II- 8
2.3 MAIN
PCB
Fig. 2.3-1 shows the block diagram of the main PCB. The main PCB consists of the following
components.
(1) CPU (Including ROM and RAM)
(2) EEPROM (4Kbit)
(3) Power supply ON/OFF circuit, Feed button ON/OFF circuit, Cut button ON/OFF circuit, LED
ON/OFF circuit
(4) Head power supply ON/OFF circuit
(5) Full cutter motor driver circuit and Media feed motor driver circuit
(6) Media type detect sensor circuit, Media position detect sensor circuit and Cover open sensor
circuit
(7) Head temperature detect circuit
(8) Cutter home position detect sensor circuit
(9) Reset circuit
(10) USB interface circuit
Fig. 2.3-1 Block Diagram of Main PCB
Summary of Contents for QL 570 - P-Touch B/W Direct Thermal Printer
Page 1: ...P touch SERVICE MANUAL MODEL QL 570 ...
Page 29: ...III 4 Grease to be used Silicon grease G501 rice grain sized Platen gear Double gear C ...
Page 84: ...IV 6 4 5 TROUBLESHOOTING FLOWS 1 Printing is performed with specific dots omitted ...
Page 85: ...IV 7 2 The tape is not detected correctly ...
Page 86: ...IV 8 3 LED does not turn on ...
Page 87: ...IV 9 4 No printing is performed 5 The interface malfunction ...
Page 88: ...IV 10 6 The tape is not cut ...
Page 89: ...IV 11 7 The tape is not fed correctly ...
Page 122: ...Sep 2007 SM PT002 3 ...