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IBM T860 9494-HB0 Service Manual

Summary of T860 9494-HB0

  • Page 1

    Color monitor service manual caution before servicing the unit, read the safety precautions in this manual. Model: t860 (9494-hbn), (9494-hwn) t860 (9494-hb0), (9494-hw0).

  • Page 2

    1. Lcd characteristics type : tft sxga lcd size : 18inch(459.74mm) pixel pitch : 0.2805(h) x 0.2805(v) color depth : 8-bit, 16,777,216 colors electrical interface : lvds surface treatment : anti-glare, hard coating (3h) operating mode : normally black backlight unit : six-ccfl (cold cathode fluoresc...

  • Page 3

    - 3 - warning for the safety-related component. • there are some special components used in lcd monitor that are important for safety. These parts are marked on the schematic diagram and the replacement parts list. It is essential that these critical parts should be replaced with the manufacturer’s ...

  • Page 4

    Timing chart - 4 - video sync b d c f e a dot clock (mhz), horizontal frequency (khz), vertical frequency (hz), horizontal etc... (µs), vertical etc... (ms) >> h – 37.5 840 640 16 64 120 v – 75 500 480 1 3 16 h – 43.269 832 640 56 56 80 v – 85.0 509 480 1 3 25 h – 31.469 840 640 16 96 48 v – 59.94 5...

  • Page 5

    Operating instructions - 5 - front view rear view front control panel front control panel power connect power on/off switch audio dc out d-sub siganl port dvi port 3 2 1 4 5 1. Power indicator this indicator lights up green when the monitor operates normally; in dpms (energy saving) mode, - stand-by...

  • Page 6

    - 6 - on-screen-display (osd) control the settings adjustable with the user controls are viewed through the on -screen display (osd). Press the enter button [ ] to display the main osd menu. Initial appearance of osd image set-up: the image set-up function is used to adjust the level of noise in the...

  • Page 7

    Module main pcb rear shield matal frame matal frame j702 j801 j705 p902 p903 j710 cn1 cn4 cn5 cn6 cn7 cn8 cn9 cn_c01 cn301 cn_c02 - 7 - wiring diagram connector ass’y p/n: 6631t11012p connector ass’y p/n: 6631t25005e.

  • Page 8

    - 8 - d-sub dvi-i gm5020 including (adc / t mds rx ) lvds (thc63lvd823) memory (km416s1 0 2 b t ) h-sync a v-sync a micom 68hc08-bd48 m-clk out - c l k d e ,h/v sync out r,g,b even /odd lcd module r,g,b differentia l lvds:low voltage diffe rential signalin g d a ta 48 bi t a d d ress inverter ctl mo...

  • Page 9

    - 9 - description of block diagram 1. Input signal switching part(ba7657). There are two anolog inputs which are d-sub analog and dvi-anolog input. They come from each 15 pin d-sub and 29 pin dvi-i connector. 2. Video controller part(gm5020). This part amplifies the level of video signal for the ano...

  • Page 10

    - 10 - emi component s line 100 ~ 240v input rectifi e r and filter energy transfer output rectif ie r and filter 12v 5v gnd signal collent ion photo -coupler isolati on pwm contro l circuit hvd c 1 0 0khz primary seconda r y 50 ~ 60 hz.

  • Page 11

    - 11 - operation description_power 1. Emi components. This part contains of emi components to comply with global marketing emi standards like fcc, vcci cispr, the circuit included a line-filter, across line capacitor and of course the primary protection fuse. 2. Input rectifier and filter. This part...

  • Page 12

    - 12 - adjustment all adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several minor adjustment may be required. Adjustment should be following procedure and after warming up for a minimum of 10 minutes. • alignment appliances and tools. - ibm compat...

  • Page 13

    Troubleshooting guide - 13 - 1. No power trouble in bult-in power check j801 5vst voltage (5v) ? No no power (power indicator off) trouble somewhere else trouble in bult-in power check j801 input voltage (12v) ? No trouble in u501 or x501 no yes yes yes check u501’s pin 6. Is this pin oscillated?.

  • Page 14

    - 14 - 2. No raster trouble in invon pattern check j702 pin 8 (5v) ? No no raster trouble in power adater or l703, l704 check j702 pin 1, 2, 3 (12v) ? No trouble in x501 check x501 h. Pulse ? No trouble in u201 check u201(gm5020) ? No trouble in u201 no trouble in u201 check u301, u302, u303 pin 35 ...

  • Page 15

    - 15 - check dot clock pattern no trouble in u201 no check dvs pattern no check dhs pattern no yes yes yes yes yes trouble in lcd module check u401 pin 8 v.Pulse? Check u401 pin 7 v.Pulse? Check u401 pin 10 pulse ? Check l204 pulse ?.

  • Page 16

    - 16 - 3. No clock (clock generator) no dot clock trouble in x201 check x201 24mhz ? No trouble in u201 check l201 clock ? No yes yes.

  • Page 17

    - 17 - 4. Trouble in dpm trouble in dpm trouble in pc check pc pc is not going into dpm off mode no trouble in x501 no trouble in signal cable no yes yes yes check u501 pin 6 waveform (24mhz) ? Check r233, r234? Check u501 pin 11 (0v) ?.

  • Page 18

    Printed circuit board - 18 - 1. Main board (component side) zd721 u301 c301 u302 c302 u303 c318 q703 r730 r740 r741 zd722 j705 1 c526 30 1 j706 20 30 30 20 20 c533 q704 u504 c729 r731 r744 u507 r742 r743 j710 50 40 30 c408 l401 10 10 10 ra238 ra239 c547 60 u401 20 50 r236 ra225 1 50 50 1 1 ra237 ra2...

  • Page 19

    - 19 - 2. Main board (solder side) r732 c738 c730 c731 c307 c303 r206 r207 r205 r203 r210 c403 c402 c308 c314 c311 c306 c310 c316 c309 c313 c305 c312 c304 r214 r215 r204 r216 c406 c404 c401 r404 r403 r402 r401 r405 c317 c315 r213 r209 r211 r212 c407 c405 r208 c820 c207 c209 r232 l205 c263 r237 r238 ...

  • Page 20

    - 20 - 3. Power board (component side) 4. Power board (solder side).

  • Page 21

    - 21 - 5. Control board led1 sw5 r4 sw4 r5 sw3 model:li884e p/n :6870txxxxxx da te :2001.1 1.30 sw2 r3 sw1 r1 r2 zd2 zd1.

  • Page 22

    - 22 - exploded view 1 15 16 11 10 a a c b 6 5 7 2 a 8 9 13 12 3 14 4.

  • Page 23

    - 23 - exploded view parts list ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 a a b c part no. 3091tkl037a 3091tkl037b 6304flp004a 3809tkl022e 3809tkl022f 3043tkk050n 3043tkk050p 6871tst274b 6631t11012p 6633tza008b 4951tks078a 6871tmt276b 6871tpt224a 4814tkk187a 4951tkk071b 4951tkk071c 6631t25005e...

  • Page 24

    - 24 - model: t860(9494-hbn),(9494-hwn),(9494-hb0),(9494-hw0) date: 2001. 12. 6. *s *al loc. No. Part no. Description / specification c106 0cc101ck41a 100pf 1608 50v 5% r/tp np0 c107 0cc101ck41a 100pf 1608 50v 5% r/tp np0 c108 dch7476c621 47uf 6.3v m 3528 tp(-) c109 0ck103ck51a 0.01uf 1608 50v 10% r...

  • Page 25

    Model: t860(9494-hbn),(9494-hwn),(9494-hb0),(9494-hw0) date: 2001. 12. 6. *s *al loc. No. Part no. Description / specification c410 0ce107wf6dc 100uf mvk 16v 20% r/tp(smd) c411 0ck103ck51a 0.01uf 1608 50v 10% r/tp b( c412 0cc102ck41a 1000pf 1608 50v 5% r/tp np0 c413 0ce107wf6dc 100uf mvk 16v 20% r/t...

  • Page 26

    Model: t860(9494-hbn),(9494-hwn),(9494-hb0),(9494-hw0) date: 2001. 12. 6. *s *al loc. No. Part no. Description / specification u504 0iss524202a s524c20d21-sct0 8sop-225 r/ u509 0iss524202a s524c20d21-sct0 8sop-225 r/ u701 0dz560009da udz s 5.6b tp rohm-k sod323 u802 0tffc80009a fairchild fdc6326l r/...

  • Page 27

    Model: t860(9494-hbn),(9494-hwn),(9494-hb0),(9494-hw0) date: 2001. 12. 6. *s *al loc. No. Part no. Description / specification r535 0rj0000d677 0 ohm 1/10 w 5% 1608 r/tp r536 0rj1000d677 100 ohm 1/10 w 5% 1608 r/tp r537 0rj1000d677 100 ohm 1/10 w 5% 1608 r/tp r538 0rj4701d677 4.7k ohm 1/10 w 5% 1608...

  • Page 28

    Model: t860(9494-hbn),(9494-hwn),(9494-hb0),(9494-hw0) date: 2001. 12. 6. *s *al loc. No. Part no. Description / specification c907 0ce476ek638 47uf kmg 50v m fm5 tp 5 c908 0cq2721n419 2700pf 100v j pe ni tp c909 0ck1020k515 1000pf 50v k b tr c911 0ce228ef630 2200uf kmg 16v m fm5 bulk c913 0ce108bf6...

  • Page 29

    Pin configuration - 29 - vsync 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 xtal** pta5/pwm13 pta6/pwm14 pta3/pwm11 pta4/pwm12 ptc5/adc5 ptc4/adc4 ptb7/pwm7 ptb6/pwm6 pta7/pwm15 extal** rst irq ptb5/pwm5 vdd vss vdd3 21 pte0/sog/tch0 pd1/d- ** pd0/d+ ** pta1/pwm9 pta0/pwm8 pta2/pwm10 ptd6*/iic...

  • Page 30

    - 30 - ba7657 multimedia ics 1 2 3 4 5 6 7 8 9 10 11 12 15 14 13 18 17 16 21 20 19 24 23 22 det. Logic syncsepa red 1 input hd sync signal detector green 1 input ground blue 1 input ground red 2 input ground green 2 input ground blue 2 input vd 1 input hd 1 input hd 2 input hd output red output vcc ...

  • Page 31

    - 31 - gm5020 genesis 292p 74f08d 14p sop tp quad 2-input anolog rgb serial i/f sdram/i/f triple adc host interface micro- processor frame store interface osd image caputure/ measure. Ment yuv to rgb converter frame rate conversion control zoom/ shrink/ filter gamma control panel i/f [48-bits] outpu...

  • Page 32

    - 32 - cat24wc08j-te13 8p mc74hct14adr2 14p a0 a1 a2 vss vcc wp scl sda a0 a1 a2 vss vcc wp scl sda 1 2 3 4 8 7 6 5 1 2 3 4 8 7 6 5 a0 a1 a2 vss vcc wp scl sda 1 2 3 4 8 7 6 5 external load sda wp dout sense amps shift registers word address buffers column decoders start/stop logic xdec data in stor...

  • Page 33

    - 33 - s524c20d11/20d21/80d41/80d81 serial eeprom start/stop logic slave adress comparator word address pointer hv generation timing control column decoder row decoder data register dout and ack control logic eeprom cell array 128 x 8 bits 256 x 8 bits 512 x 8 bits 1024 x 8 bits sda scl wp a0 a1 a2 ...

  • Page 34

    - 34 - ba033 low saturation voltage type 3-terminal regulator fdc6326l integrated load switch out reference voltage vcc 1 2 3 gnd block diagram i n o u t o n / o f f e q u i v a l e n t c i r c u i t v d r o p + - s e e a p p l i c a t i o n c i r c u i t 1 5 6 3 2 v i n , r 1 v o u t , c 1 r 2 o n ...

  • Page 35

    Schematic diagram - 32 - 1. Gm5020

  • Page 36

    - 33 - 2. Memory.

  • Page 37

    - 34 - 3. Lvds.

  • Page 38

    - 35 - 4. Micom.

  • Page 39

    - 36 - 5. Dc/dc.

  • Page 40

    - 37 - 6. Connector.

  • Page 41

    - 38 - 7. Input switching.

  • Page 42

    - 39 - 8. Control key.

  • Page 43

    - 40 - 9. Power.

  • Page 44

    Dec. 2001 printed in korea p/no : 3828tso049a.