After four straight wins, United dropped their first points in front of their own fans when they drew 1-1 with Birmingham City at the weekend.Īt kick off the hosts sat top of the league and they started brightly. Since an opening-day defeat to Watford, the Blades had picked up 24 points from a possible 30, going undefeated in ten.Īt home, Paul Heckingbottom’s side have been a formidable challenge. While the R’s went into this in confident mood after just one defeat from their last seven fixtures, they knew they were facing the Championship pacesetters in Sheffield United. Sam Field joined Dozzell and Amos in the centre of the park with the familiar duo of Chris Willock and Chair playing off Tyler Roberts in attack. Seny Dieng continued between the posts while Ethan Laird, Leon Balogun, Dunne and Kenneth Paal lined up as a back four, from right to left. In the absence of Johansen from the starting XI, Chair was handed the captain’s armband. With QPR in the midst of three games in six days, Mick Beale made three changes for the trip to South Yorkshire with Jimmy Dunne, Luke Amos and Andre Dozzell coming in for Jake Clarke-Salter, Stefan Johansen and Tim Iroegbunam, who were on the bench. The only sour note of an otherwise excellent away-day was the sight of Willock being forced off the pitch with a hamstring injury shortly after he scored. All of you are life savers.The R’s forward struck on 51 minutes with a low effort from inside the box and it took a hard-working and focused performance from everyone on the pitch to blunt the Blades on their own turf for the first time this season. Could someone post the power supply schematic so i can have a look. Boys and girls, this is why we should write down our troubleshooting records when it starts getting involved.LOL. I think i've done this but don't remember. I'll test voltage at r15 over a period of 15 minutes and see what happens. I may be barking up the wrong tree and the problem may be something breaking down in the power supply to the switching circuit, like maybe a zener used as a regulator, and not the switching circuit at all. When the signal at pin 6 drops to certain low level the distortion channel is activated. If i understand this right, U6 needs a hi signal to pin 6 to keep the amp in the clean channel.
GK BACKLINE 100 FULL
It starts with a very dim,flickering glow and the longer the amp is on the brighter it gets until it is full bright after about 20 minutes. I powered it up this morning and the thing i didn't mention before was the Distortion LED doesn't start coming on until the amp has been on for 9 minutes or so.
GK BACKLINE 100 CRACKED
I did more test on it and i didn't find any cracked solder joints or damaged tracings, torn solder pads. I had to put the GK to the side so i could take care of other amps. the BL 600 is one of the models using it. Set it so the LED is ON, then wiggle the LED.
GK BACKLINE 100 SERIES
Hell, C45 could be trying to short, we could remove it and see if it makesd a difference.īut since the LED is a series element when the IC is activated, what if the LED itself is the problem? It could be intermittent, or its solder cracked. SP that leaves us with possible switch and/or jack somehow intermittantly grounding that point ORRR when it is supposed to be grounding it, it sometimes loses continuity to ground. That then turns on the LED, and also grounds off the control pin of the IC. The footswitch or panel switch grounds the bottom end of the LED. The voltage to the control pin of the gate IC comes THROUGH the LED to get there. I am looking at the schematic, and I see U6 as the switching element, and I see the LED. If the DG chip is what switches signal paths, then what CONTROLS that IC? And what CONTROLS the LEDs? When you get two symtpoms that occur together, like channel switchcing on its own AND LEDs blinking at the same time, don t IGNORE one of them. I haven't checked yet but isn't the !N 4148 a zener? Anyway, the led is still on constantly and could that LED be leakyThanks. D4 was a 1n4148 i replaced it with a 1n914. Before i got the schematics i was shooting in the dark and i replaced U1 TL 072 and also diode D4.I touched up some of the solder joints which are in the switching circuit. There wasn't any dc voltage leaking between the pins that i could see but that doesn't mean the switch is good. Which pin activates the switch? Looking at the schematic i've checked everything in the positive voltage path and everything seems fine. Pins 1,2 6 and 8 seem to be signal carriers. I got the pin out for the DG419 from Alldatasheet and did some voltage checks.Pin 4 is positive 14 volts. I actually have a O612AA chip in that position so i'm guessing either that's an in-house number or a substitution. The schematic shows a DG419DJ analog switch in the U6 position. I realized after the fact there are 2 schematics.
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