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TCL LCD32M61S3-MS19 Service Manual

Summary of LCD32M61S3-MS19

  • Page 1

    Tcl service manual lcd32m61s3-ms19 1. Chapter i specification ……………………………………………………… 6 2. Chaper ii chassis introduction …………………………………… …… 10 part i mcu working conditions …………………………………………… 12 part ii reset section ………………………………………………………… 12 part iii tuner section ………………………………………………………… 13 part iv aud...

  • Page 2: Caution

    Warning: to reduce risk of fire or electric shock, do not expose this appliance to rain or moisture. Ca ution: to reduce the risk of electrical shock, do not remove cover (or back). No user serviceable par ts inside. Refer ser vicing to qualified service personnel. The lighting flash with arrowhead ...

  • Page 3: For Your Personal Safety

    3 for your personal safety 1. When the power cord or plug is damaged or frayed, unplug this television set from the wall outlet and refer servicing to qualified service personnel. 2. Do not overload wall outlets and extension cords as this can result in fire or electric shock. 3. Do not allow anythi...

  • Page 4

    4 protection and location of your set 11. Do not use this television set near water ... For example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc. Never expose the set to rain or water. If the set has been exposed to rain or water, unplug th...

  • Page 5: Operation Of Your Set

    Operation of your set 18. This television set should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply at your home, consult your television dealer or local power company. For television sets designed to operate from batter...

  • Page 6

    Specification items description remarks m ode l id model l32m61s3 remote control picture rc type philips rc1113339 ge ne ra l basic info. ＋ panel size （ inch ） 32" ＋ panel supplier cmo ＋ aspect ratio 16:9 ＋ chassis name ms19 ＋ solution mst9e19a ＋ market em ＋ certification cb panel specification ＋ mo...

  • Page 7

    - mode channel list ＋ tv systems ntsc-m,pal m,pal n ＋ if freq. 45.75mhz ＋ freq. Bands vhf-l vhf-h,uhf,hyperband ＋ twin tuner --- ＋ av system pal,ntsc pi c tur e picture-processing(tv/video) ＋ scan standard progresive 60hz ＋ scaler mode 16:9, 4:3, zoom, cinerama ＋ comb filter 2d ＋ black strech, blue ...

  • Page 8

    Ot he r func ti ons ＋ card reader --- ＋ dvd combo --- ＋ support usb connection --- ＋ built-in dtv reception and system --- please add other items referring to factual situation operation control ＋ clock/timer function 24h timer;turn on/offf;sleep timer ＋ lock ＋ osd features osd position adjustable, ...

  • Page 9

    Conf igur a tion&ar twor k ＋ features flat (no arc) ＋ speaker assemble mode integrated ＋ speaker grille original holes in f.Cab ＋ front cabinet - material and color hips black a6881 ＋ rear cabinet - material and color hips black a8252 ＋ keyboard position middle on top of the front panel ＋ tuner deta...

  • Page 10

    Chapter ii chassis introduction lcd32e62s3/lcdm61s3/lcdm71s3 adopted mstar integrated 1-chipset solution ms19 (mst9e19a).It has characteristics as following, ¾ mstarace-3 (3rd generation advanced color engine) automatic picture/color processor: . Brilliant and fresh color . Intensified contrast and ...

  • Page 11

    Av1/av3 through socket p14 input pin45/pin47 of u8, s-video input through socket p15 input pin42/pin43/pin44 of u8. Ycbcr video signal input through socket p16 input. Iii.Hdmi video signal input through socket p12 input pin1-pin15 of u8. Iv.Vga input through socket p13 input pin16-pin28 of u8. V. Au...

  • Page 12

    Representative circuitry introduction part i mcu working conditions i. Power supply showing as following figure, ii. Reset circuitry working normal. Iii. Crystal working normal iv. Scl and sda working normal and so on. Part ii. Reset section each time turn on the tv, after power supply loading, the ...

  • Page 13

    Part iii. Tuner section tuner receives the rf signal, and after the circuitry inside it deal with, and get the cvbs signal sends to pin49/50 of mst ic. The another signal path is sif signal out from pin7 of tuner and sends to pin 54/55 of mst ic. The detail signal following process please refer to c...

  • Page 14

    Part iv audio amplifier and mute control the audio signal after mst ic decoder and get out from pin74/75 of mst ic, and through integral circuitry (r33,r38,c76 and r45,r50,c82) send to pin4/12 of audio power amplifier u19 to drive speaker. Part v av output audio amplifier section the phone audio sig...

  • Page 15

    Part vi hdmi edid introduction extended display identification data (edid) is a data structure provided by a computer display to describe its capabilities to a graphics card. It is what enables a modern personal computer to know what kind of monitor is connected. Edid is defined by a standard publis...

  • Page 16

    Vga edid or ddc.

  • Page 17

    Part vii hdcp section high-bandwidth digital content protection (hdcp) is a form of digital rights management (drm) developed by intel corporation to control digital audio and video content as it travels across digital visual interface (dvi) or high-definition multimedia interface (hdmi) connections...

  • Page 18

    Part viii eeprom for software it adopts winbond company’s w25x40 flash which has 4m-bit/526 bytes and 2048pages.It is used for storage the main system software. The devices operate on a single 2.7v to 3.6v power supply with current consumption as low as 5ma active and 1ua for power-down. 。 eeprom fo...

  • Page 19

    Part ix panel on/off control section while the tv is turn on, the tv is standby situation. While command turn on is send out, 5v voltage will through regulator and equal get 3.3v voltage or 1.8v voltage supply for u8. After reset and crystal y1 working, the main system software will be loaded, the p...

  • Page 20

    Chapter iii ic sepecifications part i specification of mst9e19a part ii specification of tda7266.

  • Page 21

    Mst9e19a sxga/wxga+ lcd tv controller with video decoder & 10-bit dual lvds transmitter preliminary data sheet version 0.1 version 0.1 - 1 - 5/19/2006 copyright © 2006 mstar semiconductor, inc. All rights reserved. Features Ÿ single display lcd tv controller with pc & multimedia display functions Ÿ ...

  • Page 22

    Mst9e19a sxga/wxga+ lcd tv controller with video decoder & 10-bit dual lvds transmitter preliminary data sheet version 0.1 version 0.1 - 2 - 5/19/2006 copyright © 2006 mstar semiconductor, inc. All rights reserved. Ÿ supports 4k attribute/code Ÿ horizontal and vertical stretch of osd menus Ÿ pattern...

  • Page 23

    Mst9e19a sxga/wxga+ lcd tv controller with video decoder & 10-bit dual lvds transmitter preliminary data sheet version 0.1 version 0.1 - 3 - 5/19/2006 copyright © 2006 mstar semiconductor, inc. All rights reserved. Pin diagram (mst9e19a) pin 1 1 2 3 4 5 7 9 11 13 14 17 18 21 23 25 27 28 30 32 34 36 ...

  • Page 29: Chapter Iv

    Tcl multimedia r&d center file number: 1 chapter iv alignment of ms19 alignment model: l32m61s3/l32e62s3/l32m71s3 (ms19) edition:v1.1 prepared by: tang zhongzi date: may30,2007 approved by: date:.

  • Page 30

    Tcl multimedia r&d center file number: 2 i. Brief introduction this chassis adopts taiwan semiconductor plant mstar’s integrative chip mst9e19a.It is a high performance and fully integrated ic for multi-function lcd monitor/tv with resolutions up to sxga(1280x1024)/wxga+(1440x900).It is configured w...

  • Page 31

    Tcl multimedia r&d center file number: 3 sat. Saturation curve ok sharp sharpness curve ok light back light curve ok picture mode this function set four picture modes in factory menu(soft,natural,bright, personal) their simulate volume can adjust, but it is adjust well while designing. It can be fin...

  • Page 32

    Tcl multimedia r&d center file number: 4 power on on, it says that tv will turn on while power on. While aging, please set as on. Ok shop init do initial. Press left or right key to initial. While there is ok display on the screen, finished initial. Please initial the tv while it will out of plant. ...

  • Page 33

    H3-hm61as3-sm00c b l32m61s3/ms19 parent child description bom text h3-hm61as3-sm00c 08-lon37a-pw1w ass'y - power bd 08-lon37a-pw1w 09-55c15v-dtx smd.Diode bzv55-c15 d1003 08-lon37a-pw1w 09-55c15v-dtx smd.Diode bzv55-c15 d806 08-lon37a-pw1w 09-55c15v-dtx smd.Diode bzv55-c15 d825 08-lon37a-pw1w 09-55c...

  • Page 34

    08-lon37a-pw1w 13-viper2-2ap ic viper22adip-e u4 08-lon37a-pw1w 18-ff0563-jgx res. M.O. 56k ohm 1w +/-5% r835 08-lon37a-pw1w 18-fg0470-jhx res. M.O. 47 ohm 2w +/-5% r832 08-lon37a-pw1w 18-gj0351-jvx res.Cement 350 ohm 5w +/-5% r6 08-lon37a-pw1w 18-gj0351-jvx res.Cement 350 ohm 5w +/-5% r4 08-lon37a-...

  • Page 35

    08-lon37a-pw1w 19-bb0105-jtx smd. Res 1m ohm 1/10w +/-5% 0805 r1 08-lon37a-pw1w 19-bb0122-jtx smd. Res 1.2k ohm 1/10w +/-5% r837 08-lon37a-pw1w 19-bb0123-jtx smd. Res 12k ohm 1/10w +/-5% r856 08-lon37a-pw1w 19-bb0201-jtx smd. Res 200 ohm 1/10w +/-5% r830 08-lon37a-pw1w 19-bb0202-jtx smd. Res 2k ohm ...

  • Page 36

    08-lon37a-pw1w 25-mdb100-k1x cap.Elec 10uf 25v +/-10% c843 08-lon37a-pw1w 25-nda471-m1x cap. Elec 25v/470uf+/-20% c810 08-lon37a-pw1w 25-nef222-m1x cap.Elec 2200uf 35v +/-20% c802 08-lon37a-pw1w 25-nef222-m1x cap.Elec 2200uf 35v +/-20% c803 08-lon37a-pw1w 26-akc221-krx cap.Cer 220pf 1kv +/-10% c852 ...

  • Page 37

    08-lon37a-pw1w 41-wj0080-b00 wirebarejumper8mm j3 08-lon37a-pw1w 41-wj0080-b00 wirebarejumper8mm j10 08-lon37a-pw1w 41-wj0100-b00 wirebarejumper10mm j9 08-lon37a-pw1w 41-wj0100-b00 wirebarejumper10mm j1 08-lon37a-pw1w 41-wj0110-b00 wirebarejumper11mm j22 08-lon37a-pw1w 41-wj0120-b00 wirebarejumper12...

  • Page 38

    08-lon37a-pw1w 66-343730-0b0 hollow rivet 1.6mmx3.0mmx3.2mm for t801 08-lon37a-pw1w 66-343740-0b0 hollow rivet (2.3mmx4.0mmx3.5mm) for c807 08-lon37a-pw1w 67-h82960-0a0 heat sink for 67-h82963- 1a0&67-h82963-2a0 08-lon37a-pw1w 67-h82961-0a0 heat sink for 67-h82962- 1a0&67-h82962-3a0 08-lon37a-pw1w 6...

  • Page 39

    T8-hm61as3-fcnz 56-835380-1hc1a tv dec ir lens lens dark grey r=y t8-hm61as3-fcnz 55-825060-0cl1c pai frontpanel l32m61s3 black a6881 r=n t8-hm61as3-fcnz 67-l82512-1a01j tv dec inlet l32m61s3 gray black 1j r=n h3-hm61as3-sm00c t8-hm61as3-iry ass'y - infrared receive bdequ t8-hm61as3-iry 02-irr001-xx...

  • Page 40

    T8-hm61as3-man 09-rlz5b6-dtx smd diode rlz5.6bte11 d19 t8-hm61as3-man 09-rlz5b6-dtx smd diode rlz5.6bte11 d18 t8-hm61as3-man 09-stz6v2-ntx smd.Diode stz6.2n d31 t8-hm61as3-man 09-stz6v2-ntx smd.Diode stz6.2n d32 t8-hm61as3-man 09-stz6v2-ntx smd.Diode stz6.2n d33 t8-hm61as3-man 09-stz6v2-ntx smd.Diod...

  • Page 41

    T8-hm61as3-man 19-ab0000-jtx res smd 0 ohm 1/10w +/-5% 0603 r4 t8-hm61as3-man 19-ab0000-jtx res smd 0 ohm 1/10w +/-5% 0603 r67 t8-hm61as3-man 19-ab0000-jtx res smd 0 ohm 1/10w +/-5% 0603 r29 t8-hm61as3-man 19-ab0000-jtx res smd 0 ohm 1/10w +/-5% 0603 r14 t8-hm61as3-man 19-ab0000-jtx res smd 0 ohm 1/...

  • Page 42

    T8-hm61as3-man 19-ab0102-jtx res smd 1k ohm 1/10w 0603 r78 t8-hm61as3-man 19-ab0102-jtx res smd 1k ohm 1/10w 0603 r81 t8-hm61as3-man 19-ab0102-jtx res smd 1k ohm 1/10w 0603 r83 t8-hm61as3-man 19-ab0102-jtx res smd 1k ohm 1/10w 0603 r84 t8-hm61as3-man 19-ab0102-jtx res smd 1k ohm 1/10w 0603 r9 t8-hm6...

  • Page 43

    T8-hm61as3-man 19-ab0152-ftx res.Smd 1.5k ohm 1/10w +/-1% r7 t8-hm61as3-man 19-ab0182-jtx smd. Res 1.8k ohm 1/10w +/-5% 0603 r66 t8-hm61as3-man 19-ab0221-jtx res smd 220 ohm 1/10w 0603 r153 t8-hm61as3-man 19-ab0221-jtx res smd 220 ohm 1/10w 0603 r155 t8-hm61as3-man 19-ab0223-jtx smd. Res 22k ohm 1/1...

  • Page 44

    T8-hm61as3-man 19-ab0750-jtx smd. Res 75 ohm 1/10w 0603 r139 t8-hm61as3-man 19-ab0750-jtx smd. Res 75 ohm 1/10w 0603 r140 t8-hm61as3-man 19-ab0750-jtx smd. Res 75 ohm 1/10w 0603 r141 t8-hm61as3-man 19-ab0750-jtx smd. Res 75 ohm 1/10w 0603 r149 t8-hm61as3-man 19-ab0750-jtx smd. Res 75 ohm 1/10w 0603 ...

  • Page 45

    T8-hm61as3-man 28-aa0225-zfx smd cap 2.2uf/10v/+80/-20% c16 t8-hm61as3-man 28-aa0225-zfx smd cap 2.2uf/10v/+80/-20% c145 t8-hm61as3-man 28-aa0225-zfx smd cap 2.2uf/10v/+80/-20% c144 t8-hm61as3-man 28-aa0225-zfx smd cap 2.2uf/10v/+80/-20% c115 t8-hm61as3-man 28-aa0225-zfx smd cap 2.2uf/10v/+80/-20% c...

  • Page 46

    T8-hm61as3-man 28-ab0104-zfx cap. Smd 0.1uf 50v +80%~-20% f c119 t8-hm61as3-man 28-ab0104-zfx cap. Smd 0.1uf 50v +80%~-20% f c117 t8-hm61as3-man 28-ab0104-zfx cap. Smd 0.1uf 50v +80%~-20% f c116 t8-hm61as3-man 28-ab0104-zfx cap. Smd 0.1uf 50v +80%~-20% f c114 t8-hm61as3-man 28-ab0104-zfx cap. Smd 0....

  • Page 47

    T8-hm61as3-man 28-ab0222-kbx cap.Smd 2200pf 50v +/-10% 0603 c6 t8-hm61as3-man 28-ab0223-kbx smd.Cap.22nf 50v +/-10% c7 t8-hm61as3-man 28-ab0332-kbx cap.Smd 3300pf 50v +/-10% 0603 c5 t8-hm61as3-man 28-ab0473-zfx smd cap 0.047 uf 50v +80-20% c153 t8-hm61as3-man 28-ab0473-zfx smd cap 0.047 uf 50v +80-2...

  • Page 48

    T8-hm61as3-man 45-osc14m-3y2 crystal 14.31818mhz y1 t8-hm61as3-man 46-27626w-04xg pin base *4 tjc3-4aw p2 t8-hm61as3-man 46-33079w-05xg pin base *5 tjc3-5a p9 t8-hm61as3-man 46-35199w-03xg pin base *3 pitch=2.0mm p1 t8-hm61as3-man 46-35199w-04xg conn.Ph-4a 4pin pitch=2.0mm p6 t8-hm61as3-man 46-35199...

  • Page 49

    T8-hm61as3-rcn 46-kt065t-02e01g hs 2pin y0507107 from power switch to power board p801 t8-hm61as3-rcn 46-su015t-02h01g hs 2pin y0612113.2 for right speaker t8-hm61as3-rcn 46-su015t-02h01g hs 2pin y0612113.2 for left speaker t8-hm61as3-rcn 47-pws024-tx2 socket 03geew3es(04nw4) t8-hm61as3-rcn 48-pow01...

  • Page 50

    T8-hm61as3-rcnz 58-827250-3ui1a tv dec overlay l32m61s3 black r=n t8-hm61as3-rcnz 58-hm61mp-jkt1b tv dec overlay l32m61s3 print in silver t8-hm61as3-rcn 62-823250-0hj bracket t8-hm61as3-rcn 62-823270-0hj bracket t8-hm61as3-rcn 62-825520-0hj bracket t8-hm61as3-rcn 62-827310-0hj support_top t8-hm61as3...

  • Page 51

    Chapter vi service guiding • pictures of chassis • block diagram of chassis • layout of main board • scheme diagram of chassis • trouble shooting • explode view diagram.

  • Page 52: I.  Picture For Chassis

    (1) chassis i. Picture for chassis.

  • Page 53

    (2) output and input connectors hdmi input vga input av out y1,pb1,pr1 av1 input av3 input s video input audio input of hdtv and pc earphone output lvds for software upgrade to inventor board power supply audio output on/off control to key board.

  • Page 54

    (3) function introduction of ics tuner audio power amplifier earphone amplifier for save hdmi’s edid for save vga’s edid dc-dc converter eeprom save channel informati on eeprom save main software hpdc data dual- mosfet power ic.

  • Page 55

    Av1/2 input p14 y/pb/pr av out p16 scl/sda u12 z1 tuner tv cvbs pin 49/50 lvds interfere nce p10 panel sifp/sifm pin54/55 pin74/75 pin144 pin148 pin1/2 pin14/15 audio amplifier u19 tda7266sa flash u9 w25x40 key board speakerx2 power supply 08-lon37a-pw1w block diagram of ms19 by holt july5,2007 u11 ...

  • Page 58

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a adj-pwm2 on-pback bl-adjust bl-on/off on/off on/off power-on/off power-on/off panel-on/off power-on/off +5vstb +12v +5vstb +5vstb +12v_inverter +12v +5v +5v vcc-panel +12v +3.3v +12v_amp +12v +12v_amp +12v_inverter +12v +12v_amp +12v 40v +12v +5v +12v adj-pwm2 on-...

  • Page 59

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a +5vst +3.3va +3.3va +3.3va avdd_mempll +3.3va avdd_au +3.3va avdd_sif +3.3va avdd_hdmi +3.3v vddp vddc +3.3va avdda +5v +5vstb vdd_mpll +3.3v vddc +3.3v +5vst title size document number rev date: sheet of ldo dc-dc ? A4 2 10 monday, june 04, 2007 title size docume...

  • Page 60

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a wp adj-pwm2 i2c-sda spi_cz ph-lout led1 sda adj-pwm2 pwm3 spi_di spi_ck wp_fsh scl txd rxd pwm0 txd rxd ddc-rdx led1 on-pback panel-on/off amp-mute wp hdmi_scl hdmi_sda hdmi_scl g_tx1+ hdmi_sda bin- gin- gin+ sog rin+ bin+ rin- vs_rgb bin- gin- rin- r_tx2- rin+ hs...

  • Page 61

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a hpdctrl g_tx1+ hdmi_scl hdmi-hpd r_tx2- r_tx2+ g_tx1- b_tx0- b_tx0+ txclk+ txclk- hdmi-rx2- hdmi-rx1- hdmi-rx0- hdmi-rxc- hdmi-rx1+ hdmi-rxc+ hdmi-rx2+ hdmi-rx0+ hdmi_sda hdmi-ddc-sda hdmi-ddc-scl hdmi/5v +5v +5v +5v r_tx2+ r_tx2- g_tx1+ g_tx1- hdmi_scl b_tx0+ hdm...

  • Page 62

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a bin+ gin- sog gin+ rin+ vga-hs vga-vs vga-r+ vga-sda bin- rin- vga-b+ vs_rgb hs_rgb vga-g+ protect vga-scl txd rxd vga-sda vga-scl gpio-0 protect txd rxd vga/5v +5v +5vstb +5vstb +3.3v bin+ gin+ rin+ sog bin- gin- rin- hs_rgb vs_rgb title size document number rev ...

  • Page 63

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a av2-l av2-r av2-lin av2-rin av2-v av1-v av1-l av1-r av3-r av3-l av3-v pb1 av1-vin+ pr1 av1-y y1 av1-lin av1-rin y1 scb- scr- scg- scr+ scg+ sc_sog scb+ av1-cin av1-yin- av1-c av1-yin y1 pr1 pb1 cvbsout scart2_r scart2_l scart2_lout scart2_rout video_out2 scart2_vo...

  • Page 64

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a tv1-vin- tv1-vin+ power-on/off sif agnd 5va +5v 33v +5v agnd 40v agnd tv1-vin+ tv1-vin- sda_ext scl_ext tv-sifp tv-sifm power-on/off aft title size document number rev date: sheet of tuner ? B 7 10 monday, june 04, 2007 title size document number rev date: sheet o...

  • Page 65

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a amp-r amp-l amp-mute amp-plout+ amp-plout- amp-prout+ amp-prout- power-on/off amp-plout- amp-prout- amp-prout+ amp-plout+ amp-lin amp-rin earphone-ra earphone-la amp-lin amp-rin 5vstb 12v-2 +12v_amp 5vstb +12v amp-l amp-r amp-mute 2 power-on/off 1,2 title size doc...

  • Page 66

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a rxec-/b5 rxe4-/b1 rxe4+/b0 lhsync lvsync lde lck rxe1-/g1 rxe1+/g0 rxoc-/r1 rxoc+/r0 rxe3+/b2 rxe2+/b6 rxec+/b4 rxe3-/b3 rxe2-/b7 rxe0-/g3 rxe0+/g2 rxo4-/g5 rxo4+/g4 rxo3+/g6 rxo3-/g7 rxo2+/r2 rxo1+/r4 rxo2-/r3 rxo0-/r7 rxo1-/r5 rxo0+/r6 rxo3-/g7 rxo3+/g6 rxo4-/g5...

  • Page 67

    5 5 4 4 3 3 2 2 1 1 d d c c b b a a led led key1 led key0 5vstb led led led key0 key1 ir ir 5vstb 5vstb 5vstb title size document number rev date: sheet of ir&key ? Custom 10 10 monday, june 04, 2007 title size document number rev date: sheet of ir&key ? Custom 10 10 monday, june 04, 2007 title size...

  • Page 68

    Power logic sequence power supply unit inverter 24v panel p2 gnd 4 u1/u2 gnd 3 12v 2 12v-amp 1 5vstb 5v u6 regulator u7 3.3v 1.8v u10 u11 u8 cpu/decoder/ scanner eeprom on-pback 5v on/off panel on/off description:while the power cord plug in, the tv is in standby situation,power supply unit provide ...

  • Page 69

    No working y n n y n i2c bus wokring if ok power supply if ok led if lighting check 3 control voltages(power- on/off,panel-on/off,on- pback,) if ok, check 5vstb voltage if ok check the relevant circuitry,e.G.U6 check relevant circuitry check working conditions of u8 if ok crystal/reset circuitry wor...

  • Page 70

    Defect picture check lvds interface assembly if ok check if all signal resources have defect picture check relevant signal channel y n replace the panel remove off the lvds line, if the defect picture still have check rp1 to rp7 and lvds line or connector all signal channel defect fig2. Defect pictu...

  • Page 71

    No picture n y y y n replace u8 y y n check waveform of l28 if regular check the work conditions of tuner if ok y y fig3. No picutre replace u8 test waveform of pin49 of u8 if regular check waveform of l28 if regular replace tuner av input if have picture check p4 if assemble regular check q2,q3,q4 ...

  • Page 72

    Y n y n y n replace u8 check tuner and r220 and l29,c181 if pin3,pin13,pin17and pin22 no voltage or low voltage,check relevant circuitry check voltage of pin6 of u19 and q22 and relevant fig4.Picture ok, but no sound check the speakers check the power supply voltage and mute control circuitry if reg...