RAD"! SERVICE MANUAL
Contents
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3. s 66666666 6 6666666666 954228 1 595427 2 o o o 569229 3 o oo 594875 4 o oo 596925 1 575275 1 588567 1 986001 6 596897 1 K 77761 1 LIST PRICE Recessed Oval Hd W Screw Pkg of 5 For Dial Escutcheon 2 x 5 16 Phillips Recessed Rd Hd 1 Wd Screw Pkg of 5 eee eee enn To hold Dial Escutcheon Glass 4 x 1 4 Phillips Recessed Rd Hd 1 Wd Screw Pkg of 5 Oi aad Ca ewe eR ENEE KEREN E C Ce Y VO UME 4 2 6 4 69 470 3 0 5 67 0000 R TE 3 4 Wi 143 ER HA E TUNING eg RAE KS OREM TE KOS OE NTE AE Oe ORC ACCRUE op BASS TONU 46 60 Se sco ere pee eu vro wie 01000 016 000 ny au WGA TREBLE ONE rw aie sna VIII ENEE Age 4 6008 BC SW 31M 25M 19M Phong secs e se ee eaea WESTINGHOUSE cwe sce lane oa iw 9 Vox 00 We ny o s eyed s Screw Screw 2200 2 2 20 0200000 986178 1 586178 4 586178 5 986178 7 586178 6 o o o 586178 22 586178 19 Transfer 0 2000000 Transfer Transfer Transfer Transfer Transfer Transfer SEE CATALOGUE RS 200 FOR OTHER RESISTORS AND CONDENSERS ALL PRICES SUBJECT TO CHANGE WITHOUT NOTICE 6666666 66 s ee6 666 e 6 6 6666666666 e 666666666 6666666666 D SHORTED OUT ee WITCH IN BC uy 4 665 Tis METER 5000 OHMS PER VOLT Ss READINGS SHOULO BE WITHIN Z 20 AT 120 VOLT LINE PARE SERIES RESISTANCE 5 CIRCUITS AND SUBJECT TO ore VOLT METEX LOADING ee ES A
4. These trimmer locations are also shown in the accompanying illustrations Connect the low output terminal of the test oscillator to the receiver chassis for all alignment operations Regulate the output of the test oscillator so that minimum signal is applied to the receiver to obtain an observable output indication This will avoid a v c action The term Dummy antenna means the device which must be connected between the high test oscillator output terminal and the point of connection to the receiver in order to obtain idea alignment No signal 1 700 kc means that the receiver should be tuned to approximately 1 700 kc where no signal or interfer ence is received from a station or the receiver heterodyne oscillator The term Rock Through indicates that the receiver station selector should be rocked back and forth while making the indicated adjustment The adjustinent and rocking should be continued until the combined action results in the maximum deflection on the output meter On some tuning ranges it is found that more than one peak may be secured if the trimmer is adjusted over a wide enough range Whe this occurs it should be noted that oscillator circuits should be aligned using that peak which occurs at the lower capacity or inductance setting of the trimmer The 49 M band spread circuit is an exception to this it is just the opposite On R F or first detector trimmers the peak occurring with the
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6. LL VOLTAGE TC CHASSIS DLO i eo ehe 2 GBA 30 LE av 2 gov Lt X W987 X SOCKET READINGS LINEN DRIVE CORD 50 INCHES OF PART 5 0 PULLEY PART K 87297 POINTER ASSEMBLY PART 596108 502 DRIVE DRUM AND HUB PART 2432 PULLEY PART K 87297 1 SMALL PIECE OF ADHESIVE TAPE CORD CLAMPING EYELET PART 843 w THIS VIEW IS SHOWN LOOKING SPRING AT RIGHT FRONT END OF CHASSIS PART 5954451 10 WITH POINTER IN EXTREME LEFT a uM HAND TRAVEL TURNS APPROX DRIVE SHAFT ASSEMBLY PART d 595634 503 PULLEY PART 596744 1 W987 X DRIVE CORD OUTPUT TRANSFORMER BROWN is d RED E e HUM BLUE NEUT COIL SPEAKER CABLS PLUG VIEW PRONGS FACING SPEAKER FIELD RED amp BLACK YELLOW amp RED W 987 X REPRODUCER CONNECTIONS SET SCREW PART K 63486 1
7. Oe ss RADIO saone SERVICE MANUAL WESTINGHOUSE A C MODEL 987 X 9 TUBES 5 BANDS B C S W AND 31 25 19 METER BAND SPREAD CANADIAN WESTINGHOUSE COMPANY LIMITED Serviee Department Hamilton Ont SPECIFICATIONS RADIOTRON COMPLEMENT W SK7 a a e ee ees elef a Amplifier 5 W 6I5 Geccccccccee AUdiO Driver ge W 6SA7 e Converter Oscillator 6 W 6V6 G 6666666660666666 Output Be MN BERN se ee sees es Laf Amplifier 7 W 6V6 Ge eceosoccecceececccOUbUDui 4 W 68Q7 2nd Detector NeVeCe 8 W 5Y4 G ccccccceccesee Rectifier 9 W 6U5 Tuning Eye DIAL LAMPS 5 AND PHONO LAMP 1 WESTINGHOUSE MAZDA 44 6 3 V INTERMEDIATE FREQUENCY eecsoocoocoocoecocooosoccoccoceocoooooooo e 460 KC TUNING DRIVE RATIO 9 e rcesrrekseuuecevaeveneseevcsecvunv dot UNDISTORTED OUT ABER qve ein 0 1o tote 8 010 0 078 3187010 o 019 39 9 9 0 0 90 09 n 079 009 lt WATTS REPRODUCER s s s eee eoe lo INCH ELECTRO DYNAMIC WITH DIFFUSER CONE VOICE COIL IMPEDANCE AT 400 OYCLES 4 6 99999 o CF eNO ee eee OHMS POWER CONSUMPTION 6m m nr Rh w IR RITE STER RES E ene eun Ro LOO WATTS AUTOMATIC PUNING 4 659 66 oo GO SAS EEG AIG GZ lt BUTTON ACTUATOR TUNING SHIPPING WEIGHTS 25 CYCLE 80 LBS 60 CYCLE 78 LBS FREQUENCY RANGES CABINET DIMENSIONS BeCocsccccevcseeedO031755 KC Se Wa sv esi WK MC NIDTH 00 1 2 31 METRE 9 44 9 67 MC HEIGHT ecc 8 1 2 25 ME
8. TRE 60599 ell 66 11 95MC JEPTH 135 5 4 19 METRE 1t 05 15 42MC Here is the Binder you have been looking for This is a ring binder made of imitation leather very durable fine appearance Every service man should have two or three of these binders to hold his Westinghouse radio refrigeration washing machine etc Service Manuals Note the low price S No H 29640 net price each GENERAL ALIGNMENT PROCEDURE There are various alignment trimrners provided in the R F and oscillator coil tuned circuits The i f transformer adjustments are made by means of screws attached to molded magnetite cores All of these circuits have been accurately adjusted during manufacture and should remain properly aligned unless affected by abnormal conditions or altered during servicing Loss of sensitivity improper tone quality and poor selectivity are the usual indications of improper alignment The correct performance of this receiver can only be obtained when the aligning has been done with adequate and reliable apparatus It is not necessary to use a frequency modulated oscillator and cathode ray oscillograph to align these receivers Those service men that have this equipment will probably prefer to use it and for their convenience we have indicated on the trimmer diagram the proper connection point for the cathode ray vertical amplifier input terrninal A test oscillator is required as a source of the specified align m
9. ducer Reproducer Transformer Antenna and Ground Terminal eoo s sss sees ss B C Antenna Assembly 0000000000000000000000000 B C RP Agsembly 2200000000000000000000000000 B C OsciLllatore ceccccccccccccccsvcccccccceccece S W 31 Metre and C Band Oscillator Assembly S W 25 Metre Oscillator Assembly cccscrccvcece S W 19 Metre Oscillator Assembly cccccessece S W Band Spread R F Coil Assembly cccccccee S W Band Spread Antenna Coil Assembly 3 Gang Tuning 8 Button Aetugtor sse sees s es e 6 s 8 s ee Molanode 20 450 5 300 15 400 and 20 25 Trimming complete with Mounting Bracket 5 50 MMF Dual Trimming complete with Mounting Bracket 2 15 MMFo 20220000c90900000999999909992009999 99 Tubular Electrolytic BO 2D eeeoccccoccceooccccon Anti Drift 80 MM cccccccccccccccccvcvccscccs Anti Drift 190 MMFs 200000000000800000 0000040006 Anti Drift 89 MMF eeeeesecoocoocoocococooco Anti Drift 62 MMF eeeeeeeooosoosseoocoocovoo Temperature Compensator 33 MMF ss s s e s E e Temperature Compensator 10 HIR sss s s s e s e rn Volume 2 Meg total Tap at 700 NH ssss ss sees asas Treble Tone l Neg sees sees ss gg Res ee RRR Bass Tone 2 Meg with S P S T Power Switch Power complete with Glug ss sees saan aa aag aaa To hold Dial Scales to frame Pkg of 5 Tuning Shaft Assembly with braecket oc eon for Tuning Condenser Shaft e e ess RR oro Celluloid Phonograph
10. ent frequencies Visual indication of receiver output during the adjustment is necessary and should be accornplished by the use of an indicator or meter The procedure outlined below should be followed in adjusting the various trirnmer capacitors and molded cores Calibrate the tuning dial by adjusting pointer to the low frequency end of scale with gang condenser plates fully meshed The pointer should be set at the end of the horizontal line Adjustrnent is made by loosening the dial drum on the shaft Perform alignment in proper order as shown by the accompany ing chart starting with No 1 and following all operations across then No 2 etc The chassis bottom shield must be uc E 4 d pe ANT TRIMMER ANT TRIER E C 5 AT 11 800 6 3 AT 1900 RECHECK ous OPERATION AFTER LINE UP ON S W C BAND OSC CA 4 BC OSC TRIMMER 6 8 6745 AT 1500 S W CHBAND OSC 886 X K TRIMMER CA 19 METRE OSC AT 17 000 KC CORE L 15 AT 15 260 KC 7 7 AA Ha Fo MN 25 METRE B S CITAT i O C CORE 17 Adda AT 11 800 KC 3 BC OSC CORE L20 AT 600 KC 2 IST l F m x TRANSF 31 WETRE OSC E L 18 AT 9500 KC 4 6 6 BC RE AT RER ur C BAND RE S V A ANT C 25 SAT IEEE 0 3 MMER C 2 I F FREQUENCY 460 KC securely in place when making R F adjustments Adjustment locations and frequencies are shown on a sticker fastened to the bottom side of the chassis shield
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12. larger capacity setting of the trimmer should be used DUMMY ANTENNA 0 1 MFD CONDENSER FOR OPERATIONS 1 AND 2 200 0 MMF CONDENSER FOR OPERATIONS 3 TO 8 RA APPLY OSCI LATOR dm TO AI TERMINAL WITH LINK OPEN FOR ALL OPERATIONS 17 000 Ke aF 000 KC CONNECT OSCILLOGRAPH HI CONNECTION TO GRID OF U WITH 2 MEG RESISTOR IN SERIES AT GRID END OF CABLE WVAHDVIG DLLYWAHOS X 86M eng aun JE FE KZ ZZ ZZ ELLLLLoin M3A4U3H ABNL dur SALE 3a OL MOLA IB D DAI MME us saoDI mam Ze XILDA LDA C 24 3SH30NO ge PAON TOW ve MILIMS SUES 42399 M24 4I ME IS K bes at Es e i Gei 2 noaa GV A asz A00b 100 AOS Ozmoz He E Otis qu OZ ISD 259 ze PSD 827 voc TT NIAIS 0000000 TEEN JAZ ONINAL DZ ZBORY TOW ITBIAL oz ZG 9 oz 1005 Oc Gne oy MP 2 238 HDLIM aiT TWO rS GEA DOTO T 8078 000000 00049 zo za 035 Bt OOS GALA Spa DAY Vasen Sf Nz G3RIMOACNWA JI Le Andino 130 ang ciu 3l OSO 2 312 3ANOD div da 59 Dee LAMS9 LVS9 LMS9 AN WVYSVId SNIHIA KZer AN Quv08 VNINH3L Ou ONY INY b 6 388 d dt 83 1dn00 ALIDVdvJ 91 9 a IND 9S0 MO N3349 DG AOWTE 1 IN 0 NO0S c0 41 9 95 e c Gey m M S 980_aNvasf 1109 ONY 3H13W LE rS A006 600
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