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Salora SV8720, Service Manual


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Summary of Contents for SV8720

Page 1: ...tandard Play 11 7 mm sec Long Play 240 min with E 240 cassette Standard Play Mode 480 min with E 240 cassette Long Play Mode 4rotary single crystal heads 1 stationary head 1 full track head Video Inpu...

Page 2: ...udio Circuit Adjustments ee 14 ne 4 Mechanical Adjustments 0 05 15 4 1 Tension Pole Position Adjustments 15 4 2 Installation of Master Plane Jig 0 15 4 3 Supply Impedance Roller and Take up Guide Pole...

Page 3: ...n slide toward rear in the direction of the arrows 2 REMOVAL OF FRONT PANEL A B Remove screw at Unfasten the seven snaps and and remove the front panel in the direction shown by the arrows 3 REMOVAL O...

Page 4: ...rear side of the signal circuit board which is shown in Fig 5 B Open the circuit board in the arrow marked direction letting the right side hook hang on the base chassis 2 PCB CONTROL POWER A Remove...

Page 5: ...e PCB Ope Supporter 4 PCB TIMER A Unlock the two PCB Timer Supporters and as shown in Fig 8 B Remove the PCB Timer 5 PCB Power SUB A Remove the three screws and retaining the PCB power sub as shown in...

Page 6: ...the transport system require occasional cleaning S SLANT POLE S GUIDE ROLLER FE HEAD S IMPEDANCE ROLLER A D Gj TENSION POLE fe ZZ sP GuDE fq OLE q 4 UPPER LOWER DRUM TENSION POLE FE HEAD SP GUIDE POL...

Page 7: ...xagonal socket head screws which fasten the guide rollers of the supply and take up Standard signals VHS Standard are recorded on the alignment tape and reproduced when required in the adjustment of Y...

Page 8: ...is applied to the part being measured y Grip ring fixer 859C34705 A tool for preventing the grip ring from opening excessively While opening the grip ring with the tips of this tool install the grip r...

Page 9: ...Replacement of Cassette Housing 2 1 1 Removal A Remove the Top Cover and Front Panel B Place the PCB signal vertically in the service position C Remove the screw retaining the Stay Stop per C as shown...

Page 10: ...D J If an irregularity is detected in steps H and I the cassette housing may be incorrectly assem bled Loosen the fastening screws unfasten the cassette housing and readjust as required moo Loading p...

Page 11: ...the two upper drum mounting screws Fastening them one after the other Solder the terminals and as shown in Fig 2 3 A Fasten the brush with the brush retaining screw as shown in Fig 2 3 A 2 4 Replacem...

Page 12: ...k the three supports and shown in Fig 2 6 A and remove the Holder Worm Unlock the two Motor Supports and as shown in Fig 2 6 A and remove the Loading motor Holder retaining screw Cassette housing Load...

Page 13: ...ture of the defect and repair prior to proceeding with adjustments PCB CONTROL Parts side COA 3WO5AD XOSC ADJ tes TP2 IC6A0 WR2A5 om Ye iree i Z a w AUD TP2J eoTP2R a Sagem We enero 1__CARRIER LEAK AD...

Page 14: ...2 Tracking Preset Adjustment Turn the tracking control VR480 to the centre click stop position Playback the selfrecorded tape LP mode Connect CH1 of the oscilloscope to TP4A and CH2 to TP4B on PCB CO...

Page 15: ...nimum ampli tude at the point shown in Fig 3 7 to TP 6J DIV 20mvV X10 TIM 10sec 3 2 6 FM Record Level Adjustment A Supply an RF signal colour bar to the recorder and set it to the LP RECORD mode B Con...

Page 16: ...in and Pin of the Scart socket Refer to Fig 3 11 and set the recorder to RECORD mode Connect an AC voltmeter with a probe high pass filter to TP 3E and TP 3F as shown in Fig 3 12 Note Be careful that...

Page 17: ...condition i e when the VCR is loaded with either a cassette tape or dummy cassette After loading has been completed remove the power cord from the AC source Remove the cassette housing Ensure that th...

Page 18: ...djust square 16 4 5 Arm Take up Guide Pole Adjustment A B Install the master plane jig as described in 4 2 Place the Height Adjust Square on the master plane and be sure that the lower flange of the a...

Page 19: ...repairing the mode switch ensure that the VCR is turned off in the STOP mode Prior to adjustment it should be confirmed that the cassette housing is in the status of cassette in STOP mode A Align both...

Page 20: ...position of the half loading pole after interchangeability and A C head adjustment is made A Disconnect the power supply plug with the B C and D in the half loading gear to the position shown in Fig...

Page 21: ...nce and exit either the guide roller or the guide poles on the points in the playback mode supply and take up side in loading playback and unloading Upper Drum Unsatisfactory Sais factory Guide a roll...

Page 22: ...e guide roller with the hex key If loosened excessively the guide roller may be moved by the run of the tape In this case tighten the set screw slightly B Load the recorded tape and set the recorder t...

Page 23: ...pe run B When any tape folding or tape shrinkage is incurred on the top side of guide roller rotate the slant pole assembly to widen the slant pole angle Direction A C When the tape folding or tape sh...

Page 24: ...ent 22 4 11 3 Drum Exit Point Adjustment A The waveform at the exit point shall be adjusted in the same procedure as given for the drum Meeting Point Loosen slightly the set screw on take up guide rol...

Page 25: ...um point of fluctuation Rotate the tracking contro knob from maximum to minimum FM waveform output and vice versa and finely adjust the height of the supply and take up guide rollers 23 CAM SCREW __ A...

Page 26: ...ment of the azimuth Adjust to 6KHz maximum audio output Be sure that audio level fluctuation is below 2dB peak to peak 24 F If the audio level fluctuation is greater than 2dBp p Recheck the alignment...

Page 27: ...Forward Frequency generator Front Loading SW Front Loading Motor FF Rewind Switch Ground Hall Element 1 Hall Element 2 Humidity LED Humidity Sensor High Pass Filter 25 uM LPF LM MDA McC MIC MOD OPE Os...

Page 28: ...UNIT FRONT OOOR TIMER CATCHER BUTTON STOP BUTTON PLAY DOOR FL COVER ANT COVER POWER NOTE Broken AC power cord must be exchanged with a new original power cord 26 G00669D212010 G00242C879010 G00968C013...

Page 29: ...2 DECK ASSEMBLY 1 27...

Page 30: ...e 3 1x 65 4xt0 5 3 10 13 F 6 M2 66 M 6 M2 6x 10 M2 6x6 M4x0 7 qag71 370 M2 6x0 45 16 M2 6x8 M3x0 5 8 M570 Settled Service Parts G00669D285010 G00591B269010 G00621D153010 G00522C055030 G00641B167010 G0...

Page 31: ...ay O Lu a a Lu 7p op...

Page 32: ...G00669D200020 G006690227090 G00669D227010 G00669D287020 G00439P011040 G00948A027020 G00521D053010 ADDRESS SCREW SEMS SCREW TS INSULATOR CP MOTOR CP ASSY PWB REEL SENS STOPPER RD ARM LOAD S ARM LOAD T...

Page 33: ...06210221010 G00215C219010 G00572D178010 G00439C021010 G00268P040020 2 One O COG Gots 0 2 J 6 E 5 H 5 G 6 G 3 G 3 C 7 E 3 0 4 1 5 E 3 E 4 E 4 1 6 5 1 6 H 5 H 6 E 6 A 4 H 8 A 3 A2 B 2 B 2 J 8 K 8 K 9 K...

Page 34: ...E eee ee oor eeeeeee D6A4 G00264P370010 DIODE 1N4148 Q2D1 G00260P603010 DIGITAL DTA124ES UN4112 D6AS G00264P370010 DIODE 1N4148 TRANSISTOR G00264P370010 0202 G00260P543010 TRANSISTOR yesorp Q sds wee...

Page 35: ...4212 G00260P338050 TRANSISTOR 2SC2603 G TRANSISTOR G00260P543020 TRANSISTOR JC501 O R Q4A8 G00260P543010 TRANSISTOR JC501 7 Q G00260P543020 TRANSISTOR JC501 Q R Q4B80 G00260P338030 TRANSISTOR 2SC2603...

Page 36: ...TRANSISTOR DIGITAL TRANSISTOR DIODE ZENER DIODE ZENER DIODE uPC574J K L JC501 P 0 2SD1776 P Q 2SC3852 2SB892 S T U JA101 P 0 JC501 P 0 JC501 P Q 2SC3852 OTA124ES UN4112 1N4148 HZ30 2 30V ZENER HZ12A3...

Page 37: ...WN PRS NS Sa laa G00928C305060 G00432P100020 KEY BOARD SWITCH CH DWN G00432P100020 KEY BOARD SWITCH TIMER RESET G00253P059020 FLUORESCENT 13 BT 74Z DISPLAY CRYSTAL 4 194304MHz RESONATOR CRYSTAL RESONA...

Page 38: ...DissCRIPTION ACCESSORY G00803A087010 G00831D190030 G00802819201 CUSHION VTR PACKING SHEET ACCESSORY PACKING CASE 35 G00242D231030 G00829C054070 G00831D181020 G00871C811050 G00939P203040 CABLE SHEET S...

Page 39: ...Sw57 R INHIBIT PCB REEL SENSE Gi op MOTOR v 2 PCB CONTROL CAPSTAN MOTOR O gs O O O...

Page 40: ...aygad ys qq ye ee 1 ian MECHANISM CONTROL PCB CONTROL SERVO POWER eee ee ee es Ce SS ee OOOO 90 2 erie Tay onom MOTOR VIDEO HEAD 8 PL SPR 7 b 6 secon d PCB SIGNAL a os PCB SIGNAL Y C ag W 2 e 0 AUDIO...

Page 41: ...Z8AO GPIUSO3 PREAMP REMOTE CONTROL TRANSMITTER REMOTE CONTROL...

Page 42: ...numbers less than 1 b PF for numbers more than 1 7 Capacitors not specifically designated are Ceramic capacitors esd except electrolytic capacitors 8 The marks of capacitors are as fotiows Aluminus el...

Page 43: ...oe eres aoe so Ss es ee eee ees Serres Sa NES OS Se Se eS Sa SRST Ss QaGQQQiS S _ _ _ _ _ _ _ _ aes aaa Eee aa 3 x 9 pPOTS208G6 522 1B ICBAO VBAO 3 BT 74Z 11 1 ea Selon peered cS ee et CR i Dae aes e...

Page 44: ...PCB TIMER A Diode not specifically designated is IS2076 IN4148 603 SLOW FADV 4 ll l a foe...

Page 45: ...E COMPONENTS HAVING SPECIAL CHARACTERISTICS IMPORTANT TO SAFETY AND PER FORMANCE THEREFOR REPLACEMENT OF ANY SAFE TY PARTS SHOULD BE DENTICAL IN VALUE AND CHAR ACTERISTICS OON T DEGRADE THE SAFETY OF...

Page 46: ...e ft r t f staes EI 3y a CI Someries Beer es I sy omre t 0 6 ie ace al HH t He ws LLL peereaeeoencrpncg cosmo enero caecaine gee CPANEL CMGI GIE LIM GI Ge BO 2 Waite S36 2 FF YT wg Go oo 2 E F 3 eo yo...

Page 47: ...a SE VIEIMIGINIENOERE RECEADEED RPESZING Gael ES MCR a Psa ISB p_ ho C542 Ses CAO THAN dE eesh ae en ee es a G2 SOX ae UNG2I2 i Sore ereroretaetoy HES os 25c26g38 0 2s i Seaih o Sage eee a See oe en...

Page 48: ...1 9 Flt baa 61 upraat os tp20 Ha D2A3 G1 LPF6AO G5 tpaR Ha aor o3 o2aa ons TP2s wa Toeas wa Trav Ge bens fee VSro1 02 tex HT D6A5 G 5 TP2Y H 7 D6A7 1 4 aa TP3A D 1 T101 TP3D I T3A0 TP3E E 2 VR101 C1...

Page 49: ...PCB SIGNAL 2 3 4 5 6 7 8 9 240A45301 8 ast A v e OA al 19 188 aE 2 g a Jaa J3A1 J3A0 J2ne...

Page 50: ...6 y Q4ai E 8 TPGND F 6 tt 4t _ Q4a2 7 L O4A3 F7 D4AO D8 oaaa c7 paar 07 ih Q4A5 D6 D4A3 E6 posses oa Q4a7 D7 D4ad D4 o4as pe psao c7 ars 4 Q4B0 c DsAI ca J 0481 c5 05a2 B89 fi Q4B2 E 5 D5A3 C 8 4 a an...

Page 51: ...26038 8 a eS om 25 27850 B _ Jcso01 tevin V OUT CONVIN BURY 0s ara QISt devs 2SC2603G or PSK VIDEO MUTE 2SAIN ISO 2SAl 759 00 4 JAIOIP O BAND SW A OUT CONV IN Qi OTCI2Z4ES TU A IN rr L ALDI 303 a ee i...

Page 52: ...V 12 V ce BAVC Ke I Of Q202 2SC2603 2SC2785 ucsol ae aaF OF cf t wer o oo p 2 i sale Be O O O40 O G O NO a a B eats i yes eRe AEM ett oY oe eee oe eee i 4 20 far aeons 22 c2Fz oz Jez a ca fin saong Fe...

Page 53: ...ONV IN BS e Tu v TUI2V ee Tut2v 5 v OUT rete 820 30 W7v C3782 16V Or57 a2s ez 22 maces A OUT CONV IN MUTE 2 i a268a Se 2a ate 31a Were ae 28 26038 8 ce Bem GS Son LY G Tua scree a a eee oe Qi 9 oe re...

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