Subject: Need help identifying burnt SMPS IC (DIP-8, no visible marking) - Russell Hobbs coffee maker power board
Hi all,
I'm trying to repair a coffee maker whose power supply board has died - the machine shows no signs of life at all (no display, no buttons working).
Appliance: Russell Hobbs coffee maker, model 25.610.58 (also marked 25424CV on the rating label), 220-240 V, 50/60 Hz, 1000 W. Made in China, distributed by Russell Hobbs Deutschland GmbH.
Board marking: 367801-B V1.6, dated 2019-09-12, chip marking "LX082" visible near the transformer area.
The suspect part: A DIP-8 IC labeled U1 on the silkscreen (near reference "SCI3"). The top marking is completely burnt/illegible - I can only make out a partial "12" in the middle, nothing else readable even under magnification. This is clearly a primary-side SMPS controller: it sits right next to a small transformer, a yellow relay, and what looks like an opto-coupler/feedback path toward the secondary side.
What I know about the layout:
Small transformer (yellow tape) right next to the IC
Nearby electrolytic capacitor (400 V rated, visible on board)
A diode marked SD5 close by
Fuse-like component (yellow, marked "DRAIN") near the relay
The board also carries a ribbon cable connector for the front control panel
Since I can't read the top marking, I'm hoping someone can help identify the IC by its pinout/footprint and the surrounding circuit topology (likely candidates: VIPer12A/22A, TNY series, SD8002, LNK304, FSDM0265, or similar offline PWM switcher in DIP-8/7).
I can post additional close-up photos of the board (both sides) if that helps narrow it down. Any input - even "it's probably X because of Y trace pattern" - would be hugely appreciated.
Thanks in advance!
Hi all,
I'm trying to repair a coffee maker whose power supply board has died - the machine shows no signs of life at all (no display, no buttons working).
Appliance: Russell Hobbs coffee maker, model 25.610.58 (also marked 25424CV on the rating label), 220-240 V, 50/60 Hz, 1000 W. Made in China, distributed by Russell Hobbs Deutschland GmbH.
Board marking: 367801-B V1.6, dated 2019-09-12, chip marking "LX082" visible near the transformer area.
The suspect part: A DIP-8 IC labeled U1 on the silkscreen (near reference "SCI3"). The top marking is completely burnt/illegible - I can only make out a partial "12" in the middle, nothing else readable even under magnification. This is clearly a primary-side SMPS controller: it sits right next to a small transformer, a yellow relay, and what looks like an opto-coupler/feedback path toward the secondary side.
What I know about the layout:
Small transformer (yellow tape) right next to the IC
Nearby electrolytic capacitor (400 V rated, visible on board)
A diode marked SD5 close by
Fuse-like component (yellow, marked "DRAIN") near the relay
The board also carries a ribbon cable connector for the front control panel
Since I can't read the top marking, I'm hoping someone can help identify the IC by its pinout/footprint and the surrounding circuit topology (likely candidates: VIPer12A/22A, TNY series, SD8002, LNK304, FSDM0265, or similar offline PWM switcher in DIP-8/7).
I can post additional close-up photos of the board (both sides) if that helps narrow it down. Any input - even "it's probably X because of Y trace pattern" - would be hugely appreciated.
Thanks in advance!
