- Hameg hm205 3 service manual manuals#
- Hameg hm205 3 service manual pdf#
- Hameg hm205 3 service manual install#
- Hameg hm205 3 service manual drivers#
We stock manuals from most manufacturers,Tektronix, Phillips, Marconi, Racal, HP etc. HM604, HM605 and HM 1005 HZ96 Viewing Hood HZ47 For HM203, HM204, HM205, HM208, HM408, HM604, HM605 and HM 1005 Scope-T-tar HZtiOa For Checking the Y amplifier, timebase, and compensation of all probes, the HZ6O-2 is a crystal-controlled, fast rising (typ. If somebody has this floppy disk somewhere and can make a zip archive … What is funny is that the problem seems to have disappeared also on AUX2 channel (ex CH1) attenuator (Murphy, where are you ?) ! Michel.There is NO VAT payable on manuals. By the way, I am looking for the "TDS 700A Adjustment Software" which is the calibration software for this scope according to the service manual.
Hameg hm205 3 service manual pdf#
We offer PDF and Booklet service and repair manuals for all brands and models. Fortunately, no need to recalibrate to remove the offset: the Signal Path Compensation procedure fixed that. Hameg Service Manual for ANY Hameg model. Only a small offset on swapped channels between trace indicator & trace. Since the problem occurs after a certain period, youre probably looking at a faulty IC or a bad solder joint/connection somewhere in the timebase section. This "connector" is made by Cinch (# 380-02-20-049): Swapping is done quickly (just the front BNC to unsolder/resolder) and reassembly straightforward. Dave fiddles with a 19 Hameg HM205-3 combined Analog/Digital Oscilloscope And. Contact is made by a black plastic plate with small gold(?) wire balls into holes. Then, ten more screws hold a massive metal shield where the attenuators can be found: Laser trimmed resistors, thick film resistors and custom chip: Relays "on stilts": Attenuators are not soldered to acquisition board.
Hameg hm205 3 service manual drivers#
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Hameg hm205 3 service manual install#
Dismantling the scope is a pleasure: just slide the cover, unclip the front panel bezel, 3 connectors and about ten screws later, the acquisition board is out. To install your download click on the name of the downloaded file. So, last Saturday, I decided to swap CH1 attenuator with the much less used AUX2 one. By chance, TDS520B has 4 inputs with 4 identical attenuators, although only two "live" channels can be displayed at a time. I cannot explain that with the schematic of the input attenuator, maybe some sort of fault in M753 or a defective relay (5 relays): Input attenuator is a ceramic hybrid (H2462) beyond repair.
The strange thing is that this fault disappears when I apply some DC voltage (12V for example): after that, the input impedance is back to normal (1Mohm or 50ohm) until powered off. Apart from this, attenuator behaves correctly. No leaky electrolytic problem with this series, only the limited life NVRAM sword of Damocles ! It suffers from a strange issue: Sometimes, input impedance of CH1 is 170ohms in 1Mohm mode and 38ohm in 50ohm mode as if a 170ohm resistor was in parallel with the input. The tiny 8 pin chip at the center of the photo seems to drive the two BFG135 transistors, and probably powered by the +12v and -12v, but only have +11v and -3v in those ceramic capacitors that you can see near the tiny 8 pin chip. Download Hameg hm307-3 Hameg hm307-3.pdf Various electronics service manuals. My first 500MHz oscilloscope (among a quite large collection of lower bandwidth scopes: Tek 2445, TDS210, 475, Fluke PM3380B, Hameg HM205-3, Metrix OX8022, etc. This circuit is similar to the one in HM205-3 model, but with many differences. Hi all, it's my "Scope Fixing Saturday" ! I have recently acquired a used Tektronix TDS520B DSO (1997 vintage).