User manual MCINTOSH MR 71

[. . . ] / @o5:a-5 ii FM STEREO TUNER MR 7I TABLE OF CONTENTS 1 2 6 8 B 9 I v l, INTRODUCTIONTECHNICAL ESCRIPT]ON D FRONT PANEL INFORMATION BACK PANEL INFORMATION INSTALLA CONNECTIN A u d i oO u t p u t s Stereophonic FM Multiplex Monophonic M F RemoteAmplifie Off-The-Air Recording_ Antenna ConnectionsoPERAT|NG TNSTRUCTTONS-_--=-S t e r e o p h o n iF M M u l t i p l e x _ c Monophonic M F ADJUSTMENTS M u t i n gT h r e s h o l Dial PanelLightsOutput Adjust-GUARAN CONTENTS 9 9 11 11 I1 1l T2 T2 IZ T2 l3 l-) F? a F - lJr 3 p { -t THANKYOU you own, you r ank high fro Ju d g i n g m th e ster eoequipm ent music listener s. a mo n g d i scri mi n a ti n g You ar e pr obablyno fre sh ma n h e n i t co mesto ster eo. Never - the- less ask you w we to re a d a n d ca re fu l l yfollow these instr uctions insur e a to su cce ssfu lp a rtn e rsh ipbetweenyou and your new ster eo equrpment. Y o u n o w h a ve " T H E BEST. "Used pr oper lyyou ar e in for enjoyment. th o u sa n d s f h o u rso f m usical o l f yo u a re i n a h u rry, r ead page3 fir st. Thisgivesyou a br ief o u tl i n eo f w h a t e a chcontr oland indicator does. Reading e tim f o r t h i s m a n u a li s 3 0 m i n u t e sT h i si s t i m e w e l ls p e n t . [. . . ] P C MODESELEGTOR POWER OFF b r i n g s h e t u n i n gt o m i n i m u m i s t o r t i o n . h e t d T A F C c t i o n e p e a t st s e l e a c h i m et h et u n i n g a r i f t dial is movedto a differentstation. T h e a m o u n to f A F C a c t i o ni s a d j u s t a b l e with the AUTO FREQ. CONTROL. Fuil teft (MlN) positionof the control cuts off AFC action. Full right (MAX)position gives maxim u m A F Ca c t i o n . T u r n so f f t h e t u n e r A C p o w e ra n d t h e A C o u t l e to n t h e t u n e r b a c kp a n e l . MONO P r o v i d e m o n o p h o n i F M a t b o t h p a i r so f s c l e f t a n d r i g h tc h a n n ea u d i oo u t p u tj a c k s . l STEREO AUTO T h e S T E R E O U T Op o s i t i o n r o v i d e s o t h A p b m o n o p h o n iF M a n d F M m u l t i p l e x t e r e o t c s a t h e l e f ta n d r i g h tc h a n n ea u d i oo u t p u t a c k s . j l y A s s u m e o u h a v et h e M R 7 1 M O D E E L E C S T O Ri n t h e S T E R E O U T Op o s i t i o nY o ua r e . A listening a stationbroadcasting monoto FM phonic. The stationswitches MpX stereo to b r o a d c a s t T h e M U L T I P L E Xn d i c a t o rw i l l . i l i g h t . T h e M R 7 1 w i l l a u t o m a t i c a l sy i t c h o lw t F M m u l t i p l e xs t e r e o o p e r a t i o n . l f m o n o b r o a d c a s t i n gs r e s u m e d t h e M R 7 1 w i l l i a u t o m a t i c a l sy i t c h o F M m o n o p h o n i c . lw t AUTO FREQ. CONTROL N o r m a l l yt, h e b e s tt u n i n go c c u r s i t h t h e w A U T OF R E QC O N T R Os e t a t o r n e a r M A X . L position. lf severalstationsare very close t o g e t h e o n t h e d i a l , o r i f a d e s i r e d t a t i o n s r s i veryclose a muchstronger to station, lower a A F Cs e t t i n gs u s u a l l y e e d e do r b e s tt u n i n g . i n f MUTING our O U T - T h i sp o s i t i o nu r n so f f t h e m u t i n gt o t a l l o wc o n v e n t i o n au n i n g w i t h i n t e r s t a t i o n tl n o i s ep r e s e n t . s e t h i s s e t t i n gt o l i s t e nt o U w e a ko r d i s t a n ts t a t i o n s h a t h a v e n o i s eo r t interference. l N - T h i s p o s i t i o nu r n s o n t h e m u t i n gc i r t c u i t . M u t i n gs u p p r e s s ea l l b a c k g r o u n h i s s s d a n d n o i s e u s u a l l yh e a r d w h e n t u n i n g b e tweenstations. Weakor distantstations that c a n n o to v e r r i d e h e b a c k g r o u n d o i s ea n d t n i n t e r f e r e n ca r e s u p p r e s s e b y t h e m u t i n g . e d PANLOC BUTTONS The Automatic Frequency Control (AFC) c i r c u i t a k e sF Mt u n i n ge a s i e rl. t e l i m i n a t e s m y t h e p o s s i b i l i to f t u n e r d r i f t . T h e A F Cc i r c u i t i n t h e M R 7 1 i s e l e c t r o n i c a ldy l a y e d n i t s le i actionThisis an exclusive clntosh evel. h e nt h e t u n i n gd i a l i s m o v e d t h e W , AFCcircuitis temporarily off. Whenthe cut dial pointercomesto rest on a stationthe A F C g r a d u a l l y o m e s i n t o o p e r a t i o nT h i s c . The AFCautomatically At the bottomof the front cornersare the PANLOC buttons. Aftera tuner is installed on the PANLOC shelf, depressing pANLOC the b u t t o n s i l l l o c kt h e t u n e rf i r m l yi n p o s i t i o n . w Depressing the PANLOC buttons a second t i m e ( a sw i t ha b a l l - p o i n te n )w i l lr e l e a s eh e p t t u n e r . T h e t u n e r c a nt h e n b e s l i df o r w a r d o t t h e i n s p e c t i oa n d a d j u s t m e np o s i t i o nT h e n t . PANLOC systemgivesyou absolute easeof installatiooperationndmaintenance. , n r o r * o r o * o r o * , F * r , n n n o " r o n ilADI IN USA TP2 f T e s tp o i n tT P 2 i s p r o v i d e do r t u n e rc i r c u i t n t a l i g n m e n tl . [. . . ] OUTPUT ADJUST *ii I i:ilj A, \\ v) \\--7 t/ , t'":, , . iit', , . ti. , r. , . ', -. rt' , t t: , ; ii. , : -':. . . 1 ; , . -. . . t OUTPUT ADJ j:liiiiir. i*ii T h e M R 7 1 u l t r a s o n i c u t i n gc i r c u i ts u p m pressesall noise betweenstations. lt suppresses all weaker stations not strong enoughto override the background noise. T h e m u t i n gt h r e s h o l d e t t i n gd e t e r m i n e s s the strength the signal of whichcan be heard w i t hm u t i n gi n o p e r a t i o n . h em u t i n g h r e s h T t old is carefully adjustedto optimumat the factory using precisiontest instruments. [. . . ]