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Sony SVT-RA168, Service Manual

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Sony SVT-RA168 Service Manual Download Page 18

2-2

SVT-RA40/RA168

1-1-1. Regular Checks

 Cleaning

 Check

 Oil

 Check, Replace

Part maintained

Part Number

Hours of use (H)

Remarks

2000

4000

6000

8000

Band brake assembly

3-963-789-01

BT lever assembly

3-961-016-01

Full erase head

3-193-669-01

Cleaner roller assembly

3-977-067-01

Guide roller assembly

3-735-630-01

S incline mounting assembly

3-961-037-01

Tape path

T incline mounting assembly

3-961-039-01

system

ACE head

A-8344-338-A

Pinch roller lever assembly

3-961-024-01

Pinch lift mounting

3-204-110-01

Pinch lift cam

3-961-027-01

Pinch cam gear

3-203-303-01

Cylinder chip earth

3-206-679-01

Cylinder complete

A-8344-339-A

( )

( )

Upper cylinder assembly

3-206-564-01

( )

( )

( )

( )

Supply reel assembly

3-977-065-01

 

 

 

 

Take up reel assembly

3-963-782-01

 

 

 

 

S reel gear

3-960-927-01

T reel gear

3-960-928-01

Reel drive

Reel pulley

3-960-926-01

system

Special washer 2.4 

x

 6 

x

 0.25

3-948-603-01

Clutch mounting complete

A-8316-756-A

Reel belt

3-960-929-01

Capstan motor

3-203-331-01

( )

( )

Friction gear assembly

3-206-566-01

 

 

S brake assembly

A-8325-366-A

Brake

T brake assembly

A-8325-367-A

system

Capstan brake assembly

A-8315-818-A

T soft brake assembly

3-963-784-01

Loading motor assembly

3-961-047-01

Damper

3-961-049-01

Worm gear complete

3-961-048-02

Main cam

3-206-567-01

Special washer 3.6 

x

 0.5

3-973-491-01

Loading

Wheel gear 1

3-961-050-01

drive

Wheel gear 2

3-963-793-01

system

Opt pinch relay gear

3-206-568-01

Crescent slide

3-203-305-01

S load gear

3-960-995-01

Front rack gear

3-961-305-01

Start rack gear

3-961-306-01

Pinion gear

3-960-960-01

Perform-

Back tension torque

PB back tension torque: 25~50 g

.

cm

ance

FF, REW torque

FF, REW: more than 600 g

.

cm

checks

PLAY torque

PLAY: 55~110 g

.

cm

REV torque

REVIEW: 100~210 g

.

cm

This periodic maintenance check table changes considerably according to the using conditions and environment.
This is an annual periodic maintenance check table. Repeat this maintenance table every year.
As life may be shortened if foreign particles and dusts remain accumulated on the tape guides and rotating and contacting portions, clean if dirty.
Dusts and other foreign particles on the tape guides may also shorten the tape life and lower picture quality, therefore clean thoroughly.

Summary of Contents for SVT-RA168

Page 1: ...TIME LAPSE VIDEOCASSETTE RECORDER SVT RA40 SVT RA168 SERVICE MANUAL 1st Edition COMPUTER INTRFACE BOARD SVT RS100 ...

Page 2: ... werden Um die Gefahr eines elektrischen Schlages Feuergefahr und Verletzungen zu vermeiden sind bei Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen Andere als die angegeben Wartungsarbeiten dürfen nur von Personen ausgeführt werden die eine spezielle Befähigung dazu besitzen AVERTISSEMENT Ce manual est destiné uniquement aux personnes compétentes en charge de l entretien Afin de ...

Page 3: ... le constructeur Mettre au rebut les batteries usagées conformément aux instructions du fabricant ADVARSEL Lithiumbatteri Eksplosionsfare ved fejlagtig håndtering Udskiftning må kun ske med batteri af samme fabrikat og type Levér det brugte batteri tilbage til leverandøren ADVARSEL Lithiumbatteri Eksplosjonsfare Ved utskifting benyttes kun batteri som anbefalt av apparatfabrikanten Brukt batteri r...

Page 4: ......

Page 5: ...ism 2 1 1 1 Regular Checks and Maintenance Items 2 1 1 1 1 Regular Checks 2 2 1 2 Service Tools and Cleaning 2 3 1 2 1 Service Tools 2 3 1 2 2 Cleaning 2 4 2 An Overview of the Mechanism 2 5 2 1 Names of the Main Parts 2 5 2 1 1 Cassette Mechanism Assembly 2 5 2 1 2 Topview 2 6 2 1 3 Underside 2 7 2 2 An Overview of the Mechanism Modes 2 8 2 2 1 Mechanism Mode Switching Table 2 8 2 2 2 Movement Ch...

Page 6: ...Assembly and Stopper Lever Assembly 2 22 3 11 BT Lever Assembly 2 22 3 12 Reel Drive Mechanism 2 23 3 12 1 Reel Belt Reel Pulley Friction Gear Assembly and Clutch Change Lever 2 23 3 12 2 Clutch Mounting Assembly 2 23 3 12 3 S Soft Lever Supply Reel Assembly and S Reel Gear 2 24 3 12 4 T Soft Brake Assembly Take Up Reel Assembly T Reel Gear 2 24 3 13 Brakes 2 25 3 13 1 S Brake Assembly T Brake Ass...

Page 7: ...Height Adjustment Azimuth Adjustment and Horizontal Position Adjustment 2 37 4 3 5 Checking After Adjustment 2 38 5 Test Points for Tape Path Adjustment 2 38 3 Electrical Adjustments 3 1 Servo Circuit Adjustment 3 1 3 1 1 Test Equipment and Standards Required 3 1 3 1 2 Location Of Adjustment Points 3 1 3 1 3 Switching Position Adj 3 2 3 1 4 24 H Play Tracking Confirm and Adj 3 2 3 1 5 F Slow Track...

Page 8: ...1 IC002 Interface MPU Pin Function Table 7 1 CP 1 Board VA A 7 2 Video Circuit Waveforms 7 4 IC301 System Control Timer OSC Servo MPU Pin Function Table 7 4 CP 1 Board SY A 7 5 Servo Circuit Waveforms 7 6 Display FLD Grid Anode Assignment Drawing Table 7 6 TM 1 TM 2 Board 7 7 PW 1 Board 7 8 8 Board Layouts CP 1 Board 8 1 TM 1 Board 8 2 TM 2 Board 8 2 CT 1 Board Option Board for SVT RS100 8 2 PW 1 ...

Page 9: ...enance and detailed service parts replacement guideline for adjustment schematic diagrams board layouts detailed parts list Related manuals In addition to this Service Manual the following manuals are provided Operating Instructions SVT RA40 Supplied with Model SVT RA40 Part number 3 206 678 XX SVT RA168 Supplied with Model SVT RA168 Part number 3 206 574 XX SVT RS100 Supplied with Model SVT RS100...

Page 10: ...ools disassembling the main parts of the mechanism and tape path adjustment Section 3 Electrical Adjustments Describes the electrical alignment for the maintenance of this unit Section 4 Spare Parts Describes the exploded views the mechanical parts list and the electrical parts list Section 5 Semiconductors Describes information on semiconductors used for unit Section 6 Block Diagrams Describes th...

Page 11: ...f the power supply being ALARM DATA Number of ALARM REC Total counts of ALARM n The data for the maintenance tables are memoried in E2 PROM and the memory can be kept if the timer micro computer is reset Maintenance table 2 As shown in Fig below Maintenance Table 2 ERROR is displayed on the screen When the MENU RESET button is pressed during display and resetting all data ERROR Dates and error cod...

Page 12: ...with the cassette inserted E12 The supply reel does the tape eject when tape unloading E13 The tape cannot be loaded with the cassette inserted E14 The tape cannot be loaded normally E15 The mechanism does not move to the correct position after tape loading E16 Mechanism position 3 cannot be used during intermittent recording Mechanism Mode Display Contents Mode No Mechanism mode Mode No Mechanism...

Page 13: ...moving the locks of the clamps A using a screwdriver etc and slightly rotating the bottom part in the direction of the arrow m Electrical adjustments for the this model can be performed with only the cabinet removed When replacing the bottom cover do not tighten the screws 2 too much Excess tightness may damage the screws taps on the chassis Fig 1 1 1 2 2 2 2 2 Front Panel Clamps A Cabinet Main Un...

Page 14: ...ing the tray lock lever in the arrow direction to remove the lock as shown in the enlarge view A and by pushing the lid opener lever in the arrow direction to remove the lock as shown in the enlarge view B 6 Lift up the whole mechanism unit and main board CP 1 PWB assembly and as shown in Fig 1 1 3 push the two lock clamps D of the chassis in the arrow direction so that they can be removed from th...

Page 15: ...emporarily Setting Up and Connecting CP 1 PWB Assembly The following is an example of how to place and connect the main board without a jig when repairing the CP 1 PWB assembly 1 Place the mechanism unit and main board up side down as a whole on a flat surface with foil side of the main board facing up 2 Operete the unit using the buttons on TM 1 PWB and TM 2 PWB Fig 1 1 4 PW 1 PWB Screws CP 1 PWB...

Page 16: ...Z3901 CP 1 board Part description MnO2 Li lithium battery Part No 1 756 091 11 Replacement 1 Remove the cabinet and bottom cover Refer to Section 1 2 1 Removing the Cabinet Parts 2 Place the mechanism unit and CP 1 board up side down as a whole on a flat surface with foil side of the CP 1 board facing up Refer to Section 1 3 Tempo rarily Setting Up and Connecting CP 1 PWB Assem bly 3 Unsolder the ...

Page 17: ...n the following section should also be carried out without fail after carrying out any repairs to the set Note Oil and Grease Always use the specified brands of oil and grease If you use a grease with the wrong viscosity for example this can lead to all sorts of problems Be careful to keep the oil and grease free of dust and foreign bodies A drop of oil is the amount of oil remaining on the tip of...

Page 18: ...S brake assembly A 8325 366 A Brake T brake assembly A 8325 367 A system Capstan brake assembly A 8315 818 A T soft brake assembly 3 963 784 01 Loading motor assembly 3 961 047 01 Damper 3 961 049 01 Worm gear complete 3 961 048 02 Main cam 3 206 567 01 Special washer 3 6 x 0 5 3 973 491 01 Loading Wheel gear 1 3 961 050 01 drive Wheel gear 2 3 963 793 01 system Opt pinch relay gear 3 206 568 01 C...

Page 19: ... load assembly 7 Torque dial gauge VHJ 0004 Used to measure reel winding torque 8 Cassette torque meter VHJ 0016 Used to measure back tension torque 9 Load lever assembly height J 6431 410 A Used to adjust the height of the load adjustment tool VHJ 0111 lever assembly 10 Torque gauge screwdriver VHJ 0014 J 6082 047 A Used to adjust the tightening torque of screws 11 3 mm dia bit for torque screwdr...

Page 20: ... wipe vertically or use excessive force you can damage the video head 2 Tape Path System Reel Drive System Clean the pinch roller the capstan shaft the tape guides the FE head the ACE head the reel table the pulley and the reel belt with a soft cloth or chamois moistened with methyl alcohol n If the dirt on the tape guide cannot be cleaned off replace the tape guide Fig 1 2 2 Tape path surface Vid...

Page 21: ...chanism 2 1 Names of the Main Parts 2 1 1 Cassette Mechanism Assembly Fig 2 1 1 Fig 2 1 1 Washer Special washer Stand L Tray lock spring Lid opener spring Release lever Pinion gear Gear holder Lock gear Drive gear Door opener lever Under frame ...

Page 22: ...Take up reel asswembly T soft brake assembly T brake assembly L guide act lever assembly Tape top sensor Load lever assembly Start rack gear Pinch cam gear Opener mounting Front rack gear Pinch lift mounting Pinch lift cam Capstan motor Pinch roller lever assembly Dew sensor Stopper lever assembly Audio R P head assembly ACE head Capstan brake assembly Cleaner lever Rotor Cylinder Drum Cleaner rol...

Page 23: ...ontrol lever Main cam Clutch change lever Crescent slide Wheel gear 2 Wheel gear 1 Brake act lever assembly Reel pulley Friction gear assembly S brake act slide MC 1 PWB assembly BT spring lever assembly S load lever assembly T load lever assembly Crescent mounting S load gear T load gear Loading motor assembly Worm gear assembly ...

Page 24: ...nguished by whether the EP switch is ON or OFF Horizontal shift section Vertical shift section IN REW R INITIAL 7 Cleaner roller assembly ON S T mounting incline assembly pressure begins S T mounting incline assembly pressure ends R STILL R SLOW 2 BRAKE pos 4 POWER OFF STAND BY IDLER POS 2 Pinch roller OFF REVIEW 1 STILL SLOW REC INTERVAL 3 PLAY STOP REC 5 FF REW 6 6 4 0 6 2 0 7 0 1 0 1 0 2 0 2 0 ...

Page 25: ...e 2 2 3 How To Check The Mechanism Mode Position You can tell which mode the mechanism is currently in by looking at the codes and marking lines on the crescent slide on the underside of the mechanism chassis The edge of the crescent mounting is used as the reference line as shown in Fig 2 2 2 and the marking lines and symbols indicating the mechanism modes are displayed on the crescent slide whic...

Page 26: ...d in sections 3 1 1 The above movements can also be performed with ou operating the loading motor by following the metho explained in Section 3 1 2 3 1 1 Operating the Loading Motor by the Manual Method 1 Refer to Section 3 2 and install the mechanism unit 2 Using your finger turn the loading motor located at the rear of the mechanism unit For EJECT turn the loading motor in the direction of the a...

Page 27: ...y on the cylinder drum and unplug the ACE FE head connectors 2 3 Unplug the flat cable from the stator 4 Unplug the dew sensor connector 4 5 Remove the four screws 5 then lift up the mecha nism unit The tray 6 will stop you removing the two screws 5 on the front so release the lock by pressing down the tray lock lever 7 and the lid opener lever 8 shown in Fig 3 2 2 then slide off the tray 6 Move t...

Page 28: ...tening torque of 5 kg cm Fig 3 3 1 3 3 2 Cassette Drive Gear 1 Refer to Section 3 3 1 and remove the cassette mecha nism assembly 2 Remove clamps 1 and 2 then remove the gear holder 3 3 Remove the clamp 1 then remove the pinion gear 4 4 Remove the clamp 2 then remove the lock gear 5 Assembly Notes 1 Put the tray in the EJECT mode position before fitting any parts 2 Apply grease VHJ 0100 to the gea...

Page 29: ...tand L Fig 3 3 4 3 3 4 Start Rack Gear and Front Rack Gear 1 Remove the mechanism unit referring to Section 3 2 2 Remove the cassette mechanism assembly referring to Section 3 3 1 3 Remove the special screw 1 When you do this slide the front rack gear assembly 2 towards the front until it stops then take it off the shaft 3 Take care not to damage the shaft 3 4 Remove the spring 4 5 Remove the clam...

Page 30: ... and take out the cleaner roller assembly 4 Be careful not to touch the sponge on the cleaner roller assembly 4 Assembly Notes 1 When mounting the cleaner lever 2 on the shaft 5 press the clamp 1 in the direction shown by the arrow and snap it into the mounting 6 on the audio R P head assembly Fig 3 4 1 5 Shaft 6 Mounting A Plastic spring 1 Clamp 2 Cleaner lever 3 Clamp B Plastic spring 4 Cleaner ...

Page 31: ...8 adjust the position of the cylinder motor mounting 9 in the direction of the screw In this state hold the cylinder motor mounting 9 with the upper drum fitting tool VHJ 0112 and tighten the screw 8 with the hexagonal wrench 2 When attaching the rotor 7 the phase must be adjusted to that of the upper cylinder assembly 0 As shown in Fig 3 5 3 attach so that the hole a of the upper cylinder assembl...

Page 32: ...der assembly 6 with the two dowels 7 on the cylinder mounting 4 See Fig 3 5 5 2 Apply grease VHJ 0100 to the rails of the cylinder mounting 4 grease the parts which come in contact with the S and T incline mounting assembly See Fig 3 5 5 3 Align the two dowels 8 on the cylinder mounting 4 with the two holes 9 on the mechanism chassis See Fig 3 5 4 4 After assembly clean the tape path surface of th...

Page 33: ...amp 6 on the cleaner roller assembly has snapped into the mounting of the audio R P head assembly ACE head 2 3 After assembly clean the surface of the head with a soft cloth or chamois 4 After assembly refer to Section 4 3 and adjust the head height the azimuth and the tracking X posi tion Fig 3 6 1 3 6 2 Full Erase Head 1 Unplug the connector from the full erase head 1 2 Remove the screw 2 and th...

Page 34: ...ssembly clean the capstan shaft with a soft cloth or chamois Fig 3 7 1 Case 2 Normal FF REW model 1 Refer to Section 3 2 then remove the mechanism unit 2 Remove the screw 1 then remove the capstan mounting 2 3 Remove the reel belt 3 4 Remove the three screws 4 and the capstan motor 5 Assembly Notes 1 Check that connector 6 is inserted in the CP 1 PWB assembly 2 When fitting the three screws 4 use ...

Page 35: ... 3 4 Remove the worm gear assembly 5 To maintain performance do not dis assemble the worm gear assembly 5 Assembly Notes 1 Apply grease VHJ 0010 to the teeth of the worm gear assembly 5 Then apply grease VHJ 0114 to in the hole of the worm gear assembly 5 2 Check that the clamps 3 and 6 are securing the loading motor assembly 3 Check the polarity of the lead wires 2 the orange wire is the positive...

Page 36: ...e the pinch roller lever assembly 4 off the pinch lift mounting 2 Be fore you do this align the Indentation 5 on the pinch roller lever assembly 4 with the clamp 6 on the pinch lift mounting 2 Assembly Note 1 Be careful to keep the surface of the pinch roller free of dust and dirt Fig 3 9 1 2 Pinch lift mounting 3 Spring 4 Pinch roller lever assembly 1 Clamp 6 Clamp 5 Indentation ...

Page 37: ...of the pinch cam gear 6 2 Check that the positioning mark 0 on the OPT pinch relay gear 9 is aligned with the arrow on the MC 1 PWB assembly as shown in Fig 3 9 3 Then align the square mark on the pinch cam gear 6 with the arrow on the MC 1 PWB assembly After that align the round hole on the pinch lift cam 5 with the indentation on the pinch cam gear 6 If you have carried out the above alignments ...

Page 38: ...ly 3 Remove the BT spring 1 and remove the sub BT spring 2 on the underside of mechanism chassis 4 Remove the clamp 3 on the underside of the mecha nism chassis then remove the BT lever assembly 4 5 Remove the clamp 5 on the band brake assembly 6 Then as shown in Fig A align the other end of the band brake assembly with the protruding parts of the BT lever assembly 4 before removing it Assembly No...

Page 39: ...2 Be careful not to get any grease on the reel belt 1 Fig 3 12 1 3 12 2 Clutch Mounting Assembly 1 Refer to Section 3 3 1 and remove the cassette mecha nism assembly 2 Refer to Section 3 12 1 and remove the reel pulley 3 Remove the two screws 1 then remove the clutch mounting assembly 2 Assembly Notes 1 Align the two holes 3 with the shafts 4 and 5 Be careful not to press part A of the clutch moun...

Page 40: ...embly 4 Fig 3 12 3 3 12 4 T Soft Brake Assembly Take Up Reel Assembly T Reel Gear 1 Remove the T soft spring 1 2 Remove the clamp 2 then remove the T soft brake assembly 3 3 Refer to Section 3 12 2 and remove the clutch mount ing assembly 4 Pressing the T brake assembly 4 in the direction of the arrow remove the take up reel assembly 5 washer 6 and the T reel gear 7 Assembly Note 1 After cleaning ...

Page 41: ...gear 1 2 5 Remove the clutch change spring 3 6 Remove the clamps 4 and 5 then remove the brake control lever 6 Remove the clamp 4 on the topside of the mechanism chassis 7 Remove the brake return spring 7 8 Refer to Section 3 8 and remove the worm gear assembly 9 Remove the clamp 8 and clamp 5 then remove the brake act lever assembly 9 To maintain the perfor mance of the brake act lever assembly 9...

Page 42: ...he shaft 5 shown in Fig 3 13 3 and to the BT spring lever assembly 3 and the S brake act slide 1 shown in Fig 3 13 4 2 After mounting the BT spring lever assembly 3 on the Shaft 5 hook the BT spring onto the clamp 6 and press it until it touches the pin 7 3 Make sure that the clamps 8 9 and 0 have snapped into the S brake act slide 1 Align the arrow on the S brake act slide 1 with the arrow on the...

Page 43: ...CT direction When tape unloading begins watch out in case the S and T incline mounting assemblies 1 and 3 get caught in the rail 3 After replacing the parts clean the cylinder and the roller guide then adjust the tape path as described in Section 4 3 Fig 3 14 2 3 14 Guides 3 14 1 Guide Roller Assembly 1 Unscrew the two screws 1 When you do this be careful not to damage the cylinder or the video he...

Page 44: ...er to Section 3 9 2 and check the positioning of the OPT pinch relay gear the pinch cam gear and the pinch lift cam 3 Align the hole in the crescent slide with the hole in the mechanism chassis as shown at point C in Fig 3 15 2 refer to Section 3 16 and see the holes 6 and 7 in Fig 3 16 1 4 When fitting the main cam 4 position the OPT pinch relay gear 6 and the front rack gear as shown at points D...

Page 45: ...Fig 3 16 1 and to the crescent slide 4 shown in Fig 3 16 2 2 Before fitting the crescent slide 4 refer to Section 3 13 3 and align the arrow on the S brake act slide with the arrow on the mechanism chassis Then refer to Fig 3 17 3 and check that the S load gear and the T load gear have completed tape unloading 3 When assembling the parts raise the right side of the crescent slide 4 slightly and ke...

Page 46: ...pply grease VHJ 0100 to the shafts 8 9 and parts A shown in Fig 3 17 1 Then apply grease VHJ 0100 to the parts shown in Fig 3 17 2 2 When fitting the S load gear 2 and the T load gear 5 align them in the tape loaded state as shown in Fig A in Fig 3 17 3 Again after completing tape unloading on these gears check that they are positioned as shown in Fig B in Fig 3 17 3 then refer to Section 3 14 2 a...

Page 47: ... go so that they do not protrude above the top of their holders 2 Do the soldering quickly Fig 3 18 1 3 18 2 Reel Sensor 1 Refer to Sections 3 12 2 and 3 12 4 then remove the clutch mounting assembly the T soft brake assembly and the take up reel assembly 2 Refer to Section 3 13 2 then remove the wheel gear 2 the wheel gear 1 and the brake control lever 3 Remove the soldering from the MC 1 PWB ass...

Page 48: ...2 then remove the EP switch lever 3 Assembly Notes 1 Apply grease VHJ 0100 to the protrusion 4 on the back of the EP switch lever 3 2 After fitting the cassette mechanism assembly check that in EJECT mode the EP switch lever 3 does not touch the EP switch 5 Fig 3 18 3 1 EP switch spring 3 EP switch lever 5 EP switch 2 Clamp 4 Protrusion on back apply grease here ...

Page 49: ...orque value of the reel table on the supply side It should be at least 600 g cm Take the measurement with the torque dial gauge VHJ 0004 held in position in your hand lock torque While taking the measurement rotate the reel table take up reel assembly on the take up side with your hand so that the reel sensor does not respond 3 After switching to FF mode wait for at least 10 seconds and then measu...

Page 50: ... Check that the back tension torque is between 25 and 50g cm 4 3 Tape Path Adjustment In normal circumstances the tape path system does not need to be adjusted However after removing or replacing one of the parts shown in Fig 4 3 1 you should check and adjust the tape path The adjustment of the tape path is carried out while monitoring the envelope waveform of the video head output using an oscill...

Page 51: ...embly Height Adjustment 1 Refer to Sections 3 9 2 and remove the opener mounting 2 Position the height adjustment tool VHJ 0111 3 under the full surface of the protrusion 2 on the load lever assembly 1 as shown in Fig 4 3 2 3 Using your fingers gently screw the adjustment nut 4 clockwise into the nut box VHJ 0048 5 until the protrusion 2 of the load lever assembly 1 touches the height adjustment t...

Page 52: ...sappear but sinks into the flat part as shown in Fig 4 3 4 d If this happens the status shown in Fig 4 3 4 c is normal so loosen the S guide roller then tighten it again until the envelope waveform is as shown in Fig 4 3 4 c 2 Check that at the tracking centre the output of the front half of the envelope waveform is not less than 80 of the maximum 3 Rotate the S guide roller 20 d counterclockwise ...

Page 53: ...waveform actual azimuth adjustment Fig 4 3 5 2 Horizontal position adjustment 1 Play the alignment tape VHJ 0006 2 Press the tracking buttons tracking and tracking _ simultaneously and set the tracking to the centre 3 Using an oscilloscope observe the waveform of the video head output 4 Loosen the two fixed screws on the audio R P head ACE head by between 20 d and 30 d anticlockwise 5 Using a slot...

Page 54: ...diately when you switch from PLAY to REV or from REV to PLAY Check that there is no slack in the tape next to the pinch roller 4 Check that the envelope waveform is activated immediately when you switch to PLAY from FF REW CUE REV or STOP mode Check that there is no slack in the tape next to the pinch roller 5 Check that the tape is not curling or riding up on the upper or lower flanges of the tap...

Page 55: ...t be sure to tracking center position after starting playback to prevent auto tracking from being set 3 1 1 Test Equipment and Standards Required Color Bar Signal Generator NTSC color bar signal with 100 white level EIA color bar signal Oscilloscope Vertical sensitivity 5 mV DIV external trigger Bandwidth more than 10 MHz Alignment Tape VHJ 0007 EP mode monoscope Blank Tape VHS cassette tape Monit...

Page 56: ...g adjustments press the EJECT button more than 1 second and check the Indicator shows P at this time n Repeat steps 1 to 4 if the adjustment takes more then 20 seconds 3 1 4 24 H Play Tracking Confirm and Adj Measuring Point Measuring Equipment Adj Condition Picture of Color bar generator Self recording monitor TV Monoscope pattern 8 H mode signal Monitor TV 24 H PLAY mode Blank tape Adj Condition...

Page 57: ...ed for 0 5 seconds 4 Set the tracking control position to the center by pressing TRACKING and _ buttons simulta neously and confirm the absence of noise in the slow playback image on the monitor screen at this centered tracking position Starting from this centered tracking position push the and _ buttons and confirm that no noise appears before the fifth push in either direc tion If noise appears ...

Page 58: ...e the adjustments described in Section 3 1 Servo Circuit 3 2 1 Test Equipment and Standards Required Color Bar Signal Generator NTSC color bar signal with 100 white level EIA color bar signal monoscope signal Frequency Counter Oscilloscope Vertical sensitivity 5 mV DIV external trigger Bandwidth more than 10 MHz Oscilloscope Probe Input capacity less than 25 pF 10 1 less than 40 pF 1 1 Covering fr...

Page 59: ... differ from those used for the unit These are because of parts common ality and improvement Parts list has the present standardized repair parts 3 Stock of Parts Parts marked with o at SP Supply Code column of the spare parts list may not be stocked Therefore the delivery date will be delayed 4 Harness Harnesses with no part number are not registered as spare parts In need of repair get component...

Page 60: ...8344 348 A s MOUNTED CIRCUIT BOARD TM 2 5 A 8344 347 A s MOUNTED CIRCUIT BOARD TM 1 For SVT RA168 A 8344 473 A s MOUNTED CIRCUIT BOARD TM 1 For SVT RA40 6 1 251 828 11 s SOCKET AC INLET 7 1 518 833 11 s INDICATOR TUBE 8 3 203 300 01 s COVER BOTTOM 9 3 203 326 01 s DOOR CASSETTE 10 3 206 683 01 s SPACER OPT CAM 11 3 740 330 01 s LOCK 12 3 740 382 01 s SCREW 4X12 13 3 940 396 01 o PLATE SPRING 4 2 E...

Page 61: ... HOLDER GEAR 106 3 960 939 01 s SCREW 2 6X6 SPECIAL 107 3 960 952 01 o STAND L 108 3 960 954 01 s FRAME LOWER 109 3 960 959 01 s GEAR LOCK 110 3 960 960 01 s GEAR PINION 111 3 961 301 01 s SPRING LID OPENER 112 3 961 302 01 s LEVER RELEASE 113 3 961 303 01 s SPRING TRAY LOCK SCREW Part No SP Description 7 685 647 79 s SCREW BVTP3X10 EP FE ZNBK CM2 not supplied not supplied 101 107 106 106 112 111 ...

Page 62: ... 206 3 193 651 01 s SPRING BT SUB TL 207 3 193 669 01 s HEAD ERASE FULL 208 3 735 630 01 s ROLLER ASSY GUIDE 209 3 735 754 01 s WASHER ADJ PLA 210 3 735 760 01 s WASHER SPECIAL 3 PLA No Part No SP Description 211 3 960 927 01 s GEAR S REEL 212 3 960 984 01 s SCREW 2 6X10 SPECIAL 213 3 961 002 01 s LEVER S SOFT 214 3 961 003 01 s SPRING S SOFT 215 3 961 016 01 s LEVER ASSY BT 216 3 961 037 01 s MOU...

Page 63: ...PRING BRAKE 90 308 3 206 563 01 s SCREW 4X6 309 3 206 564 01 s CYLINDER UPR 310 3 206 565 01 s MOUNT MOTOR CYLINDER 311 3 206 679 01 s GROUND CYLINDER CHIP 312 3 206 680 01 s SPRING CYLINDER GROUND No Part No SP Description 313 3 206 681 01 s MOTOR CYL DC2W ROTOR 314 3 206 682 01 s MOTOR CYLDC2WVN STARTER 315 3 686 999 01 s SCREW B 2 6X4 ZNBK CM2 ST 316 3 746 760 01 s SCREW 2 3X6 SPECIAL 317 3 948...

Page 64: ... 413 3 203 303 01 s GEAR PINCH CAM JG 414 3 203 304 01 s MOUNTING OPENER JG 415 3 204 110 01 s MOUNT ASSY LIFT JG 416 3 735 630 01 s ROLLER ASSY GUIDE 417 3 735 760 01 s WASHER SPECIAL 3 PLA 418 3 961 001 01 s SPRING T SOFT 419 3 961 008 01 s SLIDE T ACT BRAKE 420 3 961 021 01 s SCREW 2 6X6 SPECIAL No Part No SP Description 421 3 961 024 01 s LEVER ASSY PINCH ROLLER 422 3 961 026 01 s SPRING PINCH...

Page 65: ... s SCREW 2 6X6 SPECIAL 512 3 960 929 01 s BELT REEL RBR 513 3 960 995 01 s GEAR S ROAD 514 3 960 996 01 s SPRING S ROAD 515 3 960 997 01 s LEVER ASSY S ROAD 516 3 960 998 01 s GEAR T ROAD No Part No SP Description 517 3 961 007 01 s SLIDE S ACT BRAKE 518 3 961 011 01 s SPRING BRAKE RETURN 519 3 961 012 01 s LEVER CLUTCH CHANGE 520 3 961 013 01 s SPRING CLUTCH CHANGE 521 3 961 032 01 s SCREW 2 6X6 ...

Page 66: ...board SVT RS100 not supplied supplied with D sub connector These parts are attached with SVT RS100 601 D sub connector Optional Board SVT RS100 No Part No SP Description 601 3 940 396 01 o PLATE SPRING SCREW Part No SP Description 7 685 645 79 s SCREW BVTP3X6 EP FE ZNBK CM2 ...

Page 67: ...F25V C3031 1 165 929 11 s CAPACITOR CERAMIC 0 068MF25V C3032 1 162 921 11 s CAPACITOR CERAMIC 33PF 50V CH C3033 1 162 921 11 s CAPACITOR CERAMIC 33PF 50V CH C3034 1 162 921 11 s CAPACITOR CERAMIC 33PF 50V CH C3035 1 162 924 11 s CAPACITOR CERAMIC 56PF 50V CH C3036 1 162 924 11 s CAPACITOR CERAMIC 56PF 50V CH C3037 1 162 924 11 s CAPACITOR CERAMIC 56PF 50V CH C3038 1 126 916 11 s CAPACITOR ELECT 10...

Page 68: ...46 R Q3014 8 729 901 81 s TRANSISTOR 2SC2412K T 146 R Q3015 8 729 901 81 s TRANSISTOR 2SC2412K T 146 R Q3016 8 729 901 81 s TRANSISTOR 2SC2412K T 146 R Q3017 8 729 026 49 s TRANSISTOR 2SA1037AK T146 R Q3018 8 729 026 49 s TRANSISTOR 2SA1037AK T146 R Q3019 8 729 901 81 s TRANSISTOR 2SC2412K T 146 R Q3020 8 729 026 49 s TRANSISTOR 2SA1037AK T146 R Q3101 8 729 027 59 s TRANSISTOR DTC144EKA T146 Q3102...

Page 69: ... CHIP 10K 1 16W 1608 R3117 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R3118 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R3119 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R3120 1 216 829 11 s RESISTOR CHIP 4 7K 1 16W 1608 R3121 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R3122 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R3126 1 249 411 11 s RES CARBON 330 1 4W SMALL R3127 1 249 401 11 s RES CARBON...

Page 70: ...V 105 C1210 1 127 550 11 s CAPACITOR ELECT 3 3MF 16V SOLI C1211 1 137 643 11 s CAPACITOR ELECT 10MF 16V VA A BOARD Ref No or Q ty Part No SP Description C1213 1 165 931 11 s CAPACITOR CERAMIC 0 01MF 50V C1221 1 162 918 11 s CAPACITOR CERAMIC 18PF 50V CH C1222 1 162 918 11 s CAPACITOR CERAMIC 18PF 50V CH C1223 1 162 918 11 s CAPACITOR CERAMIC 18PF 50V CH C1224 1 162 923 11 s CAPACITOR CERAMIC 47PF ...

Page 71: ... 759 433 44 s IC MM1031XML IC121 1 804 822 11 s IC LC74781 9832 IC131 1 804 147 11 s IC TL8825P IC132 1 804 181 11 s IC BA7611AN IC211 1 801 984 11 s IC LA6458D VA A BOARD Ref No or Q ty Part No SP Description JK101 1 251 892 11 s SOCKET BNC JK102 1 251 892 11 s SOCKET BNC JK201 1 794 475 11 s RCA 2 JACK JK202 1 784 069 11 s JACK HOON D3 6 L1001 1 410 519 11 s MICRO INDUCTOR 68UH L1002 1 410 518 4...

Page 72: ...216 821 11 s RESISTOR CHIP 1 0K 1 16W 1608 VA A BOARD Ref No or Q ty Part No SP Description R1104 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R1111 1 216 821 11 s RESISTOR CHIP 1 0K 1 16W 1608 R1112 1 216 821 11 s RESISTOR CHIP 1 0K 1 16W 1608 R1113 1 216 841 11 s RESISTOR CHIP 47K 1 16W 1608 R1114 1 216 841 11 s RESISTOR CHIP 47K 1 16W 1608 R1116 1 216 817 11 s RESISTOR CHIP 470 1 16W 1608 R1117 ...

Page 73: ...OR CHIP 10K 1 16W 1608 R1854 1 245 319 11 s RESISTOR CHIP 180 R1856 1 216 826 11 s RESISTOR CHIP 2 7K 1 16W 1608 R2001 1 218 850 11 s RESISTOR CHIP 1 3K 1 10W 1608 R2002 1 216 838 11 s RESISTOR CHIP 27K 1 16W 1608 R2003 1 216 851 11 s RESISTOR CHIP 330K 1 16W 1608 R2004 1 216 813 11 s RESISTOR CHIP 220 1 16W 1608 R2005 1 243 814 11 s RESISTOR CHIP 16W R2006 1 216 829 11 s RESISTOR CHIP 4 7K 1 16W ...

Page 74: ...140 53 s IC UPD4053BC IC005 1 803 882 11 s IC MAX3082CSA JK002 1 816 618 11 s JACK MODULAR 4 JK003 1 816 618 11 s JACK MODULAR 4 L0001 1 414 540 11 s INDUCTOR 1 1UH R0001 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R0002 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R0003 1 216 833 11 s RESISTOR CHIP 10K 1 16W 1608 R0004 1 216 820 11 s RESISTOR CHIP 820 1 16W 1608 R0005 1 216 833 11 s RESISTOR CHIP ...

Page 75: ... IC 1 0A 50V Q5002 1 809 602 11 s TRANSISTOR 2SC2274 F AA Q5003 8 729 140 97 s TRANSISTOR 2SB734 34 Q5004 1 809 602 11 s TRANSISTOR 2SC2274 F AA Q5010 1 801 298 11 s TRANISTOR 2SK2434 Q5140 8 729 024 68 s TRANSISTOR 2SD1801 S Q5141 8 729 029 56 s TRANSISTOR DTA144ESA Q5142 8 729 027 59 s TRANSISTOR DTC144EKA T146 R5001 1 240 219 11 s RESISTOR SOLID 2 7M R5002 1 247 887 00 s RESISTOR CARBON 220K 1 ...

Page 76: ...9 11 s RESISTOR CARBON 68K 1 4W SMALL R7109 1 249 439 11 s RESISTOR CARBON 68K 1 4W SMALL R7114 1 249 439 11 s RESISTOR CARBON 68K 1 4W SMALL R7115 1 249 439 11 s RESISTOR CARBON 68K 1 4W SMALL R7116 1 249 439 11 s RESISTOR CARBON 68K 1 4W SMALL R7117 1 249 439 11 s RESISTOR CARBON 68K 1 4W SMALL R7118 1 249 439 11 s RESISTOR CARBON 68K 1 4W SMALL R7120 1 249 425 11 s RESISTOR CARBON 4 7K 1 4W R71...

Page 77: ...IED ACCESSORIES FOR SVT RA40 RA168 A SVT RA40 B SVT RA168 Ref No or Q ty Part No SP Description 1pc 1 824 298 11 s CORD POWER 1pc B 3 206 574 01 s MANUAL INSTRUCTION 1pc A 3 206 678 01 s MANUAL INSTRUCTION PACKING MATERIALS SUPPLIED ACCESSORIES FOR SVT RS100 Ref No or Q ty Part No SP Description 1pc 3 206 934 01 s MANUAL INSTRUCTION 1pc 3 940 396 01 o PLATE SPRING 1pc 7 685 645 19 s SCREW BVTP3X6 ...

Page 78: ......

Page 79: ...S B2 RD5 6ES B2 RD6 2ES B2 1SS133T 77 1SS244 T 77 1SS83 GMA01U BT PN263L NC CATHODE ANODE ANODE CATHODE ANODE CATHODE SEL2910D D SEL2910D TP2 D SEL2410GM LN59L TRANSISTOR E C B B E C E C B E B C E B C 2SC2274 F AA 2SD734E 2SD734 E 2SC3331 S AA 2SB734 34 DTC114EF DTC114EL TL2 2SC1009A 2SC2814 F4 TB E B C LETTER SIDE E C B E C B GND IN OUT E C B 2SA1318 S 2SK2434 2SA1037AK T146 QR 2SA1037AK T146 R 2...

Page 80: ...TOPVIEW 1 TOPVIEW 1 TOPVIEW 1 L5431 AA LA71582M MPB LB1643L LC74781 9832 MAX3082CSA MM1031XML MN12510F MN1381 R PST9128NR TL8825P UPD78F0034AGK P013BA TC4S30F TC4S81F BA7611AN BR24C08 LA6458D TC4053BP N UPD4053BC MAX202CSE LA7116 OTHER GPIS094HCZ PS2501 1D SG 105F ...

Page 81: ...6 1 SVT RA40 RA168 6 1 Overall Overall Overall Wiring Section 6 Block Diagrams ...

Page 82: ...6 2 SVT RA40 RA168 6 2 MC 1 DEW SEMSOR MH MC MC 5 Mechanism Connection Mechanism Connection Mechanism Connection ...

Page 83: ...6 3 SVT RA40 RA168 6 3 IC101 Audio Circuit Audio Circuit Audio Circuit ...

Page 84: ...6 4 SVT RA40 RA168 6 4 IC101 IC121 IC132 Video Circuit Video Circuit Video Circuit ...

Page 85: ...SVT RA40 RA168 6 5 IC306 IC301 SYSTEM CONTROL TIMER TUNING CONTROL MPU IC302 IC303 IC711 IC305 IC301 IC309 IC304 IC308 System Control Servo Circuit System Control Servo Circuit System Control Servo Circuit ...

Page 86: ......

Page 87: ... I I I O O O O O Signal to use RS232C or RS485 232C low 8 Enable signal to RS485 data out 9 Ground terminal 10 Always 5V 18 Data from system control IC Transferring signal data 19 Data to system control IC Return signal data 20 Clock signal to system control CPU 21 Data from controller Through RS232C or RS485 22 Data to controller Through RS232C or RS485 23 24 25 36 34 35 40 41 Return signal to co...

Page 88: ...7 2 SVT RA40 RA168 7 2 2 3 4 5 A B C D E F G H 1 CP 1 VA A CP 1 VA A CP 1 Board VA A Video Audio ...

Page 89: ...7 3 SVT RA40 RA168 7 3 2 3 4 5 1 I J K L M N O P CP 1 VA A CP 1 VA A ...

Page 90: ... o l a n g i s g n i t a c i d n i e d o m g n i d r o c e R 6 4 T U O D N E E P A T O H t u p t u o l a n g i s l o r t n o c d n e e p a T 7 4 T U O G N I N R A W O H t u p t u o g n i n r a W 8 4 T U O M R A L A O H t u p t u o l a n g i s g n i t a c i d n i e d o m m r a l A 9 4 P U R E W O P O H f f o s i r e w o p e h t t p e c x e t u p t u o H 0 5 H C E R O H e d o m g n i d r o c e r g n...

Page 91: ...7 5 SVT RA40 RA168 7 5 2 3 4 5 1 A B C D E F G H UPD78F4928GF P23 3BA CP 1 SY A CP 1 SY A CP 1 Board SY A System Control Servo ...

Page 92: ...3G 4G 5G 6G 7G 8G 9G col col 1a 1a 2a 2a 2a 2a 2a 2a 2a 2d 2g 1a 1b 1b 1g 1g 1g 1g 1c 1c 1d 1d 1d 1a 1a 1a 1d 1e 1e 1 h 1 b 1 b 1 f 1 f 2 b 2 c 2 e 2 f 1 e 1 e 1 c 1 c 1 h 1f 1f 1h 1h 1h GR 05000 RE4QM EXSY R L WAVEFORM TEST POINT LOCATION WAVEFORM TEST POINT LOCATION IC301 PIN 9 10 REC 2V div 20us div IC301 PIN 85 REC 2V div 10ms div IC301 PIN 93 REC 2V div 200us div WF S EC4Q IC301 PIN 96 REC 10...

Page 93: ...7 7 SVT RA40 RA168 7 7 2 3 4 5 1 A B C D E F G H TM 1 TM 2 TM 1 TM 2 TM 1 TM 2 Board Display Key Scan ...

Page 94: ...7 8 SVT RA40 RA168 7 8 2 3 4 5 A B C D E F G H 1 PW 1 PW 1 PW 1 Board Power Supply ...

Page 95: ...230 R3062 J3228 J3198 R3160 R3154 R3156 R3157 R3155 R3159 R3161 J3199 J3200 R3158 R3169 J3281 CN352 L3012 L3004 L3005 L3006 L3007 L3008 L3009 L3010 J3285 J3284 J3283 J3282 J3286 J3287 J3288 L3011 J3289 J3290 C3149 J3184 J3018 R3148 J3185 IC101 J1202 J1201 R1201 C1236 Q1201 R1212 Q1214 Q1210 R1214 Q1211 R1213 C1212 Q1212 R1218 R1217 R1216 R1215 Q1213 R1231 C1234 C1221 C1222 C1223 C1224 C1232 R1230 ...

Page 96: ... R7120 R7121 J7152 R7115 R7114 R7116 C7115 C7116 CN711 R7132 J7127 J7128 J7104 SHUTTLE CLK FAST J7115 J7116 C7103 1 5 10 15 20 25 30 35 1SREC REAL 1 2 10 16 15 2 1 9 10 CN721 STOP S7204 S7210 S7205 S7209 S7206 S7208 S7202 S7207 S7201 S7203 REC CHECK REC EJECT SEARCH AD PLAY REV REW PLAY FF PAUSE J7207 J7205 J7206 J7204 J7203 J7201 J7202 J7208 1AC4B10F1400BB PWB TM 2 CMK P2X 1 9 1 16 8 9 OFF ON 1 3...

Page 97: ...5017 Q5003 Q5002 Q5004 D5011 D5006 D5003 C5014 R5003 C5011 D5108 C5030 T5001 JW501 JW502 1 JW504 1 1AC4B10C40000F J5020 J5011 D5101 C5103 D5104 D5102 J5101 L5102 C5104 C5101 L5101 C5108 C5102 J5107 D5110 J5104 J5102 J5105 C5124 1 CN512 15 D5109 C5105 C5109 J5111 J5110 J5112 J5113 J5114 R5104 Q5140 R5140 R5141 Q5141 C5140 J5010 C5012 J5022 J5021 R5002 J5024 J5120 J5121 Q5103 J5116 C5110 J5012 Q5142...

Page 98: ......

Page 99: ...1 A commercial leakage tester such as the Simpson 229 or RCA WT 540A Follow the manufacturers instructions to use these instruments 2 A battery operated AC milliammeter The Data Precision 245 digital multimeter is suitable for this job 3 Measuring the voltage drop across a resistor by means of a VOM or battery operated AC voltmeter The limit indication is 0 75 V so analog meters must have an accur...

Page 100: ...Printed in Japan Sony Corporation 2002 5 08 B P Company 2002 SVT RA40 UC SVT RA168 UC E 9 955 359 01 ...

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