Image Transfer 
SM 4-23 M018/M019 
Replacement 
& 
Adjustment 
4.6.6  TM (TONER MARK) SENSOR BASE 
1.  Open the top cover. 
2.  Remove all AIO cartridges ( p.4-12). 
3.  Slide the ITB unit to the front side or remove it. 
4.  Rear cover ( p.4-5) 
5.  Controller box cover ( p.4-43 "Controller Board") 
6.  Controller bracket ( p.4-45 "EGB (Engine Board)") 
 
7.  Disconnect CN306 on the EGB (
 x 1). 
 
8.  Harness cover [A] (hook) 
9.  TM sensor base [B] 
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