Sharp VC-A598U Service Manual Download Page 76

Page: 76 / 90

Ref. No.

Part No.

★

Description

Code

Ref. No.

Part No.

★

Description

Code

VC-A598U/H995U/H996U
-H997U/H9977U/H998U

DIODES

DG801

VVKSTV6SS44-1

V Display (VC-A598U)

DG801

VVK20U26108-1

V Display

(Except VC-A598U)

D351

RH-DX0475CEZZ

V Diode (Except VC-A598U) AB

D701

RH-PX0270GEZZ

J Cassette LED

D702

RH-DX0475CEZZ

V Diode

D706

RH-PX0252GEZZ

J Supply Reel Sensor

D707

RH-PX0252GEZZ

J Take-up Reel Sensor

D708

RH-PX0253GEZZ

J CAM Switch A

D709

RH-PX0253GEZZ

J Cam Switch B

D712

RH-DX0475CEZZ

V Diode

D715

RH-DX0475CEZZ

V Diode

D716

RH-DX0475CEZZ

V Diode

D790

VHDRL1N4004-1

V DRL1N4004

D791

VHDRL1N4004-1

V DRL1N4004

D901

VHDRL1N4004-1

V DRL1N4004

D902

VHDRL1N4004-1

V DRL1N4004

D903

VHDRL1N4004-1

V DRL1N4004

D904

VHDRL1N4004-1

V DRL1N4004

D905

VHD10ELS4//-1

V 10ELS4

D907

RH-DX0475CEZZ

V Diode

D912

RH-EX0601GEZZ

V Zener Diode

D913

RH-DX0475CEZZ

V Diode

D921

VHD10ELS4//-1

V 10ELS4

D922

VHD10ELS4//-1

V 10ELS4

D923

VHD15DF1FC/1E

V 15DF1FC

D924

VHD10ELS4//-1

V 10ELS4

D926

VHD10ELS4//-1

V 10ELS4

D928

VHDD1NS4///-1

V 1NS4

D951

RH-EX0677GEZZ

V Zener Diode

D952

RH-EX0601GEZZ

V Zener Diode

D957

VHD1S40////-1

V 1S40

D991

RH-EX0631GEZZ

J Zener Diode

D992

RH-DX0475CEZZ

V Diode

IC901

RH-FX0034CEZZ

V PC817

Q701

RH-PX0233GEZZ

J Start Sensor

Q702

RH-PX0233GEZZ

J End Sensor

CRYSTALS

X501

RCRSB0265GEZZ

J Crystal

X701

RCRSB0205GEZZ

J Crystal

COILS

L101

VP-CF101K0000

V Paeking 100

L201

VP-XF820K0000

V Paeking 82

L301

VP-MK101K0000

V Paeking 100

(VC-A598U)

L301

VP-2K101K0000

V Paeking 100

(Except VC-A598U)

L351

VP-2K101K0000

V Paeking 100

(Except VC-A598U)

L503

VP-XF120K0000

V Paeking 12

L602

VP-DF221K0000

V Paeking 220

L851

VP-DF221K0000

V Paeking 220

(Except VC-A598U/H995U)

L901

RCILF0002AJZZ

V Coil

L921

RCILP0147GEZZ

V 10

L922

RCILP0147GEZZ

V 10

TRANSFORMERS

T601

RTRNH0086GEZZ

J OSC. Transformer

T901

RTRNZ0048AJZZ

V Transformer

CONTROL

R142

RVR-M4334GEZZ

J Variable Resistor

(Except VC-A598U)

R144

RVR-M4343GEZZ

J 100k (Except VC-A598U) AB

R724

RVR-M4343GEZZ

J 100k, PG MM

CAPACITORS

C101

VCKYCY1HB221K V 220p 50V Ceramic

C103

VCEA9M0JW107M V 100

6.3V Electrolytic

C105

VCEA0A0JW108M V 1000 6.3V Electrolytic

C106

VCKYCY1HF103Z

V 0.01

50V Ceramic

TUNER

NOTE:

THE PARTS HERE SHOWN ARE SUPPLIED AS AN

ASSEMBLY BUT NOT INDEPENDENTLY.

TU101

VTUENG56701-1

V Tuner

INTEGRATED CIRCUITS

IC201

VHiHA8317NF-1

V HA118317NF

IC601

VHiBA7755A/-1

V BA7755A

IC651

VHiAN3662FB-1

V AN3662FBP

(Except VC-A598U)

IC701

RH-iX1561GEN2

V I.C.

IC702

VHiPST600H/-1

V IC-PST600H-2

IC706

VHiLB1988//-1

V LB1988

IC710

VHiBR2401E2-1

V BR24C01AF

IC801

VHiMN12511/-1

V MN12511

IC903

VHiKiA431//-1

V KIA431

TRANSITORS

Q251

VS2SA1037KQ-1

V 2SA1037KQ

Q302

VS2SD1306-E1E

V 2SD1306-E

Q306

VS2SA1037KQ-1

V 2SA1037KQ

Q501

VS2SC2412KQ-1

V 2SC2412KQ

(Except VC-A598U)

Q602

VS2C3939SQR-1

V 2C3939SQR

Q603

VS2SC2412KQ-1

V 2SC2412KQ

Q651

VS2SD1306-E1E

V 2SD1306-E

(Except VC-A598U)

Q652

VS2SD1306-E1E

V 2SD1306-E

(Except VC-A598U)

Q653

VSUN2113///-1

V UN2113

(Except VC-A598U)

Q654

VSUN2212///-1

V UN2212

(Except VC-A598U)

Q656

VSUN2212///-1

V UN2212

(Except VC-A598U)

Q704

VS2SA1037KQ-1

V 2SA1037KQ

Q705

VSKRC102S//-1

V KRC102S (VC-A598U)

Q705

VSUN2211///-1

V UN2211

(Except VC-A598U)

Q706

VS2SA1037KQ-1

V 2SA1037KQ

Q710

VS2SC2412KQ-1

V 2SC2412KQ

Q711

VS2SC2412KQ-1

V 2SC2412KQ

Q712

VS2SA1037KQ-1

V 2SA1037KQ

Q851

VS2SD468-AC-1

V 2SD468-AC

(Except VC-A598U/H995U)

Q901

VS2SC4161//1E

V 2SC4161

Q902

VS2SD2144S/-1

V 2SD2144S

Q951

VS2SA1271-Y-1

V 2SA1271-Y

Q952

VSKRC103S//-1

V KRC103S (VC-A598U)

Q952

VSUN2212///-1

V UN2212

(Except VC-A598U)

Q955

VS2SB1117KU1E

V 2SB1117KU

Q956

VSKRC103S//-1

V KRC103S (VC-A598U)

Q956

VSUN2212///-1

V UN2212

(Except VC-A598U)

Q963

VS2SA1037KQ-1

V 2SA1037KQ

Q981

VS2SA1271-Y-1

V 2SA1271-Y

Q982

VSKRC103S//-1

V KRC103S (VC-A598U)

Q982

VSUN2212///-1

V UN2212

(Except VC-A598U)

Q983

VS2SA1271-Y-1

V 2SA1271-Y

(Except VC-A598U)

Q984

VSUN2212///-1

V UN2212

(Except VC-A598U)

Q991

VS2SC3203Y/-1

V 2SC3203Y

Q992

VS2SA1037KQ-1

V 2SA1037KQ

Q993

VSKRC103S//-1

V KRC103S (VC-A598U)

Q993

VSUN2212///-1

V UN2212

(Except VC-A598U)

DUNTK5700TE

V8/VL/VM/VN

Main Unit

Summary of Contents for VC-A598U

Page 1: ...SPECIFICATIONS 5 1 3 LOCATION OF MAJOR COMPONENTS AND CONTROL 6 2 DISASSEMBLY AND REASSEMBLY 7 2 1 DISASSEMBLY OF MAJOR BLOCKS 7 2 2 DISASSEMBLING THE MECHANISM MAIN PWB ASSEMBLY 8 2 3 CARES WHEN REASSEMBLING 9 3 FUNCTION OF MAJOR MECHANICAL PARTS 10 4 ADJUSTMENT REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS 12 4 1 MECHANISM CONFIRMATION ADJUSTMENT JIG 12 5 ELECTRICAL ADJUSTMENT 31 5 1 ADJUSTMENT O...

Page 2: ...etallic control knobs insulation materials cabinet backs adjustment and compartment covers or shields isola tion resistor capacitor networks mechanical insula tors etc 3 To be sure that no shock hazard exists check for current in the following manner Plug the AC line cord directly into a 120 volt AC outlet Do not use an isolation transformer for this test Using two clip leads connect a 1 5k ohm 10...

Page 3: ...dans une prise de courant de 120 volts Ne pas utiliser de transformateur d isolement pour cet essai Utiliser deux fils à pinces et connecter une résistance de 10 watts 1 5 kohm en parallèle avec un condensateur de 0 15 µF en série avec des pièces du coffret métallique exposées et une masse de terre connue telle qu un tuyau ou un conduit d eau Utiliser un VTVM ou VOM avec une sensibilité de 1000 oh...

Page 4: ...ent of part with the mechanism and its PWB in position in the main frame 1 Start and end sensors Q701 and Q702 Insert the sensor s projection deep into the upper hole of the holder Referring to the PWB fix the sensors tight enough 2 Photocoupler IC901 Refer to the symbol on the PWB and the anode marking of the part 3 Cam switches A and B D708 and D709 Adjust the notch of the part to the white mark...

Page 5: ...8 kg 6 17 lbs Accessories included 75 ohm coaxial cable Operation manual Registration card Infrared remote control Dry Battery 2 pcs Note Specifications may be changed for improvement without notice 1 2 SPECIFICATIONS High speed FF REW 400 EZ Set Up S VHS Quasi Playback Double Azimuth 4 Head 19µm Clear Picture System in EP Mode HQ System for Better Resolusion and color Reproduc tion 3 Language OSD...

Page 6: ...VC A598U H995U H996U H997U H9977U H998U 6 1 3 LOCATION OF MAJOR COMPONENTS AND CONTROL ...

Page 7: ...GLE Remove 1 screws 6 with shield angle MECHANISM Remove 1 screw 7 1 screw 8 2 MAIN PWB screws 9 2 screws 0 Remove 1 screw q with antenna terminal cover Remove 1 screw w with top cabinet fix angle LOCATOR PWB Remove 1 screw e VC H998U FRONT PANEL LOCATOR PWB TOP CABINET SHIELD ANGLE H A SHIELD TOP ANTENNA TERMINAL COVER MECHANISM MAIN PWB ASSEMBLY TOP CABINET FIX ANGLE MAIN FRAME VC H996U H997U H9...

Page 8: ...nna cover Remove the PWB bottom plate 1 screw 2 Remove the FFC cable AA AD AH 3 which con necting the PWB and the mechanism Take out vertically the mechanism so that it does not damage the adjacent parts 2 Removing the mechanism and cassette housing Remove 2 screws 4 fixing the cassette housing to the mechanism and remove the cassette housing MECHANISM CHASSIS 2 1 3 4 CASSETTE HOUSING MAIN PWB ...

Page 9: ...CTOR Tilt mark 1 INSTALLING THE CASSETTE HOUSING When the cassette housing is installed on the mechanism the initial setting is essential condition There are two initial setting methods namely electrical and mechanical 1 Electrical initial setting So as to perform initial setting of mechanism execute the Step 1 of Installation of cassette housing After ascertain ing the return to the initial setti...

Page 10: ...1 Full erase head 2 Sup pole base ass y 3 Tension arm 4 Idler ass y 5 Pinch drive lever ass y 6 Supply reel disk 7 Sup main brake 8 Tu main brake 9 Pinch drive cam 10 A C head ass y 11 Reverse guide 12 Casecon drive gear 13 Take up reel disk 14 Pinch roller lever ass y 17 15 10 11 5 9 14 12 8 16 13 4 6 2 7 3 1 18 ...

Page 11: ...MECHANICAL PARTS BOTTOM VIEW No Function No Function 15 Drum ass y 16 Loading motor 17 Drum drive motor 18 Tu pole base ass y 19 Slow brake 20 Master cam 21 Capstan D D motor 22 Reel belt 23 Clutch lever 24 Limiter pulley ass y 26 Shifter 26 24 21 22 19 20 12 23 ...

Page 12: ...rt to the threaded hole using resin with screw use the jig Specified torque 5 kg This cassette torque meter is used for check ing and adjusting the torque of take up for measuring tape back tension These Jigs are used for checking and adjusting the torque of take up and supply reel disks Master Plane Jig and Reel Disk Height Adjusting Jig Pinch pressing force measuring jig This Jig is used with th...

Page 13: ... Poor S N ratio no colour Poorflatnessoftheenvelope with alignment tape Cassette not loaded or un loaded No tape running tape slack Clean tape contact part with the specified cleaning liquid Abnormal rotation or significant vi bration requires replacement Clean rubber and rubber contact area with the speci fied cleaning liquid Clean tape contact area with the specified cleaning liquid Notaperunnin...

Page 14: ...g control and tool do not contact the guide pin or drum 5 After installing the cassette housing control once per form cassette loading operation TO RUN A TAPE WITHOUT THE CASSETTE HOUSING CONTROL ASSEMBLY 1 Remove the full surface panel 2 Short circuit TP801 3 Plug in the power cord 4 Turn off the power switch The pole bases move into U L position 5 Open the lid of a cassette tape by hand 6 Hold t...

Page 15: ...dhere the brake surface 2 After reassembly check the video search rewind back tension see page 18 and check the brake torque see page 20 Height checking and adjustment Note 1 Set the master plane with due care so that it does not contact the drum 2 When putting the master plane shift the reverse guide a little in the loading direction Care must be taken since excessive shift results in damage Figu...

Page 16: ...ter short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Setting 1 Set a torque gauge to zero on the scale Place it on the take up reel disk 2 Press the FF button 3 To calculate the remaining capacity of the play back mode slowly rotate the supply reel disk and then shift it into the forward mode Checking 1 Turn the torque gauge slowly one rotation every 2 to...

Page 17: ...d turn it counterclockwise very slowly one rotation every 1 to 2 seconds and check that the torque is within the set value 14 0 3 9mN m 144 40gf cm Figure 4 11 Torque gauge Supply reel disk Note Surely put the torque gauge on the reel disk to measure If the torque gauge is raised accurate measurement is impossible Adjustment If the rewinding playback winding up torque is not within the setting rep...

Page 18: ...ECKING THE VIDEO SEARCH REWIND BACK TENSION Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Checking 1 After pressing the play button press the rewind button and set the video search rewind mode 2 Place the torque gauge on the take up reel disk and turn it counterclockwise very slowly one rotation every ...

Page 19: ...ge left right CHECKING AND ADJUSTMENT OF RECORD PLAYBACK BACK TENSION Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Setting 1 Turn off the power switch 2 Open the torque cassette meter and fix with tape 3 Set the cassette tape in loading state 4 Put the weight 500g on the cassette torque meter 5 Turn o...

Page 20: ...10 8mN m 40 110gf cm Figure 4 20 CHECKING THE BRAKE TORQUE Checking the brake torque at the supply side CCW 2 9 9 8mN m 30 100gf cm CW 4 9 13 7mN m 50 140gf cm Figure 4 21 Tension arm Tension spring CW CCW CW Supply reel disk Torque gauge Torque gauge CCW Take up reel disk A B Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB pl...

Page 21: ... In unloading state unplug the power cord Removal 1 Remove the screws 123 Azimuth screw Tilt screw 2 Unsolder the PWB fitted to the A C head Notes 1 When replacing never touch the head If you touched clean with the cleaning liquid 2 When removing the screw 3 take care so that the spring may out New A C head ass y A C head PWB 2 Spring 1 Solder Never touch the head 10 8mm 10 8mm Azimuth screw Heigh...

Page 22: ...mm using the reverse guide height adjustment jig in tape loading state Refer to Figure 4 28 a b Figure 4 29 3 Set the tape and check for tape crease near the reverse guide in the playback mode If crease is found turn the reverse guide adjustment nut to remove crease As for crease check refer to Figure 4 30 a b Figure 4 28 2 Rotate counterclockwise the reverse guide height ad justment nut 1 10 turn...

Page 23: ...crew clockwise so that tape crease appears once at the flange and then return the tilt screw so that the crease disappears 2 If there is tape crease Turn counterclockwise the tilt screw so that the tape crease disappears Reference If the tilt screw is turned clockwise crease appears at the lower flange Guide roller Weight of 500g Cassette Tape 2 Adjustment of A C head height and azimuth 1 Perform ...

Page 24: ...just the playback switching point Refer to the electric adjustment method 6 Playback the self picture recorded tape and check the flatness of envelope waveform and sound Notes When the A C head X value adjustment is performed be sure to perform at first X value rough adjustment refer to Page 23 3 2 PB CHROMA Envelope CH 1 CH 2 Head switching pulse Figure 4 34 4 A C head X value adjustment 1 Tentat...

Page 25: ...allation adjust the playback switching point for adjustment of servo circuit REPLACEMENT OF THE CAPSTAN D D DIRECT DRIVE MOTOR Remove the mechanism from the main PWB refer to Page 8 item 1 When removing the mechanism from the main PWB Removal Follow the order of indicated numbers 1 Remove the reel belt 1 2 Remove the three screws 2 Figure 4 37 Reassembly 1 Taking care so that the capstan shaft doe...

Page 26: ...E UPPER AND LOWER DRUM ASSEMBLY Replacement Perform in the numerical order 1 Remove the motor as stated in Page 25 D D motor replacement 2 Remove the drum earth brush ass y 2 3 Remove the drum base 3 from the upper and lower drum assembly 1 Cares when replacing the drum 1 Be careful so that the drum earth brush is not lost 2 Do not touch directly the drum surface 3 Fit gently the screwdriver to th...

Page 27: ...Action Lever Ass y 3Insert Open Lever Insert reverse guide lever ass y Align here 2 Insert pinch drive cam Pinch drive lever ass y Fit the pinch drive cam so that the notch of pinch drive cam aligns with the dent of pinch drive lever assembly Fit the pinch drive cam so that the notch of pinch drive lever assembly aligns with the half round notch of chassis Turn the reverse guide lever assembly cou...

Page 28: ...t 3 3 For the phase matching at the insert point 1 see the point 2 as shown below 4 Finally fix the inserts 1 and 4 Capstan D D motor Drum Reel pulley Bottom side of mechanism chassis Sifter Phase Matching point 2 Insert point 1 Half round notch Shaft 1 Round mark Loading gear T Insert point 3 Insert point 4 Insert point 5 Release point 3 Phase matching point 1 Shaft 1 Shaft 1 Shaft 4 Insert point...

Page 29: ...placement Remove the loading motor and install the replacement loading motor as shown below Figure 4 46 Figure 4 44 2 Wheninstallingthemastercam align the casecon drive gear round mark with the half round notch of master cam The loading motor pressing in must be less than 14 7 N 1500 gf Adjust the distance between motor and pulley to 10 2 mm E ring XRESJ30 06000 Master cam Fully turn clockwise Ful...

Page 30: ...e Gear L and Drive Gear R ASSEMBLY OF CASSETTE HOUSING 1 Drive Gear and R Drive angle ass y Figure 4 47 MSPRT0381AJFJ Apply grease Apply grease Apply grease LANGF9592AJFW Top surface should be free from scratches or soil Drive angle Drive gear R Frame Figure 4 48 ...

Page 31: ...deo heads Check that the mechanism and all electric components are in good working condition prior to the adjustments otherwise adjustments can not be completed Instruments required Color TV monitor Dual trace oscilloscope Audio signal generator AC milli voltmeter Blank video cassette tape Alignment tape VROEFZCS Screwdriver for adjustment Color bar generator RF signal generator P201 TP201 204 R72...

Page 32: ... circuit between TP802 on the main PWB and pressbothCHbutton andCHbutton atsametime 3 Press the tracking buttons and 20 times each to bring the tracking off center Make sure that 1 There is nothing unusual on the playback screen 2 There is nothing unusual in the Hi Fi sound for the Hi Fi models only 4 Cancel the short circuit Note Self recorded tape is a cassette whose program was re corded by the...

Page 33: ...io signal to 3kHz and the modulation factor to 30 Left channel only and adjust R144 SEPARA TION ADJ so that the right channel output becomes minimized 4 Repeat step 5 4 ADJUSTMENT OF SIF INPUT LEVEL until obtain a specification INITIAL JUMPER SETTING METHOD Effected Model Model With VCR Plus and VCR Plus C3 and G CODE 1 E2PROM Jumper Setting 1 Set the VCR in standby mode Power Off 2 Short circuit ...

Page 34: ... direction and master cam counterclockwise CASSETTE INSERTION STOP Cassette inserting Full loading YES YES YES NO NO NO Unloading Loading motor starts in normal direction and master cam counter clockwise Does mechanism position sw come off within 2 5 sec Are start end sensors at low level before cassette insertion Insert cassette Double action rack slides Drum motor starts Tape loading Pinch rolle...

Page 35: ...otor stops End Stop capstan motor NO YES Press STILL key Pinch roller releasing Idler swinging Pinch roller pressing Loading motor turns clockwise and master cam counterclockwise Turn capstan motor in reverse direction Turn loading motor counterclockwise Cam switch is at VSR position Set capstan motor to search speed Is take up reel sensor signal outputted Press REW key Release pinch roller Cam sw...

Page 36: ... motor Loading motor stops End Loading motor turns in clockwise and master cam counterclockwise 4 supply reel pulses outputted Does the take up reel pulse output two edges Capstan motor turns clockwise Loading motor turns clockwise Cam switch is at Eject position Loading motor stops Capstan motor stops Press EJECT key Tape unloading Cassette eject End Capstan motor turns clockwise Capstan motor tu...

Page 37: ...upply system in trouble Does capstan motor turn in FF or REW direction Are idler wheel ass y and reel disk in mesh Is the pulse outputted from reel sensor The cassette tape is presumably damaged 2 REC PLAY FAILURE MODE RELEASE NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Is the master cam at PB position Does loading motor operate Modes changing smoothly through cam switch Loading motor con...

Page 38: ...upply reel disk in mesh Is supply reel disk winding torque normal Is pulse outputted from reel sensor Check main PWB YES YES YES YES YES NO NO NO NO NO YES YES NO NO YES Press REW key 4 i Unusual sound in cassette insertion and ejection mode Is unusal sound heard during cassette control running Unusual sound heard with pinch roller lever going up or down Is unusual sound heard during loading unloa...

Page 39: ...ust gap found at reel disk Drive system out of contact with any part on main PWB Turn capstan motor by hand Unusual sound heard Check drive system s gears for damage Replace damaged gear with new one Reel disk Limiter pulley ass y Idler wheel ass y Check reel disk and main chassis And replace defective parts Adjust reel disk height Rearrange the parts on main PWB ...

Page 40: ...e 1 Case 2 Check for leak or short circuiting of primary circuit part L901 D901 904 T901 C906 R904 Q901 902 etc Check for short circuiting of rectifying diode and circuit in each rectifying circuit of secondary circuit D921 928 FLOW CHART NO 4 When buzz is heard from the vicinity of power circuit Check for short circuiting of circuit and rectifying diode of each rectifying circuit of secondary cir...

Page 41: ...nsor shutter go to open when the cassette tape is inserted NO NO NO FLOW CHART NO 9 A cassette tape is taken in but ejected at once Does the start sensor pulse at pin 79 of IC701 change from L to H level when the cassette tape is loaded Check start sensor and all the way up thru to IC701 Does the end sensor pulse at pin 85 of IC701 change from L to H level when the cassette tape is loaded Check en...

Page 42: ... NO NO NO NO NO NO YES YES YES NO NO NO FLOW CHART NO 11 No power is turned on Does power control H signal at pin 4 of IC701 change from L to H level Check IC701 Does the base of Q951 change from about 5 0V to 4 5V Check IC701 and all the way up thru to Q951 Is 5V sent out of the collector of Q951 Check Q951 and the AT 5V line Check peripheral circuits for poor soldering FLOW CHART NO 12 The capst...

Page 43: ... the drum motor rotating Is the drum PG signal and drum FG signal present on pins 66 and 65 of IC701 respectively Are there drum PG M M signal at pin 81 of IC701 Check C723 and readjust R724 HEAD SW POINT control Could be lines between IC706 and IC701 Check periperal circuit of IC706 Are the drum PG and drum FG signals present on pins 7 and 8 of IC706 Replace IC701 Check or replace drum motor Chec...

Page 44: ... Check peripheral circuit of pin 50 of IC701 C770 C771 and R770 Check drum FG signal line Is the head switching pulse at pin 23 of IC701 present NO See FLOW CHART NO 15 YES YES Is the drum APC output at pin 34 of IC701 and drum AFC output at pin 32 of IC701 present NO Replace IC701 YES YES Is the drum control voltage applied to pin 2 of IC706 YES Is pin 46 of IC701 in high impedance NO YES NO Chec...

Page 45: ...d 33 of IC701 Replace IC701 Replace A C head YES YES YES NO NO NO Is there capstan AFC signal at pin 31 of IC701 NO NO NO Is there capstan APC signal at pin 33 of IC701 YES NO Replace IC701 Does PB CTL signal appear at pin 76 of IC701 Replace IC701 Is there REC CTL signal output at pins 75 and 74 of IC701 Does PB CTL signal appear at pin 76 of IC701 Does A C head operate normally Adjust the height...

Page 46: ...o the pin 49 of IC701 Is picture signal output to the pin 47 of IC701 Check the line between pin 52 of IC201 and pin 49 of IC701 Check the line between pins 63 and 62 of IC201 and pins 56 and 57 of IC701 Is picture signal output to the emitter of video output buffer Q251 1 Line output Check Q251 periphery and output terminal periphery 2 RF output Check Q251 periphery and tuner pin 6 periphery Is 5...

Page 47: ... 26 of IC201 Check C212 Check between the pins 24 and 23 of IC201 Check C210 Is voltage 5V applied to the CCD section power terminal pin 36 of IC201 Is CCD control voltage approx 5V applied normally to the pin 37 from the pin 57 of IC201 Is clock signal approx 7 16 MHz 0 5 Vp p for CCD applied normally to the pin 44 from the pin 69 of IC201 Check the pins 13 and 14 of IC201 peripheral circuit R201...

Page 48: ...of IC201 Is luminance signal approx 0 5 Vp p input to the pin 39 of IC201 Check between the pin 39 and pin 26 of IC201 Check C212 Check between the pin 21 and pin 42 of IC201 Check C208 Check between the pin 18 and pin 19 of IC201 Check C206 Check between the pin 55 and pin 54 of IC201 Check C514 Check between the pins 79 and 78 of IC201 Is the luminance signal approx 0 25 Vp p input and output to...

Page 49: ...pins 53 and 57 of IC651 RF output terminal Is there audio signal outputted at pin 59 of IC651 Replace IC651 No Hi Fi E E sound heard pin 48 TP1401 1402 Hi Fi sound cannot be recorded E E mode is normal YES NO YES YES NO NO NO Is record FM signal output to the pins 21 to 24 ch 1 pins 21 and 22 ch 2 of IC651 Check the AH MZ connector Is the pin 29 of IC651 about 3 7V Check line of Hi Fi 5V Check Hi ...

Page 50: ... height adjusted properly Replace the AC head Readjust the A C head height Is audio signal output to the pin 11 of IC201 YES YES YES YES YES YES NO NO NO NO Is it possible to confirm the audio signal PB EQ on the pin 100 of IC201 Replace IC201 Is the pin 99 of IC201 in L level Check the line between the pin 11 of IC201 to the pin 62 of IC651 FLOW CHART NO 27 Check the periphery of pin 99 of IC201 ...

Page 51: ...VC A598U H995U H996U H997U H9977U H998U 51 8 BLOCK DIAGRAM POWER CIRCUIT BLOCK DIAGRAM ...

Page 52: ...VC A598U H995U H996U H997U H9977U H998U 52 SYSTEM SERVO BLOCK DIAGRAM ...

Page 53: ...VC A598U H995U H996U H997U H9977U H998U 53 ...

Page 54: ...VC A598U H995U H996U H997U H9977U H998U 54 SIGNAL FLOW BLOCK DIAGRAM VC A598U ...

Page 55: ...U H995U H996U H997U H9977U H998U 55 E E signal E E signal Audio Audio playback signal Audio recording signal Playback chroma signal Recording chroma signal Playback luminance signal Recording luminance signal ...

Page 56: ...VC A598U H995U H996U H997U H9977U H998U 56 SIGNAL FLOW BLOCK DIAGRAM VC H995U H996U H997U H9977U H998U ...

Page 57: ...U H995U H996U H997U H9977U H998U 57 E E signal E E signal Audio Audio playback signal Audio recording signal Playback chroma signal Recording chroma signal Playback luminance signal Recording luminance signal ...

Page 58: ...he following diagram are measured with an SSVM upon receiving color bars 400 Hz sound signal in either the record mode or the play mode voltage is indi cated as follows 4 0 Record mode SP 4 0 PB mode SP 4 0 LP mode 4 0 EP mode NOTE 1 The unit of resistance ohm is omitted K 1000 ohms M 1 Meg ohm 2 All resistors are 1 8 watt unless otherwise noted 3 All capacitors µF unless otherwise noted P µµF Vol...

Page 59: ...U 59 13 12 11 10 9 8 7 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN OPERATION CIRCUIT VC A598U VC H995U VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses 7 6 5 4 3 2 1 A B C D E F G H OPERATION CIRCUIT VC H996U H997U H9977U H998U ...

Page 60: ...VC A598U H995U H996U H997U H9977U H998U 60 7 6 5 4 3 2 1 A B C D E F G H VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 1 ...

Page 61: ...VC A598U H995U H996U H997U H9977U H998U 61 13 12 11 10 9 8 7 ...

Page 62: ...VC A598U H995U H996U H997U H9977U H998U 62 7 6 5 4 3 2 1 A B C D E F G H VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 2 ...

Page 63: ...VC A598U H995U H996U H997U H9977U H998U 63 13 12 11 10 9 8 7 VC H995U H996U H997U H9977U H998U Hi Fi models HI Fi models HI Fi models VC H995U VC H996U VC H997U VC H9977U VC H998U ...

Page 64: ...VC A598U H995U H996U H997U H9977U H998U 64 7 6 5 4 3 2 1 A B C D E F G H VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 3 ...

Page 65: ...VC A598U H995U H996U H997U H9977U H998U 65 13 12 11 10 9 8 7 ...

Page 66: ...VC A598U H995U H996U H997U H9977U H998U 66 7 6 5 4 3 2 1 A B C D E F G H VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 4 VC A598U ...

Page 67: ...VC A598U H995U H996U H997U H9977U H998U 67 13 12 11 10 9 8 7 ...

Page 68: ...VC A598U H995U H996U H997U H9977U H998U 68 7 6 5 4 3 2 1 A B C D E F G H MAIN CIRCUIT 4 VC H995U H996U H997U H9977U H998U VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 69: ...VC A598U H995U H996U H997U H9977U H998U 69 13 12 11 10 9 8 7 ...

Page 70: ... A598U H995U H996U H997U H9977U H998U 70 7 6 5 4 3 2 1 A B C D E F G H VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses BOX CTL CIRCUIT VC H996U H997U H9977U H998U LOCATOR CIRCUIT VC H998U ...

Page 71: ...VC A598U H995U H996U H997U H9977U H998U 71 13 12 11 10 9 8 7 7 6 5 4 3 2 1 A B C D E F G H PWB FOIL PATTERN OPERATION PWB ...

Page 72: ...VC A598U H995U H996U H997U H9977U H998U 72 7 6 5 4 3 2 1 A B C D E F G H MAIN PWB ...

Page 73: ...VC A598U H995U H996U H997U H9977U H998U 73 13 12 11 10 9 8 7 ...

Page 74: ...VC A598U H995U H996U H997U H9977U H998U 74 7 6 5 4 3 2 1 A B C D E F G H BOX CTL PWB VC H996U H997U H9977U H998U LOCATOR PWB VC H998U ...

Page 75: ...LES PIECES DE RECHANGE Pour que votre commande soit rapidement et correctement remplie veuillez fournir les renseignements suivaints 1 NUMERO DU MODELE 2 NO DEREF 3 NO DE PIECE 4 DESCRIPTION DUNTK5464TEV1 Locator Unit VC H998U DUNTK5700TEV8 Main Unit VC A598U DUNTK5700TEVL Main Unit VC H995U DUNTK5700TEVM Main Unit VC H996U H9977U H997U DUNTK5700TEVN Main Unit VC H998U DUNTK5701TEV1 Operation Unit...

Page 76: ...esistor AB Except VC A598U R144 RVR M4343GEZZ J 100k Except VC A598U AB R724 RVR M4343GEZZ J 100k PG MM AB CAPACITORS C101 VCKYCY1HB221K V 220p 50V Ceramic AA C103 VCEA9M0JW107M V 100 6 3V Electrolytic AB C105 VCEA0A0JW108M V 1000 6 3V Electrolytic AC C106 VCKYCY1HF103Z V 0 01 50V Ceramic AA TUNER NOTE THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY TU101 VTUENG56701 1 V Tun...

Page 77: ...ramic AA C310 VCKYCY1HB102K V 1000p 50V Ceramic AA C311 VCKYCY1HF103Z V 0 01 50V Ceramic AA C312 VCKYCY1HF103Z V 0 01 50V Ceramic AA C319 VCCCCY1HH100D V 10p 50V Ceramic AA C320 VCCCCY1HH100D V 10p 50V Ceramic AA C327 VCKYCY1HB102K V 1000p 50V Ceramic AA C329 VCKYCY1HF103Z V 0 01 50V Ceramic AA C351 VCEA9M0JW107M V 100 6 3V Electrolytic AB Except VC A598U C352 VCKYCY0JF105Z V 1 6 3V Ceramic AB Exc...

Page 78: ...100 25V Electrolytic AB C754 VCKYCY1HF103Z V 0 01 50V Ceramic AA C755 VCKYCY1HF473Z V 0 047 50V Ceramic AA C756 VCKYCY1HF473Z V 0 047 50V Ceramic AA C759 VCEA9M0JW226M V 22 6 3V Electrolytic AB C760 VCEA9M0JW107M V 100 6 3V Electrolytic AB C763 VCEA9M0JW476M V 47 6 3V Electrolytic AB C764 VCKYCY1HF103Z V 0 01 50V Ceramic AA C770 VCCCCY1HH101J V 100p 50V Ceramic AA C771 VCE9EM1HW105M V 1 50V Elect ...

Page 79: ...RS CY1JF222J V 2 2k 1 16W Metal Oxide AA VC A598U R616 VRS CY1JF103J V 10k 1 16W Metal Oxide AA VC A598U R617 VRS CY1JF103J V 10k 1 16W Metal Oxide AA Except VC A598U R618 VRS CY1JF563J V 56k 1 16W Metal Oxide AA R619 VRS CY1JF470J V 47 1 16W Metal Oxide AA R620 VRS CY1JF153J V 15k 1 16W Metal Oxide AA R621 VRD RA2EE4R7J V 4 7 1 4W Carbon AA R623 VRS CY1JF393J V 39k 1 16W Metal Oxide AA R624 VRS C...

Page 80: ... R832 VRS CY1JF103J V 10k 1 16W Metal Oxide AA R833 VRS CY1JF103J V 10k 1 16W Metal Oxide AA R834 VRD RA2BE103J V 10k 1 8W Carbon AA Except VC A598U H995U R841 VRD RA2BE822J V 8 2k 1 8W Carbon AA R843 VRD RA2BE474J V 470k 1 8W Carbon AA R845 VRD RA2BE474J V 470k 1 8W Carbon AA R846 VRD RA2BE103J V 10k 1 8W Carbon AA VC A598U H995U R847 VRD RA2BE474J V 470k 1 8W Carbon AA R848 VRD RA2BE474J V 470k ...

Page 81: ...2AJFJ V Loading Double Action AE Spring 31 MSPRT0403AJFJ V Pinch Double Action AD Spring 32 MSPRC0213AJFJ V Earth Spring AC 33 MSPRT0416AJFJ V Tension Spring AD 34 NBLTK0067AJ00 V Reel Belt AE 35 NDAiV1078AJ00 V Reel Disk AE 36 NGERH1293AJZZ V Loading Connect Gear AD 37 NGERH1295AJ00 V Master Cam AE 38 NGERH1294AJZZ V Casecon Drive Gear AD 39 NGERH1270AJZZ V Take Up Loading Gear AF 40 NGERH1271AJZ...

Page 82: ...3005AJFW V Drive Angle Gear AG 317 NSFTD0041AJFD V Main Shaft AH CABINT PARTS FRONT PANEL PARTS 500 CPNLC2524TEV1 V Front Panel Ass y AZ VC A598U 500 CPNLC2527TEV1 V Front Panel Ass y AY VC H995U 500 CPNLC2528TEV1 V Front Panel Ass y AZ VC H996U 500 CPNLC2532TEV1 V Front Panel Ass y AZ VC H9977U 500 CPNLC2531TEV1 V Front Panel Ass y AZ VC H997U 500 CPNLC2529TEV1 V Front Panel Ass y AZ VC H998U 500...

Page 83: ...NS 3527AJZZ V Operation Manual AN VC H995U for Canada TINS 3524AJZZ V Operation Manual AL VC H996U H998U TINS 3528AJZZ V Operation Manual AP VC H9977U H997U H998U for Canada RRMCG0237AJSA V Infrared Remote Control AZ Unit VC A598U H995U H996U RRMCG0263AJSA V Infrared Remote Control BC Unit VC H9977U H997U RRMCG1165AJSA V Infrared Remote Control BG Unit VC H998U ACCESSORIES Not Replacement Item TCA...

Page 84: ... EXPLODED VIEW MECHANISM CHASSIS EXPLODED VIEW 31 12 20 18 214 19 29 49 51 8 11 203 49 51 7 58 52 4 25 24 2 33 15 1 50 218 207 67 207 53 216 41 61 21 38 17 208 60 47 44 6 30 36 9 39 45 219 10 30 40 27 43 46 43 35 35 37 34 23 48 209 210 211 212 213 223 5 26 68 69 55 16 202 222 221 201 202 202 220 59 70 57 71 56 32 22 63 62 66 66 66 66 65 62 ...

Page 85: ...tion Code Ref No Part No Description Code VC A598U H995U H996U H997U H9977U H998U 7 6 5 4 3 2 1 A B C D E F G H CASSETTE HOUSING CONTROL EXPLODED VIEW 301 304 311 311 305 306 309 303 312 316 315 307 314 310 317 313 302 308 300 ...

Page 86: ...No Description Code VC A598U H995U H996U H997U H9977U H998U 7 6 5 4 3 2 1 A B C D E F G H MECHANICAL EXPLODED VIEW A 611 B C C B 600 609 615 602 612 605 604 603 607 608 610 614 606 601 615 609 613 A 605 609 VC A598U H995U VC H996U H997U H9977U H998U ...

Page 87: ...re that the cassette cover open le ver is between the front panel and the cassette cover Now fix the front panel in place Before attaching the front panel in position make surethatthecassettecover open lever is in its right place lower most If it is outofposition pushitdown with a finger Cassette cover Cassette cover open lever Cassette housing Cassette cover open lever Cassette cover open lever C...

Page 88: ...ssette over about 45 open and make sure that the cassette cover open le ver is between the front panel and the cassette cover Now fix the front panel in place Before attaching the front panel in position make surethatthecassettecover open lever is in its right place lower most If it is outofposition pushitdown with a finger Cassette cover Cassette cover open lever Cassette housing Cassette cover o...

Page 89: ...only TCADH3051AJZZ Timer Card VC A598U H995U U S A TCADH3052AJZZ Timer Card VC H996U H998U U S A TCADH3053AJZZ Timer Card VC H995U Canada TCADH3054AJZZ Timer Card VC H997U H9977U H998U Canada MARK Not Replacement Item Dry Battery TLABK0005AJZZ No Label QCNW 0322AJZZ 75 ohm Coaxial Cable RRMCG1165AJSA VC H998U RRMCG0237AJSA VC A598U H995U H996U RRMCG0263AJSA VC H997U H9977U Infrared Remote Control ...

Page 90: ...No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher TQ0617 S Mar 1999 Printed in Japan NA KY SHARP CORPORATION AV Systems Group Quality Reliability Control Center Yaita Tochigi 329 2193 Japan ...

Search results

Summary of Contents for VC-A598U

Reviews:

Related manuals for VC-A598U

Brands by name

Popular brands

Sharp VC-A598U, Service Manual

Search results

Summary of Contents for VC-A598U

Reviews:

Related manuals for VC-A598U

Brands by name

Popular brands