[原创]SYSMEX CA510全自动血凝仪维修实例

SYSMEX CA510全自动血凝仪维修实例

CA510报错误Z Axis Down Error ，维修手册解释如下

(1) Probable Cause

1. Drive mechanism operation is obstructed.

2. Loosened pulley of motor

3. Failure of PCB No. 9264

4. Failure of PCB No. 2134

5. Defective light shield

6. Flaws on shaft

7. Failure on bushing

8. Failure of PCB No. 9260

9. Failure of wiring cord (flat cable)

10. Failure of PCB No. 6362

11. Failure of Z axis motor assembly

12. Failure of PCB No. 4086

13. The light shield attached to the catcher is mis-positioned or defective.

(2) Confirmation by the Operator

1. Remove the reaction tube.

2. Remove the obstruction in Z-axis drive mechanism.

3. Turn off the power supply and turn it on again.

(3) Confirmation by Service Engineer

1. Retighten the screw of the pulley of motor.

2. If home position cannot be detected even when the drive mechanism is operated:

a) Check whether the light shield is defective or not.

Suspect Part	Test Points		Expected Value
Position sensor	CN1 (PCB No. 9264) pin 9 (GND) and pin 7		5 V 􀃆 0 V when the sensor is shielded
CN4 (PCB No. 2134) pin 9 (GND) and pin 7		5 V 􀃆 0 V when the sensor is shielded
CN1 (PCB No. 2134) pin 17 and pin 18 (GND)		5 V 􀃆 0 V when the sensor is shielded
CN1 (PCB No. 9260) pin 17 and pin 18 (GND)		5 V 􀃆 0 V when the sensor is shielded
CN105 (PCB No. 6332) pin 7 and pin 14 (GND)		5 V 􀃆 0 V when the sensor is shielded

3. When the motor does not operate,

a) Any of motor, PCB No. 9264, PCB No. 2134, X-axis wiring cord, and PCB No. 4086 is faulty. Replace and confirm.

4. Failure of drive mechanism

a) Check for flaws on the shaft.

b) If the shaft is free from flaws, the problem is in the bushing.

按照手册检查机械部分，Z轴马达均正常PCB No. 2134，9260，6362都正常最后测量排线都通，但量到马达的驱动线时却有一根不通，（此线最粗最不应该断，一般不会考虑它）绕了很大一个圈子原来问题就出在最简单的地方，有时候完全按照维修手册操作反而更找不到原因重点所在，而且维修一定要从简到繁，由浅层到深入，否则很容易走弯路

呵呵，让我想起我曾经修过的一台VMOS麻醉气体监护仪，里面有一根和1.5平方的电源线差不多的导线，我想这么粗的家伙总不会断吧，结果最后还就是它断了。而且是在中间断的，外面包覆塑胶皮，根本看不出来。估计是电线质量不好，在中间断开了。

这样看起来优点难哦