Philips VR407/77 Service Manual Download Page 54

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WF1

WF2

WF3

CN2001

CN2002

Q2051

Q2052-Q2055

T2051

REC

VCA

DET

TRANS

OSC

SYSCON

A.MUTE

A.MUTE(H)

N.REC(H)

REC/PB

N.REC ST(H)

CN1

IC1

J2
REAR OUT

TUNER

MAIN(AUDIO)

TU AUDIO

AUDIO

(VIDEO/N.AUDIO SIGNAL PROCESSOR)

FILTER

POWER

AUDIO

J1
REAR IN

SP ON

PRE AMP

REC ON

EP(LP) ON

FULL ERASE HEAD

F. ERASE

A/C HEAD

A. ERASE

USED

NOT

AUDIO BLOCK DIAGRAM [VR407/77]

4.18

4-34

4-33

Note : For the waveforms in this block diagram, refer to page 4-25.

www.freeservicemanuals.info

Summary of Contents for VR407/77

Page 1: ...AC110V 240V 50 60Hz Power consumption VR407 77 14W VR620 77 VR625 77 16W Operating temperature 41 F 5 C a104 F 40 C Relative humidity 10 to 80 Weight 3 0kg Dimensions VR407 77 360 x 94 x 251mm VR620 77 VR625 77 360 x 94 x 242mm 01A40777 pm5 VR407 77 Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used Publishe...

Page 2: ...5 77 9965 000 07921 ORNAMENT VR620 77 501E 9965 000 07922 DOOR JACK VR620 77 VR625 77 502 9965 000 07923 TOP COVER VR620 77 VR625 77 9965 000 07884 TOPCOVER VR407 77 505 9965 000 07839 DRUM SUB ASSY VR620 77 VR625 77 9965 000 08010 DRUM SUB ASSY VR407 77 505E 4822 265 11367 CONTACT 505F 4822 492 11671 COMPRESSIONSPRING 506 4822 362 10293 ROTOR ASSY 508 9965 000 08089 STATOR ASSY 512 9965 000 08090...

Page 3: ...BRAKE ASSY SUPPLY 80 9965 000 03712 MAIN BRAKE ASSY TAKE UP 81 9965 000 03713 TENSIONSPRING 82 9965 000 00852 SUB BRAKE ASSY TAKE UP 83 4822 492 11633 TENSIONSPRING 84 4822 535 10644 CAPSTAN BRAKE ASSY 85 9965 000 07894 CAPSTANMOTOR 87 4822 358 10274 BELT CAPSTANMOTOR 88 9965 000 07895 IDLER ARM ASSY 89 9965 000 07896 WASHER 90 9965 000 03715 CLUTCHUNIT3 91 9965 000 07897 SPACER CAPSTANMOTOR 92 48...

Page 4: ...S IC1 9965 000 04581 JCP8021 MVD IC2201 9965 000 07817 AN3663FBP IC3001 9965 000 08688 MN101D02GWG IC3002 9965 000 03719 BA6956AN IC3003 9965 000 07819 S 80823ANNP W IC3004 9965 000 07728 AT24C32N 10SC X 9965 000 07582 IC VR407 77 IC5301 9965 000 02082 L5431 IC7002 4822 130 10959 GP1U290Q IC7042 4822 130 10959 GP1U290Q TRANSISTORS Q1 9965 000 00463 2SC4081 S X Q2 9965 000 00463 2SC4081 S X Q3 9965...

Page 5: ...033 MG RES VR407 77 10kΩ 1 10W R6050 IM BUS W R6054 MG RES 1kΩ 1 10W R6502 MG RES VR620 77 VR625 77 3 3KΩ 1 10W R6503 MR RES VR620 77 VR625 77 15KΩ 1 10W R6504 MG RES VR620 77 VR625 77 10KΩ 1 10W R7001 RES 330Ω 1 4W R2058 MG RES 18kΩ 1 10W R2059 MG RES 47kΩ 1 10W R2060 MG RES 18kΩ 1 10W R2201 MG RES VR620 77 VR625 77 47KΩ 1 10W R2202 MG RES VR620 77 VR6225 77 6 8KΩ 1 10W R2203 MG RES VR620 77 VR62...

Page 6: ...V C2216 E CAP VR620 77 VR625 77 47µF 16V C2218 E CAP VR620 77 VR625 77 10µF 25V C2219 E CAP VR620 77 VR625 77 22µF 16V R7002 MG RES 330Ω 1 10W R7003 MG RES 330Ω 1 10W R7004 MG RES 330Ω 1 10W R7005 MG RES 330Ω 1 16W R7006 MG RES 330Ω 1 10W R7007 MG RES 330Ω 1 16W R7015 RES VR620 77 VR625 77 100KΩ 1 4W R7020 MG RES 10kΩ 1 10W R7021 MG RES 1 2kΩ 1 10W R7022 MG RES 1 8kΩ 1 10W R7023 MG RES 2 2kΩ 1 10W...

Page 7: ...4822 242 11048 CRYSTALRESONATOR X3002 4822 242 10939 CRYSTALRESONATOR C2220 E CAP VR620 77 VR625 77 10µF 25V C2221 CAP VR620 77 VR625 77 0 022µF 25V C2222 CAP VR620 77 VR625 77 0 01µF 25V C2251 CAP VR620 77 VR625 77 0 01µF 50V C2252 CAP VR620 77 VR625 77 0 01µF 25V C2253 CAP VR620 77 VR625 77 0 01µF 25V C2254 E CAP VR620 77 VR625 77 47µF 6 3V C2255 CAP VR620 77 VR625 77 0 01µF 25V C2256 CAP VR620 ...

Page 8: ...07 77 9965 000 07925 PIN JACK A V IN VR620 77 VR625 77 J2 4822 265 11632 PIN JACK A V OUT VR620 625 77 9965 000 00324 PIN JACK A V OUT VR407 77 FW7106 9965 000 08686 PARA RIBON W VR620 VR625 77 J7101 9965 000 07926 PIN JACK FRONT IN VR620 77 VR625 77 FILTER VARISTOR LF5002 4822 157 11291 LINEFILTER VA5003 4822 117 13663 VARISTOR CONNECTORS CN1 4822 264 10399 FPCCONN 1 11 U DRUM VR620 77 VR625 77 4...

Page 9: ...r opener a of the Cassette holder assembly is low ered in position prior to the reinstallation Note 2b When reattaching the Front panel assembly pay careful at tention to the switch lever not to make it touch the switch knob b of the Main board assembly from the side Note 3a Be careful not to damage the connector and wire etc during connection and disconnection When connecting the wire to the conn...

Page 10: ...VR625 77 L2a VR620 77 VR625 77 S3b 3 Drum assembly CN1 CON1 WR3a Note 3a L3a L3b P3 Roller arm assy Inertia plate L3a WR3b Note 3a Cleaner assy Not used S3a S3c Note When installing the Drum assembly secure the screws S3a to S3c in the order of a b c Turn the loading motor pulley in the direction as indicated by Fig 2 As both A and B levers are lodged twice push the levers in the direction as indi...

Page 11: ...sembly S5a L5a VR407 77 4 Mechanism assembly CN2001 Q3002 End sensor Note 4a Q3001 Start sensor VR620 77 VR625 77 Note 4a WR4a Note 3a S4b Note 4a S4a Note 4a S4c S4c D3001 LED Note 4a Note When installing the Mechanism assembly secure the screws S4a to S4b in the order of a b Fig D8 6 Bottom cover L6b L6b L6a Note 6a www freeservicemanuals info ...

Page 12: ...e re quired mode before placing it upside down If the mechanism mode is changed including ejection while it is in an upside down position the tape inside may be damaged The mechanism and board assemblies of this unit are attached by connectors only When carrying out a diagnosis or repair of the boards in the Service position make sure that the connec tors are not disconnected 1 5 Mechanism service...

Page 13: ...from the Jig RCU 3 Reset the EMG display Example 1 E 01 03 Previous EMG Latest EMG No EMG record Example 2 E 1 7 1 Displaying the EMG information 1 Transmit the code 59 from the Jig RCU The FDP shows the EMG content in the form of E INITIAL MODE DATA CODE CUSTOM CODE 43 A CODE 53 B CODE Data transmitting method Depress the 3 button after the data code is set Jig RCU Notes The EMG detail informatio...

Page 14: ...ncreases during ejection the loading motor is stopped because of lack of headroom in its drive torque Housing load increasing factors Temperature environment low tempera ture etc mechanism wear or failure 3 The sensor switch for detecting the end of ejection are not functioning normally 4 The loading motor drive voltage is lower than specified or power is not sup plied to the motor MDA 5 When the ...

Page 15: ...peed reverse playback using JOG CD AUDIO DUB PAUSE EF INSERT REC VIDEO AUDIO PAUSE F0 Mechanism being initialized F1 POWER OFF as a result of EMG F2 Cassette being inserted F3 Cassette being ejected F4 Transition from STOP with pinch roller pressure on to STOP with pinch roller pressure off F5 Transition from STOP with pinch roller pressure on to PLAY F6 Transition from STOP with pinch roller pres...

Page 16: ...tape TC 10 09 15 C cassette thick tape TC 20P 0A 0B Small reel thick tape T 20 0A 16 C cassette thin tape TC 30 0A 16 C cassette thin tape TC 40 0D 0F Small reel thick tape T 40 11 14 Small reel thick tape T 60 15 18 Small reel thick tape T 80 DF 160 17 1A Small reel thick tape T 90 DF 180 19 1D Small reel thick tape T 100 1D 21 Small reel thick tape T 120 DF 240 1E 1F Small reel thin tape T 140 1...

Page 17: ...e cause of any electrical failure manually remove it by taking the following steps 1 Unplug the power cord plug from the power outlet 2 Refer to the disassembly procedure and perform the dis assembly of the major parts before removing the drum assembly 3 Unload the pole base assembly by manually turning the loading motor of the mechanism assembly toward the front In doing so hold the tape by the h...

Page 18: ...he tape See Fig 2 1 3d 4 In the same way as in the electrical failure instructions in 2 1 3 1 5 remove the top guide 5 Raise the cassette tape cover By keeping it in that posi tion draw out the cassette tape case from the cassette holder and take out the tape 6 By hanging the pinch roller arm assembly spring back on the hook take up the slack of the tape into the cas sette Fig 2 1 3d Fig 2 1 3c Po...

Page 19: ...assembly Lid guide Guide arm assembly Reel disk take up side Sub brake assembly take up side Main brake assembly take up side Idler arm assembly Idler lever Main brake assembly supply side Reel disk supply side Rec safety lever Tension brake assembly Adjust pin Tension arm assembly Pole base assembly supply side Full erase head Pole base assembly take up side T1 T26 T25 T24 T23 T22 T2 T3 T5 T7 T8 ...

Page 20: ... cause damage to the video head 2 To clean the parts of the tape transport system other than the upper drum use a piece of closely woven cloth or a cotton swab soaked with alcohol 3 After cleaning make sure that the cleaned parts are com pletely dry before using the video tape 3 Lubrication With no need for periodical lubrication you have only to lu bricate new parts after replacement If any oil o...

Page 21: ... 2 2 11 Clutch unit B 1 2 2 12 Change lever assembly B 3 2 2 12 Direct gear B 4 2 2 12 Coupling gear B 5 2 2 12 Clutch gear B 6 2 2 13 Link lever B 1 2 2 14 Cassette gear B 2 2 2 14 Control cam B 2 2 2 14 Worm gear B 1 Lid guide T B 5 2 2 15Control bracket1 B 1 2 2 15Control plate B 6 2 2 16Loading arm gear supply side B 7 2 2 16Loadingarmgear take upside B 8 2 2 16Loading arm gear shaft B 9 2 2 1...

Page 22: ...onse to phases of the rotary encoder internal switch positions the mechanism may not operate properly unless such parts as the rotary encoder control plate loading arm gear control cam cassette gear limit gear relay gear and drive gear are installed in their correct posi tions Especially this model is not provided with any cassette hous ing assembly so that cassette loading and unloading must be a...

Page 23: ...ove See Fig 2 2 3g 4 While swinging the lock lever R of the cassette holder assembly toward the front put the legs A and B into the rail See Fig 2 2 3g 5 Drop the three legs on the left side of the cassette holder assembly into the groove at one time See Fig 2 2 3h 6 Slide the whole cassette holder assembly toward the front to bring it to the eject end position 7 Install the limit gear so that the...

Page 24: ... the A C head remove the three screws B while controlling the compression spring Fig 2 2 6a Fig 2 2 6c Fig 2 2 4a 2 2 5 Guide arm assembly and press lever assembly 1 How to remove 1 Remove the spring and expand the lug of the lid guide in the arrow indicated direction Then remove the guide arm assembly by pulling it up 2 Remove the press lever assembly by pulling it up See Fig 2 2 5a Tension sprin...

Page 25: ...ctly in stalled as indicated in Fig 2 2 8b 3 Making sure that the connector for the capstan motor is correctly mounted and securely tighten the three screws A Note When the capstan motor has been replaced with a new one perform recording in the EP or LP mode for at least 2 minutes at normal temperatures immediately be fore starting the FF REW or SEARCH operations Ag ing Spacer Spacer Connector for...

Page 26: ...oder guide in the arrow indicated direction and remove the change lever assembly 2 Remove the slit washer retaining the direct gear and re move the latter Take care so as not to lose the washer and spring See Fig 2 2 12a 2 2 10 Rotary encoder 1 How to remove 1 Remove the screw A and remove the rotary encoder by pulling it up See Fig 2 2 10a Fig 2 2 10a Rotary encoder Front side Screw A Rotary enco...

Page 27: ...y encoder guide Mark E Fig 2 2 13c Worm gear Control cam Main deck guide hole Control cam guide hole Cassette gear 2 2 14 Cassette gear control cam and worm gear 1 How to remove 1 Remove the control cam by lifting it 2 Open the two lugs of the cassette gear outward and pull the latter off 3 Remove the belt wound around the worm gear and the loading motor 4 Open the lug of the lid guide outward and...

Page 28: ...ction D Section D Section A Hole A 3 Install the control plate so that the section A of the load ing arm gear shaft fits into the hole A of the control plate the section B of the control plate guide into the hole B and the control plate comes under the section C of the rotary encoder guide and the section D of the loading arm gear shaft while press fit the pole base assmebly sup ply side as indica...

Page 29: ...Remove the lugs B and C of the sub brake assembly take up side from the main deck and remove the sub brake assembly take up side Fig 2 2 19a Spring Sub brake assembly take up side Lug B Lug A Lug C Fig 2 2 20a Lug D Lug C Spring Lug E Lug A Lug B Main brake assembly take up side Reel disk take up side Main brake assembly supply side Notch 2 2 20 Main brake assembly take up side reel disk take up s...

Page 30: ...eel disk supply side by loosening in the arrow indicated direction the main brake assembly sup ply side 3 Remove the tension spring on the back of the main deck Then release the lug of the tension arm bearing in the arrow indicated direction and draw out the tension arm assembly See Fig 2 2 21a Fig 2 2 21a Lugs Tension brake assembly Lug of the tension arm bearing Reel disk supply side Tension arm...

Page 31: ...sher and upper drum assembly on the drum shaft See Fig 2 2 25a 3 Install the cap to the upper drum assembly 4 Position the collar assembly as indicated in Fig 2 2 25c while controlling its up down movement 5 Secure the collar assembly in position with a hexagonal wrench while pressing its top with the fingers 6 After installation gently turn the upper drum assembly with your hand to make sure that...

Page 32: ...ee Fig 2 3 1a 5 Reduce the V PB FM waveform by the tracking opera tion If a drop in level is found on the left side turn the guide roller of the pole base assembly supply side with the roller driver to make the V PB FM waveform linear If a drop in level is on the right side likewise turn the guide roller of the pole base assembly take up side with the roller driver to make it linear See Fig 2 3 1c...

Page 33: ... point D TP106 PB FM External trigger E TP111 D FF Adjustment part F A C head base Mechanism assembly Specified value G Maximum V PB FM waveform Adjustment tool H A C head positioning tool 1 Play back the alignment tape A1 2 Apply the external trigger signal to D FF E to observe the V PB FM waveform at the measuring point D 3 Set the VCR to the manual tracking mode 4 Loosen the screws 4 and 5 then...

Page 34: ... TP106 PB FM External trigger E TP111 D FF Adjustment part F Jig RCU Code 50 Specified value G STOP mode Maximum V PB FM waveform Adjustment tool H Jig RCU 2 3 5 Tension pole position 1 Play back the back tension cassette gauge A 2 Check that the indicated value on the left side gauge is within the specified value G 3 If the indicated value is not within the specified value G perform the adjustmen...

Page 35: ...5 IN FF REW OUT PLAY Direct gear Change lever 2 ON HALF REV HALF FF REW OFF Tension arm ON CONTACT OFF Main brake S ON CONTACT OFF Main brake T ON OFF Sub brake S ON OFF Sub brake T ON OFF OFF ON Capstan brake ON OFF Rec safety switch Operation mode ON PLAY ON REV CONTACT OFF C INS Pinch roller SUPPLY CENTER TAKE UP Idler position READY RESET Take up lever ON OFF Guide arm Timer REC standby Backsp...

Page 36: ...de the mode in which codes from the Jig RCU can be received See SECTION 1 DIS ASSEMBLY Set the switches as shown below unless otherwise specified on the relevant adjustment chart The switches that are not listed below can be set as desired If the VCR is not equipped with the functions detailed below setup is not required If there is a reference to a signal input methed in the signal column of the ...

Page 37: ...tape A2 2 Apply the external trigger signal to D FF E to observe the VIDEO OUT waveform and V PB FM waveform at the measuring points D1 and D2 3 Set the VCR to the manual tracking mode 4 Adjust tracking so that the V PB FM waveform becomes maximum 5 Set the VCR to the Auto adjust mode by transmitting the code F from the Jig RCU When the VCR enters the stop mode the adjustment is completed 6 If the...

Page 38: ...our bar SP mode normal VHS mode 2 Audio circuits REC 1KHz 8 dBs sine wave signal in SP mode normal VHS mode PB REC then playback it 3 Movie Camera circuits Measured using a correctly illuminated gray scale or colour bar test chatrs in the E E mode 4 Indication on schematic diagram Waveform indications on the schematic diagram are as shown below 5 Waveform indications Waveform number WF25 REC PB 1 ...

Page 39: ...de A Component side C Chip component D Discrete component 6 Signal path Symbols The arrows indicate the signal path as follows Playback signal path Playback and recording signal path Recording signal path including E E signal path Capstan servo path Drum servo path Example R Y Y Playback R Y signal path Recording Y signal path 7 Indication of the parts for adjustments The parts for the adjustments...

Page 40: ...DEO AUDIO p10335001a rev0 Page 4 17 Page 4 17 TERMINAL Page 4 16 OPEN ONLY USED FOR VR620 77 VR625 77 ONLY USED FOR VR620 77 VR625 77 Page 4 5 Page 4 7 Page 4 9 Page 4 11 Page 4 13 Page 4 15 Page 4 19 ONLY USED FOR VR620 77 VR625 77 ONLY USED FOR VR620 77 VR625 77 ONLY USED FOR VR620 77 VR625 77 OPEN www freeservicemanuals info ...

Page 41: ...CN1 The Parts Number value and rated voltage etc in the Schematic Diagram are for references only When replacing the parts refer to the Parts List Note 0 Not used Used TO SYSCON TO SYSCON NC TO FULL ERASE HEAD TO SYSCON FMA DEMOD MAIN VIDEO AUDIO SCHEMATIC DIAGRAM ONLY USED FOR VR620 77 VR625 77 OPEN OPEN www freeservicemanuals info ...

Page 42: ...ONT TO TUNER TO FMA DEMOD TO TUNER TO TUNER FMA DEMOD TO TUNER TO FMA DEMOD OPEN TO TERMINAL TO VIDEO AUDIO TO TERMINAL TO VIDEO AUDIO TO VIDEO AUDIO p10334001a rev0 OUT2 Vre5 Vs OUT1 GND GND IN1 Vcc IN2 OPEN OPEN MAIN SYSCON SCHEMATIC DIAGRAM S 80823ANNP AT24C32N 10SC AT24C04N 10SC OPEN NC 0 VR620 77 VR625 77 MN101D02GWG ONLY USED FOR VR620 77 VR625 77 TO LITHIUM BATTERY FW7106 VR407 77 www frees...

Page 43: ... refer to the Parts List Note DANGEROUS VOLTAGE GROUND POINT FOR PRIMARY VOLTAGE GROUND POINT FOR TO SYSCON TO TUNER TO SYSCON TO TUNER TO SYSCON TO VIDEO AUDIO SYSCON TUNER TERMINAL FMA DEMOD TO VIDEO AUDIO SYSCON TUNER FMA DEMOD TO SYSCON TO VIDEO AUDIO SYSCON TUNER SECONDARY VOLTAGE MAIN SW REG SCHEMATIC DIAGRAM FMA DEMOD TERMINAL QQR0532 001 www freeservicemanuals info ...

Page 44: ... value and rated voltage etc in the Schematic Diagram are for references only When replacing the parts refer to the Parts List Note Not used Used TO VIDEO AUDIO TO VIDEO AUDIO FMA DEMOD TO VIDEO AUDIO TO TERMINAL p10337001a rev0 TO FMA DEMOD SHORT SEPARATION 2 MAIN TUNER SCHEMATIC DIAGRAM www freeservicemanuals info ...

Page 45: ...am are for references only When replacing the parts refer to the Parts List Note Not used Used TO SW REG TO TUNER TO VIDEO AUDIO TO SYSCON TO VIDEO AUDIO TERMINAL TO SYSCON TO VIDEO AUDIO TO TUNER SYSCON p20199001a rev0 TO SYSCON MAIN FMA DEMOD SCHEMATIC DIAGRAM VR620 77 VR625 77 www freeservicemanuals info ...

Page 46: ...gram are for references only When replacing the parts refer to the Parts List Note Not used Used p20203001a rev0 OPEN OPEN J5 V UP H TO MINI FRONT CN7001 CN7002 TO FRONT MAIN FRONT AND MINI FRONT SCHEMATIC DIAGRAMS ONLY USED FOR ONLY USED FOR VR620 77 VR625 77 VR620 77 VR625 77 www freeservicemanuals info ...

Page 47: ...am are for references only When replacing the parts refer to the Parts List Note p30084001a rev0 Not used Used TO SYSCON FW3001 H G F E D C B A 4 5 3 2 1 LITHIUM BATTERY SCHEMATIC DIAGRAM VR620 77 VR625 77 4 8 4 18 OPEN TO SYSCON CN3007 4 17 www freeservicemanuals info ...

Page 48: ...er to the Parts List Note Not used Used TO SW REG TO SYSCON TO FMA DEMOD TO SYSCON Delete a short pin Delete a short pin OPEN p40036001a rev1 ONLY USED FOR 1 2 3 5 4 A B C D MAIN TERMINAL SCHEMATIC DIAGRAM 4 9 VR620 77 VR625 77 ONLY USED FOR VR620 77 VR625 77 VR620 77 VR625 77 ONLY USED FOR 4 19 www freeservicemanuals info ...

Page 49: ... Q2203 B C 18L Q2204 B C 18L Q2251 B C 14N Q2252 B C 14L Q2253 B C 15M Q3001 A D 4I Q3002 A D 19I Q3003 B C 6M Q3004 B C 5C Q3005 B C 16C Q3006 B C 13E Q3007 B C 14E Q4001 B C 16D Q4002 B C 7D Q5101 A D 2J Q5102 A D 3K Q5301 A D 3F Q5302 A D 1E Q5303 B C 2E Q5304 A D 2E Q5305 B C 3E Q5306 B C 5E Q5307 A D 21E Q5308 B C 4G Q5311 B C 4E Q5321 A D 1E Q6030 B C 21G Q6031 B C 21G Q6501 B C 16L Q6502 B ...

Page 50: ... 8 1 REW LPA10130 01A5 LED PWB A SSY E B 1 4 2 1 1 3 1 2 R P C BOX 16 1 3 9 9 LPA10130 01A2 3 3 C BOX CTL R PAUSE PWB ASS Y STOP 49 1 2 9 3 TION 1 SEPARA 9 8 1 2 6 1 1 5 100 8 5 12 5 3 1 B E E B TIMER 80 1 REC CASS POWER V1 T5001 C5006 C5101 C5102 C5103 C5105 C5106 C5107 C5202 C5203 C5204 C5207 C5302 C5305 C5306 CP5302 D5001 D5102 D5105 D5210 IC5301 K5101 K5102 LF5001 Q5101 Q5102 Q5302 Q5303 Q5304...

Page 51: ...CTION K6 K3 K5 K2 K4 K1 I J D C B A 4 5 3 2 1 4 23 4 24 REMOTE CONTROLLER SCHEMATIC DIAGRAMS 4 11 FDP GRID ASSIGNMENT AND ANODE CONNECTION 4 12 SMART PICTURE AUDIO MUTE LP20703 009 P52 P53 P60 P61 P62 P63 KEY LED P11 NC RMO TEST VDD Xin Xout VSS RESET P51 P50 P43 P42 P41 P40 P03 P02 P01 NC P00 NC P73 NC P72 NC P71 NC P70 SPEED ALT CLEAR FF PLUS PLAY MENU UP REW MINUS VCR TV CBL DSS STOP MENU DOWN ...

Page 52: ... CTL HEAD CTL CTL HEAD A C HEAD A C CN3001 CON1 CN3002 CN3003 IC3002 IN 1 IN 2 4 5 I2C DATA A V I2C CLK A V VIDEO AUDIO TO 17 18 23 24 82 50 49 47 I2C DATA A V I2C CLK A V VIDEO OSD OUT D FF V TO OSD 76 75 74 62 63 61 12 11 99 Q3003 1 2 94 33 68 34 66 65 CAP CTL V C FG IN DRUM CTL V D PG IN D FG IN 64 84 Q3002 25 RESET AL5 8V SYS 56 57 I2C DATA I2C CLK I2C DATA I2C CLK TEST IC3004 SERIAL MEMORY 35...

Page 53: ... Det ALC LPF Main LPF ET Sub P R De Emph Y LPF P R ET ET FBC ALC SQPB EQ SQPB D E N C YNR SQPB Clamp P DO REC DO R P R DeMOD EQ 8 7 TER FIL 13 6 12 14 Gen 0 3 BUF Q22 30 C K 27 29 N P B D B E AMP 6dB AMP 6dB C SQUELCH SQUELCH 26 BUF Q901 Fsc SYSCON TO TO TUNER INT EXT C K L SECAM SYNC CLEAR Sync Sep WHITE LIMITER L SECAM MIX ADJ LEVEL 25 21 Clamp CTL ideo P R ATT 10dB ATT 10dB ATT 10dB V AGC APT Y...

Page 54: ...98 99 CN1 IC1 J2 REAR OUT 4 1 2 1 TUNER MAIN AUDIO TO TU AUDIO AUDIO VIDEO N AUDIO SIGNAL PROCESSOR FILTER FILTER POWER TO AUDIO 1 4 J1 REAR IN SP ON PRE AMP REC ON EP LP ON FULL ERASE HEAD F ERASE A C HEAD A ERASE USED NOT 1 2 3 5 4 A B C D E F G H AUDIO BLOCK DIAGRAM VR407 77 4 18 4 34 4 33 Note For the waveforms in this block diagram refer to page 4 25 www freeservicemanuals info ...

Page 55: ...E OUT R 57 LINE OUT L FMA CH1 AUDIO HEAD U DRUM CN1 9 10 11 9 10 11 12 9 10 11 12 FMA CH2 9 EXT1 IN R 14 EXT1 IN L 22 CH1 21 COM 24 CH2 TUNER COMP TO 48 SIF IN 36 MUTE CTL Q2201 Q2204 MUTE CONTROL I2C CLK I2C D ATA 43 DATA 42 CLK 30 PB FM IN H REC ST H Q2251 Q2252 SW TP2253 A PB FM AUDIO R AUDIO L H G F E D C B A 4 5 3 2 1 MAIN VIDEO AUDIO FMA DEMOD 6 5 4 3 1 UDIO R A AUDIO L J1 REAR1 IN EXT2 IN R...

Page 56: ...ECTION 5 PARTS LIST 5 1 PACKING AND ACCESSORY ASSEMBLY 302 302 310 FINAL ASSY 307 312 309 VR620 77 VR625 77 308 306 306A 318 311 303 SPEC OF BARCODE 301 HANDLING ADHESIVE TAPE www freeservicemanuals info ...

Page 57: ...77 VR407 77 D 537 VR620 77 VR625 77 503 502 503 MAIN BOARD ASSY 03 A 511 SPEC OF BARCODE ET1 Incl 03 ET1 Incl 03 H H H TB1 Incl 03 B C 515 K 516 B WR2 515 MECHANISM ASSY 516 514 513 WR3 C MINI FRONT BOARD ASSY 28 VR620 77 VR625 77 517 518 K 518C 518A 518B 512 530 531 530 504 VR620 77 VR625 77 TB1 Incl 03 LT BATTERY BOARD ASSY 93 532 www freeservicemanuals info ...

Page 58: ... 42 123 AA AA AA AA AA BB AA AA AA AA AA AA AA AA AA AA AA AA BB AA AA AA AA BB 105 120 75 74 121 72 132 76 73 142 88 89 104 135 134 78 107 40 106 49 57 54 59 61 62 1 111 60 83 82 52 58 55 39 53 51 1 112 113 151 116 115 117 118 114 119 66 63 68 67 65 64 70 23 25 24 18 19 20 16 27 71 87 22 99 96 100 31 80 81 34 37 35 103 32 102 36 38 108 109 90 92 AA AA 69 110 15 84 86 13 12 107 26 13 21 5 6 4 11 3...

Page 59: ...TIC DIAGRAM 4 5 4 3 MAIN SYSCON SCHEMATIC DIAGRAM 4 7 4 4 MAIN SW REG SCHEMATIC DIAGRAM 4 9 4 5 MAIN TUNER SCHEMATIC DIAGRAM 4 11 4 6 MAIN FMA DEMOD SCHEMATIC DIAGRAMS VR620 77 VR625 77 4 13 4 7 MAIN FRONT AND MINI FRONT SCHEMATIC DIAGRAMS 4 15 4 8 LITHIUM BATTERY SCHEMATIC DIAGRAM VR620 77 VR625 77 4 17 4 9 MAIN TERMINAL SCHEMATIC DIAGRAM 4 19 4 10 MAIN AND MINI FRONT CIRCUIT BOARDS 4 21 4 11 REM...

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