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22 " LCD TV
Service
Service
Service
Description
Table
Of
Contents............. . ................................ . .......1
List.... .. ..................................................2
1. Monitor Specification ................ .... ....................... . ....... 4
2. Operating Instructions............... ... ......... . ......... . ...... 5
2.1 The Use Of Remote Control................. . ....... . .......... 5
2.2 Front Panel Control Knobs. ... .. .... ... ............ . .............. 6
2 . 3
Operations... .. .......... .. ..................................... 7
2 . 4 How To Connect..................... . . . . . .......... .. ............ 12
3
Specification ............ . ......................... 14
3.1 Input Signal Connector ...... .. ... ............ ..................... 14
3.2 RGB Input Signal Timing ................. . ..................... 15
4. Mechanical Instructions .................. ... ..................... 16
5. Repair Flow Chart ........................... . ......... . .... 20
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
TABLE OF CONTENTS
Page Description
SAFETY NOTICE
1
TCL L22E75BK
Horizontal Frequency
Page
6. White Balance Luminance Adjustment ... . ...... ... .... 25
7. PCB Layout ............ . ..................... . ... .. ............ 27
7 . 1
Board ..................... ... ............................ 27
7 . 2
Power
Board ......... .. ... .. ... . ............................. 29
7.3
Board ... . .............. .. .............. . ...................... 31
7.4 Key Board ......... . ................................. ...... ...... .. 32
8. Block Diagram. ......... . ... .. ..................... . ................. 33
9. Schematic Diagram ............... ... ..................... . .. 34
Board ............... .. ... .. ........................... . . 34
9.2
Board ..... ........ ... .. .. .. ............................... 42
View ............................................... 44
11.BOM
List ........... .......................... .......................... 45
31.5KHz-80KHz
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Summary of Contents for TCL L22E75BK
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Page 1: Table Of Contents
22 ″ LCD TV TCL L22E75BK Service Service Service Horizontal Frequency 31.5KHz-80KHz TABLE OF CONTENTS Description Page Description Page Table Contents..…… ......… ..1 6. White Balance Luminance Adjustment … . …… ..25 Revision List.… ........……..2 7. - Page 2 22 ″ LCD TV TCL L22E75BK AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING...
- Page 3 TCL L22E75BK Important Safety Notice Proper service and repair is important to the safe, reliable operation of all TCL Company Equipment. The service procedures recommended by TCL and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
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Page 4: Contents
22 ″ LCD TV TCL L22E75BK -If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth damage the panel.) -
Page 5: Revision List
22 ″ LCD TV TCL L22E75BK Revision List Version Release Date Revision Instructions TPV Model Nov-08-2007 Initial Release E227A1NMBWTLNN... -
Page 6: Monitor Specification
22 ″ LCD TV TCL L22E75BK 1. Monitor Specification 22" screen Feature WXGA ( 1680x1050 ) Resolution Contrast ratio :1000:1 Wide Viewing Angle (170°H / 160°V ) Items Specification Screen Size 22” TFT -LCD Panel Aspect Ratio 16: 9 Resolution... - Page 7 22 ″ LCD TV TCL L22E75BK Weight (net) Kg (w/o Accessories) 6.3 Kg...
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Page 8: Operating Instructions
22 ″ LCD TV TCL L22E75BK 2. Operations Instructions 2.1 The Use Of Remote Control POWER MUTE Press to turn on/off the TV. The Temporarily interrupt the sound or TV will not completely shutdown, restore it. it stays in an energy saving standby mode. -
Page 9: Front Panel Control Knobs
22 ″ LCD TV TCL L22E75BK 2.2 Front Panel Control Knobs VOL▲▼①②: To adjust the volume. Under Menu status these 2 buttons can be used to confirm selected options. CH ▲▼③④: To switch channels. Under Menu status these 2 buttons can be used to access selected options. -
Page 10: Osd Operations
22 ″ LCD TV TCL L22E75BK 2.3 OSD Operations To use the menus 1. Press the Menu button to display or exit the Main Menu. 2. Use the V-, V+ to select the function to be adjusted. 3. Use the P- ,P+ to enter into the submenu, or to enable or adjust the selected function. - Page 11 22 ″ LCD TV TCL L22E75BK Ⅱ.Picture 1. Adjustable Brightness and Contrast range is from 0~100. Screen brightness can be set by adjusting the Brightness or Contrast. 2. Hue: Adjustable range is from 0~100. Adjusting this option will change the screen color. (when the color system is NTSC) 3.
- Page 12 22 ″ LCD TV TCL L22E75BK 5. AVC: Select On/Off to prevent the rapid change of volume while switching modes or channels. 6. MEMORY REACLL: To reset the Sound settings back to the factory default settings. Ⅳ. Geometry settings（under PC mode）...
- Page 13 22 ″ LCD TV TCL L22E75BK Ⅴ. Advanced Settings (Under TV, AV, S-video or YPbPr modes) 1． NR: Weak, Middle, Strong, Off .Choose to clear serious noise problems from the screen. Please refer to the actual screen when making your selection. It is recommended not to change settings when noise problems are minor.
- Page 14 22 ″ LCD TV TCL L22E75BK 7． Blue Screen: If the blue screen option is set to "On", the TV will display a default blue screen when there is no input TV signal .The system default is “On” to communicate to the user that there is no input signal .
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Page 15: How To Connect
22 ″ LCD TV TCL L22E75BK 2.4 How To Connect Remove the backboard of the TV as shown in the image. Place the TV on a table with the LCD screen facing down to facilitate easy connection with the external equipment. - Page 16 22 ″ LCD TV TCL L22E75BK Note: For the connection between the PC and the TV, (see below) Note：When there is no input VGA signal, the unit will automatically switch to standby mode after 30 minute. Antenna input: Antenna or CATV cable input. This portal accepts a 75Ω coaxial cable for the input signal. Please refer to the following image: Note: When there is no TV signal input, the unit will automatically switch to standby mode after 15 minutes.
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Page 17: Input/Output
22 ″ LCD TV TCL L22E75BK 3. Input/Output Specification 3.1 Input Signal connector This procedure gives you instructions for installing and using the LCD TV display. Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. -
Page 18: Rgb Input Signal Timing
22 ″ LCD TV TCL L22E75BK contrast to the most pleasing display, or press auto-adjust to get the best picture-quality. This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal cable to the PC. -
Page 19: Mechanical Instructions
22 ″ LCD TV TCL L22E75BK 4. Mechanical Instructions Step Figure Description Lay the LCD- Preparatio TV on a flat, soft and clean surface. Remove the hinge cover and the screws on the Remove stand to the base remove the... - Page 20 22 ″ LCD TV TCL L22E75BK Remove the screws mark Remove in red to the back remove the cover back cover. Remove the Remove six screws to hinge remove the plate hinge plate Remove Remove the Iron screws Plate...
- Page 21 22 ″ LCD TV TCL L22E75BK 1.Remove the five screws marked in red to remove the power board. 2. Remove the five screws Remove marked in red Main Board to remove the and Power main board Board 3.Disconnect the connector...
- Page 22 22 ″ LCD TV TCL L22E75BK Remove the Remove screws to the Bezel remove the bezel Remove the Remove four screws to The Main remove the Frame. main frame. Panel...
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Page 23: Repair Flow Chart
22 ″ LCD TV TCL L22E75BK 5. Repair Flow Chart 5.1 No Power (No LED indicator) Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901... - Page 24 22 ″ LCD TV TCL L22E75BK 5.2 Can not start (LED indicator yellow) Repair the key board Check key board Replace U701,U702 Check U701，U702 Replace U400 Check U400 Check I C communication...
- Page 25 22 ″ LCD TV TCL L22E75BK 5.3 No display (LED indicator green) Check F902=12V Check F902/ZD920/F904/D906/C918 Check ON/OFF signal Check Interface board or main board Check IC801 PIN5=5V Change on/off circuit Q802/Q803/Q804/ZD803 Check IC801 PIN11/PIN12/PIN19/PIN20 have PWM wave Change IC801...
- Page 26 22 ″ LCD TV TCL L22E75BK 5.4 Abnormal display Reset source Check the source Check signal filter circuit Replace the filter or resistance AV, S- video，Component RF signal ，HDMI ,PC Signal Check TV system setup Check input Check U400 Check Tuner...
- Page 27 19 ” LCD TV TCL L 19E75A 5.5 Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board Normally?
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Page 28: White Balance Luminance Adjustment
22 ″ LCD TV TCL L22E75BK 6. White Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Before started adjust white balance ,please setting the Chroma-7120 MEM. Please select channel 07 to adjust the white balance. - Page 29 22 ″ LCD TV TCL L22E75BK HDTV/HDMI Mode (A). Adjust 6500K color-temperature: 1. Switch the chroma-7120 to RGB-mode (with press “MODE” button) 2. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120) 3. The LCD-indicator on chroma-7120 will show x =313, y =329, Y>168cd/m2 4.
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Page 30: Pcb Layout
22 ″ LCD TV TCL L22E75BK 7. PCB Layout 7.1 Main Board 715T2509-2... - Page 31 22 ″ LCD TV TCL L22E75BK...
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Page 32: Board
22 ″ LCD TV TCL L22E75BK 7.2 Power Board 715T2210-1-AO... - Page 33 22 ″ LCD TV TCL L22E75BK...
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Page 34: Ir Board
22 ″ LCD TV TCL L22E75BK 7.3 IR Board 715T2499-1... -
Page 35: Key Board
22 ″ LCD TV TCL L22E75BK 7.4 Key Board 715T2501-1... -
Page 36: Block Diagram
22 ’’ LCD TV TCL L22E75BK 8. Block Diagram... -
Page 37: Schematic Diagram
22 ’’ LCD TV TCL L22E75BK 9. Schematic Diagram 9.1 Main Board 715T2509-2 P o w e r S o u r c e P a n e l P o w e r + 1 2 V _ P W R... - Page 38 22 ’’ LCD TV TCL L22E75BK V c c 3 . 3 f o r M S T 9 E 1 9 A V c c 1 . 8 f o r M S T 9 E 1 9 A...
- Page 39 22 ’’ LCD TV TCL L22E75BK L o c a t i o n N e a r I C P i n . + 3 . 3 V R 4 0 1 A M P - R o u t 1 0 0 Ω...
- Page 40 22 ’’ LCD TV TCL L22E75BK V G A / 5 V Z D 1 2 3 P 1 0 0 U D Z S 5 . 6 B D B 1 5 R 1 7 0 1 0 0 Ω 1 / 1 0 W...
- Page 41 22 ’’ LCD TV TCL L22E75BK 5 V s t b C 5 0 8 C 5 0 7 C 5 0 6 C 5 0 5 D 5 0 0 D 5 0 1 D 5 0 2 D 5 0 3...
- Page 42 22 ’’ LCD TV TCL L22E75BK H D A u d i o - R I n p u t S - V i d e o / H D A u d i o - L I n p u t R 1 4 5 1 0 Ω...
- Page 43 22 ’’ LCD TV TCL L22E75BK V i d e o M o d u l e ( T u n e r + D e m o d u l a t o r ) O p t i o n...
- Page 44 22 ’’ LCD TV TCL L22E75BK A u d i o P r e - A m p l i f i e r A u d i o P o w e r A m p l i f i e r...
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Page 45: Board
22 ’’ LCD TV TCL L22E75BK 9.2 Power Board 715T2210-1-AO R 9 2 1 C 9 1 3 1 0 0 1 / 4 W F 9 0 2 F U S E R 9 2 2 + 1 2 V 1 0 0 ... - Page 46 22 ’’ LCD TV TCL L22E75BK C 8 0 3 C N 8 0 1 4 7 0 u F / 3 5 V C 8 0 2 D 8 0 1 C 8 0 6 V 1 2 A...
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Page 47: View
22 ’’ LCD TV TCL L22E75BK 10. Exploded View... -
Page 48: Power 10.Exploded 11.
WIRE HARNESS 2P 500MM 095T8014 3X568 WIRE HARNESS 3P 450MM 095T8014 7D524 WIRE HARNESS 7P-5P(400MM)+3P(450MM) 095T8018 3D685 LVDS CABLE 30P-24P 160MM 098TRACG3NETLA REMOTE SENEASY FOR TCL 0D1T 930 6120 SCREW 0D1T 930 6120 SCREW 0M1T 130 8120 SCREW 0M1T1140 6120... - Page 49 22 ’’ LCD TV TCL L22E75BK 705TQ734407 BEZEL ASS`Y A34T0305 RSB2LA030 BEZEL TV22W-7A2 KEPF7QB3 KEY BOARD CN01 033T3802 3B YH CONN.3P 2.0 DIP SW01 077T 600 4 HJ TACT SW TSPB-1L SW05 077T 600 4 HJ TACT SW TSPB-1L SW06...
- Page 50 22 ’’ LCD TV TCL L22E75BK C612 067T 305470 3T EC 105 47UF M 16V C135 067T 305470 3T EC 105 47UF M 16V C400 067T 305470 3T EC 105 47UF M 16V C700 067T 305471 3T 470UF +-20% 16V...
- Page 51 22 ’’ LCD TV TCL L22E75BK R502 061T0603100 CHIP 10OHM 1/16W R503 061T0603100 CHIP 10OHM 1/16W R504 061T0603100 CHIP 10OHM 1/16W R505 061T0603100 CHIP 10OHM 1/16W R506 061T0603100 CHIP 10OHM 1/16W R507 061T0603100 CHIP 10OHM 1/16W R437 061T0603100 CHIP 10OHM 1/16W...
- Page 52 22 ’’ LCD TV TCL L22E75BK R165 061T0603103 CHIP 10KOHM 1/16W R163 061T0603103 CHIP 10KOHM 1/16W R140 061T0603103 CHIP 10KOHM 1/16W R139 061T0603103 CHIP 10KOHM 1/16W R756 061T0603103 CHIP 10KOHM 1/16W R755 061T0603103 CHIP 10KOHM 1/16W R752 061T0603103 CHIP 10KOHM 1/16W...
- Page 53 22 ’’ LCD TV TCL L22E75BK R714 061T0603472 CHIP 4.7KOHM 1/16W R712 061T0603472 CHIP 4.7KOHM 1/16W R710 061T0603472 CHIP 4.7KOHM 1/16W R709 061T0603472 CHIP 4.7KOHM 1/16W R708 061T0603472 CHIP 4.7KOHM 1/16W R705 061T0603472 CHIP 4.7KOHM 1/16W R704 061T0603472 CHIP 4.7KOHM 1/16W...
- Page 54 22 ’’ LCD TV TCL L22E75BK C763 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C764 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C766 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R C768 065T0402104 12 CAP CHIP 0402 0.1UF 16V X7R...
- Page 55 22 ’’ LCD TV TCL L22E75BK C760 065T0402332 32 CHIP 3300PF 50V X7R C159 065T0402473 12 MLCC 0402 47NF K 16V X7R C164 065T0402473 12 MLCC 0402 47NF K 16V X7R C165 065T0402473 12 MLCC 0402 47NF K 16V X7R...
- Page 56 22 ’’ LCD TV TCL L22E75BK FB601 071T 57G301 EA CHIP BEAD FB705 071T 57G301 EA CHIP BEAD FB706 071T 57G301 EA CHIP BEAD FB707 071T 57G301 EA CHIP BEAD FB708 071T 57G301 EA CHIP BEAD FB709 071T 57G301 EA...
- Page 57 22 ’’ LCD TV TCL L22E75BK 061T0603821 RST CHIPR 820 OHM +-5% 1/10W 061T0603821 RST CHIPR 820 OHM +-5% 1/10W 065T0603101 31 CHIP 100PF 50V NPO 065T0603104 12 MLCC 0603 0.1UF K 16V X7R 065T0603104 12 MLCC 0603 0.1UF K 16V X7R 065T0603104 12 MLCC 0603 0.1UF K 16V X7R...
- Page 58 22 ’’ LCD TV TCL L22E75BK 0M1T1730 8120 SCREW 0M1T1730 10120 SCREW Q90T0122A01 HEAT SINK 705TQCK0 93005 D904 ASS'Y 051T 200 1 OIL FOR DISAPPEAR D904 093T 60278 DIODE SP1060 10A/60V_ITO-220 0M1T1730 8120 SCREW Q90T0120A01 HEAT SINK 705TQCK0 93006 D906 ASS'Y...
- Page 59 22 ’’ LCD TV TCL L22E75BK R916 061T0805472 RST CHIPR 4.7 KOHM +-5% 1/8W R931 061T0805822 RST CHIPR 8.2KOHM +-5% 1/8W F902 061T1206000 RST CHIPR 0 OHM +-5% 1/4W F903 061T1206000 RST CHIPR 0 OHM +-5% 1/4W F904 061T1206000 RST CHIPR 0 OHM +-5% 1/4W...
- Page 60 22 ’’ LCD TV TCL L22E75BK C818 065T0603105 12 CHIP 1UF 16V X7R C825 065T0603105 12 CHIP 1UF 16V X7R C816 065T0603224 22 CHIP CAP 0.22UF 25V X7 C810 065T0603333 32 CHIP 0.033UF 50V X7R C840 065T0603333 32 CHIP 0.033UF 50V X7R...
- Page 61 22 ’’ LCD TV TCL L22E75BK T901 006T 31502 1.5MM RIVET IC902 056T 158 7 AP431V TO-92 C906 065T 2K152 1T6213 CAP CER 1500PF K 2KV C908 067T 2152207NT KY50VB22M-TP5 5*11 F901 084T 55 5 FUSE 2.50A 250V D902 093T 6038P52T...
- Page 62 22 ’’ LCD TV TCL L22E75BK Q40T0001654 4A LABEL FOR CARTON Q40T000265430A I/O LABEL Q41T780065435A WARRANTY CARD Q44TC014 3 Q44TC014654 2A CARTON Q44TC014BRO 1 PAPER BLOCK Q44TC033102 Q44TC033202 Q45T 99609 10 R EPE COVER Q45T 99609 37 R EPE COVER...
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