996500033880 SDI PSU (LJ44-00101C) repair tips
May 21, 2009
SDI PSU (LJ44-00101C)
2
SDI PSU (LJ44-00101C)
•This document describes how to activate error codes in stand alone mode and what to check based on the errors observed.
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Difference between Rev 0.65 and Rev 0.7
7 types of errors could be detected by Alarm
board
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Difference between Rev 0.65 and Rev 0.7
Two extra errors detected by Alarm board
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Preparation
May 21, 2009
Jigs required to activate error codes
Jig 1 is connected to socket CN1M03
Pin 7 and pin 4 are connected to the switch as shown below:
Jig 1
7
Function of jig 1
-When this switch is turned on, relay should give click sound
-LED8001 and LED8002 should turn ON
CN1M03
LEDs
8
Jigs required to activate error codes
Jig 2 is connected to socket CN8006 to short circuit Vs_On (pin 9) and D3V3 (pin 2) together.
Jig 2
9
Function of jig 2
- When jig 1 and jig 2 are switched on, alarm board can be activated to generate error codes via LED BD8903 on alarm board.
CN8006
10
Jigs required to activate error codes
Jig 3 is connected on alram board to short circuit two pins located on right hand side
BJ8902 : Vs_ON ENABLE
Jig 3
11
Function of jig 3
- When jig 1 and jig 2 and jig 3 are switched on, LED on alarm board would generate error code if PSU is faulty
LED
BJ8902 : Vs_ON ENABLE
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What is next?
•Remove all the plugs from PSU
•Insert the three jigs which you made
•Apply power
•Look for LED on alarm board
•If LED is blinking, count the number of blinks and see relevant repair tip
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Error codes
Error detection condition |
No. of times LED blinking |
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VA OVP, UVP |
1 |
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12V OVP, UVP |
2 |
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VSCAN OVP, UVP |
3 |
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D3V3 OVP, UVP |
4 |
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VS OVP, UVP |
5 |
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Vg OVP, UVP |
6 |
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VSET OVP, UVP |
7 |
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VE OVP, UVP |
8 |
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Over Temperature |
9 |
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PFC_OK UVP |
10 |
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5V2 OVP or Active DC_PROT |
11 |
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Time Over |
12 |
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D5VL OVP, UVP |
13 |
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OVP: Over Voltage Protection
UVP: Under Voltage Protection
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Protection Circuit Specification
|
HIC8001 |
Low |
High |
Normal level |
Output |
Output |
Normal |
Error |
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PIN |
level |
level |
UVP |
OVP |
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Normal High (5.2V ± |
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Relay |
14 |
Below 1.56V |
Above 3.64V |
0.1V) |
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Active Low (Below 0.9V) |
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Normal High (5.2V ± |
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PFC_OK |
15 |
Below 1.56V |
Above 3.64V |
0.1V) |
330V |
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380V |
10 |
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Active Low (Below 0.3V) |
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D5V |
9 |
Below 1.68V |
Above 3.36V |
2.49V |
3.5V |
7.0V |
5.2V |
13 |
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D3V3 |
7 |
Below 1.91V |
Above 3.45V |
2.53V |
2.5V |
4.5V |
3.3V |
4 |
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Vg |
8 |
Below 1.66V |
Above 3.58V |
2.5V |
10V |
21.5V |
15.0V |
6 |
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Va |
2 |
Below 1.74V |
Above 3.35V |
3.04V |
40V |
77V |
70.0V |
1 |
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12V |
5 |
Below 2.00V |
Above 3.00V |
2.5V |
9.6V |
14.4V |
12V |
2 |
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Ve |
4 |
Below 1.79V |
Above 3.08V |
2.69V |
70V |
120V |
105V |
8 |
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Vset |
3 |
Below 1.92V |
Above 3.20V |
2.5V |
150V |
250V |
195V |
7 |
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Vscan |
6 |
Below 3.25V |
Above 1.91V |
2.58V |
140V |
240V |
190V |
3 |
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Vs |
1 |
Below 1.90V |
Above 2.79V |
2.5V |
160V |
235V |
210V |
5 |
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Vs_on |
17 |
Below 0.60V |
Above 2.00V |
Active High (Above 2.5V) |
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Temp |
16 |
Below 1.56V |
Above 3.64V |
Active Low |
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9 |
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DC_Prot |
10 |
Below 0.40V |
Above 0.60V |
Active High |
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11 |
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5V2 |
10 |
Below 6.40V |
Above 7.15V |
Active High |
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6.8V |
5.2V |
11 |
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Location of supply voltages from PSU to the boards
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Voltage test points
42” SD v5, 42” HD w1, 50” HD w1
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Voltage outputs
42” SD v5, 42” HD w1, 50” HD w1
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Repair tips
May 21, 2009
Symptom 1: NO POWER
■ Check or change:
1.F8001(250V/8A) OPEN
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Symptom 1: NO POWER
■ Check or change:
2. R8012, R8013 OPEN
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Symptom 1: NO POWER
■ Check or change: 3. D8006 SHORT
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Symptom 1: NO POWER
■ Check or change:
4. D8009, D8010, D8011, RT8001 SHORT/OPEN
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