PCB ko te taarua e mohiotia ana ko te kape PCB, te taatai ​​PCB, te kape PCB, te taatai ​​PCB, te hoahoa whakamuri PCB, te whanaketanga whakamuri ranei PCB. That is, on the premise of having physical electronic products and circuit boards, reverse analysis of circuit boards is carried out by means of reverse research and development technology, and technical documents such as PCB files, BOM files, schematic diagram files and PCB silkscreen production files of original products are carried out 1: 1, ka whakamahi i enei tuhinga hangarau me nga tuhinga whakaputa mo te mahi poari PCB, te waahanga maitai, te whakamatautau i te ngira rere, te poari poari ara iahiko, te whakakii i te tauira tauira o te poari taiawhio taketake.

Mo te poari taarua PCB, he maha nga taangata kaore e mohio, he aha te papa kape PCB, ko etahi ka whakaaro ko te papa kape PCB he kape. Ki nga maatauranga o nga taangata katoa, ko te shanzhai te tikanga o te peera, engari ko te kape PCB kaore rawa i te peera. Ko te kaupapa o te kape PCB ko te ako i nga hangarau hoahoa ara hiko hiko hou, katahi ka uru ki nga kaupapa hoahoa pai, ka whakamahi ai hei whakawhanake me te hoahoa i nga hua pai ake.

With the continuous development and deepening of the board copying industry, today’s PCB board copying concept has been extended in a wider range, no longer limited to simple circuit board copying and cloning, but also involves the secondary development of products and the research and development of new products. , hei tauira, na roto i te wetewete i nga tuhinga hangarau hua e rua, te whakaaro hoahoa, te hanga hanganga me te hangarau o te maarama me te korerorero, ka taea te whakarato i te maatauranga mo te rangahau me te whanaketanga o nga hua hou me nga korero whakataetae, hei awhina i nga waahanga rangahau me nga waahanga hoahoa. te wa e whai ake nei nga waahanga whanaketanga hangarau hou, te whakatikatika i te waa ki te whakapai ake i te hoahoa hua, te rangahau me te whanaketanga te nuinga kei te maakete i nga hua hou.

Ko te mahinga o te kape poari PCB ka mohio ki te whakahoutanga tere, te whakahou me te whanaketanga tuarua o nga momo taonga hiko na roto i te tangohanga me te whakarereke waahanga o nga konae hangarau hangarau. E ai ki te tuhinga tuhinga me te tuhinga hukihuki i tangohia mai i te kape PCB, ka taea hoki e nga kaihoahoa ngaio te arotau i te hoahoa me te huri i te PCB kia rite ki nga hiahia o te kaihoko. I runga i tenei kaupapa, ka taea hoki te taapiri i nga mahi hou mo te hua, ki te whakahou ranei i nga waahanga mahi, kia kitea ai te hua me nga mahi hou i roto i te tere tere me te tu hou, kaore i a ia ake ona mana whakairo hinengaro, engari kua wini i a ia te angitu tuatahi i te maakete, me te kawe mai i nga painga takirua ki nga kaihoko.

Ahakoa e whakamahia ana hei wetewete i te kaupapa poari taiawhio me nga ahuatanga mahi o te hua ki te rangahau whakamuri, ki te whakamahi ranei i te kaupapa o te hoahoa PCB mo te hoahoa whakamua, he mahi motuhake ta te PCB kaupapa. Na, e ai ki te tuhinga, ki te ahanoa ranei, me pehea te whakahoki whakamuri i te hoahoa anga PCB, he aha te mahi whakamuri? He aha nga korero hei aro maau?

I. Nga hikoi whakamuri:

1. Record PCB details

Tikina he PCB, tuatahi ki te pepa ki te tuhi i nga waahanga katoa o te tauira, taatari, me te waahi, tautautefito ki te diode, te ahunga o te ngongo e toru-waahanga, te ahunga katakata o te IC. He pai ake te tango pikitia e rua mo te waahi o nga waahanga me te kaamera a tihi. He maha nga papa PCB e anga whakamua ana i runga ake o te diode triode kaore etahi e aro ki te kite noa.

2. Scanned images

Tangohia nga waahanga katoa ka tango i te tine mai i nga rua PAD. Whakapai i te PCB me te waipiro ka tuu ki roto i te karapa e matawai ana i nga pika teitei ake kia ahua koi ake te ahua. Ana, pania kia ngawari te papa o runga me raro me te pepa miro wai kia piata mai te kiriata parahi. Whakauruhia ki te matawai, tiimata te PHOTOSHOP, ka paraihia nga papa e rua kia rite ki te kara. Note that PCB must be placed horizontally and vertically in the scanner, otherwise the scanned image can not be used.

3. Adjust and correct the image

Whakaritehia te rereketanga me te maama o te koaka, kia kaha te waahanga me te kiriata parahi me te waahanga kaore he kiriata parahi e rereke, katahi ka huri i te waahanga ki te pango me te ma, tirohia mena he maarama nga raina, ki te kore, korerohia tenei waahanga. Mena he maama, ka tiakina te pikitia hei pango me te ma nga konae BMP kohinga TOP BMP me BOT BMP, mena ka kitea he ahua raru te ahua ka taea te whakatika me te PHOTOSHOP.

4. Tirohia te tupono o te tuunga PAD me te VIA

Hurihia nga konae BMP e rua ki nga konae PROTEL, ka whakawhiti i nga papa e rua ki te PROTEL. Hei tauira, ko nga tuunga o te PAD me te VIA whai muri i nga paparanga e rua, he wa ano, e tohu ana he pai nga mahi o mua. Mena he rereketanga, korerohia te waahanga tuatoru. No reira, ko te kape poari PCB he mahi tino manawanui, na te mea he raru iti ka pa ki te kounga me te tohu taurite i muri i te kape a te poari.

5. Draw the layer

Convert TOP layer BMP to TOP PCB, make sure to convert SILK layer, the yellow layer, then you trace the line on TOP layer, and place the device according to the drawing in step 2. Mukua te papanga SILK i muri i te peita. Repeat until you have drawn all the layers.

6. Whakakotahitanga o TOP PCB me BOT PCB

Add TOP PCB and BOT PCB in PROTEL and combine them into one figure.

7. Taarua laser Tihi RANGA, LOTA ROTA

Whakamahia te miihini miihini taarua ki te taarua i te RANGA TAPU me te HUA RUA i runga i te kiriata maarama (1: 1 tauwehenga), whakauruhia te kiriata ki runga i taua PCB ka whakataurite mena he he, mena he tika, kua oti.

Whakamatau 8.

Whakamatauhia te mahi hiko o te papa kape kaore i te orite ki te papa taketake. If it’s the same then it’s really done.

Tuarua, whakarongo ki nga korero taipitopito

1. He tika te wehewehe i nga waahanga mahi

When reverse designing the schematic diagram of an intact PCB, reasonable division of functional areas can help engineers reduce some unnecessary trouble and improve the efficiency of drawing. Generally speaking, components with the same function on a PCB board will be arranged centrally, so that the functional division of areas can provide a convenient and accurate basis for reverting the schematic diagram.

Heoi, ko te wehewehe o tenei waahanga mahi kaore i te haere noa. Ko te tikanga me maarama nga kaiwhakangungu ki te matauranga hiko taiawhio hiko. Ko te mea tuatahi, tirohia nga waahanga nui o te waahanga mahi, ana ka ai ki te hononga waea waea ka kitea ki etahi atu waahanga o te waahanga mahi kotahi, te hanganga o te waahanga mahi. Ko te hanganga o te wawahanga mahi te putake o te tuhi kaupapa. Hei taapiri, kaua e wareware ki te whakamahi i te nama waahanga kei runga i te poari ara hei awhina i a koe ki te mahi tere i nga mahi wehewehe.

2. Rapua te waahanga turanga tika

Ka taea hoki te kii i tenei waahanga korero ko te tino taone nui o te pa hononga PCB i te tiimatanga o te tuhi kaupapa. I muri i te whakatau i nga waahanga tohutoro, ko te tuhi ma runga i nga tohu o enei waahanga korero ka taea te whakarite i te tika o te tuhi kaupapa ki te whanui.

Paerewa mo nga kaiwhakangungu, he tino mohio ehara i nga mea uaua, i te nuinga, ka kowhiri i nga waahanga ara hei tohu, he nui ake, he maha ake te waituhi, he tuhi whaihua, penei i te ara iahiko, panoni, transistor, aha. ., he pai hei tohu.

3. Te wehewehe tika i nga raina me te tuhi waea hiko whaitake

Mo te rereketanga o te waea whenua, te raina hiko me te raina tohu, me mohio nga kaiwhakangungu mo te tuku hiko, hononga ara iahiko, waea PCB me etahi atu. Ko te rereketanga o enei ara iahiko ka taea te wetewete mai i te hononga o nga waahanga, te whanui o te parahi parahi me nga ahuatanga o nga hua hiko ake.

I te tuhi waea waea, kia kore ai e whakawhiti te raina me te whakawhiti, ka taea e te whenua te whakamahi i te maha o nga tohu papa whenua, ka taea e nga momo raina te whakamahi i nga tae rereke o nga raina rereke kia maarama te kitea, no te mea ka taea hoki e nga momo waahanga katoa te whakamahi motuhake tohu, a taea noa te wehe i te huringa huringa waeine, ana ka whakakao.

4. Maarama i te angamahi taketake me te titiro ki nga hoahoa hoahoa rite

Mo etahi waahanga anga hiko hiko hiko me te tikanga tuhi kaupapa, me rangatira e nga kaiwhakangungu, kia kaua e kaha ki te tuhi tika, ki te hanga noa i te huringa hikoi, engari ki te hanga anga katoa o te ara hiko.

I tetahi atu, kaua e wareware kei te rite nga momo hua hiko i etahi ritenga rite ki te hoahoa a-roto o te taone whatunga PCB, ka taea e nga kaiwhakangungu te rite ki te kohi wheako, tino tuhi ki te hoahoa ara iahiko rite ki te kawe whakamuri o te hou. hua hoahoa hoahoa.

5. Tirohia me te arotau

I muri i te whakaahuatanga o te tuhinga tuhi, ka taea te whakatau i te hoahoa whakamuri o te hoahoa hoahoa PCB i muri i te whakamatautau me te tirotiro. The nominal values of components sensitive to PCB distribution parameters need to be checked and optimized. According to the PCB file diagram, the schematic diagram is compared, analyzed and checked to ensure that the schematic diagram is completely consistent with the file diagram.