行車記錄器分析debug(NovaTek 96650) - 工程師

By Lucy
at 2022-08-15T11:15
at 2022-08-15T11:15
Table of Contents
大家好,
因找不到合適的板poll文,故在此poll文。
已看過板規,應該沒有違反。若有違反規定,敬請板主直接刪文,謝謝。
我家裡有三台Novatek 96650的行車記錄器,最近幾幾個月陸續發生同樣的問題。
都停在開機"Welcome"畫面。按reset, 或恢復原廠設定,都無法解決定問題。
問題畫面如下
https://imgur.com/FPDTRxG
正面
https://imgur.com/ckL1uWf
背面
https://imgur.com/YhPHAeq
正面放大圖
https://imgur.com/2PRmByr
問題解析
https://imgur.com/mZPg81z
A Block:
量測過左上角電池輸入測紅黑接點電壓:3.78v, 以及旁邊看起來像regulator的電壓:
3.4v。看起來輸入電源似乎沒問題
B Block: 判斷像是輸出video介面:看起來不像是問題的方向。
C Block: 主晶片是 Novatek novatek 96650B, 旁邊是Nanya DRAM, 及右上是MXIC的
nor flash (控制程式)
D Block:判斷像是輸入按鍵介面電路。
目前現象是開機後,一直會停在”Welcome”畫面。
目前方向像是 C block有問題。已知是三台都是在太陽溫度高的環境下用了大概3年。現
象是都開機停在開機畫面。
懷疑和高溫和用久了有關。但不知接下來該如何做…
謝謝。
--
因找不到合適的板poll文,故在此poll文。
已看過板規,應該沒有違反。若有違反規定,敬請板主直接刪文,謝謝。
我家裡有三台Novatek 96650的行車記錄器,最近幾幾個月陸續發生同樣的問題。
都停在開機"Welcome"畫面。按reset, 或恢復原廠設定,都無法解決定問題。
問題畫面如下
https://imgur.com/FPDTRxG
正面
https://imgur.com/ckL1uWf
背面
https://imgur.com/YhPHAeq
正面放大圖
https://imgur.com/2PRmByr
問題解析
https://imgur.com/mZPg81z
A Block:
量測過左上角電池輸入測紅黑接點電壓:3.78v, 以及旁邊看起來像regulator的電壓:
3.4v。看起來輸入電源似乎沒問題
B Block: 判斷像是輸出video介面:看起來不像是問題的方向。
C Block: 主晶片是 Novatek novatek 96650B, 旁邊是Nanya DRAM, 及右上是MXIC的
nor flash (控制程式)
D Block:判斷像是輸入按鍵介面電路。
目前現象是開機後,一直會停在”Welcome”畫面。
目前方向像是 C block有問題。已知是三台都是在太陽溫度高的環境下用了大概3年。現
象是都開機停在開機畫面。
懷疑和高溫和用久了有關。但不知接下來該如何做…
謝謝。
--
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