Oki Microline 520 Service Handbook page 262

4.9 RESISTANCE CHECKS
4.9.01 General Description
The charts on the following pages provide information needed to determine if the printhead and
motors used in the printer are defective.
NOTE:
The printhead coil resistance values ARE NOT LISTED.
The individual printwire control lines CANNOT be accessed on this printhead.
Failure Analysis 4 - 54 Microline 520/521 Service Handbook
P/N 59257803