ell .:l_:i j_lL_s-l_-_j !:.*, .,:_ f-.* -tj- .* =- 1;-Er< -rr-iil5;- -1:-lF*-+#ii =;*1,#: ll T.n.ll -il nQ,L -l,ii- tL.Hi An rF,* 1 a(m;i ilg t, #,un A A A - - -1iim$ il,-F*il ii -il;rt-AJi; ;vTi: ,!.ililililI1 !H, .?, .,r1 tt n.l;it*ii -#!il$ Figure 14 Front end board, component side Oscillator O Conne ct signal generator to the antenna terminal, 0.5 mV/75 ohms, t 75 kHz dev. O Connect oscilloscope (a.c.-mode) to the FM-Multipath Vert. output at the rear of the tuner. O Set the Bandwidth selector to Narrow. O 90 MI2, adjust Li05. 105 MIJz, adjust Cl14. The cover must be on the Front End box during the oscillator adjustment. O The center frequency is indicated by a symme- trical sinewave on the oscilloscope (figure 15). Figure 15 Symmetrical sinewaue Front End O Connect signal generator to the antenna terminal, 0.5 mVi 75 ohms, t 75 kHz dev. O Connect oscilloscope (d.c.-mode) to the FM-Multipath Vert. output. O Adjust to max. d.c. level on the oscilloscope. During the adjustment the curve will go to a maximum, then very slowly sink again. Adjust until no further maximum is obtainable. 90 MHz: L101, L107, L108, L109, Ll10, Ll11, Ll06 (osc. amplitude). 105 MHz: C102, C129, Cl33, C134, CI43, CI44, C124 (osc. amplitude). To obtain a symmetrical curve, make a final adjustment with Ll05 (90 MHz) and Cl14 (105 MHz) in the oscillator circuit. 2.4Limiter/Detector below serial No. 00700 L 3 0 4 l 0 p H L 3 0 1 r - - -l l l c 303 22p2 2 p L - - - - - - - J c 302 22n Figure 16 Limiterldetector belou serial No. 00700 L 305 l0y H cR 309/ 310 2 x l N 4 l 4 8 o 0 (J - o 6 J <i o o J F I o < o O o 302 BF I99 N II I C l r A f 22n 4 c3r5 a z n c 320 27n Il* c 3 l 8 22 FROM J 202 FT ( J l -T- 6 l ( J l -;T o l 3l ;T o l 3I -T ;l ( J l c 3 l 3c3r6 100 n I 22y T I 22p v S z l 2 t i c322 22nI N ( 2 uJ v F a g tl- o 301 BF I99 cR 304 A A I I 9 N I o a o o c l -I ST 3I F (9 z. t! F v) o UJ L E t t 68p P 7 1 1 ( 4 ) RESISTORS MARKED WIIH A OOT ARE MET. FILM Il. CAPACITORS MARKEO WIIH A OOT ARE LOW NOISE/LEAKAGE c32s I -Jl-+ 330 p q l s ;l : | N O K Z b J -1 L 308 I L T I n c 325 22n cR 307 MBO 201 L 309 -l I r I T .t 3.5 V q 30/. BC 549 C r t l I ;T o l o l -T- l o l o l r l l_r_ oT- N I o l i AFC REF. IN l q-?crrz ?f 3.n. -,0u1 1 HI.:1,. / pucl 19 .Fricrtr 3?0,_+ | *i o 11.tr al.i ltE rafss!-*= rT , l3ll u30r I la ? Srrr-erfir I .lt-l ?co . c32r T+ + e caB Tgo (r_mr t .lr! c 310 r +, ll o,J lHl r ,R.f THI Ti J j HH .l r? I A f-t l- | tptl9 R w d frr o l :l l9 r t+l L- a ll.* ?fr r? o l T pa. -/t. ffi o3o4 ?l IHqffi$ i *-lri Y 1rr;Ail llli : | | .P il ll l-l ltlt? i ttlt;:l:I d5 U Tot?,.r3$ q3o6 | = _cR3o6t N ! | t o I | | - rl r1?,h - - UU Uttv1-1U s, : l : 3 l t l _ . r / o o o : o o r r C g U J V A E E Figure 17 Limiterldetector board below serial Io. 00700, foil side Figure 18 Limiterldetector board below serial No. 00700, component side -l * ,; ITI ?l I L I I I illHl. I J E,J? I t= | I af*rl 02 I I I tl .t I ._l _l ;,til | :!as I ol ilql ) L im iter/Detector, d.c.-reference and d istortion O Connect oscilloscope (d.c.-mode) to the Fl-Multipath Vert. terminal. O Pull out signal plug P201 on the selectivity box (see figure l9). O Connect signal generator to J201 (see figure 19). Figure 19 Test points O Tune the generator to approx. 10.7 MHz, 500 pV modulated mono t 75 kHz dev., 1 kHz modulation. O Set Bandwidth selector to Narrow. O Fine-tune the generator for symmetrical sinewave on the oscilloscope (figure 20). The frequency thus found is now used for the further adjustments. Figure 20 Symmetrical sinewaue O Switch off the modulation and set the generator output to 20 mV. O Set Bandwidth selector to Wide. O Pull out interconnector board No. 45430 (see figure 21). O Connect a d.c. millivoltmeter (range 100 mV) to P71 l, pin 4 (strap next to R786 on the main board, see figure 21). O Shortcircuit the strap to ground for a second. Figure 21 Test points O Adjust L308 for slightly less than 5 mV reading on the millivoltmeter. O Connect an oscilloscope (a.c.-mode, 5 mV) to M501 on the decoder board (see figure 19). O Adjust L309 for minimum 10.7 MHz on the oscilloscope. O Put back interconnection board No. 45430 (see figure 21). O Set the generator modulation to t 75 kHz,20 mV. O Connect distortion meter to one of the Fixed Output terminals. O Adjust L307 for minimum distortion, typical figure 0.006%. O Check the other channel. O Reduce the signal level to approx. 5 prV. O Connect the oscilloscoDe to one of the Fixed Output terminals. O Adjust L301 for as clean and distortionfree sinewave as possible. Start from an inner position and screw the core outwards. O Put back the signal plug P201 on the selectivity box (see figure 19). tEr P2O1 ,- * UOt Limiter/Detector above serial No. 00700 Jg30r Tl, c 339 ,rf, Figure 22 Limiterldetector aboue serial No. 00700 cR 30r MB D2OI I z U E o U u 3t1l | 68p P711(41 R ESI ST O R S M AR KEO W I I H A DOI ARE MET. FILM Il. C APAC I T O R S M AR KED W I I H A OOT ARE LOW NOISE/LEAKAGE 32e I -1F 330 p : a1- T- la -f- l) | - a J r l - a I -J I L r l I o-J- o l 1l = l r ;T L l - I8* tgh tE- fTctoz 1.-l 4 P 7 l 0 l a -L l3l J q -?crrr ? !- 3*, I - rm.,l* I +#ffihd Hl.ryffit* r*i*T I -lffiqIfffi:Fi1 ? ? r? ? -L.t,t I.I-II? I T I t m t u | - l | - | | JTEIiIEPHI IEBir J TLITr T l9,f rilEJA +:Prtp,Si ?r? I rrtf;rlil t ? J , Hfut+H?H HIe ItJtbi I Jt o301 ll *r) -, ,i,i ll *;1 *tit.trltlail , rr Al llr.: H li;U rt)? i ll iutj!afd= * lli s 3A -cR306 ii pf;t=filjiirHii . ll r ? .!, . qi- flO tt E 6-10, pE Figure 23 Limiterldetector board aboue serial No. 00700, foil side Figure 24 Limiterf detector board aboue serial No. 00700, component side I A. , / tl,+ Il ldl LI ftctor 1 l I L_l Tr ,rl 83 l xfl I rl:cl.J I inl )r-r I tll n r i l ,r#I *-l ti: : .,:. . . / L i m iter/Detector, d.c.-reference and d istortion O Connect oscilloscope (d.c.-mode) to the FM-Multipath Vert. terminal. O Pull out signal plug P20i on the selectivity box (see figure 25). O Connect signal generator toJ201 (see figure 25). Figure 25 Test points O Tune the generator to approx. 10.7 MHz, 500 pV mbdulated mono t 7b kIJz dev., 1 kHz modulation. O Set Bandwidth selector to Narrow. O Fine-tune the generator for symmetrical sinewave on the oscilloscope (figure 26). The frequency thus found is now used for the further adjustments. Figure 26 Symmetrical sinewaae O Switch off the modulation and set the generator output to 20 mV. O Set Bandwidth selector to Wide. O Pull out interconnector board No. 45430 (see figure 27). O Connect a d.c. millivoltmeter (range 100 mV) to P711, pin 4 (strap next to R786 on the main board, see figure 27). O Shortcircuit the strap to ground for a second. Figure 27 Test points O Adjust L308 for slightly less than 5 mV reading on the millivoltmeter. O Connect an oscilloscope (a.c.-mode, 5 mV) to M501 on the decoder board (see figure 25). O Adjust L309 for minimum 10.7 NHz