電機(jī)IC693MDL240RR
.功能與參數(shù)測試
1.<測試儀>對器件的檢測,僅能反應(yīng)出截止區(qū),放大區(qū)和飽和區(qū).但不
能測出工作頻率的高低和速度的快慢等具體數(shù)值等.
2.同理對TTL數(shù)字芯片而言,也只能知道有高低電平的輸出變化.而無
法查出它的上升與下降沿的速度.
四.晶體振蕩器
1.通常只能用示波器(晶振需加電)或頻率計測試,萬用表等無法測量,
否則只能采用代換法了.
2.晶振常見故障有:a.內(nèi)部漏電,b.內(nèi)部開路c.變質(zhì)頻偏d.外圍相連電
容漏電.這里漏電現(xiàn)象,用<測試儀>的VI曲線應(yīng)能測出.
3.整板測試時可采用兩種判斷方法:a.測試時晶振附近既周圍的有關(guān)
芯片不通過.b.除晶振外沒找到其它故障點(diǎn).
4.晶振常見有2種:a.兩腳.b.四腳,其中第2腳是加電源的,注意不可隨
意短路.
五.故障現(xiàn)象的分布
1.電路板故障部位的不完全統(tǒng)計:1)芯片損壞30%, 2)分立元件損壞30%,
3)連線(PCB板敷銅線)斷裂30%, 4)程序破壞或丟失10%(有上升趨勢).
2.由上可知,當(dāng)待修電路板出現(xiàn)聯(lián)線和程序有問題時,又沒有好板子,既
不熟悉它的連線,找不到原程序.此板修好的可能性就不大了.
電機(jī)IC693MDL240RR
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IC693ALG222RR |
IC693ALG223RR |
IC693ALG390RR |
IC693ALG391RR |
IC693ALG392RR |
IC693ALG442RR |
IC693APU300RR |
IC693APU301RR |
IC693APU305RR |
IC693BEM320RR |
IC693BEM331RR |
IC693CHS391RR |
IC693CHS392RR |
IC693CHS393RR |
IC693CMM301RR |
IC693CMM302RR |
IC693CMM311RR |
IC693CMM321RR |
IC693CPU311RR |
IC693CPU313RR |
IC693CPU321RR |
IC693CPU323RR |
IC693CPU331RR |
IC693CPU350RR |
IC693CPU351RR |
IC693CPU352RR |
IC693CPU360RR |
IC693CPU363RR |
IC693CPU364RR |
IC693DSM302RR |
IC693MAR590RR |
IC693MDL230RR |
IC693MDL240RR |
IC693MDL241RR |
IC693MDL310RR |
IC693MDL330RR |
IC693MDL340RR |
IC693MDL390RR |
IC693MDL641RR |
IC693MDL645RR |
IC693MDL646RR |
IC693MDL655RR |
IC693MDL730RR |
IC693MDL731RR |
IC693MDL740RR |
IC693MDL742RR |
IC693MDL752RR |
IC693MDL753RR |
IC693MDL930RR |
IC693MDL931RR |
IC693MDL940RR |
IC693MDR390RR |
IC693PCM301RR |
IC693PCM311RR |
IC693PRG300RR |
IC693PWR321RR |
IC693PWR322RR |
IC693PWR330RR |
IC693PWR331RR |
IC800MCUB12310XNRR |
IC800SSD104RS1RR |
IC800SSD107RS1RR |
IC800SSI104RD2RR |
IC800SSI104RS1RR |
IC800SSI104S1RR |
IC800SSI107RD2RR |
IC800SSI107RS1RR |
IC800SSI216RD2RR |
IC800SSI228D2RR |
IC800SSI228RD2RR |
IC800SSI420RD2RR |
IC800STI105P2RR |
IC800STI105S1RR |
IMC-313D-X-DRR |
IMC-316P-X-DRR |
IMC-31CE-2-DRR |
IMC-78005773RR |
MTR-3N24-G-R-0-N-SRR |
MTR-3N32-H-R-0-N-SRR |
MTR-3S33-G-R-0-E-SRR |
MTR-3S43-G-R-0-C-SRR |
MTR-3T43-H-R-0-M-0RR |
MTR-3T69-G-R-0-M-0RR |
OIP-73005594RR |
OIP-73005774RR |
OIP-DSP1-CRR |
TGT-000A-2-0RR |
TGT-000A-4-0RR |
TGT-3X6L-1-0RR |
TGT-AI0V-8-0RR |
TGT-E00A-2-0RR |
TGT-S000-1-1RR |
TGT-S00N-1-1RR |
OMIOLM001 |
V1SD-W-5M-PUR-ABG-V45-G |
V1SD-W-2M-PUR-ABG-V45-G |
V1SD-W-1M-PUR-ABG-V1SD-W |
V1SD-G-GN5M-TPE-A1S-V45-G |
V1SD-G-GN2M-TPE-A1S-V45-G |
V1SD-G-GN1M-TPE-A1S-V45-G |
V1SD-G-GN1M-TPE-A1S-V1SD-G |
V1SD-G-GN0.5M-TPE-A1S-V45-G |
V1S-T-V1 |
V15S-YEE-V15/V15 |
V15S-G-1M-PUR-V15S-G |
V15L-W-5M-PUR-U |
V15L-W-1M-PUR-U-V15L-W |
V15L-G-5M-PUR-U |
V15L-G-3M-PUR-U |
V15L-G-1M-PUR-U-V15L-G |
V15-G-BK2M |
V1-W-BK5M-PUR-U-V1-W |
V1-W-BK5M-PUR-U-V1-G |
V1-W-BK3M-PUR-U-V1-G |
V1-W-BK1M-PUR-U-V1-G |
V1-G-BK5M-PUR-U-V1-G |
V1-G-BK3M-PUR-U-V1-G |
V1-G-BK1M-PUR-U-V1-G |
ICA-AI-I/U-IO-V1 |
ICA-A0-I/U-IO-V1 |
ICA-16DIO-G60AL-IO |
ICA-16DI-G60A-IO |
ICA-10DI6DO-G60A-IO |
44A731240-G13 |
IC693ACC323 |
SUXIANTONGFEI |
IC693ACC301 |
IC690ACC905 |
IC693ACC400 |
R88M-G5K030H-OS2-Z |
R88M-G5K030H-O-Z |
R88M-G5K030H-S2-Z |
R88M-G5K030H-Z |
R88M-G5K030T-BOS2-Z |
R88M-G5K030T-BO-Z |
R88M-G5K030T-BS2-Z |
R88M-G5K030T-B-Z |
R88M-G5K030T-OS2-Z |
R88M-G5K030T-O-Z |
R88M-G5K030T-S2-Z |
R88M-G5K030T-Z |
R88M-G6K010H-BOS2-Z |
R88M-G6K010H-BO-Z |
R88M-G6K010H-BS2-Z |
R88M-G6K010H-B-Z |
R88M-G6K010H-OS2-Z |
R88M-G6K010H-O-Z |
R88M-G6K010H-S2-Z |
R88M-G6K010H-Z |
R88M-G6K010T-BOS2-Z |
R88M-G6K010T-BO-Z |
R88M-G6K010T-BS2-Z |
R88M-G6K010T-B-Z |
R88M-G6K010T-OS2-Z |
R88M-G6K010T-O-Z |
R88M-G6K010T-S2-Z |
R88M-G6K010T-Z |
R88M-G75030H-BOS2-Z |
R88M-G75030H-BO-Z |
R88M-G75030H-BS2-Z |
R88M-G75030H-B-Z |
R88M-G75030H-OS2 |
R88M-G75030H-OS2-Z |
R88M-G75030H-O-Z |
R88M-G75030H-S2-Z |
R88M-G75030H-Z |
R88M-G75030T-BOS2-Z |
R88M-G75030T-BO-Z |
R88M-G75030T-BS2-Z |
R88M-G75030T-B-Z |
R88M-G75030T-OS2-Z |
R88M-G75030T-O-Z |
R88M-G75030T-S2-Z |
R88M-G75030T-Z |
R88M-G7K515H-BOS2-Z |
R88M-G7K515H-BO-Z |
R88M-G7K515H-BS2-Z |
R88M-G7K515H-B-Z |
R88M-G7K515H-OS2-Z |
R88M-G7K515H-O-Z |
R88M-G7K515H-S2-Z |
R88M-G7K515H-Z |
R88M-G7K515T-BOS2-Z |
R88M-G7K515T-BO-Z |
R88M-G7K515T-BS2-Z |
R88M-G7K515T-B-Z |
R88M-G7K515T-OS2-Z |
R88M-G7K515T-O-Z |
R88M-G7K515T-S2-Z |