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Contents
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. DIGITAL PCB .....................................................................15
4. VIDEO PCB ........................................................................16
5. INPUT PCB ........................................................................16
6. SPK PCB ............................................................................17
7. SMPS PCB .........................................................................18
8. TRANS POWER ................................................................18
SPECIAL MODE ......................................................................19
Special Mode Configuration Buttons .......................................19
1. Version Display Mode ........................................................20
2. PANEL / REMOTE LOCK Selection Mode .........................23
3. Selection Modes for Service-related Operations ................24
DIAGNOSTIC PATH DIAGRAM .........................................29
4. Protection Pass Mode ........................................................63
5. CX870 / CY920 Reboot mode ............................................63
6. CX870 / CY920 Initialization mode ....................................64
JIG FOR SERVICING ..............................................................65
Procedure after Replacing the Microprocessor, etc. ..........68
Firmware Update Procedure..................................................68
1. Updating by USB ................................................................68
2. Updating by DPMS .............................................................78
ADJUSTMENT .........................................................................85
SURROUND MODES AND PARAMETERS ............................86
TROUBLE SHOOTING ............................................................89
1. POWER ..............................................................................89
2. Analog video ......................................................................90
3. HDMI/DVI ...........................................................................94
4. AUDIO ................................................................................96
5. Network/Bluetooth/USB .....................................................99
6. SMPS ...............................................................................105
Audio Check PASS ..............................................................107
CLOCK FLOW & WAVE FORM IN DIGITAL BLOCK ...........108
LEVEL DIAGRAM ..................................................................109
BLOCK DIAGRAM .................................................................115
POWER DIAGRAM ................................................................116
WIRING DIAGRAM for CX870 ..............................................117
WIRING DIAGRAM for CX920 ..............................................118
PRINTED WIRING BOARDS .................................................119
SCHEMATIC DIAGRAMS (1/33 ) ..........................................125
SCH01_DIGITAL CONNECT ................................................125
SCH02_DIGITAL POWER ....................................................126
SCH03_MAIN CPU ...............................................................127
SCH04_SUB CPU .................................................................128
SCH05_CPU LEVEL CHG ....................................................129
SCH06_DIR ..........................................................................130
SCH07_AUDIO PLD .............................................................131
SCH08_DSP .........................................................................132
SCH09_MAIN DAC ...............................................................133
SCH10_CY920 ......................................................................134
SCH11_VIDEO DECODER ...................................................135
SCH12_HDMI SW2 ...............................................................136
SCH13_HDMI SW1 ...............................................................137
SCH14_VSP & IP & OSD ......................................................138
SCH15_VIDEO PLD .............................................................139
SCH16_HDMI TX & SCALER ...............................................140
SCH17_ADAPTER (CX870 ONLY) .......................................141
SCH18_BLUETOOTH (CX870 ONLY) ..................................142
SCH19_INPUT1 ....................................................................143
SCH20_INPUT2 ....................................................................144
SCH21_PREOUT ..................................................................145
SCH22_F-HDMI ....................................................................146
SCH23_VIDEO .....................................................................147
SCH24_RC-5 & MX-PORT ...................................................148
SCH25_RS232C & TRIGGER ..............................................149
SCH26_CONNECT_A ...........................................................150
SCH27_CONNECT_B ..........................................................151
SCH28_SPK .........................................................................152
SCH29_REGULATOR & TUNER ..........................................153
SCH30_7CH AMP 1 ..............................................................154
SCH31_7CH AMP 2 ..............................................................155
SCH32_FRONT ....................................................................156
SCH33_SMPS ......................................................................157
EXPLODED VIEW .................................................................158
PACKING VIEW .....................................................................159
SEMICONDUCTORS .............................................................160
1. IC's ...................................................................................160
2. FL DISPLAY .....................................................................182
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