Roland_sh09_service_manual 电路图 维修原理图.pdf

《Roland_sh09_service_manual 电路图 维修原理图.pdf》由会员分享，可在线阅读，更多相关《Roland_sh09_service_manual 电路图 维修原理图.pdf（7页珍藏版）》请在收音机爱好者资料库上搜索。

1、MAR. 27,198O SH09 SERVICE NOTESI SPECIFICATIONS Keyboard - 32-key,F3-C6(8) lor+,ment;o - 2-5 s Zune range - +65-cent ICF Cutoff frequency - 10 Hz-20 ;ctiz Resonance - O-cscillation Envelope ; _ . . _ :o. - ; py:;:c Choose2SK3GA-Y for micimm ;he VCE,beicg a set of four 3A662s ZKZleakage. of nuch the

2、same characteristics in test -_: ;xc-J;i Check new Q12 for leakage with cransccnductance, re+iires a -_. .-.-.: I,:?; :, j:;c;iry=sllcYrd VCO being LEC zoa-;lateuaider of BA662 A/3 ir. stccK as a replace- the foilowing settings: rcent. Solder SA6bifentat 17ely after3.e- -_. -7: -I._.% _- .iMOD-lo u;

3、E-G fective one is renoved. 2: :yj;i;T :.s,e:r-4 ;z- Is;?-4 FICDULATGR-RANDO:.: :r: L.,A7.j;z-Lx : m.sl-l,-Q ;r .x?G.-J Press C2 key :ith CSTOFF set at “tit w .-. -T : .Si:d-;d T 2”asd BESOBAX-3 at1, - I20 inplt ;-. 1-z I.; VCO should not drift before : -aa .1-. TiT tne next d/H pulse ;enerates. sis

4、al. Acproxinate 5GHz ;sci;lation at .ICF stage proves :he IC adeqate. 5 MAR. 27,198O OPH43B 149H043B (Etch mask 052H15OB) View from the foil side ADJUSTMENT Fl Ci F; h2F3 KEY DESIGNATION only for tne adjustments BENDER Panel setting and connection:,- /iDigital voltmeter!at 10 _, 1. Flip and hold Ben

5、der lever at the left(-). Note the reading. LC 2. Turn and hold the lever at the right (+). Adjast VR-6 on OPH40 for the same reading, but opposite polarity, as in step 1. (Difference between two readings must be within 30 mv.j J KCV Ctinniect ;igital voltmeter to TP-2 on OFHK. 1. Press Fl key and n

6、ote the reading, (Fl-7). 2.While ,-ressi:lg F3 key, adjust /R-l 0: CFii-LiT; for FL-rf 2.233 7 reading. 3. Sir.ce turning X3-1 has an effect on FL-T, repeat steps1 and 2 .until F3-T becomes Fl-V + 2.330 v + 1 m!v. Connect an oscilloscope to T?-3 on OPR47.Apply reference F note to the scope X0. I?1 f

7、or Lissajous figures. A) WIDTH Set RANGE at 8. 1. With F3 key held down, adjust VR-8 for motionless figures. 2. While pressing down Fl key, adjust VR-9 for motionless figures. F3 pitch will vary as VR-9 turned. 3. Repeat steps 1 and 2 until F3 and Fl figures stand still. B) LINEARITY -details follow

8、 A) WIDTH - Set RANGE at 2. Adjust the pots. 1. Fl key - VR-8. 2. F3 key - JR-3. 3. Repeat steps 1 and 2. Adjustments A and B must be repeated C) ElllrIGE -refer to A)WIDTH for details- Set RANGE at 32. Obtain stable Lissajous figures. 1. Fl key - VR-8. Place RANGE at 2. Obtain motionless figures. 1

9、. Fl key - W-7. Dl FREQUENCY Set RANGE at 8. Set TUNE at,its midpoint. 1. While playing A2 key,adjust I VR-8 for 440 Hz. E) DUTY CYCLE because of cross interference between them. Set WAVEFORM at m . 1. Adjust VR-2 for 1:l mark/space. VCF A) WIDTH Set Controls as shown below. 1. While pressing A2 key

10、, set CUTOFF FREQ. for approximate 1 kHz. 2. While playing F2 and F3 keys alternateiy, turn VR-5 until F3 figure doubles F2 in cycle. 5 FREQTUEMCY Connect2sci;lsscope to TP-3 3n G1HJ7. Slide up CUTOFF knob to 10. 1. With Fl key held down, set JR-4 for 20 kHz. 6 MAR. 27,198O SH09 OPH46 OPH47 0 2SK30A

11、 2SC1740-Q or ? 0 2X945-4 0 2SA826-Q or 2SA733-Q CD152473 or lS1555 Metal r_? CRBfFx oxide film .) OPH46-Rl86-189 : tailored for nearly equal resistance 0 0 3 0 21:.: PSH3lA lOOV, PSH32A WV, PSH33A 220/24OV ECEA 148H-a/32/33-A (Etch mask 052H139A) * Mylar 5OV K 5 6 Ceramic 5OV K Check point 59BS8806 SR19R 7 8 Metal film RJ6 OPH46C( 149H046C )view tram WI ride 2c 19 18 17 OPH47C( 149H047C )(PCB 052H141(1)G) Icll-14:BA662 selected.