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Haier L22B1120 Service Manual

Other manuals for L22B1120: Owner's Manual, Energy Manual

Summary of L22B1120

  • Page 1

    Service manual lcd tv model no. L22b1120 chassis msd318 this service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to s...

  • Page 2: 1-1. Table of Contents

    1-1. Table of contents 1. General information........................................................................... 1-1. Table of contents 1-3. Important notice 1 chapter 1: general information 1 3 1-2. General guidelines 1-4. How to read this service manual 3 6 6shfl¿fdwlrqv......................

  • Page 3: - 02 -

    - 02 - 9. Trouble-shooting………….............................................................. 43 9-1. Simple check 43 9-2. Main board failure check 9-3. Panel failure 44 53.

  • Page 4: 1-2. General Guidelines

    1-2. General guidelines when servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are pr...

  • Page 5: - 04 -

    1-3-6 safety check after repairment - 04 - &rq¿upwkdwwkhvfuhzvsduwvdqgzlulqjzklfkzhuhuhpryhglqrughuwrvhuylfhduhsxw in the original positions, or whether there are the positions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or ext...

  • Page 6: - 05 -

    - 05 - electrostatically sensitive (es) devices 1-3-7. Ordering spare parts 1. Immediately before handling any semiconductor component or semiconductor- equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially ...

  • Page 7: - 06 -

    - 06 - 1-3-8. Photo used in this manual the illustration and photos used in this manual may not base on the final design of products, which may differ from your products in some way. 1-4. How to read this service manual using icons: ,frqvduhxvhgwrdwwudfwwkhdwwhqwlrqriwkhuhdghuwrvshfl¿flqirupdwlrq7kh...

  • Page 8: - 07 -

    Service manual model no.: - 07 - 2. Speci ¿cations model l22b1120 screen size 21.5 inch aspect ratio 16:9 resolution 1366*768 response time (ms) 6.5 (gray to gray) angel of view +88/-88(h), +88/-88 (v) typ. Color display 16777216 no. Of preset channels cable :1-135/ air: 2-69(atv&dtv) osd language e...

  • Page 9: - 08 -

    - 08 - 3. Location of controls and components 3-1 board location 3-2 main board no. Description a board main board b board power board a board b board.

  • Page 10: - 09 -

    - 09 - 3-2-1 function description: main board process signal which i ncept from exterior equipment t hen translate into signal that panel can display. 3-2-2 connector defnition main board connector power connectors (j15 ˈj16) j16 j15 pin number signal name pin number signal name 1 +5v 1 gnd gnd 3 di...

  • Page 11: - 10 -

    - 10 - pin number signal name description 1 led_r lamp red 2 led_g lamp green 3 4 ir remote control 5 gnd gnd 6 5v power for remote pin number signal name description 1 key1 2 key0 3 gnd remote connector (j6) keypad and connector (j7).

  • Page 12: 3-3. Power Board

    3-3. Power board 3-3-1 function description: supply power for main board, panel. &rqqhfwrugh¿qlwlrq - 11 - speaker connector j11 pin number signal named escription + k p s r + k p s r 1 - k p s r - k p s r 2 - k p s l - k p s l 3 + k p s l + k p s l 4 cn2 pin number signal name 9 gnd gnd gnd gnd gnd...

  • Page 13: 3-4. Lcd Panel

    3-4. Lcd panel - 12 - claa216wa01.

  • Page 14: - 13 -

    Cn1 - 13 - 3-4-1 function description: display the signal. &rqqhfwrugh¿qlwlrq pin no. Remark function 1 rxo0- minus signal of odd channel 0(lvds) 2 rxo0+ plus signal of odd channel 0(lvds) 3 rxo1- minus signal of odd channel 1(lvds) 4 rxo1+ plus signal of odd channel 1(lvds) 5 rxo2- minus signal of ...

  • Page 15: 4. Disassemble and Assemble

    4. Disassemble and assemble 4-1 remove the pedestal 4-3. Remove the adhesive tape (the location of the adhesive tape as follows) remove the adhesive tape indicated on the ¿jxuhderyh faces upward uhdufryhulqglfdwhgzlwkż 4-2remove the back cover ¿jxuhderyhe\ż unit. - 14 -.

  • Page 16: - 15 -

    4-3 remove the terminal bracket wkh¿jxuhderyhe\ż 4-4 remove the power module ¿jxuhderyhe\ż 4-5 remove the main board 5hpryh wkh wzr vfuhz lqglfdwhg rqwkh¿jxuhderyhe\ż 'lvfrqqhfwhg wkh frxsohu j17 j6 j7 j9 j15 j16 j11 - 15 -.

  • Page 17: - 16 -

    4-6 remove the speaker take out the speaker 4-7 remove the remote control remove the screw, take out the remote control board - 16 - 5. Installation instructions 5-1 external equipment connections accessories remote control user guide battery 1 enter return display 2 3 4 5 6 7 8 9 0 + ch _ + _ vol s...

  • Page 18: - 17 -

    - 17 -.

  • Page 19: - 18 -

    - 18 - to audio outputs video equipment to video output yellow (video) white(audio l) red(audio r or pr) y w r w r w r w r g b r g r b blue(pb) green(y) b g video equipment with ypbpr w r hdmi ac input 100-240v~50/60hz hdmi 1 hdmi 2 l r av pr y pb component input audio input headphone pc audio input...

  • Page 20: - 19 -

    - 19 - ac input 100-240v~50/60hz hdmi 1 hdmi 2 l r av pr y pb component input audio input headphone pc audio input rf input vga input coaxial.

  • Page 21: 5-2 Hdmi Connections

    5-2 hdmi connections when the source device supports hdm how to connect 1. Connect the source device to hdmi port of this tv with an hdmi cable(not supplied with this product). 2. No separated audio connection is necessary. How to use if the source device supports auto hdmi function, the output reso...

  • Page 22: - 21 -

    Cable sample hdmi cable (not supplied with the product) hdmi to dvi cable ( not supplied with the product) analog audio cable (stereo to rca type) (not supplied with the product) connecting headphones you can connect a set of headphones to your set if you wish to watch a tv programmer without distur...

  • Page 23: - 22 -

    Power source to use ac power source use the ac polarized line cord provided for operation on ac. Insert the ac cord plug into a standard polarized ac outlet. Notes: Ŷ1hyhufrqqhfwwkh$&olqhfrugsoxjwrrwkhuwkdqwkhvshfl¿hgyrowdjh use the attached power cord only. Ŷ,iwkhsrodul]hg$&fruggrhvqrw¿wlqwrdqrqsro...

  • Page 24: 6. Operation Instructions

    6. Operation instructions basal information 6-1 front panel controls 6.2 back panel controls - 23 - ac input 100-240v~50/60hz hdmi 1 hdmi 2 l r av pr y pb component input audio input headphone pc audio input rf input vga input coaxial 1. Source: display the input source menu. 2. Menu: display main m...

  • Page 25: - 24 -

    6-3 setting up your remote control - 24 -.

  • Page 26: 7. Electrical Parts

    7. Electrical parts 7-1. Block diagram - 25 - amp headphone coaxial 1 2 msd318qt main ic.

  • Page 27: - 26 -

    7-2. Circuit diagram - 26 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a ipod_in_l reset_cp ipod_cvbs ipod_y ipod_in_r ipod_y ipod_c ipod_in_l ipod_cvbs mode0 mode1 reset_cp +3.3v ipod_in_r ipod_c +5v +3.3v +3.3v +3.3v i2c-sda 4 i2c-scl 4 ipod_rx 4 ipod_tx 4 ipod_detect 4 ipod_cvbs_in 4 ipod_sv-yin 4 ipod_sv...

  • Page 28: - 27 -

    - 27 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a t_sda if_agc aif if- if+ t_scl t_rf_agc rf_agc t_rf_agc sifp_out+ vifp_out ifagc rf_agc vifn_out sifp_out- t_sda 3.3vcc_t t_scl 3.3vcc_tm ifagc t_rf_agc ssda sscl ifagc aif ifs1 ifs2 sifp_out+ if+ if- vifn_out vifp_out sifp_out- ifs1 ifs2 rf_agc_sel vifn_ou...

  • Page 29: - 28 -

    - 28 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a amp-mute mute sd volume fade +12v rout+rout+ amp-mute vcc-op2 al+ pwd_mt pwd_mt vcc-op2 amp_rin amp_lin ar+ amp_rin ph_l amp_lin ph_r mutedd rout+rout+ pwd_mt mute_pam rout- lout- mute rout- ar+ al+ rout+ lout+ lout# rout# mute rout# svrr lout# mutedd amp-m...

  • Page 30: - 29 -

    - 29 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a panel-on/off# lcd_op panel-on/off# r1_rxoc+ g3_rxe0+ g1_rxe1+ b7_rxe2+ b5_rxec+ b3_rxe3+ r0_rxoc- b6_rxe2- b2_rxe3- b4_rxec- g0_rxe1- g2_rxe0- usb_detec1 usb0_dm usb0_dp usb_detec1 on_usb1 panel-on/off# overdriver overdriver +5v +12v vcc-panel vcc-panel vcc...

  • Page 31: - 30 -

    - 30 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a ma_a9 ma_a5 ma_a10 ma_a1 ma_a12 ma_a7 ma_a3 miua_a5 miua_a10 miua_a1 miua_a7 a_mverf ma_a11 miua_a11 miua_a8 miua_a4 miua_a6 ma_a4 ma_a6 ma_a8 miua_dqm0 miua_dqm1 miua_a[13:0] miua_dq[15:0] miua_wez miua_mclk miua_mclkz miua_mcke miua_casz miua_ba0 miua_ras...

  • Page 32: - 31 -

    - 31 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a system-rst auvrm auvrp auvag pwm0 hdmi0-hpdin hdmi0-sda hdmi0-scl sif_in- sif_in+ hdmi-cec hdmi0-clkn hdmi0-rx1p hdmi0-rx2n hdmi0-rx1n hdmi0-rx2p hdmi0-rx0n hdmi0-rx0p hdmi0-clkp xtali usb0_dp usb0_dm xtalo sp i_csn_1 sp_sd o spi-sd o spi-c s0n spi-sc k spi...

  • Page 33: - 32 -

    - 32 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a sda_0 scl_0 hotplug_0# hdmi_cec hotplug_1# hdmi0-rx0p sda_0 scl_0 hdmi0/5v hotplug_0# hdmi_cec hdmi2/5v scl_2 sda_2 hdmi_cec scl_2 scl_1 sda_2 sda_1 hdmi_cec hdmi-cec scl_0 sda_0 hdmi0-scl hdmi0-sda scl_1 sda_1 hdmi1-scl hdmi1-sda hdmi0-rx2p hdmi0-rx2n hdmi...

  • Page 34: - 33 -

    - 33 - 5 5 4 4 3 3 2 2 1 1 d d c c b b a a vga_rin vga_lin rear_av vcom0 ypbpr_gin+ ypbpr_rin+ ypbpr_bin+ ypbpr_bin- ypbpr_gin- ypbpr_rin- ypbpr_sog line_in_0l line_in_1r line_in_1l line_in_0r dvd_in_l dvd_in_r ddc_scl_d ddc_scl_d ddc_sda_d ddc_sda_d spdif_out spdifout dvd_on/off dvd_ar dvd_al irin ...

  • Page 35: - 34 -

    - 34 - 5 4 3 2 1 d d c c b b vga_rin vga_lin rear_av vcom0 ypbpr_gin+ ypbpr_rin+ ypbpr_bin+ ypbpr_bin- ypbpr_gin- ypbpr_rin- ypbpr_sog line_in_0l line_in_1r line_in_1l line_in_0r dvd_in_l dvd_in_r ddc_scl_d ddc_scl_d ddc_sda_d ddc_sda_d dvd_on/off dvd_ar dvd_al irin dvd_cvbs hp_det ph_l ph_r side-au...

  • Page 36: - 35 -

    - 35 - 7-3 .Wiring connection diagram 1 2 4 5 3 6 7 no.N ame 1 2 3 4 5 6 7 connection wire(for speaker) connection wire(for remote) connection wire(control for backlight on/off) lvds wire connection wire(power for mainboard) connection wire(control for usb input ) connection wire(for keyboard).

  • Page 37: - 36 -

    8. Tv operation - 36 -.

  • Page 38: - 37 -

    - 37 -.

  • Page 39: - 38 -

    - 38 - press enter key to select.

  • Page 40: - 39 -

    - 39 - press enter key to select.

  • Page 41: - 40 -

    - 40 -.

  • Page 42: - 41 -

    - 41 - 8.1 how to enter into the factory model 1. You can press "source-2-5-8-0" to go into factory setting. Presse the key "exit" to shut the factory setting. Content: 1: adc setting: set adc value of yuv,vga. It can also be auto-set. Adopt 100% color bar to yuv and checkerboard signal to vga. 2:co...

  • Page 43: - 42 -

    - 42 - 2.2,then input usb, press power. 2.3 then press "source-2-5-8-0" and choose "sw upgrade",and then press "enter". 2.4,now you should choose "yes" and then press "enter" tv begin to update.You should remove the usb memory and reset tv after update. Note: when upgrade on the process, please don’...

  • Page 44: - 43-

    - 43- 9. Trouble shooting 9-1. Simple check.

  • Page 45: - 44 -

    - 44 - 9-2. Main board failure check service guide 1) black creen 2) white screen 6 j15 j15 2 11 2 on vcc pins of j9 check if q3 1 is working check if j9 is signal on j9 check q2,q 3 and the 5 is power lcd normal?.

  • Page 46: - 45-

    - 45- 3) panel display abnormally connector j9 is at normal level.

  • Page 47: - 46-

    - 46- 4) no sound no sound y n check if there is sound input signal reset volume y y check the input source n check if the volume control is at 0 level or muted check the speakers y n check if there is output at j11 check if there is +12v input at pin28 of u19 check if the power supply system is dam...

  • Page 48: - 47 -

    - 47 - 5）tv failure tv no channel check if there is rf signal input y check if there is +5v at pin2 of u24 n y y y n check the power supply circuit to this pin check if there is intermediate frequency signal output at pin12 of u24 check if there is i2c signal at pin6 & pin7 of tuner1 check the i2c c...

  • Page 49: - 48 -

    6) hdmi no picture or picture abnormal if cn10 is r111,r112,r113,r114,r116, r117,r100,r105,r106,r108. Q11,q12 - 48 - 2 r301,r310,r319,r317, r351,r338,r343 q305.

  • Page 50: - 49 -

    - 49 - 7) pc no picture or picture abnormal.

  • Page 51: - 50 -

    - 50 - 8) ypbpr, av no picture or picture abnormal check y.

  • Page 52: - 51 -

    - 51 - failure mode part name description phenomena failure cause circuit white screen b/l normal, only white screen display m a y b e c a u s e d by surge current and eds black screen b/l normal, only black screen display fiicker crosstalk lcd vcom imbalance abnormal color only color abormal capaci...

  • Page 53: - 52 -

    - 52 - part name description phenomena failure cause p a n e l o r polarlzer dot defect bright dot dark dot in pannel i n c o m i n g i n s p e c t i o n standard polarizer bubble bladder in polarizer bladder between polarizer and top glass polarizer scratch polarizer scratch tine or rigidity arose ...

  • Page 54: - 53 -

    - 53 - 9-3. Pannel failure failure mode part name description phenomena failure cause tcp v b/d vertical bar block defect :tcp cracking or cracking dim or l/d :tcp sunken :tcp lead cracking :acf bonding short :awful environment and something electric enter into lcd :mis-align between tcp and panel :...

  • Page 55: - 54 -

    - 54 - failure mode part name description phenomena failure cause mechanlcal nolse when turn panel,appear cacophony caused b y m e c h a n i c a noise of backlight unit ripple connectric circle causeed by between mechanism and pannel b/l off b/l lose action *connect badness between wire and electrod...

  • Page 56: - 55 -

    - 55 - failure mode part name description phenomena failure cause mechanlcal or b/ l light leakage brightness at bottom of lcm brighter than normal b/l unit badness uniformity b / l b r i g h t n e s s asymmetric sheet in b/l unit is uneven mount hole lack screw or screw damage *lack screw screw dam...

  • Page 57: Sincere Forever

    Sincere forever haier group haier industrial park, no.1, haier road 266101, qingdao, china http://www.Haier.Com printed in china.