
ABOUT THIS MANUAL.............................................................3
What you can do with this manual ............................................3
Using Adobe Reader (Windows version) ..................................4
SAFETY PRECAUTIONS..........................................................6
NOTE FOR SCHEMATIC DIAGRAM.........................................7
NOTE FOR PARTS LIST...........................................................7
TECHNICAL SPECIFICATIONS................................................9
DIMENSION...............................................................................9
Precautions During Service...................................................10
Initializing This Unit .................................................................10
Service Jigs.............................................................................10
DISASSEMBLY........................................................................11
1. FRONT PANEL ASSY ........................................................13
2. RADIATOR ASSY...............................................................14
3. SMPS ASSY.......................................................................15
4. POWER TRANS ................................................................16
5. BACK PANEL ASSY...........................................................17
SPECIAL MODE......................................................................18
Special Mode Conguration Buttons.......................................18
1. Version Display Mode ........................................................19
2. PANEL / REMOTE LOCK Selection Mode.........................23
3. Selection Modes for Service-related Operations................24
DIAGNOSTIC PATH DIAGRAM.........................................31
4. Remote ID Setup Mode......................................................74
5. Protection Pass Mode........................................................75
6. CX870 / CY920 Reboot Mode............................................75
7. CX870 / CY920 Initialization Mode ....................................76
JIG FOR SERVICING ..............................................................77
Procedure after Replacing the Microprocessor, etc. ..........79
Firmware Update Procedure..................................................79
1. Updating by USB................................................................79
2. Updating by DPMS.............................................................88
ADJUSTMENT.........................................................................95
SURROUND MODES AND PARAMETERS............................96
TROUBLE SHOOTING............................................................99
1. POWER..............................................................................99
2. Analog video ....................................................................100
3. HDMI/DVI .........................................................................102
4. AUDIO..............................................................................104
5. Network/Bluetooth/USB ...................................................107
6. SMPS...............................................................................112
Audio Check PASS ..............................................................114
CLOCK FLOW & WAVE FORM IN DIGITAL BLOCK...........115
LEVEL DIAGRAM..................................................................116
GND DIAGRAM .....................................................................124
POWER DIAGRAM................................................................125
CPU DIAGRAM......................................................................126
PRINTED WIRING BOARDS.................................................127
SCHEMATIC DIAGRAMS (1/35 ) ..........................................133
SCH01_DIGITAL CONNECT ................................................133
SCH02_DIR ADC ZONEDAC ...............................................134
SCH03_AUDIO PLD .............................................................135
SCH04_DSP1 .......................................................................136
SCH05_DSP2 .......................................................................137
SCH06_DSP3 .......................................................................138
SCH07_DSP4 .......................................................................139
SCH08_MAIN CPU ...............................................................140
SCH09_SUB CPU.................................................................141
SCH10_DECODER...............................................................142
SCH11_HDMI SW1...............................................................143
SCH12_HDMI SW2...............................................................144
SCH13_IP SCALER..............................................................145
SCH14_IP SCALER DDR .....................................................146
SCH15_VIDEO PLD .............................................................147
SCH16_HDMI RX TX............................................................148
SCH17_HDMI SUPPLY.........................................................149
SCH18_NETWORK ..............................................................150
SCH19_AUDIO VIDEO CONNECT ......................................151
SCH20_AUDIO VOLUME .....................................................152
SCH21_PREOUT..................................................................153
SCH22_VIDEO SELECTOR .................................................154
SCH23_CONNECT...............................................................155
SCH24_ZONEDAC ADC.......................................................156
SCH25_MAIN DAC ...............................................................157
SCH26_FRONT HDMI USB..................................................158
SCH27_SPEAKER................................................................159
SCH28_REG.........................................................................160
SCH29_FRONT ....................................................................161
SCH30_SMPS ......................................................................162
SCH31_AMP CONNECT ......................................................163
SCH32_232C PHONO..........................................................164
SCH33_POWER AMP...........................................................165
SCH34_CX870 CONNECT (CX870 Only) ............................166
SCH35_BT MODULE (CX870 Only).....................................167
EXPLODED VIEW .................................................................168
PACKING VIEW.....................................................................169
SEMICONDUCTORS.............................................................170
1. IC's...................................................................................170
2. FL DISPLAY .....................................................................192
CONTENTS
2