Philips PM 3256U - User Manual

Precautions for safe operation, servicing, and personnel.

Explains the meaning of CAUTION and WARNING statements.

Explains safety symbols used in the manual.

Procedure when safety protection is impaired.

General statements regarding instrument use and safety.

Details about the cathode ray tube specifications.

Specifications and characteristics of the vertical deflection system.

Specifications related to the trigger view function.

Specifications for the horizontal deflection and time base.

Operation in X-Y mode.

Specifications for the calibration unit.

Power supply requirements and ratings.

Z-modulation characteristics.

Available options for the instrument.

Operating and storage environmental conditions.

Overview of the instrument's block diagram.

Detailed explanation of the vertical deflection circuitry.

Explanation of the horizontal deflection circuitry.

Description of the main time base circuitry.

Description of the delayed time base circuitry.

Circuitry for CRT display, CAL generator, and signal lamps.

Circuit description of the power supply unit.

How input signals are coupled to the vertical amplifier.

Description of the attenuator and impedance converter circuits.

Covers various amplifier stages.

Logic for selecting vertical channels.

Covers various aspects of trigger circuits.

Generation of delayed time-base signals.

Overview of basic analog and digital circuits.

General information on dismantling procedures.

Steps for removing the top and bottom covers.

Access points for checking and adjusting components.

General information and warnings for performance checks.

List of recommended test equipment.

Step-by-step procedure for checking instrument performance.

Checking vertical deflection coefficients.

Checking the continuous control function.

Checking input coupling.

Checking pulse aberrations.

Checking rise time specifications.

Checking trigger sensitivity.

Checking trigger bandwidth.

General information on checking and adjusting procedures.

List of equipment for checking and adjusting.

Recommended preliminary settings for controls.

Procedures for checking and adjusting power supply.

Adjustments related to the CRT display.

Procedures for balancing channels A and B.

Adjustments for LF corrections and sensitivities.

Adjustments for vertical channels.

Procedures for checking and adjusting triggering.

Important notes regarding maintenance procedures.

Information on replacing components.

Guidance and hints for troubleshooting instrument faults.

Proper techniques for soldering electronic components.

Procedure for replacing control knobs.

Steps for replacing the CRT.

Procedures for removing printed circuit boards.

Specific hints for diagnosing problems.

List of parts shown in figures.

Lists capacitors, ICs, potentiometers, resistors, semiconductors.

Location of electrical parts on PCBs.

PCB layout for pre-amp/trigger.

Circuit diagram for vertical deflection and amplifier.

PCB layout for time-base unit.

Circuit diagram of main time-base.

Circuit diagram of delayed time-base.

PCB layout for final amplifier.

Circuit diagrams for X-amp, Z-amp, cal, display.

PCB layout for power supply.

Circuit diagram for power supply and HV generator.

PCB layout for trigger selection unit.

PCB layout for time-base unit.

Introduction to voltage waveforms and test procedures.

Waveforms for vertical deflection and triggering.

Waveforms for horizontal deflection.

Waveforms for the power supply unit.