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Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
... diode and power up. If TR4 blows, it's not RAM ... -
Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
... diode and power up. If TR4 blows, it's not RAM ... faint vertival lines) and the tr4 was blown. After that every ... time i replaced tr4 and tr5, the tr4 blowed again emmediately ... -
Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
Ah well, changed the Coil and TR4 from a known working Speccy + that I have lying about and still no joy. Going to find my multimeter and look into it a bit more as I'm not going to give up on this. :) -
Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
... .html[/url], also suggests the TR4 and it also mention's ... [/url], also suggest's the TR4 is at fault for the ... />
So I reckon my TR4 is shafted but I just ... -
Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
... may have a problem with TR4, but it'll be an ... />
BTW - if you find TR4 is at fault, you'd ... -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... a high current, given that TR4 is the transistor that charges ... -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... a row (all night), the tr4 is warm enough though... -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... not sure.
The tr4 transistor is a BC487 now ... -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... a row (all night), the tr4 is warm enough though...[/QUOTE ... -
problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... wrong. I would check/replace TR4, TR5 and TR3.
-Check ... -
problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... />
I will replace tr3, tr4, and tr5 if anyone tells ... can use.
tr3 =
tr4 =
tr5 =
Greets ... -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
yes, you can use ZTX214 but why bother when I have sent you a ZTX750 :)
You only need a general purpose transistor (pnp) for tr5. Tr4 is a different story - but you know then :D -
problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... equivalent, I use those)
tr4 = ZTX650, ZXT651 (ebay)
tr5 ... -
problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... />
I will replace tr3, tr4, and tr5 if anyone tells ... can use.
tr3 =
tr4 =
tr5 =
Greets ... -
Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…
DEATH let me remind you that I was having overheating problems when using the BC487 instead of ZTX650 as a tr4 (in 3 boards). When replaced with the ZTX650 no problems any more. -
Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... us be twas the ztx650 tr4 -5volts driver twas short. Us ... -
Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... us be twas the ztx650 tr4 -5volts driver twas short. Us ... -
PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... Speccies here with the original TR4 etc - working perfectly after 25 ... and cheaper to just replace TR4. If you have to re ... -
Speccy 128 QuestionMainly for the experienced speccy resurecters around these parts. Have you ever had a Speccy 128 with a borked TEA2000 video chip? The reason I ask…
... problem is that the transistors TR4 (for SCART output) and TR2 ... -
tr1-2-3-4-5hi guys, can someone tell me, what is the exact function of each of the five transistors i have on my zx+3 i mean the black transistors TR1 TR2 TR3 T…
... transistors TR1
TR2 TR3 TR4 TR5,
thanx,[/QUOTE]
TR4 -> Audio IN Amplifier
tr1-2-3-4-5hi guys, can someone tell me, what is the exact function of each of the five transistors i have on my zx+3 i mean the black transistors TR1 TR2 TR3 T…
[QUOTE=Gods;227898]TR4 -> Audio IN Amplifier
... looks dead wrong here....
TR4 and TR5 are part of ...tr1-2-3-4-5hi guys, can someone tell me, what is the exact function of each of the five transistors i have on my zx+3 i mean the black transistors TR1 TR2 TR3 T…
... looks dead wrong here....
TR4 and TR5 are part of ...Diag Board and Simple 8bit IDE IFHello, finally I have made it. After finishing Winston's Diag Board a few days ago I started yesterday building the 8 bit IDE Interface from Peras s…
... I got rid of this TR4/TR5/coil technique. But also ...Spectrum 48K video fixI have done this mod to my 48k speccy and now when i plug the spectrum into the tvs composite port i just get a black and white picture no colour. It…
... under Documentation), I found that TR4 was damaged. You could at ...sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
... to the CPU clock input. TR4 and TR5 are used in ...Zx Spectrum 48k,128k e +2Hi, I'm looking for Speccy 48k issue 5, a Spectrum 128K issue <>6U and ZX Spectrum +2 grey issue 2 and 4. Matteo
[QUOTE=powerhp73;256553]Hi, I'm looking for Speccy 48k issue 5, a Spectrum 128K issue 6U and ZX Spectrum +2 grey issue 2 and 4.
Matteo[/QUOTE]
I dont think there is an issue 5 48k speccy, it went straignt to issue 6 after 4B.Zx Spectrum 48k,128k e +2Hi, I'm looking for Speccy 48k issue 5, a Spectrum 128K issue <>6U and ZX Spectrum +2 grey issue 2 and 4. Matteo
Is there something special about 128K issue 6U too?Zx Spectrum 48k,128k e +2Hi, I'm looking for Speccy 48k issue 5, a Spectrum 128K issue <>6U and ZX Spectrum +2 grey issue 2 and 4. Matteo
No I think 6U is very common. I'm looking for any version different the issue 6U.Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... today I managed to break TR4 of the speccy power circuit ...48K specs boots, but THEN blinking blocks!Of all ZX problems I have seen, the 'blinking blocks' is the most common... Today I picked up a 48K, it boots and THEN it locks filling the screen wi…
... your life on it that TR4 is hosed (ZTX 650) its ... is TR5 (ZTX313) which kills TR4 as it dies. Try these ...
