1960 Motorola VWM60 Radio - Service Manual
Contents
1. BIAS CONTROL ADJUST FOR INSERT METER HERE 720 MA O CURRENT ADJUSTMENT RB SEE SERVICE NOTES 125 IN SERVICE MANUAL R16 1K Ei tla 0 sj SE s sajz Sla 8a 3 8 37 SIE fo ON OFF SW MN73 OR 2N176 By FON VOL Conny E5 A LEAD PWR OSC L o R 9 AMP 7V DC aw 66v i c s SPARKE 2 gt S PLATE S P ra Taal el Ay 2 p gt Elec7v REPLACEMENT PARTS LIST NOTE When ordering parts specify model number of set in addition to part number and description of part Electronic parts of equivalent rating are not necessarily of equivalent standards The components listed in this Service Manual have been chosen for reliability and applicability to the specific circuits involved For maximum customer satisfaction and minimized call backs use the exact Motorola parts replacement Ref Part Ref Part No Number Description No Number Description ELECTRICAL PARTS 48A124332 Transistor Type MN73 PNP junction pwr amp amp pwr osc C 1 20B544017 Capacitor mica trim 40 mmf to 430 mmf incl brkt MECHANICAL PARTS C 2 8R122291 Capacitor paper tub 002 mf 1000V C 3 20K541014 Capacitor mica trim 20 mmf to 120 mmf 43K543285 Bushing mtg manual tuning shaft Cc 5 8R121005 Capacitor paper tub 05 mf 200V 42B733793 Clip IF mtg C 6 204485708 Capacitor mica trim 395 mmf to 470 mmf 15K543815 Cover bottom C 7 21R115593 Capacitor cer disc 47 mmf 500V 13D543242 Escutcheon chrome c 8 21R482726 Capacitor cer disc 01 mf 500V 1445438102. 7 2 24K543287 Transformer 2nd IF 262 5 Ke LIMITED REPLACEMENT PARTS A RE e OET patie Note The volume of replacement on the following parts is small T 5 25C543395 Transformer pwr osc consequently it is suggested that ordering be done only as required 48C124246 Transistor Type 2N176 PNP junction 1V544042 Cover rear incl trans socket pwr amp amp pwr osc 1V544036 Kit radio mtg parts C21 6BF6 C10 C8 R10 R11 6CR6 R12 R9 R7 R6 C5 Cll RI El GB DRIVER DET AVC AF AMP MN73 OR 2N176 6BE6 NSISTOR PWR AMP C20 Tl CONV R2 C7 C6 Cl 6BA6 C12 Cl6 C13 R16 C9 T2 R8 R3 IF AMP TRA PARTS LOCATION
3. Insulator transistor c 9 21R122789 Capacitor cer disc 0l1 mf 500V 287051 Nut hex 3 8 32 vol amp bushing mtg Cc 10 21R125165 Capacitor cer disc 002 mf 500V 7B543267 Plate dial scale ret C 11 214542384 Capacitor cer disc 05 mf 50V 1K543277 Pointer C 12 21R482726 Capacitor cer disc 0l mf 500V 9K541991 Receptacle fuse C 13 21R410118 Capacitor cer disc 330 mmf 500V 5K13896 Rivet shoulder C 14 64K530177 Spark Plate 1 x 1 3 8 34B543390 Scale dial c 15 23B543394 Capacitor electrolytic 50 150V 3K560695 Screw tapping 6 20 x 1 2 trans mtg C 16 238543393 Capacitor electrolytic 50 150V 1000 8V 38129994 Screw tapping 6 20 x 1 rect mtg C 17 214542384 Capacitor cer disc 05 mf SOV 1V543435 Slider pointer incl rivets C 18 64K530177 Spark Plate 1 x 1 3 8 9A472148 Socket antenna Cc 19 8K122076 Capacitor paper tub 5 mf 100V 9K543387 Socket pilot light c 20 21K740806 Capacitor cer disc 025 MF 200V 9K539132 Socket tube 7 pin min c 21 21A542384 Capacitor cer disc 05 MF 50V 9B542339 Socket 2 pin transistor 257087 Speednut dial scale ret E 1 24K539955 Choke ant spark E 2 50C543225 Speaker PM 5 3 29 VC MOUNTING PARTS amp ACCESSORIES E 3 48K543405 Rectifier selenium E 4 65R10867 Bulb dial light 6V 44 64B543874 Bracket radio mtg front E 5 65R16248 Fuse 9 amp 7A543889 Bracket radio mtg rear 8B538244 Condenser generator L 1 2 amp 3 See Tuner Parts List 8A4491 Condenser noise suppression L 4 25B543396
4. _ SONME TO RECEIVER TO SIGNAL gt ANTENNA GENERATOR J q RECEPTACLE OSC CORE ANT CORE i i METAL SHIELD CAN L_ __ MUST BE ATTACHED DET NO 6985802330 TO PLUG DUMMY ANTENNA 9 RF CORE FRONT VIEW WITH ESCUTCHEON REMOVED UKE ALIGNMENT LOCATIONS om TRANS ISTOR PWR OSC C8 R5 R17 R18 T4 C17 MN73 OR2N176 T5 R20 B TB L4 L2 B Ll 6BF6 DET AVC 6BA6 TRANS ISTOR DRIVER C16 AF AMP T2 IF AMP PARTS LOCATION 6BE6 ANT CONV 6CR6 DET AVC AF AMP Tl CONN BOT VIEW COLLECTOR BASE TRANSISTOR CONN BOT VIEW T2 CONN BOT VIEW NOTES CAPACITORS Decimal values in MF all others in MMF unless otherwise specified VOLTAGES Measured from point indicated to chassis with a VTVM No signal input Tolerance 10 INPUT VOLTAGE 7V DC TUNING RANGE 540 KC to 1610 KC IF FREQUENCY 262 5 KC gt Indicates clockwise rotation of control CAUTION A LEAD MUST BE CONNECTED TO POSITIVE H SIDE OF POWER SUPPLY RADIO WILL NOT OPERATE AND DAMAGE TO COMPONENTS WILL RESULT IF CONNECTED OTHERWISE SCHEMATIC DIAGRAM PWR AMP Tl C15 l PIGIryNc d i Societal esha E 6BE6 ANT R13 CONV C3 RECEPT 6BF6 DRIVER MN73 OR 2N1 PWR AMP YEL SEE SERVICE NOTES IN SERVICE MANUAL R17 47 R19 2 7K DIAG _63D543597 A BLK l 76 BLU 74 01 BI SHG c14 g ESBE SPARK 2 P e E s Rl z 315 PLATE S a a S f a 5
5. Choke filter 32B543887 Gasket 36K542005 Knob dummy Resistors Note All resistors are insulated carbon type 36B522020 Knob tone unless otherwise specified 36K542973 Knob tuning amp vol R 1 6K122324 l meg 20 1 2W 281376 Nut hex 3 8 32 radio mtg R 2 6K121687 47 000 20 1 2W 38128062 Screw tapping 10 x 3 8 spkr mtg R 3 6K128952 180 10 1 2W 6A4141 Suppressor noise R 4 6K122313 100 000 20 1 2W 1V544037 Trimplate chrome incl rubber tubing R 5 18K544000 Control dual amp switch RSA Vol 2M 4K48 1689 Washer felt knobs R5B Tone 2M R 6 6K119407 3 3 meg 20 1 2W TUNER 77K563073 MT 300 PARTS R 7 6K119407 3 3 meg 20 1 2W R 8 6K122324 l meg 20 1 2W L 1 24K562246 Coil antenna R 9 6R6015 220 000 20 1 2W L 2 24K562245 Coil RF R 10 6K119408 10 meg 20 1 2W L 3 24K562244 Coil osc R 11 6K122324 l meg 20 1 2W 77K563073 Tuner MT 300 complete R 12 6K122324 l meg 20 1 2W 76K536535 Core iron R 13 18K542493 Bias Control 125 76K560447 Core iron R 14 6K543800 Thermistor 10 25 C 5A533933 Grommet core mtg R 15 6A488139 5 6 10 1W 2B533929 Nut tension drive R 16 6K127960 1000 20 1 2W 22K534525 Pin roll tuning shaft R 17 17K488266 Wirewound 47 10 1 2W 47K563075 Shaft manual tuning R 18 6R5614 56 10 1 2W 26A535533 Sleeve iron ant amp RF coil R 19 6K119926 2700 10 1 2W 264535534 Sleeve iron ose coil R 20 6A543419 Varistor special 41B536529 Spring retaining tuning shaft T 1 24B543286 Transformer Ist IF 262 5 Ke
6. MOTOROLA ewice Marnalk GENERAL INFORMATION TYPE Automotive type 6 volt superheterodyne receiver designed for custom installation in 1960 Volkswagon cars This receiver contains a transistor output stage atransistor power oscillator for B supply and four miniature tubes TUNING RANGE 540 to 1610 Kc IF 262 5 Ke OPERATES FROM 6 volt storage battery negative ground TUBE AND TRANSISTOR COMPLEMENT 6BE6 Conv 6BA6 IF amp 6CR6 Det AVC AF amp 6BF6 Driver MN 73 or 2N176 Transistor pwr amp MN 73 or 2N176 Transistor pwr osc for B supply DIAL SCALE BACKGROUND POINTER WITH TUNER SET TO 1610 KC SET POINTER TO MARK AND CEMENT TO DIAL STRING AUTO RADIO MODEL VWM60 SPEAKER ANTENNA ANTENNA nelni A LEAD SET TUNER SO CORES ARE OUT OF COILS 1610 KC DIAL STRINGING DETAIL MOTOROLA AUTO RADIO WARRANTY SERVICE STATION PROCEDURE FOR BRANDED MODELS l The definition of a Motorola Branded Model is one that is branded with the Motorola name and distributed to deal ers through authorized Motorola Distributors 2 Before performing a warranty repair on a Motorola Branded Auto Radio you must first receive from the cus tomer the Customer s Warranty Policy This policy must be filled in by the selling dealer at the time of retail pur chase The Customer s Warranty Policy must show the radio to be within the ninety day warranty period if the re pair is to be handled under t
7. bout 15 lead minutes ALIGNMENT Connect an output meter across the speaker voice coil Set volume control to maximum Attenuate signal generator output to maintain 1 79 volts on output meter at all times to prevent overloading receiver GENERATOR FREQUENCY 400 cycle mod GENERATOR CONNECTION TUNER SET TO ADJUST IF ALIGNMENT ls Ant recept thru ol mf amp chassis 262 5 Ke Hi end stop Adjust for maximum RF ALIGNMENT 2s Ant recept thru dummy see fig 1610 Kc Hi end stop Adjust for maximum NOTE Do not perform steps 3 4 5 amp 6 unless the tuner has been tampered with or components have been replaced Be fore proceeding with step 3 back tuning cores as far as possible out of coils to minimize their effect on trimmer adjustments 3 Ant recept thru 1610 Ke Hi end stop 5 6 amp 7 Adjust for maximum dummy see fig 4 u 1200 Ke Tuner carriage 8 9 amp 10 Adjust for maximum 9 32 from hi end stop 5 1610 Ke Hi end stop 5 6 amp 7 Adjust for maximum 6 Repeat steps 4 amp 5 until no further increase then cement tuning cores in place step 5 should be last adjustment ANTENNA TRIMMER Te Weak station 7 With radio installed in car and around 1400 Kc antenna fully extended adjust antenna trimmer for maximum ANTTRIM OSCTRIM TOP 1ST IF TOP 2ND IF PLUG TO FIT RECEIVER ANTENNA RECEPTACLE 6 RF TRIM REAR VIEW E aTa aa a a e RECEPT 1610 KC
8. he Motorola Auto Radio War ranty Flan 3 The removal or reinstallation of the radio the elimina tion of motor noise tire static electrical interference or faulty installation and aerial repairs are not considered as warranty repairs Consequently charges for these serv SERV 1 RADIO POLARITY WHEN SERVICING THIS RECEIV ER THE A LEAD MUST BE CONNECTED TO THE POS ITIVE SIDE OF THE POWER SOURCE IF CONNECTED OTHERWISE RECEIVER WILL NOT OPERATE AND DAM AGE TO COMPONENTS MAY RESULT 2 POWER SUPPLY REQUIREMENTS It is preferable to use a storage battery without a battery charger in place of a battery eliminator If a battery eliminator is used it must be well regulated and filtered 3 POWER TRANSISTOR REPLACEMENT When replacing MOTOROLA INC 4545 WEST AUGUSTA BLVD PartNo 68P543946 11 59 ICE Price 10 Cents ices are to be borne by the customer 4 Fill in the Motorola Auto Radio Warranty Labor Claim Part No 54P480884 and mail white and green copies to the Motorola Distributor serving your area The yellow copy is to be retained by the Warranty Service Station for his files 5 Defective parts for warranty repairs made on Motorola Branded Auto Radios are to be sent to your Motorola Dis tributor for free replacement supported with the defective parts return form which you are now using 6 Only those service shops authorized by their Motorola Distributor can perform repairs within the warranty per
9. iod on a no charge basis to the customer If you are not already authorized as a Motorola Auto Radio Warranty Service Sta tion and you are interestedin handling this service please contact your Motorola Distributor for complete details NOTES a power transistor be sure transistor insulator is in place and well greased and that the mounting screws are securely and evenly tightened Use only the transistor specified in the Replacement Parts Listfor replacement See Notes 4 amp 5 4 POWER TRANSISTOR _ INSULATOR When replacing a power transistor or power transistor insulator be sure to coat both sides of insulator with DC 4 grease Motorola Part No 11M490487 to insure proper heat dissipation 5 POWER TRANSISTOR CURRENT ADJUSTMENT After a power transistor has been replaced the collector current CHICAGO 51 ILLINOIS Printed in U S A should be checked and adjusted for proper operation c Adjust R13 for a reading of 560 ma with 6 3 volts input to the radio A lead a Insert a low range 0 1 or 0 2 amp DC ammeter in the primary ground returnlead of the output transformer NOTE Two values of radio input voltage are given as a T4 Connect the negative post of the meter to ground convenience to service personnel in order to accomodate see Schematic different power sources The current value stated on the Schematic Diagram is for 7 volts input to the radio A b Turn the radio on and allow it to heat up for a
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