杭州LED液晶屏是一種目前比較流行的播放設備，與一體機設備不同的是LED顯示屏的屏幕是由單元板構成。因此我們在進行使用的時候一定要特別注意LED顯示屏單元板的故障維修，下面就讓杭州開享智能科技為你簡單介紹下。

　　Hangzhou LED LCD screen is a popular playing device at present. Different from the all-in-one device, the screen of LED screen is composed of unit boards. Therefore, we must pay special attention to the maintenance of unit boards of LED screen when we use them

　　一、整個led顯示單元板不亮:檢查電源是否連接到信號線;檢查檢查卡是否能識別接口;如果檢查卡的紅燈亮，則無法識別;檢查燈板是否與檢查卡的電源連接，或者燈板接口處的信號和接地之間是否存在短路，這使得接口無法識別。檢查74HC245是否存在虛焊短路，以及245上相應的使能(EN)信號輸入/輸出引腳是否存在虛焊或與其他線路短路。

　　1. The whole led display unit board is not bright: check whether the power supply is connected to the signal line; Check whether the card can recognize the interface; If the red light of the inspection card is on, it cannot be recognized; Check whether the lamp board is connected to the power supply of the check card, or whether there is a short circuit between the signal at the lamp board interface and the ground, which makes the interface unrecognizable. Check 74HC245 for a virtual welding short circuit and the corresponding enable (EN) signal input/output pin on 245 for a virtual welding or short circuit with other lines.

　　二、點斜掃描時，常規隔行掃描不會使圖像堆棧閃爍:檢查245的A、B、C、D信號輸入端口之間是否存在斷路、虛焊或短路;檢查對應于245的輸出端子是短路、虛焊還是斷線。檢查信號甲、乙、丙、丁是否短路，或者信號是否對地短路。

　　2. Conventional interlaced scanning will not make the image stack blink during point-oblique scanning: check whether there is A circuit break, virtual welding or short circuit between the A, B, C and D signal input ports of 245; Check whether the output terminal corresponding to 245 is short circuit, dummy or broken. Check whether the signal a, b, c or d is short-circuited, or whether the signal is short-circuited to the ground.

　　三、一條或多條線路在完全亮時不亮:檢查138和4953之間的線路是開路、虛焊還是短路。

　　three. One or more lines are not bright when they are fully lit: check whether the lines between 138 and 4953 are open, phantom or short.

　　四、在內部行掃描時，兩行或更多行(通常是2的倍數和規則)一起點亮:檢查信號A、B、C和D之間是否存在短路;檢查4953輸出是否與其他輸出短路。

　　Four, in the internal line scan, two or more lines (usually multiples of 2 and rules) are lit together: check whether there is A short circuit between signal A, B, C and D; Check whether the 4953 output is short-circuited with other outputs.

　　五、當LED顯示屏完全點亮時，有單點或多點(不規則)沒有點亮:找出模塊對應的控制引腳是否與銀行短路;更換模塊或單個燈。

　　5. When the LED screen is fully lit, there are single or multiple points (irregular) that are not lit: find out whether the corresponding control pin of the module is short-circuited with the bank; Replace modules or individual lamps.

　　以上就是杭州開享智能科技對杭州LED液晶屏單元板在故障時的維修建議，那么本文到這里也就結束了，如果你對杭州LED液晶屏感興趣，或者想要購買相關產品?？梢躁P注我們的網站(www.saki-toku.com)，感謝你的閱讀!