4-3
2010
COMPONENT REPAIR GUIDE
2. "ALL BD DISC" READING ERROR
- All the Blu-ray disc is not operated, but DVD and CD are operated normally.
- If the LDO for APC of BD laser diode is abnormal, BD doesn't work.
- If the LD current control is abnormal, BD doesn't work.
2-1. Component
1) MD (Traverse Assembly)
2) IC707 – Adjustable LDO
2-2. How to troubleshoot (Countermeasure)
1) Check MD (Traverse, pick-up) first of all
2) Check input/output voltage of LDO IC707 – (12V, 8.1V)
3) If output voltage is abnormal, check the periphery of IC707 and replace it.
4) Check the BD LD Control input/output.
If input signal (LTHR_LPF) is ok But no output (LDI_BD), Check the TR Q714,716
2-3. Service hint (Any picture / Remark)
LTHR_LPF
12V
8.1V
INPUT(FROM MAIN CHIP)
OUTPUT(TO PICK-UP)
Summary of Contents for BD550
Page 11: ...MEMO 1 10 2010 ...
Page 93: ...1 System Part 1 7630 XTAL 27MHz 1 1 3 78 2010 WAVEFORMS ...
Page 97: ...5 AUDIO PART S PDIF 7630_AUDIO_SPDIF 14 14 17 11 12 3 82 2010 ...
Page 98: ...6 HDMI PART H_SDA 15 H_SCL 16 HDMI_CLK_N 17 HDMI_0_N 18 4 15 17 18 16 19 20 3 83 2010 ...
Page 99: ...7 MICOM I F PART 17 18 19 20 Tx0 19 Rx0 20 3 84 2010 ...
Page 107: ...3 92 2010 MEMO ...
Page 125: ...3 127 3 128 MEMO MEMO ...
Page 137: ...4 12 2010 2 IC704 R2A30209SP W02Z SPINDLE MOTOR AND 6CH ACTUATOR DRIVER 2 1 Block Diagram ...
Page 141: ...4 16 2010 MEMO ...