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Yamaha KB-280 Service Manual

Other manuals for KB-280: Installation Manual
Manual is about: Service Manual

Summary of KB-280

  • Page 1

    Kb-280 1 copyright (c) yamaha corporation. All rights reserved. Pdf ’06.02 service manual hamamatsu, japan contents specifications ................................................................. 3 panel layout .................................................................. 4 circuit board layou...

  • Page 2: Warning

    2 kb-280 warning: chemical content notice! The solder used in the production of this product contains lead. In addition, other electrical/electronic and/or plastic (where applicable) components may also contain traces of chemicals found by the california health and welfare agency (and possibly other...

  • Page 3

    Kb-280 3 specifications.

  • Page 4

    4 kb-280 panel layout q w !9 @0 @1 @2 @3 @4 @5 e y r t u i front panel a’ a.

  • Page 5

    Kb-280 5 032 116 032 116 6 6 8 9 7 u i @6 @7 @8 @9 #0 #1 #2 #3 #4 o !0 !4 !5 !6 !7 !8 !1 !2 !3 rear panel a’ a.

  • Page 6

    6 kb-280 circuit board layout & wiring lower case assembly upper case side upper case side dmlcd am (amjk 1/6) pnr (pn 3/6) am (amjk 4/6) pnl (pn 2/6) pnr (pn 1/6) pnl (pn 4/6) pb (amjk 6/6) am 61h 61l (amjk 5/6) midi (amjk 2/6) twl (pn 5/6, 6/6) twr (pn 5/6, 6/6) speaker r upper case assembly speak...

  • Page 7

    Kb-280 7 30 40 50 130 220 l40 150c wh153 wh155 wh551 wh553 wh556 wh853 wh855 wh771 wh772 wh774 wh775 lower case assembly lcd unit keyboard assembly am circuit board midi circuit board pb circuit board pnr circuit board pnl circuit board *1 *1 *1 *2 *2 *2 *2 *2 *1 *3 *3 *3 *3 *3 *3 *3 *3 *3 *3 *3 *4 ...

  • Page 8: Disassembly Procedure

    Kb-280 8 [320]: bind head tapping screw-b 3.0x12 mfzn2w3 (we987400) [330]: bind head tapping screw-b 3.0x30 mfzn2w3 (wf491000) (fig.1) disassembly procedure caution: be sure to attach the removed filament tape just as it was before removal. Battery cover assembly [320] [320] [330] [320] [320] speake...

  • Page 9

    9 kb-280 knob (fig.4) am am twl (amjk 5/6) am (amjk 4/6) midi (amjk 1/6) (amjk 2/6) tw2 connector assembly lcd unit tw3 connector assembly speaker cable speaker cable [a] [a] [210b] [210a] [210l] [210a] [210e] [210e] [210c] [210d] [210a] [210m] (pn 5/6, 6/6) twr (pn 5/6, 6/6) [210f] [210g] speaker r...

  • Page 10

    Kb-280 10 (fig.7) [l100]: bind head tapping screw-p 3.0x12 mfzn2w3 (we972900) conductor side rubber connector rubber connector (fig.8) 1 2 3 4 5 6 7 8 dmlcd (fig.9) lcd panel nonwoven fabric cloth lcd back light assembly lcd holder rubber connector dmlcd [l100] [210h] [210h] [210n] pnr (pn 3/6) pnl ...

  • Page 11

    11 kb-280 pb wheel assembly (fig.11) (fig.12) [200a]: bind head tapping screw-b 4.0x10 mfzn2w3 (we974500) [200b]: bind head tapping screw-p 3.0x20 mfzn2w3 (wf492000) [200c]: bind head tapping screw-p 3.0x20 mfzn2w3 (wf492000) c6 c1 c2 c3 b2 b3 c4 c5 [200a] speaker l (woofer) speaker r (woofer) keybo...

  • Page 12

    Kb-280 12 [190a] [180a] [180b] [180a] [180a] [180b] [190a] [190b] [190b] 61l 61h rubber contact rubber contact rubber contact (fig.13) [180]: bind head tapping screw-b 3.0x8 mfzn2w3 (we774300) [190]: bind head tapping screw-p sp 3.0x12 mfzn2b3 (wf491900) hook rubber contact (photo 1) (photo 2) 13. D...

  • Page 13

    13 kb-280 10 11 12 2 4 5 6 7 8 1 1 2 3 5 9 6 7 8 61l 61h 3 4 (fig.14) [380] (fig.15) * when installing the circuit board 61h, tighten the screws 1 through 8 in numerical order as shown in the figure for circuit board “61h” in fig. 14. (fig. 14) * when the black keys from c#2 to a#2, from c#3 to a#3 ...

  • Page 14: Lsi Pin Description

    Kb-280 14 ymw767-vtz (x6055a00) cpu (swl01b) ...................................................................................... 14 nt3881dfg-01 (x3148a00) lcd driver ....................................................................................... 15 ml9040a-b01gaz03a (xz987a00) lcd driver...

  • Page 15

    15 kb-280 pin no. I/o function name pin no. I/o function name 1 2 3 4 5 cs va gnd ain4 ain3 i - - i/o i/o chip select power supply ground analog input 6 7 8 9 10 ain2 ain1 din dout sclk i/o i/o i o i analog input digital data input digital data output digital clock input adc084s021cimm (x6905a00) ad...

  • Page 16: Ic Block Diagram

    Kb-280 16 ic block diagram sn74lv32apwr (x5647a00) dmlcd: ic207 quad 2 input or sn74lv138apwr (x7284a00) dmlcd: ic401, 402 3 to 8 demultiplexer ba4510f-e2 (x7300a00) dmlcd: ic502 dual operational amplifier 1 2 3 1a 1y 4 2a 5 2b 6 2y 7 gnd 1b 14 13 12 vcc 4a 11 4y 10 3b 9 3a 8 3y 4b 1 2 3 4 5 6 7 a a...

  • Page 17: Circuit Boards

    17 kb-280 note: see parts list for details of circuit board component parts. Am (amjk 1/6) circuit board (x7176c0) ............................................................................... 24 am (amjk 4/6) circuit board (x7176c0) ...................................................................

  • Page 18

    Kb-280 18 dmlcd circuit board dmlcd: 2na-wg23540 component side to midi-cn853 to am(amjk 1/6)-cn155 to pnr(pn 1/6)-cn771 not installed not installed to pnl(pn 2/6)-cn774 to 61l-cn5 to 61h-cn1 to 61h-cn2 not installed.

  • Page 19

    19 kb-280 dmlcd circuit board pattern side dmlcd: 2na-wg23540

  • Page 20

    Kb-280 20 pnr (pn 1/6) circuit board pnr: 2na-wg23610 1 to dmlcd-cn701 component side component side pnr (pn 3/6) circuit board.

  • Page 21

    21 kb-280 pnr (pn 3/6) circuit board pnr (pn 1/6) circuit board pnr: 2na-wg23610 1 pattern side pattern side.

  • Page 22

    Kb-280 22 pnl (pn 2/6) circuit board pb: 2na-wg23590 1 pnl: 2na-wg23610 1 to dmlcd-cn703 pitch bend pnl (pn 4/6) circuit board pb (amjk 6/6) circuit board component side component side component side.

  • Page 23

    23 kb-280 pnl (pn 2/6) circuit board pnl (pn 4/6) circuit board component side pattern side twl, twr (pn 5/6, 6/6) circuit board pattern side pattern side pnl , twl, twr: 2na-wg23610 1 twl: to am (amjk 1/6) -cn553 twr: to midi (amjk 2/6) -cn556 to tweeter.

  • Page 24

    Kb-280 24 component side am (amjk 1/6) circuit board to ba ck light to dmlcd-cn101 to twl(pn 5/6,6/6) to battery to w oofer l dc in 12v phones/ output expression master volume standby/on am (amjk 4/6) circuit board am (amjk 5/6) circuit board component side component side am: 2na-wg23590 1.

  • Page 25

    25 kb-280 to dmlcd-cn401 to 61l-cn4 to dmlcd-cn403 a a’ a a’ b b’ to dmlcd-cn402 to 61h-cn3 b b’ 61h circuit board 61l circuit board component side component side 61h: 2nakb-v869540 61l: 2nakb-v869520

  • Page 26: Test Program

    26 kb-280 test program test no. Lcd display test descriptions, judging conditions, etc. 4 test program list 1 displays version of the rom. “ prog ∗∗∗ ” is displayed on the lcd. ∗∗∗ : version 2 checks the rom connected to the cpu bus. Make sure that “ rom ok ” is displayed on the lcd. 3 checks the ra...

  • Page 27

    Kb-280 27 9 checks switches and leds on the panel. Press the switches as shown in the lcd. When a switch is pressed, a sound is played at the prescribed pitch. (refer to the switch test item list on the next page.) when a switch with led is turned on, the led will light up. Make sure that “ sw ok ” ...

  • Page 28

    28 kb-280 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 acmp vol acmp vol tempo tempo style ab 8beat ballad rock disco 1 lou gu rumba bossa march waltz metro4/4 function +/yes –/no touch reverb sustain demo voice ab dual split er hu 1 pi pa 1 yang...

  • Page 29: Initialization

    Kb-280 29 initialization clr frash.

  • Page 30: Midi Implementation Chart

    30 kb-280 midi implementation chart yamaha [ portatone ] date:17-nov-2005 model kb-280 midi implementation chart version : 1.0 transmitted recognized remarks function... Basic default 1 - 16 1 - 16 channel changed x x default 3 3 mode messages x x altered ************** x note 0 - 127 0 - 127 number...

  • Page 31: Midi Data Format

    Kb-280 31 midi data format.

  • Page 32: Parts List

    Parts list contents overall assembly ..................................................... 2 keyboard assembly .................................................. 5 lower case assembly .............................................. 6 exp pedal ............................................................

  • Page 33: Overall Assembly

    Kb-280 2 * * * * * * * music rest 330 310 320 340 340d 340a 340b 340f 340e 340c 340c 20 50 40 90 100 60 80 10 l10 l20 l30 l40 l70 l90 l110 l100 l80 70 250 180 160 190 260 210 210 210 270 270 270 370 110 200 210 210 210 210 370 380 370 210 140 130 280 210 210 210 210 210 290 360 350 20 50 30 150 270 ...

  • Page 34

    Kb-280 3 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * * * * * * * * * * * * * * * * * * * * * * overall assembly kb-280 overall assembly (wf68200) 10 upper case assembly 20 speaker 3.0cm tweeter 2 01 30 circuit board twl 40 circuit board twr 50 sponge 2 01 60 panel ...

  • Page 35

    Kb-280 4 : new parts ref no. Part no. Description remarks qty rank rank: japan only l110 nonwoven fabric cloth 5x8 (v706870) 2 accessories music rest ac adaptor pa-5d chn 08 exp pedal ep-1 kai (vp62250) -- wg073800 wf324900 --.

  • Page 36: Keyboard Assembly

    Kb-280 5 mk circuit board assembly 200 200 10 200 10a 180 180 150a 150b 150c 150d 190 160 190 10b 150 170 10b 10a 60 50 50 40 40 30 : new parts ref no. Part no. Description remarks qty rank rank: japan only keyboard assembly kb-280 keyboard assembly 16n c61 10 white key 16n cegbdfa 5 04 10a white ke...

  • Page 37: Lower Case Assembly

    Kb-280 6 50 30 40 80 90 100 190 170 200 200 210 220 60 60 170 170 180 200 200 210 220 110 130 170 170 120 120 10 20 l60 l30 l20 l30 l20 l30 l20 l70 l60 l10 l40 keyboard assembly: see page 5. Speaker box r assembly speaker box l assembly lower case sub assembly 230 170 170 170 lower case assembly.

  • Page 38

    Kb-280 7 : new parts ref no. Part no. Description remarks qty rank rank: japan only lower case assembly kb-280 lower case assembly (wg07410) 10 lower case sub assembly 20 keyboard assembly 16n c61 30 connector assembly mk3 7p l=550 40 connector assembly mk2 5p l=500 50 connector assembly mk1 12p l=6...

  • Page 39: Exp Pedal

    Kb-280 8 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * exp pedal ep-1 kb-280 exp pedal ep-1 (vp62250) 10 shaft 02 20 coil spring ep-1 (vp60730) 30 metal holder 2 03 40 frame a 04 50 frame b 04 60 exp pedal plate 04 70 actuator ep-1 (vp60740) 80 foot (vp79690) 4 90 fe...

  • Page 40: Electrical Parts

    Kb-280 9 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * * * * * * * * * * electrical parts kb-280 circuit board am (amjk 1,4,5/6) (wg23590)(x7176c0) circuit board midi (amjk 2/6) (wg23590)(x7176c0) circuit board pb (amjk 6/6) (wg23590)(x7176c0) circuit board dmlcd (wg...

  • Page 41

    Kb-280 10 : new parts ref no. Part no. Description remarks qty rank rank: japan only * * * cn853 cable holder 51048 9p te cn855 cable holder 51048 3p te 01 cn855 cable holder 51048 3p te d151 diode 2a02g-01 x0 ji d151 diode 2a02-05 x0 01 d152 diode 10eda40-ta1b2 26 01 d153 diode 10eda40-ta1b2 26 01 ...

  • Page 42

    Kb-280 11 : new parts ref no. Part no. Description remarks qty rank rank: japan only * circuit board dmlcd (wg23550)(x7174c0) c101 ceramic capacitor-f (chip) 0.1000 25v z rect. 01 c102 ceramic capacitor-f (chip) 0.1000 25v z rect. 01 c103 electrolytic cap. (chip) 10 16v 01 c104 electrolytic cap. (ch...

  • Page 43

    Kb-280 12 : new parts ref no. Part no. Description remarks qty rank rank: japan only * cn401 wire trap 52147 12p te 01 cn402 wire trap 52147 7p te 01 cn403 wire trap 52147 5p te 01 cn701 wire trap 52147 16p te 01 cn703 wire trap 52147 16p te 01 cn803 wire trap 52147 9p te 01 d701 diode 1ss355 te-17 ...

  • Page 44

    Kb-280 13 ref no. Part no. Description remarks qty rank : new parts rank: japan only * * * * * * * * * * r727 carbon resistor (chip) 0 63m j rect. 01 -732 carbon resistor (chip) 0 63m j rect. 01 r746 carbon resistor (chip) 100.0 63m j rect. 01 r747 carbon resistor (chip) 47.0k 63m j rect. 01 -754 ca...

  • Page 45

    Kb-280 14 : new parts ref no. Part no. Description remarks qty rank rank: japan only speaker 3.0cm tweeter 2 01 speaker 12.0cm 4ohm 6w woofer 2 06 lcd x0159a00 x5163a00 wf817100

  • Page 46

    1 2 3 4 5 6 h g f e d c b a kb-280 kb-280 block diagram kb-280 block diagram 28ca1-2001002836 r+ r+ l+ r+ + - r+ r+ r- r- l- r- l+ l+ a5k Ω +v pb0-pb7 pa4,pa6,pa7,pc6 pa4 power amp 6w x 2 btl la4625 led in midi out i/f rxd0 txd0 pc7 led pa6 pa6 pb0-pb5 pb0-pb5 pa6 pb6 ain4 ain1 ain1 ain1 1pcs 1pcs 1...

  • Page 47

    12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q kb-280 kb-280 kb-280 kb-280 overall circuit diagram (am, dmlcd, midi, pb, pnl, pnr, twl, twr, 61h, 61l) 28cc1-2001002844 28cc1-2001002844 28cc1-2001002844 : flame proof c.Resisto...