-
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
... in the 48K models :) (TR8/TR9 perform the equivalent voltage conversion ... -
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
Ok, what voltage reading do you get from the positive side of C41?
Maybe TR8/TR9 (ZTX213/ZTX650) need replacing after all!
B -
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
Cool, that's what I was hoping :)
Change TR8 and TR9 and see what happens!
B -
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
... ).
Most likely cause, TR9 (a ZTX650)...
[B ... -
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
D20 1.45v
Tested TR9 itself and looking at it top to bottom 10.6v, 10.6v, -0.02v -
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
[QUOTE=Macc;754555]Tested TR9 itself and looking at it top to bottom 10.6v, 10.6v, -0.02v[/QUOTE]TR9 is [I]dead!
[/I]Replace it with a ZTX651 or a ZTX653 :p
[I][B]Mark[/B][/I] -
+2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…
Just got back from replacing TR9 and TR8 with ZTX651's, frustratingly, no difference at all, bugger!! -
PSU Overvoltage?Going through a pile of 48k PSU's today, rewiring and fitting new plugs, testing each one as I go I came across one that outputs 14.85v, usually im g…
... can have slightly different output voltages with the same test load ... -
Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…
... [/URL] first, then check 4116 voltages (48K only) - remedy any faults ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... and check all 3 supply voltages at the lower RAM. If ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... . Great Video Zorn.
Voltages at Regulator and all lower ... -
Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
[QUOTE=rune;759961]Voltages at Regulator and all lower ... -
My TV is dying....oh no's!So I'm thoroughly enjoying my return to Spectrum life at the moment. But something is becoming clear to me. Or to be more exact, clearly fuzzy to me.…
... types. I wonder if the voltages of the +3 output signals ... -
The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…
... kind of picture. I measured voltages from the lower memory and ... -
Beta Disk MicroP 3.5 Disk Drive DIN Connectors signalsHello, I own a Beta Disk with an 3,5" Disk Drive from MP (MicroP) which has two DIN Connectors. One is a DIN Connector with 5 Pins, the other a DI…
... need for knowing the correct voltages which should be input from ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... states that Br2 handles input voltages ranging from +9 to +12v ... -
ZX48 svideo modI have modded a ZX48 to have svideo output. The end of C65 that goes to TR2 (its an Issue 2 zx 48 ) has been lifted to get Chroma. Luma is taken fro…
... find out the pk-pk voltages or if it is putting ... -
ZX48 svideo modI have modded a ZX48 to have svideo output. The end of C65 that goes to TR2 (its an Issue 2 zx 48 ) has been lifted to get Chroma. Luma is taken fro…
... find out the pk-pk voltages or if it is putting ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... gets toasty but not hot. Voltages within spec. No shorts to ... -
is sega arcade stick compatible with 128+ toastrack?i bought 1 to use with my c64 but then learned i ran the risk of damaging my breadbin,so,i wondered if it was safely possible to use it on my +128 vi…
48k black paper white borderI recently sold a speccy to a guy, unfortunately the power supply didnt survive the trip, so on replacing for him it seems neither did the speccy! H…
... interested to see the 4116 voltages with the faulty supply attached ...48k no beeper sound (again!)Got three 48k+ here, all of which have the same exact problem, no sound out the beeper, same problem as detailed [URL="http://www.worldofspectrum.org…
... .
All the following voltages are referenced to 0V/ground ... , so may well show lower voltages.
[I][B]Mark ...48k no beeper sound (again!)Got three 48k+ here, all of which have the same exact problem, no sound out the beeper, same problem as detailed [URL="http://www.worldofspectrum.org…
Im getting exact same results, not sure if its is D9 though, the voltages are the same as a working one but then again, im not 100% sure im testing it properly48k black paper white borderI recently sold a speccy to a guy, unfortunately the power supply didnt survive the trip, so on replacing for him it seems neither did the speccy! H…
... knock on effects to RAM voltages etc.
I've ...Video on single transistor composite video modification for 48K SpectrumsI made a video on the single transistor composite video mod, using an Issue two Spectrum although it applies to all issues. Much better than the sing…
... video input was connected the voltages immediately reduced. That circuit was ...Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... "mean" value.
The voltages between PIN 2-3 and ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... and not all values or voltages are available. The diameter is ...TR4 or TR5?My issue two gives horizontal bars on bootup. Flicking reset takes it to copyright screen though. I measured voltages and got 4,9V, 11,99V and -4,3V.…
The voltages you measured suggest TR4 & ...Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... /> Tomorrow I'll check the voltages again and see if anything ...
