Initialization - OKIDATA Pacemark 3410 Service Manual

Page: 16
Service Guide PM3410
Chapter 2 Principles of Operation

2.1.03 Initialization

The printer is initialized whenever it is powered ON or when the I-PRIME signal is received from the host
at the parallel interface.
The initialization process is performed as listed below.
1. The reset circuit sends the RST-P signal to the MPU and LSIs.
2. ROM program execution starts with the mode setting of Q2 and Q5.
3. ROM and RAM are checked for errors.
4. RAM is initialized.
5. Bail and carriage homing is performed.
6. The interface signals (output level of ACK, BUSY, etc.) are set.
7. The SELECT lamp is turned ON.
8. The printer signals the host computer that it is ready to receive data.
Block Diagram