Epson LQ 300 - Page 86

Troubleshooting
LQ-300 Service Manual
Head Pin No.
~ Printhead
A
311 219 7 C C C 22151823 10 14 6
Head Pin No.
5 1 13 921 17 C C C 2416 12 8 20 4
T
T
View A
C: COMMON
Figure 5-2. Printhead Connector Pin Alignment
Table 5-2. Motor Driver Test Points
I
T~::sis;:r
I
Test Method
(Set Meter to Diodes. Check wfth Power Off.)
I
Meter Reading
PF Motor Driver
(Q2, Q3, Q4, Q5
Cheek from base to ooliector and from base to
The reading should be
emitter.
neither open nor shorted
Reverse leads and test again.
from base to collector or
(Emitter and base are marked on the main board
base to emitter.
assembly.)
5-2
Rev.A