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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Bullet VM30 combo, GDR from 1990
But looks more 1970s .
Anyone familiar with strange transistor. capacitor and these IC markings such as "X2 080" ,"X8 761" ,"TL 761" (not opto) ,"X8 082" ,"X6 081" ,"X6 082" , V4007D (not CMOS 4000) -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#2
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Bullet VM30 combo, GDR from 1990
On Sun, 13 Jul 2008 22:01:59 +0100, "N_Cook" wrote: Anyone familiar with strange transistor. capacitor and these IC markings such as "X2 080" ,"X8 761" ,"TL 761" (not opto) ,"X8 082" ,"X6 081" ,"X6 082" , V4007D (not CMOS 4000) Found in an old VEB Kombinat Mikroelektronik databook: B080D = TL080 B081D = TL081 B082D = TL082 B761D = TAA761 V4007D = CD4007UBE Best regards Piotr |
#3
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Bullet VM30 combo, GDR from 1990
Piotr Piatek wrote in message
... On Sun, 13 Jul 2008 22:01:59 +0100, "N_Cook" wrote: Anyone familiar with strange transistor. capacitor and these IC markings such as "X2 080" ,"X8 761" ,"TL 761" (not opto) ,"X8 082" ,"X6 081" ,"X6 082" , V4007D (not CMOS 4000) Found in an old VEB Kombinat Mikroelektronik databook: B080D = TL080 B081D = TL081 B082D = TL082 B761D = TAA761 V4007D = CD4007UBE Best regards Piotr Thanks for that, I'd only assumed there was no use for 6 off CMOS inverter packs, assuming they were more likely to be quad opamp packs. Do you know why there are all thes +digit numbers on the ICs transistors and electrolytics ? the 2 main TO3 output Tesla devices are marked KD607 but also X69321 -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#4
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Bullet VM30 combo, GDR from 1990
thes +digit
should read these X + digit |
#5
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Bullet VM30 combo, GDR from 1990
On Mon, 14 Jul 2008 10:28:07 +0100, "N_Cook" wrote: Do you know why there are all thes +digit numbers on the ICs transistors and electrolytics ? the 2 main TO3 output Tesla devices are marked KD607 but also X69321 Sorry, I don't know. Perhaps they are date codes. Piotr |
#6
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Bullet VM30 combo, GDR from 1990
N_Cook wrote:
Do you know why there are all thes +digit numbers on the ICs transistors and electrolytics ? No idea about the electrolytics. On the semiconductors, it's the marking for production month and year (but I don't have the code handy). the 2 main TO3 output Tesla devices are marked KD607 but also X69321 The KD607 is a Czech npn power transistor, 10 A, 80 V, 70 W, designed for AF power amps. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) |
#7
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Bullet VM30 combo, GDR from 1990
Joerg Wunsch wrote in message
... N_Cook wrote: Do you know why there are all thes +digit numbers on the ICs transistors and electrolytics ? No idea about the electrolytics. On the semiconductors, it's the marking for production month and year (but I don't have the code handy). the 2 main TO3 output Tesla devices are marked KD607 but also X69321 The KD607 is a Czech npn power transistor, 10 A, 80 V, 70 W, designed for AF power amps. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) I only have one German data book , ECA from 1987 and it does not list the final uncertainty. An E-line size or varicap type package of a diode marked 32 VV or 32 YV, 32 volt zener ? -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#8
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Bullet VM30 combo, GDR from 1990
N_Cook wrote:
An E-line size or varicap type package of a diode marked 32 VV or 32 YV, 32 volt zener ? Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) |
#9
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Bullet VM30 combo, GDR from 1990
Joerg Wunsch wrote in message
... N_Cook wrote: An E-line size or varicap type package of a diode marked 32 VV or 32 YV, 32 volt zener ? Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#10
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Bullet VM30 combo, GDR from 1990
Joerg Wunsch wrote in message
... N_Cook wrote: An E-line size or varicap type package of a diode marked 32 VV or 32 YV, 32 volt zener ? Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#11
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Bullet VM30 combo, GDR from 1990
On Mon, 14 Jul 2008 18:30:15 +0100, "N_Cook" wrote:
Joerg Wunsch wrote in message ... N_Cook wrote: An E-line size or varicap type package of a diode marked 32 VV or 32 YV, 32 volt zener ? Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round I confirm that it's an SAY32 diode (25V, 50mA). Piotr |
#12
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Bullet VM30 combo, GDR from 1990
Piotr Piatek wrote in message
news On Mon, 14 Jul 2008 18:30:15 +0100, "N_Cook" wrote: Joerg Wunsch wrote in message ... N_Cook wrote: An E-line size or varicap type package of a diode marked 32 VV or 32 YV, 32 volt zener ? Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round I confirm that it's an SAY32 diode (25V, 50mA). Piotr Probably those are 32V zener. There are 2 more of that package on the preamp. These labelled 15 X4 and next to the +/- pass transistors for the preamp +/- rails so probably 15 Volt. I will be able to power up tomorrow and see -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#13
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Bullet VM30 combo, GDR from 1990
On Mon, 14 Jul 2008 20:19:17 +0100, "N_Cook"
wrote: Probably those are 32V zener. Doubtful, as 32V is not a standard E24 value. There are 2 more of that package on the preamp. These labelled 15 X4 and next to the +/- pass transistors for the preamp +/- rails so probably 15 Volt. Yes, it's possible that they are 15V Zener diodes of type SZX21/15, because the databook doesn't list any other diode with a part number 15. I also remember that these diodes were marked only with the voltage value, for example 9,1 for a 9.1V part. Piotr |
#14
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Bullet VM30 combo, GDR from 1990
"N_Cook" schrieb:
Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round Yes, it's an SAY32. The YV is -- again -- the datecode only. The SAY is left off from the marking, because it's been obvious, so only the 32 was really labelled. I uploaded the respective databook page to: http://www.sax.de/~joerg/say30-32-40-42.png -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) |
#15
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Bullet VM30 combo, GDR from 1990
"N_Cook" wrote:
Joerg Wunsch wrote in message ... N_Cook wrote: Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. http://home.graffiti.net/diverse:graffiti.net/32vv.jpg It's a SAY32 Some more data sheets for components from GDR: http://www.tu-chemnitz.de/etit/zentral/ddr/index.php KD607: http://www.datasheetarchive.com/pdf/1889080.pdf XL |
#16
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Bullet VM30 combo, GDR from 1990
Joerg Wunsch wrote in message
... "N_Cook" schrieb: Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round Yes, it's an SAY32. The YV is -- again -- the datecode only. The SAY is left off from the marking, because it's been obvious, so only the 32 was really labelled. I uploaded the respective databook page to: http://www.sax.de/~joerg/say30-32-40-42.png -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) Certainly the right package. I've now powered up and the 15 marked ones are the zeners for setting the +/- preamp rails. There was a burnt section of the ground track between the secondary ps side of the preamp and the signal side. Probably due to operator "error" and have replaced with a fuse there. The siting of the ones marked 32 maybe for overvoltage sensing , but not normally in service. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#17
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Bullet VM30 combo, GDR from 1990
Joerg Wunsch wrote in message
... "N_Cook" schrieb: Any chance to take a photo? My guess is it's an SAY32 which is a simple silicon small-signal diode. with a 2.5mm nut for scale http://home.graffiti.net/diverse:graffiti.net/32vv.jpg the pins are flat not round Yes, it's an SAY32. The YV is -- again -- the datecode only. The SAY is left off from the marking, because it's been obvious, so only the 32 was really labelled. I uploaded the respective databook page to: http://www.sax.de/~joerg/say30-32-40-42.png -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) second attempt Certainly the right package. I've now powered up and the 15 marked ones are the zeners for setting the +/- preamp rails. There was a burnt section of the ground track between the secondary ps side of the preamp and the signal side. Probably due to operator "error" and have replaced with a fuse there. The siting of the ones marked 32 maybe for overvoltage sensing , but not normally in service. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#18
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Bullet VM30 combo, GDR from 1990
"N_Cook" schrieb:
second attempt (Why? Your first attempt worked pretty well.) I've now powered up and the 15 marked ones are the zeners for setting the +/- preamp rails. Yes, the Zener diodes were just marked with the voltage in the first row, and the production date in the second row. The prefix SZX 21/ was implied. Kinda hard to distinguish them from the plain diodes marked 30/32/40/42, but as the maximal voltage for the Zeners was an SZX 21/24, there was just no collision in the numbering. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) |
#19
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Bullet VM30 combo, GDR from 1990
Repaired now, but for the archives there is a safety issue with these amps.
The earth bond wire to the amp chassis is fine but the bond to the front panel metal is very poor, just a brass rivet to the phenolic of the pcb, of a few ohms drop over the years. Needs redoing to the metalwork properly. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
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