2-84
When you turn on your set, it will blank / no message or “PLEASE WAIT” display on front panel,
and it will not boot-up.
1-3-4. IC151 (NO 1.5 V)
1-3-4-1.
Solution
Replace IC151 on MAIN board.
1-3-4-2. How to troubleshoot (Countermeasure)
1) Please check 1.5 V of C1A7 on MAIN board.
2) If 1.5V voltage doesn’t come out,
- Check IC151 pin2 (Vcc 14 VA).
If there is no 14 VA, please check PWR_CTRL(IC101 pin59) and 14 VA from SMPS.
(go to previous page to check it)
3) If V input pin2 of IC151 is 14 VA signal,
first of all check the 1.5 V_CTRL is high (IC101 pin59) and if it’s high,
check R145, R1A7, L150, R1A2, R1A4, R1A8 and if there’s no defective component,
please replace IC151.
4) If PWR_CTRL or 1.5 V_CTRL isn’t high, you may need to replace IC101.
5) After changing it, if the set is still not booting:
- Check 1.2 / 3.3 V is normal. (please refer to other sections of this guide)
- Check crystal X500 refer to item 1-3-5.
- Check NAND flash IC (IC506) refer to item 1-3-6.
- Check DDR IC (IC502, IC503) refer to item 1-3-7.
- Check BCM7633 IC (IC500) refer to item 1-3-8.
1-3-4-3. Service hint (Any picture / Remark)
< MAIN board top view >
MAIN SET ONE POINT REPAIR GUIDE
L150
IC151
C1A7
Содержание LHB976
Страница 15: ...1 14 MEMO ...
Страница 127: ...2 112 X101 20 MHz 3 X200 24 57 MHz 4 X500 27 MHz 1 X802 28 63 MHz 2 WAVEFORMS 1 SYSTEM PART 1 X TAL 1 2 4 3 IC500 IC101 ...
Страница 128: ...2 113 2 SYSTEM PART 2 DDR3 MEMORY DDR3_BA0 5 DDR3_nWE 6 DDR3_nCAS 7 DDR3_CLK01_P 8 IC500 5 6 7 8 ...
Страница 129: ...2 114 3 VIDEO PART 100 FULL COLOR BAR COMPOSITE 9 COMP_Y 10 COMP_Pb 11 COMP_Pr 12 11 12 10 9 ...
Страница 130: ...2 115 HPD_TX 13 DDC_SDA 14 DDC_SCL 15 TXC 16 15 14 16 13 4 HDMI PART ...
Страница 131: ...2 116 5 MICOM AND MPEG I F PART BCM_nRESET 17 18 19 17 MICOM_UART_RX2 18 MICOM_UART_TX2 19 ...
Страница 161: ...2 176 2 175 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN SET P C BOARD 1 1 MAIN P C BOARD TOP VIEW ...
Страница 162: ...2 178 2 177 MAIN SET P C BOARD MAIN P C BOARD BOTTOM VIEW ...
Страница 164: ...2 182 2 181 MAIN SET P C BOARD 1 3 AMP P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 166: ...2 186 2 185 PRINTED CIRCUIT BOARD DIAGRAMS 2 WIRELESS RECEIVER P C BOARD 2 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 169: ...3 2 MEMO ...
Страница 172: ...3 7 A700 2 SPEAKER SECTION 2 1 CENTER SPEAKER EXPLODED VIEW ...
Страница 173: ...3 8 852 851 851 851 Screw 8ea A800B A800 A800F 852 Screw 2ea 850 2 2 FRONT SPEAKER EXPLODED VIEW ...
Страница 174: ...3 9 A600 2 3 REAR SPEAKER EXPLODED VIEW ...
Страница 175: ...3 10 A900 2 4 PASSIVE SUBWOOFER EXPLODED VIEW ...
Страница 189: ...4 12 2 DRIVE IC R2A30209SP SPINDLE MOTOR AND 6CH ACTUATOR DRIVER 2 1 Block Diagram ...
Страница 193: ...4 16 MEMO ...