Yamaha XS250 Service Manual - page 6

Other manuals for XS250: Owner's Manual
Manual is about: Power amplifier

Summary of XS250

  • Page 1

    1.97k-9636 1.69k-545 printed in japan '99.1 contents specifications .................................................................. 3 panel layout .................................................................... 4 dimensions .......................................................................

  • Page 2

    2 xs250/350 important notice this manual has been provided for the use of authorized yamaha retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically yamaha products, are already known and understood by the users, and hav...

  • Page 3

    3 xs250/350 •general specifications xs250,xs350 power output level (rated power) 8 ohm/stereo 20 hz~20 khz 4 ohm/stereo thd+n= 0.1% 8 ohm/bridge 1 khz 8 ohm/stereo thd+n= 0.1% 4 ohm/stereo 8 ohm/bridge 1 khz, 20 ms, no cilp 2 ohm/stereo power bandwidth half power total harmonic distortion (thd+n) 4–...

  • Page 4

    4 xs250/350 panel layout front panel rear panel power power signal clip signal clip protection ch a ch b on off b-2 channel a-2 8-16 Ω (bridge) (–) (+) 4-8 Ω /channel (stereo) b-1 channel a-1 8-16 Ω (bridge) (–) – – + + (+) 4-8 Ω /channel (stereo) (bridge) (parallel) (bridge) (parallel) filter chann...

  • Page 5

    5 xs250/350 dimensions block diagram unit: mm ic102 3 1 2 2 7 7 2 ic101 5 7 6 2 7 7 2 ic104.

  • Page 6

    6 xs250/350 pa7 sub 1/5 sub 2/5 sub 3/5 sub 4/5 sub 5/5 circuit board layout & wiring top view front view sub 4/5 wire color xs350 only power transformer 3nc2-v294020

  • Page 7

    7 xs250/350 1. Top cover 1-1 remove the nine (9) screws marked [410]. The top cover can then be removed. (fig. 1, 2) 2. Power transformer 2-1 remove the top cover. (see procedure 1.) 2-2 remove the four (4) screws marked [70]. The power transformer can then be removed. (fig. 1) 5. Front panel 5-1 re...

  • Page 8

    8 xs250/350 pa7 [60a]: bind head screw sp 3.0x8 mfzn2y (eg330290) [80b,c]: bind head tapping screw-b 3.0x12 mfzn2bl (vq074600) 10. Pa7 circuit board 10-1 remove the top cover. (see procedure 1.) 10-2 remove the front panel. (see procedure 5.) 10-3 remove the pa7 unit. (see procedure 9.) 10-4 remove ...

  • Page 9

    9 xs250/350 11. Rear assembly 11-1 remove the top cover. (see procedure 1.) 11-2 remove the six (6) screws marked [270]. The rear assembly can then be removed. (fig. 7) 12. Sub 5/5 circuit board 12-1 remove the top cover. (see procedure 1.) 12-2 remove the rear assembly. (see procedure 11.) 12-3 rem...

  • Page 10

    10 xs250/350 m5238ap (xm085a00) operational amplifier 1 2 3 4 -v 8 7 6 5 output a +v non-inverting input a -dc voltage supply +dc voltage supply output b inverting input b non-inverting input b inverting input a + - + - ic block diagram.

  • Page 11

    Xs250/350 xs250/350 xs250/350 sub 1/5 circuit board sub 2/5 circuit board sub 3/5 circuit board sub 4/5 circuit board sub 5/5 circuit board •sx350 sub(u) :3na-v290000 2 sub(h) :3na-v290010 2 components side components side components side components side components side circuit boards from t101 to s...

  • Page 12

    Xs250/350 xs250/350 xs250/350 pa circuit board •sx350 3na-v2899600 1 •sx250 3na-v2899500 1 components side to sub 2/5-cn301 to sub 1/5-cn611 from fan to sub 3/5-cn501 to sub 2/5-cn101 12.

  • Page 13

    13 xs250/350 a stereo and parallel operation before performing any following adjustments, set the unit as follows: 1. Set the attenuations at the max. 2. Input terminal: cannon connector pin 2 is hot, pins 1 and 3 ground. 3. Mode switch: stereo 4. Output terminal: rl = 4 ohm/more than 500 w 5. Other...

  • Page 14

    14 xs250/350 7. Harmonic distortion test when a high quality sine wave is applied at 20 hz, 1 khz or 20 khz, the harmonic distortion should be as follows: *this test should have been finished within 30 minutes. 8. Channel separation test 8-1 apply a -5 dbu, 20khz sine wave into the channel a. 8-2 sh...

  • Page 15

    15 xs250/350 13. Signal indicator test when a sine wave of 1 khz, -23 dbu is applied to the input, signal indicator should light up. B bridge operation before performing any following adjustments, set the unit as follows: 1. Set the attenuations at max. 2. Input terminal: cannon connector pin 2 is h...

  • Page 16: Power Amplifier

    Power amplifier xs250/350 parts list } • the numbers in “qty” shows quantities for each unit. • the parts with “--” in “parts no.” are not available as spare parts. • the mark “ ” in the remarks column indicates that these parts are interchangeable. Notes: destination abbreviations a : australian mo...

  • Page 17

    Xs250/350 2 overall assembly 15 410 400 390 430 430 440 440 260 260i 260j 420 410 260i 270 260k 260f 260c 260g 260h 100 190 130 130 120 140 150 160 170 210 205 180 110 220 220 360 380 375 370 350 380 360 250 10 30 50 40 20 60 70 80 260b 260e 200 6 6 450 ul only 260a 260d.

  • Page 18

    Xs250/350 xs250/350 3 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 10 15 20 30 30 30 40 50 60 60 60 60 60 60 70 80 90 100 100 110 120 130 140 150 160 170 180 190 200 205 210 220 2...

  • Page 19

    Xs250/350 xs250/350 pa unit 80 20 20 20 70 80 40 40 40 60 80 90 40 80 10 6 50 4 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 * * * * * * * 10 20 40 50 50 60 70 80 90 v 2 9 4 1 5 0 0 v 2 9 4 1 6 0 0 -- v 2 9 4 5 4 0 0 v v 0 8 6 5 0 0 v 2 8 9 9 6 0 0 v 2 8 9 9 5 0 ...

  • Page 20

    Xs250/350 5 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 (xv023c0) (xv023c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (xv419c0) (vv29140) electrical parts c201 c202 c203 c204 c205 c206 c207 c208...

  • Page 21

    Xs250/350 6 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 -306 d307 d308 d309 d310 d401 d402 d403 l201 l301 q201 -203 q204 -206 q207 q208 q209 q210 q211 q212 q213 q214 q215 q216 q217 q301 -303 q304 -306 q307 q308 q309 q310 q311 q312 q313 q314 q315 q316 q317 q401 q...

  • Page 22

    Xs250/350 7 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 r228 r229 r230 r231 -233 r234 r235 r236 -238 r239 r240 r241 -243 r244 r245 r246 -248 r249 r250 r251 r252 -254 r255 r256 r257 r258 -260 r261 r262 r263 r264 r265 r266 r301 r302 r303 r304 r305 r306 r307 r308 r...

  • Page 23

    Xs250/350 8 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 r340 r341 -343 r344 r345 r346 -348 r349 r350 r351 r352 -354 r355 r356 r357 r358 -360 r361 r362 r363 r364 r365 r366 r401 r402 -403 r404 r405 w201 cn201 cn202 cn301 cn302 cn401 cn403 cn404 cn405 cn406 cn408 -...

  • Page 24

    Xs250/350 9 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 c101 c102 c103 c104 c105 c106 c107 c108 c109 c110 -121 c122 c123 c124 c125 c501 c502 c503 c504 c505 c506 c507 c601 c602 c603 -605 c606 c607 c608 c609 c610 c611 c612 d101 -104 d601 -607 d608 e101 f101 f101 f...

  • Page 25

    Xs250/350 10 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 r107 r108 r109 r110 r111 r112 r113 r114 r115 r116 r117 r118 r119 r120 r121 r122 -125 r126 r127 r128 r129 r130 r131 r132 r133 r134 r135 r136 r137 r138 r139 r140 r141 r142 r143 r144 r145 r146 r147 r148 r501 ...

  • Page 26

    Xs250/350 11 *: new parts rank: japan only ref no. Part no. Description remarks qty rank 部 品 名 cn103 cn407 cn501 cn601 -603 cn604 cn605 cn606 cn607 cn608 cn609 cn610 cn611 cn612 ic101 ic102 -106 ic107 ic108 jk101 jk102 jk103 ld501 ld502 ld503 ld504 ld505 ld506 ld507 sp401 sp402 sw101 sw102 sw103 sw6...

  • Page 27

    Xs250/350 xs250/350 sub1/5 a b c d e f g h i j k l m n o p q a b c d e f g h i j k l m n o p q 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 xs250/350 sub2/5 sub3/5 sub5/5 sub4/5 pa7 xs250/350 overall circuit diagram (pa7, sub1/5 - sub5/5) • xs350 only • xs350 only • xs350 only kec-92348 2 k...