Casio_EG-5_Guitar_Service_Manual电路图.pdf

ELECTRIC GUITAR EG-5 (without price) RadioFans.CN 收音机爱 好者资料库 INDEX 2 CONTENTS SPECIFICATIONS GENERAL Body:Inner; Die cast aluminum Outer; High impact PS resin Neck:Hard maple Pickup:CASIO original Guitar controls:Main Volume, Guitar Mix, Guitar Volume, Distortion ON/OFF, Distortion Drive Tape recorder:Recording system: Stereo Playback system: Stereo (monaural speaker and monaural guitar output) Tracks: 4-track, 2-channel stereo Tape type: Normal Tape speed: 4.76 cm/sec. Fast forward/reverse time: approximately 150 sec. (C-60) Recording level: Auto (automatically adjusted to prevent distortion) Basic functions: REC, PLAY, F.FWD, STOP/EJECT, PAUSE Other functions: Tape pitch adjustment (+/-3%), Auto stop Built-In speaker:10 cm dia. 2.0 W input rating: 1 pce. Terminals:Line In Jack stereo mini jack, input impedance: 15 ohms Guitar Out Jack monaural standard jack, output impedance: 4.5 ohms, output voltage: 0.25 V (RMS) Maximum Phones Jack Stereo mini jack, output impedance: 4.5 ohms, output voltage: 0.50 V (RMS) Maximum AC Adaptor Jack (DC 9 V) Power source:DC: 6 AA size dry batteries Battery life: Approx. two hours (R14P/SUM-2) Approx. four hours (LR14/AM2) AC: AC Adaptor AD-5 Power comsumption:7.7 W Dimensions (HWD):75 x 966 x 324 mm (2-15/16 x 38-1/16 x 12-3/4 inches) Weight:3.2 kg (7.0 lbs) including batteries ELECTRICAL Current drain with 9 V DC: No Sound Output 92 mA 20% Maximum volume750 mA 20% Speaker Output Level (Vrms with 8 ohms load) with 6th string picked at 12th fret from 5th string780 mA 30% Phone Output Level (Vrms with 8 ohms load) with 6th string picked at 12th fret from 5th string 65 mA 30% Guitar Output Level (Vrms with 8 ohms load) with 6th string picked at 12th fret from 5th string 32 mA 30% Minimum Operating Voltage: 6.3 V Specifications. 2 Block Diagrams. 3 Disassembly Instructions . 5 Tuning . 6 Adjustment . 7 Circuit Description . 8 Wiring Diagram. 9 Schematic Diagrams. 10 Exploded View. 14 Parts List. 15 RadioFans.CN 收音机爱 好者资料库 3 BLOCK DIAGRAMS Pickup Hum Cancel VR11 Guitar Volume Distortion Changeover T54, T55 Distortion Circuit Mixer IC53 Guitar MIX VR52 Distortion Button Flip-Flop T51, T52 HeadHead Amp. TA8142AP IC41 Mute T45, T46 Mute T43, T44 Mixer R IC42 Mixer L IC42 Line IN Line IN Amp. HOT1 HOT2 Filter Distortion Volume VR51 Bias Circuit Leaf Switch Motor Cassette Mechanism REC Switch S41 VR31 VR32 Tape Speed Volume SVC MVC (Motor Drive Signal) T42 T41, L41 BIAS L-CH R-CH + A B GUITAR-R TAPE-R AUX-R GUITAR-L TAPE-L AUX-L RAUX LAUX T21, T22 VR13 A B IC53 RadioFans.CN 收音机爱 好者资料库 4 A B Main Volume VR53 RVOUT LVOUT Mixer Headphone Amp. LA4525 IC21 Power Amp. LA4127 IC13 Mute T23 Phone Output Guitar Output Speaker Power Supply Circuit D22, T24 Power Switch S21 VC 9 VVCC 9 V DC IN 9V Amp. Amp.Clipper Band-Pass Filter IC51 VR51 Distortion Volume DI505DI508 IC51 IC52T56 Filter IC52 + IC12 5 DISASSEMBLY INSTRUCTIONS Note: EG-5 has a detachable neck. So do not loosen the four black screws attaching the neck to the body at usual repairs. Only when replacing the neck, remove the screws. Black Screws To open the lower body 1. Remove the battery cover. 2. Remove the eighteen screws holding the lower body. 3. Open the lower body. To disassemble the cassette mechanism 1. Open the lower body. 2. Desolder PC cable, JD cable and PH cable on JCM370-MA4M PCB. 3. Remove three screws on JCM370-MA2M PCB and four screws on JCM370-MA4M PCB. 4. Remove all buttons from the cassette mechanism. 5. Remove the four screws holding the cassette mechanism. 6. Remove the cassette mechanism from the upper body. To disassemble the pickup 1. Remove all strings from the guitar. 2. Open the lower body. 3. Desolder the cable of the pickup on JCM370-MA1M PCB. 4. Remove two black screws on the upper body. To disassemble the bridge 1. Remove all strings from the guitar. 2. Remove four screws on the bridge. To disassemble the neck 1. Remove all strings from the guitar. 2. Remove the four black screws on the lower body. 6 TUNING Most guitar players tune their guitar by themselves as they like. Do not adjust tunings of a customers guitar at usual repairs, because the tunings may be re-adjusted by a customer. Only after replacing the neck, the bridge or the pickup, adjust a certain tuning item shown in the following table. Tools/Equipments required 4 mm hexagon key (Accessory tool) 1.5 mm hexagon key (Accessory tool) Guitar tuning meter TUNING PROCEDURE Please refer to the tuning instructions in the operation namual also. To adjust warp of neck 1. Check the space between a string and the 10th fret when pressing the string at the 1st fret and at the 19th fret. And check all strings. 2. If the space exceeds 0.3 mm, straighten the neck by turning the nut in the head clockwise with a 4 mm hexagon key. To adjust pickup height 1. Press a string at 22nd fret. 2. Use a screw driver, adjust a height of the pickup to be 2 mm off from the string by turning two screws at both ends of the pickup. To adjust string height 1. Use a 1.5 mm hexagon key, adjust a height of the 1st string to be 2 mm above the 14th fret by turning two hexagon socket screws at the 1st saddle in the bridge. 2. Adjust height of other strings by the same way. To adjust octave pitch 1. Use a guitar tuning meter, tune the 1st string at open string to the standard pitch. 2. Use a guitar tuning meter, compare pitch of two tones, a tone at the 12th fret with a harmonic*. 3. If pitch of the tone at the 12th fret is sharper over 3 cents than pitch of the harmonic tone, turn the adjustment screw clockwise. 4. If pitch of the tone at the 12th fret is flatter over 3 cents than pitch of the harmonic tone, turn the adjustment screw counterclockwise. 5. Repeat steps 1 to 4 until the differnce of pitch between two tones is within 3 cents. 6. Adjust octave pitch of other strings. * Harmonic: An overtone produced by touching a string above the 12th fret with a finger and by picking the string just before freeing the string. Items to be tunedReplaced Part Warp of neckNeck Pickup heightPickup String heightBridge Octave pitchBridge 7 ADJUSTMENT Equipments required Oscilloscope Frequency counter Test tapes, MTT-111N (0004 5032) and MTT-113N (0004 5033) Two 8-ohm resistors Pre-adjustment procedure 1. Clean the head and all tape handling surfaces using standard cleaner and cotton swabs. 2. Connect an 8-ohm dummy load to headphone jack of each channel. 3. Set the main volume to the maximum. 4. Set the tape speed volume to the center position. Head azimuth adjustment Never use a magnetized screwdriver for this adjustment. The head azimuth adjustment screw is located just under the notch which can be seen when opening the cassette door. 1. Connect a oscilloscope to the dummy loads. 2. Set a tape MTT-113N holding the door open, and playback the tape. 3. By turning the adjustment screw slowly, adjust for amplitude of both channels at maximum and adjust for the waveforms in the same phase reading on the oscilloscope. 8-ohm Dummy Load Phone Jack 8-ohm Dummy Load R-ch L-ch EG-5 Oscilloscope Ch 1 Ch 2 OK NG NG Tape speed adjustment The tape speed adjustment volume VR32 is located on M370-MA3M PCB. 1. Connect a frequency counter to the dummy load. 2. Playback a test tape MTT-111N. 3. By turning the volume, adjust for 3000 Hz 30 Hz reading on the frequency counter. Phone Jack 8-ohm Dummy Load EG-5 Frequency Counter 8 CIRCUIT DESCRIPTION Pickup The pickup is a humbacking pickup, which consists of the two coils connected in series opposition. Each coil has the same turns but it has the opposite polarity of the core to the other one. Hum Cancel Circuit By adding two outputs from the pickup, the hum cancel circuit removes a hum noise, it also doubles amplitude of the signal. Distortion Circuit The distortion circuit adds a distortion effect to the original signal from the pickup. The circuit cuts off peak of the waveform, it also produces a sound signal like a howling sound. Head Amp. (TA8142AP) The internal block diagram is shown in Figure 5. S S N N Noise Signal NoiseNoise Signal Humbacking Pickup Output2Output1 12 13 ALC PIN1 PNF1 PNF2 PIN2 RFN1 RIN1 ALC RIN2 RNF2 GND ROt2 ROt1 10 9 Ch2 Ch1 Ch2 Ch1 16 15 14 11 Vref2 Vref1 1 2 POt1 3 Iref 8 7 POt2 6 VCC 54 CG 9 WIRING DIAGRAM HOT1 HOT2 SHIELD PU-B PU-W PU-BK SP+ SP- PS-BL PS-W AG VCC GVOL RVOUT LVOUT RAUX LAUX MVC JA-8 JA-7 JA-6 JA-5 JA-4 JA-3 JA-2 JA-1 JA-8 JA-7 JA-6 JA-5 JA-4 JA-3 JA-2 JA-1 VC LAUX RAUX LVOUT RVOUT AMPOUT SP+ JB-7 JB-6 JB-5 JB-4 JB-3 JB-2 JB-1 JB-7 JB-6 JB-5 JB-4 JB-3 JB-2 JB-1 MVC AG VCC MIXOUT PG JC-5 JC-4 JC-3 JC-2 JC-1 JC-5 JC-4 JC-3 JC-2 JC-1 VC MVC A PG SVC B JF-6 JF-5 JF-4 JF-3 JF-2 JF-1 JF-6 JF-5 JF-4 JF-3 JF-2 JF-1 A B PV-BL PV-W PV-BL PV-W AG VCC GVOL GOUT RVOUT LVOUT LOUT ROUT JE-8 JE-7 JE-6 JE-5 JE-4 JE-3 JE-2 JE-1 PH-BR PH-R PH-O PH-BK GND/BIAS L-CH R-CH FG PC-O PCW VC SVC A B MVC PG JD-4 JD-3 JD-2 JD-1 JE-8 JE-7 JE-6 JE-5 JE-4 JE-3 JE-2 JE-1 Pickup Speaker MA1M MA2M MA3M MA4M CN1M Cassette Mech 10 SCHEMATIC DIAGRAMS AMP PCB JCM370-MA1M 11 I/O PCB JCM370-MA2M, MA3M 12 CASSETTE PCB JCM370-MA4M 13 CONSOLE PCB JCM370-CN1M 14 23 4 4-3 4-4 4-1 4-1 4-6 4-2 4-5 S-10 S-6 S-1 1 JB JC S-4 22-2 S-4 JA S-4 S-8 S-7 22-3 S-9 S-8 22-1 S-9 S-7 S-8 22 S-2 2 3 S-4 S-8 S-2 S-3 JF 1 PH S-11 7 19 13 14 15 16 17 18 9 24 25 JD S-1 S-4 10 1 PV S-2 S-2 6 12 11 20-1 20 21 25 24 8 JE 5 5-3 5-2 5-1 S-1 5-4 EXPLODED VIEW Notes:1.Prices and specifications are subject to change with- out prior notice. 2.As for spare parts order and supply, refer to the GUIDEBOOK for Spare parts Supply, published seperately. 3.The numbers in item column correspond to the same numbers in drawing. PARTS LIST EG-5 ELECTRICAL PARTS LIST NItemCode No.Part NameSpecificationQ FOB Japan N.R. Yen Unit Price R PCB ASSY M370-MA123M N16922 9140PCB Assy M370-MA123MM140005*1 1B D212390 0371DiodeDSK10B-BT-T 1B D222310 7813Zener DiodeRD10ESB3-T1-T 1A ND232360 2408Zener DiodeRD3.0ESB1-T1-T 1B IC11, IC122114 1799ICM5218APR 2B IC132114 0070ICLA4127 1A IC212114 2632ICLA4525 1A J21, J223612 0711Mini JackYKB21-5101 2A J233612 0665Phone JackYKB21-5006 1A J243501 7049DC JackHEC2305-01-330 1A NS213412 1407Slide SwitchHSW3022-01-0401A T22, T222220 1409Transistor2SC1740SR-TP-T 2B T232253 0420Transistor2SD1468SR,S-TP-T1B T242253 0357Transistor2SD2008Q,R-T105-T 1A NVR112765 1701VolumeEVJ06VFA3B14 1A VR132760 2177Semi-Fixed ResisterV8K4-11B10K 1C NVR312765 1631VolumeEVLHFKA05B23 1A VR322765 0049Semi-Fixed ResisterV8K4-11B5K 1C JA3719 4361Ribbon Cable M370ADF5H08155-8000M1C JB3719 4368Ribbon Cable M370BDF5H07120-800080001C JC3719 4375Ribbon Cable M370CDF5H05215-800080001C JF3719 4389Ribbon Cable M370FDF5H06075-8000M1C PV3749 4382Ribbon Cable M370HDF0H02120-802580251C PCB ASSY M370-MA4M N26922 9150PCB Assy M370-MA4MM140006*1 1B DI412390 1344Diode1SS133T-77-T 1C NIC412114 3500ICTA8142AP 1A IC422114 1799ICM5218APR 1B NL413841 1344Bias CoilMS-102-31 1B NS413412 1337Slide SwitchSSCJ24S-1-1 1A T41T462220 1409Transistor2SC1740SR-TP-T 6B PCB ASSY M370-CN1M N36922 9170PCB Assy M370-CN1MM140007*1 1B DI505, DI5072390 1344Diode1SS133T-77-T 6C DI5042390 1323DiodeRB100A-T32-T 1C DI506, DI5082390 1967DiodeRB441QT-77 2C DI5102360 1631Zener DiodeRD5.6ESB1-T1-T 1B IC51IC532114 1799ICM5218APR 3B LED51, LED522370 0112LEDLN28RPX-(TT8) 2C NS513412 1400Tact SwitchEVQ QJJ 05Q 1B T51T532220 1409Transistor2SC1740SR-TP-T 3B T54T562240 1149FET2SK105E-T 3B NVR512765 1652Slide VolumeEWA KFEC10BF5 1A NVR522765 1645Slide VolumeEWA KFEC10B23 1A NVR532765 1638Slide VolumeEWA KA0C10B23 1A NJE3719 4396Ribbon Cable M370EDF5H08110-8000M1C Notes: N New parts M Minimum order/supply quantity R Rank 15 MECHANICAL PARTS LIST FOB Japan NItemCode No.Parts NameSpecificationQ N.R.YenR Unit Price NJD3719 4403Ribbon Cable M370DDF5H04110-3535M1C NPH6923 1071Shield Cable M370M440021A*11C N46922 8911Neck AssyM240006A*11B N4-10009 9175Bullit-Shaped NutHOUDAN-M51B N4-25860 8736Tuning Peg1DC41-07M-L6A N4-30009 9171String GuideRG130Ni2C N4-40009 9173Pan Wood Screw2.4X162C N4-50009 9172Pan Wood Screw2.1X1012C N4-60009 9174NutN06-42(BLACK)1A N56922 9502Bridge AssyM340002B*11A N5-10009 9176Hexagon Socket ScrewM3X1012B N5-26923 0611Bridge SaddleM412358A-16B N5-36923 0621Bridge SpringM412359A-16B 5-40007 8878Pan ScrewM3X166B N63831 0742SpeakerS10JA22A1B N75860 8708Cassette Mechanism ADR2001VS1A N85860 9149PickupCAH-F21A N96923 0690Cassette Door (Black)M340004*11B N96923 0710Cassette Door (White)M340004*21B N106923 0680Cassette Door SpringM412361-11B N116922 9510Rotary Knob 370 M312224-11B N126922 9520Slide Knob 370 M312223-13B N136922 9530C Button RECM211805-11C N146922 9540C Button PLAYM211805-21C N156922 9550C Button REWM211805-31C N166922 9560C Button FWDM211805-41C N176922 9570C BUtton STOPM211805-51C N186922 9580C Button PAUSEM211805-61C N196922 9610T ButtonM312225-11C N206923 0670Upper Body (Black)M240003*11C N206923 0700Upper Body (White)M240003*21C N20-16923 0820Pick Guard 370M312236-11C N216922 8150Core 370M111826-11C N226923 0632Lower Body (Black)M240004B*11C N226923 0652Lower Body (White)M240004B*21C N22-16923 0740Battery Spring (-) 370M412347-11B N22-26923 0750Battery Spring (+) 370 M412348-11B N22-36923 0760Battery Spring (+-) 370M412349-11B N236923 0640Battery Cover (Black)M340003*11B N236923 0660Battery Cover (White)M340003*21B 246913 3520Strap PinM43406-12C 256908 4730Strap-Pin NutM42806-22C NS-15021 2246Screw4X166C S-20009 2680Screw4X810C S-30009 2681Screw with Washer4X81C S-40009 2682Screw2.6X811C S-65111 5333Screw4X61C S-75111 5384Screw4X123C S-80008 6417Screw4X107C NS-95860 1218Screw4X108C NS-100009 9179Wood Screw4.5X324C S-115111 1362Screw3X84C Notes: N New parts M Minimum order/supply quantity R Rank 16 FOB Japan NItemCode No.Parts NameSpecificationQ N.R.YenR Unit Price N1015 0007Demo TapeSO-911B N3613 1393Hexagon Key 4mm4X70X251B 6913 5900Hexagon Key 1.5mmM410113-11B Notes: N New parts M Minimum order/supply quantity R Rank 17 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926 Sep, 1995