https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Can-I-clean-the-clear-ink-head-for-mx7600-printer/m-p/126552#M33983 <P>Clear ink tank indicator displayed so replaced it with genuine PGI-9 clear tank per instructions and same problem plus new B300 error code. &nbsp;Figured must've been bad new tank so ordered another and same problems. &nbsp;Ran all clean and deep clean utilities and then check nozzle pattern and same error message. &nbsp;Tried using warm water to clean the two male prongs that insert into the new tank per one suggestion as possible the ink heads had dried u and not allow clear ink into head(just a guess?) and still no luck.</P><P>&nbsp;</P><P>Now reading about replacing "valve head"? Hate bring unit in for service as 3-5 years old and usually repair costs are more than just buying darn new printer which is silly as was working fine before the empty clear tank. &nbsp;Any input appreciated</P> Sun, 23 Nov 2014 14:13:21 GMT vacman 2014-11-23T14:13:21Z https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Can-I-clean-the-clear-ink-head-for-mx7600-printer/m-p/126552#M33983 <P>Clear ink tank indicator displayed so replaced it with genuine PGI-9 clear tank per instructions and same problem plus new B300 error code. &nbsp;Figured must've been bad new tank so ordered another and same problems. &nbsp;Ran all clean and deep clean utilities and then check nozzle pattern and same error message. &nbsp;Tried using warm water to clean the two male prongs that insert into the new tank per one suggestion as possible the ink heads had dried u and not allow clear ink into head(just a guess?) and still no luck.</P><P>&nbsp;</P><P>Now reading about replacing "valve head"? Hate bring unit in for service as 3-5 years old and usually repair costs are more than just buying darn new printer which is silly as was working fine before the empty clear tank. &nbsp;Any input appreciated</P> Sun, 23 Nov 2014 14:13:21 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Can-I-clean-the-clear-ink-head-for-mx7600-printer/m-p/126552#M33983 vacman 2014-11-23T14:13:21Z https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Can-I-clean-the-clear-ink-head-for-mx7600-printer/m-p/126804#M33984 <P>Hi vacman,</P><P>&nbsp;</P><P>Since you are receiving the B300 error, please turn off the printer&nbsp;and unplug the power cord from the power supply. &nbsp;After 5 minutes or more, plug the power cord of the printer&nbsp;back in, and then turn it back on. &nbsp;If the same error occurs, the printer will require servicing. &nbsp;Please call or email us at one of the methods on the <A target="_blank" href="http://www.usa.canon.com/cusa/consumer/standard_display/contact_us_consumer">Contact Us</A> page to obtain your servicing options.</P> Wed, 26 Nov 2014 08:33:43 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Can-I-clean-the-clear-ink-head-for-mx7600-printer/m-p/126804#M33984 Ramona 2014-11-26T08:33:43Z