Heathkit IO-4205 Manual Download

Page: 1 / 208

Summary of Contents for IO-4205

Page 1: ...HEATHKIT MANUAL 5 Megahertz Dual Trace Oscilloscope Model 10 4205 595 2072 _ 7 _ 0 L HEATH COMPANY BENTON HARBOR MICHIGAN ...

Page 2: ...ing the first ninety 90 days after purchase our products when correctly assembled calibrated adjusted and used in accordance with our printed instructions will meet published specifications If a defective part or error in design has caused your Heathkit product to malfunction during the warranty period through no fault of yours we will service it free upon proof of purchase and delivery at your ex...

Page 3: ...t Manual HEATH COMPANY for the 5 Megahertz Dual Trace Oscilloscope Model 10 4205 595 2072 BENTON HARBOR MICHIGAN 490 2 2 Copyright 1978 Heath Company All Rights Reserved Printed in the United States of America ...

Page 4: ... 0 0 0 0 0 0 0 0 0 59 Step by Step Assembly 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 61 INITIAL TESTS 0 0 0 0 0 0 0 0 o 0 o o o 0 0 0 0 0 0 0 0 o o o o o o o 0 o 80 CALIBRATION 0 0 0 0 0 0 0 0 0 0 o o o 0 0 o 0 0 0 0 0 0 o o o o 0 0 0 0 82 FINAL ASSEMBLY o o 0 0 0 0 0 0 0 o o 0 0 o 0 0 0 0 0 o o o 0 0 0 0 88 OPERATION 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 o 0 0 o o o 0 0 0 0 0 0 o 0 89 IN CASE OF DIFFI...

Page 5: ...cy and capabilities that are usually found only in higher priced oscilloscopes Among the many other features this Oscilloscope of fers are A special TV position on the trigger selector This allows low frequencies to pass while rejecting high frequencies thus making it Page 3 easier to trigger on the vertical frequency of a TV set A 10 to 1 attenuation circuit that can be used for signals applied t...

Page 6: ...s it is needed All other parts in the shipping carton will be consid ered the final pack Caution Do not remove any parts from their bags or the final pack until they are specifically called for in a Parts List in the Manual Each assembly section ofthe Manual contains its own Parts List and Step by Step Assembly instruc tions At the beginning of each Parts List you will be instructed to open one of...

Page 7: ...d Picto rials and Details Pictorials show the overall op eration for a group of assembly steps Details generally illustrate a single step When you are directed to refer to a certain Pictorial for the following steps continue using that Pictorial until you are referred to another Pictorial for another group of steps 3 4 5 Most kits use a separate Illustration Booklet that contains illustrations Pic...

Page 8: ...yes SOLDERING Soldering is one ofthe most important operations you will perform while assembling your kit A good sol der connection will form an electrical connection be tween two parts such as a component lead and a circuit board foil A bad solder connection could pre vent an otherwise well assembled kit from operating properly It is easy to make a good solder connection if you follow a few simpl...

Page 9: ...eir capacitance value in JLF microfarads or pF picofarads and type ceramic Mylar electrolytic etc Some capacitors may have their value printed in the following man ner Digit Color Multiplier 0 Black 1 1 Brown 10 2 Red 100 3 Orange 1 000 4 Yellow 10 000 5 Green 100 000 6 Blue 1 000 000 7 Silver 0 01 8 Gold 0 1 9 EXAMPLES 151K 15 X 10 150 pF 759 75 X0 1 7 5 pF Tolerance Color Tolerance Silver 10 Gol...

Page 10: ...159A R159B R164A R164B R166 R168 R174 R175 A1 6 220 4 22 n Red Red Bik R147A R147B R148A R148B Some parts are marked with a 171 or 172 pack aging number These numbers are used for packaging purposes only and do not appear in the Manual Parts List To order a replacement part always include the PART NUMBER Use the Parts Order Form furnished with the kit If one is not available see Replacement Parts ...

Page 11: ...1 6 153 2 15 kfi 8rn Grn Org R132A R1328 Trimmer A1 6 223 22 kfi Red Red Org R169 A1 6 913 2 91 kfi Wht 8rn Org R102A R1028 84 31 56 4 1 5 20 pF C101A C1018 A1 6 104 2 100 kfi 8rn 81k Yel R107A R0178 C103A C1038 A1 6 914 2 910 kfi Wht 8rn Yel R101A R1018 84 31 54 2 4 40 pF C102A C1028 84 31 52 4 8 60 pF C104A C1048 C115A C1158 Other Resistors 85 31 77 2 80 400 pF C106A C1068 6 1801 t j A2 4 1800 n...

Page 12: ...1 U102 DID 1 10 5 DIDZ AJ l Z S R112A R112B R152A R152B R189 R143A R143B R138A R138B R4A R4B SW1A SW1B SW3 SW2A R3A SW2B R3B 3 KEY HEATH QTY DESCRIPTION No Part No 6 Hardware G1 250 1282 3 6 32 x 1 8 black setscrew G2 250 33 4 6 32 x 1 8 setscrew G3 250 416 4 6 32 x 1 4 flat head screw G4 250 56 4 6 32 x 1 4 screw G5 252 3 4 6 32 nut G6 254 1 4 6 lockwasher Other Hardware H1 253 50 2 1 4 plastic s...

Page 13: ... be positioned either way Press the resistor against the cir cuit board Then bend the leads outward slightly to hold the resis tor in place STEP BY STEP ASSEMBLY Page 11 IDENTIFICATION DRAWING CONTINUE The steps performed in this Pictorial are in this area of the circuit board PICTORIAL 1 1 Turn the circuit board over and solder the resistor leads to the foil as follows 1 Push the soldering iron t...

Page 14: ...al solder to obtain a good connec I Lc c r _ _____________ _ ______________ J SOLDER BRIDGES A solder bridge between two adjacent foils is shown in photograph A Photograph B shows how the con nection should appear A solder bridge may occur if you accidentally touch an adjacent previously sol dered connection if you use too much solder or if you drag the soldering iron across other foils as you rem...

Page 15: ...ERLY IF IT IS INSTALLED BACKWARDS See Detail 1 2A BAN NO BAND GLASS BODY COLORED END If your diode has a solid body the band is clearly defined If your diode has a glass body do not mistake the colored end inside the diode for the banded end Look for a band painted on the outside of the glass PART NUMRER PICTORIAL 1 2 Page 4 of 5 10 4205 595 2072 591 3025 IDENTIFICATION DRAWING Page 13 07B 100 kfl...

Page 16: ...8 I 3 8 I 8 I 1 8 1 I I I I I I I I I I I iif l jiill 0 e 1 CM 2 3 4 e I I I I I I I I I 8 7 I IDENTIFICATION DRAWING PART NUMBER c r l I I I I I I I I I I I I I I PICTORIAL 1 3 3 4 I I I I I I I I I I I I I I II I I I 8 10 12 CONTINUEO IDENTIFIC DRAWl I I NOTE When a wire is called for in a step cut the brown wire to the specified length Then remove 1 4 of insulation from each end 5 I 2 1 4 Brn w...

Page 17: ...Gry Red 1000 0 Brn Blk Red 1800 0 Brn Gry Red Solder the leads to the foil and cut off the excess lead lengths PICTORIAL 1 4 IDENTIFICATION DRAWING Page 15 82 0 Gry Red Blk 1000 0 Brn Blk Red 82 0 Gry Red Blk R154A 10 0 Brn Blk Blk R147A 22 0 Red Red Blk Solder the leads to the foil and cut off the excess lead lengths ...

Page 18: ...1000 n Brn Blk Red R155A 1200 fi Brn Red Red R151A 39 fi Org Wht Blk R154A 10 k l Brn Blk Org Solder the leads to the foil and cut off the excess lead lengths PICTORIAL 1 5 PART NUMBER R154B 10 k l Brn Blk Org R187 1000 fi Brn Blk Red D111B 1N4149 diode 56 56 R159B 10 n Brn Blk Blk YSolder the leads to the foil and cut off the excess lead lengths J Solder the leads to the foil and cut off the exce...

Page 19: ...lk Blk Solder the leads to the foil and cut off the excess lead lengths O y y 1 I1 8 I aI 5 B I 7ta I l i flj lll ij I I I Q 5 1 CM 2 INCHES I I I I I I I 3 2 I I I I I I lL ____ PICTORIAL 1 6 3 4 I I I I I I I I I I I I I I 8 9 10 in this area of the circuit board I I I I I I I I 12 2 7 n Red Viol Gold 2 7 n Red Viol Gold 79 2 7 n Red Viol Gold VR10A diode 56 67 9 22 kn Red Red Org Solder the lea...

Page 20: ...nstall an IC socket insert the pins into the circuit b oard holes The index mark on the circuit board must still be visible after the socket is installed IC socket at QlOlA in IC socket at Q102A in IC socket at U102 14 pin IC socket at U101 Q nc I PART NUMBER PICTORIAL 1 7 CONTI NU Ev NOTE When you install a control in sert the pins into the circuit board holes and solder them to the foil 1 ip i 1...

Page 21: ...t board slots Solder both sides of the end leaves to the foil as you install each trimmer All the leaves must be soldered Then cut off the excess leaf lengths SO LDE R CIRCUIT BOARD 4 40 pF trimmer 31 54 4 40 pFtrimmer 31 54 5 20 pF trimmer 31 8 60 pFtrimmer 31 52 8 60 pF trimmer 31 52 f 1 I 1 Jom PICTORIAL 1 8 Page 19 IDENTIFICATION DRAWING PART NUMBER ...

Page 22: ... transistor 417 293 SE6020 transistor 417 vl Q114 SE6020 transistor 417 237 IDENTIFICATION DRAWING PART NUMBER The steps performed in this Pictorial are in this area of the circuit board PICTORIAL 1 9 II CONTINUEO NOTE In the following four steps in stall each of the transistors as follows 1 Refer to the illustration example below and identify theE B and C leads of the transistor 2 Insert the tran...

Page 23: ...ts flat with the flat on the board Insert the leads into their correct E B and C holes Position the transistor 1 4 above the board Then solder the leads to the foil and cut off the excess lead lengths Q103B MPSA 20 transistor 417 801 06B 2N4121 transistor 417 235 transistor 109B 2N4121 transistor 417 235 Q111B 2N5770 transistor 417 293 112B 2N5770 transistor 417 293 1 Q108B 2N41 21 transistor 417 ...

Page 24: ...always match the positive mark on the capacitor with the positive mark on the circuit board OR match the minus mark on the capacitor with the minus mark on the circuit board V Solder the leads to the foil and cut off the excess lead lengths The steps performed in this Pictorial are in this area of the circuit board IDENTIFICATION DRAWING PART NUMBER I I I I I 7 2 I 8 N1o Do I PICTORIAL 1 11 ...

Page 25: ...ss lead lengths C128 0011J F ceramic C129 001 ILF ceramic t C121 100 pF ceramic C131 0033 ILF ceramic C135 005 ILF ceramic C136 005 ILF ceramic C124 02 ILF ceramic older the leads to the foil and cut off the excess lead lengths PART NUMBER The steps performed in this Pictorial are in this area of the circuit board PICTORIAL 1 12 Page 23 ...

Page 26: ...ch trimmer All the leaves must be soldered C106A 80 400 pF trimmer 31 77 C106B 80 400 pF trimmer 31 77 18A 100 JLF electrolytic C118B 100 JLF electrolytic C119A 100 JLF electrolytic C126 250 ILF electrolytic C133 10 JLF electrolytic Solder the leads to the foil and cut off the excess lead lengths 10 JLF electrolytic 4 10 JLF electrolytic 7 250 JLF electrolytic 2 10 JLF electrolytic Solder the lead...

Page 27: ...watt Red Red you are instructed to mount a resistor 3 16 above the circuit board as shown use a 1 x 1 piece of 3 16 cardboard from shipping carton for a spacer After the leads are sol dered remove the cardboard spacer 1 X 1 or CARDBOARD SPACER R178 20000 5 watt 3 16 above board R177 20000 5 watt 3 16 above board IDENTIFICATION DRAWING PART NUMBER The steps performed in this Pictorial are in this a...

Page 28: ...es in the circuit board SMALL ulf DOT PIN1 PIN1 PIN 2 Fit the pins of each switch wafer one wafer at a time into their board holes until all the switch and control pins are in place Then push the switch down tight against the circuit board 3 Carefully turn the circuit board over and solder only the end pins of each wafer to the foil In spect these switch pins to make sure all the pins are tight ag...

Page 29: ... length of sleeving on each lead of a 33 0 1 2 watt Org Org Blk 5 resistor R2A Connect this resistor to switch SW2A be tween wafer A lug 9 NS and wafer B lug 8 S 1 R106A Connect a 33 0 1 2 watt Org Org Blk 5 resistor from the indicated resistor outline in the circuit board S 1 to switch SW2A wafer B lug 9 S 1 onnect a 3 Brn wire from circuit board hole CC S 1 to switch SW2B wafer A lug 9 NS Positi...

Page 30: ...nstall the hardware Use the plastic nut starter fur nished with the kit to pick up 4 and 6 nuts and start them on screws SW3 Push either tab of a DP4T 4 position slide switch into the slot at location SW3 in the switch bracket Secure the other tab of the switch with 4 40 x 1 4 flat head hardware Now bend the switch tab that is in the slot flat against the bend in the switch bracket See inset drawi...

Page 31: ...he 13 1 2 length of 4 conductor flat cable 0 y y INCHES 2 3 11 8I 3 8 I 5fe I 718 I I I I I I I I I I I I I I I 0 I I I I I I I I I iihjlilij 0 5 1 C M 2 3 5 8 I Page 29 MARK WITH INK MARK WITH INK I II 9 NOTE Where a wire passes through a connection and goes to another point it will count as two wires in the solder instructions S 2 one entering and one leav ing the connection Be sure when you sol...

Page 32: ...wo 33 0 1 2 watt Org Org Blk 5 resistors the circuit board as follows Org to hole T S 1 Brn to hole P S 1 Yel to holeS S 1 Red to hole X S 1 Prepare two 1 3 4 brown wires Connect a 1 3 4 Brn wire from switch SW1A lug 7 S 1 to circuit board hole B S 1 0 y Y 3f 1 INCHES 2 3 I1 8 I 3f8 I 5 8 I 7 8 I I I I I I I iifljiiiif I I I I I I I I I I I I I I I I I I I I 0 5 1 C M 2 3 5 6 8 I I I I 9 vJ R1A Co...

Page 33: ...rdware Be sure the beveled edges of the transistor are positioned as shown Page 31 Detail 1 170 In the same manner install another MPSU10 transistor 417 834 on a heat sink Q115 Place a short ferrite bead on the center lead of one of these transistors Insert theE B and C leads of the transistor into their corre sponding E B and C holes in the circuit board at location Q115 Secure the heat sink to t...

Page 34: ...o the foil side of a circuit board keep the insulation on the wire 1 8 above the foil to be sure you get a good solder connec tion to the wire and circuit board foil Connect a 2 Brn wire from control R4B lug 2 S 1 to the indicated hole in the circuit board S 1 2 Connect a 2 Brn wire from control R4A lug 2 S 1 to the indicated hole in the circuit board S 1 CIRCUIT BOARD CHECKOUT Carefully inspect t...

Page 35: ...6 391 1 390 1 Org Wht Brn R229 A1 6 511 2 510 1 Grn Brn Brn R206 R207 A1 6 561 2 560 1 Grn Biu Brn R235 R258 A1 6 821 820 1 Gry Red Brn R217 To order a replacement part always include the PART NUMBER Use the Parts Order Form furnished with the kit If one is not available see Replacement Parts inside the rear cover For prices refer to the separate Heath Parts Price List KEY HEATH QTY DESCRIPTION CI...

Page 36: ...1 21 56 1 470 pF C214 letters or numbers on an IC are not significant 81 21 36 3 002 JLF C211 C218 3 Part number and type number C229 4 Part number with a type number other than the one 81 21 16 2 01 JLF C202 C224 listed 81 21 82 1 02 JLF C210 81 21 199 3 1 JLF C209 C228 C232 E1 417 134 5 MPS6520 transistor 0209 0210 0212 0213 Tantalum Electrolytic 0217 E2 417 154 1 2N2369 transistor 0216 C1 25 22...

Page 37: ...11 344 51 6 8 Brn wire 344 163 2 Blk wire HARDWARE 344 165 1 Red wire 344 166 1 Org wire G1 250 52 2 4 40 x 1 4 screw 344 167 1 Vel wire G2 250 186 4 4 x 3 8 screw 344 168 1 Grn wire G3 252 15 2 4 40 nut 344 56 2 Blu wire G4 254 9 2 4 lockwasher 344 170 1 Viol wire 344 58 2 Gry wire MISCELLANEOUS 344 172 1 Wht wire 344 173 1 Wht Bik wire H1 434 230 3 8 pin IC socket 344 174 1 Wht Brn wire 344 175 ...

Page 38: ...ess lead lengths 1 bare wire bare wire 1 bare wire 1 1 8 Brn wire 1 5 8 Brn wire 1 1 8 Brn wire Solder the leads to the foil and cut off the excess lead lengths INCHES 2 II II IiII i I I I I I I I Q 5 1 CM 2 3 I e I I I I I I e PICTORIAL 2 1 3 I I 7 8 I I I I I 9 4 I I I 10 11 IDENTIFICATION DRAWING PART NUMBER 1 1 8 Brn wire 1 3 4 Brn wire 1 5 8 Brn wire 1 3 8 Brn wire Solder the leads to the foi...

Page 39: ... 67 v 0208 1N4149 diode 56 56 ij 0207 1N4149 diode 56 56 0213 1N4149 diode 56 56 1 3 8 Brn wire I Solder the leads to the foil and cut off the excess lead lengths PICTORIAL 2 2 IDENTIFICATION DRAWING PART NUMBER Page 37 I D209 1N4149 diode 56 56 0210 1N4149 diode 56 56 Solder the leads to the foil and cut off the excess lead lengths 2Z D ...

Page 40: ... Red Viol Gold R278 1000 0 Brn Blk Red R227 1000 0 Brn Blk Red Solder the leads to the foil and cut off the excess lead lengths PICTORIAL 2 3 IDENTIFICATION DRAWING PART NUMBER 1000 n Brn Blk Red R205 1800 0 Brn Gry Red R210 15 kn Brn Grn Org R209 330 n Org Org Brn R214 47 0 Yel Viol Blk 1000 0 Brn Blk Red Solder the leads to the foil and cut the excess lead lengths R217 820 0 Gry Red Brn R242 910...

Page 41: ...n Blk Blk Solder the leads to the foil and cut off the excess lead lengths Page 39 l A The steps performed in this Pictorial are in this area of the circuit board II PICTORIAL 2 4 16 1000 pF polystyrene Match the band colored end on the capacitor with the band on the circuit board R225 68 kn Blu Gry Org R226 6800 l Blu Gry Red 1000 l Brn Blk Red 220 n Red Red Brn _ A 10 MD Brn Blk Blu 100 kn Brn B...

Page 42: ...er the pins of each part to the foil as each part is installed J 8 pin IC socket at Q201 v Y8 pin IC socket at Q207 8 pin IC socket at Q208 14 pin IC socket at 0205 14 pin IC socket at 0201 14 pin IC socket at 0203 R236 1000 l 1 k control 10 391 I PICTORIAL 2 5 ...

Page 43: ...I I lengths LOCATIN t TAB f G J II a transistor h You msta b ard NO TE W en fl t on the o th the a E B align its flat into their cor ect 4 rt the lea s h transistor InsdeCholes Position t e lder the leads an b d Then so lead bove the oar ff the excess a f I and cut o to the 01 lengths FLA T fE RI OR f 1 4 l f Ji 417 tl MPSA20 transistor Q202 801 Q203 2 235 417 N4121 transistor Q206 M 417 PSA20 tra...

Page 44: ...ll a polarized electrolytic capacitor always match the positive mark on the capacitor with the positive mark on the cir cuit board OR match the minus mark on the capacitor with the minus mark on the circuit board C225 10 JLF electrolytic C234 10 JLF electrolytic C217 10 JLF electrolytic vf C227 10 JLF electrolytic Solder the leads to the foil and cut off the excess lead lengths n_ PART NUMBER C207...

Page 45: ... J LF NP electrolytic C224 01 J LF ceramic Solder the leads to the foil and cut off the excess lead lengths PICTORIAL 2 8 Page 43 CONTINUEO rrC215 1 J LF film Match the band on the capacitor with the band on the circuit board 12 100 pF ceramic 680 0 1 watt Blu Gry 33 22 kO 2 watt C222 200 pF ceramic 5600 0 2 watt Grn Blu 5600 0 2 watt Grn Blu Solder the leads to the foil and cut off the excess lea...

Page 46: ...TE Solder the pins to the foil as each part is installed R211 5000 n 5 k control 10 904 R231 500 n control 10 918 R247 500 n control 10 918 J R251 2000fi 2 k control 10 398 R257 1000 n 1 k control 10 936 PICTORIAL 2 9 ...

Page 47: ...ated circuit or tran sistor PIN l J ND kr 1 l f f J LI i SMALL I PIN 1 f PIN l Pllll Q201 5566 transistor 417 902 Q207 5566 transistor 417 902 Q2oa 5566 transistor 417 902 0202 74132 IC 443 625 0204 7413 IC 443 44 0205 74121 IC 443 22 0201 7474 IC 443 6 0203 74122 IC 443 23 Page 45 I PICTORIAL 2 10 ...

Page 48: ...e circuit board Ifthey are not reheat the connection and push the switch tight against the board Then solder all the remaining switch and control pins to the foil 0 y Y2 a INCHES 2 3 I 1 8 I 3 8 I 5re I 7 8 I I I I I I I I I I I I I I I I I I I I I I I I I II IIit I 0 5 1 CM 2 3 5 6 8 I I I I 9 J Prepare the following brown wires 3 1 4 3 1 4 2 3 1 4 2 1 4 4 1 4 2 Remove an extra 1 2 of insulation ...

Page 49: ...t a 1000 0 1 2 watt Brn Blk Red resistor from switch SW5 wafer E lug 5 S 1 to control Rll lug 1 S 1 Use a 5 8 length of sleeving on each lead 4Refer to Detail 2 11B and prethread the two grooves in the bottom of both heat sinks Use a 4 X 3 8 screw V Refer to Detail 2 11B and install an MPSU10 transistor 417 834 on a heat sink with 4 40 x 1 4 hardware Be sure the beveled edges of the transistor are...

Page 50: ...rn wire to hole E S 1 12 Wht Org wire to hole F S 1 12 Wht Red wire to holeD S 1 12 Wht wire to hole G S 1 Remove an extra 1 2 of insulation from only one end total 3 4 of the remaining blue and gray prepared wires Pass the longer bared end of each wire through the ferrite bead in the next two steps Connect only one end of the two following wires to the foil side of the horizontal circuit board Th...

Page 51: ...ORG L K OL T BL U RED WHT VIOL WHT YEL WHT GRY WHT BR N F WHT GRN GRN WHT OR G WHT RED WHT PICTORIAL 2 12 Page 49 BLU GRY ...

Page 52: ...d Red R317 A1 6 432 4300 fi Vei Org Red R334 A1 6 472 4700 n Vel Viol Red R315 A1 6 562 1 5600 n Grn 81u Red R316 A1 6 682 2 6800 fi 81u Gry Red R335 R336 A1 6 103 10 k l 8rn 81k Org R331 A1 6 123 1 12 k l 8rn Red Org R326 A1 6 153 2 15 k l 8rn Grn Org R328 R329 A1 6 183 18 k l 8rn Gry Org R321 A1 6 273 27 kfi Red Vioi Org R327 A1 6 473 2 47 k l Vei Vioi Org R318 R338 To order a replacement part s...

Page 53: ...S INTEGRATED CIRCUITS IC s NOTE Transistors and integrated circuits are marked for iden tification in one of the following four ways 01 01 01 02 02 1 Part number 2 Type number On integrated circuits this refers only to the numbers and letters listed Any additional letters or numbers on an IC are not significant 3 Part number and type number 4 Part number with a type number other than the one liste...

Page 54: ... 8I 3 8 I S B I I 7 8 1 I I I ii iljii ii I I I I I I I I 0 1 CM 2 3 STEP BY STEP ASSEMBLY I I I I II I e 7 The steps performed in this Pictorial are in this area of the circuit board PICTORIAL 3 1 3 4 I I I I I I II I I I I I I I II I I I I 8 10 11 12 5 I I IDENTIFICATION DRAWING 17 2200 n Red Red Red the leads to the foil and cut off the excess lead lengths 4300 n Yel Org Red 0306 1N2071 diode 5...

Page 55: ...1 diode 57 27 0309 1N2071 diode 57 27 0308 1N2071 diode 57 27 0307 1N2071 diode 57 27 Solder the leads to the foil and cut off the excess lead lengths PICTORIAL 3 2 IDENTIFICATION DRAWING Page 53 r l JJ Is 342 1800 n Brn Gry Red R332 470 n Yel Viol Brn IA R333 100 k l Brn Blk Yel Solder the leads to the foil and cut off the excess lead lengths 0301 007 diode 57 52 R324 470 k l Yel Viol Yel 2 1N414...

Page 56: ...der the leads to the foil and cut off the excess lead lengths FLA TIE i i MPSL01 transistor 417 MPSL01 transistor 417 8 MPSL51 transistor 417 295 Q302 SE6020 transistor 417 237 Q301 SE6020 transistor 417 37 Q307 MPSL01 transistor 417 811 3 watt 2 watt Org Wht R308 220 kfl 1 watt Red Red Yel 2 2 n 2 watt Red Red R310 470 kfl 1 watt Yel Viol Yel Solder the leads to the foil and cut off the excess le...

Page 57: ...nstall a tantalum capacitor match the positive mark or color dot on the capacitor with the positive mark on the circuit board C311 1 5 LF tantalum C310 1 5 ILF tantalum C314 500 pF ceramic C315 500 pF ceramic Solder the leads to the foil and cut off the excess lead lengths Page 55 PICTORIAL 3 4 ...

Page 58: ...aper C320 25 JLF electrolytic Match the positive mark on the capacitor with the positive mark on the board or match the negative mark on the capacitor with the negative mark on the board 1 C306 1200 JLF electrolytic C304 1200 JLF electrolytic Solder the leads to the foil and cut off the excess lead lengths Refer to Detail3 5A and install the six cable ties through the circuit board holes and aroun...

Page 59: ...oard Then press the IC tight against the board but do not solder its pins at this time r Refer to Detail 3 6A and mount a heat sink at location U303 with 3 48 x 1 4 hardware Be sure to position the heat sink as shown in Picto rial 3 6 i Now solder the pins ofthe IC to the foil and cut off the excess pin lengths U301 In the same manner install a UA78 IC 442 617 and a heat sink at location U301 Posi...

Page 60: ...rotruding leads which could touch together Transistors for proper type and installation Electrolytic capacitors for the correct position of the positive end Diodes for the proper type and the correct posi tion of the banded end IC s for proper type and installation There are a number of unused holes in the circuit board which will be used later Set the circuit board aside temporarily ...

Page 61: ...ctrolytic capacitor C3 A 8 C A7 54 953 Power transformer T1 AB 60 2 1 DPDT 2 position slide switch SW9 A9 60 4 2 SPOT 2 position slide switch sw7 SW8 A10 60 54 DPDT 120V 240V SW10 slide switch A11 60 73 DP3T 3 position slide switch SW6 A12 60 624 DP4T 4 position slide switch SW4 411 815 5DEP31 F cathode ray V1 tube CRT To order a replacement part see Replacement Parts inside the rear cover For pri...

Page 62: ... lockwasher G4 75 52 Slide switch insulator C15 255 63 3 6 32 x 2 threaded spacer G5 75 754 Line cord strain relief C16 259 1 3 6 solder lug G6 75 771 4 Slide switch cover 2 1 2 1 92 609 Cabinet shell 8 Hardware G7 92 679 Cabinet front 211 49 Handle 01 250 1138 8 8 x 5 8 hex washer G8 260 16 2 Alligator clip head screw G9 261 1 3 Foot 02 254 4 4 8 32 nut G10 266 991 4 Plastic spacer 03 252 68 8 8 ...

Page 63: ... PLACE Detail 4 1A In the same manner install plastic grommets in the following chassis holes c B NOTE Use the flat head screws only when flat head hardware is specifically called for in a step ft 6 32 X 3 16 SCREW Detail 4 1B Refer to Detail 4 1B and mount a 6 solder lug on top of the chassis at location K with a 6 32 x 3 16 screw and a 6 32 nut Position the solder lug as shown Refer to Detail4 1...

Page 64: ...t side of the nut is on the bottom of the chassis Do not use the two 6 32 push on nuts at this time In the same manner install8 32 push on nuts at v locations J L and M Install an 8 32 push on nut at location T with the flat side ofthe nut on the rear outside ofthe chassis In the same manner install8 32 push on nuts at locations U X andY on the rear of the chassis Detail 4 tE K Refer to Detail 4 1...

Page 65: ...e bottom of the chassis at location F1 with 32 x 3 8 hardware Refer to Detail4 1J and mount a CRT cathode ray tube bracket on the top of the chassis at either of the V1 locations Use 6 32 x 3 8 hardware In the same manner install the other CRT bracket at the remaining V1 location I f Install a 6 32 push on nut on the top of each CRT bracket Be sure that the flat side of each nut is up and that eac...

Page 66: ...e transformer so the proper color wires are located as shown RefertoP 1orial4 2 Illustration Booklet Page 12 for the f owing steps Refer to Detail 4 2A and install the pilot lamp lens in hole PL1 in the chassis with a 5 16 push on nut Be sure the slot in the lens is positioned as shown before you push the nut tight against the chassis v pLl Push the pilot lamp all the way into the pilot lamp lens ...

Page 67: ...plit bearing furnished with the verti cal circuit board parts in hole R4A The wide side of the bearing must be on the inside of the chassis the same manner install a split bearing in hole R4B Refer to Pictorial4 3 Illustration Booklet Page 13 for the follcSwing steps l Turn the chassis over and position it as shown Locate the harness and position it on the chassis with the wires from the various b...

Page 68: ...ition this resistor directly above the capacitor lugs la ea 5 8 length of sleeving on each lead of a 270 n 3 watt resistor Y R 15 Connect this resistor to capacitor C3 be tween lugs 2 S 4 and 3 S 2 Position this resistor 1 2 above the chassis INCHES 2 3 Refer to Pictorial4 5 Illustration Booklet Page 14 for the following steps Locate the power supply circuit board and posi f tion it as shown Conne...

Page 69: ...supply circuit board as follows y Large Wht Yellead to hole AB S 1 Either large Yellead to hole E S 1 Otherlarge Yellead to hole C S 1 arge Wht Brn lead to hole I S 1 V Large Wht lead to hole H S 1 Either large Red lead to hole F S 1 Other large Red lead to hole G S 1 Either large Brn lead to hole A S 1 other large Brn lead to hole B S 1 l L z c This completeS me wiring to the po er supply circuit...

Page 70: ...this cable it will be connected later reparethe ends of an 8 Gry wire and an 8 Blu e f onnect one end of an 8 Gry wire in hole Y2 in the vertical circuit board S 1 The other end will be connected later Connect one end of an 8 Blu wire in hole Y1 in the vertical circuit board S 1 The other end will be connected later Position the vertical circuit board on the chassis as shown in Pictorial 4 7 Conne...

Page 71: ...torial4 8 Pull the cable tie tight and cut off its excess 0 1 INCHES 2 3 11 e I a e I e I 7 8 I I I I I I I I I I I I I I I I I rilijiiil I I I I I I I I I I 0 1 CM 2 3 I I I I Remove the protective backing from the DANGER label and press the label in place on the chassis at the location shown near the power supply circuit board Set the chassis aside temporarily 1 2 S Refer to Pictorial4 9 Illustr...

Page 72: ...ious note 0 4 Temporarily lay the front panel adhesive side up on your work area Position the cabinet front as shown in Pictorial 4 9 o INCHES 2 3 I1 8 I 3 8 I 5 a I 7 8 I I I I I I I I I I I I I I I I I I I I I I I I 0 5 1 CM 2 3 5 e 8 I I I I 9 Fit the 6 32 x 3 8 T bolt into the indicated 1 square recess in the cabinet front Place a 2 1 2 slide switch cover in each of the recessed areas at switc...

Page 73: ...lowing steps itthe cabinet front onto the front ofthe chassis Be sure all the switches and the T bolt fit prop erly into their slots and holes Install 3 8 flat washers and 3 8 32 nuts on ro tary switches SW2A and SW2B Install a 6 lockwasher and a 6 32 nut on the T bolt at hole A in the chassis front R8 Mount a 1000 0 1k control 10 1118 at location R8 with a 3 8 lockwasher 3 8 flat washer and a 3 8...

Page 74: ...mmet BG and connect its leads as follows All three connections must be mechanically secure I I I 0 5 1 CM 2 INCHES II I I 1 2 I I I II II I s 3 I I I I I I I I 8 1 Gril to solder lug P S 1 I Blk lead to fuse block F1 lug 1 S 1 Wht lead to switch SW10 lug 6 S 2 ALTERNATE LINE VOLTAGE OPERATION This Oscilloscope can be operated on either 120 VAC or 240 VAC line voltage In the United States 120 VAG i...

Page 75: ...PICTORIAL 4 12 _ Detail 4 12B Page 73 ...

Page 76: ...lder lug K NS INCHE S 3 Connect the free end of the Wht Red wire corn ing from grommet BB to pilot lamp PL1 lug 3 NS Prepare a 2 1 2 black wire and a 6 1 2 black wire J Connect a 2 1 2 Blk wire from switch SW8lug 3 S 1 to solder lug K NS Connect a 6 1 2 Blk wire from pilot lamp PL1 lug 1 NS to solder lug K NS Connect one lead of the pilot lamp to PL1lug 1 S 2 Connect the other lead of the pilot la...

Page 77: ...zontal cir cuit board to the chassis as follows Blk wire to solder lug K S 4 Brn wire through grommet BB tosocketJ6 S 1 This completes the wiring to the horizontal circuit board Check to see that all connections are soldered and then cut offall the excess wire lengths close to the foil The remaining Blu and Gry wires connected to the circuit board will be connected later Carefully position all the...

Page 78: ...e shaft coupling on control R4B so the shaft extends 5 16 outside the front panel Tighten the setscrew in the shaft coupling In the same manner install a 5 extension shaft through the proper hole in the front panel and into the shaft coupling on control R4A Locate the graticule and remove the protective backing There may also be a protective film on the face ofthe graticule which must be removed a...

Page 79: ...he front panel bracket and into the to the CRT socket lug 6 S 1 cab net front Ifnecesary reposition the front panel bracket so the front panel is perpendicular to the top ofthe chassis Then tighten the screws at holes D and E Re er to Pictorial 4 18 for the following steps Refer to the inset drawing on Pictorial 4 18 and install a rubber foot in each of the three indi cated holes in the CRT shield...

Page 80: ...ircuit board parts Turn the Y1 POS and Y2 POS control shafts fully counterclockwise Then install a small black knob on each of these shafts with each knob pointer positioned as shown v Install a small black knob with skirt on each of the INTENSITY FOCUS TRIG LEVEL and HORIZ POS control shafts SHIELDED CABLE PICTORIAL 4 21 n the three rotary switches large outer shafts fully counterclockwise nstall...

Page 81: ... II I 5 3 I I I I I I I I I I I 8 9 Page 79 PICTORIAL 4 22 Repeat the four previous steps and prepare the other shielded cable with connector Refer to Pictorial 4 22 for the following steps CAUTION When you install the plastic spacers in the next step carefully follow the instructions and ob serve the cautions on the epoxy glue packet Also be sure you do not get epoxy in the holes in plastic space...

Page 82: ...sted in the Possible Cause column for that step You may also refer to the In Case ofDifficulty section ofthe Manual Page 97 He sure you obtain the correct resistance reading before proceeding Refer to Pictorial 5 1 for the following steps Position the Oscilloscope bottom side up J Connect the negative ohmmeter lead to the chassis of the Oscilloscope Then touch the positive meter lead to the points...

Page 83: ... C302 and C303 5 Power Transformer 1 Power transformer 2 Diodes D301 and D302 3 Capacitors C301 C302 and C303 1 Power transformer 2 Diodes D301 and D302 3 Capacitors C301 C302 and C303 1 Power transformer 2 Diodes D301 and D302 3 Capacitors C301 C302 C303 C314 and C3t5 1 Capacitor C310 2 IC U302 3 Resistors R334 R335 and R336 1 Capacitor C309 2 IC U301 3 Connections to other circuit boards 1 Capac...

Page 84: ...Refer to Detail 6 1A and push the alignment tool blade into the end of the plastic nut starter Always use this tool to adjust the trimmer capacitors and controls in the following steps Set all the circuit board controls to their centers of rotation On the vertical circuit board turn all the trim mer capacitors clockwise until they are snug Then turn them counterclockwise 1 2 turn CAUTION AC and DC...

Page 85: ...the CRT trace is parallel with the horizontal graticule lines If it is not parallel perform the following numbered steps 1 Note the position ofthe trace and turn offthe power 2 Refer to Pictorial 6 2 and loosen the CRT clamp 3 Rotate the CRT to align the trace 4 Turn the power on and check the position of the trace All GNMENT TOOL BLADE Detail 6 lA 5 Repeat steps 1 3 and 4 as necessary to al lign ...

Page 86: ...ust the INPUT ZERO control for zero volts v Set the voltmeter to measure 5 volts DC easure the voltage at TP3 and record the read i ide this step It should be approximately 5 volts 8 to 5 2 Measure the voltages at TP4 and TP5 Adjust the front panel HORIZ POS control until both test points are equal Then adjust the BIAS AD control until the test point voltages equal the meter reading you recorded i...

Page 87: ... is 4 or 5 em high Adjust the TRIG LEVEL as required VERTICAL CALIBRATION AND ATTENUATOR COMPENSATION Refer to Pictorial 5 5 Illustration Booklet Page 24 for the following steps NOTE In the following steps use the channel Y1 switches and trimmer capacitors 1 Set the VOLTS CM switch to the 0 1 posi tion Use a nonmetallic screwdriver to ad just the x 100 trimmer capacitor for a proper display like t...

Page 88: ...he generator frequency to 5 kHz Adjust the horizontal circuit board CAL control and the HORIZ POS control so there are ten complete waveforms in 10 em as shown in Pic torial 6 9 Illustration Booklet Page 24 NOTE If a calibrated signal source is not available use the 1 V P P 60 Hz output Set the TIME CM switch to 2 mS and adjust the HORIZ CAL control for a waveform that is 8 6 em long The 1 V P P 6...

Page 89: ...OLTS CM to 0 05 and readjust the generator output for a 4 em display again Adjust trimmer capacitor 2 for a proper square wave NOTE If necessary repeat the previous steps until a proper square wave is displayed Repeat the previous steps under Low Capacity Probe for the Y2 channel However whenever Y1 is called for insert Y2 If may be possible to adjust channel Y2 without changing the probe compensa...

Page 90: ......

Page 91: ......

Page 92: ......

Page 93: ......

Page 94: ......

Page 95: ......

Page 96: ......

Page 97: ......

Page 98: ......

Page 99: ......

Page 100: ......

Page 101: ......

Page 102: ......

Page 103: ......

Page 104: ......

Page 105: ......

Page 106: ......

Page 107: ......

Page 108: ......

Page 109: ......

Page 110: ......

Page 111: ......

Page 112: ......

Page 113: ......

Page 114: ......

Page 115: ......

Page 116: ......

Page 117: ......

Page 118: ......

Page 119: ......

Page 120: ......

Page 121: ......

Page 122: ......

Page 123: ......

Page 124: ......

Page 125: ......

Page 126: ......

Page 127: ......

Page 128: ......

Page 129: ......

Page 130: ......

Page 131: ......

Page 132: ......

Page 133: ......

Page 134: ......

Page 135: ......

Page 136: ......

Page 137: ......

Page 138: ......

Page 139: ......

Page 140: ......

Page 141: ......

Page 142: ... DID OR NOTE HEATH PART NUMBE ARE STAMPED ON MOST DIOD OR lit OR miiiiiij I OR fJ OR JJX OR SjjW ...

Page 144: ...Vertical Circuit Board Parts ...

Page 145: ...ard Parts Pictorial Cont d Page 2 ...

Page 146: ...cc 0 L PICTORIAL 1 ...

Page 147: ...0 0 0 0 PICTORIAL 1 15 ...

Page 148: ...0 0 CI RC UI T B SH IEL PICTORIAL 1 17 ...

Page 149: ...4 CONDUCTOR FLAT CABLE CIRCUIT BOARD SH IELD VERTICAL CIRCUIT BOARD PICTORIAL 1 17 0 0 0 0 ...

Page 150: ...PICTORIAL 1 18 ...

Page 151: ......

Page 152: ...HORIZONTAL CIRCUIT BOARD nOR rl NOTE HEATH PART NUMBERS ARE STAMPED ON MOST DIODES OR t A2 mORm Q j 111111 m OR w OR jj ...

Page 153: ... UIT BOARD PARTS PICTORIAL Page 6 OR ...

Page 154: ...HORIZO NTA L CIRCUIT BOARD P CTORIAL 2 11 I 0 ...

Page 155: ...POWER SUPPLY CIRCUIT BOA C A noRl_ J 1n1 ...

Page 156: ...BOARD PARTS PICTORIAL NOTE HEATH PART NUMBERS ARE STAMPED ON MOST DIODES OR OR Sii OR e OR ilfP OR Siiiiiii OR Gi i OR Page 8 ...

Page 157: ... CHASSIS PARTS b JJ ...

Page 158: ...PARTS PICTORIAL cmo F erJ TID CID ill l lA lllllAMj D I CID Page 9 ...

Page 159: ...Chassis Parts Picto1 OR ...

Page 160: ... Pictorial Cont d Page 10 ffi wfi 1 m 1 M r P G ...

Page 161: ...0 0 0 e ID 0 FRONT OF CHASSIS 0 0 l lO TOP SIDE OF CHASSIS D 0 PICTORIAL 4 1 0 0 c c c ...

Page 162: ... J ITUDIO TOP SIDE Of CHASSIS 0 PICTORIAL 4 1 0 0 ...

Page 163: ...0 INSET 0 s PLIT BEAR ING Jml m r l s IDE 0 0 0000 0 0 0 PICTORIAL 4 2 ...

Page 164: ...0 FR0 NT lllo OF __ CHASS IS 0 rnJ 0 e o 0 0 0 0 0 0 ...

Page 165: ...0 0 0 0 0 oe PICTORIAL 4 4 ...

Page 166: ...0 0 PICTORIAL 4 5 t J 0 Jj ...

Page 167: ...0 0 VERTICAL CIRCU I T BOARD 0 0 E3 g o 0 oo a 26 SHIELDED CABLE PICTORIAL 4 7 3 t J 0 1 4 I NNER LEAD DO NOT REMO VE INSU LATION FRO M INNER LEAD JL ...

Page 168: ...29 32 SW ITCH COVER W l 3 16 METAL SW ITCH COVER TAB ICABINET FRONT e e e PICTORIAL 4 9 I ...

Page 169: ...B SWITCH 0 0 c J PICTORIAL 4 11 Page 17 ...

Page 170: ...6 3 2 X 1 4 HE X WASHER HEAD SCREW 0 e o 0 0 0 0 0 0 DANGER HIGH VOLTAGE f POWER SUPPLY CI RCUIT BOARD ClD VERTICAL CIR CU IT BOARD PICTORIAL 4 8 0 ...

Page 171: ...00 01ELDED CA BLES FROM GROMMET BF O Q PICTORIAL 4 13 0 0 0 0 ...

Page 172: ...tn T BLU T VI OL o 0 HORIZONTAL CIRCUI T BOARD 0 PICTORIAL 4 14 ...

Page 173: ...0 GRN 0 0 PICTORIAL 4 14 ...

Page 174: ...o I _ _J _j HORI ZO NTAL CIRCU IT BO ARD 0 0 0 PICTORIAL 4 15 ...

Page 175: ... 16A c_ EXT r c J BRN HORIZONTAL CIRCUIT BOARD PICTORIAL 4 16 I I I I y 6 32 X 3 8 I SCREW I I I I I I I I I I I I L__ GRN w HT 6 3 2 NUT 6 LOCKWASHER 6 32 NUT 6 LOCKWAS H ER L ICHA SS I S I 6 32 X 3 8 SCR EW NSn I _ _ ...

Page 176: ...6 32x3 l6 SCREW P lQr _ I 0 3 8 32 NU T 3 8 FLAT WASHER Detail 4 16A HORIZONTAL CIR CU IT BOARD ...

Page 177: ...Detail 4 16A HORIZONTAL CI RCU I T BOAR D 6 LO CKWASHER 6 3 2 NUT 6 I LO CKWA sHER L L__ I I ICHASS I S I I I I I 1 1 1 I I d I I I I I I I 6 32 X 3 8 SC REW INSET______j __ Page 21 ...

Page 178: ...PICTORIAL 4 17 ...

Page 179: ... HOR I ZONTAL CIRCUIT BOARD INTENS ITY FOC U S 0TIME ICM SWEEPVAR I HOR I Z GAIN m O J f liN oo 1 I TRI G LEVEL CAl Page 22 5 PICTORIAL 4 19 ...

Page 180: ...SI T Y oc us TRIG L E VEL HORIZ POS G P OWER IiiON U oFF PICTORIAL 4 20 OTIME ICM SWEEPVARIHORIZ GAIN ref r mS 0 0 5 E XT IN oO j I C Al I 1 TRIGGERING I AC y AUTO DC EXT NORMAl TV liNE H E A T H Kl T D B CILL0 8 CDP e M OOe L 10 4 205 1V P P EXT TRIG EXT 60H1 INPUT GN O INPUT ...

Page 181: ...r negative slope depending on the position of the switch TRIGGER MODE switch AUTO NORMAL In the 1 AUTO position a base line will always be present in the absence of a trigger signal In the NORMAL position the base line is not automatically generated EXT INPUT TRIGGER COUPLING switch AC DC TV The DC position couples the trigger signals directly to the trigger circuits This allows the sweep to be tr...

Page 182: ...annel Yl Y2 or both when in the yoLTS CM Each position of this attenuator switch CHOP or ALT position In the CHOP position thetwo ts marked for the number of volts peak to peak re inputs are sampled at approximately a 100 kHz rate quired to produce a pattern one centimeter high on and displayed In the ALT position the horizontal the graticule INTENSITY Clockwise brightness ofthe display Adj room l...

Page 183: ...POWER SUPPLY CIRCUIT BOARD PICTORIAL 6 3 ...

Page 184: ...TRIG BAL PICTORIAL 6 4 ...

Page 185: ...CHANNEL Y2 PICTORIAL 6 5 PHASE ...

Page 186: ...OTH LEADING EGDE f Page 24 SQUARE WAVE GENERATOR g Q 0 8 8 0 0 I llfF 0 O J 0 r 0 oooooo 11 o O o0 o v1 o o o o I PICTORIAL 6 6 WRONG WRONG PICTORIAL 6 7 PICTORIAL 6 9 PICTORIAL 6 8 lt ltltltlt l PICTORIAL 6 10 ...

Page 187: ...PICTORIAL 7 1 ...

Page 188: ... D PICTORIAL 8 1 A B c PICTORIAL 8 6 ...

Page 189: ...WARNING DANGEROUS VOLTAGE IN BOXED IN AREA S PICTORIAL 9 1 ...

Page 190: ...h I cc I I I I I ________ WARNING DANGEROUS VOLTAGE IN BOXED IN AREAS PICTORIAL 9 2 Page 26 ...

Page 191: ...ODE SW I TCH AND Dl SPLAY CONTROL Y2 TRIGGER AMP TR I GGER SELEC T YI v2 o 0 Ll NE o o fTRIGGER EX T Jr EXT HOR I Z I NPUT ATTE NUATOR CI RCU I T 0 HORIZONTAL DEFLECT I ON AMPLIFIER SWEE P 1 l o f CIRCU IT SWEEP EXT X BLOCK DIAGRAM BLANK I NG AND HIGH VOLTAGE SUPPLY LOW VOLTAGE SUPPLY AN D REGULATORS ...

Page 192: ...ltage at points P and U on the power AC supplycircuit board Thisvoltage should be 9 volts Check for solder bridges between foils on the other circuit boards Resistors R 34 R335 R336 incorrect value Capacitors C310 C311 incorrectly Integrated circuit U302 or U303 defective installed or faulty Measure the voltage at points N T and AH on the 6 Integrated circuit U301 defective Measure the voltage at ...

Page 193: ... voltage at points P and U on the power AC supplycircuit board This voltage should be 9 volts Check for solder bridges between foils on the other circuit boards Resistors R 4 R335 R336 incorrect value Capacitors C310 C311 incorrectly Integrated circuit U302 or U303 defective installed or faulty Measure the voltage at points N T and AH on the r3 Integrated circuit U301 defective Measure the voltage...

Page 194: ...ST 2 VERTICAL DEFLECTION A1 Measure the voltage on U102 Thes1 should be pin 6 greater than 2 4 volts and 8 less than 8 volts a111 or a118 incorrectly installed or fal Measure the voltage at thedrain pin 6 of adjustthe VERTICAL DC BALcontroltool DC Turn the power off and shortthebase of a base of a114 Turn the Oscilloscope on The collector voltages of 0115 and a1 same Turn the power off and remove ...

Page 195: ... parts values E The vertical deflection amplifier circuits are Tum the power off and short the base of 0113 to the operating properly base of 0114 Turn the Oscilloscope on t3 0113 or 0114 incorrectly installed o The collector voltages of 0115 and 0116 are the associated circuitry soldering i same values Turn the power off and remove the short connected between 0113 and 0114 Then short the base of ...

Page 196: ...ages of 0115 and 0116 are the E he power off and remove the short connected en 0104 and 0105 Then short pin 4 to pin 8 of Turn the Oscilloscope on v lllector voltages of 0115 and 0116 are the U102 incorrectly installed or faulty Vertical Mode switch SW4 incorrectly wired or faulty Measure the pin 8 of U101 This voltage should be less than 8 volt 0101 faulty Check associated circuitry soldering inc...

Page 197: ...ector voltage of 0214 and 0215 Adjust HORIZ POS control R8 on the front panel until these voltages are equal The horizontal deflection amplifier is operating properly TEST 3 HORIZONTAL DEFLECTit Makesurethevoltage at pin 8 of 0208 is 0volt 0208 faulty Check associated circuitry soldering incor rect parts values Turn the power off and short the base of 0212tothe base of 0213 Turn the power on ...

Page 198: ...ort the base of 0212 to the 13 Turn the power on h The collector voltages of 0214 and 0215 should be the same 0209 0210 incorrectly installed or faulty Check associated circuitry soldering incorrect parts val ues 0212 0213 0214 0215 incorrectly installed or NO faulty Check associated circuitry soldering incor rect parts values ______ ____ ...

Page 199: ...of 0304 should change from 30 volts to 70 volts Turn the power off and connect the voltmeter probe to the cathode banded end of D320 Turn the power on The voltage at D320 should be 1620 volts This voltage should change a slight amount as the INTENSITY control Is rotated The blanking circuits are operating properly These voltage readings depend on the setting of the INTENSITY BIAS control and can v...

Page 200: ... of C303 and R301 foils Check 0316 0320 and 0314 It should read 1650 VOC lfitislowerthan 1350VOC check 0317 and C320 Also check divider string R17 R6 R309 and R310 Checkthe voltage atAE It should read 1350 VOC for open and bad connections Ifthe voltage is higher Vi than 1350 VOC check for shorts in the divider Ey string and check wires and foils Check the voltage at point W It should read 1568 Che...

Page 201: ...ld change from a logic low 8 volt to a logic high 2 4 volts r The trigger circuits are operating properly Proceed to Test 7 if there is still a problem with the sweep circuits TEST 6 TRIGGER CIRCUITS Turn the power off andshort the base of 0203tothe base of 0204 Turn the Oscilloscope on The emitter voltages of 0205 and 0206 are the same 0201 faulty Check associated circuitry soldering incorrect pa...

Page 202: ... 0217 and associated parts Check D205 R233 R235 and R10 Also check the foils for short circuits U204 is defective U205 is defective or associated circuitry or foils Pin 8 may be high or low at this time but pin 13 should be high If it is not high Pin 10 should be high If it is not high place the TRIGGER MODE switch in the NORM position Pin 10 should now be high TEST 7 SWEEP CIRCUITS Check the wiri...

Page 203: ...ing to deck B of switch SWS To check U205 monitor the voltage at pin 1 while you short pin 10toground Pin 1should go low when pin 10 is grounded Measure the voltage at pin 13 of U201 It should be high Short pin 10 of U205 to ground pin 13 should go low Measure the voltage at pin 6 of U203 It should be high U202 is defective Measure the voltage at pins 11 and 8 of U202 while you short pin 10 of U20...

Page 204: ...ould change state Measure the voltage at pin 5 of U201 It should be low Measure the voltage at pin 8 of U201 It should be low r Check 0216 and associated foils The sweep and control circuits are OK Trigger amplifier or U202 is defective Also check wiring U201 defective or wiring or foils open between pin 1 and deck A of the TIME CM switch U201 is defective ...

Page 205: ...it component number R5 C3 etc on the X Ray View B Locate this same number in the Circuit Com ponent Number column of the Parts List C Adjacent to the circuit component number you will find the PART NUMBER and DESCRIP TION which must be supplied when you order a replacement part POWER SUPPLY CIRCUIT BOARD Viewed froill Component side ...

Page 206: ...HORIZONTAL CIRCUIT BOARD Viewed from component side ...

Page 207: ...VERTICAL CIRCUIT BOARD ...

Page 208: ...VERTICAL CIRCUIT BOARD Viewed from component side ...

Search results

Summary of Contents for IO-4205

Reviews:

Related manuals for IO-4205

Brands by name

Popular brands

Heathkit IO-4205, Manual

Search results

Summary of Contents for IO-4205

Reviews:

Related manuals for IO-4205

Brands by name

Popular brands