{"id":1368,"date":"2019-05-01T14:33:55","date_gmt":"2019-05-01T14:33:55","guid":{"rendered":"http:\/\/localhost\/bizhubtroubleshooter\/?post_type=epkb_post_type_1&p=1368"},"modified":"2023-12-27T18:02:16","modified_gmt":"2023-12-27T18:02:16","slug":"c2551-bizhub-c658-c558-c458","status":"publish","type":"epkb_post_type_1","link":"https:\/\/apps.kmbizhubvcare.com\/bizhubtroubleshooter\/?epkb_post_type_1=c2551-bizhub-c658-c558-c458","title":{"rendered":"C2551 (bizhub C658\/C558\/C458)"},"content":{"rendered":"\n

Contents<\/h2>\n\n\n\n
Trouble type<\/td>C2551: Abnormally low toner density detected cyan TCR sensor<\/td><\/tr>
Rank<\/td>B<\/td><\/tr>
Trouble detection condition<\/td>When sampling data is determined in TC ratio calculation control, TCR sensor output is higher than a predetermined value for a predetermined number of times in a row even though there is toner in the sub hopper.<\/td><\/tr>
Trouble isolation<\/td>–<\/td><\/tr>
Relevant electrical parts<\/td>\u2022 Developing unit\/C,M,Y,K
\u2022 Toner cartridge\/C,M,Y,K
\u2022 Toner empty sensor\/Y (PS34)
\u2022 Toner empty sensor\/M (PS33)Toner empty sensor\/C (PS32)
\u2022 Toner empty sensor\/K (PS31)
\u2022 Toner cartridge motor\/Y,M (M10)
\u2022 Toner cartridge motor\/C,K (M25)
\u2022 Toner supply motor\/Y (M9)
\u2022 Toner supply motor\/M (M8)
\u2022 Toner supply motor\/C (M7)
\u2022 Toner supply motor\/K (M6)
\u2022 Expansion control board (EXCB)
\u2022 Front side board (FRB)
\u2022 MFP board (MFPB)<\/td><\/tr><\/tbody><\/table>\n\n\n\n

 Procedure<\/h2>\n\n\n\n
  1. Perform image troubleshooting procedure if image density is low.<\/li>
  2. Reinstall the developing unit.<\/li>
  3. Reinstall the toner cartridge.<\/li>
  4. Check the connector between the developing unit-FRB CN13 (C2557), CN14 (C2551), CN15 (C2553), CN16 (C2555) for proper connection and correct as necessary.<\/li>
  5. Check the connector between FRB CN1, CN3-MFPB CN4E, CN5E for proper connection and correct as necessary.<\/li>
  6. M10, M25 operation check