Hi, I hope you can help. I have aquired a Tektronic oscilloscope and have a problem with the display output on the CRT. I have the instruction manual and have exactly set the scope up in terms of button positions to get a base line trace section After a bit of adjustment I managed to get a horizontal flat line across the CRT screen.
The line changed in intensity and the intensity level was erratic. I depressed the beam find button and the beam reappeared above the centre line length 25mm. I ran the self check trouble shooting tests displayed on the CTM and no errrors were indicated. I am reasonably electronics literate and am quite happy to replace components if required but by no means an expert on these analgoue scopes. Based on the symptoms above could the forum suggest basic things to check.
Many thanks. Steps in the manual above and expected voltages. This line of scopes have a lot of rather old and dicky capacitors in them which can drag the voltages off. The caps are all original scope appears to be working ok with the beam finder permanently pushed in but crt blank when out.
Can you give advice where to look next? Posts: Country:. Quote from: bd on April 26, , am. Does the intensity control do anything when you hold the beam finder down? Some of these have dodgy intensity pots. The following users thanked this post: Old Printer. It's point 2 in the checkout, point 1 is already listed Ok here also see page of service manual. And yes, you should be carefull with this voltage. It's still not the final Crt HV. I've also measured the 14kV final HV on my Tek when I refurbished it, but with a special probe that is needed to do this safely.
Thanks for the info. Using beam finder I get a strong trace so suspect issue lies elsewhere. Looking at it I would assume the vertical circuit some where. Thanks for the help I am not going to let this defeat me!! Select the TEMP function. Disconnect the MO resistor and connect the 1. Before using any trouble in the instrument; therefore, it is important that the other type of cleaner, consult your Tektronix Service cause of overheating be corrected to prevent recurrence of Center or representative.
Cracks, scratches, deformations, and Cabinet and Front Panel damaged hardware or gaskets. Repair or replace missing or defective items. Missing, damaged, or loose knobs, Front-panel Controls buttons, and controls. Page Troubleshooting Maintenance— Service 4. Allow the CTM board assembly to air dry. In addition, Page Guide. This chart will help identify a particular problem area stripes identifies three digits of the Tektronix Part Number, for further troubleshooting.
If the power-up checks fail, the area of failure can be identified by the error message on the readout. A diode can be checked for either an open or a shorted or no current is flowing in the external circuit.
Page Maintenance— Service nal source current, such as the R X 1 kfi range. The diode serve the following symptom on the readout to identify resistance should be very high in one direction and very low which procedure to use: when the meter leads are reversed. These checks and routines are used as Bad Q and Q circuitry. F U did not reset after resetting the counter. F Bit 1 of Time counter stuck LO. See Figure for width test waveforms and their location. DMM serial interface loops test waveforms.
Page If it is necessary to by Tektronix, Inc. Order all special parts directly from your ship your instrument to a Tektronix Service Center for repair local Tektronix Field Office or representative. General soldering and Antex Precision Model C. Soldering Iron unsoldering. Assembly and disassembly. Torx Screwdrivers T7 T15, and T Remove the cable strap from the Alt Sweep circuit a.
Page Maintenance— Service Reinstall three screws securing the CTM circuit 2. Remove four screws located on the right side behind board to the instrument removed in step 4. Reconnect two connectors to the Display circuit 3. P, a four-wire connector located at the top of the boards, perform the following steps: circuit board.
Page Maintenance— Service 3. Skip to step 12 of this procedure after 4. Page Center for service or repair, attach a tag showing; owner with address and the name of an individual at your firm that can be contacted. Page Maintenance— Service inside dimensions of no less than six inches more than the Table instrument dimensions. Cushion the instrument by tightly Trigger Bandwidth Alternation packing three inches of dunnage or urethane foam between carton and instrument, on all sides.
C itv. S ta te. Page s s c l? Page ? Page o ui ui in in? Page u. Page o c o t UJU. Comoonent No. Part No. Page n » i. C om ponent N o. The information and special symbols below may appear in this manual. Assembly Numbers and Grid Coordinates The schematic diagram and circuit board component location illustration have grids. Locate the Component on the Schematic Diagram 2.
Page Service Figure CTM basic block diagram. Page Iv. A6—Filter board. R, i I. S74 U1 6 0 0 74U Page R em o ve the m etal power supply shield from the c o m p o n e n t side of the M a in circu it board as follows: a. Page 9. Print page 1 Print document pages. Rename the bookmark. Delete bookmark? Je serais heureux de trouver quelques infos ici. Muchas gracias amigos por aportar este manual del osciloscopio!!!
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Measurement instruments.
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