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ZTX313 vs 2N2369 pinoutJust for info: [IMG]http://benophetinternet.nl/hobby/vanmezelf/2N2369 vs ZTX313 pinout.jpg[/IMG]
... links, Mark! Cheers!
Replacing TR1/TR2 on an Issue 2 ... -
+2 issue oneI can't remember seeing this model board before, so here we go: [IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_153957.jpg[/IMG] [IMG]http…
Mine looks like this. The tr4 is off to the right and down from the rf mod. Tr1 and 2 are so close theyre touching. Mod datecode is 8422. -
TR1 and TR2 replacementCan anyone tell me the correct replacement part for these? This is for an Issue 4S btw
On all Issue 3 and 4A boards, I found that TR1 and TR2 face each other, means "round" side faces "round" side resp. the sides with the names on. -
Issue 4A repair attemptI think I need some help. I have a nice Issue 4A main board here, which does not give out any video signal. I checked some voltages (the ones that se…
... BC549, did the same for TR1
- Replaced C44 and C34 ... -
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…
... and coil swapped out, and TR1/TR2/TR4/TR5 swapped for ... I tried in place of TR1/TR2 made text display quite ... -
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…
... ZTX313 spares in place of TR1 and TR2. The BC547C's ... -
Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …
... 5mm standard green LED
TR1 .... NPN power transistor, IC max ... 81-0710
Heatsink for TR1
R1 ....... 68 ohms 1 ... -
Issue 4A repair attemptI think I need some help. I have a nice Issue 4A main board here, which does not give out any video signal. I checked some voltages (the ones that se…
... or both of the original TR1/TR2 were faulty. -
spectrum issue 6a oddityMorning everyone Bought a speccy (rubber key) from ebay in near mint condition - couldn't tune in on analogue particularly well so did the comp mod …
... on it, check and replace TR1 and TR2: these are the ... clean and monochrome signal. With TR1 and TR2 replaced, try the ... -
spectrum issue 6a oddityMorning everyone Bought a speccy (rubber key) from ebay in near mint condition - couldn't tune in on analogue particularly well so did the comp mod …
... .
Just checked the TR1 / TR2 voltages on the board ... border colour:
0 (TR1 0.587V) (TR2 2.313V ... )
1 (TR1 0.587V) (TR2 2.286V ... )
2 (TR1 0.587V) (TR2 2.260V ... )
3 (TR1 0.587V) (TR2 2.234V ... -
spectrum issue 6a oddityMorning everyone Bought a speccy (rubber key) from ebay in near mint condition - couldn't tune in on analogue particularly well so did the comp mod …
... 't fix your issue, replace TR1 and TR2 and remove C65 ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... give a better video picture (TR1, TR2).
Note *1 ... -
First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... transistors[/B][/U]
TR1 - ZTX313 ------------- Replacement #1
TR2 ... -
Issue 4A black paper, white borderJust had one of these through, nice yellow pcb! Everything but the ULA soldered in. On power up I get black paper, white border and some intermitten…
... the video circuitry and replaced TR1 and TR2, no change. Try ... -
Two more faulty onesCould I get your opinion on these two faults, please? Understanding these two cases would be very beneficial for my ZX education. Thanks! - A Spectr…
My first composite mod.Thought it was about time I gave the composite mod a go. I used a youtube video, the bloke in the video took 10 mins, I took about 2 hours :) but it…
... 't have ztx313's in TR1/TR2), then you can replace ... TR1/TR2 with BC549c's (taking ...ROM carts Psst and TransamNot mine; [URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=370960667761&ssPageName=STRK:MESE:IT"]Here[/URL] and [URL="http://cgi.ebay.co.uk…
... &_trksid=p2046732.m570.l1313.TR1.TRC0.A0.Xrom+spectrum& ... &_trksid=p2046732.m570.l1313.TR1.TRC0.A0.Xrom+spectrum& ...+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…
... , BC548 is a replacement for TR1 and 2 and BC547 for ... can also be used for TR1 and 2. A nice definitive ...The original Tomb RaiderI've never played Tomb Raider back in the day. For some reason it didn't appeal that much to me, but I had the same resistance to play Resident Evil …
... .
I first played TR1 in May/June 1997 on ...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…
... voltage inverter circuit comprising R51, TR1 and R52. R51 is 2K2 ... . At the point where R51, TR1, C65 and TR2 are connected ... R51 and the collector of TR1 should be lifted and connected ... not to load R51 and TR1 too much.
For ...Issue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …
Replace TR1 and TR2 with BC549C's, oriented in reverse to the silkscreen.
I did this last year, [URL="http://www.worldofspectrum.org/forums/showthread.php?t=45092"]here's[/URL] my thread on the subject.
BIssue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …
Got the transistors today, opened the speccy up in readiness only to discover that tr1 and tr2 have already been replaced with BC548B's, reversed to the silkscreen, should I just plough on anyways?Issue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …
... shorts on the connections for TR1 and TR2? That's the ...Issue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …
Looking again at TR1 it appears the solder pad ...Issue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …
Yep, just checked my 4S and can confirm that the base of TR1 connects to the right side of R48.
BIssue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …
... get it right!
Regarding TR1 again though, its only the ...
