Schematic for POWER SUPPLY BA4DV2F0102 board

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Direct answer to the question • No complete, manufacturer-released schematic for the BA4DV2F0102 a.k.a. A5GVHMPW-xxx power-supply board has been published in the public domain. • Your best chances are: – Obtain the TV set’s service manual e.g. SANYO FW43D25F, Philips 43PFL4901F7 through authorised channels or pay-wall repositories; it usually contains connector pin-outs, test voltages and sometimes a partial PSU diagram. – Use community repositories ElektroTanya, ManualsLib, Badcaps.net, etc. and cross-reference boards from the same Funai BAx platform e.g. BA3AF0F0102, BA4GP0F01021. – Reverse-engineer the section you need; the board’s silkscreen and typical SMPS topologies make this practical for experienced technicians. Key points • No freely downloadable full schematic has surfaced as of 2024. • Closest substitutes are block diagrams, pin-outs and schematics of sister boards in the same Funai family. • Safe reverse-engineering or board-level replacement are the standard repair paths. Detailed problem analysis 1. Why the schematic is hard to find • Intellectual-property protection: Funai designs these supplies and rarely releases component-level data. • Board-swap service model: authorised centres replace the entire PSU; only troubleshooting charts are supplied. • Safety liabilities: primary side exceeds 400 V DC; uncontrolled distribution of schematics increases risk. 2. What documentation does exist • SERVICE MANUALS – Sanyo FW43D25F, FunaiPhilips 43PFL4901, Magnavox 43MV314—these models all use BA4DV2F0102 or a ±1 revision. – Content: connector tables STBY, 12 V, 24 V, PSON, DIM, BLON, fuse values, test points, limited schematic of the 5 VSTBY converter. • SISTER BOARD SCHEMATICS – Philips BA3AF0F0102 PSU schematic publicly posted on ElektroTanya shares ~80 % of the topology: identical PFC front end, TEA1753-based quasi-resonant primary, TL431optocoupler feedback. Only component numbering differs beyond 600-series designators. • COMMUNITY RESOURCES – Threads on Elektroda and Badcaps identify typical failures open fuse F101, shorted MOSFET Q601Q602, PFC diode D104, secondary Schottky D607A “BR” marking ≈ SMAJ58 or SR560 equivalents. – High-resolution PCB photographs and layout scans on Ebay listings assist in trace following. 3. Functional block map of BA4DV2F0102 Primary side HOT • EMI filter → bridge rectifier BD101 → PFC boost to 380–400 VDC → main PWM IC601, RCD snubber, flyback transformer T601. • Separate flyback for 5 VSTBY always on, IC701. Secondary side COLD • Dual Schottky diode packs D605D607 for 12 V and 24 V rails. • Opto-feedback via TL431 + PC601 to the primary PWM. • PSON and BLON gating transistors around the opto allow the main board to wake the supply. Understanding this map lets you rebuild a partial schematic quickly with continuity checks. Current information and trends • As of 2024 no licit PDF of the exact BA4DV2F0102 schematic has been leaked. Links purporting to provide it usually redirect to pay-per-download sites that ultimately deliver only board photos. • Manufacturers increasingly integrate PFC and PWM e.g. NCP1605TEA1755 one-chip solutions, making modern boards smaller but harder to reverse-engineer. • Component shortages 2021-2023 have led Funai to spin minor PCB revisions; numbering …0102-0, …0102-1, …0102-3 changes but the schematic is functionally identical. Supporting explanations and details • Example of using a sister schematic: the BA3AF0F0102 PDF labels the primary MOSFET as Q301. On BA4DV2F0102 it is Q601, but gate drive, drain sense resistor, and snubber parts match 1:1. • Analogy: Treat the Funai PSU family like car models built on the same chassis—the body panels differ, but the engine and wiring harness largely interchange. Ethical and legal aspects • Respect copyright: do not redistribute service material obtained under non-disclosure. • Observe safety: the primary capacitor ~400 VDC, 82–120 µF retains lethal charge; discharge with a 100 kΩ5 W resistor and verify with a meter. • Comply with local certification ULIEC 62368-1 if you redesign or mass-produce derivative boards. Practical guidelines 1. How to proceed without the schematic a Photograph both PCB sides; import into KiCad or EasyEDA as background; trace nets layer by layer. b Label connectors using service-manual pin-outs; verify voltages with an isolated bench supply. c Compare suspicious sections with the BA3AF0F0102 schematic to identify reference designators. 2. Typical failure workflow • Dead set: Check 5 VSTBY – if absent, measure VCC on IC701 ~12–16 V. Replace startup resistor or the PWM IC. • Blown fuse: Check bridge and PFC MOSFET for shorts; if okay, inspect Q601 and snubber components. • No back-light: Ensure BLON ≈ 3 V from mainboard; verify 24 V rail and LED driver board. Possible disclaimers or additional notes • Even with a sister schematic, part numbers e.g., D607A = “BR” code can vary; always cross-check datasheets and ratings. • Boards sold as “refurbished” may carry factory mod-wires; do not assume silk-screen accuracy. Suggestions for further research • Look for Funai platform codes PL14.16 PL14.32; many power-supply service guides under those codes share near-identical schematics. • Study NXP Nexperia TEA1753 or ON-Semi NCP1397 reference designs—they mirror the BA4D series topology. • Follow repair channels ex: norcal715, PTS Electronics for live teardown videos of Funai PSU variants. Brief summary A factory schematic of the BA4DV2F0102 board has not been publicly released. Practical repair is achieved by: 1 acquiring the host TV’s service manual for pin-outs and partial diagrams, 2 referencing the published BA3AF0F0102 or similar schematic to understand circuit topology, and 3 reverse-engineering only the section under test while observing strict high-voltage safety procedures. These methods, while indirect, are currently the only viable path to schematic-level insight for this power-supply board.

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