Service manual

SERVICE MANUAL MASTER FILE
ENGLISH
Rev. A (1997/05/07)
3-2
Table 3-2. Printhead Solenoid Resistance
Part Test Pin
Number
(See the figure
berlow.)
Test Method
(Set Meter to Ohms. Disconnect
Motor from Main Board and check it
with Printer Power off.)
Specifications
Printhead
Common pin C1 :
Test pin 1, 4
For example, place one lead on pin C1
and the other lead on Test pin 1 to check
#1 pin Printhead solenoid. The test pin
number is just match with the printhead
solenoid (dot wire) number.
8.19
±
0.8
Ω
(at 25
°
C)
Common pin C2 :
Test pin 8
Common pin C3 :
Test pin 2, 6
Common pin C4 :
Test pin 5, 9
Common pin C5 :
Test pin 3, 7
A
2
C1
6
C2
C3
4
8
9
C4
7
C5
5
1
3
T
T
View A
Printhead
Printhead Connenctor
Printhead Connenctor
Figure 3-2. Printhead Connector Pin Alignment
Table 3-3. Printhead Driver Test Pint
Transistor Numbers Test Method
(Set meter to diodes. Check
power off.)
Meter Reading
Q2, Q3, Q4, Q5, Q6,Q7, Q8,
Q9, Q10
Check from base to collector,
and check from base to
emitter. Reverse leads and test
again.
Not open and not shorted from
base to collector, base to
emitter.
Q11,Q12, Q13, Q14, Q15,
Q16, Q17, Q18, Q19, Q20