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Dogbolter

Dogbolter

Firkin Brewery Dogbolter

Great beer from way back. Ramsgate Brewery's version is still based on the original 1993 recipe. The abv varied from 5.6% to 6%.

Category : About Beer
Published : Nov 21 2021, 09:27:26 AM

Same Brewery BOM Again

Same Brewery BOM Again

So why has the same brewery got beer of the month again?

Analysing the logs with goaccess

zgrep -h -i 'manufacturerid' access_log* | goaccess -a -o report.html --log-format=COMBINED

As can be seen from the report, it mainly seems to be down to SemrushBot-BA. This is probably not nefarious, but guess it's time to see if this can resolved. Rather than using robots.txt (which they seem to ignore) we can filter these out easily. Fun and games.

I guess this will effect the overall site hit counts, but reflects more realistic visitor numbers.

Category : Technology
Published : Oct 01 2021, 02:49:12 PM

gregh

Vestel 11ak37-11 Fault Finding

Some fault finding tips to repair the pesky board

11ak37
FAULT LED RED FLICKERS CONTINUOUSLY NO VOLTAGES HIT GAUGE MEASUREMENT RESULT 45UF250V THERE IS A LENTILS AT THE BOTTOM OF THE CONDS 221PF CHANGE THE SQUARE

. The tv does not work. I tried the eprom. The supply voltages are coming. The output is not driven.
Repair: When I disconnected the 49th end of the IC that says lfb, the oscillator worked. The d617 in the hsync circuit seems solid. But change the tv worked

11ak37-13 vertical narrow D601

Vestel 11ak37-11 Fault: The device is constantly burning horz.tr Q601 BU2508A (1-2 minutes) later) At the same time, R639 10K resistor is on. (Voltages are normal)
Repair: C653 47nf 250v and (C618?) 470pf 2kv capacitors are faulty

Vestel 11ak37-11 Fault: Led is on red, when the program key is pressed, it turns green for a moment and turns red again +B voltage comes out for a moment and switches back to stby
Repair: C838 470uf/16v on the leg of 7805 is faulty

11ak37-11 fault: there is sound, no picture.

Solution: C 635(47nj). R 639(10k), R 423(2,2k), D 407(1N4148) are faulty, switchmode creaks when triggered
block C tv does not work, the supply does not run normally, the reason is r639-10k-roasted c653-47n is burst or when open circuit stv2248-49- The 2,2 k attached direct on the leg no. is open circuit, the cause of this fault is c-653-type or -c619

Vestel 11ak37-11 Fault: no high voltage. The r639 10kohm resistor is on, I changed it, but the oscillator sign of the high voltage transistor does not appear. The high voltage does not work:
Repair :C_653 = 47Nf D_407 = 1N4148 R_246 = 2K2 R_639 = 10K I

11AK37 DEAD REPLACE IC800+Q801+C860+D892+D893+R805+R852+ LINEOUTPUT TRANSISTOR (BU2508AF).
11AK37 DEAD THE SET FAILS TO START- CHECK C810 FOR OPEN CIRCUIT.
11AK37 DEAD IC800+Q801+D892+D893+R805+R852+R855.
11AK37 DEAD THE FRONT LED IS FLASHING, REPLACE Q601+ IC800+ D892+D893 & REPLACE R807 AND R834 WITH 0.47R TYPES.
11AK37 DEAD THE FRONT LED IS FLASHING IC 500 FAULTY.
11AK37 WIDTH EXCESSIVE CHECK C622 (12nF 350v) FOR SHORT CIRCUIT.
11AK37 FIELD SHIFT DOWN,SERVICE ADJUST GREEN,VPI.
11AK37 NO OSD CHECK CONNECTOR PL407 MODULE.
11AK37 THE POWER SUPPLY IS BLOWN , THE FOLLOWING COMPONENTS WILL OFTEN NEED REPLACING IC 800 + IC801+ Q801 + D894 + D893+ D892+ R852 +R805 + R834 + R807 + R831 THE OFFICIAL MODIFICATION IS TO INCREASE THE VALUE OF R801 FROM 1K TO 4.7K- THIS SHOULD PREVENT A REPEAT PSU BLOW UP.

Check TH800 degausing PTC for short. Test with a 240v bulb, ie the bulb should go out after about 1-2 minutes when plugged in. Internals need time to warm up.

switching to protection : d805
no high voltage : d617
vertical narrow : d601 Q601
breaking : c653 switching to protection : c838
no high voltage : c635 r639 r426 d407
supply beeping : c809
screen is dark : c903 is
narrow on 4 sides : ic601 is
back and widening lines and the screen is also : c833
shuts down while running : ic802 starts
hard when triggered and beeps a few times : r842 r847
supply output voltages bounce there is a slight noise : ic900
Q601 breaks : c621
vertical line : c627

###

If it does ....... "zic ... zic .... zic ...." Or "cip ... cip ... cip ..."

Then it means he's probably in protection:

Detach the horizontal final (BU 808DF) placed next to the flyback, and see if it still goes into protection.

In fact you can disconnect the horizontal final, (take it off right) then connect a common 60 watt 220 volt filament lamp with the ends between the emitter (ground) and the collector (where the central of the bu was soldered).
If the protection was given by the shorted final, the power supply no longer goes into protection and therefore the bulb should also turn on.

If, on the other hand, the "zic ... zic .." continues there are other causes.

vestel 11ak37-11 board the capacitor C621

###

https://monitor-net-ru.translate.goog/forum/threads/418109/?_x_tr_sl=ru&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=nui,sc
Switching won't start : Replace: C619, C618, C653, R639, R426, D407. Possibly R427 27K reduce to 4.7K

Sound no picture : Replace: STV2248H, C653 (47n / 250V), R426 (2K2) SMD, and R639 (10K).

Have you ever checked the regulation with the MCR (D889)? In addition, the two resistors that are in the control (R817, R854)? In which volt range does the + Ub fluctuate?

###
Check & replace all of the following. DIODE D800, (BA159) IN THE SNUBBER NETWORK GONE LEAKY CAUSING THE PSU TO GO INTO OVERCURRENT MODE. CHECK AND REPLACE R817 IN B+ SENSING CIRCUIT, 130KOHM RESISTOR (RESISTOR IS LOCATED BELOW THE TWO RECTIFIER DIODES IN THE PSU SECONDARY) HT RAIL 12 VOLTS - D808 CHECK THIS CANT REMEMBER ITS VALUE IF ITS DEAD SHORT REPLACE I HAVE LISTED BELOW D808 S/C. REPLACE D808, Q801 (FET) AND IC800 (MC44608) AND CHECK SURROUNDING COMPNENTS. IF D808 FAILS AGAIN AT SWITCH ON, REPLACE C809.
###

I advise you to change: -Q601, -R639, -C621, You never know -R612, -Q602

Controls:

-D603, -R634, -R640, -D617, -R689, -D661, -R697

###

excessive width with the sides of the picture bowing in
Replace C622 (12nF/630V).
Check R612 (2R7/0.5W), L604, R629, Q603, IC401, D611, R606 and C626.
Check C630 (470nF), Q603 (BUK444) and R629 (1R).
Replace EEPROM.

I think C622 is the likely one.

###

PSU MODKIT51

http://www.razyboard.com/system/morethread-vestel-gebro_elektronik_world-2085372-5372937-0.html
11AK37-11 FIELD COLLAPSE D616 (RGP15J) , R675 (0.47, 0.5W
11AK37
11AK37 CCT DIAG PSU CCT IN TV MAG JAN2005 PAGE139/140
11AK37 FREE CIRCUIT HTTP://FILESHARE.ESHOP.BG/DOWNLOAD.PHP?FILEMODEL=11AK37
11AK37 POOR CONTRAST, ANY IDEAS.? BEAM LIMITER ?
11AK37 PSU MODKIT51 FROM WWW.GRANDATA.CO.UK
11AK37 SERVICE MODE, MENU THEN 4725
11AK37 BENT SIDES EW,C625(120NF)
11AK37 BENT SIDES L600(15MH),L603(1MH),R612
11AK37 BRIGHT BITS PULL,EHT CABLE CORRODED INSIDE
11AK37 DEAD C801/C802(22N2F275V XRATED)
11AK37 DEAD C812(1NF2KV),2A5T
11AK37 DEAD C822(220PF1KV)
11AK37 DEAD CHOPFET(2SK3115),MC44608P40,IC801(ET1102),R805,R852(33R),D894(1N4148)
11AK37 DEAD CHOPFET(NTP6N60F),MC44608 ,R801(4K7),D892,D893(BA159)
11AK37 DEAD D804,D892,D893(BA159)
11AK37 DEAD IC800 RP06(3M9)
11AK37 DEAD IC800,Q801,C860,D892 D896 R805 R852 ,LOPTR(BU2508AF)
11AK37 DEAD IC800,Q801.D892,D863,R805,R852,R855
11AK37 DEAD LED FLASHES,C827(4700UF16V) C838(4700UF16V)
11AK37 DEAD LOPTR(BU2508AF)CAUSE C618(3N9F1K6V/2N2F2KV),C625(12NF)
11AK37 DEAD LOPTR,C618(3N9F1K6V),C625(120NF)
11AK37 DEAD MC44608 KIT(V30011968),R801(4K7)
11AK37 DEAD MC44608 R801(4K7),OPTO(30015087) D809(1N4007),D804,D892,D893,R831,R850(22R)
11AK37 DEAD MC44608,CHOPFET,D894,D893,D892,R852,R805,R834,R807,R83,OPTO(SFH67A)
11AK37 DEAD MC446080P40 STP6NC60FP,R817(130K)
11AK37 DEAD PULSING D810(UF5408)
11AK37 DEAD PULSING LOPTR(BU2508AF).HT READS 141V
11AK37 DEAD PULSING LOPTR(BU2508AF)CAUSE C618(3N9F1K6V/2N2F2KV)
11AK37 DEAD PULSING Q601 LOPTR(BU2508AF).HT READS 141V
11AK37 DEAD PULSING R817(100K)
11AK37 DEAD RP06(3M9)
11AK37 DEAD SEME PSU REPAIR KIT(RK351)
11AK37 DEAD T2A5 C860(1NF2KV)
11AK37 DEAD/STBY LED ON,X501(4MHZ)
11AK37 DEAD/STBY LED PULSING,R803(22K SM),IC801(OPTO)
11AK37 DISABLE TRIP,REMOVE D889(MCR22 SCR)
11AK37 EW BENT SIDES,C622(12NF630V)
11AK37 EW BENT SIDES,NOT C622(12NF630V) OR C621 HELP?
11AK37 EXCESS WIDTH,C622(12NF630V)
11AK37 FIELD COLAPSE D616(RGP15J) D613(READS BAD BUT IS OK),R675(0R47)
11AK37 FIELD COLAPSE STV9306A,R675(0R47)
11AK37 FIELD SHIFT DWN,SERVICE ADJUST GREEN,VPI
11AK37 FLYBACK LINES C604(100UF63V) IC601 STV9306
11AK37 GREEN PIC,PL405
11AK37 HI HT,R845(68K),R817(68K),C810(33UF50V)
11AK37 INT NO GREEN,CRT(W66ECK001X13 PHILIPS)
11AK37 INT SHUTS OFF,R830((1R2W) IN HT LINE,C837,Q803
11AK37 LINE COLLAPSE R612(2R7),C627(820NF250V)
11AK37 LINE SHIFT,R683(2K2)
11AK37 LO CONTRAST, Q604(BC848B SM)
11AK37 NO OSD CONNECTOR PL407 MODULE
11AK37 NO SOUND REPROGRAM EEPROM CONTACT TOSHIBA SAY ITS A 24W33B
11AK37 NO TUNING NO33V,RR829 D533(H71 33 VOLTS STABILIZER)
11AK37 PIC FICKERS,HI HT,R817(68K),R854(68K)
11AK37 PSU MOD CHANGE R801 TO 4K7 FROM 1K
11AK37 SMOKING LOPTX(10763020/30015950/HR8790)
11AK37 STBY GRREN LED PULSING, ZD901(8V2 SM)
11AK37 STBY LED PULSING D810(UF5408)
11AK37 STBY PEEPS,OPTO(V300015087)
11AK37 TOO WIDE AND BENT SIDES ,C622(5NF630V) +RESOLDER ALL AREA
11AK37 VERT SHIFT,IN SERV MODE PRESS GREEN TO ACCESS, SELECTING VP1
11AK37 WIDE PIC EW BENT SIDES C622(630V12NF)
##

Category : Technology
Published : Sep 03 2021, 05:58:45 PM

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