ABB 3HAC021333-005 cpu
用萬能表檢測電路板
1.離線檢測
測出IC芯片各引腳對地之間的正,反電阻值.以此與好的IC芯片
進(jìn)行比較,從而找到故障點(diǎn).
2.在線檢測
1)直流電阻的檢測法
同離線檢測.但要注意:
(a)要斷開待測電路板上的電源;
(b)萬能表內(nèi)部電壓不得大于6V;
(c)測量時(shí),要注意外圍的影響.如與IC芯片相連的電位器等.
2)直流工作電壓的測量法
測得IC芯片各腳直流電壓與正常值相比即可.但也要注意：
(a)萬能表要有足夠大的內(nèi)阻,數(shù)字表為;
(b)各電位器旋到中間位置;
(c)表筆或探頭要采取防滑措施,可用自行車氣門芯套在筆頭上,
并應(yīng)長出筆尖約5mm;
ABB 3HAC021333-005 cpu
| 3HAC021448-003 | 3HAC023625-001 |
| 3HAC021448-005 | 3HAC023634-001 |
| 3HAC021464-004 | 3HAC023634-005 |
| 3HAC021474-001 | 3HAC023637-001 |
| 3HAC021475-001 | 3HAC023637-003 |
| 3HAC021480-001 | 3HAC023637-004 |
| 3HAC021485-001 | 3HAC023637-005 |
| 3HAC021488-001 | 3HAC023637-007 |
| 3HAC021488-002 | 3HAC023651-001 |
| 3HAC021488-003 | 3HAC023651-005 |
| 3HAC021488-004 | 3HAC023651-006 |
| 3HAC021488-005 | 3HAC023651-007 |
| 3HAC021501-001 | 3HAC023659-003 |
| 3HAC021505-002 | 3HAC023660-003 |
| 3HAC021513-001 | 3HAC023678-001 |
| 3HAC021514-001 | 3HAC023679-001 |
| 3HAC021515-001 | 3HAC023680-001 |
| 3HAC021517-001 | 3HAC023681-001 |
| 3HAC021518-001 | 3HAC023682-001 |
| 3HAC021519-001 | 3HAC023683-001 |
| 3HAC021525-001 | 3HAC023684-001 |
| 3HAC021539-001 | 3HAC023685-001 |
| 3HAC021541-002 | 3HAC023686-001 |
| 3HAC021541-003 | 3HAC023687-001 |
| 3HAC021563-001 | 3HAC023701-001 |
| 3HAC021563-012 | 3HAC023701-002 |
| 3HAC021567-001 | 3HAC023702-001 |
| 3HAC021570-005 | 3HAC023702-002 |
| 3HAC021570-006 | 3HAC023704-001 |
| 3HAC021570-007 | 3HAC023714-001 |
| 3HAC021580-001 | 3HAC023715-001 |
| 3HAC021587-001 | 3HAC023717-001 |
| 3HAC021588-001 | 3HAC023718-001 |
| 3HAC021590-001 | 3HAC023744-003 |
| 3HAC021591-005 | 3HAC023745-003 |
| 3HAC021591-006 | 3HAC023748-003 |
| 3HAC021591-007 | 3HAC023750-001 |
| 3HAC021592-001 | 3HAC023775-001 |
| 3HAC021593-001 | 3HAC023775-002 |
| 3HAC021594-001 | 3HAC023775-003 |
| 3HAC021594-003 | 3HAC023775-004 |
| 3HAC021600-001 | 3HAC023775-005 |
| 3HAC021601-001 | 3HAC023775-006 |
| 3HAC021602-001 | 3HAC023775-007 |
| 3HAC021606-001 | 3HAC023775-012 |
| 3HAC021608-001 | 3HAC023776-001 |
ABB 3HAC021333-005 cpu
| A06B-0126-B077 |
| A06B-0126-B177 |
| A06B-0126-B577 |
| A06B-0126-B677 |
| A06B-0127-B075 |
| A06B-0127-B575 |
| A06B-0127-B577 |
| A06B-0127-B677 |
| A06B-0128-B175 |
| A06B-0128-B177 |
| A06B-0128-B575 |
| A06B-0128-B675 |
| A06B-0128-B677 |
| A06B-0128-B688 |
| A06B-0141-B075 |
| A06B-0141-B077 |
| A06B-0141-B175 |
| A06B-0142-B076 |
| A06B-0143-B075 |
| A06B-0143-B175 |
| A06B-0147-B075 |
| A06B-0147-B077 |
| A06B-0147-B084 |
| A06B-0148-B075 |
| A06B-0148-B175 |
| A06B-0148-B177 |
| A06B-0151-B075 |
| A06B-0151-B077 |
| A06B-0152-B075 |
| A06B-0152-B175 |
| A06B-0153-B075 |
| A06B-0153-B077 |
| A06B-0153-B175 |
| A06B-0153-B676 |
| A06B-0157-B076 |
| A06B-0157-B077 |
| A06B-0158-B075 |
| A06B-0158-B175 |
| A06B-0158-B177 |
| A06B-0162-B075 |
| A06B-0163-B175 |
| A06B-0169-B176 |
| A06B-0172-B577 |
| A06B-0176-B077 |
| A06B-0177-B075 |
| A06B-0183-B777 |
| A06B-0185-B077 |
| A06B-0205-B000 |
| A06B-0205-B400 |
| A06B-0215-B605 |
| A06B-0216-B100 |
| A06B-0216-B200 |
| A06B-0225-B200 |
| A06B-0226-B200 |
| A06B-0227-B200 |
| A06B-0239-B200 |
| A06B-0243-B605 |
| A06B-0247-B200 |
ABB 3HAC021333-005 cpu
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