Heathkit GC-1005 Assembly Manual Download Page 1

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Summary of Contents for GC-1005

Page 2: ...as distributors This protection is exclusively yours as the original purchaser Naturally it doesn t cover damage by use of acid core solder incorrect assembly misuse fire flood or acts of God But it does insure the performance of your Heathkit electronic product anywhere in the world for most any other reason After Warranty Service What happens after warranty We won t let you down If your Heathkit...

Page 3: ...iring Other Wiring 17 Decorating 20 Initial Tests 21 Operation 22 In Case of Difficulty 23 Troubleshooting Chart 24 Specifications 25 Circuit Fundamentals 26 Chassis Photograph 27 Circuit Board X Ray Views 28 Circuit Board Voltage Charts 30 Identification Chart 31 Schematic fold out from page 31 Warranty Inside front cover Customer Service Inside rear cover HEATH COMPANY BENTON HARBOR MICHIGAN 490...

Page 4: ...ly procedures MOS LSI Metal Oxide Semiconductor Large Scale Integration PARTS LIST 27 kS2 red violet 10 orange 82 k 2 gray red 10 orange 91 kS2 5 white brown 10 orange 100 kS2 brown black 10 yellow 180 k12 brown gray 10 yellow Check each part against the following list The key numbers correspond to the numbers in the Parts Pictorial fold out from Page 5 Any part that is packaged in an individual e...

Page 5: ... B5 60 2 2 N DPDT switch 30 B6 75 52 t 6 Switch insulator 10 B7 75 103 1 Fish paper 5 1 2 x 1 7 8 10 B8 75 93 Fish paper 1 x 1 10 B9 75 138 4N Rubber foot 10 B2 417 811 t B2 417 295 6 B2 417 801 2 g i B3 443 601 N 89 44 1 N Line cord 55 DuPont Registered Trademark KEY PART No No Cord Wire Cable cont d 340 11 344 50 1 v 1 347 55 HARDWARE Cl 250 420 7 C2 250 52 3 C3 252 2 C4 254 9 C5 250 276 12 C6 2...

Page 6: ...ders Guide 2 Due to the small foil area around the circuit board holes and the small areas between foils it will be necessary to use the utmost care to prevent solder bridges between adjacent foil areas Use only a minimum amount of solder and use no larger than a 25N watt soldering iron with a small tip Allow it to reach operating temperature and then apply it only long enough to make a good solde...

Page 7: ... against the circuit board and did not move during soldering V 180 kn brown gray yellow L 82 kft gray red orange t 27 ks 2 red violet orange k 100 Id2 brown black yellow 1 27 ks2 red violet orange 1 44 Solder the leads to the foil and cut off the excess lead lengths CONTINUE t 180 Id2 brown gray yellow 1 1 27 Id2 red violet orange t 91 kft 5 white brown orange 1 27 ks 2 red violet orange 1 100 Id2...

Page 8: ...PARTS PICTORI eivrerreq Peo 4 NOTE HEATH PART NUMBERS ARE STAMPED ON MOST DIODES F3 Ca 0 7 7 1 Jl ...

Page 9: ...5 1 55 ARTS PICTORIAL 13 i zac_r ri 4 ...

Page 10: ...ort lead into each pin Then discard the prepared 27 kS2 resistor Angle bracket Use a 4 40 x 1 4 screw a 4 lockwasher and a 4 40 nut CONTINUE NOTE In each of the following steps where a transistor is installed line up the flat on the transistor with the flat on the circuit board and insert the transistor leads into the corresponding E B and C holes in the circuit board Solder each transistor as it ...

Page 11: ...ths CONTINUE 3 22 kS2 red red orange 1 22 kS2 red red orange tv 22 kS2 red red orange kJ 12 k2 5 brown red orange t o 1 1 M2 brown black green Z 1 270 id red violet yellow 1 f 1 1 M12 brown black green t 270 k1 2 red violet yellow V Solder the leads to the foil and cut off the excess lead lengths IN 1 MS2 brown black green i 1 270 kS2 red violet yellow 1 MS2 brown black green 270 kS2 red violet ye...

Page 12: ... HEATH Schlumberger December 5 1973 IMPORTANT NOTICE Please make the following change in your Manual before you start to assemble the kit Page 8 In the right hand column change the sixth step to read 120 k22 brown red yellow Thank you HEATH COMPANY GC 1005 595 1500 3 591 1329 ...

Page 13: ...N4149 diodes 56 56 IV 1 N2071 diode 57 27 at D201 Solder the leads to the foil and cut _ off the excess lead lengths CONTINUE 15 kSl 5 brown green orange 1 27 kS2 red violet orange 4M1 8200 E2 5 gray red red 1 56 kE2 green blue orange N 120 kE2 X brown red yellow t 1 56 kE2 green blue orange 12 k2 5 brown red orange Solder the leads to the foil and ct off the excess lead lengths s 8200 E2 5 gray r...

Page 14: ...W 6 LOCKWASHER NOTE In the following steps you will prepare and install the IC con nectors Read and follow the in structions very closely I lq Cut two 2 strips of twelve 12 IC connectors CONNECTOR STRIP i I e oglo vv v v o 00000 000001 o01 _ 12 CONNECTORS CONTINUE PICTORIAL 2 4 CONTINUE 30 pF mica MPS A20 transistor 417 801 at Q214 11 6111116 0 0 0 0 MPS A20 transistor 417 801 at Q213 67 7 7 7 022...

Page 15: ...the assembled tool plates to remove the connecting bands First bend each band inward and then outward as shown several times if necessary Do not bend the connec tors TOOL PLATES BANDS 6 L J i 1 1 I BEND 1 HERE IC CONNECTORS Cut a 5 1 2 length of 8 wire cable and separate the cable into eight individual wires You will use these wires in the following steps _ 1 SEPARATE f 8 WIRE CABLE NOTE In the fo...

Page 16: ...n the E U S A is 60 Hz Do not perform the E following step unless you live in an area or a foreign country that has a 50 Hz power line frequency E 3 yellow wire from hole BY to hole BZ 3malmmammuommmisassammed NOTE Most clocks indicate up to 12 E hours 0 12 and then repeat Do not perform the following step unless you want your Clock to indicate 24 hour time 0 24 3 1 4 yellow wire from hole AY to h...

Page 17: ...able as shown in Detail 2 7A In the following steps connect the wires of end A of the cable to the circuit board End B will be connected later Violet to hole AL s Orange to hole AE 1 Yellow to hole AF Green to hole AH Blue to hole AG NOTE When you install electrolytic capacitors match the positive marked end with the positive marking on the circuit board 1 0 Dual 20 liF electrolytic Install the ca...

Page 18: ...t board as follows Gray wire to hole H S 1 1 Blue wire to hole F S 1 Cut a 9 1 2 length of 8 wire cable Refer to Detail 2 8B separate the 8 wire cable into two 4 wire cables and prepare the cables as shown Refer to Pictorial 2 8 and connect end A of the short 4 wire cable to the main circuit board as follows Green wire to hole E S 1 Violet wire to hole D S 1 Connect the free wire ends of the long ...

Page 19: ... cables are positioned as shown First insert the four bare wires at K L N and P into their corresponding holes then install a 4 40 x 1 4 screw a 4 lockwasher and a 4 40 nut as shown Next solder the bare wires at K L N and P to the toil and cut off the excess lead lengths Make sure the display circuit board is parallel to the main circuit board That is the display circuit board should be sitting on...

Page 20: ...a spring return switch Use two 6 32 x 3 8 flat head screws and a 6 solder lug and be sure the switch lugs and solder lug are positioned as shown Slide a switch insulator over the switch lugs and bend the lugs as shown in the Pictorial As before mount an SPST switch without spring return at A Use two 6 32 x 3 8 flat head screws and a 6 solder lug Be sure the switch lugs are positioned as shown Then...

Page 21: ...ED ain ter it tail as Set sr GRN EL BRN RED ORG VIOL I MAIN CIRCUIT BOARD1 SHORT 4 WIRE CABLE LONG 4 WIRE CABLE DISPLAY CIRCUIT BOARD BLU 1 SA 5 PICTORIAL 2 9 FISH PAPER1 U T CUT CUT Detail 3 1C move wide N and d the 6 ...

Page 22: ... WRAP AND MAKE A MECHANICALLY SECURE CONNECTION WIRE LUG SMOOTH WIRE 2 THEN SOLDER AS DIRECTED IN THE STEP JBLK dBILK YEL BLK GRN BLK RED INSET 4 1 WIDE FISH PAPER PICTORIAL 4 1 BRN CABII Refer t In the bottom 9 2 1 2 r 2 1 4 41 1 4 0 12 Detail 4 1F FISH PAPER I x I 2 32x1 4 SELF TAPPING SCREW SPEAKER I Detail 4 1B ...

Page 23: ...r solder lugs starting with the solder lug at C Iv Solder this wire to solder lug F and then to the three other lugs The other end of the wire will be connected later route it as shown Refer to Detail 4 1B and install the speaker as shown Use two speaker clamps and two 2 32 x 1 4 self tapping screws Do not overtighten the screws Remove the protective backing from the 1 x 1 piece of fish paper Cent...

Page 24: ... to the inset drawing Connect the smooth line cord wire to lug 1 of terminal strip H NS Make a mechanically secure connection Connect the ribbed line cord wire to lug 2 of terminal strip H NS Make a mechanically secure connection Refer to inset drawing 3 on the Pictorial and slide the sleeving over the 3 16 ampere slow blow fuse as shown Connect the fuse from lug 1 S 2 to lug 3 NS of terminal stri...

Page 25: ...for the following steps NOTE In the following steps you will connect wires coming from the main circuit board to parts mounted on the cabinet bottom Connect the free ends of the 5 wire cable as follows Li Blue wire to lug 2 of switch F S 1 Viblet wire to lug 6 of switch F NS Connect the 1 orange wire from lug 2 of switch E S 1 to lug 5 of switch F S 2 Connect the 1 violet wire from lug 1 of switch...

Page 26: ...self tapping screws Do not overtighten the screws Connect the remaining transformer leads to the main circuit bo d as follows Either red wire to the connector pin at hole X S 1 See inset drawing 1 Other red wire to the connector pin at hole Y S 1 Either green wire to the connector pin at hole Z S 1 Other green wire to the connector pin at hole T S 1 NOTE Be sure the connector pin is not touching t...

Page 27: ... line cord knot is positioned inside the cabinet and the line cord is in the channel provided for it in the cabinet THESE PINS DO NOT GO INTO A CONNECTOR Detail 5 2B Refer to Detail 5 2B and install a display tube at V101 Examine the pins to make sure they are straight except as explained in the previous step before you install the tube As you install each tube watch the leads to make sure each on...

Page 28: ... and the HOURS SET AHEAD switch to the right The tens of minutes will now advance one digit each half second Push the MINUTES and HOURS SET AHEAD switches as necessary until the MINUTES DISPLAY indicates 45 minutes then quickly release the MINUTES SET AHEAD switch Continue holding the HOURS SET AHEAD switch until the HOURS DISPLAY indicates 6 and the AM PM lamp is on indicating AM Then quickly rel...

Page 29: ... Advances the MINUTES DISPLAY one minute each half second TO SET THE ALARM 3 and 4 When used together they advance the MINUTES DISPLAY ten minutes each half second 5 ALARM SET SWITCH Allows you to set the alarm using the HOURS and MINUTES SET AHEAD switches Also allows the display to indicate the time for which the alarm is set Time continues to be kept even though it is not displayed when this sw...

Page 30: ... Remove any solder bridges by a clean hot soldering iron tip between the two that are bridged until the excess solder flows onto the tip Compare your foil pattern against M 7 X Ray Views on Pages 28 and 29 5 Be sure each transistor is in its proper location correct part number and or type number Be sure that each transistor lead is in the right hole and has a good solder connection to the foil 6 C...

Page 31: ... 1_____J HEATH one Ill irl I Ai I Min i ir V I o B if z RED 20 1 0 23 4 _ BLUE AND WHITE LABEL CABINET TOP GRAY BRN FUSE LABEL 1 B 1 1 7 Vt ASS WM Ul VA tan WS o IIMI 1 11 _OT T r r _ r r yr L 11 1 FT el rti Arkirl hrri AT i I 1 1 D I S PLAY TUBE INSET 1 PICTORIAL 5 2 Clock rugged 27 23 rect ach pod ling the r of ion lead Lion asy istor r A any and yften 3ulty I the iiode oned ircuit h the other t...

Page 32: ...HALARM SWITCH 6 ITIME HOLDI SWITCH 1 pj ALARM SET I SWITCH 141 MINUTES SET AHEAD SWITCH pi HOURS SET AHEAD SWITCH 238 Pa Th mal Q1 see pos req I Figure 2 ...

Page 33: ...l six 1 Associated transistor i Q101 digits remains lit or does not turn on through Q107 See above One digit does not light or has 1 Associated transistors Q201 undesired segment glow through Q212 as follov s V101B Q211 Q212 V101A Q209 Q210 V102B 0207 Q208 V102A Q205 Q206 V103B Q203 Q204 V103A Q201 Q202 2 Display tube Interchange tins if tube is bad None of the digits light 1 Diode D201 2 Fuse F30...

Page 34: ... gains time 1 50 Hz jumper wire was installed See Page 11 left hand column step 5 N SPECIFICATIONS Display Six full digits Format 12 or 24 hour Accuracy Determined by accuracy of power line frequency Snooze Alarm Seven minute intervals Power 6 5 watts 120 VAC or 240 VAC 50 Hz or 60 Hz Dimensions 7 wide x 5 deep x 2 1 2 high Weight 3 lbs 4Ill IIIIIP IIIPP The Heath Company reserves the right to dis...

Page 35: ...ght up because they do not have a high enough voltage at their anodes The positive pulse is then applied to D2 and part B of tube V103 receives the high anode voltage At this same time positive pulses are also applied to pins 9 11 12 14 and 15 of the IC This turns on segments a b g e and d and a two is displayed Next positive pulses are applied to D3 and pins 9 10 11 12 13 and 15 of the IC and a s...

Page 36: ...S305 L S304 LS303 SP301 S301 S302 CHASSIS PHOTOGRAPH WARNING Boxed in area indicates hazardous voltage location ...

Page 37: ...ace where the part is installed in the Step by Step instructions and note the Description of the part for example 22 k2 05 juF or 2N2712 B Look up this Description in the Parts List 2 A Note the identification number of the part R number C number etc B Locate the same identification number next to the part on the Schematic The Description of the part will also appear near the part C Look up this D...

Page 38: ... Afw omax km 5 V tunftwo Aft sete 4 if Ira imp 46 AIMAIVeammalwfwammiMag07 MAIN CIRCUIT BOARD Viewed from foil side 77751 Mg7 St WPAMW EFFRP t 4 11 211 Q2Q2 ozzormitaNamiv IgiiiiSMIMON fiV C4AVerenr Mg0 MWOM 76VVO MAIN CIRCUIT BOARD Viewed from component side ...

Page 39: ... Page 30 CIRCUIT BOARD VOLTAGE CHARTS t MAIN CIRCUIT BOARD Viewed from component side All voltages taken with IC201 removed DISPLAY CIRCUIT BOARD Viewed from component side ...

Page 40: ...BER d 1 b 2 c 3 1 4 e 5 f 6 7 DECIMAL 8 NOT USED ANODE 9 10 NOT USED 0201 Q203 Q2050207 Q209 0211 Q213 0214 MPS A20 ISIPI 0202 Q204 Q206 Q208 0210 0212 MPS L51 0101 0107 417 811 MPS 1 01 ZD201 c 25 1N4166A ZENER DIODE 15V 17 mA NOTE HEATH PART NUMBERS ARE STAMPED ON MOST DIODES lir OR OR OR D204 D211 1N4149 SILICON DIODE 75V 10mA D201 1N2071 SILICON DIODE 600V IA 0202 0203 1N4002 SILICON DIODE 100...

Page 41: ... wareo o 0 0 5 050 Kg 0 111M111011 DMA IC 201 MA 5017 AA SCHEMATIC OF THE HEATHKIT ELECTRONIC CLOCK MODEL GC 1005 NOTES ALL RESISTOR VALUES ARE IN OHMS K 100D m 1 000 000 2 ALL CAPACITOR VA_UES ARE IN NT ULIESS MARKED OTHERV ISE U THIS STTUB CONNECTIO 5 m1l 11S SYMBI A HIGH INP INDICATED ARE TAKEN D6 DS Dt Ei 62 ...

Page 42: ...Y CIRCUIT BOARD 4 THIS THIS SYMBOL INDICATES A LETTERED CIRCUIT BOARD CONNECTION 5 MTHIS SYMBOL INDICATES A DC VOLTAGE MEASURED WITH A HIGH INPUT IMPEDANCE VOLTMETER FROM THE POINT INDICATED TO GROUND VOLTAGES MAY VARY 10 AND ARE TAKEN WITH IC201 REMOVED B 0 0000 tM 270 C701 iM ...

Page 43: ...s specifically requested by our Consultants Hints Telephone traffic is lightest at midweek please be sure your Manual and notes are on hand when you call Heathkit Electronic Center facilities are also available for telephone or walk in personal assistance REPAIR SERVICE Service facilities are available if they are needed to repair your completed kit Kits that have been modified soldered with paste...

Page 44: ...HEATH Schlumberger Nummissmine2 I HEATH COMPANY BENTON HARBOR MICHIGAN THE WORLD S FINEST ELECTRONIC EQUIPMENT IN KIT FORM LITHO IN U S A ...

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