家電維修工具中的萬用表是一種多功能、多量程的測(ce)(ce)量儀器，主要用(yong)于電(dian)(dian)(dian)(dian)路板和(he)(he)(he)電(dian)(dian)(dian)(dian)氣系統(tong)的故(gu)障檢測(ce)(ce)和(he)(he)(he)維(wei)修。 萬用(yong)表可以(yi)測(ce)(ce)量電(dian)(dian)(dian)(dian)壓(ya)、電(dian)(dian)(dian)(dian)流、電(dian)(dian)(dian)(dian)阻、電(dian)(dian)(dian)(dian)容、二極管和(he)(he)(he)晶體管的電(dian)(dian)(dian)(dian)壓(ya)和(he)(he)(he)電(dian)(dian)(dian)(dian)流等，它(ta)具(ju)有測(ce)(ce)量準確(que)度(du)高、穩定性好、響應(ying)速度(du)快(kuai)(kuai)、操作簡單方(fang)便等特點。可以(yi)幫助維(wei)修人員快(kuai)(kuai)速定位(wei)故(gu)障，準確(que)找出故(gu)障元件，從而快(kuai)(kuai)速修復故(gu)障。

維修工具中的螺絲刀是一種具有(you)金屬刀(dao)柄和木制手柄的(de)(de)旋(xuan)轉工(gong)具，通(tong)常具有(you)不(bu)同大小的(de)(de)刀(dao)頭，以(yi)適應不(bu)同規(gui)格的(de)(de)螺(luo)絲(si)(si)。螺(luo)絲(si)(si)刀(dao)可(ke)以(yi)用(yong)(yong)(yong)(yong)來擰緊或松開各種螺(luo)絲(si)(si)，如固定電(dian)器(qi)(qi)的(de)(de)螺(luo)絲(si)(si)、連接(jie)部件的(de)(de)螺(luo)絲(si)(si)等。此外，螺(luo)絲(si)(si)刀(dao)還可(ke)以(yi)用(yong)(yong)(yong)(yong)來拆卸(xie)和安裝(zhuang)電(dian)器(qi)(qi)部件，例(li)如開關、燈泡等。使用(yong)(yong)(yong)(yong)螺(luo)絲(si)(si)刀(dao)時需要注意安全，避免用(yong)(yong)(yong)(yong)力過大或使用(yong)(yong)(yong)(yong)不(bu)正(zheng)確的(de)(de)規(gui)格，以(yi)免損(sun)壞電(dian)器(qi)(qi)或傷(shang)害(hai)自己。

鉗子是(shi)一(yi)種常見的(de)家電維修工具，主(zhu)(zhu)要(yao)(yao)(yao)用(yong)(yong)(yong)于夾(jia)持、彎(wan)曲、切斷(duan)(duan)金(jin)屬材(cai)(cai)料，以及擰緊和松(song)開(kai)螺絲(si)。鉗(qian)(qian)子(zi)的(de)種類很(hen)多，包括尖(jian)嘴鉗(qian)(qian)、斜口(kou)鉗(qian)(qian)、剝(bo)線鉗(qian)(qian)、鯉魚(yu)鉗(qian)(qian)等。尖(jian)嘴鉗(qian)(qian)主(zhu)(zhu)要(yao)(yao)(yao)用(yong)(yong)(yong)于夾(jia)持細小的(de)金(jin)屬零(ling)件，如(ru)螺絲(si)、釘子(zi)等；斜口(kou)鉗(qian)(qian)主(zhu)(zhu)要(yao)(yao)(yao)用(yong)(yong)(yong)于剪斷(duan)(duan)金(jin)屬材(cai)(cai)料，如(ru)電線、鋼絲(si)等；剝(bo)線鉗(qian)(qian)主(zhu)(zhu)要(yao)(yao)(yao)用(yong)(yong)(yong)于剝(bo)離電線絕緣(yuan)層(ceng)；鯉魚(yu)鉗(qian)(qian)主(zhu)(zhu)要(yao)(yao)(yao)用(yong)(yong)(yong)于夾(jia)持管道和連(lian)接件，以及擰緊和松(song)開(kai)螺絲(si)。 在(zai)使用(yong)(yong)(yong)鉗(qian)(qian)子(zi)時(shi)，應注意安全，以免(mian)受(shou)傷。

試電筆由筆(bi)(bi)尖金屬體(ti)(ti)、電(dian)(dian)(dian)阻、彈(dan)簧和(he)(he)發(fa)光二極管(guan)等組成(cheng)，筆(bi)(bi)尖金屬體(ti)(ti)是試(shi)(shi)電(dian)(dian)(dian)筆(bi)(bi)的(de)核心部(bu)件，它可(ke)(ke)以通(tong)過接觸帶電(dian)(dian)(dian)體(ti)(ti)來(lai)檢測電(dian)(dian)(dian)流是否存(cun)在(zai)。當試(shi)(shi)電(dian)(dian)(dian)筆(bi)(bi)接觸帶電(dian)(dian)(dian)體(ti)(ti)時，電(dian)(dian)(dian)流會通(tong)過試(shi)(shi)電(dian)(dian)(dian)筆(bi)(bi)內(nei)部(bu)的(de)電(dian)(dian)(dian)阻，然后使發(fa)光二極管(guan)發(fa)光，從而得知電(dian)(dian)(dian)路是否通(tong)電(dian)(dian)(dian)。 試(shi)(shi)電(dian)(dian)(dian)筆(bi)(bi)的(de)特點是操作簡單(dan)、方便快捷、可(ke)(ke)靠(kao)性和(he)(he)經濟性高(gao)等，因(yin)此在(zai)家庭和(he)(he)工業領域(yu)被廣(guang)泛使用(yong)。

電烙鐵的主要作用是(shi)熔化焊錫將(jiang)元器(qi)件(jian)焊接到(dao)電路(lu)(lu)板上(shang)或把(ba)元器(qi)件(jian)從電路(lu)(lu)板上(shang)拆下來, 它是(shi)手工(gong)施焊的主要工(gong)具，在(zai)維(wei)修空調的電路(lu)(lu)故(gu)障(zhang)時經常會用到(dao)。電烙(luo)鐵按其(qi)功能(neng)分類，有(you)內熱(re)(re)式(shi)、外熱(re)(re)式(shi)、恒溫(wen)(wen)式(shi)、吸錫式(shi)及熱(re)(re)風(feng)槍等幾種。恒溫(wen)(wen)電烙(luo)鐵中(zhong)采用熱(re)(re)敏元件(jian)來測(ce)溫(wen)(wen)以控(kong)制加熱(re)(re)電路(lu)(lu)，從而使烙(luo)鐵頭保持恒溫(wen)(wen)，因而被(bei)廣泛(fan)使用。