Logitech Z623 S-00104 Audio Board Power Section Components and Values

User question

M/N: S-00104 audio board pics please sand full hd with power section components name and value

Artificial Intelligence Response

Direct answer to the question

• I can’t send new “full‑HD” photos from here, but there are official internal photos of the S‑00104/Z623 subwoofer amplifier/power board published in the CSA compliance file. I’ve extracted the key “power section” parts with their names and values below. (manuals.plus)
• Important: M/N S‑00104 maps to the Logitech Z623 2.1 system (not Z906). Logitech lists Z906 as M/N S‑00102/S‑00103; community resale listings show Z623 labeled M/N S‑00104. Please confirm your unit is Z623. (support.logi.com)

Detailed problem analysis

• Model identification
  • Logitech’s support page shows Z906 uses M/N S‑00102/S‑00103. Therefore S‑00104 is not the Z906 control console (a frequent mix‑up). A sale listing shows “Logitech Z623 … M/N: S‑00104,” which aligns with field experience: S‑00104 is the Z623 family code on the retail label. (support.logi.com)
• Board architecture (Z623 subwoofer, where the amplifier and PSU live)
  • The subwoofer enclosure contains an isolated SMPS (off‑line flyback/forward) plus the power amplifier PCB on a metal subchassis. CSA’s internal photos clearly show the PSU input EMI network, bridge/primary, bulk capacitor, main transformer, optocoupler feedback and the heatsinked amplifier/power devices. (manuals.plus)

Power section components and values (from the certified “Critical Components List”):

• Input protection and EMI
  • Mains fuses F3/F4: Ceramic, time‑delay T4AH 250 V (Conquer UDA004). (manuals.plus)
  • MOV/Surge suppressor: Panasonic ERZ‑V07D241 (nominal 240 VAC class, 395 V clamp). (manuals.plus)
  • Inrush limiter (NTC): 10S series, 8 Ω, 3 A (Joyin NTC/10S or JNR10S080L). (manuals.plus)
  • X2 (across‑the‑line) film capacitors: 1.0 µF, 275 VAC, 100 °C (e.g., Vishay MKP3382; several approved alternates). There is also an X2 value of 0.47 µF listed among approved parts (used in the EMI network). (manuals.plus)
  • Y1 (line‑to‑earth) capacitors: 470 pF and 150 pF, 250 VAC. (manuals.plus)
  • Common‑mode choke: EPCOS B82734‑R2232‑B30 (EMI filter). (manuals.plus)
• Primary power conversion
  • Rectifier diodes (bridge/primary rectification): 3 A, 400 V (various approved). (manuals.plus)
  • Bulk electrolytic capacitor C1: 150 µF, 400 V, 105 °C. (manuals.plus)
  • Main switching MOSFET Q1: N‑channel, 12 A, 600 V (device family not fixed; approved “various”). (manuals.plus)
  • Optocoupler (feedback): LTV‑817‑8. (manuals.plus)
  • Temperature NTC (sensing, secondary): US Sensor USUR1000‑104H (100 kΩ class). (manuals.plus)
• Magnetic parts
  • Isolation transformer T1: tested 2 kV dielectric; several approved bobbin/transformer builds (details in Attachment 4). (manuals.plus)

Notes:

• The CSA report explicitly includes “Attachment 2 – Photographs” (internal board photos) and “Attachment 3 – Schematics and Layouts,” but the schematics are not publicly released. The photos are available in the file linked above. (manuals.plus)

Current information and trends

• Official photos: The CSA certification package for Z623 contains seven pages of high‑quality internal photos of the PSU/amp assembly you can use as reference for component placement. (manuals.plus)
• Model code clarity (as of February 15, 2026): Z906 M/N codes remain S‑00102/S‑00103 in Logitech’s support database; S‑00104 appears with Z623 in the field. This distinction avoids ordering/repairing the wrong board. (support.logi.com)

Supporting explanations and details

• Expected DC on the primary bulk capacitor (United States mains, ~120 VAC): about 160–170 VDC across C1 at idle (post‑bridge). Ripple and/or low DC here points to rectifier, bulk cap, or line issues.
• Typical PSU fault chain on this platform: inrush NTC cracked/open → overstress of X2 cap or fuse; lightning surge → MOV and primary MOSFET failure; ageing bulk cap → high ripple, audible hum, thermal stress. The optocoupler/LTV‑817 and its TL431‑type reference (not listed but commonly paired) are frequent regulation‑loop suspects; check for leakage and bad secondary caps before replacing the controller.

Ethical and legal aspects

• Safety: This board is an off‑line SMPS with hazardous live primary. Work through an isolation transformer and a series‑bulb/variac limiter. Discharge the 400 V bulk capacitor with a resistor before probing. If you’re not trained on mains SMPS, seek a qualified technician.

Practical guidelines

• How to map your “power section” quickly on the Z623 board (with the CSA photos open): 1) AC inlet → fuses F3/F4 → MOV → NTC (TH2) → EMI X2/Y1 caps + common‑mode choke → rectifier diodes. (manuals.plus) 2) Bridge output → bulk cap C1 (150 µF/400 V) → primary MOSFET/heatsink → transformer T1. (manuals.plus) 3) Secondary side → rectifiers/filters → amplifier rails and speaker connectors (visible next to the heatsinked amp section). (manuals.plus)
• Minimum component replacements after a primary fault
  • If the fuse is open and MOSFET is shorted: replace MOSFET (12 A/600 V class), check/replace gate resistor/snubber, optocoupler, startup parts, bridge diodes, and C1 (150 µF/400 V) as preventive. Re‑test on a 60–100 W series bulb first.
  • If there’s loud hum: ESR‑check secondary electrolytics and verify optocoupler loop stability; confirm X2 caps are in spec (1.0 µF/275 VAC).
• Quick measurements
  • With power off: DMM diode‑check the bridge; measure MOSFET D‑S short; visually inspect X2/Y1 cracks or scorching.
  • With power limited: verify bulk DC ~160–170 VDC; if present but no secondary rails, suspect PWM/control or opto loop.

Possible disclaimers or additional notes

• Values may vary slightly by PCB revision; the CSA “Critical Components List” shows the approved range/alternates but not every reference designator. Always read the markings on your actual parts. (manuals.plus)
• The amplifier IC and some secondary‑side details are not enumerated in the public certificate; schematics exist but are “not for publication” in that file. (manuals.plus)

Suggestions for further research

• If you upload clear photos of your exact board (both sides, power section close‑ups), I can mark up the image and call out the component IDs/values against the CSA photos.
• For model confirmation: check the underside label of the subwoofer and the base of the right satellite (control pod). If it reads Z623 and M/N S‑00104, we’re aligned. (ifixit.com)

Brief summary

• “Full‑HD pics”: use the internal photo set from the Z623 CSA compliance file; it shows the exact PSU/amp assembly. I’ve listed the critical power‑section components and values (fuses T4AH, X2 caps 1.0 µF/275 VAC, Y1 caps 470 pF/150 pF, MOV ERZ‑V07D241, NTC 8 Ω/3 A, bulk cap 150 µF/400 V, bridge 3 A/400 V, MOSFET 12 A/600 V, optocoupler LTV‑817). (manuals.plus)
• Please confirm your unit is the Logitech Z623 (M/N S‑00104). If you can share your board photos, I’ll annotate the exact component names/values on your power section. (support.logi.com)

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.