Yamaha-XH-150-Service-Manual电路原理图.pdf

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1、 CONTENTS SPECIFICATIONS 3/4 PANEL LAYOUT 5 DIMENSIONS 6 BLOCK DIAGRAM 6 CIRCUIT BOARD LAYOUT the four (4) screws marked 80c and the six (6) screws marked 60a. The PA7 circuit board can then be removed. (Fig. 6) (Fig. 7) 270Rear assembly 270270 270 270: Bonding Tapping Screw-B 4.0X8 MFZN2BL (VR77990

2、0) 11. Rear Assembly 11-1 Remove the top cover. (See Procedure 1) 11-2Remove the six (6) screws marked 270 . The rear assembly can then be removed. (Fig. 7) 11 XH150 2/5 5/5 Cover, Speaker terminal Rear panel 440 2 260ia 4 260ia 2 260ib 2 260b 2 420 2 260:Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ

3、074600) 260ia: Bind Head Screw A4.0X8 MFZN2BL (VP156800) 260ib: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190) 420:Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300) 440:Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190) (Fig. 8) 12. SUB 5/5 Circuit Board 12-1 Remove the top cover. (See Procedure

4、1) 12-2 Remove the rear assembly. (See Procedure 11) 12-3 Remove the two (2) screws marked 440 and the two (2) screws marked 420 and the two (2) screws marked 260b. The SUB 5/5 circuit board can then be removed. (Fig. 8) 12 XH150 M5238AP (XM085A00) Operational Amplifier IC101 1 2 3 4-V 8 7 6 5 Outpu

5、t 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 XS250/350XS250/350XS250/350 13 SUB 1/5 Circuit Board SUB 2/5 Circuit Board SUB 3/5 Circuit Board SUB 4/5 Circuit Board Components side Component

6、s side Components side Components side Components side CIRCUIT BOARDS from T101 to SUB 2/5-CN103 to PA7-CN702from T101 to PA7-CN404 SUB(J) :3NA-V290020 2 SUB(U) :3NA-V290030 2 SUB(H) :3NA-V290040 2 to SUB7-CN508 to PA7-CN201 to PA7-CN301 to PA7-CN705 SUB 5/5 Circuit Board to SUB 2/5-CN103 XS250/350X

7、S250/350XS250/350 14 PA7 Circuit Board 3NA-V289970 1 Components side to SUB 2/5-CN102 from FAN to SUB 3/5-CN401 to SUB 2/5-CN101 to SUB7-CN509 to SUB 5/5-CN603 15 XH150 INSPECTIONS A STEREO and PARALLEL Operation Before performing any of the following adjustments, set the unit as follows: 1. ATTENUA

8、TIONS Maximum 2. Input terminal:Cannon connector pin 2 is HOT, pins 1 and 3 are GROUND 3. OUTPUT VOLTAGE switch:100 V 4. Output terminal:RL = 32 and 64 ohm/more than 150 W 5. Others:Both Channel operations are required, if there is no particular indication. In addition, turn off the filter switches

9、if there is no particular indication. Do not connect the ground of the speaker terminal to the ground on the input side. Adjustment Specifications 1. Fan Test When turning on the power switch, confirm that both fans on the right and left sides regulate at low speed. 2. Muting Test After applying pow

10、er to the unit, the PROTECTION indicator should remain ON for 2.5 +/- 1 second, to indicate that the protection circuitry is operating and the indicator should go out. NO signal is output while this indicator is lit. 3. Idle Current Test Connect the input terminal to the GROUND and adjust the VR201

11、(A channel +), VR202 (A channel -), VR301 (B channel +) and VR302 (B channel -) so that the DC voltage Vb between pin 1 and pin 2 of the CN203 (A channel +), CN204 (A channel -), the CN303 (B channel +) and the CN304 (B channel -) should be 1.0 +/- 0.2 mV. After finishing all tests, adjust the Vb ag

12、ain to 1.0 +/- 0.2 mV. 4. Input Terminal DC offset Connect the input terminal to the GROUND and check that the DC voltage Vdc of the output terminal is 0 +/- 75 mV. 5. Gain Test Check that the OUTPUT is + 28.2 +/- 0.5 dBu when a sine wave of 1 kHz at -10 dBu is applied to the INPUT. 6. Frequency Res

13、ponse Test HIGH CUT switch and LOW CUT switch OFF: When a sine wave of 20 Hz, 1 kHz or 20 kHz at -10 dBu is applied to the INPUT, check that the output is 0.0 +/- 0.5 dB at 20 Hz and - 0.5 +/- 0.5 dB at 20 kHz using 1 kHz as a reference. When a sine wave of 5 kHz, - 10 dBu is applied to the INPUT, c

14、heck that the output is - 3.5 +/- 1.0 dB using 1 kHz as a reference at the filter switch OFF. When a sine wave of 10 kHz, - 10 dBu is applied to the INPUT, check that the output is - 3.0 +/- 1.0 dB using 1 kHz as a reference at the filter switch OFF. When a sine wave of 40 Hz, - 10 dBu is applied to

15、 the INPUT, check that the output is - 3.0 +/- 1.0 dB using 1 kHz as a reference at the filter switch OFF. When a sine wave of 80 Hz, - 10 dBu is applied to the INPUT, check that the output is - 3.5 +/- 1.0 dB using 1 kHz as a reference at the filter switch OFF. 7. Harmonic Distortion Test When a hi

16、gh quality sine wave is applied at 20 Hz, 1 kHz, or 20 kHz, the harmonic distortion should be as follows: *This test should be finished within 30 minutes. Power output level THD 20 Hz1 kHz20 kHz XH150150 W + 150 W (39.0 dBu/ch, 32 ohm, switch=70V) 150 W + 150 W (42.0 dBu/ch, 64 ohm, switch=100V) = 0

17、.1 % = 0.1 % = 0.1 % = 0.1 % = 0.1 % = 0.1 % 16 XH150 8. Channel Separation Test 8-1 Apply a - 5 dBu, 20kHz sine wave into the channel A input. 8-2 Short the input to channel B with a 600 ohm load. 8-3 Set the output of channel A at a reference of 0 dB. 8-4 If the channel B attenuator is set to the

18、same as channel A, channel B output should be less than -65 dB. (RL = 64 ohm) 9. Noise Test 9-1 Set the input attenuator at maximum. 9-2 Short the input to the GROUND with a 600 ohm load. 9-3 The output noise level should be less than - 61 dBm. 9-4 Set the input attenuator at oo, the noise level sho

19、uld be less than - 65 dBu. * Be careful that this is not affected by noise induced during the inspection. 10. Stability Test When a rectangular wave of 10 kHz, - 10 dBu is applied to the input and a capacitor of 10 pF - 0.47 F is connected with a 32 ohm load resistor in parallel, the overshoot and t

20、he ringing should be as follows. Overshoot: Vp/Vo = 1.8 Ringing: less than 5 waves Next, when the 32 ohm load resistor is removed and the load is only the capacitor 10 pF - 0.47 F, the overshoot and the ringing should be as follows. Overshoot: Vp/Vo = 2.5 Ringing: fades away in less than 7 waves and

21、 no oscillation 11. Protection Circuitry Test Check that the relay does not work when you apply a sine wave of + 3.0 dBu at 10 Hz to the input and adjust the input level to obtain a clipped output wave form. Next, check that when you apply a sine wave of 1 Hz, 6.3 dBu to the input, the signal is cut

22、 off within 2 seconds, and the PROTECTION indicator lights up. Finally, check that when no signal is applied, the amplifier resumes to normal operation within 10 seconds. 12. PC Limiter Circuitry Test Check with an oscilloscope that the OUTPUT is as follows when a sine wave of -14 dBu at 1 kHz is ap

23、plied to the INPUT and the output is shorted with an 8 ohm load (+/- 5 %). At this time, check that the CLIP indicator lights up. Output level: Vp-p = 30 V *This test should be finished within 30 minutes. 13. OUTPUT VOLTAGE Switch Check OUTPUT VOLTAGE switch 70V: Check that the OUTPUT is Vp-p = 230

24、V, when a sine wave of 1 kHz at 6.0 dBu is applied to the INPUT. 14. Signal Indicator Test When a sine wave of 1 kHz, -23 dBu is applied to the input, the SIGNAL indicator should light up. Check the output terminal without load. B. Settings after the test The attenuator should be set to oo. The MODE

25、 switch should be set at STEREO. OUTPUT VOLTAGE SWITCH: set to 70 V C. Others 0 dBu = 0.775 V When measuring the noise level, use a DIN audio filter. POWER AMPLIFIER XH150 PARTS LIST The numbers in “QTY” shows quantities for each unit. The parts with “-” in “Parts No.” are not available as spare par

26、ts. The mark “ ” in the remarks column indicates that these parts are interchangeable. Notes: DESTINATION ABBREVIATIONS A : Australian modelJ: Japanese model B : British modelU: U.S. model C : Canadian modelV: General export model（110V） E : European modelW : General export model（220V） H : North Euro

27、pean modelX: General export model I: Indonesian modelY: Export model WARINIG Conponents having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. XH150 CONTENTS OVERALL ASSEMBLY . 2 PA UNIT. 4 ELECTRICAL PARTS. 5 XH150 2 OVER

28、ALL ASSEMBLY 15 410 390 430 440 260 260i 420 410 270 260i 260f 260c 260h 260g 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 40 20 60 70 80 260b 260e 200 6 6 450 UL only 260a 260d 260i 50 XH150XH150 3 *: New partsRANK: Japan only REF NO.PART NO.DESC

29、RIPTIONREMARKSQTYRANK部品名 (V294100) (V294110) (V294120) (V294130) (V294140) (V294280) (V359170) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 10 15 20 30 30 30 30 40 50 60 60 60 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 205 210 220 230 240 250 260 260 260 260 260

30、a 260a 260a 260a 260b 260b 260b 260c 260d 260e 260f 260g 260h 260i 270 280 290 300 330 340 350 360 370 375 380 390 410 420 - - - - - - V3200700 V2945100 V2943900 VZ021200 V2944000 VZ021600 VV103100 VP156800 XU906B00 XU907B00 XU908B00 XU909B00 VU688100 EP600190 - V2941700 V2942900 V2945200 EG340190 V

31、2945700 VB857700 03765330 ET500040 V2943000 VB659000 EP600190 VU859000 V2943100 EP600190 - VV104600 VR779900 - - - - V2944700 V2944800 V2944900 V2945000 AAX00030 AAX00040 AAX00050 AAX00060 AAX00070 AAX00080 AAX00090 VU860400 VN413300 EP600190 VR779900 - - - - VV104600 V2943200 EG340190 V2943500 VU85

32、9100 EG340190 V2943600 EG340190 VP156800 Overall Assembly Overall Assembly Overall Assembly Overall Assembly Overall Assembly Main Chassis Protector Insulation Sheet AC Cord AC Cord AC Cord AC Cord Cord Strain Relief Bind Head Screw Power Transformer Power Transformer Power Transformer Power Transfo

33、rmer Bind Head Screw Bind Head Tapping Screw-B Connector Assembly PA Unit Angle, Fan Packing Bind Head Tapping Screw-B Fan Bind Head Screw Spring Washer Flat Washer Angle, PSW Bind Head Screw Bind Head Tapping Screw-B Power Switch Knob Angle, LED Bind Head Tapping Screw-B Connector Assembly Cord Hol

34、der Bonding Tapping Screw-B Rear Assembly Rear Assembly Rear Assembly Rear Assembly Rear Panel Rear Panel Rear Panel Rear Panel Circuit Board Circuit Board Circuit Board Circuit Board Circuit Board Circuit Board Circuit Board Knob Bonding Tapping Screw-B Bind Head Tapping Screw-B Bonding Tapping Scr

35、ew-B Connector Assembly Connector Assembly Connector Assembly Connector Assembly Cord Holder Angle, Rack Bind Head Tapping Screw-B Front Panel Escutcheon, Power Switch Bind Head Tapping Screw-B Top Cover Bind Head Tapping Screw-B Bind Head Screw XH150 XH150 XH150 XH150 XH150 PP 94V-0 T=0.46 J VCTF 1

36、.25X2 12A UC SJT 3X#18 10A H H05VV-F0.75X3 6A BS H05VV-F 13A SR-6P1 A4.0X8 MFZN2BL SP 5.0X10 MFZN2BL 3.0X8 MFZN2BL 2426&2426 8P 180L 4.0X8 MFZN2BL KDE2412PMS3-6A/A47 4.0X45 MFZN2BL #2 4.0 MFZN2BL 4.0X10X0.8 MFZN2BL 3.0X8 MFZN2BL 3.0X8 MFZN2BL SR200 3.0X8 MFZN2BL 2426&2426 7P 250L CV-100 4.0X8 MFZN2B

37、L SUB7 1/5 SUB7 1/5 SUB7 1/5 SUB7 2/5 SUB7 3/5 SUB7 4/5 SUB7 5/5 RED/D-GRAY 3.0X8 MFZN2BL 3.0X8 MFZN2BL 4.0X8 MFZN2BL 2426&2426 5P 350L INA INB 2426&2426 4P 250L CV-100 4.0X8 MFZN2BL XH150 SR200 4.0X8 MFZN2BL XS,XH 4.0X8 MFZN2BL A4.0X8 MFZN2BL 総組立総組立総組立総組立総組立絶縁電源電源電源電源 + 小電源電源電源電源 + 小 +

38、束線 + + 小座金平座金丸 + 小 + + 束線（） + 束線束線束線束線 + + + + 小 J U,V H,W B A J U,V H,W,A B U,V,H,W,B,A J U,V H,W,B A (VV31190) J U,V H,W,B A J U,V H,W,B A J U,V H,W,B,A (XV420C0) (XV420C0) (XV420C0) (XV420C0) (V295090) (V295010) (V295020) (V295100) 4 6 4 8 4 4 4 2 2 4 2 4 2 8 4 6 5 2 6 4 9 06 08 01 01 01 0

39、1 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 02 01 01 01 (XV420C0) (XV420C0) (XV420C0) *: New partsRANK: Japan only REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK部品名 430 440 450 VY938700 EP600190 VA039300 Cover, Speaker Terminal Bind Head Tapping Screw-B Label Q150/350/500 3.0X8 MFZN2BL + U,V 2 03 01

40、 03 (V294240) (V294250) (V294260) (V294270) XH150XH150 *: New partsRANK: Japan only REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK部品名 * * * 10 20 30 40 50 60 65 70 80 V2941700 - V3303100 - VV086500 V2899700 EG330290 - - VQ074600 PA Unit PA Unit Heat Sink Insulation Sheet Grease Support Circuit Board Bind

41、Head Screw Cord Binder Holder Angle Bind Head Tapping Screw-B TBM51W T=0.15 G-746 H=7.4 B=5.5 PA7 SP 3.0X8 MFZN2Y WC-2L PIN GOOD XH 3.0X12 MFZN2BL 放熱支柱 + 小束線止押金具 + PA 7 PA 7 (V294560) (0412125) (V362150) (V294380) 4 6 6 2 20 01 01 01 4 PA UNIT 80 20 20 20 70 80 40 40 40 60 80 40 80 10 6 50 90 XH150 5 *: New partsRANK: Japan only REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK (XV024B0) (XV420C0) (XV420C0) (XV420C0) (XV420C0) (XV420C0) (XV420C0) (XV420C0) ELECTRICAL PARTS * * * * * * * *