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Ремонт электроники

ремонт телевизора

радиомастерская

телемастерская

как отремонтировать телевизор

ремонт электроники своими руками

как зарядить аккумулятор

как проверить батарейку

напряжение

ток

мощность

сопротивление

частота

мультиметр DT9208A

ICL7106

00:00:01

power supply, the electrolyte after the input

00:00:04

diode bridge turned out to be charged; the

00:00:06

multimeter was used in

00:00:08

diode testing mode and burned out, as it turned out,

00:00:12

it burned out seriously loudly with a bang, using the

00:00:14

example of this multimeter dt 90 208, and

00:00:18

in this video on the Radiomaster Info channel

00:00:21

it talks about diagnostics and repair with

00:00:24

replacement the main microcircuit of a drop on the

00:00:26

popular bird microcircuit

00:00:28

l70 106, when analyzing the materials that

00:00:32

were found during the repair, it turned out that

00:00:36

this microcircuit contains

00:00:40

80 percent of a multimeter of this class,

00:00:44

which can also be restored by analogy, this is what

00:00:48

this device looks like inside, the

00:00:51

indicator is disconnected, here is its connector, which

00:00:53

means the main microcircuit is in in the form of a drop

00:00:56

on the printed circuit board and six more microcircuit

00:01:00

switch parts two buttons connectors

00:01:05

looked attentively on the reverse

00:01:07

side convinced the core the crooked track

00:01:10

was soldered and turned on does not work anyway the

00:01:13

indicator is dark more visually the

00:01:16

damage is not visible rang the protection

00:01:19

diodes found two faulty ones here here it is here

00:01:23

no more close-up

00:01:25

showing

00:01:27

14207 also replaced them again turned it on

00:01:30

doesn’t work

00:01:34

on the Internet found several circuits of this

00:01:37

device all diverge a little but are

00:01:39

80 percent the same so they

00:01:41

help looked through the articles

00:01:44

found a good book like this and a

00:01:48

lot of useful information

00:01:50

established that the microcircuit is 7106

00:01:53

which is a drop it It can also be

00:01:57

produced in a case like a narrow one,

00:01:59

forty legs, and in a case like this, forty-

00:02:02

four legs. A typical microcircuit connection circuit

00:02:04

is like this.

00:02:11

Naturally, before replacing the microcircuit, you

00:02:13

need to check the serviceability of

00:02:15

this; just measure the mode at the

00:02:18

crown voltage under load; I

00:02:21

had eight forty-six volts and the

00:02:22

voltage between pins 1 and 26

00:02:26

was 8 volts the voltage between

00:02:29

pins 132 is stabilized by the

00:02:32

microcircuit itself should not be 3 volts plus

00:02:35

minus 0 0 5 hundredths of a volt for me it was also

00:02:38

normal the voltage between pins 32 and 36

00:02:41

should be 0 1 volt for the calibration

00:02:44

voltage is set by a resistor r2 on

00:02:48

assuring if according to the diagram you look at pin

00:02:52

39 there should be pulses of more than 30

00:02:55

kilohertz, the amplitude will be at least 5,

00:02:57

I had no external damage to the

00:03:02

parts and there are no tracks around the microcircuit,

00:03:06

so I definitely need to change it, I purchased the

00:03:09

7106 microcircuit in the default

00:03:12

forty-foot case, that is, it turns out that I

00:03:14

don’t have two terminals,

00:03:16

this is a low battery voltage, just

00:03:18

before the 26th terminal is shown here on the

00:03:21

slide and hold this is holding measurements

00:03:24

between 38 and 39, the water motifs will remain

00:03:27

free, the rest will all be sealed and in

00:03:30

accordance with the numbering, that is, the first

00:03:32

to the first and so on 40 In the forties,

00:03:36

how to constructively replace a microcircuit

00:03:38

drop with a large microcircuit 7106, for

00:03:42

this, the

00:03:43

accumulation needs to be drilled with a drill about

00:03:45

six millimeters, so I

00:03:47

started drilling from the opposite side of the printed circuit board

00:03:49

and then using a round file

00:03:51

to increase the diameter of the hole so that the leads

00:03:53

that went inside the drop were reliably

00:03:55

isolated from each other then there is so that

00:03:57

only the contacts on the board remain from the microcircuits,

00:03:59

then we prepare 40 wires

00:04:02

45 centimeters long, we

00:04:05

tin the contacts of these wires, we

00:04:08

also tin the contacts on the board, we

00:04:10

place the microcircuit on the opposite

00:04:12

side there is enough space and carefully

00:04:16

thread it one by one into the hole, we solder the

00:04:18

wires

00:04:19

in accordance with the numbers on the board, and so on on the

00:04:22

microcircuit itself you get this

00:04:24

picture from the side of the drop where the drop was

00:04:28

and this picture from the opposite

00:04:30

side

00:04:32

on the cover of the device which is now removed there

00:04:34

is a screen so that they close the terminals of

00:04:37

this microcircuit on the microcircuit dish

00:04:39

you need to stick any insulating material on the screen

00:04:46

after turning on the device started working but I didn’t

00:04:49

measure the capacitance of the capacitors and the frequency

00:04:52

had to be changed two more lm324 microcircuits

00:04:56

measuring the capacitance here it is

00:04:58

located smd 14 legs 4 operational

00:05:02

amplifiers and 7 3 fives

00:05:05

this is a change in frequency this microcircuit

00:05:07

these microcircuits are not in short supply are

00:05:10

inexpensive

00:05:11

I actually had them in a drawer instead of

00:05:14

7- mi three fives I set the timer one

00:05:16

thousand 6 mi-1 this is the same thing the device

00:05:19

worked fully

00:05:22

after repair the multimeter needs to be

00:05:24

calibrated for this you will need one

00:05:27

or more devices that you

00:05:28

trust before starting calibration in the

00:05:31

repaired multimeter you need to

00:05:33

install a new crown

00:05:34

or connect it to a 9 volt power supply

00:05:39

Apply vertical marks to the trimmer resistors with a marker so that, if

00:05:41

necessary, return them to their original

00:05:43

position, since the circuits have differences, you

00:05:46

can find the desired trimmer by trial method.

00:05:49

If you set a certain mode and the

00:05:51

resistor does not work, then return the

00:05:53

marks back. The check must be done

00:05:56

in all modes right now on on this

00:05:59

slide you see the designation of resistors

00:06:03

that I had to adjust a little,

00:06:05

here I removed 39 on the

00:06:10

stella gram gene on a working

00:06:13

microcircuit, these are what the impulse should be

00:06:15

all base attention

Description:

На примере цифрового мультиметра DT9208A рассказано о диагностике и ремонте с заменой основной микросхемы-капли на популярную ICL7106. Купить ICL7106 от 30р здесь https://hz.ru.aliexpress.com/premium/icl7106.html?SearchText=icl7106&d=y&tc=ppc&initiative_id=AS_20190114231113&origin=y&catId=202001107&isViewCP=y&af=208&cv=32638911&cn=46salnge8mqjq9zlzxbvdkjt1livstpr&dp=v5_46salnge8mqjq9zlzxbvdkjt1livstpr&af=208&cv=32638911&cn=46salnge8mqjq9zlzxbvdkjt1livstpr&dp=v5_46salnge8mqjq9zlzxbvdkjt1livstpr&afref=&aff_fcid=f252486702b14626b8457f6f8a020fcd-1710859262617-04892-_9G57Xi&aff_fsk=_9G57Xi&aff_platform=portals-hotproduct&sk=_9G57Xi&aff_trace_key=f252486702b14626b8457f6f8a020fcd-1710859262617-04892-_9G57Xi&terminal_id=2dba82b20809464681d3fbbb492eca4b Купить новый DT9208A от 530р здесь https://hz.ru.aliexpress.com/af/dt9208a.html?SearchText=dt9208a&d=y&initiative_id=AS_20190114224016&origin=n&catId=202001320&isViewCP=y&jump=afs&af=208&cv=32638911&cn=46salnge7fdbkx5qdik45md5se3jbqsb&dp=v5_46salnge7fdbkx5qdik45md5se3jbqsb&af=208&cv=32638911&cn=46salnge7fdbkx5qdik45md5se3jbqsb&dp=v5_46salnge7fdbkx5qdik45md5se3jbqsb&afref=&aff_fcid=449b841c1dbc4321a93a278c6ebf6e00-1710859262941-02868-_9G57Xi&aff_fsk=_9G57Xi&aff_platform=portals-hotproduct&sk=_9G57Xi&aff_trace_key=449b841c1dbc4321a93a278c6ebf6e00-1710859262941-02868-_9G57Xi&terminal_id=1e6589bc0fdf4b8a82afe4855b3e6740 Больше на http://radiomasterinfo.org.ua/ Информация для тех, кто хочет освоить ремонт электроники, научиться пользоваться мультиметром, разобраться, что такое ток, напряжение, мощность, частота. Получить короткую и емкую информацию, что такое сопротивление, конденсатор, диод, транзистор, микросхема, принципиальная схема. На канале рассматриваются такие темы как автомобильная электроника, альтернативная энергетика, независимая энергетика, ремонт телевизора, ремонт электроники своими руками. - Плейлисты: https://accounts.google.com/v3/signin/identifier?continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26hl%3Dfi%26next%3Dhttps%253A%252F%252Fstudio.youtube.com%252Fchannel%252FUC%252Fplaylists%26feature%3Dredirect_login&hl=fi&ifkv=ARZ0qKJOVBXL20BnHJddqORJota1xEBtOb6JG6kgFVxXlAWdvcogoPh-3wl3wpLYHzdZWhEZ8-i0dQ&passive=true&service=youtube&uilel=3&flowName=WebLiteSignIn&flowEntry=ServiceLogin&dsh=S-721067862%3A1710859261446495 - Подпишитесь: https://www.youtube.com/channel/UCl1RIYTe0X7y8z7Wv2czzjQ?sub_confirmation=1

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