-
Can't tune into spectrumHi - I recently discovered an old ZX Spectrum in amongst a load of junk (it's the 48K version). Not sure whether it works yet because when I try to t…
... pins 1 and 9 on IC6 as suggested by a service ... -
Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
+2B ram chips?Hi all, I have got 2 Plus2B`s and 1 Plus2 gray case. Ok the one Plus2B don`t work, so I tried to see if I could pin down the problem. I changed the …
... .
The one ram chip IC6 had a pin bent and ... then removed 2 ram chips IC6 and IC4 replace dwith 2 ... , and the one ram chip IC6 was not seated in with ...issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…
... voltages got back
on ic6 I have good 5, -5 ...IC5 and IC6 chips +2bAre these easy or hard to get hold of if not, are there any substitutes for them.
Are these easy or hard to get hold of if not, are there any substitutes for them.Spectrum +2b and other stuffFor sale Spectrum +2b needs ic5 and ic6 chips (cardinal error pluged joypad in while switched on tut tut) worked perrfectley till the. Have got psu …
... Spectrum +2b needs ic5 and ic6 chips (cardinal error pluged joypad ...Modding / repairing a +3I've got a +3 and I'm repairing and enhacing the computer. The enhacements I've done so far: - A slightly buggy video composite output. - Repairing …
... between D7 of IC4 and IC6) or it's better leave ...Newbie question about my unwell Spectrum...Hi - I have had a couple of dud 48K Issue 3 Spectrums in the loft for 20 years or more. One would initialise sometimes but could not be guaranteed t…
... be a RAM fault because IC6 and IC11 run significantly hotter ...128K+2A/+3 RAM layoutDoes anybody know how physical RAM is mapped to ZX 128k+2a/+3 address space ? There are four 64Kx4 chips IC4-IC7. IC4-IC5 seems to be contended (vide…
... -IC5 and 0-3 to IC6-IC7, but not sure which ...BeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
... /> +5v on pin 9 of IC6
+12v on pin 8 ... of IC6
-5v on pin 1 ... of IC6
The first two ...ZX Spectrum problemsHello Everybody, I am new here, and I need some help in my ZX repairs : - I have a ZX Spectrum 48k board (issue 2) which power up but remains stuck o…
... did some basic tests on IC6 all are ok, and voltage ...Issue 4A issuesHi all, I've been trying to get the Issue 4A board that came DOA with the case I purchased for my Frankenspectrum to work. I've recapped and socket…
... the lower RAM IC sockets IC6-IC13 are getting correct voltages ...Video failureHi i cant find the failure of my spectrum 48k issue 4a, i thought it was ic6 or ic13 but the memory seem to have the right values. When i turn it on…
Hi
i cant find the failure of my spectrum 48k issue 4a, i thought it was ic6 or ic13 but the memory seem to have the right values. When i turn it on it shows:
[IMG]http://t.imgbox.com/adxOE1D0.jpg[/IMG]
any ideas, what could be?Calling people with Diagboards.....and who have toastracks or grey +2's with all socketed memory :) I'm finishing off modifications to the Diagboard firmware to expand its testing c…
... [/IMG]
.. and when IC6 and IC8 (lower RAM) are ...Issue 1 16K RAM bankFolks, I recently had a chance to fix a couple of Issue 1 boards, and learned the hard way that the chips in the 16K RAM bank have a different place…
... from left to right (IC13...IC6)
with Issue 1 ... (IC13-IC12-IC11-IC10-IC9-IC6-IC8-IC7).
This ...48k not startingHi team, I have 2 48k's, one works (Issue 4s), one doesn't (Issue 4a). The non-working one appears to start, but not finish the RAM test. The pape…
... measurements on the pins for IC6-13 appear close, but not ...No video from my Spectrum +3 hot chips!I still can't get to the bottom of my +3 giving no video. It powers up and both the power and disk drive lights are on solid. The disk drive won't ma…
... '. Looking inside I discovered the IC6 and IC3 chips to be ...Shimmering displayHi all, I've got a 48K issue 4S and it appears to be working apart from it's displaying weird vertical shimmering patterns. It passes a RAM test t…
... with no change and also IC6,7,11,12 and 13 ...ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... 0v to pin 1 of IC6 (the Repair Guide report that ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... the voltages on the 4114 IC6.
- pin 1 - should be ...Lower & upper ram IC's for an issue 3 please.Would any of you great folks have 1 spare lower ram, and 1 spare upper ram IC's you would be willing to sell. I'm fixing up a poorly Spectrum that is…
... diagnostics has highlighted that both IC6, and IC17 have failed so ... STC 4116 2N(or equivalent) (IC6)
1 x TMS 4532 ...Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…
... ]
I moved onto IC6, but that was more difficult ... ]
After installing the IC6 socket and new 4116 and ...Re-created Multiface 128Just bought the bare board from the Bay and am wondering if anybody else on here has built one? Well made PCB, doc files online including a BOM an…
... BOM is missing things like IC6 and 9, both being 74LS32 ...is my ZX Spectrum + finished :(When i turn it on the screen i get the usual gray border all around but in the screen area i get yellow and some orange lines with a black background…
... I'd start looking. Also IC6 would be my second choice ...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 …
Right then. I've replaced some hot ic6 to ic13 chips and it now boots up to the "1982 Sinclair Research" screen. 8) It ain't done that for years. Now though, there's no response from the keyboard but I'll track that and sort it.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 …
... . I've replaced some hot ic6 to ic13 chips and it ...
