4-2
ELECTRICAL TROUBLESHOOTING GUIDE
Reset or power check.
OK
Check the power (5V/12V) signal
path from SMPS.
Repair the SMPS Block
NO
Are the Pin1 of
5V, Pin4 of 12V
respectively after the power
cable connecting?
Check the LIC901 and
LIC901 input voltage 5V (Pin#3)
NO
<Power>
Is the Pin2 of LIC901
3.3V?
Check it after connecting the power cable only on
interface cable for
NO Reset or Power ON
.
YES
YES
YES
Check the LIC902 and
LIC902 input voltage 3.3V (Pin#3)
NO
<Power>
Is the pin2 of LIC903
1.2V?
YES
YES
Check the LX501(25MHz),
Check the LIC501
NO
Are the LX501 oscillating?
YES
YES
Check the AVCC 5volt and
Reset Circuit.
(LR610,LR855,LC5B0)
NO
Does the Pin120
(Reset in) of LIC501 change
0V to 1.63V at the power supply
initial input mode?
Check the LIC501
NO
<Reference>
1.65V (V14ref) :
Check Pin1 of LIC501
2.2V (VFVREF) : Check Pin2 of
LIC501 2.2V (VHAVC) :
Check Pin3 of
LIC501
1. RESET OR POWER CHECK
Summary of Contents for XV-BP1A
Page 13: ...2 6 MEMO ...
Page 54: ...3 41 3 Video Part 1 100 Full Color bar 7 9 10 8 11 14 CVBS_I 7 Y 8 Pb 9 Pr 10 ...
Page 56: ...3 43 5 AUDIO PART S PDIF 15 17 16 18 19 21 ASPDIF 15 ...
Page 57: ...3 44 6 HDMI PART 17 16 18 19 21 20 HDMI_SDA 16 HDMI_SCL 17 HDMI_CLK 18 HDMI_DATA 19 ...
Page 58: ...3 45 7 FRONT I F PART 21 20 T_TX 20 R_RX 21 ...
Page 59: ...3 46 BLOCK DIAGRAMS 1 OVERALL BLOCK DIAGRAM ...
Page 60: ...3 47 2 SMPS BLOCK DIAGRAM ...
Page 61: ...3 48 3 SYSTEM BLOCK DIAGRAM ...
Page 62: ...3 49 4 MT8520 DDR2 SDRAM NAND FLASH EEPROM BLOCK DIAGRAM ...
Page 63: ...3 50 5 MT8520 HDMI ETHERNET USB AV BLOCK DIAGRAM ...
Page 65: ...3 52 7 SMPS POWER SIGNAL BLOCK DIAGRAM ...
Page 66: ...3 53 8 MAIN BOARD POWER SIGNAL BLOCK DIAGRAM ...
Page 68: ...3 55 10 LEVEL SHIFTER CEC EFUSE BLOCK DIAGRAM ...
Page 69: ...3 56 MEMO ...
Page 71: ...3 60 3 59 2 POWER TIMER USB CIRCUIT DIAGRAM ...
Page 72: ...3 61 3 62 3 MT8520 1 CIRCUIT DIAGRAM ...
Page 73: ...3 63 3 64 4 MT8520 2 CIRCUIT DIAGRAM ...
Page 74: ...3 65 3 66 5 KEY CIRCUIT DIAGRAM ...
Page 75: ...3 67 3 68 6 TIMER CIRCUIT DIAGRAM ...
Page 76: ...3 69 3 70 7 DDR2 SDRAM CIRCUIT DIAGRAM ...
Page 77: ...3 71 3 72 8 NAND FLASH ETHERNET CIRCUIT DIAGRAM ...
Page 78: ...3 73 3 74 9 AV HDMI CIRCUIT DIAGRAM ...
Page 79: ...3 75 3 76 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 80: ...3 77 3 78 2 SMPS P C BOARD TOP VIEW BOTTOM VIEW ...
Page 105: ...4 24 MEMO ...
Page 106: ...4 26 4 25 CIRCUIT DIAGRAM ...
Page 108: ...4 29 4 30 PRINTED CIRCUIT BOARD DIAGRAMS TOP VIEW ...
Page 109: ...4 31 4 32 BOTTOM VIEW ...