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BBK LH1906TSA Service Manual
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BBK LH1906TSA Service Manual

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Service Manual
(LH1906TSA LH2206TSA)
HDMI
718 ASIA HDMI
2008/7/10
- 1 -

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Summary of Contents for BBK LH1906TSA

  • Page 1 Service Manual (LH1906TSA LH2206TSA) HDMI 718 ASIA HDMI 2008/7/10 - 1 -...

  • Page 2: Table Of Contents

    Contents 1. Precautions and Safety Notices…………………………………………………………3 2. Specification…………………………………………………………………………………5 3. Function Control Description…………………………………………………………….9 4. Circuit Description…………………………………………………………………………10 5. Adjusting Procedure………………………………………………………………………15 6. Trouble Shooting Flow Chart……………………………..........21 7. Block Diagrams…………………………………………………………………………….24 8. Schematic Diagrams………………………………………………………………………25 2008/7/10 - 2 -...

  • Page 3: Precautions And Safety Notices

    1. Precautions and Safety Notices Prior to using this service manual, please ensure that you have carefully followed all the procedures outlined in the user’s manual for this product. (1) Read all of these instructions. (2) Save these instructions. (3) Follow all warnings and instructions a marked on the product. (4) Unplug this product from the wall outlet before cleaning.
  • Page 4 c. If the product has been exposed to rain or water. d. If the product does not operate normally, when the operating instructions are followed. Adjust only those controls that are covered by the operating instructions since improper adjustment of other controls may result in damage and will often require extension work by a qualified technician to restore the product to normal operation.

  • Page 5: Specification

    2.Specification Model No. 22” 19” 1440 (H) x 900(V) 1680 (H) x 1050(V) Display Pixel Pixel Pitch 0.285mm (H) x0.285mm (V) 0.282mm (H) x0.282mm (V) Active Display Area 410.4 (H) x 256.5 (V) 473.76 (H) x 296.1(V) Pixel Type R+G+B vertical stripe R+G+B vertical stripe Number of Colors 16.2M...
  • Page 6 Inputs & Connector types Signals Video Format Video Sound Outputs Main-TV PAL/NTSC PH Type None VIDEO Video + L/R Audio CVBS RCA x 1 RCA x 2 S-VIDEO S-VIDEO+ L/R Audio Mini Din 4 Pin RCA x 2 VGA+ L/R Earphone Analog RGB VGA15 Pin Earphone...
  • Page 7 640×480 59.941 31.469 25.175 SVGA 800×600 56.250 35.156 36.000 SVGA 800×600 60.317 37.879 40.000 1024×768 60.004 48.363 65.000 SXGA 1280×1024 60.020 63.981 108.000 Video & S-Video AV Timing STANDARD RESOLUTION V FREQ H FREQ NTSC 15.734 12.65 15.625 14.50 HDTV/Component AV Timing STANDARD STANDARD STANDARD...
  • Page 8 Signal Connector Pin Assignment HMDI connector is a type A receptacle for video/audio mode. 1.TMDS Data 2+ 9.TMDS Data 0- 17.CEC/GND 2.TMDS Data 2 shield 10.Clock + 18.+5V Power 3.TMDS Data 2- 11.Clock shield 19.Hot Plug Detect 4.TMDS Data 1+ 12.Clock - 5.TMDS Data 1 shield 13.CEC...

  • Page 9: Function Control Description

    3. Function Control Description Operation, Adjust and Programming 1.POWER Button Push this button to turn the unit on, and press it one more time to turn it off. 2.MENU Button Press this key to pop up the OSD menu under the current selected input mode. 3.TV/AV Button Press this key to select input sources.

  • Page 10: Circuit Description

    4. Circuit Description (1) SMPS and Voltage Regulator circuit The LCD TV power board should be designed so that AC power supply AC 100V to 240V and the input frequency within 50/60Hz can be applied. (2) Video Circuit HDMI MST3383 YPbPr LVDS MST718...
  • Page 11 (3) Audio Circuit PC AUDIO IN TDA1517 4052 SC7313 TO SPEAKER AV AUDIO IN MST3383 CS4334 SWITCH AUDIO DECODER & HDMI AMPLIFIER SWITCH TV AUDIO IN Multiplexer 4052 DESCRIPTION The UTC 4052 analog multiplexers is digitally controlled analog switch. The device feature low ON impedance and very low OFF leakage current.
  • Page 12 Stereo D/A Converter CS4334 DESCRIPTION The CS4334 family members are complete, stereo digital to analog out put systems including interpolation, 1-bit D/A conversion and out put analog filtering in an 8-pin package. The CS4334 support all major audio data interface formats, and the individual devices differ only in the supported interface format.
  • Page 13 Audio Processor SC7313 DESCRIPTION The SC7313 is a volume, tone (bass and treble), balance (left/right) and fader(front/rear) processor for quality audio applications in car radio and Hi-Fi systems. Selectable input gain and external loudness function are provided. Control is accomplished by serial I2C bus microprocessor interface. The AC signal settings is obtained by resistor networks and switches combined with operational amplifiers.
  • Page 14 Audio Amp. TDA1517 Description The TDA1517P is an integrated class-B dual output amplifier in a 18-lead dual in-line (DIP18) plastic medium power package. The device is primarily developed for multi-media applications. FEATURES *Requires very few external components *High output power *Fixed gain *Good ripple rejection *Mute/stand-by switch...

  • Page 15: Adjusting Procedure

    5. Adjusting Procedure ITEM Program Equipments Requirement Procedure & SPEC Menu 1. M/B Voltage Digital Connect with ‧ Connect Power to check if Power LED displays the confirmation Multimeter AC Adapter RED light ‧ Use voltmeter to measure output position, and check voltage CON1/Pin1-2(12V);...
  • Page 16 Cable interlaced output 6. TV FLUKE ‧ To send out the TV signal by 54200 de-interlacing 54200 ‧ To set up the Reduce of OSD to be Strong, and to other reduce snowflakes. seem rate of ‧ To set up the Reduce of OSD to be OFF, and the equipment image will display serious snowflakes.
  • Page 17 the panel degrees) 4. Ambient temperatu re: 25±5 C 5. Ambient humidity: 65±20% 10. Display Mode HDTV ‧ Select source Test TV,SCART,Video,S-Video,VGA,HDMI. S-Video HDMI ‧ Press MENU to select the Screen and Select the Cable Display Mode to be 16:9, 4:3, Zoom or Video Cable Anamorphic.
  • Page 18 output(NTSC Mode) ‧ ‧ Under S-VIDEO MODE, watch the movable circle pattern is normal without tint. The pattern is normal under 300 and 400. ‧ Under VIDEO MODE, watch the movable circle patter, static state is normal without the tint, and movement contains tint...
  • Page 19 15. NTSC/PAL Play DVD test ‧ Select source then choose VIDEO or S-VIDEO. switch S-Video disc VIDEO ‧ Sending the signal from DVD test disc (sixth Cable ESSENTIALS paragraph) Video Cable (A-1) Set DVD to interlaced output ‧ ‧ Switch DVD to output mode NTSC/PAL if there is the action of switch.
  • Page 20 ‧ Check if the action is normal. 18. Setting DPMS Power Signal wire ‧ Check OSD if the screen displays count down regulator connect picture. Chroma/6530 with ‧ Check if it turns off when the time ends off. signal. ‧ Check if LED show red color. VG828 ‧...

  • Page 21: Trouble Shooting Flow Chart

    6. Trouble Shooting Flow Chart 2008/7/10 - 21 -...
  • Page 22 2008/7/10 - 22 -...
  • Page 23 2008/7/10 - 23 -...

  • Page 24: Block Diagrams

    7. Block Diagram PANEL LVDS MST718 S-VIDEO YPbPr PM25V020 FLASH HDMI MST3383 CS4334 TDA1517 4052 SC7313 AV AUDIO IN PC AUDIO IN 2008/7/10 - 24 -...

  • Page 25: Schematic Diagrams

    MST718BV INPUT SG_PY PANEL SG_PY SG_PY SB_PB SB_PB SB_PB DV D_LIN SR_PR DVD_LIN SR_PR SR_PR DVD _RIN DVD_RIN AV_MODE AV_MODE AV_MODE VSEL VSEL VSEL AV_LIN AV_LIN A V_RIN VGA_R AV_RIN VGA_R VGA_R VGA_G VGA_G VGA_G VGA_B PCLK VGA_B VGA_B PCLK PCLK P C_LIN VGA_HS...
  • Page 26 + 5 V s b _ IN V GA _ 5 V V G A _ 5 V + 5 V s b _ IN D B 1 5 H D D 1 6 B A V 7 0 L C K 3 5 -2 1 5 R 1 5 9 V G A _ R...
  • Page 27 R120 C140 SR_PR R116 C136 +5 Vsb_IN +2.5V_718 CM1084 SB_PB VOUT 1N4001 R117 C137 MPL _2.5V 100n BM1117-2.5 1 0 0 u /16v S O Y BA[7 :0] OPL _2.5V BA[7 :0] VD C _ 2 .5V AV_ MODE D AC _ 2 .5V VGA_ VS R118 C138...
  • Page 28 PANEL_POWER J5 FH12_50S PANEL_POWER LVA0- LVA0+ LVA1- LVA1+ LVA2- LVA2+ PCLK LVACK- LVACK+ LVA3- LVA3+ LVB0- LVB0+ LVB1- LVB1+ LVB2- LVB2+ LVBCK- LVBCK+ LVB3- LVB3+ BA[7:0] A/B PORT SWAP GA[7:0] +5Vsb_IN RA[7:0] +5Vsb_IN 4.7k +12V_IN 4.7k PH-9A BLK_ON MMBT3904 4.7k IN V_ON +5Vsb_IN INV_ADJ...
  • Page 29 C 1 5 5 1 u / 1 6 v + 8 V _ L DO C 1 5 8 1 u / 1 6 v C 1 5 6 1 u / 1 6 v + 5 V _ S W C 1 5 7 1 u / 1 6 v C 1 2 5...
  • Page 30 +12V_SW 470u/16V 100n 1u/16v 1u/16v DACM_L INV1 TPA1517P 220u/16V DACM_R INV2 AP_L+ OUT1 MUTE M/SB OUT2 0-2V STANDBY AP_R+ SVRR 3.3V-6.4V MUTE 220u/16V 8.5V-18V POWERON XH-4A 100u/16V AP_L+ A UDIO_L AU DIO_R AP_R+ +12V_SW CK35-215 A UDIO_L 4.7k +5Vsb_IN AU DIO_R MUTE XH-4A 3.3k...
  • Page 31 FQ1216ME CVBS TV_CVBS AF_AUDIO +5V_TUNER_RF +5V_SW IF_AUDIO +5V_SW TV_CVBS P5VRF P5VIF FB0805 C127 220u/16V C142 C141 220u/16V 100n 10n/NC 100n +12V_SW PH-14A/NC 100u/16V_NC 100u/16V_NC JB1 JUMP +12V_SW LM7805 +5V_TUNER_RF VOUT Cultraview , Inc. CONFIDENTIAL Title 07_TUNER Size Document Number R e v CV078HS_V1 Date: Tuesday, July 24, 2007...
  • Page 32 +12V_IN +5Vsb_IN +12V_IN +5V_DVD 4.7k SYNC 47uH/3A 47uH/3A COMP DVD_ON SYNC COMP ACT4060 SK34B 470u/16V ACT4060 100n 100n 100n 10k/1% SK34B PH-2A 100n +12V_IN 10k/1% +5V_DVD +12V_IN J18 DC3AIN 20N-060H/L +5V_SW +5Vsb_IN 1u/16v PH-4A C146 For DVD Power 470u/16V 220u/16V/NC +5Vsb_IN SI9435 +3.3V_LDO...
  • Page 33 + 2 . 5 V D _ V HD_ A UP L L + 3 . 3 V D _ V HD_ P L L + 5 V s b _ IN + 2 .5 V _ 3 3 8 3 U 1 2 + 2 .

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