CIRCUIT INTEGRE 1A374 SK202 G16BAN - Page 1
Forum section: electronics / repair

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 21, 2024, 12:11:10 pm
content: Bonjour la communauté, J'ai besoin de votre aide. J'ai une carte d'alimentation pour l'imprimante Canon G4470, et il y a un circuit intégré à 9 pattes sur cette carte qui a brûlé. Ce circuit intégré porte le numéro :1A374 SK202 G16BAN. Aidez-moi à réparer la carte d'alimentation pour pouvoir utiliser mon imprimante. Je ne trouve pas d'informations sur ce circuit intégré. J'ai besoin de votre aide, s'il vous plaît. Merci !

author: coromonadalix
author_rank: Super Contributor
timestamp: October 21, 2024, 02:45:50 pm
content: ceci est un forum anglais, svp traduire en anglaisthis is a english forum pls translate

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 21, 2024, 02:51:29 pm
content: Hello community, I need your help. I have a power board for the Canon G4470 printer, and there is a 9-legged IC on this board that burned out. This integrated circuit bears the number: 1A374 SK202 G16BAN. Please help me repair the power board so I can use my printer. I can't find any information on this integrated circuit. I need your help, please. THANKS !

author: tunk
author_rank: Super Contributor
timestamp: October 21, 2024, 03:01:34 pm
content: Photos may help, both chip and board.

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 21, 2024, 03:16:13 pm
content: there are photos in my post

author: fzabkar
author_rank: Super Contributor
timestamp: October 21, 2024, 09:39:17 pm
content: The "SK" in "SK202" could be Sanken. "2O2" could be Year/Month/Day.https://www.semicon.sanken-ele.co.jp/sk_content/str-a606xhd_ds_en.pdfY is the last digit of the year of manufacture (0 to 9)M is the month of the year (1 to 9, O, N, or D)D is a period of days:1: the first 10 days of the month (1st to 10th)2: the second 10 days of the month (11th to 20th)3: the last 10–11 days of the month (21st to 31st)https://s.alicdn.com/@sc04/kf/He4c9b73ec0ae421a86850cd838320ef0E.jpg(STR-A6079M)https://s.alicdn.com/@sc04/kf/H3233b1c4a67f4d948e5a138879cabcd6J.jpg(STR-A6159)https://http2.mlstatic.com/D_NQ_NP_720753-MLA44483969940_012021-O.webp(STR-A6252)https://img.alicdn.com/imgextra/i4/67272588/O1CN01QPyXKl1UzLcle4wdk_!!0-item_pic.jpg_q50s50.jpg(STR-3A151D)https://www.semicon.sanken-ele.co.jp/sk_content/str6a161hvd_ds_en.pdf(STR6A161HVD)https://sgemx.com/amfile/file/download/file/762/product/62471/(STR5A100D series)That said, I couldn't find any reference to STR-1A374.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 21, 2024, 10:24:02 pm
content: seems to be a custom engraved ...semble etre un numero graver dessus, nest pas une impression, numero maquiller ? falsifier ou custom

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 22, 2024, 06:22:34 am
content: Thanks for the reply, I would like to point out that the part has 9 legs (including 1 to 5 on one side and 6,8,9,10 on the other side), there is no leg 7.

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 22, 2024, 06:26:33 am
content: the number is not engraved, it is an impression on the part,

author: fzabkar
author_rank: Super Contributor
timestamp: October 22, 2024, 06:54:34 am
content: The part could be specially produced by Sanken for Canon.

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: October 22, 2024, 04:29:52 pm
content: Bonjour Hila ANGALIKIANA,As fzabkar pinpointed, Sanken seems to build several PWM controllers in DIP packages having an odd number of pinsTheSTR-A6000 Seriesalso features a DIP7 package.The 'SK202' marking also shows up on the STR-A6059 part (see attached picture), and I either couldn't find anything about that '1A374' marking. This IC seems to be an unobtainum.As the SMPS is plainly dead and there's not much else to loose, I would suggest to hack it by implanting another PWM controller, from Sanken or maybe aViper?Can you please upload a hi-res image of the solder side of the board, so that we can try to figure out why this IC has 9 pins...Tu lis l'anglais, ou je t'ajoute la traduc dans ce message ?

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 23, 2024, 06:50:53 am
content: Thanks for your intervention, I agree to hack the system, I am even up for a proposal to implement another card that I can use for the printer. I send you some pictures of the card as you asked me.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 23, 2024, 09:42:45 am
content: Quote from: timeandfrequency on October 22, 2024, 04:29:52 pmbut the number of pins does not fit, le nombre de pins nest pas bon

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: October 23, 2024, 03:30:22 pm
content: Hello Hila ANGALIKIANA,Yes I know : none of the IC's I mentionned has 9 pins. So it will require some sorcerer tricks to use one of those as a replacement for the dead PWM controller.Luckily, the PS housing gives some clues about the printer's power requirment :24 VDC 0.3 A32 VDC 0.45 A1) The easy wayThis Canon power supply matches the requirements.Might be a different form factor but OK, it should work.https://www.ebay.co.uk/itm/2539611430682) A bit steeper24 VDC power supply :https://www.reichelt.de/de/en/switching-power-supply-15-w-0-62-a-24-v-snt-rs-15-24-p137083.htmlFor 32 VDC, start with this one :https://www.reichelt.de/de/en/switching-power-supplies-36-w-36-v-1-a-mw-lrs-35-36-p202957.htmlfollowed by a LM317 regulator + heatsinkFor 32 VDC output R1 = 470 OhmsR2 = 11562 Ohms (10k fixed resistor + 2k2 adjustable resistor)https://www.omnicalculator.com/other/lm317Use a vanilla multimeter to adjust the output voltage to 32 VDC.3) The hard wayA closer look to the solder side of the PCB gives some information about that weird PWM IC (see attached picture)The +320 VDC and 0V rails are easy to find.For the PWM controller :Pin 3 GNDPins 8, 9, 10 High voltage switch drain connexionPin 1 must be the source connexion of the high voltage switch, because R104 (probably a very low value) seems to act as a current shunt towards the 0VPin 6 is some kind of startup power supply because it's rectified from the mains with 2 x 3k3 in seriesPin 4 is probably the feedback signal coming from the optocoupler (it's not easy to follow the tracks under the SMD parts). There are also very small (0402 ?) SMD parts going from that track towards 0V.Pin 2 is the IC's power supply, coming from the AUXilary primary winding through 2 x 5,1 Ohms, and an SMD diode. There's also an unknown SOT-23 SMD part in the path (I marked it TR?).Of course, selecting a 'compatible' PWM IC is far from easy and the magic smoke might show up.One additionnal difficulty is that we don't know the switching frequency of the original part. The ferrite transformer has of course been manufactured with a precise primary inductance, that matches with the PWM IC switching frequency.And of course, all of the electrolytic capacitors must also be replaced with new ones.Update #1 & #2 & #3 : typos

author: Hila ANGALIKIANA
author_rank: Newbie
timestamp: October 23, 2024, 04:40:36 pm
content: Hello engineer, the first option is the simplest as you said, I looked at the other two options which are more complicated for my level, I take the first option, I just want to say that you are geniuses, and I am very happy and proud of each of you for the time you have dedicated to me, your reflection and analysis have helped me a lot, you are truly geniuses, thank you very much, God bless you