PDP-V402
156
4. POWER OFF CIRCUIT FOR PROTECTION
This unit is provided with various protection circuits. When
these protection circuits operate, the P.D. (Power Down) operates
to turn OFF the relay (RY3001) and turn OFF the power of the
unit. When P.D. operates, the power goes off after the LED
(D3807) emits light.
1) Power supply PD circuit
Over-voltage protection circuit (O.V.P.)
Detects the overvoltage of the power supplies B (TP3101:
215V), VSUS (TP3301: 170V), VADR (TP3401: 60V),
VCC (TP3201: 5V), VCSP (40V) and operates P.D.
Voltage drop protection circuit (U.V.P.)
Detects the voltage drop by the overload of the power
supplies VSUS (170V), VADR (60V), VCP (12V),
+13.5V, and VCC (5V) and operates P.D.
Overvoltage input protection circuit
When voltage above approximately 200V is input to the
AC power input, it operates P.D.
2) DRIVE ASSY overvoltage protection circuit
Operates P.D. when the DC-DC CONV. output (VRN, VH)
in the X DRIVE (A) ASSY, Y DRIVE (A) ASSY becomes
overvoltage.
3) DRIVE ASSY undervoltage protection circuit
Operates P.D. when the DC-DC CONV. output (VH) in the
Y DRIVE (A) ASSY becomes undervoltage.
DIGITAL VIDEO ASSY
K6101 (R)
K6004
(CKL2I)
K6005
(VD)
K6020
(HD)
R6251
D6502
D6503
R6252
K6102 (G)
K6103 (B)
TOP
4) DRIVE ASSY overcurrent protection circuit
Detects the overcurrent of the VCP (12V) supplied to the
X DRIVE (A)/(B) ASSY and Y DRIVE (A)/(B) ASSY,
and operates P.D.
Detects overcurrent flowing to R5032 (390 W, 3W) in the
Y DRIVE (A) ASSY and Y DRIVE (B) ASSY, and
operates P.D.
5) FAN stop protection circuit
Operates P.D. when the internal fan stops.
Does not operate when the external fan stops.
6) Temperature detection protection circuit
Operates P.D. when the external temperature exceeds
approximately 55 ˚C.
The STANDBY/ON indicator blinks in green only when this
detection circuit is working.
Summary of Contents for PDP-V402
Page 15: ...PDP V402 15 ...
Page 29: ...PDP V402 81 A B C D 5 6 7 8 5 6 7 8 N Y3 CN5005 G B1 CN3202 Q X3 CN4005 E SP6 ...
Page 36: ...PDP V402 96 A B C D 1 2 3 4 1 2 3 4 CONTROL ASSY B SIDE B B ...
Page 37: ...PDP V402 97 A B C D 5 6 7 8 5 6 7 8 ANP1968 C B ...
Page 44: ...PDP V402 104 A B C D 1 2 3 4 1 2 3 4 DIGITAL VIDEO ASSY D SIDE B D ...
Page 45: ...PDP V402 105 A B C D 5 6 7 8 5 6 7 8 ANP1866 D Q6105 Q6104 Q6106 Q6107 D ...
Page 48: ...PDP V402 108 A B C D 1 2 3 4 1 2 3 4 X DRIVE A ASSY E SIDE B E ...
Page 49: ...PDP V402 109 A B C D 5 6 7 8 5 6 7 8 ANP1970 B E ...
Page 52: ...PDP V402 112 A B C D 1 2 3 4 1 2 3 4 X DRIVE B ASSY F SIDE B F ...
Page 53: ...PDP V402 113 A B C D 5 6 7 8 5 6 7 8 ANP1970 B F ...
Page 56: ...PDP V402 116 A B C D 1 2 3 4 1 2 3 4 Y DRIVE A ASSY G SIDE B G ...
Page 57: ...PDP V402 117 A B C D 5 6 7 8 5 6 7 8 ANP1971 B G ...
Page 60: ...PDP V402 120 A B C D 1 2 3 4 1 2 3 4 Y DRIVE B ASSY H SIDE B H ...
Page 61: ...PDP V402 121 A B C D 5 6 7 8 5 6 7 8 ANP1971 B H ...
Page 64: ...PDP V402 124 A B C D 1 2 3 4 1 2 3 4 MAIN POWER ASSY M SIDE B M ...
Page 65: ...PDP V402 125 A B C D 5 6 7 8 5 6 7 8 ANP1864 D M ...
Page 71: ...PDP V402 131 A B C D 1 2 3 4 1 2 3 4 3D Y C ASSY Q SIDE B ANP1974 A Q ...
Page 105: ...PDP V402 165 ...
