Akai X-V Service Manual Download Page 38 | Manualshive

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Summary of Contents for X-V

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Page 3: ...LOCATIONS 4 IV DISMANTLING OF TAPE TRANSPORT UNIT AMPLIFIERS 5 V TAPE TRANSPORT MECHANISM 7 VI MECHANISM ADJUSTMENT 11 VII AMPLIFIER ADJUSTMENT 14 VIII HEAD ADJUSTMENT 18 IX MAINTENANCE PROCEDURE 18 X TROUBLE SHOOTING CHART 19 XI REPLACEMENT PARTS TABLE 21 XII SCHEMATIC DIAGRAM ...

Page 4: ... DURABILITY POWER OUTPUT 500 V AC for more than one minute duration MAIN OUTPUT 2 W maximum per each channel total4 W DIN OUTPUT INPUT LEVEL LINE INPUT MIC INPUT DIN INPUT Impedance 8 Ohms 0 5 V at Volume maximum Impedance 3 5 K Ohms 50 rnV at 0 VU indication Impedance 220 K Ohms 0 5 mV at 0 VU indication Impedance 3 9 K Ohms 20 rnV at 0 VU indication Impedance 82 K Ohms FAST FORWARD AND REWIND TI...

Page 5: ... measured values into decibels 4 TOTAL HARMONIC DISTORTION FACTOR 1 Kc s Audio Distortion X V Oscillator meter Connect the measuring instrument as shawn above and record the 1 000 Hz sine wave at 0 VU Playback the resultant signal and measure the overall distortion factor Measure the noise level of the tape recorder with the tape removed connect the audio oscillator directly to the distortion mete...

Page 6: ... that the VU meter needle indicates 0 VU 3 Under the condition described in 2 lower the input 10 db by means of the attenuator 4 Record the spot frequency in the range of 30 Hz to 25 000 Hz from the audio frequency generator PLAYBACK 5 Set the Record Playback Knob in to Play position 6 Set the Speed Selector Switch on 7 1 2 or 3 3 4 position 7 Connect a V T V M and 8 2 resistor across the speaker ...

Page 7: ... ind Button 1 VU 1 Ieter Right VU Meter Left Tone Control Left Amplifier Switch Volume Control Left Input Jack Left Input Selector Volume Control Right Input Jack H ight Tone Control H ight Tape Speed Selector Battey Voltage Indicator Meter Battery Charge lndicator _ Take up Heel Shaft Heset Button Index Counter Tape Holder ...

Page 8: ...OYER PANELS removed making mechanism control adjustment accessible 2 Remove RETAINING SCREWS marked a and b by using a Philips head screw driver and remove HEAD COYER CASE COVER A c d CASE COVER C 4 Remove RETAINING SCREWS marked a to d by using a Philips head screw driver and remove CASE COYERS A C b d c CASE COVER B 6 Loosen RETAINING SCREW a and remove CASE COYER D Then remove RETAINING SCREWS ...

Page 9: ...eakers are possible PRINTED BOARD X5 504 11 Remove RETAINING SCREWS marked a to c by using a Philips head screw driver and remove PRINTED BOARD BLOCK X5 504 SIDE FRAME B 8 Remove RETAINING SCREWS marked a to d by using a Philips head screw driver and remove SIDE FRAME B FRONT PANEL with SPEAKERS may now be removed 10 This picture shows PRINTED BOARD X5 502 removed from the case Any adjustments and...

Page 10: ...V TAPE TRANSPORT MECHANISM JV REMOTE CONTROL SW 3 CONTAINED IN AC PLUG SW 4 AC SWITCH to AMP SW 7 CONTAINED IN VOLUME CONTROL SW 8 MICRO SWITCH Fig 1 Fig 2 ...

Page 11: ...ages the Inner Wheel of Take up Reel Spindle which is then pressed downward Fig 3 to contact Pulley J The Take up Reel Spindle rotates counterclockwise to take up tape During other operation the Pin on Lever F sets SW 6 to the open condition as shown in Fig 3 and pushes SW 8 a rnicroswitch As this time when switch SW 7 which is linked with Volume Control is set to ON current flows to the amplifier...

Page 12: ...perates when Power Line are utilized SW 5 is actuated by Lever G being in the ON condition during START FAST FORWARD and REWIND MODE SW 5 contrais the current of the motor circuit and when SW 5 is ON the motor rotates Adjust motor rotation L during START MODE to 3 000 r p m with potentio meter VR 1 SW 7 which is linked with the volume control controls power source of the amplifier A micro switch S...

Page 13: ...tor Refer to the side view illustra tion of Fig 5 for explanation of lever operations located near by Reel Spindle When Lever E maves in the direction of the arrow Bar Spring K pushes Pin L and the Pulley Shaft and Shaft Bolder move toward Take up Reel Shaft Pulley J firrnly contacts the rubber wheel of the Take up Shaft and Torque of the Pulley is transfered to the Take up Reel Shaft perrnitting ...

Page 14: ...peed loosen the lock pin nuts and by moving the lock pin to the left and right lock the switch lever the lock pin is movable over a distance of 0 8 mm Fig 2 ADJUSTMENT OF THE SWP LEVER As shown in Fig 1 A h 3 3 4 f d ct rews of the t t e positiOn o spee a JUSt t h the sWl c lever S2 and swltch lever to ser lever and the chassis by a distance 1 to 0 2 mm 3 ADJUSTMENT OF THE s P WHEEL ASSEMB LY Fig ...

Page 15: ... ADJUSTMENT OF THE TENSION OF SUPPLY AND TAKE UP REEL SHAFT IN THE PLAYBACK AND RECORD CONDITIONS Fig 4 Supply Reel Shaft 1 e 2 3 5 7 8 0 9 8 10 1 Take up Reel Shaft G 11 12 13 0 14 15 e 0 8 29 8 16 17 18 Fig 4 a Supply Reel Shaft The tension of the supply reel shaft is 10 g standard as measured by a stick gauge provided that the tape is wound around a 3 reel in the playback condition to a thickne...

Page 16: ...assis to the top portion of the reel table plate is 32 3 mm in the rewinding condition b Adjustment of height of take up reel shaft Remove the take up reel shaft and adjust the truck ness of the height adjustment nylon washer so that the height from the surface of the mechanism chassis to the top portion of the reel table plate is 32 3 mm Correct vertical looseness of the reel shaft by tilting the...

Page 17: ... Automatic Recording Switch to Manual position b Connect the V T V M to point A c Push the Record Button until it locks and set the Tape Speed Selector to 7 1 2 d Feed a 1 000 Hz sine wave signal with 1 5 mV output level from an Audio Frequency Oscillator to the Microphone Input of the X V e Turn the Volume Control VR la lOK A until the output level at point A reaches 0 9 V f Turn the Volume VR 20...

Page 18: ... of D C Collector Current for Power Transistors 2SB 370 with no input signal 1 5k 100 a Disconnect the wire between points A and B by using a soldering iron b Connect the D C AmpMeter use one with Milli Amp Scale to points A and B 5 6k 2SC828 Fig 3 Caution 1 When A G C Switch is set to Automatic Recording position the adjustment should be done after 30 seconds while C226 470 JJ F completes the cha...

Page 19: ...ter use one with Milli Amp Scale to between points a and b c Connect the D C Volt Meter to points c and d d Turn the Volume VR 501 5 ohms to the middle position e Turn the Volume VR 502 so that the charging circuit closes 5 7 mA indicated on the AmpMeter as soon as the VoltMeter shows 7 5V 2 8758 X2 VR501 5 n c 6 3V l Fig 5 Fig 6 7mA Fig 7 ...

Page 20: ... TR7 a Connect the Frequency Counter to the Speaker Output Jack b Playback the test tape 1 000 Hz 0 VU recorded at 7 1 2 tape speed and adjust the tape speed by turning the Volume VR 1 SK ohm until the Frequency Counter indicates 1 000 Hz Fig B ...

Page 21: ...em each machine has its own optimum Bias Voltage The optimum Bias Voltage is indicated by a mark stamped on the right edge of the head assembly Bias Voltage should be measured with a V T V M When the head assembly is replaced adjustment of Bias Voltage to the same previous value will ensure a optimum recording condition When replacing the Recording Playback Head adjust the space between the Bias a...

Page 22: ...evel varies with volume control Turning the volume control produces noise Noise Level is irrelative to volume control Defective transistor Tr 201 or Tr 202 Resistor R202 R205 develops noise Replace resistor Replace VR 1 loKnA Check Tr 203 Tr 204 of pre amplifier B Recording System Problems Recording Mode 1 Recording not possible vu meter needle fails to move rc Recording lever not operate the Disa...

Page 23: ...rge Battery Battery indicator indicates in ___ __ 5 step wheel drive belt streched green area L Replace belt Motor speed controller out of adjustment Readjust motor speed 3 Fast Forward and Rewind not possible Motor rotates t Round type dirve belt stretches and slips Replace Drive Belt Check mechanism and spring Pulley slips at Take up or Supply Spindle tension Brake shoe is contacting reel spindl...

Page 24: ...ANISM FRAME REAR BLOCK 28 FRONT SIDE PANEL BLOCK 30 CASE BLOCK X5 3300 32 EQUALIZATION BLOCK ASSEMBLY X5 503 33 PRE AMPLIFIER BLOCK ASSEMBLY X5 502 34 MAIN AMPLIFIER BLOCK ASSEMBLY X5 504 36 ATTENUATOR BLOCK ASSEMBLY X5 501 37 OSCILLATOR CHARGER BLOCK X5 505 38 MOTOR PRINTED CIRCUIT ASSEMBLY X5 2000 40 Note mark shows more than 10 pieces ...

Page 25: ...HEAD BLOCK X5 1100 24 42 43 r 44 35 ...

Page 26: ...m 2 20 X5 1149 Bias Head 1 21 X5 1148 Angle with Shaft Bias Head mounting 22 X5 1151 Side Plate for Bias Head 23 X5 1150 Set Screw 2 x 3 mm 4 24 X5 1172 Set Screw 2 x 5 mm special 2 25 X5 1111 Set Screw 2 3 x 5 mm 1 26 X5 1160 Set Screw 3 x 5 mm 27 X5 1159 Gear Rotary Switch 28 X5 1157 Switch Table 29 X5 1110 Guide Prop Heads hold down 30 X5 1111 Set Screw 2 3 x 5 mm 2 31 X5 1143 Shaft Heads hold ...

Page 27: ...REEL ASSEMBLY BLOCK X5 1200 X5 1300 e l 2 r 3 8 4 6 7 1 g ê 10 1 11 12 13 3 14 5 15 1 _29 16 17 23 63 35 Q 36 37 1 44 43 t 40 42 u41 39 ...

Page 28: ...Mission Spring with Felt Ring right 19 X5 1312 Disk with Rubber 20 X5 1321 Thrust Metal 21 X5 1320 Set Screw 2 3 x 3 mm 22 X5 1319 Stopper Thrust Leber 23 X5 1318 Thrust Lever 24 X5 1325 Spring Thrust Lever Tension 25 X5 1315 Ring Spring 26 X5 1314 Miniature Bearing B 3 7 27 X5 1313 Beadng Plate only without Miniature Bearing 28 X5 1316 Bracket Thrust Lever 1 29 X5 1317 Screw binding head 2 3 x 4 ...

Page 29: ...MECHANISM FRAME FRONT BLOCK 5 1 ...

Page 30: ...ad 2 3 x 3 mm Screw flat head 2 3 mm special 3 step Lever B E Ring 1 9 mm Replacing Lever large Brake Lever B C Spring Brake Lever Screw binding head 2 3 x 4 mm Lug Plate 2 3 mm Screw flat head 2 3 mm special Washer 3 4 mm Screw binding head 2 3 x 3 mm Lug Plate 2 3 mm Lever A right Screw binding head 2 3 x 3 mm Plate Spring R Screw binding head 2 3 x 3 mm Screw flat head 2 3 mm special 3 Step Lev...

Page 31: ...MECHANISM FRAME REAR BLOCK 1 ...

Page 32: ...1803 Holder A 5 step Wheel 83 X5 2298 Screw binding head 3 x 5 mm 2 22 X5 181 0 Screw flat head 2 3 x 5 mm 84 X5 2293 Spring Recording Lever 23 X5 1713 Screw binding head 3 x 5 mm 2 85 X5 2287 Recording Lever C 24 X5 1811 Screw pan head 2 3 x 5 mm 2 86 X5 2289 Screw binding head 3 x 8 mm 2 25 X5 1718 Spring 3 step Lever 87 X5 2286 Angle Recording Lever 26 X5 1801 5 step Wheel 88 X5 2288 U Ring 2 8...

Page 33: ... i1 c 0 2 1 Rel 40 11 1 1 1 1 41 0 1illl 0 m C 2 m ï ttJ ï 0 z ...

Page 34: ...2704 VU Meter A 81 M 1 2 28 X5 2705 Holder Meter 29 X5 2707 Nut 2 3 mm 2 30 X5 2803 Screw binding head 2 3 x 5 mm 2 31 X5 2800 Equalizer Printed Board Assembly Complete 32 X5 2726 2 pole Mie Jack E J 1 2 2 33 X5 2706 Screw flat head 2 3 x 5 mm 2 34 X5 2720 Slide Switch FS 201NH SW 1 MicjLine 35 X5 2730 Tone Volume Control V162DS SG VR 2a b 2 36 X5 2731 TonefVolume Control with Switch VI62DN Vl la ...

Page 35: ... 3316 Mechanism Panel 15 X5 3360 Nut 2 3 mm 1 5 X5 3322 Screw truss head 3 x 6 mm 2 16 X5 3355 Rubber Foot 2 6 X5 3338 Case Cover B 17 X5 3356 Screw truss head 2 3 x 8 mm 2 7 X5 3341 Screw truss head 2 3 x 6 mm 4 18 X5 3342 Case Cover D 1 8 X5 3330 Upper Frame left 19 X5 3346 E Ring 9 X5 3331 Screw binding head 2 3 x 3 mm 6 20 X5 3345 Set Screw Case Cover D 10 X5 3332 Upper Panel 21 X5 3340 Nut 2 ...

Page 36: ...X5 L301 Inductive Coil FL 7H 302 11 X5 C302 Mylar Condenser vertical mounting type 0 01J L 50 V 12 X5 L301 Inductive Coil FL7H 302 13 X5 C303 Mylar Condenser vertical mounting type 0 056J L 50 V 14 X5 C305 Mylar Condenser vertical mounting type 0 1J L 50 V 15 X5 C304 Mylar Condenser vertical mounting type 0 2J L 50 V 16 X5 C304 Mylar Condenser vertical mounting type 0 2J L 50 V 1 co 0 i i 17 X5 C3...

Page 37: ...0 X5 R233 Carbon Resistor with stopper lOOn 1 4 watt 2 X5 D203 Germanium Diode IN34A ON tl OOOO Y Y Y Y Y j X5 502 Qu ty Ref Parts No No 3 X5 R231 4 X5 C226 2 5 X5 C224 Nomenclature Qu ty Carbon Resistor with stopper 680rl 1 4 watt 2 Electrolytic Condenser vertical mounting type 470 L 6 3 V 2 Electrolytic Condenser vertical mounting type 1000 L 10 V 2 ...

Page 38: ...ith stopper 18K 1 4 watt Carbon Resistor with stopper 18K 1 4 watt Carbon Resistor 1K 1 4 watt Carbon Resistor with stopper 12K 1 4 watt Qu ty 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Ref No Parts No 45 X5 R209 46 X5 C205 47 X5 C209 48 X5 R237 49 X5 C210 50 X5 C213 51 X5 R214 52 X5 R205 53 X5 D202 54 X5 C207 55 X5 C208 56 X5 C212 57 X5 TR202 58 X5 D201 59 X5 R206 6...

Page 39: ... 2 tJ ï T1 m 0 to ï 0 en en m ttJ ï x 0 1 Ù1 0 e ...

Page 40: ...tt 2 1n 1 4 watt 2 3 X5 R104 3 9K 1 4 watt 2 11 X5 R406 Carbon Resistor with stopper 100n 1 4 watt 2 4 X5 R105 82K 1 4 watt 2 5 X5 R103 470n 1 4 watt 2 12 X5 TR402 Transistor 2SB370 B 2 13 X5 R405 Carbon Resistor with stopper 1 5K 1 4 watt 2 14 X5 C404 Electrolytic Condenser vertical mo unting type 33 u 10 V 2 15 X5 R402 Carbon Resistor with stopper 8 2K 1 4 watt 2 16 X5 C401 Electrolytic Condense...

Page 41: ...OSCILLATOR CHARGER BLOCK X5 505 ...

Page 42: ... type 33M 25 V Wirewound Resistor sn 1 watt Carbon Resistor with stopper 470n 1 4 watt Zener Diode IN7 55 Transistor 2SB370 B Heat Sink Plate C Rectifier 16C 4 D 1 Plastic Condenser tublar type 1200P 500 V Transistor 2SB324 Carbon Resistor with stopper 3 3K 1 4 watt Oscillator Coil Mylar Condenser vertical mounting type 0 015M 50 V 24 X5 RSOS Carbon Resistor with stopper 3 3K 1 4 watt 25 X5 HOSC1 ...

Page 43: ...6 7 8 9 10 11 12 13 14 15 16 17 18 19 2 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 s 0 i 0 0 U 0 z i m 0 0 c i l C C m s OJ r Cil N 0 0 9 ...

Page 44: ...h stopper lOOK 1 4 watt 17 X5 C05 Tantalum Electrolytic Capacitor vertical mounting type lOJ L 10 V 18 X5 TR02 Transistor 2SB 346 19 X5 R011 Carbon Resistor with stopper 1 5K 1 4 watt 20 X5 D01 Germanium Diode IN34A 21 X5 C03 Tantalum Electrolytic C pacitor vertical mounting type 1 fL 10 V 22 X5 R010 Carbon Resistor with stcpper 4 7K 1 4 watt 23 X5 R09 Carbon Resistor with stopper lOOK 1 4 watt 24...

Page 45: ...MEMO ...

Page 46: ...SW201 1 12 REC P B CHANGE SWITCH CCLBI12ê835 5HOWING RECORD OPERATION SW3D1 EQUALIZATION SELECTOR CONTROLED BY SPEED SELECTOR SW TCH CF i A 4 2 5HOWIN 7 lz IPS Ot ERATION SW401 MUTE SWITCH FS 201 NH CSHOWIN NORMAL OPERATION SW 1 INPUT SELECTOR SW CMIC LINEl CFS 20 NH CSHOWING MIC INPUT OPI RATION l SW 2 A G C ON OFF SW CSL 24 284 F SHOWit 1 A C r C ON CONDITION SW 3 AC DC CHANG E SW CBELONCrS TO J...

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