Specifications

Appends: B
Adjustments
The adjustments for the LQ-570+/1070+ are the same as those for the LQ-570/1070,
with the exception of the circuit adjustment described in Section 4.3. This
adjustment is not applicable to U.S. dealers, because the variable resistor is set
correctly for the main board in the factory and does not need to be changed. The LQ-
570+/1070+ circuit adjustment is described below only for Epson dealers outside the
U.S., who may require this information.
Circuit Adjustment
The Cl07 MAIN board contains variable resistor VRl, which is used for balancing
the circuitry. When any of the following components are replaced, the circuitry must
be balanced by adjusting VRl.
R6, R7, TL431 (ICl), and VRl
If the circuitry is not properly adjusted, the CPU A/D converter functions
abnormally and causes irregular printer operation.
To adjust the circuit, attach a digital multimeter to check terminal TPl (Vref
voltage) on the Cl07 MAIN board. Turn on the printer and adjust variable resistor
VRl until you obtain a reading of 4.741 V.
Epson LQ-570+/1 070+
B-19