https://h30471.www3.hp.com/t5/da-yin-ji-shi-yong-xiang-guan-wen-ti/da-yin-ji-tu-ran-bu-neng-zi-dong-shuang-mian-da-yin-le-xing-hao-shiHP-LaserJet-Pro-MFP-M429fdw/m-p/1367808#M312611 <P>您好</P> <P>请下载并安装：</P> <P><A href="https://ftp.hp.com/pub/softlib/software13/printers/UPD/upd-pcl6-x64-7.9.0.26347.zip" target="_blank">https://ftp.hp.com/pub/softlib/software13/printers/UPD/upd-pcl6-x64-7.9.0.26347.zip</A>&nbsp;</P> <P>然后请使用新安装的驱动（设备设置--可安装选项--双面单元改为已安装）重新测试双面打印，谢谢。</P> Fri, 07 Nov 2025 07:59:19 GMT 双鱼座鲨鱼 2025-11-07T07:59:19Z https://h30471.www3.hp.com/t5/da-yin-ji-shi-yong-xiang-guan-wen-ti/da-yin-ji-tu-ran-bu-neng-zi-dong-shuang-mian-da-yin-le-xing-hao-shiHP-LaserJet-Pro-MFP-M429fdw/m-p/1367803#M312608 <P>之前可以自动双面打印，现在只能单面打印和手动双面</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="123456gggggg_0-1762500889034.png" style="width: 400px;"><img src="https://h30471.www3.hp.com/t5/image/serverpage/image-id/128661i8DD8D79882AA049D/image-size/medium?v=v2&amp;px=400" role="button" title="123456gggggg_0-1762500889034.png" alt="123456gggggg_0-1762500889034.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="123456gggggg_1-1762500904353.png" style="width: 400px;"><img src="https://h30471.www3.hp.com/t5/image/serverpage/image-id/128662i30380CC009A2D18A/image-size/medium?v=v2&amp;px=400" role="button" title="123456gggggg_1-1762500904353.png" alt="123456gggggg_1-1762500904353.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="123456gggggg_2-1762500922960.png" style="width: 400px;"><img src="https://h30471.www3.hp.com/t5/image/serverpage/image-id/128663iF138DED481EE8E1A/image-size/medium?v=v2&amp;px=400" role="button" title="123456gggggg_2-1762500922960.png" alt="123456gggggg_2-1762500922960.png" /></span></P><P>&nbsp;</P><P>&nbsp;</P> Fri, 07 Nov 2025 07:35:42 GMT https://h30471.www3.hp.com/t5/da-yin-ji-shi-yong-xiang-guan-wen-ti/da-yin-ji-tu-ran-bu-neng-zi-dong-shuang-mian-da-yin-le-xing-hao-shiHP-LaserJet-Pro-MFP-M429fdw/m-p/1367803#M312608 123456gggggg 2025-11-07T07:35:42Z https://h30471.www3.hp.com/t5/da-yin-ji-shi-yong-xiang-guan-wen-ti/da-yin-ji-tu-ran-bu-neng-zi-dong-shuang-mian-da-yin-le-xing-hao-shiHP-LaserJet-Pro-MFP-M429fdw/m-p/1367808#M312611 <P>您好</P> <P>请下载并安装：</P> <P><A href="https://ftp.hp.com/pub/softlib/software13/printers/UPD/upd-pcl6-x64-7.9.0.26347.zip" target="_blank">https://ftp.hp.com/pub/softlib/software13/printers/UPD/upd-pcl6-x64-7.9.0.26347.zip</A>&nbsp;</P> <P>然后请使用新安装的驱动（设备设置--可安装选项--双面单元改为已安装）重新测试双面打印，谢谢。</P> Fri, 07 Nov 2025 07:59:19 GMT https://h30471.www3.hp.com/t5/da-yin-ji-shi-yong-xiang-guan-wen-ti/da-yin-ji-tu-ran-bu-neng-zi-dong-shuang-mian-da-yin-le-xing-hao-shiHP-LaserJet-Pro-MFP-M429fdw/m-p/1367808#M312611 双鱼座鲨鱼 2025-11-07T07:59:19Z