-
Philips pm3400 analog sampling oscilloscope service manual
The service manual for the Philips pm3400 compact dual-trace analog sampling oscilloscope. This includes all the schematics as well as details about the differences between revisions /01, /02 and /03.
-
Philips pm9342 pm9343 pm9344 passive probe manual
Manual for the passive probes used with the Philips pm3400 analog sampling oscilloscope. These include the pm9342, pm9343 and pm9344
-
Philips pm3400 analog sampling oscilloscope user manual
User manual for the Philips pm3400 compact analog sampling oscilloscope.
-
Tektronix 571 curve tracer user manual
The user manual for the Tektronix 571 curve tracer. One of the first curve tracers to use digital data acquisition and control.
-
Tektronix 571 Curve Tracer
-
Philips PM3632 Logic Analyzer intake and cleaning
This PM3632 Philips logic analyzer was cleaned and had its tilting bail replaced. The device was sold as working and the display does turn on but is partially of the screen.
Vertical and horizontal adjustments are needed.
-
Broken Philips PM3632 Logic Analyzer intake and cleaning
After some initial pictures the device was thoroughly cleaned using wet wipes and paper towels. Further disassembly allowed to take several pictures of the internals.
The tilting bail as well as several cover plates were swapped with another PM3632. This device will be used for spare parts as it is currently not functional.
Upon power on the device makes a very high pitched noise and the CRT does not display an image. However, a brief flash can be seen the instant of power on. When pressing buttons the device still beeps so digitally it is likely fine.
-
Philips PM5715 Pulse Generator intake and cleaning
The Philips PM5715 was sold as working and was thoroughly demonstrated. However, the device is quite dirty and needed proper cleaning. In addition, the tilting bail handle was fixed as it had split into several pieces.
The repair
-
Philips PM3632 Logic Analyzer
The Philips PM3632 Logic Analyzer is a 32 channel logic analyzer capable of tracking 100 MHz state transitions at reduced channels. Alternatively up to 12.5 MHz can be used at the full 32 channels.
-
Philips PM3632 Logic Analyzer (broken, spare parts)
The Philips PM3632 Logic Analyzer this unit is broken and primarily intended for spare parts
-
Philips PM6634 automatic frequency converter
Manual for the Philips PM6634 automatic frequency converter that can be installed as peripheral in the Philips PM6650 counter.
-
Philips PM9687 d/a converter manual
Manual for the Philips PM9687 data converter sub unit that can be installed in the Philips PM6650 counter.
-
Philips PM9685 remote control unit manual
Manual for the Philips PM9685 remote control unit that can be used in the Philips PM6650 counter.
-
Philips PM9684 bcd output unit manual
Manual for the Philips PM9684 bcd output sub unit that can be installed in the PM6650 counter.
-
Philips PM6650 counter service manual
The service manual for the Philips PM6650 fast counter including schematics, calibration procedures and parts lists.
-
Philips PM6650 counter user manual
Philips PM6650 high speed (512 MHz) counter user manual.
-
Philips PM3220 Analog Oscilloscope Service Revision 21 03
Philips PM3220 Analog Oscilloscope Service Manual Revision 21 03. Contains changes between revisions in terms of parts as well as updated schematics.
-
Philips PM3220 Analog Oscilloscope User and Service Manual
Combined user and service manual for the Philips PM3220 analog oscilloscope from 1969. This manual includes calibration procedures, schematics and parts lists. This oscilloscope is not to be confused with the identically named PM3220 digital oscilloscope released 30 years after this model.
-
Philips PM5715 Pulse Generator
-
No more display output on the Hameg hm1005
Unfortunately, the output has disappeared from the Hameg hm1005. This is most likely caused by the previous repair to the final vertical amplifier. The problem seems to manifest slightly differently as the under and over scan indicators do not seems to suggest the trace is off screen. Hopefully none of the transistors are damaged as the vertical amplifier is carefully balanced using complementary pairs of transistors for all its half a dozen stages.
We should investigate the cause at some point. Starting with blanking circuits and afterwards following the signal paths from were both inputs are combined into the amplifier.
It should be noted that there is also no horizontal output or deflection so perhaps the HV power supply has issues.
-
Philips PM6654 timer final cleaning and installation
The exterior of the Philips PM6654 is cleaned using wet wipes, paper towels and some light detergent. Primarily the top cover had several stains. Afterwards the device was fully reassembled and placed in a more permanent position next to the Hameg HM1005.
-
Philips PM6654 intake and display repair
The initial intake of the Philips PM6654 went pretty smoothly. Most features are tested including frequency, pulse width, rise and fall time and phase. Particularly rise and fall time as well as phase measurements seem quite sensitive and it is difficult to produce good readings. This aligns with the user and service manuals were these measurements are averaged and require substantial dead time between measurements.
All operations do seem within specification so no adjustments are needed. However, the display does show weaknesses. This included the first 3/4 decimals not lighting up, the second function column not lighting up and the display of Hz / Seconds / Volts being intermittent.
Upon investigation the cause was found to be a tiny piece of metal that was hanging from a spider web. This spider web was in close proximity to pins on the rear shorting them together intermittently. Removing this piece of metal as well as some general debris removal resolved the issue entirely.
-
PM6654 programmable timer / counter
This programmable counter / timer from Philips is a very versatile unit capable of many computations including pulse width, rise and fall time and duty cycle across. The device has two inputs and is able to compute differences between the two including phase. Custom computations between the two inputs can be defined and enabled using the 9 digit keyboard.
Several limitations apply to more complex computations such as those of phase and rise and fall time. These typically manifest in a mandatory dead time of several 10s to 100s of nanoseconds which severely reduces the maximum frequency (2 MHz for phase & 10 MHz for rise and fall).
-
Hameg HM 1005 oscilloscope repair
The vertical deflection driver for the CRT had been known bad for quite some time. Upon investigation a damaged trace was found (image 1) on one side of the totem pole drivers and it was bridged (image 2).
After this the unit appeared fully functional if not for several intermittent potentiometers. After identifying several of these potentiometers including, brightness, focus and timebase further ailments where discovered. These include the misalignment of the delay and regular timebase.
The timebases where promptly realigned by adjusting the belt (image 3).
Finally, the front panel was cleaned (image 4 and 5). The final steps remain to clean or replace misbehaving potentiometers.
-
HP 54501A
The 54501A is a digital oscilloscope with 100Mhz bandwidth and 4 channels. The device is quite feature rich for its era have dedicated measurement functionality for frequency and amplitude analysis. Up to three measurements can be active at any given time. Other notable features include the ability to store four waveforms in nonvolatile memory, autoscaling and averaging using up to 2038 samples