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If by “LPS 122 power supply Tektronix WFM7200” you mean the internal PSU used in the WFM7200, the safest identification is:
The key technical point is that the WFM7200 main PSU is not just a generic single-output board swap. The instrument’s service documentation shows that the monitor’s primary supply architecture includes:
This matters because some sample answers incorrectly suggest rails such as -12 V coming directly from the main PSU. For the WFM7200, that is not how the instrument is documented. The service manual states that the main supply provides the three rails above, while the other required voltages are created downstream on the boards. It explicitly lists secondary rails on the main board such as 3.3 V, 2.5 V, 1.5 V, 1.0 V, +5 VA, -5 VA, and 1.2 V, and additional rails on audio-related boards. (manualzilla.com)
From a power-system perspective, this is a typical broadcast-instrument architecture:
The Astec/Artesyn LPS120 family strongly resembles the original Tek supply electrically. The LPS120 datasheet shows:
That aligns closely with the Tektronix part description for 119-7522-00, which is why repair houses often associate the WFM7200 supply with an Astec LPS122-type unit. However, official Tek/Telestream documentation identifies the part by the Tektronix part number, not by the generic family number alone. (telestream.net)
A second important point is that Telestream later issued updated power-supply replacement instructions for the WFM/WVR 7200/8200/8300 family. In that document, the replacement kit contains:
The same instructions state that the new supply’s line connector is reversed, so line and neutral must be swapped at the AC line filter during installation. That is a strong indicator that replacement is not merely a matter of matching nominal voltage. Connector orientation, control wiring, and mechanical installation all matter. (telestream.net)
So, engineering-wise, the correct conclusion is:
As of April 21, 2026, Telestream is still publishing a current WFM/WVR 7200/8200/8300 power-supply replacement instruction document, and that document points to a replacement kit approach rather than field-level redesign. (telestream.net)
The currently documented replacement path includes:
From an engineering maintenance standpoint, this suggests that the supported service model for these legacy broadcast instruments has shifted toward module replacement rather than component-level board repair, even though capacitor-level repair is still feasible in a qualified bench environment. This is an inference based on the published replacement-kit documentation and standard service practice for aging open-frame SMPS units. (telestream.net)
If your WFM7200 is dead or not starting, the official troubleshooting flow is very useful:
Board indicators also help narrow the fault:
This means the power fault may be in one of three places:
Primary PSU failure
No +5 V main and possibly no +5 V standby. (manualzilla.com)
Distribution/fuse failure on the main board
PSU output is correct, but one of the downstream fused paths is open. The manual specifically says to check the eight 5 V fuses near the main board power connector if the main PSU voltage is correct. (manualzilla.com)
Power-control/front-panel logic failure
Standby is present, but the inhibit/start logic does not enable the main outputs. (manualzilla.com)
This repair has real safety implications:
So from a compliance and safety standpoint, a generic bench substitution that ignores insulation, creepage, grounding, or line/neutral orientation is not acceptable.
If your goal is repair or replacement, I recommend this sequence:
Step 1: Identify the installed part number on the PSU label.
If it says 119-7522-00, that is the official original Tek part reference. (telestream.net)
Step 2: Measure standby first.
Check J25 pin 2 for +5 V standby before assuming the entire instrument is dead. (manualzilla.com)
Step 3: Measure the main rail at J22.
If J22 is in the 4.80–5.25 V range, the PSU may be fine and the fault may be downstream. (manualzilla.com)
Step 4: Check the 5 V fuse bank and status LEDs.
This can distinguish PSU failure from main-board distribution failure. (manualzilla.com)
Step 5: If replacing the PSU, prefer the documented Tek/Telestream replacement path.
The newer kit includes the correct cables and installation instructions, including the line/neutral reversal note. (telestream.net)
Step 6: Do not buy a plain LPS122 board only on voltage/current similarity.
You must verify:
There is some naming ambiguity here:
Therefore, if you are ordering parts, the phrase “LPS122 for WFM7200” is useful for searching, but the Tek/Telestream part number is the safer procurement reference. (telestream.net)
If you want to continue this properly, the next high-value checks are:
If needed, I can help you with a pin-by-pin compatibility check between the installed WFM7200 PSU and an Astec/Artesyn LPS122-family board.
The Tektronix WFM7200 uses an internal PSU officially documented as Tek part 119-7522-00, not merely “an LPS122.” It is a 90–264 VAC, 130 W open-frame supply with +5 V main, +12 V auxiliary, and +5 V standby outputs. The generic Astec/Artesyn LPS122 is closely related electrically, but mechanical fit, standby/control wiring, and safety isolation make interchange nontrivial. Telestream’s later documented solution is a replacement kit using P00010704 plus new cables, not a blind generic PSU swap. (telestream.net)
If you want, send me a photo of the PSU label or the exact failure symptom, and I will give you a targeted repair/replacement decision tree for your specific WFM7200.