Epson LQ-1060, Technical Manual, Page: 93 / 253

2.3.4.2 35 V Line Voltage Detection Circuit
As shown in Figure 2-42, this circuit detects voltage on the 35 V line. The detected voltage is divided
by R51 and R52, and the voltage at point is input to the terminal of the CPU.
50
/
G
P
Figure 2-42. 35 V Line Voltage Detection Circuit
in
Figure 2-43 and Table 2-26, if the +35 V line drops to +31.7 V or less during high-duty cycle printing,
the printer is protected as follows:
1. Printing is performed at normal speed.
2. If the +35 V line voltage drops to 31.7 V or less, the printing is stopped (no-load state).
3. If the voltage is higher than 31.7 V, the remainder of the printing line is printed at half-speed.
Return
35
-- —————— — —
c
31.7
c1
Limit Value
>
o
1 2 3
Process
One Line Printing
Figure 2-43. 35 V Line Protection
Table 2-26 shows the relationship between the 35 V line voltage and the input voltage at
Table 2-26. Relationship 35 V Line and Voltages
limit
2-46