因為我的使用不當，燒掉了電路版上的一個零件。
想麻煩大家若手邊有TomTom ONE，是否可以幫我看一下，
在電路版上插頭旁邊有一顆黑黑小小的晶片(或二極體)電路版上標示D5
是否有人可以幫我看一下那顆是什麼嗎，還能買得到嗎?
只是想盡力修好它，希望能有熱心的大大幫忙，
謝謝..
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內容:TomTom One uses a Linear Technologies chip LTC3455 as a USB/charger power controller. See http://cds.linear.com/docs/Datasheet/3455fc.pdf. This chip is susceptible to high transient voltages that result from resonances created by parasitic inductances and capacitances of the USB/in-car charger cable . Good designs using this chip suggest that a 1 ohm resistance be put in the path of the cable to reduce the Q of the resonance and hence transient voltages. A 6V Zener diode D5 also serves to protect the chip from these transients.
If the Zener diode is blown it is most likely the the LTC3455 chip is gone as well. You can replace the chip which costs £5.00 (located in the shielded portion of the PCB). The recommended Zener Diodes for this chip are either the EDZ5.6B or EDZ6.2B manufactured by ROHM (http://www.rohm.com/products/databook/di/pdf/edz5.6b.pdf or http://www.rohm.com/products/databook/di/pdf/edz6.2b.pdf). These can be used to replace D5. The STMicroeletronics SM2T6V8A can also be used to replace D5 (http://www.st.com/stonline/products/literature/ds/8694/sm2t.pdf). All the Zeners cost a modest £0.22. I hope this is helpful
但看不懂...有英文比較厲害的大大可以幫忙翻一下嗎?
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they are all about 3mmx3mm. and may be covered by screening cans.
LTC3411 (marked LTQT) (dc-dc converter)
LTC1733 (marked LTLX) (battery charger)
SP62000 (marked AIH ) (dc-dc converter)
The first 2 are made by linear technology and the last one by Texas Instruments.
these are TINY and need a steady hand to change......
插上電源有亮綠灯,但無法開機的情況,上面是找到可能損壞的零件
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有看沒有懂 還是不知道何時會發生這種情況 XD
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