Fan repair and component identification 1600A NH & FBH5AA FDMP & W10B 89F - Page 1
Forum section: electronics / repair

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 01, 2019, 11:48:39 pm
content: Recently my PSU went bad and at the time being used it inject 52V to a 24V fan (9BMC24P2G001). As that fan cost some bucks i try to fix it.I removed every resistor and diode to test them outside PCB circuit. So far i found the following problems:PWM fet shorted, the one that connects to PWM Pin cable - Replaced220 Ohm resistor shorted on same fet line - ReplacedZenner diode open on latch pin - ReplacedMCU receive 5V at VCC andoutputinputs 5V at GPIOs.1.2V at each motor phase20mA current draw - Same before bad parts replacement0.6V at PWM pin, should be 24VNow there are some components i still have to check, but the number lead me to no results of what IC is:1600A NHFBH5AA FDMP (Not sure about last FDMP part - very fade)W10B 89FAlso if anyone have experience on that kind of repair, please advice

author: coromonadalix
author_rank: Super Contributor
timestamp: July 02, 2019, 03:31:12 am
content: Try to clean the pcb with acetone, it wouls surely help to remove all this gunkIn a vented area ...

author: fzabkar
author_rank: Super Contributor
timestamp: July 02, 2019, 07:09:30 am
content: TPN1600ANH, Toshiba, N-ch MOSFET, 100V, 36A, 13 mOhm Rdson, TSON-8:https://toshiba.semicon-storage.com/info/docget.jsp?did=13538&prodName=TPN1600ANHFDMC86139P, Fairchild, P-ch MOSFET, -100v, -15A, 67 mOhm Rdson, MLP 3.3 x 3.3:pdf.datasheetcatalog.com/datasheet/fairchildsemiconductor/FDMC86139P.pdfEW-106B, Asahi Kasei, Hall Effect IC, SOT89, marking W10B:https://www.akm.com/akm/en/file/datasheet/EW-610B.pdf

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 02, 2019, 01:02:45 pm
content: Quote from: coromonadalix on July 02, 2019, 03:31:12 amThanks for the tip, will do.Quote from: fzabkar on July 02, 2019, 07:09:30 amThats awesome! Can i ask how you reach them?EW-106B: VIN: 14V | VOUT = 5V, i guess they are okMeanwhile i have another component that lead me wrong to single zenner or transistor: 3H, what's those?

author: fzabkar
author_rank: Super Contributor
timestamp: July 02, 2019, 09:59:06 pm
content: RB530XNTR, ROHM Semiconductor, 3 x Schottky Barrier Diodes, 30V, 100mA, marking 3H, SOT-363:https://www.rohm.com/datasheet/RB530XN/rb530xntr-ehttp://www.google.com/search?q=3h+filetype%3Apdf+diodehttp://www.google.com/search?q=W10B+filetype%3Apdfhttp://www.smdmark.com/en-US/search/code?id=w10bhttp://search.datasheetcatalog.net/key/1600ANHhttp://search.datasheetcatalog.net/key/139P

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 03, 2019, 12:55:27 am
content: MCU is not okThe 5Vs are inputs from Halls. Not outputing signals to gates nor detected by programmer.Think that's the final step to put that working again.Asked Sanyo for firmware, not much hopes but we never know without try. Fingers crossed

author: fzabkar
author_rank: Super Contributor
timestamp: July 03, 2019, 02:55:13 am
content: That's bad luck with the MCU. :-( I doubt that Sanyo will help you.

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 03, 2019, 03:11:24 am
content: Quote from: fzabkar on July 03, 2019, 02:55:13 amMe too, hope they reply at least.In extreme case i can open the other good-state fan and dump firmware, compare, do meassures. But sacrifice one fan to save only one don't seens good to me, can't do it without melt the sealed axis, which have to be melted again to put in place. In best scenario i can try solder jump wires at MCU pins and dump it, but MCU stays under the motor coil, which have small space to run a iron. Remove MCU with hotair is possible, but plastic ABS and coil holder will not survive without a new face OR maybe warp tons of isolator arround...

author: fzabkar
author_rank: Super Contributor
timestamp: July 03, 2019, 06:43:47 am
content: It could be that the PIC has a security fuse which prevents code dumping.

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 03, 2019, 01:23:07 pm
content: Quote from: fzabkar on July 03, 2019, 06:43:47 amGood call. This will end in buy another most likely.This fan is well built, i have open other fans in past and circuits are much more simple with few components and single side PCB, this one have a more complex circuit. They have reverse current protection, sadly they don't have a overvoltage protection.

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 05, 2019, 01:57:55 am
content: One represantive call me today, he start the conversation trying to sell the blower, confusing to me because i never mention i wan't to buy new ones, looked like a comercial call not a support call. Had to stop the guy talk and ask "IDs? what for? My email request was about a firmware file, if sanyo can provide it to perform a repair and recover a damaged fan", only after he said "Yes, Sanyo replied, he have it here, i'll read it for you, hold on"..."they said Sanyo can't provide the file and you have to replace the fans (buy new ones)".So he promptly start asking for IDs and other stuff to place an order without ask if i want to, worse he never mention my request if i didn't ask for it, totally forgotten... Not against with sell, but starting the conversation by mention my email or provide a direct anwser first looks the correct way to deal with support and not otherwise, something like: "Hello, about your request .... Sanyo can't provide the firmware file and you have to replace the fans. If you want to, we can help you with the order process, do you like to start it?"I was expecting this outcome, but not the way i got contacted.My original email request:QuoteThe fun part is i know if i send it back to warranty before open they would send me a new one. I like to keep honest with my principles i never do it, also because i'm a seller and i know how hard can be. But this kind of approachs and/or customer care say me the otherwise

author: fzabkar
author_rank: Super Contributor
timestamp: July 05, 2019, 02:09:17 am
content: Your experience with Sanyo is the usual case in the repair business. I recall that I once needed a replacement MCU for a swimming pool controller (not Sanyo) but was told that I had to buy the whole PCB. The MCU had a single non-functional I/O pin, so I could have dumped its firmware had its security fuse not been set.

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 05, 2019, 02:17:03 am
content: Just replace the whole inverter board with a R/C ESC?

author: sn4k3
author_rank: Frequent Contributor
timestamp: July 05, 2019, 02:26:06 am
content: Quote from: fzabkar on July 05, 2019, 02:09:17 amYes i know, and was expecting that, they want profit. Give firmware to able to repair gives no profit to them. Like no over-voltage protection that can be easly applied gives no profit too. But is their product and they can keep things like that/private and ask to buy the whole device, theres no obligation (unfortunately because of e-waste). But as i said my problem was the wrong approach, where my ticket was tottaly forgotten in order to sell first...Quote from: NiHaoMike on July 05, 2019, 02:17:03 amThe PCB holds the insert and coil motor, if i remove theres no way to fix the axis and bearings. The solution would be with a compact circuit, open PCB continuty and implement it.Do you have any example?Was also possible to do a custom firmware, but no clue for it. Would require sacrifice a good fan first and learn about signals on MCU pins.I think i can put fan working at max speed by short MCU pins that goes to gates to 5V, will do the test