The unit works good.Fuse went bad. Replaced with 15A 250V 5x20mm T15AL250V Slow-Blow Fuse Glass Tube Fuse. The Fuse in smaller compartment where input power inserted from the main power socket. You don't need to open anything inside coin unit to replace the fuse.The setup instruction is challenging. Added simplified instruction.Setup steps Coin Operated Timer ControlI am able to setup to run this unit for 59min 1 sec with 4 coins of 25 cents USTurn on the powerTimer Board:---------Press S4Click S1 to setup coins- 4 in my casePress S4Left counter blinks, Press S1 to setup 59 for minPress S4, Press S1 to setup 1 secPress S4, left 00Press S4 Left 00Press S4 and displays 00:00Setup COIN Acceptor unit -----Press Add and Minus simultaneously for few secondsA displayedPress Set for few sec and releaseE displayedI want to setup only 1 type of coin (25 cents) so use Add/Minus to set 1. You could set up to6 types of coins.Press Set button for few sec and releaseH1 displayedUse Add/Mins button to setup count for Sampler coin for unit to learn. I setup 10.Press Set button for few sec and releaseP1 displayed. This is pulse count with each coin.I set as 1 for each pulse for a coin using Add/MinusPress Set button for few sec and releaseF1 displayed. This is an accuracy countI set as 8 which is default using Add/MinusPress Set button for few sec and releaseA displayedPress Set for few sec and releaseE displayedTurn off the powerCoin unit - Setup Type of COIN -------------Turn on the powerPress Set for few sec and releaseA1 displayedI setup H1 as 10 so I inserted 10 coins of 25 cents for machine to learn type of coin toacceptIt was displaying count from 1 to 10 and then turn to A1Turn off the UnitNow unit is all set to work for 59:01 min:sec with inserting 4 coins of 25 Cents