KDL-60W840B, KDL-60W850B, KDL-60W855B, KDL-60W857B, KDL-70W830B, KDL-70W840B, KDL-70W850B, KDL-70W855B, KDL-70W856B, KDL-70W857B - Sony TV Service Manual (repair manual). Page 2

Read Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual online

Chassis: RB2G, HE-H
Chassis: RB2G, HE-H 
2
TABLE OF CONTENTS
SECTION TITLE 
PAGE
SECTION 1:  DIAGRAMS ................................................................................................................................................................................................... 8
 
1.1 - Printed Circuit Boards and Schematic Diagrams Information .................................................................................................................... 8
SECTION 1:  DIAGRAMS ................................................................................................................................................................................................... 9
 
1.2 - Circuit Boards Location .............................................................................................................................................................................. 9
SECTION 2:  TROUBLESHOOTING ................................................................................................................................................................................ 10
 
2.1-1 - No Power .............................................................................................................................................................................................. 10
 
2.1-2 - No Power: DC / DC Converter Check ................................................................................................................................................... 11
 
2.1-3 - No Power: AYU2L Control ..................................................................................................................................................................... 13
 
2.1-4 - No Power: AYU2 / AYU2L Failure ......................................................................................................................................................... 16
 
2.1-5 - No Power: AYU2 / AYU2L Replacement ............................................................................................................................................... 17
2.2-1 - LED Blinking: 3x (DC Alert & Communication Error) ............................................................................................................................ 18
2.2-2 - LED Blinking: 3x (DC Alert & Communication Error) ............................................................................................................................ 19
 
2.2-3 - LED Blinking: 3x (Audio Error) - BAX-L Board ...................................................................................................................................... 23
 
2.2-4 - LED Blinking: 4x (LED Voltage Error) ................................................................................................................................................... 26
 
2.2-5 - LED Blinking: 5x (T-Con Error) ............................................................................................................................................................. 27
 
2.2-6 - LED Blinking: 6x (Backlight Error) ........................................................................................................................................................ 28
 
2.2-7 - LED Blinking: 7x (Temperature Error) ................................................................................................................................................... 29
 
2.3 - No Sound ................................................................................................................................................................................................. 31
 
2.3-1 - No Sound: Audio (For All Model) TUS, BAX-L Board Only ................................................................................................................... 32
 
2.3-2 - No Sound: Main Board Power Off Checking (For Main Speaker L & R) For BAX-L Board Only .......................................................... 35
 
2.3-3 - Main Board Power On Checking (For Main Speaker L&R) for BAX-L Board Only ............................................................................... 38
 
2.3-3 - Main Board Power On Checking (For Main Speaker L&R) for BAX-L Board Only ............................................................................... 39
 
2.3-4 - No Sound: HP / Lineout Only for BAX-L Board ..................................................................................................................................... 45
 
2.3-5 - No Sound: Tuner ................................................................................................................................................................................... 50
 
2.3-7 - No Sound: MHL .................................................................................................................................................................................... 52
 
2.4 - RB2 Analog Signal Path ........................................................................................................................................................................... 54
 
2.5 - No Picture: BAX + TUS ............................................................................................................................................................................ 55
 
2.5-1 - No Picture: HDMI .................................................................................................................................................................................. 56
 
2.5-2 - No Picture: HDMI (BAX-L & BAX Board) .............................................................................................................................................. 58
 
2.5-3 - No Picture: HDMI (BAX-L & BAX Board) .............................................................................................................................................. 61
 
2.5-4 - No Picture: LD Models Only ................................................................................................................................................................. 63
 
2.5-5 - No Picture: All Model ............................................................................................................................................................................ 64
 
2.6-1 - Input Skip Function: BAX-L ................................................................................................................................................................... 65
 
2.7-1 - Side Buttons Malfunction ...................................................................................................................................................................... 66
 
2.8-1 - Light Sensor Error ................................................................................................................................................................................. 66
 
2.9-1 - IR Remote Commander Malfunction .................................................................................................................................................... 66
 
2.10-1 - Network Malfunction: Ethernet (Wired) ............................................................................................................................................... 67
 
2.11-1 - Active 3D Glasses Malfunction ........................................................................................................................................................... 69
 
2.12-1 - Wireless Network Malfunction ............................................................................................................................................................ 70
 
2.13-1 - Bluetooth Malfunction ......................................................................................................................................................................... 71
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