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DJM-900NXS
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A
B
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5.5 ABOUT THE PROTECTOR
POWER SUPPLY ASSY
This unit monitors the voltages of the main power-supply ICs, using the voltage-monitoring circuit. As the ICPs (IC protectors)
are also used, some circuits cannot be monitored by the voltage-monitoring circuit when any wire for an ICP is broken.
(Circuits with thick frames in the figure below)
When any of the circuit blocks indicated in thick frames (located after the ICPs) in the figure below is in failure, also check for
a broken wire for the ICP.
1. Unplug the AC power cord.
2. Check for any error, such as short-circuiting or defective parts, in the circuits subsequent to the ICP.
3. Repair the detective part.
4. Replace the ICP.
I
N
PUT ASSY
MAI
N
ASSY
ICP
V
oltage monitoring
OUTPUT RELAY
I
N
PUT RELAY
5
V
DC/DC converter
3.3
V
DC/DC converter
1.2
V
DC/DC converter
34
V
DC/DC converter
HP CIRCUIT *1
OUTPUT CIRCUIT *3
I
N
PUT CIRCUIT *6
ICP
HP CIRCUIT *2
V
+15A
V
-15A
V
+12D
non CIRCUIT
SE
N
D ASSY
SE
N
D CIRCUIT *5
ICP
ICP
ICP
P1204: DEK1103
P1210: DEK1095
P1207: DEK1121
P1209: DEK1096
P1208: DEK1121
Locations of the ICPs
Names of the Power-Supply ICs
Diagnostic procedures when the wire for an ICP is broken
OUTPUT CIRCUIT *4
Before the ICP *1
After the ICP (P1210)
After the ICP (P1207)
OUTPUT BLOCK *3&5
INPUT BLOCK *6
MAIN
MAIN
SEND
MAIN
INPUT
V
+15A_1
V
+15A
V
-15A
V
+15A_O
V
+15A_SE
V
+15A_I
N
V
+15A_I
N
V
+15A_HP
V
+15A_SE
V
+15A_HP_1
V
+15A_SE_1
V
+15A_BO
V
+15A_M2
V
+5A_REC
V
+15A_M1
V
+15A_M1_ICP
Before the ICP *2
After the ICP (P1209)
After the ICP (P1208)
OUTPUT BLOCK *4&5
INPUT BLOCK *6
MAIN
MAIN
SEND
MAIN
INPUT
V
-15A_1
V
-15A_O
V
-15A_SE
V
-15A_I
N
V
-15A_I
N
V
-15A_HP
V
-15A_SE
V
-15A_HP_1
V
-15A_SE_1
V
-15A_BO
V
-15A_M2
V
-5A_REC
V
-15A_M1
V
-15A_M1_ICP
Summary of Contents for DJM-900NXS
Page 10: ...10 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 2 2 PANEL FACILITIES ...
Page 11: ...11 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Page 12: ...12 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 ...
Page 15: ...15 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Page 20: ...20 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 4 3 DSP BLOCK DIAGRAM ...
Page 21: ...21 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Page 87: ...87 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Page 189: ...189 DJM 900NXS 5 6 7 8 5 6 7 8 A B C D E F ...
Page 192: ...192 DJM 900NXS 1 2 3 4 A B C D E F 1 2 3 4 A SIDE B A INPUT ASSY CN4003 CN4002 CN5001 CN5401 ...