Yamaha-F-20-Service-Manual电路原理图.pdf

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1、SERVICE MANUAL HAMAMATSU, JAPAN 1.338K-713 K Printed in Japan 2001.09 011551GA CONTENTS SPECIFICATIONS . 3 PANEL LAYOUT. 3 CIRCUIT BOARD LAYOUT. 4 BLOCK DIAGRAM . 4 DISASSEMBLY PROCEDURE . 5 CIRCUIT BOARDS . 7 IC BLOCK DIAGRAM. 8 INSPECTIONS. 8 PARTS LIST OVERALL CIRCUIT DIAGRAM GUITAR AMPLIFIER Thi

2、s document is printed on chlorine free (ECF) paper with soy ink. RadioFans.CN 收音机爱 好者资料库 2 F-20 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

3、specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in per- sonal injury, destruction of expensive components and failure of the p

4、roduct to per form as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative. IMPORTANT:This presentation or sale of this manual to any individual or firm does not consti

5、tute authorization, certifica- tion, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form. The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service departments of

6、Yamaha are continually striving to improve Yamaha products. Modifications are, therefor, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING:Static di

7、scharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss). IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work befor

8、e you apply power to the unit. 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

9、Agency (and possibly other entities) to cause cancer and / or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL / ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do

10、not inhale solder fumes or expose eyes to solder / flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord WARNING:THIS APPARATUS MUST BE EART

11、HED IMPORTANT: The wires in this main lead are coloured in accor- dance with the following code: GREEN-AND-YELLOW: EARTH BLUE: NEUTRAL BROWN: LIVE As the colours of the wires in the main lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proc

12、eed as follows: The GREEN-and-YELLOW wire must be connected to the terminal in the plug that is marked with the letter E or the safety earth symbol (or coloured GREEN or GREEN-and-YELLOW). The BLUE wire must be connected to the terminal that is marked with the letter N (or coloured BLACK). The BROWN

13、 wire must be connected to the terminal that is marked with the letter L (or coloured RED). This applies only to products distributed by Yamaha Kemble Music (U. K.) Ltd. WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those o

14、riginally installed. RadioFans.CN 收音机爱 好者资料库 3 F-20 Rated Output Power:20W Speaker:20cm x 1 Controls:VOLUME, GAIN, MASTER VOL., TREBLE, MIDDLE, BASS, CH SELECT switch (A/B) Input/Output Terminals:INPUT, AUX IN, PHONES Output Impedance:100 (PHONES) Power Consumption:30W/100V (J) 25W/120V (UL,CSA) 25W

15、/230V (E,BS) Power Requirements:U.S. and Canadian models: 120V, 60Hz General model: 230V, 50Hz Dimensions (W x H x D):357 x 330 x 197mm (14.1 x 13 x 7.8) Weight:6.5kg (14 lbs 5 oz) SPECIFICATIONS PANEL LAYOUT ? INPUT ? CH SELECT A/B (Channel Select Switch A/B) A Channel ? VOLUME * No sound is produc

16、ed when the VOLUME knob is set to 0. B Channel ? GAIN ? MASTER VOL. * No sound is produced when the MASTER VOL. knob is set to 0. ? Tone Controls ? TREBLE ? MIDDLE ? BASS ? AUX IN * Use the volume control on the audio device to control its volume level. ? PHONES * The speaker produces no sound when

17、a pair of headphones is connected to this jack. ? POWER 4 F-20 CIRCUIT BOARD LAYOUT MAIN 1/2 MAIN 1/2 MAIN 1/2 AC Cord Power Transformer MAIN 2/2 MAIN 2/2 BLOCK DIAGRAM +B +12V -12V -B OP AMP IC1 31 OP AMP IC2 31 OP AMP IC1 57 OP AMP IC2 57 POWER AMP IC3 14 INPUT CH. SELECT SW CH. A CLEAN IC1. IC2 C

18、H. A CLEAN CH. B DRIVE CH. B DRIVE +B VOLUME GAIN MASTER FUSE FZ1 INDICATOR BASS MIDDLE TREBLE PASSIVE TYPE TONE CONTROL POWER SUPPLY CIRCUIT POWER TRANSFORMER VR1 VR2 VR3 VR4VR5VR6 4 Speaker PHONES AUX IN CN2 4P CN1 2P CN3 3P CN4 5P CN5 5P POWER SWITCH SW1 SW2 T2 T1 T4 T1 T2 G U, C, S, BS MAIN 1/2

19、MAIN 2/2 T3 +12V -12V +12V -12V +12V -12V +12V -12V +B -B JK3 JK2 JK1 V695450 ? Top View? Side View ? Front View 5 F-20 DISASSEMBLY PROCEDURE 30 x 4 Speaker B Pre-Main UnitPre-Main Unit ABack Board 1.Pre-Main Unit (Time required: about 1 min) 1-1Remove the speaker wires. 1-2Remove the four (4) screw

20、s marked 30. The pre-main unit can then be removed by sliding it backward. (Fig.1) 2.Speaker (Time required: about 1 min) 2-1Remove the four (4) screws marked A. The back board can then be removed. (Fig.1) 2-2Remove the four (4) screws marked B. The speaker can then be removed. (Fig.1) 3.MAIN 1/2 Ci

21、rcuit Board (Time required: about 3 min) 3-1Remove the pre-main unit. (See procedure 1) 3-2Remove the six (6) knobs marked P100 and the six (6) hexagonal nuts marked C. (Fig.5) 3-3Remove the hexagonal nuts marked A120 and the hexagonal nuts marked A140. (Fig.5) 3-4Push the hooks of the spacer suppor

22、t (at the arrow symbol area of illustration) with a needle-nose plier to unlock. The Main 1/2 circuit board can then be removed. (Fig.2) 30: Truss Head Screw 4.0X25 MFZN2BL (VN347600) (Fig. 1) MAIN1/2 Circuit BoardMAIN1/2 Circuit Board Needle Nose PlierNeedle Nose Plier MAIN1/2 Circuit Board P40P40P

23、40 Needle Nose Plier (Fig. 2) A: Bind Head Tapping Screw 4.0X25 FCRM3-BL (EI340256) B: Bind Head Screw 4.0X20 ZMC2BL (VB403600) 6 F-20 MAIN 1/2 MAIN 2/2 P100, CA120 P60P70C80 A140 P70P60P40P40 Power Transformer 4.MAIN 2/2 Circuit Board (Time required: about 3 min) 4-1Remove the pre-main unit. (See p

24、rocedure 1) 4-2Remove the screw marked C80. The MAIN 2/2 circuit board can then be removed. (Fig.5) 5.Power Transformer (Time required: about 4 min) 5-1Remove the pre-main unit. (See procedure 1) 5-2While pushing down the nut marked P70 with a spanner, remove the two (2) screws marked P60. The power

25、 transformer can then be removed. (Fig.4) A120: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060) A140: Hexagonal Nut 12.0 14X2 MFNI33 (ES200210) C80: Bind Head Tapping Screw-1 3.0X16 MFZN2BL (EP030310) P70: Hexagonal Nut #1 4.0 MFZN2Y (VB837300) P60: Pan Head Screw 4.0X10 MFZN2BL (V7018000) P100: Knob (V695

26、5100) (Fig. 5) P60P70P60P70P60P70 Power TPower TransformerransformerPower Transformer (Fig. 4) C80C80C80 MAIN1/2 Circuit Board MAIN2/2 Circuit Board MAIN1/2 Circuit Board MAIN2/2 Circuit Board MAIN1/2 Circuit Board MAIN2/2 Circuit Board (Fig. 3) 7 F-20 A INPUT CH SELECT A/B VOLUMEGAINMASTER VOLUMETR

27、EBLE A A MIDDLEBASSAUX INPHONES A to Speaker from Power Cord to Power Transformer to Main 2/2 CN5 from Power Transformer MAIN1/2 Circuit Board CIRCUIT BOARDS MAIN 1/2 (J, U):CNA-V733720 1 MAIN 1/2 (H, B):CNA-V733730 MAIN 2/2 (J, U):CNA-V733720 MAIN 2/2 (H, B):CNA-V733730 to MAIN 1/2 CN4 MAIN 2/2 Cir

28、cuit Board Component Side Component Side VERSION FUSE RATE INDICATION J, U250V 500mA E, BS250V T160mAL Must be erased Must be erased 8 F-20 INSPECTIONS 1.Preparation To inspect the main unit, the following jigs are required. CD player Headphones Before turning the power on, set all the knobs on the

29、panel to 0. Raise the CH SELECT switch to select channel A. 2.Power supply Connect the power cord to the suitable power supply socket for each version. (UC - 120V, E&BS - 220V) 3.Inspection procedure 3-1Input the audio signal of CD player to the AUX-IN jack. 3-2Make sure that the sound becomes gradu

30、ally larger (or smaller) according as you turn the VOLUME knob to the right (or left). 3-3Make sure that the high frequency is gradually emphasized (or eliminated) as you turn the TREBLE knob to the right (or left). 3-4Make sure that the middle frequency is gradually emphasized (or eliminated) as yo

31、u turn the MIDDLE knob to the right (or left). 3-5Make sure that the low frequency is gradually emphasized (or eliminated) as you turn the BASS knob to the right (or left). 3-6Make sure that the sound becomes larger when you depress the CH SELECT switch to select channel B. Besides, make sure that t

32、he sound becomes gradually distorted according as you turn the GAIN knob to the right. 3-7Make sure that the sound becomes gradually larger (or smaller) according as you turn the MASTER VOLUME knob to the right (or left). 3-8Raise the CH SELECT switch to select channel A and make sure that the audio

33、 signal sounds over the speaker. 3-9Connect headphones to the PHONES jack. Make sure that the speaker does not produce any sound and audio signal sounds over the headphones. 3-10Set all the knobs on the panel to 0 and finish the inspection. IC BLOCK DIAGRAM BA4558 (XO078A00) Dual Operational Amplifi

34、er 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 +- +- MAIN: IC2,IC3 F-20 1 PARTS LIST GUITAR AMPLIFIER CONTENTS OVERALL ASSEMBLY .2 PRE-MAIN UNIT .4 ELECTRICAL PARTS .6 WARNING Components h

35、aving special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. The numbers in “QTY” shows quantities for each unit. The parts with “-” in “Part No.” are not available as spare parts. The second letter of the shaded () part number i

36、s I, not one. The second letter of the shaded () part number is O, not zero. F-20 2 OVERALL ASSEMBLY 60 20 10 C40 C60 C50 C60 C50 C30 C30 B A C20 C70 C90 C80 50 30 C120 C100 C110 OVERALL CABINET ASSEMBLY Pre-Main Unit A Speaker Back Board Pre-Main Unit (See P. 4) F-20 3 REF NO.PART NO.DESCRIPTIONREM

37、ARKSQTYRANK RANK: Japan only*New parts * * * * * * * * * 10 20 20 20 20 30 50 60 60 60 C10 C20 C30 C40 C50 C60 C70 C80 C90 C100 C110 C120 A B - - - - V6954600 - - - - VN347600 ET500040 - - - V6954600 - V5969000 21770200 V6327200 V6327300 V8480700 V6327400 EP030310 03765580 V7363300 VN729100 XO175A00

38、 EI340256 VB403600 OVERALL ASSEMBLY Overall Assembly Overall Assembly Overall Assembly Overall Assembly Overall Assembly Pre-Main unit Pre-Main unit Pre-Main unit Pre-Main unit Truss Head Screw Flat Washer Label Label Label OVERALL CABINET ASSEMBLY Overall Cabinet Assembly Cabinet Assembly Corner Pr

39、otector Oval Head Screw Handle Handle Holder Oval Head Screw Foot Bind Head Tapping Screw-1 Flat Washer Name Plate Bind Head Tapping Screw-1 Speaker Unit Bind Head Tapping Screw Bind Head Screw 4.0X25 MFZN2BL GA-10 3.0X12 MFZN2BL KPBO KAH1D-205 KPBO KAH3D400-A 4.0X30 MFZN2BL KPBO KRRU19 3.0X16 MFZN2

40、BL 3.0X8X0.5 MFZN2BL F-20 3.0X10 MFZN2BL 4ohm 30W 4.0 X 25 FCRM3-BL 4.0 X 20 ZMC2BL F20 (V695390) (V736090) (V736100) (V736110) J(V695450) U(V736130) H(V736140) B(V736150) J(V695470) U(V736160) H,B(V736170) F20 (V695500) 4 4 6 12 2 2 4 4 4 2 4 4 01 01 01 01 01 01 01 01 F-20 4 A10 A70 A60 A40 A10 A30

41、 A80 A90 A20 P60 P40 P60 P30 P75 P70 P50 P10 P20 P90 P80 A50 P100 P120P110 A100 A110 A130 A140 A120 PRE-MAIN UNIT F-20 5 REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK RANK: Japan only*New parts * * * * * * * * * * * * * * * * * * * * * * * P10 P20 P30 P30 P30 P30 P40 P50 P60 P70 P75 P80 P90 P100 P110 P12

42、0 A10 A10 A20 A30 A40 A50 A50 A50 A60 A70 A70 A70 A70 A80 A90 A100 A110 A120 A130 A140 - - - - V6954800 V6954900 - - - - V7511400 V7017600 V7018000 VB837300 VB501900 V7018100 V7554300 V6955100 ET900050 - - - - - V7337200 V7337300 VV849300 V7356900 V7054700 XZ805A00 XZ806A00 XZ807A00 VV104600 V628670

43、0 V6286900 V6287000 V6287100 V7356700 V7356800 ET800150 VL802300 LX200060 VB508700 ES200210 PRE-MAIN UNIT Pre-Main unit Pre-Main unit Pre-Main unit Pre-Main unit Chassis Panel Sheet Amp Kit Amp Kit Amp Kit Amp Kit Spacer Support Heat Sink Pan Head Screw Hexagonal Nut Spring Washer Pan Head Screw But

44、ton Knob Toothed Lock Washer-B Earth Mark Amp Kit Amp Kit Amp Kit Amp Kit Circuit Board Circuit Board Insulation Sheet Sleeve Power SW Transformer Transformer Transformer Cord Holder Cord Cord Cord Cord Cord Strain Relief Cord Strain Relief Toothed Lock Washer-A Flat Washer Hexagonal Nut Flat Washer

45、 Hexagonal Nut PINGOOD LCC-10 4.0X10 MFZN2BL #1 4.0 MFZN2Y 4.0 MFZN2Y 3.0X10 MFZN2BL GA-RED 4.0 MFZN2BL BFG-20AD 19X24 12SWS0220 SDDJE1-A-2 CV-100 J VCTF UC 3 SJT 18/3 E 3 HO5VV-F UK 3 HO5VV-F KR-61 KITAGAWA KF-41 KITAGAWA 9.0 MFZN2Y 9X14 0.5 FNM3 9.0 12X2 MFNI33 18X12.5 0.6 MFZN2 12.0 14X2 MFNI33 F

46、20 J(V695450) U(V736130) H(V736140) B(V736150) J(V733660) U(V733670) H(V733680) B(V733690) CH SELECT A/B VOL,GAIN,MASTER VOLUME TREBLE,MID,BASS (CA06069) J(V733660) U(V733670) H(V733680) B(V733690) J,U H,B POWER SW J U H,B J U H B 2 2 2 2 2 6 2 01 01 01 01 01 01 01 01 REF NO.PART NO.DESCRIPTIONREMARKSQTYRANK F-20 6 RANK: Japan only*New parts ELECTRICAL PARTS * * * * * * * * C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 CN1 CN2 CN3 D01 D02 DB1 FZ1 FZ1 IC1 IC2 IC3 JK1 JK2 J