MEAN WELL HLG-320H Power Supply Remaining Component Identification

As previously covered in the actual teardown, this HLG-320H was definitely dead. Now that I've slacked off long enough after taking these pictures, let's see what else is inside.

The IP65 rating for this model comes from the current limit and voltage set trimpots being accessible through these little capped tubes that open to the upper cover.

The PCB information in the above image has the following silk screen snippets: "HLG-320HA-R10", "PCB:HLG-320HB", and the date "2014/06/10".

Secondary side synchronous rectification is provided by two TO-220 FETS

Device: Advanced Power Electronics Corp AP9963GP.

Back on the primary side, the input bridge rectifier in front of the various common-mode chokes.

Device: Shindengen US10KB80R (repeatedly archived, eventually to Mouser).

The PFC boost rectification diode or something just behind the inrush bypass relay.

Device: NXP (now WeEn Semiconductor) BYT79X-600. I guess NXP's 2015 acquisitions required that it spin off WeEn for power electronic components similar to Nexperia for logic devices.

Major electrolytic caps: primary side bulk desoldered and an array of secondary side output bypass. Also a differential mode choke on the positive rail

Devices: Nippon Chemi-Con 450 V, 220 uF, 3k hours at 105°C and Rubycon 16 V, 1800/2200 uF, 105°C.

A better look at the NTC inrush limiter bypass relay next to the boost inductor and hole where the 450 V cap went.

Device: TE PCH-112D2 (5 A, 12 V coil, wash-tight).

Just ahead of the input filtering is a 6.3A fuse.

Round out the survey with the two optocouplers for feedback.

Device: LITE-ON LTV-817.

So that rounds out this destructive analysis of the dead electronics. So much for writing in a timely fashion, but there it was!

Comments

Post a Comment

Popular posts from this blog

A Multi-Pronged Approach to BK4819 HT Band Expansion

As previously discussed, the BK4819 simplex FM transceiver chip with specified coverage of 18-660 and 840 to 1300 MHz covers a lot of Region 2 amateur radio bands with generally accepted FM operation: 10 m, 6 m, 2 m, 1.25 m, 70 cm, 33 cm, and 23 cm. The most popular models of amateur-oriented HTs using the chip generally only cover the popular VHF/UHF split with 2m and 70cm (and wide enough filters to support nearby business/public safety bands). How this is implemented varies in cost, complexity, and potential for effective modification. Of course, it's not really a modification if it's an actual product, but more on that further in.
Read more

Hardware Filter Modifications for Quansheng UV-K5 Band Extensions?

The Quansheng UV-K5 ( product page archive ) handheld transceiver has been notable in cheap amateur radios of 2023 by using both a wideband FM chip BK4819 ( product page archive ). With support of 18-620 and 840-1200 MHz half-duplex with 6.25/12.5/20/25 kHz channel spacing, this puts the chip in the range of five ITU Region 2 amateur bands (10m, 6m, 2m, 1.25m, 70cm, 33 cm) and spitting distance from a sixth (23 cm). Presumably hitting 4m and the rare 8m would be within reason as well. The easily hackable firmware indicates at least nominal receive capability up to 1300 MHz, though!
Read more

MEAN WELL HLG-320H Power Supply Actual Teardown and Failure Investigation

Image
Last left off in the preview "teardown" despairing over the potting was my failed MEAN WELL HLG-320H. Then came a great need for mindless stimulation after a day of work and I tried cracking the case again. After the successful prying came picking and cutting away at the potting material to see what's what. Here's what's inside! Image warning: there's a lot to get through this whole device. Click on the photo for the full Blogger resolution. There you go, just a bit more force and the top plate comes off.
Read more