Page 1: ...of continuous development and improvement and _in_ consequence may incorporate minor detail changes from the information contained herein Serviscope and TelequipmenT are registered trade marks of TEL...
Page 2: ...IPTION S51A S51E S51T FIRST TIME OPERATION Use of Controls Simplified Method CIRCUIT DESCRIPTION eee MAINTENANCE AND ADJUSTMENT PROCEDURES COMPONENTS LIST vee soe CIRCUIT DIAGRAMS see COMPONENT LOCATI...
Page 3: ...the Pre Amplifier to be switched out when the S 51T has a performance and specification identical to the S 51A With the Pre Amplifier switched in the X Amplifier gain is increased to 100 mV cm and the...
Page 4: ...he slowest sweep to l sec cm HORIZONTAL AMPLIFIER The X GAIN control expands the trace to approximately 2 times and sufficient shift is provided to enable any part of the expanded trace to be position...
Page 5: ...kes it possible to trigger the sweep from the Frame pulses of a composite Television waveform REAR CONNECTORS Connectors on the rear panel provide access to the Horizon tal Amplifier and intensity mod...
Page 6: ...STARILITY TV FELD EXT TRIG aot...
Page 7: ...e supply leads to the appropriate tags as shown below Set for 220 volts Set for 110 volts Operation Operation 0 0 Link o o Mains input Link Mains input 110 110 Link 110 110 10 10 20 20 USE OF CONTROLS...
Page 8: ...f the TRIGGER LEVEL control is turned fully anti clockwise to operate the AUTO switch the trace will re appear In this condition the instrumentis ready to accept almost any input waveform and trigger...
Page 9: ...d the trace will revert to its full brightness TRIG SELECTOR There are four positions on the selector switches For most purposes use the positive or negative normal positions depending on the polarity...
Page 10: ...he Vertical Amplifier Normally this is used merely to obtain a picture of convenient height but if the gain of the Amplifier is standardised direct readings of the input voltage can be made D C A C SW...
Page 11: ...n the above instructions the functions of controls have been explained in some detail so that the engineer using the S51 mayfully appreciate its capacities and the method of function There will howeve...
Page 12: ...oarse and fine frequency controls to suit the input signal For T V waveforms use T V FIELD position S51A and S51T only If the sweep fails to lock the STABILITY control has been turned up too far For s...
Page 13: ...arse and fine frequency controls to suit the input signal For T V waveforms use T V FIELD position S51A and S51T only If the sweep fails to lock the STABILITY control has been turned up too far For so...
Page 14: ...The trigger selection is performed by three switches SW2 selects the INT EXT triggering signal and connects it to the grid of phase splitter V4B SW3 selects the positive or negative output of the phas...
Page 15: ...o reducing the valve current The resulting rise in screen potential developed across R69 is coupled via R71 and SW7A tothe grid of V5A This causes V5A anode voltage to fall which leads to regenerative...
Page 16: ...2 The negative high voltage supply for the C R T is derived from the secondary of the power transformer via MR4 MR4 also supplies the negative supply to the STABILITY control The positive high voltage...
Page 17: ...squarewave generator with a frequency of approximately 2 Kc s and whose output can be varied between 2 volts and 100 volts The rise time of the squarewave need not be particularly fast butit must hav...
Page 18: ...high frequency compensation of the vertical amplifier shouid oniy be carried out if you have at your disposal a squarewave generator which is capable of producing an accurate Squarewave at a frequenc...
Page 19: ...7 on the CRT Set the TIME CM switch to 100 usecs Now advance the BRILLIANCE control until you can see the spot at the beginning of the trace and you will find that by adjusting C23 you will be able t...
Page 20: ...te shield voltage serves to correct pin cushion and barrel pattern distortion This control is set during test No further adjustment should be necessary unless the tubeis changed HIGH IMPEDANCE PROBE T...
Page 21: ...st ment Metal Oxide In the following components list no manvfacturers names have been included When replacing components locally available alternatives may be used if exact replacements are not to han...
Page 22: ...0 R13 270K C 10 iw S 10116 Ri4 100 C 10 iw 9 12510 R15 1 2M C 10 tw S 10310 R16 i0K C 10 iw Y 47210 R17 4 7K C 10 4w 22210 R18 2 2K C 10 iw Y 15310 R19 15K C 10 tw 9 15510 R21 1 5M C 10 tw 65L R22 1K...
Page 23: ...S 22410 R55 220K 22410 R506 220K 9 15510 R57 1 5M 10110 R58 100 S 10110 R59 100 27210 R60 2 7K Y 82210 R61 8 2K 97M R63 680K 22410 R64 220K 101M R65 6 1M S 47110 R66 470 S 56410 R67 560K S 10110 R68 1...
Page 24: ...00K 1M 750 Ohms 120K 22K 0 1 6 30pF 6 30pF 6 30pF 6 30pF 100pF 1000pF 6 30pF 6 30pF 50pF 20pF 6 30pF 6 30pF 30pF 0 01 0 1 0 1 32 32 32 DESCRIPTION Tol Rating HSC 1 tw HSC 1 tw HSC i Ww HSC 1 gw HSC 1...
Page 25: ...9 30pF CER 5 500v 53K C20 100pF CER 20 500v 33K C22 0 1 POL 20 125v 163 C23 6 30pF CER TRIMMER 20 350v 675 C25 0 01 POL 20 400v 10J C26 0 22 POL 20 400v 42K C27 39pF CER 5 500v 53K C28 100pF CER 20 50...
Page 26: ...34E MR5 Diode OA81 Mullard 180 MR6 Diode ZS75 Ferranti 4C RVI 500 Potentiometer Preset Y Gain 76C RV2 10K Potentiometer Y Shift RV3 Potentiometer Brightness a swi 200K On Off 71C RV4 1M Potentiometer...
Page 27: ...ator Switch 1 Pole 2 Pos Slider AC DC Variable Inductor Fixed Inductor Fixed Inductor Fixed Inductor Lamp 6 5V L E S 0 15 amp Delay Fuse 5 8 long 750Ma at 240v ROmwe 1 54 at 110v Cathode Ray Tube SE5F...
