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8. Level 3 Repair
8-4-12. HRM sensor
HRM Sensor does not work
Yes
Yes
END
Check the voltage
C4048, C4022 =3.3V
(Sensor’s LED voltage)
No
Replace U7002
Check the voltage
C4039, C4040 =1.8V
(Sensor’s VDD voltage)
Yes
No
Replace U7002
Check R5097, R5098
(I2C is OK?)
No
Yes
Replace U4011
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