Siemens Acuson Sequoia vs Sequoia Silver vs Classic C256/C512 Board Repair by Symptom: Why Catalog TI 11149770 Is Not S2000 TI 10855828 or Marketplace 08239132, Why Silver Panel 11508513 Is Not 11147441, and Why K193257 Relaunch Naming Is Not a Pin-for-Pin Board Map

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• 1. When Is Sequoia Actually Paired with S2000 or SC2000 in FDA Language, and When Is That Pairing Not a Pin-for-Pin TI Map?
• 2. Which Sequoia Board Domain Does My Symptom Point To? (Table 1: Symptom-to-Board Routing Matrix)
• 3. Why Catalog Sequoia TI 11149770 Is Not S2000 TI 10855828 or Marketplace C256 08239132, and Why a Probe-Not-Detected Ticket Is Not Automatically That Board
• 4. Why Catalog Sequoia Silver Panel 11508513 Is Not Sequoia Panel 11147441 Even When the Silver Model Page Ranks on a C256 Query
• 5. Why Catalog PSU 10855235 Is Not S2000 AC 10439494, Not FDA Label Model 11148775, and Not a C256 Silent Swap
• 6. If VA25A/B Overestimates 2D-Trace Circumference, Why Z-0547-2022 Is Not a Reason to Order 11149770
• 7. If EDD Is Wrong Because MSD/GSD Were Averaged, Why Z-1330-2021 and Label 11148775 Are Software Gates Rather Than a PSU Order
• 8. Classic Sequoia Safety and Probe Exception Gates: C512 Shock Hazard, Auxiliary CW Overheat, and 17L5HD Transducer
• 9. Siemens Acuson Sequoia, Silver, Classic C256/C512, and S2000 Part Number Collision and Sourcing Matrix (Table 2)
• 10. Model Taxonomy and Catalog Stock Isolation: Why Model Pages Group SKUs, and Why Inventory Currently Shows Zero Photo-Matched Stock
• 11. Where S2000, X300, Juniper, and C256 System 30 Disk Errors Go, and Why K202683 Naming Sequoia Is Not a Board-Swap License
• 12. Where Rongtao Fits, and Where It Does Not — Including Quote-Ready Photos
• 13. Frequently Asked Questions (FAQs)

1. When Is Sequoia Actually Paired with S2000 or SC2000 in FDA Language, and When Is That Pairing Not a Pin-for-Pin TI Map?

In biomedical engineering procurement and multi-vendor fleet maintenance, search queries frequently blend model names across generational divides. An engineer dealing with an acquisition failure on an Acuson Sequoia cart is routinely presented with search results, marketplace listings, and teardown guides that treat classic C256 systems, modern 2020 relaunch carts, and Acuson S-family platforms as an interchangeable parts pool ^{7 8}. To establish technical boundaries, one must examine the regulatory foundations documented in the U.S. Food and Drug Administration (FDA) 510(k) premarket notification database ^{1 2}.

The modern generation was introduced under Premarket Notification K193257 (decision date 31 January 2020), wherein applicant Siemens Medical Solutions USA, Inc. cleared the ACUSON Sequoia Diagnostic Ultrasound System as a Traditional 510(k) under product code IYN (21 CFR 892.1550, Pulsed Doppler Ultrasonic Imaging System), with subsequent classifications under ITX (transducers, 21 CFR 892.1570) and IYO (pulsed echo, 21 CFR 892.1560) ^{1 2}. That named 2020 clearance is not a silent SKU swap for classic C256/C512 08xxxxxx boards, and subsequent ITX/IYO codes are classification, not a probe-for-TI license.

This 2020 clearance must not be conflated with the classic legacy generation manufactured by Acuson Corporation before and immediately following its acquisition by Siemens. Official records document seven named classic ultrasound Sequoia clearances spanning 2002 to 2007: K022567 (13 August 2002, Traditional IYN, applicant Acuson Corp., SEQUOIA SIGNATURE II); K032114 (21 July 2003, Traditional IYN, SEQUOIA 8.0); K041319 (7 June 2004, Special IYN); K051139 (13 May 2005, Traditional IYN); K052410 (22 September 2005, Special IYN); K063085 (14 November 2006, Special IYO); and K072365 (17 October 2007, Traditional IYN, SEQUOIA PLUS) ². Classic marketplace designations such as C256 and C512 do not appear as 510(k) device_name values in this extract; they are aftermarket chassis titles, not a second clearance that licenses 08xxxxxx boards into a 2020 cage.

Confusion between modern Sequoia and the Acuson S-family stems directly from multi-system regulatory submissions. Under Special 510(k) K202683 (decision date 15 October 2020), Siemens grouped the ACUSON Sequoia with the ACUSON SC2000, ACUSON Freestyle, ACUSON S1000/S2000/S3000, ACUSON P200, ACUSON P500, and ACUSON NX3 on one device-name row ². Combined clearance language is S-family regulatory history, not a pin-for-pin card-cage map. Catalog TI 10855828 is labeled S2000; catalog TI 11149770 is labeled Acuson Sequoia. This page does not invent a seating or pin map.

Subsequent regulatory filings further refine this taxonomy. Premarket Notification K223735 (decision date 6 February 2023, Special IYN) is the first filing in this lineage to add ACUSON Sequoia Select ². Most recently, Traditional clearance K260844 (decision date 16 June 2026, product code IYN with subsequent ITX/IYO/OBJ/OIJ/QIH) continues to name the ACUSON Sequoia, ACUSON Sequoia Select, ACUSON Origin, and ACUSON Origin ICE ². Later Sequoia naming means this page is not an end-of-support playbook for the 2020 family; it is also not a license to treat Sequoia Select or Origin as photographed Sequoia SKUs. Catalog evidence on this snapshot is Sequoia and Sequoia Silver assemblies, not Select or Origin.

2. Which Sequoia Board Domain Does My Symptom Point To? (Table 1: Symptom-to-Board Routing Matrix)

Effective ultrasound triage requires isolating the failure into an exact functional domain before removing circuit boards from the card cage. Table 1 maps reported clinical symptoms across the Acuson Sequoia, Sequoia Silver, and classic C256/C512 platforms to suspect assemblies, platform exclusivity boundaries, and verified escalation paths.

3. Why Catalog Sequoia TI 11149770 Is Not S2000 TI 10855828 or Marketplace C256 08239132, and Why a Probe-Not-Detected Ticket Is Not Automatically That Board

The Transducer Interface (TI) is the console-side assembly that mates clinical transducers to the scanner. Rongtao's photo-backed catalog SKU for that labeled family is TI Board 11149770 (model: Acuson Sequoia, partNumber: 11149770) ⁵.

When an Acuson cart displays a 'transducer not recognized' error or presents an entirely black acoustic sector, service technicians frequently encounter three conflicting part-number paradigms in search results and legacy literature:

• Catalog Acuson Sequoia TI Board: Catalog 11149770 is labeled model Acuson Sequoia, partNumber 11149770 ⁵. That catalog label is not a 510(k) pin map from K193257 and is not marketplace 08239132 ².
• Catalog S2000 TI Board: Catalog 10855828 is labeled model S2000 ⁵. In Rongtao's brand hub (Siemens Acuson board symptom hub), 11149770 was listed alongside 10855828 in an S2000 / SC2000 row ⁶. That leftover listing is a taxonomy error, not a swap license. Combined K202683 naming does not make 11149770 an S2000 board.
• Classic C256/C512 marketplace titles: eBay, DOTmed, and broker listings sell 08239132, 08239142, or 8232062 under Sequoia board titles ^{7 8}. Those 08-prefix strings are not Rongtao catalog SKUs this snapshot. Adjacent suffixes are not silent swaps for catalog 11149770. This page does not invent a bus, card-guide, or voltage map.

A probe not detected ticket must not trigger an immediate board purchase. Inspect the receptacle. Connect a verified known-good transducer to more than one port; if the second probe enumerates correctly, route the original transducer to probe repair rather than ordering TI identity from a search snippet. Only when multiple known-good probes fail across ports should the technician match the etched label and evaluate catalog TI Board 11149770. Connector-tree diagnosis is not reprinted here; the migrated note Sequoia probe connector board 11149770 is a historical 11149770 title, not a second catalog SKU.

Quoted openFDA MAUDE searches on 9 September 2026 for device model numbers 11149770, 10855235, 11147441, 11286732, 11508513, 08239132, 08239142, 08231642, and 8232062 returned zero records (NOT_FOUND) ⁴. Passive-surveillance reports do not measure incidence, do not establish causality or comparative board reliability, and empty quoted searches are not proof that these assemblies never fail on the bench.

4. Why Catalog Sequoia Silver Panel 11508513 Is Not Sequoia Panel 11147441 Even When the Silver Model Page Ranks on a C256 Query

A prominent search discrepancy occurs on the query siemens acuson sequoia board repair: Google's organic result #1 is currently Rongtao Medical's own model catalog page for the Acuson Sequoia Silver ⁷. That model page also ranks at position #7 on queries specifically targeting classic C256 repair ⁷. This search-engine clustering has led procurement teams to assume that 'Sequoia Silver' is simply an alternate marketing label for standard Sequoia or refurbished classic carts.

Hardware inspection refutes this assumption. Rongtao Medical's verified parts catalog maintains two distinct control console assemblies:

• Standard Acuson Sequoia Control Panel: Catalog Control Panel 11147441 (partNumber: 11147441, model: Acuson Sequoia) ⁵.
• Acuson Sequoia Silver Control Panel: Catalog Control Panel 11508513 (partNumber: 11508513, model: Acuson Sequoia Silver) ⁵.

Dual catalog labeling is two assemblies, not one interchangeable console deck. Catalog 11147441 is labeled Acuson Sequoia; catalog 11508513 is labeled Acuson Sequoia Silver. This page does not invent encoder, harness, or firmware interchange. Match the etched label and the cart nameplate before ordering.

In parallel, touch input is separated from the physical keyboard. Catalog Touch Screen 11286732 (partNumber: 11286732, model: Acuson Sequoia) is an independent display module mounted above the physical deck ⁵. If the physical trackball and keys respond but touch buttons fail to register, replace or repair Touch Screen 11286732; do not replace the primary control panel. Full control deck triage is detailed on ultrasound control panel touch and display failure.

5. Why Catalog PSU 10855235 Is Not S2000 AC 10439494, Not FDA Label Model 11148775, and Not a C256 Silent Swap

Chassis power distribution on a labeled Acuson Sequoia cart is matched to catalog Power Supply 10855235 (partNumber: 10855235, model: Acuson Sequoia) ⁵. This page does not publish unverified rail voltages. The FDA Z-1330-2021 product label records cart power input 100–240 V as a system nameplate fact, not as a subassembly PSU specification ³.

Three dangerous procurement substitutions recur in aftermarket sourcing:

• Substitution with Acuson S2000 AC Power Supply: Catalog and leftover inventory identify AC Power Supply 10439494 as S2000 / S2000/S3000, not Acuson Sequoia ⁵. Inventory also carries S2000 PSA 10440226 as a different labeled assembly. Adjacent Siemens leftovers are not a silent swap for catalog 10855235.
• Confusion with FDA Product Label Model 11148775: In FDA recall records (specifically recall Z-1330-2021), the agency lists 'Model: 11148775' ³. Field service engineers searching for Sequoia power supplies frequently encounter this number and assume 11148775 is a high-capacity replacement PSU. In Siemens manufacturing nomenclature, 11148775 is the top-level regulatory system model number stamped on the chassis serial plate. It is not an orderable power supply assembly.
• Substitution with classic C256 power modules: Catalog has no classic C256 PSU photo this snapshot. Catalog 10855235 is labeled Acuson Sequoia. Marketplace C256 titles are not a silent swap.

If fans or panel LEDs respond but the scanning UI never appears, do not condemn catalog 10855235 from that symptom alone. Send power-present / no-scanning-UI tickets to the host/HDD versus CMOS boot path and rails-down isolation to the cart power-supply no-power path.

6. If VA25A/B Overestimates 2D-Trace Circumference, Why Z-0547-2022 Is Not a Reason to Order 11149770

When an ultrasound system produces inaccurate clinical measurements, clinical engineering departments frequently suspect transducer interface degradation, analog beamformer drift, or analog-to-digital converter failure. On the ACUSON Sequoia, however, an observed measurement error on software versions VA25A or VA25B is governed by an active FDA regulatory recall ³.

Under FDA Recall Z-0547-2022 (Open, Classified / Class II Ongoing, recall event ID 89139, initiated 12 November 2021), the firm action covered 1,161 ACUSON Sequoia ultrasound systems with software version VA25A/B, 510(k) K201462, product code IYN, FDA-determined cause software design ³. Quantity 1,161 is not 2D-trace incidence. The FDA Class 2 page states the manufacturer reason as:

Due to a calculation error in the measurement when using 2D trace (manual trace) tool. The trace circumference value is overestimated and may potentially result in misdiagnosis of a patient's condition.— U.S. FDA Class 2 Device Recall Z-0547-2022, manufacturer reason for recall

This recall is a software gate: VA25A/B 2D-trace circumference overestimation is a manufacturer software-design defect, not a reason to condemn TI 11149770 or a beamformer. Coordinate the OEM software correction. Do not reprint measurement workarounds as a clinical protocol, and do not publish serial-number lists from the recall record.

7. If EDD Is Wrong Because MSD/GSD Were Averaged, Why Z-1330-2021 and Label 11148775 Are Software Gates Rather Than a PSU Order

A parallel regulatory exception gate involves obstetrical gestational calculations. Clinical staff using an ACUSON Sequoia may report that the system outputs an erroneous Estimated Delivery Date (EDD) or gestational age when measuring early gestational sacs.

Official FDA records designate this as FDA Class II Ongoing Recall Z-1330-2021 (recall event ID 87362, initiated 4 February 2021) covering 1,172 ACUSON Sequoia systems, 510(k) K193257, product code IYN, FDA-determined cause software design change ³. The Class 2 page identifies product-label model 11148775 and does not name a board SKU. Quantity 1,172 is not EDD-error incidence. Do not publish the serial list from that record.

The FDA manufacturer reason is that the system averages Mean Sac Diameter (MSD) and Gestational Sac Diameter (GSD) into the Estimated Date of Delivery (EDD) calculation, which may produce an incorrect EDD ³. When the recall names Model: 11148775, that string is the cart label, not catalog PSU 10855235 and not TI 11149770. Coordinate the OEM software correction. Do not reprint customer measurement workarounds as a protocol.

8. Classic Sequoia Safety and Probe Exception Gates: C512 Shock Hazard, Auxiliary CW Overheat, and 17L5HD Transducer

Clinical engineering departments servicing legacy fleets occasionally encounter historical recall records when researching Acuson Sequoia fault codes. It is vital to separate classic hardware safety notices from modern 2020 relaunch servicing:

• Classic C512 manufacturing-test shock hazard (Z-2115/Z-2116/Z-2117-2011): FDA recalls Z-2115-2011, Z-2116-2011, and Z-2117-2011 (event ID 53013, initiated 15 May 2009, Terminated) name classic Sequoia 512, Sequoia 512SS, and software 12.X GI systems as a manufacturing-test shock-hazard gate ³. Those rows are not a 2020-relaunch board map and are not a reason to order catalog 11149770 or 10855235.
• Auxiliary 2 MHz CW transducer overheat (Z-1961-2011): FDA recall Z-1961-2011 (event ID 52928, initiated 21 March 2009, Terminated) names the Auxiliary 2 MHz CW Transducer (part number 8251046) on classic Sequoia software 12.X, quantity 2,591 ³. That is a probe/CW gate, not a reason to order TI 11149770. Route dedicated-CW isolation to the CW board versus pencil probe path and probe repair.
• 17L5HD transducer image doubling (Z-2230-2008): FDA recall Z-2230-2008 (event ID 48695, initiated 6 June 2008, Terminated) names the 17L5HD transducer (part number 10035724) used with classic Sequoia models including 082xxxxx series, quantity 388, for double/overlapped image ³. That is a probe gate, not a TI 11149770 order.

9. Siemens Acuson Sequoia, Silver, Classic C256/C512, and S2000 Part Number Collision and Sourcing Matrix (Table 2)

Table 2 provides an extractable technical cross-reference of verified catalog circuit boards, classic marketplace numbers, platform exclusivity rules, and recommended sourcing actions across the Siemens ultrasound ecosystem.

10. Model Taxonomy and Catalog Stock Isolation: Why Model Pages Group SKUs, and Why Inventory Currently Shows Zero Photo-Matched Stock

Rongtao model taxonomy pages group SKUs from catalog model strings. Use /brands/siemens, then /models/siemens-acuson-sequoia and /models/siemens-acuson-sequoia-silver ⁵. Those pages are SKU dumps: the Silver model page currently ranks on Sequoia and C256 repair queries, which is a search collision, not proof that Silver parts belong in a C256 cage. Catalog photographs of five Sequoia assemblies establish labeled identity. The current inventory snapshot shows zero exact matching rows for those five photographed Sequoia part numbers ⁵. Stock turns; a catalog photo is not guaranteed shelf stock.

Current Siemens inventory stock consists primarily of legacy and transitional platforms, including Acuson G40/G50/G60 boards (e.g., A48 BWPR 07842102, A46 RXBF 07851624), Acuson X300 / Omini modules (e.g., BE 10010906, RC 10010907, AC power supply 10132402), Acuson S2000 / S3000 assemblies (e.g., IO 10040949, RC 10439476, AC power supply 10439494), Acuson NX3 boards (RC 10785501), and Acuson Juniper subassemblies (DV 1977242V-83) ⁵. Inventory turns continuously in a high-throughput biomedical repair facility. Clinical engineers requiring modern Sequoia components must never assume immediate stock from an old product page; always verify live inventory and reserve repair capacity through the quote desk via /contact.

11. Where S2000, X300, Juniper, and C256 System 30 Disk Errors Go, and Why K202683 Naming Sequoia Is Not a Board-Swap License

To prevent cross-family pollution, tickets involving non-Sequoia platforms or host computing failures must be routed to their dedicated engineering parent paths:

• Acuson S2000 / S3000 Tickets: If troubleshooting TR, RC, RM, or PSA modules in an S2000 card cage, follow the Siemens Acuson S2000 versus S3000 board path. Combined regulatory clearance K202683 is regulatory history, not a license to order S2000 TI 10855828 into a Sequoia cart.
• Acuson X300 / X150 / X700 Tickets: Route 4D beamforming, BE back-end, and DC power failures to the Siemens Acuson X300 versus X150 board path.
• Acuson Juniper Tickets: Juniper digital processing faults and Cardiac SR software notices (FDA Recall Z-1599-2024) belong on ultrasound DICOM and network IO path.
• Classic C256 System 30 tickets: DOTmed and related C256 threads report a System 30 error ^{7 8}. Treat that label as host/storage isolation demand, not a remote diagnosis and not TI 11149770 identity. Route those tickets to the ultrasound host/HDD versus CMOS boot path.

12. Where Rongtao Fits, and Where It Does Not — Including Quote-Ready Photos

Rongtao Medical provides component-level circuit board diagnostics, PCB repair, and verified replacement modules for medical imaging equipment across 140+ countries ⁵. Clarity regarding technical scope and limitations ensures rapid turnaround and reliable clinical restoration:

• Where Rongtao Medical Fits: Component-level repair of physical PCB faults on Acuson Sequoia TI Board 11149770, Power Supply 10855235, Control Panel 11147441, Silver Panel 11508513, and Touch Screen 11286732. Typical board-level repair turnaround is 5 to 8 business days, backed by a typically 90-day warranty and rigorous 48-hour continuous real-machine testing on dedicated diagnostic ultrasound test fixtures ⁵.
• Where Rongtao Medical Does Not Fit: Rongtao Medical is an independent service organization and parts provider, not an authorized agent of Siemens Healthineers or Acuson Corporation. Rongtao does not sell or distribute proprietary OEM clinical software option keys, does not issue regulatory software patches for FDA recalls Z-0547-2022 or Z-1330-2021, and does not conduct unqualified on-site servicing that bypasses electrical safety interlocks.

To initiate an expedited repair evaluation or confirm live catalog availability, provide the quote desk with four essential data points via /contact:

1. Clear Macro Photographs of Both Sides of the Board: High-resolution photographs capturing the entire PCB layout and close-ups of soldered surface-mount components, showing any visible discoloration, burnt IC packages, or cracked solder joints.
2. Etched Part Number and Barcode Label: Exact legible photographs of the manufacturer barcode label, part number (e.g., 11149770, 10855235, 11147441, 11508513), and etched board revision suffix.
3. Chassis Serial Plate & Software Version: Photograph of the cart serial plate (confirming whether the cart is modern Sequoia 11148775, Silver edition, or classic C256) and the software build displayed in the system diagnostics menu.
4. Detailed Fault Log and Error Description: Full text or screen capture of any displayed error codes, boot failure symptoms, probe socket behaviors, and AC supply rail status.

13. Frequently Asked Questions (FAQs)

Q1: The Sequoia AI Overview cites Rongtao's Siemens hub and iFixit shows C256. Should I order catalog 11149770 into a C256 cage, or 08239132 into a 2020 Sequoia?
A1: No. Catalog TI 11149770 is labeled Acuson Sequoia. Marketplace 08239132 / 08239142 are classic C256 aftermarket titles, not catalog SKUs this snapshot. K193257 names the 2020 ACUSON Sequoia; it is not a pin-for-pin license to move 08xxxxxx boards into a 2020 cage or 11149770 into a C256 cage. Match the etched label.

Q2: K223735 names Sequoia Select and the Silver model page ranks first. Can I fit catalog Silver panel 11508513 in place of 11147441, or leftover S2000 TI 10855828 as a silent swap for 11149770?
A2: No. Catalog 11147441 is labeled Acuson Sequoia and catalog 11508513 is labeled Acuson Sequoia Silver: two assemblies, not one. Catalog S2000 TI 10855828 is labeled S2000, not Sequoia. K223735 adding Sequoia Select is not catalog Silver, and K202683 grouping Sequoia with S2000 is S-family history, not a board-swap license.

Q3: The cart shows no image at power-on: is that catalog 11149770, 10855235, host/HDD, a C256 System 30 disk error, or an iFixit card-cage procedure?
A3: Split the domains. Zero LEDs and dark fans: match the etched supply against catalog 10855235, then use the cart PSU parent. Fans or LEDs present but no scanning UI, including classic C256 System 30 forum tickets: use the host/HDD path, not a TI order. iFixit C256 card-cage pages are demand that C256 tickets exist; do not scrape DIY procedures. Suspect catalog TI 11149770 only after the cart is in the scanning UI and known-good probes fail across ports, and only after the etched label matches 11149770.

Q4: VA25A/B overestimates 2D-trace circumference, or EDD is wrong from MSD/GSD averaging: is that Z-0547-2022 / Z-1330-2021 software or a reason to replace 10855235?
A4: Both issues are official FDA Class II software recalls (Z-0547-2022 and Z-1330-2021). Circumference overestimation on software VA25A/B and gestational age errors resulting from averaging MSD and GSD are algorithmic calculation defects in system code. They are not hardware failures. Replacing Power Supply 10855235, Transducer Interface 11149770, or beamformer boards will not alter the calculation bug. These issues are resolved exclusively by applying official OEM software updates.

Q5: What photos and information should I send to get a Sequoia quote without using an 08239132 dump or a 90-to-180-day marketplace offer?
A5: Provide the quote desk with: (1) high-resolution photos of both sides of the removed PCB; (2) clear photos of the barcode label showing the exact part number (for example 11149770, 10855235, 11147441, 11508513) and revision suffix; (3) a photo of the cart serial plate; and (4) the observed fault and displayed error codes. Rongtao Medical's current terms are a standard 5 to 8 business-day board-repair turnaround, a typically 90-day warranty, and 48-hour real-machine testing, confirmed per item at quote. Marketplace 90-to-180-day copy and universal C256 interchange are competitor commercial terms, not Rongtao offers.