Adf Motor - Panasonic UF-5500 Service Manual

11.2.13.2. ADF Motor

ADF MOTOR
Check winding resistance of
ADF MOTOR, Approx. 15Ω ?
Yes
Are the resistance between 24V
and Pin 4,6,7,and 9 of IC700
more than 1KΩ ?
Yes
Are excitation voltage output
from Pin 4,6,7 and 9 of IC700 ?
Is Pin 22 of IC700
more than 0.4V ?
Yes
Is pin 20 of IC700 "H"?
Yes
Are phase signals input to Pin
1,12,13,14,23 and 24 of IC700 ?
Yes
Replace IC700
No
Replace ADF MOTOR
No
Replace IC700
Yes
Replace ADF MOTOR
No
No
Is Drain voltage of
Q521 0.6V or pulse ?
Is Gate voltage of Q521
0V or pulse ?
Check soldering of
Q521. OK?
No
Is voltage R711
(IC300 side) "H"?
Check soldering of
R711, R701, R702 and
Q700, OK ?
No
Replace IC300
Yes
Check soldering of R533,
R534, R540 and C509.
No
No
Check soldering of
R538 and R539. OK?
Yes
Yes
Replace Q521
No
Repair
No
Replace IC300
Yes
Yes
Replace R711, R701,
No
Repair
175
No
Yes
Replace IC300
R702 or Q700.
UF-5500 / 4500
Repair