Technical Bulletin  PAGE: 1/2 
Reissued: 04-Oct-16 
Model: GR-C1, GR-C1_8.5inch 
 
RTB Reissue 
The items in bold italics were corrected or added. 
Subject: Firmware Release Note: Engine 
From: 2nd Tech Service Sect., MFP/Printer Tech Service Dept. 
 Mechanical 
 Paper path 
 Product Safety  
 Electrical 
 Transmit/receive 
 Other (Firmware) 
 Service manual revision 
 Retrofit information 
 Tier 2 
 
This RTB has been issued to announce the firmware release information for the Engine.
 
 
Note: Definition of Availability of RFU via @Remote 
“Available”: The firmware can be updated via RFU or SD card.  
“Not available”: The firmware can only be updated via SD card. 
 
Modified Points or Symptom Corrected 
-  Jam occurs, if the platen cover or the DF top cover 
is
 opened/closed 
while the paper feed solenoid is active. 
Symptom Corrected: 
The following symptoms announced in RTB RD117060 were fixed. 
-  Toner spills out from the joint between the ITB unit and waste toner bottle, 
and/or waste toner drops on to the rear side of the front cover. 
-  In rare cases, the ITB cleaning unit breaks. 
Toner dropping occurs in high temp/humidity environment, if the machine that 
had been left unused for an extended period. 
This firmware version was found with a defect and has been removed from the 
firmware download site. Do not use v1.53.02. (For details, please refer to 
RD117060.) 
Setting originals on the ADF may cause a jam, if the machine is receiving a fax 
during energy saver mode.