Technical Letters 2
Contents
1. TECHNICAL INFORMATION SERVICES Bulova 4 Technical Letter No 21 ACCUTRON SERIES 221 REPLACING THE STEM Part 176 IMPORTANT The Setting Lever Screw is located between the spring arms of the electrical disconnect switch In order not to distort these springs it is important to use a well formed screwdriver blade 60 mm in width The pawl bridge assembly has a circular cutout allowing for easy access to the screw head Care must be taken not to inadvertently alter the location of this assembly AOU os ES Je pelo J SETTING LEVER SCREW TO REMOVE 1 Pull the stem to the setting position to assist in removal and replacement 2 Unscrew the setting lever screw two to three full turns 3 Keeping pressure on the screwdriver gently ease the stem out TO REPLACE 1 Press in the screw slot with screwdriver and ease the stem in to place rotating so as to properly engage the setting pinion 2 Tighten the setting lever screw Check for correct operation Important If the screw head has been damaged make sure that there are no metal slivers touching the switch springs causing a short circuit WHEN REPLACING THE CROWN 1 Use a chuck type pin vise to hold the stem on the bearing surface not by the square 2 Tighten the crown using normal watchmaker care so as not to twist or bend the stem Important The dust cover of the crown should be in light contact with the bezel The crown should never be j2. 000 Ext 775 776 4 MOVEMENT CHARACTERISTICS 174mm 440 Hz Onan Movement Dimensions Tonneau Shape 7h x 8 ligne 19 4 mm 763 long x 17 4 685 wide 4mm thick without battery Index Wheel Diameter 2 15 mm 270 teeth Electromagnetic Coils two with approximately 8 100 turns of insulated copper wire on each Tuning Fork Frequency cycles per second This is the tone of Transistor Hybrid integrated circuit Electrical Disconnect When the stem is pulled out the watch System stops due to a unique electrical discon nect system thereby allowing for storage in this position The same cell will operate the watch for a full year after this storage period Jewels 14 Accuracy Guaranteed to keep time within one minute per month A special mercury oxide power cell approximately 1 35 volts Identified as ACCUTRON 221 Power Source FEATURES This is the first American made Tuning Fork Watch to be marketed in Ladies Conventional Size Cases Pendant Styles and Selected Mens Styles There is but one caliber Model 2210 Equipped with hour and minute hand only As of printing date SETTING INSTRUCTIONS 1 Pull crown out 2 Turn hands either direction until minute hand is slightly ahead of desired minute marker then turn hand backward to this marker Push crown in without turning 3 As with any lady s wat
3. 605 S M Q Analog Up 263 Series iy Aa S M Q Analog Up 2640 601 S M Q Electroset Up 266 Series 247 S M Q Analog Up 268 Series 605t S M Q Analog Up 2690 602 S M Q Analog Up 2772 10 242 S M Q Analog Up For Power Cell 604 use 242 cell Cell 317 is used for 2633 10 in all watch cases except depthometer case 8459 in which 603 is used tExcept for cases C4156 and C4229 which use cell 610 Caution the incorrect cell was stamped in some case backs TECHNICAL INFORMATION SERVICES BULOVA WATCH COMPANY INC 75 20 ASTORIA BLVD JACKSON HEIGHTS NEW YORK 11370 212 565 4707 A Subsidiary of Loews Corporation RR Seo its Bulova Watch Time LETTER 72 SEPTEMBER 1982 Technical Ae Letter IMPORTANT NEW LUBRICATION FINDINGS ON SERIES 242 245 246 250 As a result of extensive field tests we have revised our lubrication procedures for the above calibers Please change your Service Manuals to now read Lubricate ALL upper and lower train wheel pivot holes and include the lower sweep second wheel bearing with Lubricant OL216 Moebius Synt A Lube 9010 2 NOTE Caliber 242 Service Manual and Technical Revision Letter 42 should be changed to read as noted above In addition the cannon pinion drive wheel junction dial train posts and setting mechanism are to be lubricated with OL 206 Moebius 8020 50 TECHNICAL INFORMATION SERVICES BULOVA WATCH COMPANY INC 75 20 ASTORIA BLVD JACKSON HEIGHTS NEW
4. YORK 11370 212 335 6000 A Subsidiary of Loews Corporation
5. ammed up against the case nor so far from it that there is a visible separation of the bezel and the dust cover SCREW 306 ACELL STRAP 141 Correct replacement of the Power Cell does not require loosening Screw 306 The Cell Strap 141 should be rotated out of position as outlined in Technical Letter 19 Should a movement be brought in for repair missing the Cell Strap 141 the Insulator 610 or Screw 306 these parts may be purchased through your local Authorized Bulova Material Distributor BULOVA WATCH COMPANY INC 62 10 Woodside Ave Woodside N Y 11377 e 212 335 6000 Ext 775 776 Bulova and b are registered trademarks of the Bulova Watch Company Inc All information contained herein is based on the latest product information available at time of printing The right is reserved to make changes at any time without notice Printed in U S A 25M 1174 BULOVA TECHNICAL INFORMATION SERVICES February 1974 Technical Letter No 19 ACCUTRON SERIES 221 REPLACING THE POWER CELL T 2 10 Clean and wipe away any accumulated material from exterior of case to prevent dirt from entering movement when case is opened Open the case Apply a case knife at the groove provided For water resistant models use a suit able case wrench Remove movement from the case back and place in bezel This is not necessary on water resistant models Insert a pointed tool in the hole near th
6. ch without a second hand it is good practice to listen to make certain that the movement is running If necessary tap the case lightly at the 3 or 9 to start the tuning fork vibrating SERVICING See note Series 221 has been designed for easy serviceability Thecoil assemblies of the Series 221 may be removed without the necessity for disassembling any other part of the move ment Parts and technical information will be released to the jeweler at a future date With the exception of power cell replacement and regulation it will be required that all Model 2210 be returned to our New York Service Facility for repair until the early part of 1974 This will allow very close quality control REGULATION The 221 Accutron regulators are calibrated with eight divisions to provide for easy reference during regulation Their appearance is similar to the 214 218 Series Each division represents two seconds per day change in rate of the tuning fork To regulate two seconds per day s ower move either regulator one division away from the center of the movement See Illus tration To regulate two seconds per day faster move either regulator one division towards the center of the movement See Illustration Rotate the regulators with a pegwood stick applying pressure on the ears of the regulators f desired correction is more than four seconds a day it is recommended that both regulators be move
7. d equal amounts Maximum regulation is 32 seconds per 24 hours The Series 221 Accutron is factory regulated in the dial up posi tion to plus 2 seconds per day and will produce a double trace line on a Vibrograf B 200A using beat selector 19 800 and a double trace line using beat selector 19 800 on a Vibrograf B 100A Note Some mportant Reminders When returning Watch to Bulova for Service Address package exactly like this Service Department 75 20 Astoria Boulevard Jackson Heights N Y 11370 Do NOT add the name Bulova Watch Co to the address PRINTED IN U S A e nsure package If possible send by registered mail e Do NOT send watch in its display box Box cannot be returned 20M274 Bulova Ad TECHNICAL INFORMATION SERVICES November 1974 Technical Letter No 20 BULOVA ACCUQUARTZ DIGITAL WATCH SERIES 228 Light Emitting Diode L E D MOVEMENT CHARACTERISTICS Quartz Frequency 786 432 Hz cycles per second Movement Dimensions 13 Ligne Diameter 29 34 mm 1 1 8 Height 7 98 mm excluding battery contact strap 5 16 Elements Over 1 500 transistors contained in a C MOS IC chip Complementary Metal Oxide Silicon Integrated Circuit plus 2 Bi Polar Display Drivers plus 1 Quartz Crystal Power Source Two Silver Oxide Power Cells Bulova 228 Each rated at approximately 1 5 volts Accuracy Laboratory tested to one minute a year Guarantee One year exclud
8. d while it is in the out setting position and the setting mechanism disengages either of the two following procedures are recom ed 2 Remove the hands and dial and with f 1 Holding the movement and a pointed a slight pressure carefully push the tool in a horozontal position carefully push the set lever into the in running set lever into the in running pos position Only a slight pressure is ition See fig 2 necessary to accomplish this fix See fist oe A N o ee eet ooa J t FIG 1 SIDE VIEW FIG 2 TOP VIEW TECHNICAL INFORMATION SERVICES BULOVA WATCH COMPANY INC 75 20 ASTORIA BLVD JACKSON HEIGHTS NEW YORK 11370 212 565 4707 A Subsidiary of Loews Corporation It S Bulova Watch Time LETTER 85 ec nica TIPS ON HOW TO SIZE 3 POPULAR WATCH BRACELETS SHORTENING MESH BRACELETS WHICH USE A LOCKING JAW CLASP 1 Open clasp and remove bracelet Fig 1 Locking jaw IMPORTANT Note the grooves on the underside of Grooves the bracelet 2 With good bracelet cutting shears such as Bulova Clipper 101 shorten the mesh by cutting ON THE GROOVES To center the buckle cut equal amounts from each end Fig 2 3 Reinsert the cut end into the clasp Locking jaw 4 BEFORE CLOSING THE CLASP Fig 2 BE SURE ITS LOCKING JAW WILL ENTER THE GROOVE IN THE MESH Groove CAUTION Ifthe jaw does not enter the groove the clasp may be broken when it is closed 5 Close the cla
9. e end of cell strap 141 Apply downward pressure and swing strap away from cell Do NOT loosen any screws for this operation Accutron 221 Cell Cell Strap 141 Screw 306 Do NOT Loosen D NOTE If cell strap has become detached SLIDE the forked end into RECESS of Insulator 610 insulator 610 before swinging into place Red insulation on cell strap faces case back Screw 306 Do NOT Loosen Cell Strap Hold Down Post Red Insulation Invert movement and power cell will fall out Inspect for foreign material in cell compartment or on underside of cell strap Wipe suface as necessary to assure good electrical contact Do NOT scrape away red insulation on cell strap Check new power cell Approximately 1 35 volts Insert power cell with imprinted side facing down Reposition cell strap into insulator No 610 Swing strap into hold down post applying downward pressure with a pointed tool in the hole near the end of the strap Make sure the strap is FULLY ENGAGED into the hold down post Snap back models Remove movement from bezel PLACE IN CASE BACK pull crown to setting position snap bezel and case together by applying pressure first on the 12 o clock side and THEN SNAP 6 O CLOCK SIDE INTO PLACE Water resistant models Retighten case back with a suitable case wrench making sure case gasket is properly positioned BULOVA WATCH COMPANY INC 62 10 Woodside Ave Woodside N Y 11377 212 335 6
10. ing power cells FEATURES e Single Display Button Activation A single but ton controls the display of the seconds min utes hours and date A M Dot A dot appears on the display to differentiate between A M and P M Date Feature Display includes date display Shock Resistant Meets FTC requirements Anti Magnetic Meets FTC requirements Water Resistant Dependent upon case em ployed SETTING INSTRUCTIONS AM DOT Illuminated dot in _ theunitsofhours __ indicates A M Its _ __ absence indicates PM SET BUTTON Setting Sequence setting the minutes before beginning 1 MINUTES a Push crown in to Position 1 display time and hold crown If no display is shown press then release the set button Continue to depress crown in Position 1 to display minutes and hours Wait until the time standard you are using as the reference to which you are setting the Accuquartz watch reaches the 60th second marker At that moment depress the set button and hold both it and the crown crown in Position 1 c Minutes will advance at the rate of one per sec ond When proper minute is reached release set button then crown NOTE When the set button is pressed for the minute adjustment the seconds reset to zero and begin count ing and you have therefore synchronized the seconds If you interrupt the seconds counting by releasing the set button prematurely start the proce
11. s adhesive 3 The adhesive will dry within minutes resulting in a neat secure bracelet adjustment that will eliminate problems If you have difficulty loosening a bracelet screw occasionally caused by factory plating use a proper fitting screwdriver and try turning the screw in slightly first This will usually free a stubborn screw so that it can be removed easily RECOMMENDED ADHESIVES 1 Aaron alpha crazy glue cement Available at your local watch material supply house 2 Unbrako Adhesive supplied with the Bulova Screw Assortment for watch bracelets BS1C Its Bulova Watch Time LETTER 83 Technical Letter POWER CELL LISTING BY MODEL NUMBER PART 1 BULOVA INSTALL THE CELL MODEL CELL TYPE OF WATCH WITH ENGRAVED SIDE 1005 602 S M Q Analog Up 1105 606 S M Q Analog Up 2025 606 S M Q Analog Up 2035 606 S M Q Analog Up 2105 606 S M Q Analog Up 214 Series 214 Accutron Analog Down z 218 Series 218 Accutron Analog Down 219 Series 218 Accutron Analog Down 2210 221 Accutron Analog Down 224 Series 218 Accuquartz Analog Down 230 Series 218 Accutron Analog Down 231 Series 218 Accutron Analog Down 242 Series 242 S M Q Analog Up 243 Series 247 S M Q Analog Down 2440 247 S M Q Analog Up 245 Series 247 S M Q Analog Down 246 Series 247 S M Q Analog Down 2470 247 S M Q Analog Down 2480 601 S M Q Analog Up 2500 602 S M Q Analog Up 2522 10 242 S M Q Analog Up 2562 317 S M Q Analog Up 262 Series
12. sp securely ADJUSTING BRACELETS WHICH USE A SLIDING CLASP NOTE Location of notches may vary with style 1 Open the lock on the sliding portion of the clasp 2 Turn the bracelet over and note the notches on the clasp A Fig 1 and the corresponding notches on the underside of the bracelet B Fig 1 3 To adjust the bracelet line up the notches on the clasp with the notches on the bracelet Fig 2 CAUTION If the notches on the clasp do not enter the notches on the bracelet the clasp may be damaged when it is closed lt DO NOT CUT XRACELET EXCESS 4 Close the lock on the clasp securely DO NOT CUT BRACELET EXCESS OVER TECHNICAL INFORMATION SERVICES BULOVA WATCH COMPANY INC 75 20 ASTORIA BLVD JACKSON HEIGHTS NEW YORK 11370 212 565 4707 A Subsidiary of Loews Corporation ADJUSTING BRACELETS WITH REMOVEABLE LINKS HELD BY SCREWS Many watches made today have bracelets with removeable links held by screws To prevent accidental loosening these screws are factory sealed with an adhesive Therefore once you have loosened a bracelet screw you must reseal that screw into place The procedure is simple apply 1 After sizing when the bracelet links have been reassembled and the screws inserted into their holes Fig 1 place a drop of quick drying adhesive where the screw head meets the bracelet Tink 2 Tighten the screw into place Fig 2 using the correct size screwdriver Wipe off any exces
13. ss over again com mencing at the next 60th second marker b SA EXAMPLE If you want to set your watch to exactly 5 15 start advancing the minutes exactly on the 60th second marker of the time by which you are setting the Accu quartz When the minutes read 15 let go of the set button The seconds will now be synchronized to the exact time standard along with the minutes Then pro ceed to set the hour as follows DISPLAY Pas Time Momentarily push 7 POSITIONS crown into Position Display will remain on 2 for about two seconds A after crown is released 2 Seconds Push crownin all the way to Position 2 and hold 3 Date Pull out and hold _ crown to Position 3 T Neutral ce Seconds NEUTRAL Norma wearing position non display hh mmes position ours The sequence for setting the Accuquartz watch must be followed in the proper order First set the exact Minutes then the Hour then the Date The procedure is not difficult but please read all the way through at least the directions for 2 HOUR a Do not push crown b Push and hold set button only c Hours will advance at the rate of one per second When proper hour is shown release set button NOTE To check for a m or p m pull crown to Position 3 to make sure that the illuminated dot appears in the proper twelve hour period otherwise the date will change at noon instead of midnight When on it indicates a m I
14. ts absence indicates p m If time of day is after 12 noon advance hours until illuminated dot disappears 3 DATE a Pull out and hold crown b Push and hold set button c Date advances at the rate of one per second When proper date is shown release set button d On the first day of each month following a month with less than 31 days advance the date by fol lowing steps a and b under Date IMPORTANT NOTE Displaying seconds by pressing the crown in all the way and pressing the set button at the same time may cause the unit to stop or reset to zero No damage has been done to the movement but the watch is no longer displaying correct time Reset watch in ac cordance with instructions ay Bulova and Accuquartz are registered trademarks of the Bulova Watch Company Inc All information contained herein is based on the latest product information available at time of printing The right is reserved to make changes at any time without notice Printed in U S A 25M 1174 r Its Bulova Watch Time LETTER 386 PN l FEBRUARY 1984 Technical letter SUBJECT REMOVING THE STEM FROM CALIBER PUW 5120 The stem must be in the in running position during removal to prevent the setting mechanism from disengaging a Also a screwdriver with a inm blade is to be used when depressing the stem release pin Anything smaller may cause damage or disengage the setting mechanism If the stem is remove
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