[Чиж Сергей]

убил целый день на этот хлам(в оригинале это Вьюс Е641-1Е.Симптомы -выгорает НОТ причем при включении.Причем один раз поймал осциллом как иох полез вверх в поднебесье в запретную зону в район 1.5кв
Все элементы при проверке прозвонке в норме(емкости проверены ESR метром..дроссель чоппера визуально и при подстановке в другой мон в качестве большой индуктивности ФБТ..
Тем не менее заменил согласно схеме на асер 7154е
1.ТДА 4858
2.Чоппер
3 С326
4.С306 (220мкФ) уменьшил до 100мкФ
5. исключил С327 (10мкф)
6. С211
7.R216 уменьшил с 160К (1%) до 120(5%)
имею следующую карту режимов
31кНz ИОХ =900в Uc306=35.4в +В =77.3в
37кНz ИОХ =900в Uc306=34.6в +В =92.9в
43кНz ИОХ =900в Uc306=35.0в +В =109.5в
47кНz ИОХ =950в Uc306=35.5в +В =122.0в
53кНz ИОХ =950в Uc306=36.6в +В =148.3в
У меня сложилось впечатление что просто затягивается процесс заряда С306 (а заряд С211 уже к тому времени закончен)и поэтому сигнал с него в период пуска не соответствует реальной величине ИОХ-отсюда перерегулирование и как следствие -пробой НОТ.
Igor.gm!!! у тебя, помнится, были такие же проблемы-отпиши чем закончилось у тебя.
Мон пока работает -думаю восстановить R216 (добавить ему +В) или оставить так как есть.
Может еще у кого нить наработки и мысли в этой связи есть?

[Rudolf]

Кто бодался с асер 7134/54
Eto chto u menia est po etomu povodu:
"C309 47/160, Check R272 12k-1/8w 1% . In Past We Have Also Changed For Being Low: C609 100/25 105c, C103 220/25 105c, C116, C136, C156 All 1/160 85c Caps"
I eche prover paiki na FBT i na transformatore zapuska.

[Rudolf]

Кто бодался с асер 7134/54
Eto chto u menia est po etomu povodu:
"C309 47/160, Check R272 12k-1/8w 1% . In Past We Have Also Changed For Being Low: C609 100/25 105c, C103 220/25 105c, C116, C136, C156 All 1/160 85c Caps"
I eche prover paiki na FBT i na transformatore zapuska.

[GaRR]

Если не ошибаюсь, в этой модели C335 вечный глюк.

[Чиж Сергей]

да .но к данному узлу он не относится никаким боком..Этот кондер меняю всегда по умолчанию не глядя.

[Root]

да .но к данному узлу он не относится никаким боком..Этот кондер меняю всегда по умолчанию не глядя.
Однажды попалась целая партия бракованных BU2520.... Ничего не мог понять.... Съездил купил в другом месте и монитор прекрасно работает до сих пор ....

[МИА]

Сергей,было как-то описание про цепочку R 319-21,25 и С308,17,22(по схеме 7134) - смотрел?

[Чиж Сергей]

Игорь, у меня только на 7134е7154е.А там половину указанных тобой позиционных обозначений не нашел.. Может, переложишь на 7134Е?

[лхю]

яУЕЛЮ ХГ №12 "пЕЛ. ЛНМХРП."ЖЕОНВЙЮ ХДЕР НР ЙНККЕЙРП мнрЮ ВЕПЕГ ДХНДШ 306 Х 309.....
ОНЯКЕДНБЮРЕКЭМШЕ ПЕГХЯРНПШ(319,320,321,325) Х ОЮПЮККЕКЭМН ХЛ ОНЯКЕДНБЮРЕКЭМШЕ ЙНМДЕМЯЮРНПШ(308,317,322) 1/450Б МЮ ГЕЛКЧ.

[Rush]

Ну может интересно.. эту цепь уже обсуждали вот тут
http://www.webforum.ru/mes.php?id=1819855&fs=0&ord=0&board=10477&lst=&arhv=yes

[Чиж Сергей]

Спасибо.только в 7134e этой цепочки нет да и формирователь +В преобразовательного типа...

[rezident]

МИА, ты путаешь 7134 и 7134e, это разные модели!

[igor.gm]

Wperwie po soobsh-cheniju „ANATEK“ pojawilos upominanie pro R216—100kom i R220---68kom. Prosba , kto posilnee w English, perewesti 2 poslednih woprosa na Russkij (410-1 i 410-2).
WWW.anatekcorp.com
QUESTION NO. P1124-8: IBM 2124/Acer 7154E monitor came in with shorted HOT. Replaced that & c335 220p/2kv, r214/15k. still no HV start. 48v on collector of HOT, Q316 * 317 OK. deflection IC TDA4858 warm to touch.
The most probable culprit is a shorted coil L304, p/n#19.40133.001. It`s best to ring it, but if you cannot, and it`s testing below its 2 mH inductance, or it appears at all discolored or burnt, or it runs very warm, replace it. Also check D316 and D317. Note, sometimes, the diodes & transistors in this unit will not test out as shorted, and yet still have high reverse leakage, so be aware of this.



QUESTION NO. P716-2: IBM-2124 (FCC JVP7154E) monitor also known as Acerview 7154. Need replacement for L304 2mH measured at 768uH and a source.
Try a Mitsubishi, or an Acer (FCC#JVP) supplier, part number 19.40133.001 is L304. In the US, Gastron Technology (626-813-1503), ICM (800-445-1503), and Marcus & Assoc. (800-445-1503), among others, have carried Acer parts.



QUESTION NO. P77-2: IBM 2124 monitor. The horizontal output Xister was S/C. Replaced ok. When fired up a small disc ceramic cap off the Collector of the H/output Xister was s/c. This caused a resistor connected to the cap to burn open. I measured the B+ at voltage a the H/out collector and only had 50 DC. Also no base drive to the H/output. What is the value and working voltage of the disc ceramic cap? What is the vaule of the 1/8 watt resistor connected to the cap? What should the B+ voltage be at the Collector of the H/output? Where is this voltage fed from?+?
If the FCC# on this IBM is JVP7154E, then the ceramic cap is C335 = 220pF/2KV, the resistor R214 = 15K ohm. In VGA mode, expect the B+ at the HOT collector to be around 78 VDC, with 1200 Volts peak-to-peak. The FET for B+ regulation is mounted on the same heatsink as the HOT, but check out both Q316 and Q317, also coils L304 and L305 and assoc. components.


QUESTION NO. P45-8: Acer 7154e monitor. Transistor K22161 and BU2520AF have died. What their analogues and characteristics?
I think you actually meant K2161, which is Q317 in this unit, a Sanyo FET = 2SK2161, rated 200V, 9 Amp, Rds[on]<0.35 ohm, 25 W., insulated TO220 case. A sub is IRF630 with insulating hardware. BU2520AF is a Philips horiz. deflection transistor, rated 1500 Vcbo, 800 Vceo, 10 Amp, 45 Watt, Tstg = 4.5 usec typical, Tf = 0.35 usec typical, DC gain (0.1 Amp) = 13 typical; SOT199 case, no internal damper diode. This transistor is readily available and inexpensive (in North America, at least); I recommend using the original type, but if not, possible subs might be Hitachi`s 2SC5207A or Sanyo`s 2SD1887. One source for all these is B&D Enterprises (800-458-6053). In this model, I suggest you also replace ceramic cap C335 = 220pF/2KV for this symptom.
The problem is also true for a HP monitor model D2825 (or ULTRA VGA 1024). The transistor 2SK2161 is equal at IRF630 or IRFI630.





QUESTION NO. P331-9: Acer 7154e 15" monitor. Transistor K2161 is dead. I cannot find it, what is analog and its characteristic?
K2161 is a Sanyo 2SK2161 FET, its characteristics are 200 Volt, 9 Amp, 25 Watt, Rds[on] <0.35 ohm at 4.5 Amps, in an insulated TO220 case. B & D Enterprises (800-458-6053) lists 2SK2161 for $2.90. Or use IRF630 with insulating hardware. For this fault, better also check C335, coil L304 (2 mH), D316 & D317 as well.


QUESTION NO. P21-4: Acer 7154E monitor FCC JVP7154E. The previous tech swapped original tube for Orion (M36KXU110XX61) with its own yoke coil not original yoke. This mismatch caused HOT to blow when driving above certain H freq. Where can I purchase a used original yoke? If this Orion tube is incorrect, what is a suitable tube sub supposing that yoke is taken care of?
It is MUCH easier to substitute an entire CRT/yoke assembly, than to try and fit another yoke onto a CRT, and then afterwards get acceptable convergence. If the horizontal and vertical yokes of the original and replacement yokes have about the same inductance readings, and the CRT parameters (neck size, diagonal, pinout, etc) match, a CRT/yoke combination usually can be substituted. For 15" CRT`s of this type, I would guess that the vertical yoke is about 6 mH, and the horizontal yoke is about 0.18-0.20 mH inductance. If your replacement CRT has a yoke with about these values, it seems more likely to me that there is an additional fault that is blowing the circuitry, than it would be the fault of the replacement CRT/yoke. If the horizontal yoke inductance is closer to 0.3 mH, then it is too slow; find a closer replacement.


QUESTION NO. P1124-8: IBM 2124/Acer 7154E monitor came in with shorted HOT. Replaced that & c335 220p/2kv, r214/15k. still no HV start. 48v on collector of HOT, Q316 * 317 OK. deflection IC TDA4858 warm to touch.
The most probable culprit is a shorted coil L304, p/n#19.40133.001. It`s best to ring it, but if you cannot, and it`s test

[igor.gm]

Wperwie po soobsh-cheniju „ANATEK“ pojawilos upominanie pro R216—100kom i R220---68kom. Prosba , kto posilnee w English, perewesti 2 poslednih woprosa na Russkij (410-1 i 410-2).
QUESTION NO. P410-1: Acer 54E Monitor the display goes off in about a minute of being on. Then it flashes on and off. C335 dark brown, D316 OK in circuit, Q317 shorted. Replaced & burnt in no time. OK in Circuit, L304 .8 ohms, R214 12.83Kohms, D317 OK in circuit.
If C335 and Q317 both burned again, first use a good-quality disk cap for C335, 220 pF at 3KV is recommended. Along with Q317, the D317 and L304 form a boost circuit, to raise the raw B+ (45V) going to the HOT. I do not trust ohms readings to check L304, you need an inductance value; nor is in-circuit testing D317 adequate. L304 is nominally "2 mH", but many good L304`s will measure 0.8 mH on an inductance meter. However, if the inductance of L304 falls much lower than that value, the excess current will blow Q317. Ultrafast rectifier D317 must be tested for reverse leakage out-of-circuit. Replace it if any reverse leakage is observed. Although the value of R214 = 15K ohm is not truly critical, in this situation, I would replace it anyway. It seems out-of-spec; I would be concerned that it has been damaged, and that your meter`s resistance reading may be quite different from its resistance value at high voltage and high frequency. If that is the case, IC201 may be damaged as well, and need replacing. Also check that the values of precision resistors R216 & R220, going to the B+ sense pin (pin 4) of IC201, are still at the correct value.


QUESTION NO. P410-2: Acer 54E Monitor has a blinking green led and a clicking noise on the board. Q310 B C E Out of Circuit + - .55, - + OL, + - .48, - + OL, + - OL, - + OL, C335 Burnt, D316 OK Out of Circuit, L304 .8 ohms, R214 Burnt, D317 OK in circuit.
Because R214 = 15K ohms is burnt, IC201 = TDA4858 probably needs replacing. Be sure to use a good-quality disk cap for C335; although 220 pF/2KV is usually installed, it is better to use a 3KV rating. Mouser Electronics (www.mouser.com) has these, in the US. Check R216, R220, off pin# 4 of IC201, for value, check D317 for leakiness, and check the inductance of L304. For that Q310, I can`t tell which pins go with which ohms, but it seems appropriate, since this HOT has no internal damper.

R220---68 kom
R216---100 kom
Eto w sheme i w moem monitore. Pomerjano.

[igor.gm]

Moj monitor: ACER 54E Mo: 7154E FCC ID: JVP7154E
S moim monitorom bilo do segonja poka NIKAK, no posle soosh-chenija Sergeja pro R216, posmotrel i u menja . R216 pomerjal kak 300kom, hotja tam po markirowke wsego 100kom. Sawtra menjaju i skaszu resultat.
Po sheme i w moem monitore eti soprotiwlenija( idut na IC201-TDA4858-Pin4):
R216 –100kom;
R220--68kom;

Kak ja ranshe pisal , transistor chopera dlja perwonachalnogo progona moszno prosto wikinut. +45V cheres L304—D317—L305 podaetsja na FBT i nichego ne gorit. Rasumeetsja kartinka budet iskaszena. No etogo budet wpolne dostatochno , chto bi prowerit zep, gde letit C335, naprjaszenie (40V) na IC202 TDA4866 (Pin7) budet estestwenno saniszeno. I prowerit saniszennie 40v na IC201 TDA4858 (Pin4) .

Sergej, R216 ne dolszno bit 160kom !!!!!!!!!!!
Tolko Summa R216 i R220 dolszna bit 160kom!!!!