Troubleshooting - Clarion VRX775VD Service Manual

TROUBLESHOOTING

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