{"id":9378,"date":"2019-07-02T16:06:08","date_gmt":"2019-07-02T16:06:08","guid":{"rendered":"http:\/\/localhost\/bizhubtroubleshooter\/?post_type=epkb_post_type_1&p=9378"},"modified":"2023-12-21T15:30:28","modified_gmt":"2023-12-21T15:30:28","slug":"c2557-bizhub-364e-284e-224e","status":"publish","type":"epkb_post_type_1","link":"https:\/\/apps.kmbizhubvcare.com\/bizhubtroubleshooter\/?epkb_post_type_1=c2557-bizhub-364e-284e-224e","title":{"rendered":"C2557 – (bizhub 364e\/284e\/224e)"},"content":{"rendered":"\n

\n\nContents<\/p>\n\n\n\n
Trouble type<\/td>Abnormally low toner density detected black TCR sensor<\/td><\/tr>
Trouble code<\/td>C2557<\/td><\/tr>
Rank<\/td>B<\/td><\/tr>
Detection timing<\/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
\u2022 Toner cartridge
\u2022 Toner empty switch\/K (PS31)
\u2022 Toner bottle motor (M10)
\u2022 Toner supply motor\/K (M6)
\u2022 Front side board (FRB)
\u2022 Printer control board (PRCB)<\/td><\/tr><\/tbody><\/table>\n\n\n\n

 (2)Procedure<\/p>\n\n\n\n
Step<\/td>Action<\/td>Control signal<\/td>Location of electrical components<\/td><\/tr><\/thead>
1<\/td>Perform image troubleshooting procedure if image density is low.<\/td>–<\/td>–<\/td><\/tr>
2<\/td>Reinstall developing unit<\/td>–<\/td>–<\/td><\/tr>
3<\/td>Reinstall toner cartridge<\/td>–<\/td>–<\/td><\/tr>
4<\/td>Check the connector between developing unit-FRB CN13 for proper connection and correct as necessary.<\/td>–<\/td>–<\/td><\/tr>
5<\/td>Check the connector between FRB CN1, CN3-PRCB CN7, CN9 for proper connection and correct as necessary.<\/td>–<\/td>–<\/td><\/tr>
6<\/td>M10 operation check<\/td>PRCB CN14-1 to 4<\/td>19-C<\/td><\/tr>
7<\/td>M6 operation check<\/td>PRCB CN14-5 to 8<\/td>19-C<\/td><\/tr>
8<\/td>If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them.<\/td>–<\/td>–<\/td><\/tr>
9<\/td>Replace the developing unit<\/a> (Part# A2XN03D)<\/td>–<\/td>–<\/td><\/tr>
10<\/td>Replace FRB<\/a> (Part# A61FH00500)<\/td>–<\/td>–<\/td><\/tr>
11<\/td>Replace PRCB<\/a> (Part# A61FH00101)<\/td>–<\/td>–<\/td><\/tr><\/tbody><\/table>\n\n\n\n