Service Manual
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SERVICE MANUAL LCD COLOR TV LC-15AV7U SERVICE MANUAL S17F1LC15AV7U LCD COLOR TV MODEL LC-15AV7U In the interests of user-safety (Required by safety regulations in some countries) the set should... . CONTENTS Page SPECIFICATIONS ...1-1 IMPORTANT SAFEGUARDS AND PRECAUTIONS 2-1 STANDARD NOTES FOR SERVICING 3-1 CABINET DISASSEMBLY INSTRUCTIONS 4-1 ELECTRICAL ADJUSTMENT INSTRUCTIONS 5-1 HOW TO INITIALIZE THE LCD TELEVISION 6-1 TROUBLESHOOTING ...7-1 BLOCK DIAGRAMS ...8-1 SCHEMATIC DIAGRAMS/ CBA'S AND TEST POINTS 9-1 WAVEFORMS ...10-1 WIRING DIAGRAM ...11-1 IC PIN FUNCTION DESCRIPTIONS 12-1...
SERVICE MANUAL LCD COLOR TV LC-15AV7U SERVICE MANUAL S17F1LC15AV7U LCD COLOR TV MODEL LC-15AV7U In the interests of user-safety (Required by safety regulations in some countries) the set should... . CONTENTS Page SPECIFICATIONS ...1-1 IMPORTANT SAFEGUARDS AND PRECAUTIONS 2-1 STANDARD NOTES FOR SERVICING 3-1 CABINET DISASSEMBLY INSTRUCTIONS 4-1 ELECTRICAL ADJUSTMENT INSTRUCTIONS 5-1 HOW TO INITIALIZE THE LCD TELEVISION 6-1 TROUBLESHOOTING ...7-1 BLOCK DIAGRAMS ...8-1 SCHEMATIC DIAGRAMS/ CBA'S AND TEST POINTS 9-1 WAVEFORMS ...10-1 WIRING DIAGRAM ...11-1 IC PIN FUNCTION DESCRIPTIONS 12-1...
Service Manual
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... % -6dB: Lch Hz -6dB: Rch Hz VIDEO1 dB VIDEO2 dB Nominal 1.0/1.0 1.5/1.5 70 to 8 k 70 to be considered a defect in the LCD screen. 1-1 A7121SP This is manufactured to 50 Description 1. Limit ------- ±0.005 ±0.005 ------- Response 4. Viewing Angle Condition Horizontal Vertical Horizontal Vertical Unit...˚ Nominal 1024 768 -60 to 60 -50 to provide many years of useful life. Limit 0.8/0.8 3.0/3.0 ---->45/45 >45/45 The LCD panel is not to 8 k ----- SPECIFICATIONS VHF/UHF Input 75ohm Unbal., F type Intermediate Freq Picture 45.75 MHz, Sound 41.25 MHZ ...
... % -6dB: Lch Hz -6dB: Rch Hz VIDEO1 dB VIDEO2 dB Nominal 1.0/1.0 1.5/1.5 70 to 8 k 70 to be considered a defect in the LCD screen. 1-1 A7121SP This is manufactured to 50 Description 1. Limit ------- ±0.005 ±0.005 ------- Response 4. Viewing Angle Condition Horizontal Vertical Horizontal Vertical Unit...˚ Nominal 1024 768 -60 to 60 -50 to provide many years of useful life. Limit 0.8/0.8 3.0/3.0 ---->45/45 >45/45 The LCD panel is not to 8 k ----- SPECIFICATIONS VHF/UHF Input 75ohm Unbal., F type Intermediate Freq Picture 45.75 MHz, Sound 41.25 MHZ ...
Service Manual
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... such compliance, it to be corrected before the instrument is being serviced. Repeat this test with American National Standards Institute (ANSI) C101.1 Leakage Current for LCD TV Circuit 1. d. Design Alteration Warning - Do not alter or add to the mechanical or electrical design of an ohmmeter to the AC plug prongs tied...
... such compliance, it to be corrected before the instrument is being serviced. Repeat this test with American National Standards Institute (ANSI) C101.1 Leakage Current for LCD TV Circuit 1. d. Design Alteration Warning - Do not alter or add to the mechanical or electrical design of an ohmmeter to the AC plug prongs tied...
Service Manual
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... connection to all safety checks and the servicing guidelines which do not have the same safety characteristics as the factory recommended replacement parts shown in LCD television have these checks.) Any reading of completing these special safety characteristics are not pinched, and check that no modification of a substitute replacement parts which...
... connection to all safety checks and the servicing guidelines which do not have the same safety characteristics as the factory recommended replacement parts shown in LCD television have these checks.) Any reading of completing these special safety characteristics are not pinched, and check that no modification of a substitute replacement parts which...
Service Manual
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... Stand Holder [7] Jack Holder [8] DTV Module CBA Unit [9] Main CBA [2] Stand Cover [6] IR Sensor CBA [10] LCD Holder [11] LVDS CBA Unit [12] LCD Module [16] Front Cabinet [17] Front Cover Step/ Loc. Disassembly Flowchart This flowchart indicates the disassembly steps for the...reassembling, follow the steps in the Table." 4-1 A7121DC PCB Holder [9] Main CBA D2 D4 --- [10] LCD Holder D2 5(S-10), 4(S-11) --- [11] LVDS CBA Unit D2 D4 3(S-12), *CN1411 --- [12] LCD Module D2 --- [13] Junction-A CBA D2 Desolder --- [14] Junction-B CBA D2 Desolder --- [15...
... Stand Holder [7] Jack Holder [8] DTV Module CBA Unit [9] Main CBA [2] Stand Cover [6] IR Sensor CBA [10] LCD Holder [11] LVDS CBA Unit [12] LCD Module [16] Front Cabinet [17] Front Cover Step/ Loc. Disassembly Flowchart This flowchart indicates the disassembly steps for the...reassembling, follow the steps in the Table." 4-1 A7121DC PCB Holder [9] Main CBA D2 D4 --- [10] LCD Holder D2 5(S-10), 4(S-11) --- [11] LVDS CBA Unit D2 D4 3(S-12), *CN1411 --- [12] LCD Module D2 --- [13] Junction-A CBA D2 Desolder --- [14] Junction-B CBA D2 Desolder --- [15...
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D2 4-3 A7121DC [17] Front Cover [16] Front Cabinet [14] Junction-B CBA (S-5) Speaker Holder (S-5) [4] Function CBA (S-5) Desolder [15] Speaker (S-13) [12] LCD Module [11] LVDS CBA Unit [15] Speaker (S-7) Desolder (S-12) [10] LCD Holder (S-11) (S-10) (S-11) [9] Main CBA [6] IR Sensor CBA Speaker Holder (S-13) [13] Junction-A CBA (S-11) (S-10) (S-11) (S-10) (S-10) (S-9) (S-6) (S-9) [7] Jack Holder (S-8) (S-9) [5] Tilt Stand Holder (S-9) (S-9) Module PCB Holder [8] DTV Module CBA Unit Fig.
D2 4-3 A7121DC [17] Front Cover [16] Front Cabinet [14] Junction-B CBA (S-5) Speaker Holder (S-5) [4] Function CBA (S-5) Desolder [15] Speaker (S-13) [12] LCD Module [11] LVDS CBA Unit [15] Speaker (S-7) Desolder (S-12) [10] LCD Holder (S-11) (S-10) (S-11) [9] Main CBA [6] IR Sensor CBA Speaker Holder (S-13) [13] Junction-A CBA (S-11) (S-10) (S-11) (S-10) (S-10) (S-9) (S-6) (S-9) [7] Jack Holder (S-8) (S-9) [5] Tilt Stand Holder (S-9) (S-9) Module PCB Holder [8] DTV Module CBA Unit Fig.
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TV Cable Wiring Diagram Function CBA CL1107 To LCD Module Main CBA To LCD Module CN401 CN403 CN1301 CN1402 CN1411 CN1401 LVDS CBA Unit CN1202 CN1201 Junction-A CBA CL801 CN801 To Speaker CN1302 CL1104 IR Sensor CBA CN62 CN61 CN102 CN101 CN802 Junction-B CBA CL802 DTV Module CBA Unit To Speaker Fig. D3 4-4 A7121DC
TV Cable Wiring Diagram Function CBA CL1107 To LCD Module Main CBA To LCD Module CN401 CN403 CN1301 CN1402 CN1411 CN1401 LVDS CBA Unit CN1202 CN1201 Junction-A CBA CL801 CN801 To Speaker CN1302 CL1104 IR Sensor CBA CN62 CN61 CN102 CN101 CN802 Junction-B CBA CL802 DTV Module CBA Unit To Speaker Fig. D3 4-4 A7121DC
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...value are not within specification, adjust "C-COB(C/D2)" or "C-COR(C/D2)". Press [4] button to select "C-DB(C/D2)" for Red adjustment. Press [1] button to the LCD Panel surface. 4. [RF/INPUT1] Enter the service mode. L = 3 cm INPUT: WHITE 80%, 20% Color Analyzer 1. Operate the unit for Blue adjustment...button on the remote control unit and select "C/D1" mode. [INPUT2] Enter the service mode. Then input above . Only when replacing the LCD Panel then adjust as shown above signal. 2. [RF/INPUT1] Press [MENU] button on the remote control unit and press [1] on the remote...
...value are not within specification, adjust "C-COB(C/D2)" or "C-COR(C/D2)". Press [4] button to select "C-DB(C/D2)" for Red adjustment. Press [1] button to the LCD Panel surface. 4. [RF/INPUT1] Enter the service mode. L = 3 cm INPUT: WHITE 80%, 20% Color Analyzer 1. Operate the unit for Blue adjustment...button on the remote control unit and select "C/D1" mode. [INPUT2] Enter the service mode. Then input above . Only when replacing the LCD Panel then adjust as shown above signal. 2. [RF/INPUT1] Press [MENU] button on the remote control unit and press [1] on the remote...
Service Manual
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To enter the service mode, press [MENU] and [POWER] buttons on the upper right of the screen. 6-1 A7121INT Confirm "FF" indication on the TV unit simultaneously in the standby mode. 2. To initialize the LCD television, press [DISPLAY] button on the remote control unit. 3. HOW TO INITIALIZE THE LCD TELEVISION 1.
To enter the service mode, press [MENU] and [POWER] buttons on the upper right of the screen. 6-1 A7121INT Confirm "FF" indication on the TV unit simultaneously in the standby mode. 2. To initialize the LCD television, press [DISPLAY] button on the remote control unit. 3. HOW TO INITIALIZE THE LCD TELEVISION 1.
Service Manual
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... IC1202 and input terminal and service it if defective. Check the line between each pin of No IC1202? Yes Replace IC1202, LVDS CBA UNIT or LCD MODULE. 7-7 Check the line between Pin(67) of No IC1202? Are the Pr signals inputted to the Pin(54) of IC1202 and TU61, and ... terminal? Yes Are the video signals inputted to the Pin(56) of CN62, and service it if defective. Yes Replace IC1202, LVDS CBA UNIT or LCD MODULE. Check the line between Pin(73) of IC1202 and Pin(18) of No IC1202? 2. Check the line between JK708 and Pin(66) of ...
... IC1202 and input terminal and service it if defective. Check the line between each pin of No IC1202? Yes Replace IC1202, LVDS CBA UNIT or LCD MODULE. 7-7 Check the line between Pin(67) of No IC1202? Are the Pr signals inputted to the Pin(54) of IC1202 and TU61, and ... terminal? Yes Are the video signals inputted to the Pin(56) of CN62, and service it if defective. Yes Replace IC1202, LVDS CBA UNIT or LCD MODULE. Check the line between Pin(73) of IC1202 and Pin(18) of No IC1202? 2. Check the line between JK708 and Pin(66) of ...
Service Manual
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... REMOTE SENSOR Q1142 LED DRIVE D1142 POWER AL+3.3V(D) IR SENSOR CBA DTV-ON-H BACKLIGHT-SW P-ON-H BACKLIGHT-ADJ TO POWER SUPPLY BLOCK DIAGRAM TO LCD BACKLIGHT BLOCK DIAGRAM IF-MUTE INPUT-2 INPUT-0 INPUT-1 S-SW AFT-IN FSC TO IF/VIDEO BLOCK DIAGRAM SCL SDA SCL SDA VOLUME AUDIO-MUTE TO...
... REMOTE SENSOR Q1142 LED DRIVE D1142 POWER AL+3.3V(D) IR SENSOR CBA DTV-ON-H BACKLIGHT-SW P-ON-H BACKLIGHT-ADJ TO POWER SUPPLY BLOCK DIAGRAM TO LCD BACKLIGHT BLOCK DIAGRAM IF-MUTE INPUT-2 INPUT-0 INPUT-1 S-SW AFT-IN FSC TO IF/VIDEO BLOCK DIAGRAM SCL SDA SCL SDA VOLUME AUDIO-MUTE TO...
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...-2 Q707 Q708 Q709 VIDEO SIGNAL AUDIO SIGNAL MAIN CBA SIF TO AUDIO BLOCK DIAGRAM AFT-IN TO SYSTEM CONTROL BLOCK DIAGRAM RF-CVBS S-VIDEO-C TO LCD BLOCK DIAGRAM S-VIDEO-Y INPUT-0(INV) INPUT-1(INV) INPUT-2(INV) TO AUDIO BLOCK DIAGRAM VIDEO-Y VIDEO-Pb VIDEO-Pr VIDEO-IN1 TO...
...-2 Q707 Q708 Q709 VIDEO SIGNAL AUDIO SIGNAL MAIN CBA SIF TO AUDIO BLOCK DIAGRAM AFT-IN TO SYSTEM CONTROL BLOCK DIAGRAM RF-CVBS S-VIDEO-C TO LCD BLOCK DIAGRAM S-VIDEO-Y INPUT-0(INV) INPUT-1(INV) INPUT-2(INV) TO AUDIO BLOCK DIAGRAM VIDEO-Y VIDEO-Pb VIDEO-Pr VIDEO-IN1 TO...
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IC1202 (LCD DRIVE / SIGNAL PROCESS) TO IF/VIDEO BLOCK DIAGRAM VIDEO-IN1 RF-CVBS S-VIDEO-C S-VIDEO-Y 71 R A/D 67 CVBS WF3 57 C G...A/D 56 WF5 TO IF/VIDEO VIDEO-Y BLOCK VIDEO-Pb 64 DIAGRAM VIDEO-Pr 66 A/D WF6 R G R(ODD) B G(ODD) LCD RGB SIGNAL PROCESS Y B(EVEN) Pb DE 149 144 143 142 141 140 139 138 137 133 132 131 130 129 128 127 126... ~ 30 DE 2 3 50 52 54 56 4 6 8 10 12 14 TTL PARALLEL TO SERIAL CONVERTER ~ 15 16 18 20 22 24 ~ 31 PLL LCD MODULE CN1411 48 5 TA(-) 47 6 TA(+) 46 8 TB(-) 45 9 TB(+) 42 11 TC(-) 41 12 TC(+) 38 20 TD(-) 37 19 TD(+) 14...
IC1202 (LCD DRIVE / SIGNAL PROCESS) TO IF/VIDEO BLOCK DIAGRAM VIDEO-IN1 RF-CVBS S-VIDEO-C S-VIDEO-Y 71 R A/D 67 CVBS WF3 57 C G...A/D 56 WF5 TO IF/VIDEO VIDEO-Y BLOCK VIDEO-Pb 64 DIAGRAM VIDEO-Pr 66 A/D WF6 R G R(ODD) B G(ODD) LCD RGB SIGNAL PROCESS Y B(EVEN) Pb DE 149 144 143 142 141 140 139 138 137 133 132 131 130 129 128 127 126... ~ 30 DE 2 3 50 52 54 56 4 6 8 10 12 14 TTL PARALLEL TO SERIAL CONVERTER ~ 15 16 18 20 22 24 ~ 31 PLL LCD MODULE CN1411 48 5 TA(-) 47 6 TA(+) 46 8 TB(-) 45 9 TB(+) 42 11 TC(-) 41 12 TC(+) 38 20 TD(-) 37 19 TD(+) 14...
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... 13 7 12 9 4 1 IC601 ERROR VOLTAGE DET 3 2 Q913 FEED BACK MAIN CBA Q402 SWITCHING Q403 SWITCHING Q908 SW+3.3V INV+22V BACKLIGHT-SW TO LCD BACKLIGHT BLOCK DIAGRAM TO SYSTEM CONTROL BLOCK DIAGRAM CN62 CN102 4 DTV-ON+3.3V 4 DTV-ON+3.3V 5 DTV-ON+2.5V 5 DTV-ON+2.5V 6 DTV-ON+1.8V... VT+33V DTV-ON-H P-ON-H CN1202 CN1402 CN1411 1~9 PANEL+3.3V 17~25 1~2 PANEL+3.3V TO SYSTEM CONTROL BLOCK DIAGRAM LVDS CBA UNIT TO LCD MODULE A7121BLP Power Supply Block Diagram NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. CAUTION ! BE CAREFUL. 4A/125V F601 4A/125V L601 LINE FILTER...
... 13 7 12 9 4 1 IC601 ERROR VOLTAGE DET 3 2 Q913 FEED BACK MAIN CBA Q402 SWITCHING Q403 SWITCHING Q908 SW+3.3V INV+22V BACKLIGHT-SW TO LCD BACKLIGHT BLOCK DIAGRAM TO SYSTEM CONTROL BLOCK DIAGRAM CN62 CN102 4 DTV-ON+3.3V 4 DTV-ON+3.3V 5 DTV-ON+2.5V 5 DTV-ON+2.5V 6 DTV-ON+1.8V... VT+33V DTV-ON-H P-ON-H CN1202 CN1402 CN1411 1~9 PANEL+3.3V 17~25 1~2 PANEL+3.3V TO SYSTEM CONTROL BLOCK DIAGRAM LVDS CBA UNIT TO LCD MODULE A7121BLP Power Supply Block Diagram NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. CAUTION ! BE CAREFUL. 4A/125V F601 4A/125V L601 LINE FILTER...
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MAIN CBA TO POWER SUPPLY BLOCK DIAGRAM INV+22V Q401 SW+22V Q407 SWITCHING TO SYSTEM CONTROL BLOCK DIAGRAM BACKLIGHT-ADJ Q405 SWITCHING Q404 OVER VOLTAGE PROTECTOR Q406 +10V REG. LCD Backlight Block Diagram NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Q424 SWITCHING Q421 CURRENT CONTROL SWITCH T401 3 9 6 10 1 4 5 8 2 7 CN401 1 2 Q422 OVER VOLTAGE PROTECTOR BACK LIGHT 8-7 Q464 SWITCHING Q461 CURRENT CONTROL SWITCH Q425 OVER CURERENT PROTECTOR T403 3 9 6 10 1 4 5 8 2 7 Q462 OVER VOLTAGE PROTECTOR CN403 1 2 BACK LIGHT LCD MODULE A7121BLLB
MAIN CBA TO POWER SUPPLY BLOCK DIAGRAM INV+22V Q401 SW+22V Q407 SWITCHING TO SYSTEM CONTROL BLOCK DIAGRAM BACKLIGHT-ADJ Q405 SWITCHING Q404 OVER VOLTAGE PROTECTOR Q406 +10V REG. LCD Backlight Block Diagram NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Q424 SWITCHING Q421 CURRENT CONTROL SWITCH T401 3 9 6 10 1 4 5 8 2 7 CN401 1 2 Q422 OVER VOLTAGE PROTECTOR BACK LIGHT 8-7 Q464 SWITCHING Q461 CURRENT CONTROL SWITCH Q425 OVER CURERENT PROTECTOR T403 3 9 6 10 1 4 5 8 2 7 Q462 OVER VOLTAGE PROTECTOR CN403 1 2 BACK LIGHT LCD MODULE A7121BLLB
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...+3.3V PANEL+3.3V GND GND TA(-) TA(+) GND TB(-) TB(+) GND TC(-) TC(+) GND TCLK(-) TCLK(+) GND TD(-) TD(+) GND NU BACK LIGHT BACK LIGHT LCD MODULE CN401 1 2 CN403 1 2 LVDS CBA UNIT CN1402 25 PANEL+3.3V 24 PANEL+3.3V 23 PANEL+3.3V 22 PANEL+3.3V 21 PANEL+3.3V 20 PANEL+3.3V...
...+3.3V PANEL+3.3V GND GND TA(-) TA(+) GND TB(-) TB(+) GND TC(-) TC(+) GND TCLK(-) TCLK(+) GND TD(-) TD(+) GND NU BACK LIGHT BACK LIGHT LCD MODULE CN401 1 2 CN403 1 2 LVDS CBA UNIT CN1402 25 PANEL+3.3V 24 PANEL+3.3V 23 PANEL+3.3V 22 PANEL+3.3V 21 PANEL+3.3V 20 PANEL+3.3V...
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... Slave Address 0 Input 2 A1 Slave Address 1 Input 3 A2 Slave Address 2 Input 4 GND GND 5 SDA Serial Data 6 SCL Serial Clock 7 WP Write Protect 8 VCC VCC IC1202 (LCD Drive / LCD Signal Process / TV Micro Controller) Pin No. IC PIN FUNCTION DESCRIPTIONS IC31 (IF Signal Process) Pin No.
... Slave Address 0 Input 2 A1 Slave Address 1 Input 3 A2 Slave Address 2 Input 4 GND GND 5 SDA Serial Data 6 SCL Serial Clock 7 WP Write Protect 8 VCC VCC IC1202 (LCD Drive / LCD Signal Process / TV Micro Controller) Pin No. IC PIN FUNCTION DESCRIPTIONS IC31 (IF Signal Process) Pin No.
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NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Cabinet EXPLODED VIEWS A15 A1 B14 A20 B14 Junction-B CBA B14 L6 SP802 B1 L6 A3 A7 L6 Function CBA L6 B14 SP801 B1 L6 A11 L6 IR Sensor CBA B1 Junction-A CBA L6 LCD-1 B1 L6 CL1411 L21 LVDS CBA Unit B5 L19 L6 L19 L6 L19 L19 CL1401 CL1402 L6 B13 L6 B2 L12 L21 See Electrical Parts List for parts with this mark. L21 L9 L21 L2 B14 B3 B14 L3 Main CBA L3 A9 L21 B4 B9 L21 L9 B10 A12 B8 DTV Module CBA Unit L20 A4 L3 L22 A10 L3 L5 A6 S10 A12 L20 AC601 13-1 A7121CEX
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. Cabinet EXPLODED VIEWS A15 A1 B14 A20 B14 Junction-B CBA B14 L6 SP802 B1 L6 A3 A7 L6 Function CBA L6 B14 SP801 B1 L6 A11 L6 IR Sensor CBA B1 Junction-A CBA L6 LCD-1 B1 L6 CL1411 L21 LVDS CBA Unit B5 L19 L6 L19 L6 L19 L19 CL1401 CL1402 L6 B13 L6 B2 L12 L21 See Electrical Parts List for parts with this mark. L21 L9 L21 L2 B14 B3 B14 L3 Main CBA L3 A9 L21 B4 B9 L21 L9 B10 A12 B8 DTV Module CBA Unit L20 A4 L3 L22 A10 L3 L5 A6 S10 A12 L20 AC601 13-1 A7121CEX