Iron - Repair of monitors with Soviet parts.

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Track: mazdai1                          
Wu: Macros     
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Area: Radio-electronic / electrical
equipment                            
Subj: Repair of monitors by Soviet parts
lyami                                    
- SU.HARDW (2:5020/78.7) ---- SU.HARDW -
 From : Ed Chernovsky 2:5040/11.7    
 Subj : Re: NEC MultiSync               
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 Hi Boris,                             
                                        
  >> BD> in subj.  KT872 will no longer exist   
  >> work.                          
                                        
  >>It works on my 800x600 too. But on
  >> time I don't                         
                                        
  BD> :#% speech skip'nuta                
                                        
  >> CTX also installed KT872, it constantly
  >> in PCADe in fashion                     
  >> 1024x768 works - it seems okay.  
  >> But it overheats                   
                                        
  BD> It’s hard to believe that he can
  BD> installed the power supply,              
  BD> not on line?                   
                                        
  >> after all. By the way, nothing         
  >> is there anything quicker? Tried it          
  >> here is KT846 - with a huge radiator  
  >> works                           
  >> little by little... Well, very little by little. 
                                        
 Sometimes in bourgeois "transistors"
There is also a diode, type KD226A, the one that
with a white stripe. You put it in parallel
K-E KT846.  We tried it - it works
monitor and does not heat the transistor :)        
                                        
  BD> 30-60 kHz... Mmm.. High frequency
  BD> (9**) is certainly better, but...        
  BD> Maybe it’s all about power?   
  BD> Long-standing NEC stock n-p-n         
  BD>transistors (~ 3 kV 10A)         
                                        
      I want! How much is it worth?                 
                                        
  BD> Ours... it looks like nothing except 872   
  BD> there is no suitable body.      
  BD> I used to install KT828 - almost that  
  BD> same as 872                      
  BD> but in the TO-3 case. KT839 is not bad.
  BD> And KT846 seems to be for                 
  BD> line scan? 1500V but bad
  BD> crystal heat sink?             
  BD> Or 845, one of them is enough
  BD> low voltage or                 
  BD> I'm confused, Soviet reference books are already 
  BD> I haven’t bought it for a couple of years.              
 BD> some KT85*s have appeared, maybe
  BD> who will write the sign              
  BD> about new ones (last 4 years)       
  BD> transistors?.                     
                                        
  >> permanently in PCADe in 1024x768 mode  
  >> it works - it seems                   
                                        
  BD> And under what driver? WS-PCAD?  
  BD> I don’t like 1024x768, even  
  BD> on NEC DIAMOND SCAN               
  BD> while the brightness is low and         
  BD> vertical lines have          
  BD> shadow, I don’t know the output stage     
  BD> the video amplifier does not work,BD> or the cable is not matched; but I    
  BD> I use normal mode, even       
  BD> not 800 x 600, good Zin in pcad, 
  BD> and memory for the circuit -               
  BD> in my head :-)                      
                                        
- SU.HARDW (2:5020/75.7) ---- SU.HARDW -
 From : Dmitri Balukov 2:4615/1 
 Subj : SVGA monitor                    
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Hello Anatoly!                         
                                        
 AI> Hello Everyone. Here's the problem I have with 
 AI>monitor                          
 AI> EasyData - SVGA but 800x600, so    
 AI> he constantly flies, or      
 AI> scan transistor, or something else     
                                        
 We had the same thing on the same
monitor. And we burned some transistors
5-7 So maybe my advice will help. 
                                        
 AI> Can you tell me what I should change in it?  
 AI> necessary.                              
                                        
 KandyurchikIt's probably dried out there
find it like this... but in short, here's a piece
schemes.                                  
                                        
 |К ( Output transistor C3883 )   
+++ changes to KT838A            
| +---+ KDC11 included between K and E  
+++ B |   anode on E.                  
 |E +-+ 1.8k x V tu.  ^ 108 V 
-+- |                     ____ |       
    |  ____ +---+---:____:-++      
    +-:____:-+ |   |+ (      
             ) | ( ===  1Mkf L (      
             ) | ( -+- ^  (      
             ) | ( We had OH (__>k E
  ) | (_ dried +|BDX5ЧF
  |     |   1000 Mkf ===     
            -+- |             | (more 
 +->k K S2371 -+- here 
 check this)
                                        
 Well, as you guessed, the letters mean
(E)muttep, (B)aza, (K)ollektor.          
                                        
- SU.HARDW.RS.VIDEO (2:5020/140.13) ----
 From : Oleg Ogourtsov 2:469/5.3 
 Subj : o transactions in line. monitors!
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Hello All!                              
                                        
 While walking along Belokamennaya I bought some
heels brochure "Review of foreign
transistors" (Some kind of Moscow
bodyga stamps them), tried them at work
helped.                                
 There they are carefully considered
the following transistors: 2SA12...2SA1732,
2SB12...2SB1406, 2SC11...2S
S4523,2SD11...2SD2120,2N21...2N6776.    
 So I decided to share a little. Of course
not much news, but maybe someone xapeba
I'll reduce it - there are five fewer transistors
will burn.                                 
 Yes, and in general, it’s not a sin to share your experience.
Who cares, throw it in soap, or in
In the mail, only the presses are typing on the keys,
they decide like a composter for $^%, well this
as long as their tire breathes and the monitor
glows...                             
                                        
 Transistors used in lowercase
scan of video monitors                
                                        
                                        
Brand Ukb/Uke Ik R Replacement possible
                                        
2SC1875 1400/500V 3.5A 50W BU208,BU209, 
                           BU5O8A,      
                           2SD819,2SD850       
2SC1891 1200/400V 1.5А 50W BU204,BU205, 
                           BU206,BU705, 
                           2SC1922,     
                           2SD818       
2SC1892 1500/500V 2.5А 50W BU205,BU206, 
                           BU705,       
                           2SC1922,     
                           2SD818       
2SC1893 1500/500V 3.5А 50W BU208,BU209, 
                           BU5O8А,      
                           2SD819,      
                           2SD850       
2SC1894 1500/600V 5.0А 50W BU2О8А,      
                           BU5O8А,      
                           2SC2928,     
                           2SD820       
2SC1895 1500/600V 6.0А 50W BU908,BU5O8, 
                           2SDбЧ9,2SD821
2SC1896 1500/600V 7.0А 50W BU5O8,BU908, 
                           2SD822,      
                           2SD1016      
2SC1922 1500/800V 2.5А 50W BU205,BU206, 
                           BU705,2SDS75,
                           2SD818       
2SC1942 1500/800V 3.0А 50W BU208,BU209, 
                           BU705(А),    
                           2SD819,2SD850
2SC2123 1000/400V 12 А 50W (BUб26,      
                           2SD1094,     
                           2SD1279)     
2SC2124 2200/800V 2.0А     BU225,BU209А,
BU5O8А,2SD850
2SC2125 2200/800V 5.0А     -            
2SC3023 1500V     3.0А 50W BU208,BU209А,
                           BU5O8А,2SD850
2SC3024 1700V     3.0А 50W BU209,2SD784,
                           2SSD785      
2SC3025 1500V     6.0А 50W BU208(А),    
                           BU5O8(А),    
                           2SDбЧ9,2SD821
2SC3026 1700V     6.0А 50W -            
2SC3027 1500V     8.0А 50W BU5O8,BU908  
2SC3028 1700V     8.0А 50W -            
2SC3479 1500V     2.5А 80W BU5O8D,      
                           2SD1290,     
                           2SD1291      
2SC3480 1500V     3.5А     BU5O8D,BU706D
2SC3481 1500V     5.0А 120W 2SC3681,    
                            2SC4291,    
                            2SC4292     
2SC3482 1500V     6.0А 120W 2SC3681,    
                            2SC4292     
2SC3483 1500V     2.5А 80W BU5O8А,BU705,
                           2SD1493,     
                           2SD1494*     
2SC3484 1500V     5.0А 80W (BU5O8А,     
                            BU706,      
                            2SC3484,    
                            2SDЧ95)     
2SC3485 1500/800V 5.0А 120W 2SC3685,    
                            (BU5O8(А),  
                            2SD1496,    
                            2SD1497)    
2SC3486 1500/800V 6.0А 120W 2SC3685,    
                            2SC3686,BU5O8,      
                            2SD1496,    
                            2SD1497     
2SC3642 1200/800V 6.0А 100W -           
2SC3643 1200/800V 8.0А 140W -           
2SC3644 1200/800V 12.0А 150W -          
2SC3683 1500/800V 8.0А 150W -           
2SC3684 1500/800V 10.0А 150W  -         
2SC3684 1500/800V 6.0А 120W 2SC3486,    
                            (BU5O8А,    
                            BU706,BU908)
2SC3686 1500/800V 7.0А 1200W BU5O8,BU908
2SC3687 1500/800V 8.0А 150W -           
2SC3688 1500/800V 10.0А 150W -          
2SC3715 1500/600V 4.0А 50W BU5O8DF,     
                           2SC4293,     
                           2SC4294,     
                           2SD1555,     
                           2SD1556*     
2SC3716 1500/600V 5.0А 50W BU5O8AF,     
                           2SD1545,     
                           2SD1546,     
                           2SSD1655,    
                           2SD1656*     
2SC3719 1200/800V 5.0А 150W -           
2SC3720 1200/800V 10.А 200W -           
2SC3883 1500/800V 5.0А 50W BU5O8D,      
                           BU706D,      
                           2SC3481,     
                           2SC4291*     
2SC3884 1400/600V 6.0А 50W 2SC3894,     
                           (BU5O8AF,    
                           2SD1546,2SD1656)     
2SC3885 1400/600V 7.0А 50W 2SC3895,     
                           (BU5O8AF,    
                           2SD1547)     
2SC3886 1400/600V 8.0А 50W 2SC3896,     
                           (BU5O8AF)    
2SC3888 1400/600V 7.0А 80W 2SC3886,     
                           (BU5O8ABU908,
                           2SD1498)     
2SC3889 1400/600V 7.0А 80W 2SC3687,     
                           (BU5O8,BU908,
                           2SD1498)     
2SC3891 =2SC3884 диод к-э 2SC4122,      
                          2SC4294,      
                          (BU5O8DF)     
2SC3892 =2SC3885 диод к-э 2SC4123,      
                          (BU5O8DF)     
2SC3893 =2SC3886 диод к-э 2SC4124,      
                          (BU5O8DF)     
2SC3894 1500/800V 6.0А 60W (BU5O8AF)    
2SC3895 1500/800V 7.0А 60W (BU5O8AF)    
2SC3896 1500/800V 8.0А 70W (BU5O8AF)    
2SC3897 1500/800V 10.0А 70W -           
2SC3995 1500/800V 12.0А 180W -          
2SC3996 1500/800V 15.0А 180W -          
2SC3997 1500/800V 20.0А 250W -          
2SC3998 1500/800V 25.0А 250W -          
2SC4122 1500/800V 6.0А 60W 2SC4294,     
                           (BU5O8DF,    
                           2SD1556,     
                           2SD1652)     
2SC4123 1500/800V 7.0А 60W (BU5O8DF)    
2SC4124 1500/800V 8.0А 70W (BU5O8DF)    
2SC4126 1500/800V10.0А 70W (2SC3684)   
2SC4142 1500/800V 5.0А 50W BU5O8AF,     
                           2SD1545,     
                           2SD1546,     
                           2SD1655,     
                           2SD1656*     
2SC4143 1500/800V 5.0А 50W BU5O8AF,     
                           2SD1545,     
                           2SD1546,     
                           2SD1655,     
                           2SD1656*     
2SC4144 1300/500V 8.0А 50W BU5O8AF,     
                           BU908F,      
                           2SD1548      
2SC4435 1500/800V 5.0А 100W 2SC3485,    
                            2SC3486,    
                            2SC3685,    
                            (BU5O8А)    
2SC4436 1500/800V 6.0А 100W 2SC3486,    
                            2SC3685,    
                            2SC3686,    
                            (BU5O8А)    
2SC4437 =2SC4435       50W 2SC3894,     
                           (BU5O8AR,    
                           2SD1655,     
                           2SD1656)     
2SC4438 =2SC4435       50W 2SC3894,     
                           (BU5O8AF,    
                           2SC4143,     
                           2SD1656)     
                                        
      ******* ПРИМЕЧАНИЕ ********       
    
 Undesirable substitutions are indicated in brackets,
and "*" marks the most acceptable ones.