jea48
Responses from jea48
| component grounding Forty plus years ago I don’t recall any consumer electronic equipment that used an EGC, (Equipment Grounding Conductor). Late 1970s and earlier consumer electronics came with a two wire non polarized plug. (Though the home you were living in may h... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock GFCI is a suitable replacement for two prong outlets without a grounded wire. This is absolutely true per the NEC, but the assumption made is that the incoming AC would come into contact with the chassis and trip in time. I’m not sure if t... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock jbhiller OP 1,115 posts 01-23-2022 3:20pm Hi @jea48 , can you explain the takeaway for us from this observation? Are you saying the B- is properly handled so we do not have to worry about other means of chassis grounding? N... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock With Bob getting older, it was time for him to focus on what he loved-- his family, his hobby, and designing audio gear. So I recruited EJ Sarmento of Wyred 4 Sound and we bought the rights to the brand keeping Bob as our chief designer-- effecti... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @jbhiller CORRECTION: jea48 3,741 posts 01-19-2022 5:13pm @jbhiller , What a mess. Sell it and never look back! Good news don’t worry about the DC power supply B+ inside the amp. On the back of the amp is a fuse... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @gktaudio I agree the schematic shows signal and circuit grounds go to chassis, and that the sequence shows fuse, switch, and transformer. It would have been nice to show the jack connection first, rather than just the source AC symbol. Also, R... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @gktaudio Here is the schematic wiring diagram for the amplifier section. Note the RCA jack ground is grounded directly to the chassis. EDIT: Go to page #13. https://www.manualslib.com/manual/2038602/Bob-Carver-Crimson-275-Stereo.html | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @10229 The AC power wiring inside the equipment is double insulated. (NO safety EGC , Equipment Grounding Conductor, is needed) Look on the back of the units. It should say Class ll wiring and or may display a square inside of a square. It cos... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @gktaudio As for changing the incorrect AC Power wiring it would be an easy fix for someone with a soldering iron and basic soldering skills. Note, the schematic wiring diagram for the amp. Carver shows the correct wiring sequence. Fuse >>... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @jbhiller What year did you buy the Carver Crimson 275 amplifier? As for ’ your ’ Carver Crimson 275 amplifier did you remove the bottom cover and actually look inside the amp? The photo you posted was not of your amp. It is possible your amp ... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @jbhiller Why is the schematic wiring diagram for the AC mains connection to the switch and fuse connection to the power transformer in the manual different than the unit shown in the photos of the amp in your thread? Also note the schematic wir... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock mrdecibel 2,549 posts 01-20-2022 4:37pm So, the 3rd prong on the ac connector is not grounded ( Crimson 275 ) ? Can someone, with the technical knowledge, explain how this is different to the hot wired 2 prong wire / plug we used... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock The power wiring is correct. From the switch there are two wires, each of which goes to one of the dual primary 120V windings of the mains xfmr. Coming out of the transformer are the two neutrals that tie into the fuse, which then goes out of the... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @atmasphere I would be willing to bet you do not fuse the AC mains neutral conductor in your equipment. The correct way is Hot from the IEC inlet connector to >> fuse to >> switch... Fuse as soon as possible inside the equipment. T... | |
| Owners of Carver Crimson 275 -Caution/Warning--Potential Increased Risk of Electric Shock @jbhiller , What a mess. Sell it and never look back! Good news don’t worry about the DC power supply B+ inside the amp. On the back of the amp is a fuse for the B+. Bad news, from what I see the AC power wiring violates electrical safety stand... |