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ZX Spectrum+ 4B - STOP not workingHi I have been trying to revive an old Spectrum+ I bought off eBay and to that end I bought a new membrane for it as the keyboard was duff. Now I …
... #conv"]this section of the service manual[/url] ;-)
[b][i ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... 32k byte EPROM and two manual switches: one to select between ... version (as recommended in the service manual).
[*]Have test links that ... -
ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …
... 32k byte EPROM and two manual switches: one to select between ... version (as recommended in the service manual).
[*]Have test links 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…
... , TR5 and associated components). The service manual details a Sinclair recommended upgrade ... -
ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …
... circuitry as recommended in the service manual.
[b][i]Mark ... -
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…
... and upgrades are in the service manual. Note that with some of ... -
50 Hz / 60 Hz switch in Timex Computer 2068I'm not sure if this is common knowledge, I've certainly never read about it online, though it may be documented in Portuguese or Polish. There is a…
... the TC2048 schematic diagram and Service Manual below.
[img]http ... -
Atari (kempston) joystick adapter to Sinclair pinoutWhile going through one of my boxes filled with hardware bits I found the joystick adapter I used with the +2: [img]https://i.imgur.com/tlBHTco.jp…
... layout in the +2 (grey) service manual, pins are connected as listed ... schematic. Same for the +3 service manual.
[b][i]Mark ... -
Help with a TIMEX TC2048 and memory problemBought a 2nd hand Timex TC2048 but unfortunately I detected a problem with the machine which is preventing it from working properly. I believe it …
... ]
(Yes, I know Service Manual recommends 4416-15NL but those ... -
Quick questionHello, can someone tell me what the screen looks like when you power a 48k spectrum that has no ROM chip installed ? Thank you. François
... board. For details, see the service manual.
/RD from the ... -
Membrane issuesHello. From the title you might be assuming that my troubles come from a old membrane, but no. Quite the opposite. I ordered a Membrane from Retro…
... 's in also in the service manual.
Work through each ... -
ZX Spectrum+ new membrane not working properlyHi! I recently got myself a ZX Spectrum+ . It had the classic broken membrane problem (most keys didn't work and those that did were wrong). So I or…
... it's mentioned in the service manual.
[b][i]Mark ... -
Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…
... , both 74LS157, but read the service manual).
[b][i]Mark ... -
Testing an Interface 1As title, is there an easy way on how can I test to see if its functional or not please ? :) Please bear in mind I do not have *any* microdrives n…
... the test procedure in the Service Manual for IF1, IF2 and Microdrive ... test. You can find the Service Manual in the documentation section of ... -
Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …
... see the page 44 in service manual, where this signal is specified ... -
What % of WOSSERS use "old school" tape loading when playing their Speccy games.My guess is .000000001% ( but I might be slightly out on this! ) Do people still enjoy doing it "the old way"?
... , have found and downloaded the service and user manuals.[/quote]
service manual for mine but no doubt ... -
What % of WOSSERS use "old school" tape loading when playing their Speccy games.My guess is .000000001% ( but I might be slightly out on this! ) Do people still enjoy doing it "the old way"?
... or you could use the service manual to find out, I woudl ... -
48K ZX Spectrum 48K Recap (Capacitors) Or Not?I have seen arguments "for an against" on this subject by some "high calibre" experts . So if the experts can differ on this question then my questi…
... already really good at electronic service work, fine, feel free to ... as you like. But professional service engineers only renew what has ... to be changed (in the service manual), is known to cause stock ... -
Video: Repairing a ZX Spectrum +3 and 3" Disk DriveThis particular Spectrum +3 had multiple things wrong with it. I attempt to fix them all but only manage varying levels of success.
... ! It wasn't in the service manual, was it? I take it ... -
Video: Repairing a ZX Spectrum +3 and 3" Disk DriveThis particular Spectrum +3 had multiple things wrong with it. I attempt to fix them all but only manage varying levels of success.
No, my +2B/+3B service manual (and amendment) don’t have it either. It’s clearly reverse-engineered by someone, but in any case, it’s a good starting point. -
A couple of random questions......because, why not? (1) USR0 mode on the +3/+2A/B I know of its existence, I know how it's used, and I have some games that require it to work o…
... to USR 0 in the +2A/+3 manual, at least, is because ... -
zx spectrum +2A modulatorhi specy world , i recently sold a specy +2A with a modulator that looked different from the normal astec jobs .. it was VM-516/E36 b/wave inc taiwa…
[quote="1024MAK;967212"]It gets called this, because this is what is in the +2B case.[/quote]
More that it's the circuit described in the +2B service manual. -
5C series NTSC ULA 5C114E 8248Not sure if this has been mentioned before; I haven't seen anything about it online. Chris Smith's book discusses 6C011E as the NTSC ULA sold in Spec…
... [/url] as well as the service manual}.
Like on this U ... -
Anybody got a parts list for an Issue 3b please?I've got a schematic, but does anyone have a parts list with the values just for the resistors and capacitors? Just would save me sometime going thro…
... /uploads/2017/08/ZX-Spectrum-Service-Manual.pdf
not sure ... -
Anybody got a parts list for an Issue 3b please?I've got a schematic, but does anyone have a parts list with the values just for the resistors and capacitors? Just would save me sometime going thro…
... /uploads/2017/08/ZX-Spectrum-Service-Manual.pdf
not sure ... -
16pf Capcitors for C72/C73 issue 3b. Can I use 18pf?Looking at the service manual it states to use a 16pf ceramic disc capacitor in positions C72 and C73 on issue 3b boards. Is this very critical in bo…
... 'm very much mistaken. The service manual does not state to use ... -
Spectrum +3 not working [HELP]Hi, When i turn on my zx spectrum +3, im presented with a black screen with a solid green border all around it. Anyone here knows whats the meani…
... a quick look at the service manual which shows the error colour ... -
16pf Capcitors for C72/C73 issue 3b. Can I use 18pf?Looking at the service manual it states to use a 16pf ceramic disc capacitor in positions C72 and C73 on issue 3b boards. Is this very critical in bo…
... rating as listed in the service manual, except for C72/C73 where ... for 2 resistors where the manual states 2% tolerance, and went ... -
Interface 1 ULAIs there a technical description of the functionality of the Interface 1 ULA, similar to the "The ZX Spectrum ULA" book? Specifically, what is the…
Except the service manual says both outputs... In which case, no idea! -
FS : Spectrum +2A (fully working) inc manual + lightgunAs title, fully working nice condition +2A. Ive tested all the keys, loaded and played a few games of Motos and all was fine. Includes nice conditi…
... title, fully working nice condition +2A. Ive tested all the keys ... was fine. Includes nice condition manual
The PSU is ... want any tapes and the manual, plus I seem to be ...
