Comments on: LG Home Theater Model DH3140S – Dead on Arrival, Now Repaired

By: Vusi S

Vusi S — Sat, 27 Dec 2025 06:31:19 +0000

Hello Sir, I have been looking for a service manual for this DH314oS.
Board is burnt near IC 701 and 702 so a diagram can help me to rewire it.
Please assist where can I buy the diagram cause I tried several sources with no luck

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By: Humphrey Kimathi

Humphrey Kimathi — Tue, 26 Aug 2025 15:56:28 +0000

In reply to Tito Kanshulu.

Thank you so much. Yes, it’s been a while, but I’m glad to be back. I truly appreciate your encouragement—it motivates me to keep sharing. Blessings!

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By: Humphrey Kimathi

Humphrey Kimathi — Tue, 26 Aug 2025 15:07:20 +0000

In reply to AdamS.

Very nice Adams, you have put it so well.... Thanks a lot, and it’s great to be back sharing again!

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By: Humphrey Kimathi

Humphrey Kimathi — Tue, 26 Aug 2025 15:03:25 +0000

In reply to Henrique Jorge G. Ulbrich.

Thank you so much for the kind words, I really appreciate it. FB902 is not an IC—it’s a ferrite bead jumper (like a small inductor or zero-ohm link) used for filtering and as a convenient connection point. In this repair, I lifted it to isolate the VCC supply for testing. That’s why you may not have found much info on Google—it’s usually marked as FB (Ferrite Bead) on schematics rather than as a standard component.

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By: Henrique Jorge G. Ulbrich

Henrique Jorge G. Ulbrich — Tue, 26 Aug 2025 13:21:31 +0000

In reply to AdamS.

Thanks, AdamS.It elucidated it.

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By: AdamS

AdamS — Tue, 26 Aug 2025 10:28:51 +0000

As per the circuit diagram above, FB902 is simply the circuit reference of the inductor (or ferrite bead - hence "FB") that connects the main supply to IC902.

Nice to see you back again Humphrey!

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By: Tito Kanshulu

Tito Kanshulu — Tue, 26 Aug 2025 08:55:52 +0000

In reply to Parasuraman S.

Welcome to the fold Humphrey Kimathi. It has been a long time since we heard from you. Your articles are quite refreshing. Keep the good work

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By: Henrique Jorge G. Ulbrich

Henrique Jorge G. Ulbrich — Mon, 25 Aug 2025 14:33:24 +0000

Very good, Humphrey. For both, the repair article and your English writing. I didn´t got to understand what the FB902 is. Is it an IC? I tried a Google search but didn´t succeed.

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 25 Aug 2025 04:46:21 +0000

In reply to Imoudu.O.

Ah, thank you, my friend. Yes, it has been a little while, but I’m glad to be back sharing again. I truly appreciate your patience and support. The “other side” is coming soon—stay tuned! Have a blessed day too.

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By: Humphrey Kimathi

Humphrey Kimathi — Mon, 25 Aug 2025 04:41:59 +0000

In reply to Muykit.

Thank you so much for your thoughtful comment . You are right—tracking down short circuits, especially on the secondary side, can be one of the toughest parts of repair work. It takes patience and step-by-step elimination to get to the real culprit.
I also share your sentiments about the older DVD players—they were solid machines, easy to service, and with spare parts readily available. Truly a blessing to technicians in those days. Nowadays, with digital TV and compact SMD-based devices like set-top boxes, repairs can be more challenging, but the principles remain the same: systematic troubleshooting, proper tools, and persistence.
I’m glad to hear you’re still taking on repairs even in the village setting—keep it up, brother. May you continue to enjoy the craft and bless others with your skills!

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