PRO-1010HD
136
1
2
3
4
1
2
3
4
C
D
F
A
B
E
• Power-down diagnosis (defective points)
PD Circuit in
operation
Defective Assy
Reason for Power-down
Point to be Checked
Possible Defective Part
Remarks
1
NONE
2
POWER
POWER SUPPLY Unit
If the elapsed time from relay-on until the LED
in the power supply unit lights is about 2-4
seconds, the defective assembly may be the
50 (43) X or Y DRIVE.
50 (43) X DRIVE Assy
VSUS UVP
X SUS BLOCK
IC1203 - IC1207 (mask module)
50 (43) Y DRIVE Assy
VSUS UVP
Y SUS BLOCK
IC2303 - IC2307 (mask module)
3
SCAN
50 (43) SCAN A, B
Assy
or Y 50 (43) DRIVE
Assy
VH UVP
SCAN IC
SCAN IC
VH UVP
VH DC/DC
IC2401, IC2402, IC2410, L2401
Disconnection of cable detected
CN2001, CN2301
4
SCN-5V
50 (43) SCAN A, B
Assy
or 50 (43) Y DRIVE
Assy
Disconnection of cable detected
CN2101, CN2102
IC5V UVP
SCAN IC, IC5V DC/DC Y SUS
BLOCK
SCAN IC, Q2401, Q2402, IC2304, IC2309
IC5V OVP
IC5V DC/DC
IC2403, IC2411
5
Y-DRIVE
50 (43) Y DRIVE Assy
+16.5V OCP
Y SUS BLOCK
IC2303 - IC2307 (mask module), IC2301,
IC2304, R2309
6
Y-DCDC
50 (43) Y DRIVE Assy
VOFS UVP
VOFS DC/DC
IC2404, IC2412, Q2404, Q2407
VOFS OVP
VOFS DC/DC
IC2404, IC2412
VH OVP
VH DC/DC
IC2402, IC2410
7
Y-SUS
50 (43) Y DRIVE Assy
Power-down caused by detection of
middle-point voltage
Y RESONANCE BLOCK
Q2202, Q2214, Q2205, Q2206, Q2208,
Q2209, Q2211, Q2212, IC2201, IC2202,
Control signal series resistors
DIGITAL VIDEO Assy
Power-down caused by detection of
middle-point voltage
DIGITAL VIDEO Assy
IC5401, Control signal series resistors
8
ADRS
50 (43) ADDRESS
Assy
Disconnection of cable detected
CN1501
Power-down caused by detection of a
power surge
ADR RESONANCE BLOCK
R1631, Q1601, D1602
Power-down caused by detection of
middle-point voltage
ADR RESONANCE BLOCK
Q1602, C1609, D1606, D1607
9
X-DRIVE
50 (43) X DRIVE Assy
Disconnection of cable detected
CN1001, CN1201
+16.5V OCP
X SUS BLOCK
IC1203, IC1207 (mask module),
IC1204, IC1206, R1230
VRN OCP
X SUS BLOCK
Q1205, R1226, R1251
10
X-DCDC
50 (43) X DRIVE Assy
VRN OVP
VRN DC/DC
IC1403, IC1404
VRN UVP
VRN DC/DC
IC1402, IC1403, IC1404
X SUS BLOCK
Q1205, R1226, R1251
11
X-SUS
50 (43) X DRIVE Assy
Power-down caused by detection of
middle-point voltage
X RESONANCE BLOCK
Q1102, Q1103, Q1105, Q1106, Q1108,
Q1109, Q1111, Q1112, IC1101, IC1102,
Control signal series resistors
DIGITAL VIDEO Assy
Power-down caused by detection of
middle-point voltage
DIGITAL VIDEO Assy
IC5401, Control signal series resistors
12
DIG-DCDC
DIGITAL VIDEO Assy
DCDC +3.3V, +1.5V OVP
DC DC CONVERTER BLOCK
U5601 (DC DC CONVERTER Module)
OVP
:
O
ver
V
oltage
P
rotection
UVP
:
U
nder
V
oltage
P
rotection
OCP
:
O
ver
C
urrent
P
rotection
Note:
50 (43) *** Assy means 50 *** Assy or 43 *** Assy.