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Hi Bob and Mark, Thanks for the feedback. OK on PSU capping, might spend the dollars and give it a fresh start. OK on 2 x 4 way ribbons, makes total sense. Just read storage board latch and analog

Jurgen, Since the fuses are blown, check the solid state devices in the power supply. Replacing the condensers in the power supply is a good idea. Use high temp, low ESR and long life types like

Hi all, after a long time I switched on my 2784 and it was running for several minutes without CRT Image. Then the internal Fuse and the fuse of power outlet was blown. I think LED 10, 11 and 12 did

Hi Gerald, The PSU heat is dissipated, when in the case, by the screw through the case making a thermal connection to the outer case. Maybe not the best idea Tek had, but it works. When you have the

In that case... Excellent! This thing was picked up very cheap at the flea market and have no idea as to it's history, however it does seem to be complete, so let's see what happens with the PSU

James, The neons are there to help discharge the condensers when it is turned off. When on, the limiting resistor makes the combination of the R and Ne a relaxation oscillator. These blinking when on

Aneesh, Removing the ribbon connector while on could cause the IC to be defective causing a spike to damage the mosfet(s) in the upper part of the schematic. C807 could be shorted. Q802 could be bad

Gerald, Replacing the condensers in the power supply may make the temperature drop. The originals likely will be 85C. Nichicon UHE and UCY for the 100V supply are excellent replacements. Raising the

Hi All, I am in the process of alignment after an extensive repair process of a very clean 2232. I have several questions, hopefully some answers:- 1. Does the rear right side, PSU section get

Hi Jurgen, If ok with you, let's take this offline for now. Drop me a PM, any development can be shared in the future. Regards Gerald VK3GM

Quick progress report; ..is that with the unit open on the bench, and with two 2SC4430's (the BUV48A's were overpriced in the shop) in place of the 151-0703-00's then the voltage rails are once

Hi Albert. If I was fairly confident that I had the correct pin-out, you've made me certain. Many thanks

In order to replace the resistor, I think I'll need to remove everything so I can access the back: On instruments with serial numbers below B040909, examine the circuitry near A10U802 (the Horizontal

Hi James, The PSU schematic is f.i. at pdf page 225 492/492P Spectrum Analyzer Volume 2 Service manual ( 070-3784-01Tekwiki). Albert

??? On my TDS220 I changed the backlight lamp to a LED strip. ??? Mark Jordan, PY3SS

Hi All Anyone know what the correct voltage is at the input of L6 on the Power Supply. Its the supply circuit for the display CCFL. I'm getting -4.6v. My display is a dull shade of orange with no

The following photos have been uploaded to the SC503 - interesting waveform! ( /g/TekScopes/album?id=300884 ) photo album of the [email protected] group. * IMG_2525.jpeg (

Hi Gerald, after several years, it seems I found the right help for my 2784 Tektronix Spectrum Analyzer. I would be very interested in your Processor Extender Card with serial Port. Please let me

Hi Gerald I am repairing a Tektronix 2784. Therefore i'm searching for the Processor ExtenderBoard with the SerialPort or a Circuit Diagram for this. I know it's a 85C30 Dual Serial Interface from

Hi all, I am repairing a Tektronix 2784. Therefore i'm searching for the Processor ExtenderBoard with the SerialPort or a Circuit Diagram for this. I know it's a 85C30 Dual Serial Interface from Zilog