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IBM 6551-T3N Service Manual

Summary of 6551-T3N

  • Page 1

    Chassis specifications service manual f99 trinitron ® color graphic display 6551-t3n/6551-u3n aep model chassis no. Scc-l40a-a (6551-t3n) chassis no. Scc-l40b-a (6551-u3n) model spec. Body color dest. 6551-t3n white type aep 6551-u3n black type aep picture tube 0.24 mm aperture grille pitch 19 inche...

  • Page 2

    6551-t3n/6551-u3n – 2 – leakage test the ac leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part hav- ing a return to chassis, must not exceed 0.5 ma (500 microampers). Leakage current can be measured by any one of three methods. 1. A commerc...

  • Page 3

    6551-t3n/6551-u3n – 3 – this monitor meets the power-saving guidelines set by vesa and e nergy s tar, as well as the more stringent nutek . If the monitor is connected to a computer or video graphics board that is vesa dpms (display power management signaling) compliant, the monitor will automatical...

  • Page 4

    6551-t3n/6551-u3n – 4 – timing specification mode test mode mode at production mode 1 mode 2 mode 3 mode 4 mode 5 resolution 640 x 480 640 x 480 800 x 600 800 x 600 1024 x 768 clock 25.175 mhz 36.000 mhz 49.500 mhz 56.250 mhz 78.750 mhz horizontal h-freq 31.469 khz 43.269 khz 46.875 khz 53.674 khz 6...

  • Page 5

    6551-t3n/6551-u3n – 5 – table of contents section title page 1. General ................................................................. 1-1 2. Disassembly 2-1. Cabinet removal ................................................ 2-1 2-2. Shield (emi, video), side cover (l and r) removal .................

  • Page 6

    Section 1 general the operating instructions mentioned here are partial abstracts from the operating instruction manual. The page numbers of the operating instruction manual remain as in the manual. 1-1 2.

  • Page 7

    1-2 4.

  • Page 8

    1-3.

  • Page 9

    1-4.

  • Page 10

    1-5.

  • Page 11

    1-6.

  • Page 12

    1-7.

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    1-8.

  • Page 14

    1-9.

  • Page 15

    1-10

  • Page 16

    6551-t3n/6551-u3n 5 two screws (+bvtp 4 x 16) 3 screw cover (ul) 1 screw cover (ur) 6 bucket assy push in the tip of a screwdriver to unlock the claw. 2 2 1 screw cover (ll) 4 screw cover (lr) 5 two screws (+bvtp 4 x 16) four screws (+bvtt 4 x 8) 5 four screws (+bvtt 4 x 8) 7 five screws (+bvtt 4 x ...

  • Page 17

    6551-t3n/6551-u3n 5 three screws (+bvtp 3 x 8) cn904 cn601 cn600 cn303 7 d board n board 6 screw (+p 3.5 x 20) 2 screw (+bvtt 4 x 8) 4 rear shield complete assembly 1 cable cover 3 widening the chassis toward the direction a , disengage two claws. A a refering to 2-3, disconnect five connectors (cn3...

  • Page 18

    6551-t3n/6551-u3n four screws (tapping screw (5)) h board two screws (+ bvtp 4 x 16) input selection cn2001 picture tube shield before removing the bezel assembly, secure the picture tube shield at the positions shown with the arrow (diagonal two places) to prevent the picture tube from falling. (us...

  • Page 19

    6551-t3n/6551-u3n a b 2-7. Picture tube removal 2-4 cn11 cn2001 cn1 2pin 4 four screws (tapping screw (5)) 3 three connectors 7 neck assembly 1 anode cap 2 a board 8 deflection yoke 6 picture tube 5 bezel assembly 3 when one side of the rubber cap is separated from the anode button, the anode-cap ca...

  • Page 20

    6551-t3n/6551-u3n cn603 cn501 cn600 h board degaussing coil n board fbt a board picture tube rear shield side cover (l) cn11 cn2001 cn1 cn702 cn701 cn904 cn901 cn601 cn315 cn309 cn301 cn313 cn302 cn1003 cn1002 cn1004 d board ac inlet cn310 cn306 cn311 cn303 cn308 2-8. Harness location 2-5.

  • Page 21

    6551-t3n/6551-u3n part replaced ( ] ) d board t901(fbt), ic901, r924, r925, rv901 • mounted d board d board t901(fbt), r917, r918, r923, r920, r919, r1004, c920, d911, r912, • mounted d board d board r933, r932, r921, r1006, d915, d917, ic901, t901(fbt) • mounted d board b) high voltage hold-down fu...

  • Page 22

    6551-t3n/6551-u3n section 4 adjustments 4-1 • landing rough adjustment 1. Enter the full white signal. (or the full black dots signal). 2. Adjust the contrast to the maximum. 3. Make the screen monogreen. Note: off the outputs from r ch and b ch of sg. 4. Reverse the dy, and adjust coarsely the puri...

  • Page 23

    6551-t3n/6551-u3n connect the communication cable of the computer to the connector located on the d board on the monitor. Run the service software and then follow the instruction. Ibm at computer as a jig 1-690-391-21 1 a-1500-819-a interface unit 2 *the parts above ( ) are necessary for das adjustm...

  • Page 24

    5-1 5-2 section 5 diagrams 5-1. Block diagrams 3 1 4 7 5 2 bp clp c blk c sync h sync v sync input sel cn309 2 6 4 8 9 blue1 red1 green1 vd1 hd1 cn313 cn307 2 3 ddc scl ddc sda 2 3 ddc scl ddc sda cn310 cn311 8 6 1 2 4 iic sda iic scl h synco v synco h fbp cn306 cn2001 e 1 5 3 7 kb kr kg heater cn31...

  • Page 25

    5-3 5-4 + – 4 3 txd rxd cn1001 to ecs 1 3 4 7 5 2 22 28 30 20 44 45 53 50 49 48 47 46 36 37 27 26 32 34 33 25 1 15 51 52 39 38 54 2 3 c blk bp clp c sync h sync v sync input sel clamp out c synci h synci1 v synci1 p3.0 p8.1 p8.0 p3.1 p3.2 p3.3 scli sdai h synco v synco hfback scld sdad wdout reset i...

  • Page 26

    D a h n 5-5 5-6 5-2. Frame schematic diagram 5-3. Circuit boards location h kb kg kr g1 g2 gm g4 rcv hv 1 2 3 4 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 1 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 1 2 3 4 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6...

  • Page 27

    1 2 3 4 a b note: • all capacitors are in µf unless otherwise noted. (pf: µµf) capacitors without voltage indication are all 50 v. • indication of resistance, which does not have one for rating electrical power, is as follows. Pitch: 5 mm rating electrical power 1/4 w (chip : 1/10 w) • all resistors...

  • Page 28

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 a b c d e f g h i 5-9 5-10 (1) schematic diagram of a board 4.16 vp-p (h) 4.16 vp-p (h) 4.08 vp-p (h) 49.8 vp-p (h) 49.8 vp-p (h) 48.8 vp-p (h) 49.8 vp-p (h) 49.8 vp-p (h) 48.8 vp-p (h) 1.78 vp-p (8 mhz) 1 2 3 4 5 6 7 8 9 0 • a board waveforms 1.4 1.4 1.4 2.1 2 2.1 1...

  • Page 29

    5-11 5-12 (2) schematic diagrams of d ( a , b , c ) board 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 a b c d e f g h i schematic diagram a a a a a board schematic diagram d d d d d - a board , • d- a board waveform 1 1.94 vp-p (8 mhz) • divided circuit diagram one sheet of d board circuit diagram is divided...

  • Page 30

    6.3 6.3 6.3 0.3 11.2 6.9 6.8 118 198 0 0.4 1.4 0.9 0 35.1 0 33.5 0 0 0 5 5 33.4 5 0 3.1 76.6 2.6 1.8 -9.9 121 4 1.1 2.5 2.7 12.5 12.8 0.1 4.5 0 0.7 11.8 0 1.2 5 3 2.5 6.5 12.8 3.3 3.3 0 4.9 4.9 82.3 81.9 81.7 82.2 81.8 86.9 522 -0.6 130 44 0.2 2 3 2 4 5 6 10 1 9 1 2 3 4 1 2 4 3 5 6 i o g 1 2 3 4 5 2...

  • Page 31

    1 2 3 4 5 6 7 8 9 10 a b c d e f g h i 5-15 5-16 schematic diagram d d d d d - c board , schematic diagram d d d d d - b board 4 131.5 vp-p (h) 5 60.8 vp-p (h) 6 1.41 vp-p (h) 7 53.0 vp-p (h) • d- c board waveforms * : refer to terminal name of semiconductors in silk screen printed circuit (see page...

  • Page 32

    1 2 3 4 5 6 7 a b c d e 5-17 5-18 — d board — d µ -com, cy, deflection, power, hdef, hv note: the circuit indicated as left contains high voltage of over 600 vp-p. Care must be paid to prevent an electric shock in inspection or repairing..

  • Page 33

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 a b c d e f g h i 5-20 5-19 schematic diagrams n n n n n , h h h h h boards , n dsp h user controll (3) schematic diagrams of n, h boards 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 ...

  • Page 34

    5-21 5-5. Semiconductors ba00ast-v5 ba05st-v5 h8d2972 la6500-fa ba05t ld1117s33tr ba9758fs-e2 ba9759f-e2 br24c16f-e2 njm2904m njm2904m(te2) njm4558m-te2 µpc4558g2 st24fc21m6tr bu4053bcf-t2 5 1 1 2 3 18 pin sop 1 top view n 8 pin sop 1 top view n 16 pin sop 1 top view n cxd9517q cxd9522s cxd9523s/jcn...

  • Page 35

    5-22 2sc5022-02 2sc5445(lbsony1) 2sk2098-01mr-f119 2sk3155-01 2sk3157-01 bt149g-412-ot359 tl1431cz-ap dtz-tt11-15b dtz4.7c ma111-(k8).S0 ma111-tx rd12sb2 rd5.6s-b udz-te-17-12b udz-te-17-4.7b udz-te-17-5.6b b c e b c e g d s anode cathode gate cathode anode d10sc9m d2l40-ta erb38-06v1 hss82 mtzj-t-7...

  • Page 36

    6551-t3n/6551-u3n • items marked " * " are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • items with no part number and no description are not stocked because they are seldom required for routine service. • the constructi...

  • Page 37

    6551-t3n/6551-u3n 6-2. Picture tube z 7-685-881-09 +bvtt 4x8 s 7-685-663-71 +bvtp 4x16 ref.No. Part no. Description remark ref.No. Part no. Description remark 6-2 the components identified ! Marked are critical for safety. Replace only with the part number specified. 60 61 59 71 62 72 63 53 56 57 54...

  • Page 38

    6551-t3n/6551-u3n 6-3. Packing materials ref.No. Part no. Description remark ref.No. Part no. Description remark 6-3 the components identified ! Marked are critical for safety. Replace only with the part number specified. 101 102 103 104 110 109 101 * 4-073-027-01 individual carton 102 * 4-073-029-0...

  • Page 39

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 40

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 41

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 42

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 43

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 44

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 45

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 46

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 47

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 48

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 49

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 50

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 51

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...

  • Page 52

    Ref.No. Part no. Description remark ref.No. Part no. Description remark the components identified ¡ marked are critical for safety. Replace only with the part number specified. Les composants identifiés par la marque ¡ sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le nu...