Technics RS-B11W Service Manual
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Technics RS-B11W Service Manual

Technics RS-B11W Service Manual

Double cassette deck featuring 2 dubbing speed
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  • Page 2 RS-B11W ■ CONTENTS PAGE ITEM ITEM PAGE • Circuit Boards and Wiring Connection • Location of Controls and Components Diagram .......... 17 • Disassembly Instructions ......3 •...
  • Page 3 RS-B11W ■ DISASSEMBLY INSTRUCTIONS Fig. 1 Serial r - - - -, number plate L--- (E) (P) Fig. 2 Main circuit board tor assembly E � ) Fig. 3 -- -----,---- : Motor assembly Mechanism unit (TAPE [I]) (TAPE [I])
  • Page 4 RS-B11W Shown in Ref. No. Procedure To remove-. Remove-. fig.-. • 4 screws ···································· ..(A) Case cover • 2 screws .......... ( 8 ) .......... (C) • 3 screws • 1 screw ..........(D) Front panel assembly •...
  • Page 5 liS-lPl!t't'I ■ MEASUREMENT AND ADJUSTMENT METHODS T P1 adjustment VR (VR01) adjustment VR (VR02) High speed Normal speed 4 � V � " � � VRS 6� � c;> 6 R143 � R145 G--R144 Fig. 1 NOTES: Set switches and controls in the following positions, unless otherwise specified. •...
  • Page 6 RS-B11W Equipment: © Tape speed Condition: (TAPE [I], TAPE �) • Playback mode • Digital frequency counter • Dubbing tape speed switch • Test tape ... QZZCWAT ... Normal/high F· Normal speed adjustment \QilJ TAPE [D Playback head TAPE [I]...
  • Page 7 Playback gain Condition: Equipment: (TAPE II] , TAPE [ll ) • Playback mode • VTVM • Normal tape mode • Oscilloscope • Test tape ... QZZCFM 1. Test equipment connection is shown in fig. 2. 2. Playback standard recording level portion on test tape (QZZCFM 315 Hz) and, using VTVM, measure the output level at test points [TP4 (L-CH), TP5 (R-CH)].
  • Page 8 Note : Overall frequency response chart (Normal) Before measuring and adjusting, the overall frequency response make sure of the playback frequency response ( For the method of measurement, please refer to the playback fre- +6dB quency response). + 4 d B + 3 dB + 2dB (Recording equalizer is fixed)
  • Page 9 I it 1' =1 I 1't'' Condition: Equipment: Overall gain © • AF oscillator • Record/playback mode • VTVM (TAPE (ll ) • Normal tape mode • ATT • Oscilloscope • Input level controls ... MAX • Resistor (600Q) • Test tape •...
  • Page 10 RS-B11W ■ B LOC K DIAG RAM Dolby NR Selector Dubbing/Mixing ON/OFF S2-2 S 3 -2 off-on 0 2 1 ,23 I C 4 ( 1/2J Dolby NR/ M I X I NG AMP I C I ( 1/2 ) MPX IN-OUT P.B/EO AMP...
  • Page 11 RS-B11W ■ ELECTR I CAL PARTS LIST CAPACITORS NOTES: RESISTORS EAD ..Carbon ECBA ..Ceramic ECED ..Electrolytic Ceramic ..Metal-oxide ECEDN .
  • Page 12 ■ ut- 11 111',' Ref. No. Part No. Part Name & Description NOTES: ■ 1 . s1-1 �s1 -1 0 : Record/playback switcn (shewn i n playback position). SCHEMATI C DIAG RAM COILS MAIN CIRCUIT BOARD G) . . . Playback. � . . . Record FL METER CIRCUIT BOARD L 1, 2 QLM9Z9K...
  • Page 13 lit1:111't ' I ■ CI RCUIT BOARDS AND WI RING CONNECTION DIAG RAM LI N E OUTPUT CORD ________________________________________ _ _ Gt1Y&WIIT--� �GRY&WH1 __ RY - - � - � "--c•v--...--- -- -- "---GRY&WHT ·�-----...� , LI N E I N PUT CORD --------- -------�--- -- c:::::[IGRY- --.J r-== - :::::::::::t::::::::tj:t::::----GRY--s---...
  • Page 14 ■ lit1':11t't' .. it1':llt't' ■ ■ MECHANICAL PARTS LOCATION (Rear View) (Front View) l t i TAPE [I) , - - · 7 Qji) APPLY MOLYCOAT I � I EM-20L L _ , _j L PASTE SPECIFICATIONS NOTES: Pressure of pressure roller 35O ±5O g Wow and f l utter;...
  • Page 15 ■ ■ it 'J:111't'lllit l!:ll1 ■ CABI N ET PARTS LOCATION REPLACEMENT PARTS LIST Important safety notice Components identified by 6 mark have special characteristics important for safety. When replacing any of these components, use only manufacturer's specified parts. Ref. No. Part No.
  • Page 16 [JJ ..European PX. ( K) ( S) • Please use this manual together with the service manual tor model No. RS-B11W ( Original) order No. HAD 84052771 C9. • In this set, Dolby NR circuit by module P.C.B. is used to make up tor the shortage of Dolby IC ( NE657).
  • Page 17 RS-B11W ■ E LECTRICAL PARTS LIST CAPACITORS NOTES: RESISTORS ERO ..Carbon ECBA ..Ceramic Electrolyt ic . . . Metal•oxide Ceramic ECEDN ... Non polar electrolytic Ceramic □...
  • Page 18 RS-B 11W Part No. Part Name & Description Ref. No. COILS OLM9Z9K M . P.X. Coil L 1 , 2 OLOX0332KWA Peaking Coil L 3, 4 L 5, 6 OLQX0343KWA Trap Coil OLB0205K Bias Oscillation Coil COM BINATION PARTS EXRP102K103W CR 1 CR 3, 4 EXRP220K 1 24...
  • Page 19 RS-B 1 1 W ■ SC H EMATI C DIAG RAM TO MONTER TO REC EQ TO LINE OUT ■ CI RCU IT BOA R D - 4 -...
  • Page 20 RS-B11W NOTES: S1·1~S1 ·10 : Record/pl ay back swilch (shown in playback position). ■ Playback, ® . . . Record SCHEMATIC DIAG RAM 2 S2- 1 , S2-2 Dolby NA SWIICh (shown In OUT position). FL METER CIRCUIT BOARD MAIN CIRCUIT BOARD Dolby OUT, ®...
  • Page 21 •;� 11 JD'•'•-� 11 1ll't'• --� - - - _ - _ - _ - _ - _ - _ - _ - _ - _ - _ - "" - - - -=- - = - = - - - - ■...
  • Page 24 I M ET H O D ES D ES M EASU R ES ET REG LAG ES I 3. Faire jouer la bande d'essai (QZZCWAT) avec la BAN DE [1] et mesurer la frequence du signal de lecture. Si la frequence du signal de lecture n'est pas conforme a la valeur standard, ajuster le regulateur de tension du reglage de vitesse elevee pour la tete de lecture de la BANDE [1].
  • Page 25 4. Lire le voltage sur le voltmetre electronique et calculer le courant d 'effacement au moyen de la formule 1 0. Confirmer que les voltage de polarisation sont approximativement les suivants lorque le selecteur de bande suivante : est mis sur ses differentes positions. Volta ge a I istan ce R152 •...
  • Page 26 M ESSU N G EN U N O E I N ST E L L M ET H O D E N 3. Testband (QZZCWAT) mit BAND [1] wiedergeben und die Wiedergabesignal- Frequenz messen. Falls die Wiedergabesignal- Frequenz nicht mit dem Standardwert Obereinstimmt, Regelwiderstand fur Hochgeschwin­ digkeit fur BAND [1] - Kopf justieren (Siehe Fig.
  • Page 27 9. Gerat aut Betriebsart "Metallband" schalten. Testband QZZCRZ einlegen und Signale von 50Hz, 100Hz, 4. Loschstrom nach folgender Formel emitteln: 200 Hz, 500Hz, 1 kHz, 4 kHz, 8kHz, 10 kHz und 12,5kHz autnehmen. AnschlieBend die Signale wiedergeben Die Spannung Ober beide Enden von R152 (A) - osc s rom und pruten , ob die Kurve innerhalb des Bereichs im Gesamtfrequenzgangdiagramm fur Metallband liegt.
  • Page 28 Panasonic Service Deutschland GmbH T O ALL M I LITARY M A R K ET K DZ AND PS DG-BRANCHES Date : N o . : S U BJ ECT TEXT DOLBY rnn:r ENC Y Symp tom When r e c o rded and played in me tal tape pos ition , the C HA RAC T E R.
  • Page 29 Panasonic Service Deutschland GmbH TO ALL M I LITARY M A R K ET K D : A\D P S DG-BRANCHES Date : S U BJ EC T TEXT Ke ep thi s c ab l e suf f ic ier. t ly away from the P .
  • Page 32 Panasonic Service Deutschland GmbH T O A l l M I LITARY M A R K ET K DZ A\ D P S DG-BRANCHES N o . : D ate : S U BJ ECT TEXT E XCES S IVE Symp tom MECHANISM \OISE Too much gear no i s e i s generated f rom me c hanism in doub l e...
  • Page 33 Panasonic Service Deutschland GmbH T O A LL M I LITARY M A R K ET KDZ AND P S DG-B��NCHES Date : N o . : TEXT S U BJ E C T EXC ESS IVE Re pair Method MECHANISM XOISE Set a tube o f 0 .

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