VRX775VD
VRX776VD
- 10 -
TROUBLESHOOTING
No Power
Voltage check
emitter of Q612
14V
OK
OK
NG
Voltage check
collector of Q612
4V
Confirm to
IC501,
writing software
Check extension lead
into fuse(15A),
connector
Check
4V stabillation circuit,
(Q612, R622, IC603)
NG
Check
the oscillation of
X501
OK
OK
Voltage check
collector of Q504
9V
NG
OK
Check
RESET normally
Check
B/U DET normally
OK
Confirm to
X501, IC501
NG
Malfuntion of
RESET circuit line,
(S1102, J1101, flat wire,
J501, IC505, IC501)
Malfuntion of
B/U DET circuit line,
(IC503, IC501,R555,
R556)
NG
NG
Malfuntion of
B/U9V-DET2 circuit line,
(IC504, Q504, IC501)
Malfuntion of
ACC DET circuit
( IC504, Q505, Q506
ICIC501)
NG
OK
Check
ACC DET circuit line
Check
signal line
DCP circuit
OK
OK
Check
the oscillation of
X502
NG
Malfuntion of
DCP circuit,
(S1101, J1101, flat wire,
J501, IC501)
Defective of X502, IC501
NG
No operating the key
Check
contact of
the switch
OK
OK
NG
Confirm
KI0-3, KO0-2 line of
J501
Malfuntion of switch
Malfuntion of flat wire,
J501
NG
Defective IC501
No Power
No operating Slide Mechanisum
Confirm
Irregularity operating
OK
OK
NG
Confirm
the horizontally position
Defective of
IC501, IC502 (Sub PWB)
IC501 (Main PWB)
Confirm
lack and bite of a gear .
calibration of
horizontally position
NG
OK
Voltage check
MOTOR10V line
NG Defective of Q603,
Q604,IC501, IC602
Slide Mechanisum section