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PM 3400
Service manual
Philips PM 3400 Service Manual
Compact dual-trace sampling oscilloscope
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Contents
Table of Contents
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Table of Contents
Removing Printed-Circuit Card
Table of Contents
Vill. CIRCUIT DESCRIPTION
Trigger and Time-Base Circuits
Trigger and Hold-Off Circuits a
Fast-Ramp Generator
Comparator
Pulse Generator
Staircase Generator
Pump and Staircase Circuit
Blanking Mixer
Time-Scale Magnifier and Time Position
Sampling Pulse Generator
Trigger Take-Off
High-Frequency Compensation
Sampling Gate
Sampling Amplifier
Biasing of the Sampling Diodes
Bridge Network and Position Amplifier
Pre-Amplifier
Amplifier
Memory Gate and Memory-Gate Driver
Memory
Feedback and Smoothing
Mixer/Deflection Amplifier
Driver Time-Delay
Dual-Trace Multivibrator, Differential
Amplifiers A&B, Output Amplifier y
Trace Alignment
Output Amplifier
Stabilising Circuits
Stabilising
Overload Protection
And +6.3 V Stabilising Circuits
High Voltage Power Supply
Low Voltage Rectifier
Gaining Access to Parts
Removing the Housing
Removing the Knobs
Removing the Crt Bezel
Removing the EHT Plug
Removing the Crt
Mounting a New Crt
Removing the Handle
And8
Removing Printed-Wiring Cards 6 and
Inserting Printed Wiring Cards 1
Removing the Sampling Head
Fitting the Sampling Head
Gaining Access to the Sampling Diodes
Dismantling the Sampling Head
Gaining Access to the Trigger Take-Off Transformer
Survey of Equipment Required for Checking, Adjusting and Fault Finding
Checking and Adjusting
PM 3400-1, Trigg./Time Base
Equipment Required
Preliminary Settings of the PM 3400 Controls
Adjusting
Input Signal
13:2: Adjusting RV102, TRIGG. T.D. BIAS
Adjusting RV101, SYNC. BAL
Bias
Adjusting RV103, MEMORY T.D. BIAS
Adjusting RV104, PULSE WIDTH
SLT: Checking the Amplitude of
Checking the Triggering Stability
Checking the Tunnel Diodes on Circuit Board
PM 3400-2, Staircase Generator
Equipment Required
Preliminary Settings of
Adjusting
Adjusting RV201, DELAY ZERO
Checking the Inter-Dot Blanking Circuits
Checking the Sampling Density
Checking the Horizontal Modes
Of Switch S5
Checking the Staircase Synchronisation
General Check
Equipment Required
Checking
Fault Tracing Analysis
List of Mechanical Parts
List of Electrical Parts
Resistors
Variable Resistors
Capacitors
Variable Capacitors
Miscellaneous
Coils
Transformers
Assemblies
And Lamps
Semiconductors
Transistors
Selected Transistors
Diodes
Selected Diodes
Values of C22
Version Pm 3400-01
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