Epson LX-810 Technical Manual page 148

Problem Symptom
The CPU is
not
Table 5-4. TAMA Board Unit Repair (Continued)
Cause
Check the Voltage Waveforms at the
+ 24V and for the RESET signal.
Check pin 54 of IC 2C for a changing
signal HIGH/LOW.
s abnormal.
Check point
5 - 1 3
REV.-A
Solution
C3C.
C3D.