Description
Fluke 190-104/S Scopemeter Repair
The Fluke 190-104/S is a ScopeMeter Test Tool from the 190 series – the line built around independently isolated inputs. Each channel floats separately, which is the entire reason these instruments get bought for motor drives, power electronics and three-phase work where two probes sharing a ground would short something expensive together. This model is the 100 MHz, four-channel configuration, so its front-end and timebase are specified accordingly and are verified to that bandwidth after repair. Four isolated channels is the configuration bought for three-phase and drive work, where the channel count is the whole point. The /S designation is the kit configuration, supplied with software and case – the instrument itself is identical to the base model.
June Company repairs and calibrates the Fluke 190-104/S for field service engineers, drive and motor technicians, power electronics engineers, and industrial maintenance teams. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Fluke 190-104/S problems we fix
- Keypad or rotary control unresponsive.
- Measurements drifted out of tolerance – the measurement path, corrected and verified against reference standards.
- Ruggedised case seals and connectors damaged.
- Isolation between channels compromised – the fault specific to this series and the most important one to catch – a 190 with a degraded isolation barrier still displays waveforms perfectly while no longer being safe for the floating measurements it was bought for.
- Channel dead, noisy, or reading inaccurately – input front-end damage, almost always from an over-range or transient input, repaired at component level and the channel re-verified.
- Waveform will not trigger or hold steady – the trigger circuit, which is what turns a scope into an unusable one while every other function still appears to work.
- Display failure – blank, dim, or degraded LCD – on the older ScopeMeters this often shows as banding or a faded centre before it fails outright.
- Will not power on or hold charge – the battery pack and the charging circuit, tested separately since either can present as a dead instrument.
FAQs
What if it is not economical to repair? We tell you in the quote. The evaluation is free and there is no obligation.
How long does a repair take? Most are completed in 5-10 business days, with a firm quote after evaluation and before any work begins.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.





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