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996500033880 SDI PSU (LJ44-00101C) repair tips
May 21, 2009
SDI PSU (LJ44-00101C)
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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
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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
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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 VA OVP, UVP 12V OVP, UVP VSCAN OVP, UVP D3V3 OVP, UVP VS OVP, UVP Vg OVP, UVP VSET OVP, UVP VE OVP, UVP Over Temperature PFC_OK UVP 5V2 OVP or Active DC_PROT Time Over D5VL OVP, UVP OVP: Over Voltage Protection UVP: Under Voltage Protection
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No. of times LED blinking 1 2 3 4 5 6 7 8 9 10 11 12 13
Protection Circuit Specification
HIC8001 PIN
Low level
High level
Normal level
Output Output Normal OVP UVP
Error
Relay
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Normal High (5.2V ± 0.1V) Below 1.56V Above 3.64V Active Low (Below 0.9V) Normal High (5.2V ± 0.1V) Below 1.56V Above 3.64V 330V Active Low (Below 0.3V) Below 1.68V Above 3.36V Below 1.91V Above 3.45V 2.49V 2.53V 3.5V 2.5V 7.0V 4.5V 77V 14.4V 380V 5.2V 3.3V 70.0V 12V 10 13 4
PFC_OK D5V D3V3
15 9 7
Vg
Va 12V Ve Vset Vscan Vs Vs_on Temp DC_Prot 5V2
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2 5 4 3 6 1 17 16 10 10
Below 1.66V Above 3.58V
Below 1.74V Above 3.35V Below 2.00V Above 3.00V Below 1.79V Above 3.08V Below 1.92V Above 3.20V Below 3.25V Above 1.91V Below 1.90V Above 2.79V Below 1.56V Above 3.64V Below 0.40V Above 0.60V Below 6.40V Above 7.15V
2.5V
3.04V 2.5V 2.69V 2.5V 2.58V 2.5V Active Low Active High Active High
10V
40V 9.6V 70V 150V 140V 160V
21.5V 15.0V
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1 2 8 7 3 5 9 11
120V 105V 250V 195V 240V 190V 235V 210V
Below 0.60V Above 2.00V Active High (Above 2.5V)
6.8V
5.2V
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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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Symptom 1: NO POWER
Check or change: 5. D8013, D8014, D8015, D8023, D8024, D8025, RT8002 SHORT/OPEN
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Symptom 1: NO POWER
Check or change: 6. D8001, D8002, D8003, D8004 SHORT/OPEN
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Symptom 1: NO POWER
Check or change: 7. C8001 OPEN/SHORT/BURST (Under heat sink H8002 - only applicable to REV 0.55 OR REV 0.65)
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Symptom 1: NO POWER
Check or change: 8. C8007, C8010 OPEN/SHORT/BURST
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Symptom 1: NO POWER
Check or change: 9. Q8001, Q8003 SHORT
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Symptom 2: No 5V2
Check or change: 1. F8001(250V/8A) OPEN
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Symptom 2: No 5V2
Check or change: 2. IC8003, Q8008, D8018, ZD8225, D8016, ZD8100 , D8017, ZD8200
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Symptom 2: No 5V2
Check or change: 3. Copper side: Q8002, ZD8205, ZD8102
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Symptom 3: Abnormal relay On/Off
Check or change: 1) U8003 DEAD
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Symptom 3: Abnormal relay On/Off
Check or change: 2) IC8012 DEAD
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Symptom 3: Abnormal relay On/Off
Check or change: 3) HIC8001 ALARM BOARD
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Symptom 3: Abnormal relay On/Off
Check or change: 4) IC8011 DEAD
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Symptom 4: Error 10 (PFC_OK Protection)
Check or change: 1) IC8007 and/or Q8013
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Symptom 4: Error 10 (PFC_OK Protection)
Check or change: 2) HIC8002 PIN 1 or IC8007
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Symptom 4: Error 10 (PFC_OK Protection)
Check or change: 3) PFC Feedback resistors
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Symptom 5: Error 6 and/or Error 12
Check or change: 1) F8005(250V/2A) OPEN
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Symptom 5: Error 6 and/or Error 12
Check or change: 2a) TOP SIDE: IC8016, Q8015, D8032, D8036, D8061, ZD8201
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Symptom 5: Error 6 and/or Error 12
Check or change: 2b) BOTTOM SIDE: ZD8223, ZD8230, Q8017, ZD8101, ZD8005
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Symptom 5: Error 6 and/or Error 12
Check or change: 3) IC8010
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Symptom 5: Error 6 and/or Error 12
Check or change: 4) Vtun NO VOLTAGE F8004 OPEN, R8120 OPEN
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Symptom 5: Error 6 and/or Error 12
Check or change: 5) 5V_SW NO VOLTAGE IC8013
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Symptom 5: Error 6 and/or Error 12
Check or change: 6) 12V NO VOLTAGE IC8020, IC8021
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Symptom 5: Error 6 and/or Error 12
Check or change: 7) 12VL NO VOLTAGE Q8220
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Symptom 6: Error 13 and/or Error 4
Check or change: 1) F8007 (250V/4A) OPEN
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Symptom 6: Error 13 and/or Error 4
Check or change: 2a) IC8017, Q8016, D8038, D8029, ZD8202(Below heat sink H8002)
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Symptom 6: Error 13 and/or Error 4
Check or change: 2b) ZD8004, ZD8229, Q8018
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Symptom 6: Error 13 and/or Error 4
Check or change: 3) SEQUENCE VOLTAGE "B" 18V CHECK (IC8005)
I couldn't find the IC8005 in Rev 0.7 PSU. If you find it in other Revisions, please let me know
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Symptom 6: Error 13 and/or Error 4
Check or change: 4) Vsnd±18V NO VOLTAGE F8003(250V/3.15A) OR F8006(250V/3.15A) OPEN
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Symptom 6: Error 13 and/or Error 4
Check or change: 5) D5V NO VOLTAGE IC8014 CHANGE
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Symptom 6: Error 13 and/or Error 4
Check or change: 6) 8V6 NO VOLTAGE IC8041 CHANGE
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Symptom 6: Error 13 and/or Error 4
Check or change: 7) D3VD NO VOLTAGE IC8022, IC8023
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Symptom 7: Error 1 (Va Protection)
Check or change: 1) F8007 (250V/4A) OPEN
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Symptom 7: Error 1 (Va Protection)
Check or change: 2) SEQUENCE VOLTAGE "DC_VCC" 18V: CHECK (D8020)
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Symptom 7: Error 1 (Va Protection)
Check or change: 3) IC8028, ZD8001, ZD8002
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Symptom 7: Error 1 (Va Protection)
Check or change: 4) C8112, C8107, C8102, C8116, C8103, C8110
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Symptom 7: Error 1 (Va Protection)
Check or change: 5) VG NO VOLTAGE OR VA 90V Change IC8026
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Symptom 7: Error 1 (Va Protection)
Check or change: 6) VA NO VOLTAGE IC8032, IC8036
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Symptom 8: Error 5 (Vs Protection)
Check or change: 1) F8007(250V/4A) OPEN
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Symptom 8: Error 5 (Vs Protection)
Check or change: 2) SEQUENCE VOLTAGE VS_VCC 18V: Q8007
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Symptom 8: Error 5 (Vs Protection)
Check or change: 3) VSVCC 15V: IC8034
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Symptom 8: Error 5 (Vs Protection)
Check or change: 4) Q8020, Q8022, ZD8203, ZD8204
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Symptom 8: Error 5 (Vs Protection)
Check or change: 5) T8201, C8202, C8203
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Symptom 8: Error 5 (Vs Protection)
Check or change: 6) PWM Board HIC8003
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Symptom 8: Error 5 (Vs Protection)
Check or change: 7) IC8030, IC8033, IC8037, IC8038
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Symptom 8: Error 5 (Vs Protection)
Check or change: 8) U8005
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Symptom 9: Error 7, 3, 8
Check or change: 1. VSET, VSCAN PROTECTION a) F8008 (250V/1A) OPEN b) VSET NO VOLTAGE IC8015, D8039 IC8018, IC8019 c) VSCAN NO VOLTAGE IC8024, D8044 IC8025, IC8027
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Symptom 9: Error 7, 3, 8
Check or change: 2. VE PROTECTION a) F8009(250V/1A) OPEN b) VE NO VOLTAGE IC8029, D8054 IC8031, IC8035
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Symptom 10: Error 11 (5V2 Over voltage protection)
Check or change: 5V2 OVP PROTECTION or Active DC protection a) HIC8001 Change Alarm board b) Check STANDBY OUTPUT section
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Symptom 11: Error 12 (Time over protection)
Check or change: TIME OVER PROTECTION (REV 0.7 EXCEPTION) Change alarm board HIC8001
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Symptom 12: Error 9 (Thermal protection)
Check or change: THERMAL PROTECTION (REV 0.7 EXCEPTION) 1) U8002 2) IC8008, Q8014
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Symptom 13: Noise from inductors
Check or change: L8002, L8005, L8006
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Symptom 14: Intermittently, TV Auto off after some time, error 8 or error 13 via alarm board
· Cure: Replace following items: C8059 3300uF/10V [Becomes dry or burst] C8060 3300uF/10V [Becomes dry or burst] R8094 1M SMD resistor [If you find 910K then change to 1M 1%]
R8094
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