Epson LX-810 - Page 150

REV.-A
Table 5-4. TAMA Board Unit Repair (Continued)
Problem Symptom
Cause
Check point
Solution
rhe Carriage The Carriage IC 3B or IC
At IC 1A, check the input signal at pin 5
Replace 3B
)perates does not op- IA is and the output waveform at pin 1 or 1A.
]bnormally.
crate at all defective.
Pin 1
Pin 5
+
I
50 v 5V
+
21r s
Carriage op- The refer- Check transistor Q 17, Q18 and Q19.
Replace
eration is
un- ence Volt- Q17, Q18 or
stable (lack age
generat- Q19.
of torque) ing circuit is
faulty.
5-15