FAQs & Troubleshooting FAQ Search Results TJ-4020TN Not your product? Search by FAQ ID number Search Back to FAQs & Troubleshooting. 2 Results 1.faqp00100452_001 How to update the firmware 2.faqp00100452_000 How to update firmware to all printers on the same subnet at the same time FAQs & Troubleshooting