Equipment information

Philips PM3208 Oscilloscope
Manufacturer:
Philips
Model: PM3208
Date: 1989
Category: Measurement instruments
Group: Oscilloscope
Description: 20MHz Dual Channel Oscilloscope
Information:

These manuals are available for the above equipment:

Manual Type: Service Manual Philips-13075-Manual-Page-1-Picture
Pages: 81
Size: 5.49 Mbytes (5755665 Bytes)
Language: english
Revision:
Manual-ID/Number: 4822 872 05336
Date: 01 July 1989
Quality: Scanned document, all readable.
Upload date:
MD5: f3bff964cdbb33570d00ab8a623fe2b6
Downloads: 14 since 31 July 2020
Information:

1 SAFETY INSTRUCTION t - 1 1.1 INTRODUCTION ... 1 - 1 1.2 SAFETY PRECAUTIONS ... 1 - 1 1.3 CAUTION AND WARNING STATEMENTS ... 1 - 1 1.4 SYMBOLS ... 1 - 1 1.5 IMPAIRED SAFETY-PROTECTION ... 1 - 2 1.6 GENERAL CLAUSES ... 1 - 2 2 CHARACTERISTICS 2 - 1 2.1 DISPLAY ... 2 - 2 2.2 VERTICAL DEFLECTION OR Y AXIS ... 2 - 2 2.3 CHANNELS A AND B ... 2-2 2.4 EXTERNAL INPUT ... 2 - 4 2.5 HORIZONTAL DEFLECTION OR X AXIS ... 2 - 4 2.6 MAIN TIME BASE ... 2 - 4 2.7 EXTERNAL HORIZONTAL DEFLECTION ... 2 - 5 2.8 TRIGGER MTB ... 2 - 5 2.9 BLANKING OR Z AXIS ... 2 - 6 2.10 CALIBRATOR ... 2 - 6 2.11 POWER SUPPLY ... ... 2 -6 2.12 ENVIRONMENTAL ... 2 - 7 2.13 SAFETY ... 2 - 8 3 BLOCK DIAGRAM DESCRIPTION 3 - 1 3.1 VERTICAL DEFLECTION ... 3 - 1 3.2 HORIZONTAL DEFLECTION ... 3 - 2 3.3 POWER SUPPLY ... 3 - 2 4 CIRCUIT DESCRIPTION 4-1 4.1 VERTICAL DEFLECTION ... 4 - 1 4.1.1 Attenuator ... 4 - 1 4.1.2 Preamplifier ... 4-1 4.1.3 Intermediate Amplifier ... 4-1 4.1.4 Y-out Amplifier ... 4-1 4.1.5 Vertical switching circuit ... 4 - 1 4.1.6 Vertical output Amplifier ... 4 - 2 4.2 HORIZONTAL DEFLECTION ... 4 - 2 4.2.1 Trigger Amplifier ... 4-2 4.2.2 Trigger Generator ... 4-2 4.2.3 Main time-base; (MTB) sweep Generator ... 4 - 3 4.2.4 Horizontal switching circuit ... 4 - 3 4.2.5 Horizontal output Amplifier ... 4 - 4 4.3 CRT CIRCUIT ... 4-5 4.3.1 Z-axis Amplifier ... 4-5 4.3.2 CRT control ... 4-6 4.3.3 HV supply ... 4 - 6 4.4 CALIBRATOR ... 4 - 6 4.5 POWER SUPPLY ... 4 - 7 PERFORMANCE CHECK AND ADJUSTMENT PROCEDURE 5 - 1 5.1 GENERAL INFORMATION ... 5-1 5.2 RECOMMENDED TEST AND CALIBRATION EQUIPMENT ... 5 - 4 5.3 PERFORMANCE CHECK AND ADJUSTMENT PROCEDURE ... 5 - 5 5.3.1 Power supply low voltage ... 5-5 5.3.2 Power supply high voltage ... 5-5 5.3.3 Power consumption ... 5-5 5.3.4 CRT intensity adjustment ... 5 - 5 5.3.5 CRT focus adjustment ... 5-5 5.3.6 CRT astigmatism adjustment ... 5 - 6 5.3.7 Vertical step balance adjustment ... 5 - 6 5.3.8 Vertical x5 MAG balance adjustment ... 5 - 6 5.3.9 Vertical variable gain balance adjustment ... 5 - 6 5.3.10 Vertical gain ... 5-6 5.3.11 Vertical x5 MAG gain ... 5-7 5.3.12 Channel B invert adjustment ... 5 - 7 5.3.13 ADD balance adjustment ... 5-8 5.3.14 Low frequency response adjustment ... 5 - 8 5.3.15 High frequency response adjustment ... 5 - 8 5.3.16 1 kHz square-wave response adjustment ... 5 - 8 5.3.17 Input impedance adjustment ... 5 - 9 5.3.18 Dual A and B, polarity inversion channel B ... 5 - 9 5.3.19 ADD facility ... 5-9 5.3.20 Vertical bandwidth ... 5-10 5.3.21 Trigger DC balance adjustment ... 5 - 10 5.3.22 Y-out DC balance adjustment ... 5 - 10 5.3.23 Y-out gain adjustment ... 5 - 10 5.3.24 X-gain adjustment ... 5 - 11 5.3.25 Triggering adjustment ... 5 - 11 5.3.26 Trace starting point adjustment ... :: ... 5 - 11 5.3.27 X-Y centering adjustment ... 5 - 11 5.3.28 Horizontal bandwidth ... 5 - 12 5.3.29 Z input ... 5-12 5.3.30 MTB deflection coefficients ... 5 - 12 5.3.31 Sweep length adjustment ... 5 - 13 5.3.32 x10 MAG time adjustment ... 5-13 5.3.33 x10 MAG centre balance adjustment ... 5 - 14 6 DISMANTLING THE INSTRUMENT 6 - 1 6.1 GENERAL INFORMATION ... 6 - 1 6.2 REMOVING THE TOP- AND BOTTOM COVERS ... 6 - 1 6.2.1 Removing the top cover ... 6-1 6.2.2 Removing the bottom cover ... 6 - 1 6.2.3 Remounting the covers ... 6-1 6.3 ACCESS TO PARTS FOR CHECKING AND ADJUSTING PROCEDURE ... 6 - 2 7 CORRECTIVE MAINTENANCE 7 - 1 7.1 REPLACEMENTS ... 7 - 1 7.1.1 Standard parts ... 7-1 7.1.2 Special parts ... 7 - 1 7.1.3 Transistors and integrated circuits ... 7 - 1 7.2 REMOVING AND REMOUNTING THE UNITS ... ... 7 - 2 7.2.1 Removing the vertical PCB ... 7-2 7.2.2 Removing the horizontal PCB ... 7 - 2 7.2.3 Removing the cal and control PCB ... 7-3 7.2.4 Removing the mode PCB ... 7 - 4 7.2.5 Removing the CRT ... 7-4 7.2.6 Replacing the text plate ... 7-5 8 SAFETY INSPECTION AND TEST AFTER REPAIR IN THE PRIMARY CIRCUIT 8 - 1 8.1 GENERAL DIRECTIVES ... 8 - 1 8.2 SAFETY COMPONENTS ... 8 - 1 8.3 CHECKING THE PROTECTIVE EARTH CONNECTION ... 8 - 1 8.4 CHECKING THE INSULATION RESISTANCE ... 8 - 1 8.5 CHECKING THE LEAKAGE CURRENT ... 8 - 1 8.6 VOLTAGE TEST ... 8 - 2 9 PARTSLIST 9 - 1 9.1 MECHANICAL PARTS ... 9 - 1 9.2 UNITS ... 9 - 12 9.3 CABLES AND CONNECTORS ... 9-12 9.4 ELECTRICAL PARTS ... 9 - 13 9.4.1 Special capacitors ... 9-13 9.4.2 Trimmer capacitors ... 9-14 9.4.3 Special resistors ... 9 - 14 9.4.4 Trimmer resistors ... 9-14 9.4.5 Potentiometers ... 9 - 15 9.4.6 Diodes ... 9 - 15 9.4.7 Transistors ... 9-17 9.4.8 Integrated circuits ... 9-19 9.4.9 Miscellaneous ... 9-20 10 CIRCUIT DIAGRAMS + PCB LAY OUTS 10 - 1

Philips-13075-Manual-Page-1-Picture


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