Measure the tachometer resistance.
|
(1) |
COS− |
|
(2) |
COS+ |
|
(3) |
SIN− |
|
(4) |
SIN+ |
|
Terminals |
Specified resistance |
|
SIN+ and SIN− terminal |
200±8 Ω |
|
COS+ and COS− terminal |
200±8 Ω |
If defective, replace the tachometer.
If OK, replace the combination meter printed circuit.