GE LOGIQ F6/F8 and Vivid T8/T9 Board Repair by Symptom: Shared Chassis vs Unique Assemblies — and Why 5440428-S Is Not 5653512-S, 5537638-S, or EMH350PS18/10009148

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Use the links below to navigate directly to specific diagnostic frameworks, part crosswalks, or regulatory rule-outs:

• 1. When is a LOGIQ F6/F8 assembly actually shared with Vivid T8, and when is 'same hardware' only an F-series 510(k) sentence?
• 2. Which LOGIQ F6/F8 or Vivid T8/T9 board domain does my symptom point to? (Table 1)
• 3. Why is catalog cart PSU 5440428-S not GE Shop 5653512-S, not T8 DC/DC 5537638-S, and not AI Overview EMH350PS18/10009148? (Table 2)
• 4. If the F8 board-repair SERP ranks USB 5450942-S first, why is that SKU not TI 5620401?
• 5. How do I read inventory 5456663 versus 5456663-5S before ordering an IO board? (Table 3)
• 6. How do Vivid T8/T9 control panel 5720091, keyboard D0K-V6208L, and trackball 42PBNC200 compare across platforms?
• 7. When must I clear Z-2029-2025 (LOGIQ F R3 EFW/Whizz software) instead of replacing a circuit board?
• 8. What does the 510(k) clearance timeline reveal about LOGIQ F versus Vivid T8/T9 lifecycle status? (Chart 1)
• 9. Why must the live F8 F6 T8 model-page 24-row stock table not be copied into this repair route?
• 10. Where does Rongtao Medical fit in F6/F8 and T8/T9 board servicing — and where does it not?
• 11. What technical details and photos are required for a quote-ready handoff?
• 12. Frequently Asked Questions (FAQs)

When is a LOGIQ F6/F8 assembly actually shared with Vivid T8, and when is 'same hardware' only an F-series 510(k) sentence?

In clinical engineering practice, confusion surrounding the GE LOGIQ F-series and Vivid T-series stems directly from regulatory documentation. Under FDA 510(k) Premarket Notification K160277 (cleared March 25, 2016), GE Healthcare stated that the LOGIQ F8 Expert, LOGIQ F8, and LOGIQ F6 have the same hardware and system features ². That sentence covers those three general-imaging models; it is not a pin-for-pin board map. If the console in front of you is a LOGIQ E9/E10, LOGIQ P5–P9, Vivid E95, laptop LOGIQ e, or Vivid i, leave this page: use the LOGIQ P-series family path for P8 pollution, the Vivid E-series family path for E-carts, and the portable battery versus adapter versus DC/DC path for laptop packs. For brand-wide context, see the GE ultrasound equipment hub.

However, third-party parts brokers, marketplace aggregators, and generative AI search overviews regularly make an unjustified leap: they extrapolate the K160277 'same hardware' finding to include the Vivid T8 and Vivid T9 cardiovascular consoles. Rongtao's catalog photographs cart PSU 5440428-S as LOGIQ F8 F6 T8 ⁵. That photographed PSU identity is not a license to treat TI boards, DC/DC kits, control panels, or keyboards as shared, and it does not extend K160277 onto T8/T9:

• Distinct Regulatory Lineage: The Vivid T8 was originally cleared under 510(k) K141067 (May 2014) as a Traditional IYN system. While it cited the LOGIQ F Series (K133034) as a predicate device, its clinical indications, presets, and cardiovascular signal processing pathways are distinct ². Subsequent filings (K160078, K181934, K200851, K221147, and K243628 cleared February 11, 2025) established the dual Vivid T8 / Vivid T9 line, incorporating dedicated cardiac software packages and optional cart battery modules ².
• Secondary Power Conversion & DC/DC Architectures: Both platforms take bulk DC from a cart PSU, but the secondary DC/DC assemblies are not one Shop SKU. The LOGIQ F-series Spark R2 DC/DC kit is GE Service Shop part 5653512-S (compatible products extracted as LOGIQ F6 and LOGIQ F8). The Vivid T8 DC/DC board is Shop part 5537638-S, Product Family Vivid T8 ⁸. Adjacent 'DC/DC' titles are not a documented interchange.
• Operator Console & Keypad Matrix: The Vivid T8/T9 utilizes a dedicated cardiovascular control panel (5720091 / 5796802) and a specific numeric keyboard (D0K-V6208L) designed for rapid echo measurements and cardiac calculation packages ⁵. This assembly does not map to the standard LOGIQ F8/F6 keyboard (legacy part 5442979 / D0K-V6227H) ⁶.
• Pencil Probe & Continuous Wave (CW) Doppler: Dedicated cardiac continuous wave Doppler capabilities on the Vivid T8 involve dedicated CW circuitry. When troubleshooting CW Doppler dropouts versus pencil probes, service teams should refer to our dedicated guide on CW Doppler board vs. pencil probe isolation.
• Optional Internal Battery Operation (Smart Start): Cleared under K160078 (March 2016), the Vivid T8 introduced an optional internal battery ('Smart Start') allowing cart relocation without shutting down the OS, utilizing battery technology equivalent to the Vivid S5/S6 (K121063) ². The standard LOGIQ F8 does not incorporate this battery harness. For portable battery diagnostics, see our portable battery and DC/DC board isolation guide.

Which LOGIQ F6/F8 or Vivid T8/T9 board domain does my symptom point to?

When an engineer arrives at a malfunctioning LOGIQ F or Vivid T console, the observed symptoms often cross domain boundaries. A system that fails to boot could have a tripped AC power supply, a shorted DC/DC converter rail, a depleted CMOS battery, or a corrupt solid-state drive. To prevent unnecessary part orders, Table 1 details the five primary functional domains, mapping technical symptoms to verified part numbers and mandatory preliminary checks.

Why is catalog cart PSU 5440428-S not GE Shop 5653512-S, not T8 DC/DC 5537638-S, and not AI Overview EMH350PS18/10009148?

The power architecture of the GE LOGIQ F6/F8 and Vivid T8/T9 cart is a two-stage conversion system: an AC mains-to-bulk-DC power supply unit (PSU) mounted in the lower chassis, followed by an internal DC/DC converter module mounted within the electronic card cage. Online procurement searches for 'logiq f8 power supply' frequently lead service personnel to purchase the wrong assembly due to algorithmic keyword clustering across four distinct part numbers ^{7 8}:

• Catalog 5440428-S (Cart Power Supply): This is the genuine primary AC/DC power supply assembly photographed in Rongtao's catalog across the LOGIQ F8, LOGIQ F6, and Vivid T8 platforms ⁵. Match the etched label; do not republish aftermarket voltage, wattage, or interchange numbers as this SKU's identity. In legacy technical archives, related product notes reference numbers 5440428/10019914 and 5473829 ⁶. Those archived titles are not documented silent swaps into 5440428-S. When an ultrasound will not power on at all (no fans, no LEDs), this is the primary assembly under investigation.
• GE Service Shop 5653512-S (Spark R2 DC/DC Kit): Ranks as the #1 organic result on Google for 'logiq f8 power supply' ⁷. In the official OEM catalog, 5653512-S is designated as the DCDC Power Supply Spark R2 DCDC Kit for SVC, compatible specifically with the LOGIQ F6 and LOGIQ F8 ⁸. This is an internal DC/DC kit, not the main cart AC/DC power supply; ordering 5653512-S to resolve an AC mains input failure will leave the system inoperable.
• GE Service Shop 5537638-S (Vivid T8 DC/DC Board): Ranks as the #1 organic result for 'ge vivid t8 board repair' ⁷. This part is cataloged under Product Family Vivid T8 as the Vivid T8 DC/DC Board ⁸. Shop titles that both say 'DC/DC' are not a documented interchange with F-series 5653512-S or with catalog cart PSU 5440428-S.
• Aftermarket Listing EMH350PS18 / 10009148: The Google AI Overview for 'logiq f8 power supply' states that EMH350PS18 / 10009148 is the F8 power supply shared with LOGIQ P8 and Vivid T8, citing third-party broker listings on DOTmed ^{7 8}. Biomedical engineers must exercise extreme caution here: 10009148 is a third-party commercial power supply manufacturer assembly number, not a Rongtao catalog SKU. Furthermore, conflating it with the LOGIQ P-series is an error; the LOGIQ P8 utilizes a different power architecture detailed in our LOGIQ P5/P6/P7/P9 family guide. Do not purchase 10009148 without physically verifying the etched barcode label on your existing chassis power supply.

If the F8 board-repair SERP ranks USB 5450942-S first, why is that SKU not TI 5620401?

When an ultrasound console displays 'No Probe Connected', fails to identify probe personality EEPROMs, or produces severe acoustic shadowing across an entire transducer aperture, clinical engineers frequently initiate an online search for 'ge logiq f8 board repair'. In DataForSEO SERP analysis, the #1 organic result returned is GE Service Shop part 5450942-S, accompanied by Google AI Overviews suggesting that SUSB / SUSP boards are common failure points ^{7 8}.

This creates a costly procurement error. Part 5450942-S is the LOGIQ F series SUSB PWA-USB Board, an auxiliary printed wiring assembly that manages USB communication ports and operator console peripheral interfacing ⁸. It contains no transducer high-voltage multiplexers, no probe ID read circuitry, and no acoustic signal path. Ordering 5450942-S to resolve a probe recognition problem will not repair the machine.

The verified component-level assembly responsible for transducer interfacing on this platform is the LOGIQ F8 R2 Series TI Board (5620401) ⁵. Legacy archives also title a probe-interface note as 5461248 ⁶; that is a migrated product note, not a documented silent swap into 5620401. When a known-good probe fails on every port, match the etched TI label and send the board for qualified inspection rather than ordering Shop USB 5450942-S.

How do I read inventory 5456663 versus 5456663-5S before ordering an IO board?

Peripheral connectivity, local PACS transmission, and external display synchronization route through the console rear input/output (I/O) panel. In Rongtao's inventory, two distinct IO part numbers exist for this cart family: 5456663 and 5456663-5S ⁵. Biomedical engineers unfamiliar with GE spare part numbering often assume that the '-5S' suffix is an internal inventory tracker or an interchangeable revision.

In Rongtao inventory records, 5456663 is designated for both LOGIQ F6 and Vivid T8 consoles, while 5456663-5S is designated specifically for Vivid T8 ⁵. Both inventory rows carry a 90-day warranty field. Do not treat the dash suffix as a silent swap. Match the etched barcode on the extracted IO bracket before requesting a quote. For broader DICOM and network board troubleshooting, see our DICOM network IO diagnostic guide.

How do Vivid T8/T9 control panel 5720091, keyboard D0K-V6208L, and trackball 42PBNC200 compare across platforms?

Operator control assemblies on the LOGIQ F and Vivid T platforms demonstrate both shared mechanical hardware and completely segregated electronic assemblies:

• Shared Optical Trackball (42PBNC200 / JS36C): The optical trackball module is a genuine shared catalog identity. Rongtao's catalog confirms that part number 42PBNC200 (model JS36C) is labeled across the LOGIQ V3, LOGIQ V5, Vivid T8, and LOGIQ F8 ⁵. Debris on the optical pickup or bearing wear is a common first check, not a remote diagnosis. Clean the module, then send freeze/drift tickets to the control-panel path rather than reprinting that classifier here.
• Vivid T8/T9 Control Panel Assembly (5720091 / 5796802): The primary operator console for the Vivid T8 and T9 carries catalog part number 5720091, with physical nameplates frequently listing 5796802 ⁵. That nameplate pairing is not a proven silent swap, and the assembly is not a documented LOGIQ F8 catalog identity.
• Vivid T8 Numeric Keyboard (D0K-V6208L) vs. LOGIQ F8 Keyboard (5442979 / D0K-V6227H): Beneath the control panel sits an alphanumeric entry keyboard. The Vivid T8 utilizes model D0K-V6208L (catalog partNumber is null) ⁵, whereas the LOGIQ F8/F6 utilizes legacy model D0K-V6227H (part number 5442979) ⁶. Those are distinct identities, not a documented swap.
• The $27 Commercial PC Keyboard Trap: SERP analysis for 'ge logiq f8 board repair' reveals third-party listings from sellers such as AbelSensors marketing standard $27 USB PC desktop keyboards under the search title 'GE Healthcare LOGIQ F8 Expert Keyboard' ^{7 8}. While an external USB keyboard can be plugged into the rear IO panel for emergency text entry during troubleshooting, it cannot be mounted into the console chassis. Purchasing an external consumer keyboard does not repair an unresponsive integrated operator console.

When must I clear Z-2029-2025 (LOGIQ F R3 EFW/Whizz software) instead of replacing a circuit board?

A core principle of clinical engineering is distinguishing electronic component failure from systemic software defects. Before ordering replacement circuit boards or taking a LOGIQ F console out of clinical service for electronic repair, service teams must cross-reference FDA regulatory enforcement data.

In openFDA Medical Device Recall records (snapshot July–August 2026), an active Class II recall exists for this equipment family: Recall Z-2029-2025 (initiated May 16, 2025, classified as Class II Ongoing) ³. The recall affects the GE Healthcare LOGIQ F R3 Ultrasound System (Model/Catalog Number 5943263), manufactured by GE Medical Systems China Co., Ltd. A sibling action, Recall Z-2030-2025, applies to the Versana Premier R3 system (Model/Catalog Number 5938558) ³.

The root cause identified by the FDA for Z-2029-2025 is a software calculation anomaly: when performing obstetric biometric examinations, previous patient biometric data can inadvertently carry over into the Estimated Fetal Weight (EFW) and Whizz calculation algorithms ³. If a sonographer reports that calculations are freezing, inconsistent, or producing unexpected values, biomedical engineers must NOT assume that the host CPU board (inventory 5461693) or RAM has failed. Replacing the CPU or motherboard will not resolve this defect; the facility must verify its software revision and apply the manufacturer's official software correction.

A bounded search of 527 ultrasound-code recall rows (FDA product codes IYN, IYO, ITX) on September 3, 2026 found zero hardware-PN hits naming 5440428, 5620401, 5456663, 5720091, 5653512, or 5537638 ³. Quoted model-number searches in openFDA MAUDE for those board part numbers returned NOT_FOUND ⁴. Empty bounded searches are not incidence, not proof of zero field events, and not evidence that these assemblies are 'stable' or that failures are only normal wear.

What does the 510(k) clearance timeline reveal about LOGIQ F versus Vivid T8/T9 lifecycle status?

A common misconception among healthcare technology management (HTM) departments is that the LOGIQ F and Vivid T platforms are obsolete or unsupported end-of-life systems. An analysis of FDA 510(k) clearances demonstrates that both product lines have maintained an active, ongoing regulatory presence spanning more than a decade. The chart below illustrates the cumulative Traditional 510(k) clearances issued by the FDA under product code IYN (21 CFR 892.1550) for the LOGIQ F lineage versus the Vivid T8/T9 lineage ¹.

As depicted in Chart 1, the Vivid T8/T9 cardiovascular lineage has accumulated six separate 510(k) clearances between 2014 and 2025, including optional battery integration under K160078 ². The most recent clearance, K243628, was granted on February 11, 2025. Clearance K242005 (October 2, 2024) still names LOGIQ F alongside Versana Premier ². Clearance dates are not end-of-support dates and are not a reason to write an F-series EOS playbook; identified-board repair or tested replacement remains the service question on carts still in clinical use.

Why must the live F8 F6 T8 model-page 24-row stock table not be copied into this repair route?

A critical warning for biomedical procurement teams: on Rongtao's live public website, the taxonomy page for GE Healthcare LOGIQ F8 F6 T8 ultrasound board repair & parts currently displays an automated table advertising '24 stock matches' ⁵. The companion Vivid T8/T9 model page is a taxonomy listing, not a second isolation table. Service engineers inspecting the F8 F6 T8 stock table will observe part rows for assemblies such as LOGIQ 7 and LOGIQ 9 DDBF / EBM boards, as well as laptop LOGIQ e CW Doppler cards (5124847 / 5452120-S) and LOGIQ e IO boards (5729603) ⁵.

This table is an artifact of broad database substring matching that captures historical 'LOGIQ' references across disparate product lines. Biomedical engineers must NOT use that 24-row model-page table to order spare parts for a LOGIQ F8 or Vivid T8 console. Installing a legacy LOGIQ 7 beamformer or a laptop LOGIQ e CW board into an F8 cart is mechanically and electrically impossible.

In Rongtao's verified physical inventory as of September 3, 2026, the exact parts stocked for this specific chassis family are restricted to three verified electronic part numbers: 5456663 (IO Board, LOGIQ F6 / Vivid T8), 5456663-5S (IO Board, Vivid T8), and 5461693 (CPU Board, LOGIQ F8), alongside the five photo-backed catalog SKUs (5440428-S, 5620401, 42PBNC200, D0K-V6208L, and 5720091) ⁵. Inventory turns continuously; always confirm active stock and pricing directly through our live quote flow.

Where does Rongtao Medical fit in F6/F8 and T8/T9 board servicing — and where does it not?

Guangzhou Rongtao Medical Technology Co., Ltd. provides multi-brand ultrasound maintenance, circuit board repair, tested replacement parts, and probe servicing for healthcare facilities, independent service organizations, and distributors worldwide. In managing LOGIQ F-series and Vivid T-series fleets, our capabilities and engineering boundaries are defined as follows:

• Where Rongtao Fits: Component-level repair of extracted assemblies matched from etched labels — catalog cart PSU 5440428-S, TI 5620401, inventory IO 5456663 / 5456663-5S, control panel 5720091, and Shop-titled DC/DC kits 5653512-S / 5537638-S only after the physical label is photographed ^{5 8}. Standard board-repair turnaround is 5 to 8 business days, backed by a typically 90-day warranty with final terms confirmed per item at quote ⁵.
• 48-Hour Real-Machine Testing: Current Rongtao terms are a 48-hour real-machine test inside an actual ultrasound system before release, a typical 5–8 business-day board-repair turnaround, and a typically 90-day warranty confirmed per item ⁵. There is no published F6/F8/T8/T9 photo case in the case archive; do not read that test policy as a platform-specific success rate.
• Where Rongtao Does NOT Fit: Rongtao is an independent service organization and parts provider. We are not an authorized GE HealthCare distributor or factory representative unless explicitly stated ⁵. We do not provide OEM proprietary software option license keys, software upgrades, or field safety software patches such as the Z-2029-2025 calculation update.
• Safety Hard-Stops: We strictly advise against unqualified personnel performing live electrical probing on energized switch-mode power supplies. A smoking power supply, charred DC/DC board, or console exhibiting severe electrical smell must be immediately de-energized, disconnected from the wall outlet, and removed from clinical service. Repaired systems must pass comprehensive electrical safety inspection (leakage current and ground continuity per IEC 60601-1 / IEC 62353) before clinical reintroduction.

What technical details and photos are required for a quote-ready handoff?

To receive an immediate, actionable repair or exchange quote without delays caused by part number ambiguities or model-lineage confusion, submit the following technical data to Rongtao's engineering desk via our contact and quote request page:

• System Identification: Provide the exact model name from the front bezel (e.g., LOGIQ F8, LOGIQ F6, LOGIQ F8 Expert, Vivid T8, Vivid T8 Pro, or Vivid T9) and a clear photograph of the rear chassis serial-number rating tag.
• Board Label Photographs (Both Sides): High-resolution photographs of the extracted board, specifically capturing the barcode label, the etched multi-layer PCB part number, and any revision stickers (e.g., distinguishing 5440428-S from 5653512-S, or 5456663 from 5456663-5S).
• Fault Behavior & Error Logs: Detailed description of the failure mode (e.g., total unresponsiveness, momentary fan spin followed by shutdown, specific probe recognition failure, or network transmission timeout), including photos of any on-screen error codes or system dialogs.
• System Power Context: Indicate whether the console is equipped with an internal Smart Start battery module (Vivid T8/T9) and confirm that wall outlet voltage and AC inlet fuses have been verified.
• Service Type, Quantity & Destination: Specify whether your facility requires component-level repair of your existing board or an immediate tested exchange assembly, along with destination shipping details for bonded international dispatch.

Frequently Asked Questions (FAQs)

Q: The Google AI Overview says my LOGIQ F8 uses power supply EMH350PS18 / 10009148. Should I purchase that part instead of 5440428-S?
A: No. Part number 10009148 (model EMH350PS18) is a third-party commercial power supply unit cited on aftermarket marketplace listings (such as DOTmed), which generative AI engines have indexed as a primary reference ^{7 8}. It is not a verified Rongtao catalog assembly. The genuine AC/DC power supply assembly photographed in Rongtao's catalog across the LOGIQ F8, F6, and Vivid T8 is part number 5440428-S ⁵. Always match the etched label on your extracted chassis power supply rather than ordering from automated search summaries.

Q: FDA 510(k) K160277 states that the F6 and F8 have the same hardware. Does this mean I can install a Vivid T8 control panel (5720091) on a LOGIQ F8?
A: No. The K160277 'same hardware' sentence applies exclusively to the general-imaging models listed in that submission: the LOGIQ F8 Expert, LOGIQ F8, and LOGIQ F6 ². The Vivid T8 and T9 represent a distinct cardiovascular regulatory lineage (K141067 through K243628) ². The trackball module (42PBNC200 / JS36C) is a shared catalog identity, but the Vivid T8/T9 control panel (5720091 / 5796802) and numeric keyboard (D0K-V6208L) are labeled T8/T9, not a documented F8 fit ^{5 6}.

Q: My Vivid T8 fails to boot: how do I determine if the fault is cart PSU 5440428-S, DC/DC board 5537638-S, or the host CPU?
A: Follow a systematic isolation sequence with mains removed: (1) If the system is completely dead with zero LEDs and no cooling fan activity on known-good AC mains, the primary suspect is cart PSU 5440428-S ⁵. (2) If the console powers on briefly and then shuts down, suspect a secondary-rail or DC/DC problem — Shop 5537638-S is Product Family Vivid T8, not F-series 5653512-S ⁸; disconnect the TI board and rear IO only after bleed-down to rule out peripheral shorts. (3) If fans run continuously and LEDs stay on but the monitor stays dark with no splash screen, use the host/HDD versus CMOS path. Inventory CPU 5461693 is labeled F8, not a documented T8 CPU identity ⁵.

Q: A LOGIQ F8 will not recognize any connected transducer. Should I order GE Service Shop USB board 5450942-S?
A: No. Part number 5450942-S is the LOGIQ F series SUSB PWA-USB board, an auxiliary USB communication card that manages console peripherals ⁸. It ranks #1 on Google searches for 'ge logiq f8 board repair' due to search engine keyword collisions, but it has no connection to transducer signal routing ⁷. Transducer recognition, probe personality EEPROM reading, and port switching are governed by the Transducer Interface (TI) Board, catalog part number 5620401 ⁵.

Q: What specific photos and technical details must I provide to obtain an accurate repair or exchange quote from Rongtao?
A: To ensure an accurate quotation without relying on ambiguous model-page matching tables, provide: (1) a photo of the console's rear model and serial-number plate; (2) crisp photos of the front and back of the defective circuit board showing the GE barcode label, revision sticker, and etched copper part number; (3) a brief summary of the observed technical symptoms and error messages; and (4) your facility location and preferred delivery timeline ⁵. Contact our technical support team directly at Rongtao Medical Contact & Service Desk.