{"id":15167,"date":"2019-10-01T19:11:46","date_gmt":"2019-10-01T19:11:46","guid":{"rendered":"http:\/\/localhost\/bizhubtroubleshooter\/?post_type=epkb_post_type_1&p=15167"},"modified":"2023-12-18T19:21:47","modified_gmt":"2023-12-18T19:21:47","slug":"c2551-bizhub-c754-c654","status":"publish","type":"epkb_post_type_1","link":"https:\/\/apps.kmbizhubvcare.com\/bizhubtroubleshooter\/?epkb_post_type_1=c2551-bizhub-c754-c654","title":{"rendered":"C2551 (bizhub C754\/C654)"},"content":{"rendered":"\n

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.<\/strong>
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\n\nContents<\/p>\n\n\n\n
Trouble type<\/td>-Abnormally low toner density detected cyan TCR sensor
<\/td><\/tr>
Trouble code<\/td>C2551<\/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>-Imaging unit \/C
-Imaging unit \/M
-Imaging unit \/Y
-Toner cartridge \/C
-Toner cartridge \/M
-Toner cartridge \/Y
-Toner empty sensor\/C (RS\/C)
-Toner empty sensor\/M (RS\/M)
-Toner empty sensor\/Y (RS\/Y)
-Toner supply motor\/Y (M9)
-Toner supply motor\/M (M10)
-Toner supply motor\/C (M11)
-Toner cartridge motor \/YM (M13)
-Toner cartridge motor \/CK (M14)
-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 imaging unit.<\/a><\/td>–<\/td>–<\/td><\/tr>
3<\/td>Reinstall toner cartridge.<\/a><\/td>–<\/td>–<\/td><\/tr>
4<\/td>Check the motor connector for proper connection and correct as necessary.<\/td>–<\/td>–<\/td><\/tr>
5<\/td>Check the connector of M9, M10, M11, M13, M14 for proper drive coupling and correct as necessary.<\/td>–<\/td>–<\/td><\/tr>
6<\/td>M9, M10, M11 operation check(At this time, IU must be non-installation.)<\/td>M9: PRCB CN3-1 to 4M10: PRCB CN3-5 to 8M11: PRCB CN3-9 to 12<\/td>23 to 24-C<\/td><\/tr>
7<\/td>M13, M14 operation check<\/td>M13: PRCB CN4-1 to 4M14: PRCB CN4-5 to 8<\/td>3-K<\/td><\/tr>
8<\/td>Replace M9 (Part# A00JM12100), M10 (Part# A00JM12100, M11 (Part# A00JM12100), M13 (Part# 9314130021), M14 (Part# 9314130021)<\/td>–<\/td>–<\/td><\/tr>
9<\/td>If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them.<\/td>–<\/td>–<\/td><\/tr>
10<\/td>Replace imaging unit.<\/a> (C Part# A2X20KD, M Part# A2X20ED, Y Part# A2X208D)<\/td>–<\/td>–<\/td><\/tr>
11<\/td>PRCB ICP23 or ICP24 conduction check<\/td>–<\/td>–<\/td><\/tr>
12<\/td>Replace PRCB.<\/a> (Part# A2X0H00102)<\/td>–<\/td>–<\/td><\/tr><\/tbody><\/table>\n\n\n\n