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Circuit Operating Descriptions

7-33

RF and frequency synthesized tuning system
General description : The receiving circuit consists of both ANT input and output circuits, channel selection cir-
cuit, PIF circuit and SIF circuit. The receiving circuit selects a desired broadcast signal from TV signals induced on
an antenna and sends stable video and audio signals to their respective processing circuits. The output signals
from the video and audio circuits are converted into a conventional TV signal modulated for channel 3 or channel
4 by an RF modulator so that the signal can be received by conventional TV receivers.

(2) Tuner modulator block

As explained, this model is designed in one package to contain a RF MODULATOR BLOCK, TUNER BLOCK
AND IF DEMODULATOR BLOCK. Its size is greatly reduced and other noise interference can be minimized to
make performance high.

Fig. 7-30 Tuner/demodulator Block Diagram

11

3

5

12

21

23

24

ANT INPUT

(MODULATOR SECTION)

(TUNER SECTION)

(IF SECTION)

ANT OUT

Off
through
SW

RF Carrier
OSC

VHF
RF AMP

UHF
RF AMP

UHF
Mixer

VHF
OSC

FM
Detector

SIF
Filter

UHF
OSC

PLL
IC

AGC

AFT

Mixer
IC

SAW
Filter

IF
AMP

Video
Detector

Video
Modulator

FM Modulator

TV SET

AUDIO IN

VIDEO IN

SCL SDA

AUDIO OUT

AFT OUT

VIDEO OUT

2

6

7-7 TM

(1) Outline

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Содержание SV-DVD40

Страница 1: ...and Reassembly 6 Alignment and Adjustment 7 Circuit Operating Description 8 VCR Deck Operating Description 9 Troubleshooting 10 Block Diagram 11 Wiring Diagram 12 Schematic Diagrams Manual DVD VCR COMBINATION CONTENTS TRAINING MANUAL SV DVD50 EJECT STANDBY ON DVD PROG VCR AUX ELECTRONICS Samsung Electronics Co Ltd MAR 2003 Printed in Korea AK82 00330A ...

Страница 2: ...d Ass y Separate the Motor Load Ass y 2 When Slider S T are approach the unloading position rotate holder Clutch counterclockwise after inserting screwdriver in the frame s bottom hole in order to wind the unwound tape Refer to Fig 3 If you rotate Gear Worm Œ continuously when tape is in state of unwinding you may cause tape contamination by grease and tape damage Be sure to wind the unwound tape ...

Страница 3: ...derwriters Laboratories UL 1270 40 7 With the instrument s AC switch first in the ON position and then in the OFF position measure from a known earth ground metal water pipe conduit etc to all exposed metal parts of the instrument antennas handle brackets metal cabinets screw heads metallic overlays control shafts etc espe cially any exposed metal parts that offer an electri cal return path to the...

Страница 4: ...nched out of place or frayed wiring Do not change spacing between a component and the printed circuit board Check the AC power cord for damage 5 Components parts and or wiring that appear to have overheated or that are otherwise damaged should be replaced with components parts and or wiring that meet original specifications Additionally determine the cause of overheating and or damage and if neces...

Страница 5: ...d lead last 2 The service precautions are indicated or printed on the cabinet chassis or components When servic ing follow the printed or indicated service precau tions and service materials 3 The components used in the unit have a specified flame resistance and dielectric strength When replacing components use components which have the same ratings Components ientified by shading by or by in the ...

Страница 6: ...posure of the assem bly 3 Use only a grounded tip soldering iron to solder or unsolder ESD devices 4 Use only an anti static solder removal devices Some solder removal devices not classified as anti static can generate electrical charges suffi cient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a ...

Страница 7: ... sheet This gives them the same ground as the sheet 4 Remove the optical pick up block 5 Perform work on top of the conductive sheet Be careful not to let your clothes or any other static sources to touch the unit Be sure to put on a wrist strap grounded to the sheet Be sure to lay a conductive sheet made of copper etc Which is grounded to the table Fig 1 3 6 Short the short terminal on the PCB wh...

Страница 8: ... Assy 3 Make solder land 2 points short on Pick up See Fig 1 4 4 Disassembly the Pick up 1 5 2 Assembly 1 Replace the Pick up 2 Remove the soldering 2 points on Pick up 3 Reassemble the Deck Assy PICK UP ASS Y SOLDER LAND 2 POINTS SHORT Note If the assembly and disassembly are not done in correct sequence the Pick up may be damaged Fig 1 4 ...

Страница 9: ...Layer Dual Layer Laser Wavelength 650nm 635nm 780nm Track Pitch 0 75um 1 6um Disc Diameter 120mm Disc Thickness 1 2 0 6 x 2 mm 1 2mm Linear Velocity 3 49m s 3 84m s 1 2 1 4m s 2 Disc Formats DVD consists of two 0 6mm discs attached together enabling access to the upper and lower side of the disk and 4 sides could be used at maximum Single Layer 4 7GByte Polycarbonate Label Bondinglayer Reflectivel...

Страница 10: ...nd sound for movies and other video media DVD ROM Read Only Multi functional multi midia software that requires large storage capacity DVD Audio Playback Only High quality sound that exceeds the CD multi channel Audio DVD R 1 Time Recording Storage media for the computer DVD RAM Rewritable Data access storage media for the computer ...

Страница 11: ...ich enables the user to select the scenario 7 Multi Angle Able to view the camera angle you selected among the scenes recorded with multiple camera angles Note The above media features must have the DVD Title that contains the appropriate contents to function properly 2 2 2 Audio Video Specifications Classification DVD Video Video CD LD Compression MPEG 2 MPEG 1 Analog Pixel 720 x 480 352 x 240 VI...

Страница 12: ...Feature 1 When Developing the DVD Software various addition and modification is possible DVD Video uses the variable compresion technology the MPEG 2 to compress the moving image optimally mini mizing the Data loss to Provide a clear natural screen while increasing the storage time DVD Video Feature 2 Application of the MPEG 2 compression technology MPEG 2 Variable compression Max 1 40 Field unit ...

Страница 13: ...conventional Dolby Pro Logic and Stereo are all compatible Each separated channels are played back at CD quality sound Frequency band 20Hz 20KHz Linear PCM Pulse Code Modulation Provides the high quality Digital sound without the audio data compression Various Digital Recordings are possible as shown in the table to the right DVD Video Feature 3 High quality surround audio Sampling Frequency Bit R...

Страница 14: ...lities 16 9 TV Wide Mode 16 9 Wide Full Screen 4 3 TV Letter Box Mode Pan Scan Mode DVD Video Feature 5 Multi Aspect 4 3 Pan Scan 16 9 Wide 4 3 Letter Box Up to 9 angles of view may be stored enabling the viewer to select a specific viewpoint at a given time Especially for the Music Video and Sports Title this provides a more lively image of the scene DVD Video Feature 6 Multi Angle Note Only enab...

Страница 15: ... Classify the world into 6 regions and if the DVD Title and the Player s Reginal Code do not agree playback is prohibited Regionnal Coding is optional for the Soft developers Region 0 All Code but the Hardware developers must adopt the appropriate regionnal code for sale Region 1 The United States and its territories Canada Region 2 Europe Japan Greenland Egypt South Africa the Middle East Region ...

Страница 16: ... as the conventional LD VCD or Original Film Different Authoring Process are used accoring to the Software developers and this may affect the DVD image quality Authoring Process Remark DVD Video Authoring Process Video Audio Master Surround Audio Master Subtitle Master MPEG 2 Encoding AC 3 MPEG Audio Encoding Cutting Master Disc Production Subtitle Encoding Authoring Process Video Audio Subtitle M...

Страница 17: ...rts List 3 1 Cabinet Assembly 3 2 3 2 VCR Mechanical Parts Top Side 3 4 3 3 VCR Mechanical Parts Bottom Side 3 6 3 4 DVD Mechanical Parts 3 8 You can search for the updated part code through ITSELF web site URL http itself sec samsung co kr Notice ...

Страница 18: ...ng Electronics 3 1 Cabinet Assembly DVD DECK S N A 157 BRACKET FRAME S N A 153 UT01 101 155 701 FUNCTION PCB 602 S M P S PCB TM401B 1 21 22 S N A Service Not Available 157 VCR DECK S N A 3 2 601 MAIN PCB LD601A OPEN CLOSE STANDBY ON OK 200 ...

Страница 19: ...DVD V3500 03 SECCOM43 LD601A AC61 21009A HOLDER LED X 9 POM M90 44 BLK TM401B AK97 00463A ASSY CON BOARD HIPS94HB PBS T0 2 SV DVD5 UT01 AK59 00008E REMOCON SV DVD55 SAMSUNG MODELS 1 21 200 601 SV DVD50 XEF AK97 00395B AK64 00196D AC39 10019A AK97 00323A SV DVD50 XEU AK97 00395A AK64 00196C AC39 12022K AK92 00199C SV DVD50 XEUI AK97 00395A AK64 00196C AC39 12022K AK92 00199H SV DVD50 XEG AK97 00395...

Страница 20: ...ctronics 3 2 VCR Mechanical Parts Top Side G001 G555 G510 G480 K546 G680 G681 B410 B475 B440 B448 B452 G546 G060 G520 G527 K188 K182 K110 K240 K248 K350 K330 K140 K340 G070 K470 B474 B473 K250 K530 K490 G530 G420 G450 K502 OPTIONAL OPTIONAL G560 ...

Страница 21: ... WSP PH M2 6 L5 0 ZPC G520 AC66 00033A LEVER 9 GUIDE ASS Y TS 10 G527 AC61 60553A SPRING ETC GUIDE 9 X 9 SUS304 WPB 0 25 G530 AC33 00007A HEAD FE HVFHPOO43A G546 AC66 00005A LEVER FL DOOR TS 10 POM NAT G555 AC66 00032A LEVER UNIT PINCH ASS Y TS 10 G560 AC61 00122A POST 8 GUIDE ASS Y TS 10 POM SUS 303 K110 AC66 10267A REEL DISK S X 9 POM K140 AC66 10268A REEL DISK T X 9 POM K182 AC66 30524A LEVER I...

Страница 22: ...Exploded View and Parts List 3 6 Samsung Electronics 3 3 VCR Mechanical Parts Bottom Side G542 B462 B560 B501 B484 B561 B488 B500 B456 B458 B464 B468 K222 K200 K225 K221 B478 B570 B460 B489 ...

Страница 23: ...SECC E20 20 1 B484 AC66 00030A GEAR LOADING DR ASS Y TS 10 POM SWPB B488 AC66 00023A LEVER S LOADING TS 10 POM NAT B489 AC66 00021A LINK LOADING S TS 10 SECC E20 20 0 8 B500 AC66 00024A LEVER T LOADING TS 10 POM NAT B501 AC66 00022A LINK LOADING T TS 10 SECC E20 20 0 8 B560 AC31 00022A MOTOR BLOWER CAPSTAN DMVCMC10A F2QVB35 B561 3809 001429 CABLE FLAT 30V 80C 140MM 10P 1 25MM UL28 B570 AC60 10514A...

Страница 24: ...Exploded View and Parts List 3 8 Samsung Electronics 3 4 DVD Mechanical Parts H107 S N A H105 H106 H103 H108 H104 H211 H241 H102 H206 H207 H206 H203 H202 H209 H210 900 900 903 903 904 H204 H205 ...

Страница 25: ...GULAR CR T1 2 4 3 1 2X25 1 B H106 AK66 00008A GEAR TRAY DP 9 POM H107 AK66 00009A SLIDER HOUSING DP 9 POM H108 AK63 00008B TRAY DISC DP 9 ABS BLK DP 9 H202 AK73 00005A RUBBER INSULATOR DP 9 BUTYL RUBBER H203 AH61 50327A SHAFT P U DP 3 SUS420J2 L84 7 OD3 H204 AK66 00010A GEAR FEED A DP 9 POM H205 AK66 00011A GEAR FEED B DP 9 POM H206 AK61 00032A HOLDER CAM SKEW DP 9 POM BLACK H207 AK31 00004A MOTOR...

Страница 26: ...9 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 C330 2203 000975 C CERAMIC CHIP 47nF 10 25V X7R TP 1608 C331 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 C332 2203 000975 C CERAMIC CHIP 47nF 10 25V X7R TP 1608 C333 2401 000414 C AL 10uF 20 16V GP TP 4x7 5 C334 2203 000975 C CERAMIC CHIP 47nF 10 25V X7R TP 1608 C335 2203 001652 C CERAMIC CHIP 470nF 80 20 16V Y5V TP C336 2203 000975 C C...

Страница 27: ... 35V GP TP 4x5 5 C530 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 C535 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 C536 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 C537 2401 000665 C AL 2 2uF 20 50V GP TP 3 5x5 5 C538 2401 000665 C AL 2 2uF 20 50V GP TP 3 5x5 5 C539 2401 001250 C AL 4 7uF 20 35V GP TP 4x5 5 C540 2401 001250 C AL 4 7uF 20 35V GP TP 4x5 5 C541 2401 000598 C A...

Страница 28: ... RECTIFIER 1N4002 100V 1A DO 41 TP D688 0401 000101 DIODE SWITCHING 1N4148 100V 200mA DO 35 D692 0402 000127 DIODE RECTIFIER 1N4002 100V 1A DO 41 TP D6P01 0401 000101 DIODE SWITCHING 1N4148 100V 200mA DO 35 D701 0401 000101 DIODE SWITCHING 1N4148 100V 200mA DO 35 D702 0401 000101 DIODE SWITCHING 1N4148 100V 200mA DO 35 D703 0401 000101 DIODE SWITCHING 1N4148 100V 200mA DO 35 D704 0401 000101 DIODE...

Страница 29: ...2701 000181 INDUCTOR AXIAL 33uH 5 2 4x3 4mm L814 AC27 92001M COIL INDUCTOR RH3 5X6 5RS BEAD RADIAL LD601 0601 000517 LED IR RECTANGULA 4x6 0mm 75mW 6V 950 PC1 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 PC10 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 PC11 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 PC12 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 PC13 2203 005148 C...

Страница 30: ...Kohm 5 1 16W DA TP 1608 R3Q2 2007 000090 R CHIP 10KOHM 5 1 16W DA TP 1608 R3Q3 2007 000076 R CHIP 330ohm 5 1 16W DA TP 1608 R3Q4 2007 001056 R CHIP 6 2Kohm 5 1 16W DA TP 1608 R3Q5 2007 000076 R CHIP 330ohm 5 1 16W DA TP 1608 R3Q6 2007 000259 R CHIP 1 6Kohm 5 1 16W DA TP 1608 R3Q7 2007 000083 R CHIP 3Kohm 5 1 16W DA TP 1608 R3Q8 2007 000076 R CHIP 330ohm 5 1 16W DA TP 1608 R3Q9 2007 001157 R CHIP 7...

Страница 31: ... TP 1608 R821 2007 000134 R CHIP 33Kohm 5 1 16W DA TP 1608 R822 2007 000094 R CHIP 22Kohm 5 1 16W DA TP 1608 R825 2007 000084 R CHIP 4 7Kohm 5 1 16W DA TP 1608 R839 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R841 2007 000119 R CHIP 560ohm 5 1 16W DA TP 1608 R842 2007 000119 R CHIP 560ohm 5 1 16W DA TP 1608 R843 2007 000119 R CHIP 560ohm 5 1 16W DA TP 1608 R844 2007 001167 R CHIP 75ohm 5 1 16W DA...

Страница 32: ...100nF 10 16V X7R TP 1608 SC36 2203 000257 C CERAMIC CHIP 10nF 10 50V X7R TP 1608 SC38 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 SC4 2203 001652 C CERAMIC CHIP 470nF 80 20 16V Y5V TP SC41 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 SC42 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 SC43 2203 001634 C CERAMIC CHIP 33nF 10 50V X7R TP 1608 SC44 2203 000715 C CERAMIC CHIP 3 3nF ...

Страница 33: ... 100nF 10 16V X7R TP 1608 ZC106 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 ZC107 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 ZC108 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 ZC109 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 ZC11 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 ZC112 2203 005148 C CERAMIC CHIP 100nF 10 16V X7R TP 1608 ZC113 2203 000041 C CERAMIC...

Страница 34: ...8 ZR46 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 ZR48 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 ZR5 2007 000078 R CHIP 1Kohm 5 1 16W DA TP 1608 ZR56 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 ZR57 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 ZR6 2007 000084 R CHIP 4 7Kohm 5 1 16W DA TP 1608 ZR62 2007 000084 R CHIP 4 7Kohm 5 1 16W DA TP 1608 ZR63 2007 001164 R CHIP 75ohm 1 1 16W DA TP 1608 ZR7 2007...

Страница 35: ... TP 2 4X6 4MM R1P103 2001 000362 R CARBON 150OHM 5 1 8W AA TP 1 8X3 2MM R1P104 2001 000449 R CARBON 2 2KOHM 5 1 8W AA TP 1 8X3 2M R1P105 2001 000969 R CARBON 75OHM 5 1 8W AA TP 1 8X3 2MM R1P109 2001 000362 R CARBON 150OHM 5 1 8W AA TP 1 8X3 2MM R1P110 2001 000449 R CARBON 2 2KOHM 5 1 8W AA TP 1 8X3 2M R1P111 2001 000062 R CARBON 470OHM 5 1 4W AA TP 2 4X6 4MM R1P112 2001 000302 R CARBON 10OHM 5 1 8...

Страница 36: ...n of arrow Œ REMOVE 3 SCREWS Fig 5 1 Cabinet Top Removal 5 1 3 Ass y Front Panel Removal Œ RELEASE 4 HOOKS RELEASE 3 HOOKS Top View Bottom View Fig 5 3 Ass y Front Panel Removal 5 1 2 Bottom Cover Removal Œ REMOVE 2 SCREWS RELEASE 2 HOOKS Fig 5 2 Bottom Cover Removal 5 1 4 Function PCB Removal Œ RELEASE 1 HOOK Fig 5 4 Function PCB Removal ...

Страница 37: ...REMOVE 4 SCREWS REMOVE 1 SCREW REMOVE 3 SCREWS MAIN PCB S M P S PCB DVD DECK VCR DECK Fig 5 5 Chassis Removal 5 1 6 VCR Main PCB Removal Œ REMOVE 3 SCREWS MODE SWITCH When installing the ass y full deck on the Main PCB be sure to align the assembly point of mode switch ASSEMBLY POINT Fig 5 6 VCR Main PCB Removal ...

Страница 38: ...Disassembly and Reassembly 5 3 Samsung Electronics 5 2 Circuit Board Locations S M P S PCB FUNCTION PCB MAIN PCB Fig 5 7 Circuit Board Locations ...

Страница 39: ...assembly Samsung Electronics 5 3 VCR Deck Parts Locations 5 3 1 Top View Œ ˇ ˆ Ø Fig 5 8 Top parts Location 1 Œ GEAR FL CAM MOTOR LOADING ASS Y ˇ LEVER FL ARM ASS Y HOLDER FL CASSETTE ASS Y ˆ LEVER FL DOOR Ø SLIDER FL DRIVE ...

Страница 40: ... Ø Ô Ò ˇ ˆ Fig 5 9 Top Parts Location 2 Œ FE HEAD CYLINDER ASS Y ˇ ACE HEAD ASS Y LEVER UNIT PINCH ASS Y ˆ LEVER 9 GUIDE ASS Y Ø LEVER TENSION ASS Y BAND BRAKE ASS Y DISK S REEL LEVER S BRAKE ASS Y GEAR IDLE Ô LEVER IDLE LEVER T BRAKE ASS Y Ò DISK T REEL ...

Страница 41: ...ng Electronics 5 3 2 Bottom View Œ ˇ ˆ Ø Fig 5 10 Bottom Parts Location Œ GEAR JOINT 1 GEAR JOINT 2 ˇ BRAKET GEAR MOTOR CAPSTAN ASS Y ˆ LEVER T LOAD ASS Y Ø GEAR LOADING DRIVE LEVER S LOAD ASS Y HOLDER CLUTCH ASS Y BELT PULLEY SLIDER CAM ...

Страница 42: ...e R in the same time to release hooking from Main Base until the Boss A of Holder FL Cassette Ass y Œ is taken out from the Rail B 3 Lift the Holder FL Cassette Ass y Œ in this time you have to grasp the Lever FL Cassette R Continuously until the Holder FL Cassette Ass y Œ is taken out completely Note Be sure to insert Lever FL Cassette R in the direction of A to prevent separation and breakage of...

Страница 43: ... 3 Slider FL Drive Gear FL Cam Removal 1 Pull the Slider FL Drive Œ to the front direction 2 Remove the Slider FL Drive Œ in the direction of arrow Refer to Fig 5 13 3 Remove the Gear FL cam Note When reinstalling be sure to reassemble Slider FL drive Œ after you insert the Boss of Lever FL ARM R in Groove of Slider Fl drive Œ Assembly Align the Gear FL Cam Œ with the Gear worm wheel Post as shown...

Страница 44: ...l Œ Œ GEAR WORM WHEEL Fig 5 16 Gear Worm Wheel Removal 5 4 6 Cable Flat Removal 1 Remove the Drum connecting part of Cable Flat Œ from Connector Waffer 2 Remove the Loading Motor connecting part of Cable Flat Œ from Connector Waffer ˇ ˇ CONNECTOR WAFER CONNECTOR WAFER Œ CABLE FLAT Fig 5 17 Cable Flat Removal ...

Страница 45: ... Gear Joint 2 as shown Fig 5 20 Refer to Timing point1 2 Confirm the Timing Point 2 of the Gear Joint 2 and Slider Cam ˇ Œ SCREW BRAKET GEAR GEAR JOINT 1 ˇ GEAR JOINT 2 Fig 5 19 Bracket Gear Gear Joint 1 2 Removal Œ GEAR JOINT1 GEAR JOINT2 ˇ SLIDER CAM TIMING POINT 1 TIMING POINT 2 Fig 5 20 Gear Joint 1 2 Assembly 5 4 7 Motor Loading Ass y Removal 1 Remove the screw Œ 2 Remove the Motor Loading As...

Страница 46: ...efer to Timing Point 3 LEVER LOAD S Œ LEVER LOAD T LEVER LOAD S LEVER LOAD T PIN A PIN C PIN B PIN D ˇ SLIDER CAM TIMING POINT 2 TIMING POINT 1 TIMING POINT 3 Fig 5 22 Gear Loading Drive Slider Cam Lever Load S T Ass y Assembly 5 4 9 Gear Loading Drive Slider Cam Lever Load S T Ass y Removal 1 Remove the Belt Pulley Refer to Fig 5 38 2 Remove the Gear Loading Drive Œ after releasing Hook A in the ...

Страница 47: ...y be sure to apply Grease on the post 2 Take care not to touch stain on the felt side and not to be folder and broken Band brake Ass y 3 After Lever Tension Ass y seated Rotate stopper of Main Base to the Mark B Œ SPRING TENTION LEVER STOPPER MARK B A LEVER TENTION ASS Y ˇ BAND BRAKE ASS Y Fig 5 24 Lever Tension Ass y Band Brake Ass y Removal 5 4 11 Lever Pinch Drive Lever Tension Drive Removal 1 ...

Страница 48: ...LEVER IDLE A HOOK C B Fig 5 26 Gear Idle Ass y Removal 5 4 13 Lever Brake S T Ass y Removal 1 Release the Hook A and the Hook B C in the direction of arrow as shown in Fig 5 25 2 Lift the Lever S T Brake Ass y Œ with spring brake ˇ Assembly 1 Assembly the Lever S Brake Ass y Œ on the Main Base 2 Assembly the Lever T Brake Ass y with spring brake ˇ Note Take extreme care not to be folded and transf...

Страница 49: ...Holder Clutch Ass y down with exces sive force Just insert Holder Clutch Ass y into post center with dead force and Rotate it smoothly Be sure to confirm that spring is in the slit of Gear Center Ass y as shown in detail B Œ DISK S REEL DISK T REEL Œ WASHER SLIT HOLDER CLUTCH ASS Y DETAIL A BAD SPRING GOOD BAD SPRING GOOD DETAIL B Fig 5 27 Disk S T Reel Removal Fig 5 28 Holder Clutch Ass y Removal...

Страница 50: ...an gular holes on Main Base as shown in Fig 5 30 2 Lift the Lever Up Down Ass y Œ about 35 Refer to Fig 5 30 3 Insert Ring of the Gear Center Ass y in the Guide of the Lever Up Down Ass y Œ 4 Insert the Gear Center Ass y in the post on Main Base 5 Push down the Lever Up Down Ass y Œ for locking of the Hook Note 1 Take care not to separate and sentence does not mark sense 2 Be sure to confirm that ...

Страница 51: ... to apply grease on the post pinch roller ˇ SPRING PINCH DRIVE Œ LEVER UNIT PINCH ASS Y PLATE JOINT Fig 5 32 Lever Unit Pinch Ass y Plate Joint Spring Pinch Drive Removal 5 4 20 Lever 9 Guide Ass y Removal 1 Remove the Spring 9 Guide Œ 2 Lift the Spring 9 Guide Ass y in the direction of arrow A Note 1 Take extreme care not to get grease on the tape Guide Post 2 After reinstalling check the bottom ...

Страница 52: ...CE Head Removal 1 Pull out the FPC from connector of ACE Head Ass y 2 Remove the screw Œ 3 Lift the ACE Head Ass y Œ SCREW HEAD ACE ASS Y Fig 5 35 ACE Head Removal 5 4 21 FE Head Removal 1 Remove the screw Œ 2 Lift the FE Head Œ FE HEAD Fig 5 34 FE Head Removal ...

Страница 53: ... 3 Lift the Cylinder Ass y ˇ Assembly 1 Match the 3 holes in the bottom of Cylinder ass y ˇ to the 3 holes of Main Base as attending not to drop or knock the Cylinder ass y ˇ 2 Tighten the 1 Screw Œ 3 Match the Plate Ground Deck to the Hole of Base Main 4 Tighten the other 2 Screws Œ Note 1 Take care not to touch the Cylinder Ass y ˇ and the tape guide post at reinstalling 2 When reinstalling Don ...

Страница 54: ...ion of arrow as shown detail drawing 3 Assemble the Damper Capstan Œ Note After tightening screws check if there is gap between the head of screws and the top side of Main Base There should have no gap between the head of screws and the top side of Main Base After reinstalling adjusting the tape transport system again A B C Œ 3 SCREWS MOTOR CAPSTAN ASS Y Fig 5 39 Motor Capstan Ass y Removal 5 4 25...

Страница 55: ...inded tape Refer to Fig 5 43 If you rotate Gear Worm Œ continuously when tape is in state of unwinding you may cause a tape contamination by grease and tape damage Be sure to wind the unwinded tape in the state of set horizently 3 Rotate Gear Worm Œ clockwise using screw driver again up to the state of eject mode and then pick out the tape Refer to Fig 5 42 FRAME 5 4 27 Post 8 Guide Ass y Removal ...

Страница 56: ... 8 GUIDE SHAFT CAPSTAN SHAFT 9 GUIDE POST 3 GUIDE POST GUIDE ROLLER S T O O O O O O O CYLINDER ASS Y O O O O O O O O O FE HEAD O O O O O O O ACE HEAD O O O O O O O O O PINCH ROLLER O O O O O O O O O POST REEL S T SLEEVE TENSION POST CENTER LEVER IDLE BOSS 2Point CAPSTAN MOTOR PULLEY O O O O O BELT PULLEY O O O O O O O HOLDER CLUTCH ASS Y O O O O O O O O O GEAR CENTER ASS Y O O O O O O O O O GEAR I...

Страница 57: ...Slider Housing ˇ in the direction arrow A 2 When the Tray Disc comes out a little pull it in the direction arrow B by hand 3 Pull the Tray Disc to disassemble while simultaneously pushing 2 Stoppers ˆ left right in the direction arrow C D Fig 5 44 Tray Disc Removal B ˇ SLIDER HOUSING D TRAY DISC A Œ SCREW DRIVER EMERGENCY HOLE ˆ STOPPER C ˆ STOPPER ...

Страница 58: ...6 2 Assy P U Deck Removal 1 Disconnect DCN2 Œ DCN3 2 Lift down the Assy P U Deck ˇ while simultaneously pushing 2 Hooks ˆ in the direction of arrow A B Fig 5 45 Assy P U Deck Removal Œ DCN2 DCN3 ˇ ASSY P U DECK Assembly Point SLIDER HOUSING B A ˆ HOOK HOOK ...

Страница 59: ...nd lift up Pulley Gear ˇ 3 Push the Slider Housing ˆ in the direction arrow B and lift up the Gear Tray 4 Lift up the Slider Housing ˆ 5 Remove 2 Screws Ø and lift down the Motor Load Assy 6 Remove Clamper Ass y Fig 5 46 Housing Ass y Removal Œ BELT ˇ PULLEY GEAR GEAR TRAY MOTOR LOAD ASSY Ø 2 SCREWS ˆ SLIDER HOUSING CLAMPER ASSY B HOOK A ...

Страница 60: ...5 Samsung Electronics 5 6 4 Sub Chassis Removal 1 Remove the Soldering of Motor Feed wire Œ 2 Remove the 4 Screws 3 Lift up the Ass y Brkt Deck ˇ Fig 5 47 Sub Chassis Removal 4 SCREWS ˇ ASSY BRAK DECK Œ SOLDERING OF MOTOR FEED WIRE ...

Страница 61: ...3 Screws ˇ and 3 Holder Cam Skew 3 Remove Shaft Pick Up ˆ and Pick Up Assy Ø 4 Remove Gear Feed A 5 Remove 2 Screws 6 Remove Motor Feed Ass y 7 Remove 3 Screws 8 Remove Motor Spindle Ô Fig 5 48 Ass y Brkt Deck Removal 2 SCREWS 3 SCREWS ˇ 3 SCREWS HOLDER CAM SKEW GEAR FEED B ˆ SHAFT PICK UP GEAR FEED A MOTOR FEED ASS Y Ø PICK UP ASS Y Ô MOTOR SPINDLE Œ HOOK A ...

Страница 62: ... replacing the cylinder ass y be sure to adjust the X Point and Head switching adjustment 4 How to adjustment Intermittently short circuit the Test Point on Main PCB with pincers to the adjustment mode If the corresponding adjustment button is pressed the adjustment is performed automatically If the adjustment is completrd be sure to turn the power off 6 1 1 a Location of adjustment button of remo...

Страница 63: ...6 2 Alignment and Adjustments Samsung Electronics 6 1 1 b TEST location for adjustment mode setting Fig 6 2 Main PCB Top View Short Circuit for few seconds and release Just one time ...

Страница 64: ...t set the unit will operate Table 6 1 NVRAM Option Table CNG OK SAVE RETURN 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fig 6 3 MODEL OPTION NUMBERS SV DVD50 XEF 2 4 5 6 7 8 9 10 11 12 13 15 20 21 26 32 33 34 35 36 38 40 45 47 6...

Страница 65: ...6 4 Alignment and Adjustments Samsung Electronics 6 2 DVD Adjustment 6 2 1 Location of Test Point Fig 6 5 Location of test Point Main PCB Top Side RIC1 RIC1 ...

Страница 66: ...Spec and Test Point 6 2 2 Skew Adjustment Test Disc Adjustment Spec Test Point Adjustment Location TDV 533 ENV Ass y Deck Top Side Chapter 14 Flat Waveform DVD Main PCB Top Side See Fig 6 6 See Fig 6 5 Fig 6 6 Ass y Deck Top Side Test Disc Service not Available Table 6 2 ...

Страница 67: ...cilloscope Range as follows Voltage 50mV Div Frequency 10m Sec 3 Adjust the Screws A and B See Fig 6 6 using a Hex screwdriver until you obtain a Flat Waveform and the picture is stable Then go to Chapter 1 and make sure the Waveform is Flat here as well If not you have to go back to Chapter 14 and adjust again If you cannot obtain a Flat waveform then the unit is defective Note The Deck must be i...

Страница 68: ...the height of the tape guide and prevent damage do not apply excessive force onto the main base Fig 6 8 Location of Tape Transport Adjustment Fig 6 9 Tape Travel Diagram CYLINDER ASS Y TAKE UP REEL DISK 8 GUIDE POST 9 GUIDE POST SUPPLY REEL DISK CAPSTAN PINCH ROLLER GUIDE ROLLER T GUIDE ROLLER S FULL ERASE HEAD 3 GUIDE POST TENSION POST HEIGHT SCREW TILT SCREW X POSITION ADJUST SILT AZIMUTH SCREW ...

Страница 69: ...e is still observed at the tape guide perform the tilt adjustment of the ACE head 1 ACE Head Assembly Adjustment a ACE HEAD HEIGHT ADJUSTMENT 1 Run the alignment tape Color bar in the playback mode 2 Observe surface of the audio head using a dental mirror 3 Turn screw C clockwise or counterclockwise until the gap of lower tape edge and the lower edge of the control head is about 0 25mm Refer to Fi...

Страница 70: ...wer flange of tape guide as shown in Fig 6 12 B 3 If a curl or wrinkle of the tape occurs slightly turn the screw A tilt adjust on the ACE head ass y 4 Reconfirm the ACE head height Fig 6 12 Tape Guide Check c AUDIO AZIMUTH ADJUSTMENT 1 Load alignment tape Mono scope and playback the 6KHz signal 2 Connect channel 1 scope probe to audio output 3 Adjust screw B to achieve maximum audio level See Fig...

Страница 71: ...ons then adjustment is operates automatically See Fig 2 1 4 Connect the CH 1 probe to Envelope the CH 2 probe to H D switching pulse and then trigger to CH 1 5 Insert the driver into the X Point adjustment hole and adjust it so that envelope waveform is maximum Test point TP2 Audio Output TP3 Envelope TP4 H D S W Trigger TP5 Control Pulse Fig 6 13 Location of Test point Main PCB Top View AUDIO OUT...

Страница 72: ...lope b Minimum output of the video RF envelope at the entrance side c Minimum output of the video RF envelope at the center point d Maximum output of the video RF envelope at the exit side 4 If the section A in Fig 6 15 does not meet the specification adjust the guide roller S up or down 5 If the section B in Fig 6 15 does not meet the specification adjust the guide roller T up or down Fig 2 14 En...

Страница 73: ...ope CH 1 to the Envelope and CH 2 to the H D SW Pulse for triggering 8 Turn the guide roller heads with a flat head driver to obtain a flat video RF envelope as shown in Fig 6 16 Fig 6 16 Guide Roller S T Height Adjustment IDEAL ENVELOPE SHEIGHTTOOHIGH SHEIGHTTOOLOW THEIGHTTOOHIGH THEIGHTTOOLOW GUIDE ROLLER S GUIDE ROLLER T ...

Страница 74: ...e Changes from RPS to Play Mode 4 Envelope Check 1 Make recordings on T 120 E 120 and T 160 E 180 tape Make sure the playback output envelope meets the specification as shown in Fig 6 18 2 Play back a self recorded tape recording made on the unit using with T 120 E 120 The video envelope should meet the specification as shown in Fig 6 18 In SP mode A should equal B If the head gap is wide upper cy...

Страница 75: ... ass y drives the disk reel S T through gear idler by rotation of gear center ass y 3 Brake is operated by slider cam at FF REW mode 4 Transportation of accurate driving force is done by gears Gear Center Ass y Note If the spec does not meet the followings specifications replace the holder clutch ass y and then recheck MODE TORQUE g cm GAUGE PB 42 11 Cassette Torquemeter RPS 145 30 Cassette Torque...

Страница 76: ...Ns Vp Np REGULATOR Common power Ex 220V 50Hz Fig 7 1 Linear Power Supply Waveform Description Vs t 0 Fig 7 2 Vs t 0 Fig 7 3 Vout t 0 Fig 7 4 Input Common power to transformer Vp The output Vs of transformer is determined by the ratio of 1st Np and 2nd Ns Vs Ns Np x Vp Vout is output DC by diode and condensor 7 Circuit Operating Descriptions ...

Страница 77: ...sed by margin design Greater core size and condensor capacity are ne eded because the transformer works on a single power frequency b S M P S Switch Mode Power Supply v Vreg Vout 0 t Change by common power Regulator loss Fig 7 5 Terms 1 1st Common power input to 1st winding 2 2nd Circuit followings output winding of transformer 3 f Frequency Switching frequency T Switching cycle 4 Duty Ton T x 100...

Страница 78: ...occurs at switch off because of the 1st winding of transformer V LI xdi dt LI Leakage Induction A very high residual voltage exists on both terminals of SCS11A because dt is a very short 2 SNUBBER circuit protects SCS11A from damage through leakage voltage suppression by RC Charges the leakage voltage to D1SS11 and C1SD12 and discharges to R1SD11 and R1SD13 3 C1SS16 For noise removal c IC1SS2 Vcc ...

Страница 79: ...rrent down IC1S03 of A K current down IC1S03 Diode current down IC1S03 C E current down IC1S03 C E voltage up IC1SS2 F B voltage up Out Duty up Transformer 1st current up Transformer 1st power up Vout up Maintain Vout 5 8V 3 If load of 5 8 V terminal decreases or AC input voltage rises and Vout rises above 5 8V then Reverse sequence of the above description Duty down Vout down Maintain 5 8V i e th...

Страница 80: ...g Circuit 33V Rectified Smoothing Circuit 5V Rectified Smoothing Circuit 15V Rectified Smoothing Circuit 5V Rectified VoltageCircuit X2 12V Rectified VoltageCircuit 9V Rectified VoltageCircuit O U T P U T Fig 7 9 b IC1SF01 ICE2B0565 Internal Block Diagram VCC Power Manag em ent Protecti on Unit Soft Start Co ntrol PW M Co ntrolle r Cu rren t Mo de FB Drain Co olMO S PWM Controller Low Power StandB...

Страница 81: ...o inputs the detected output from the tape and mechanism protection sensor and protects the VCR and tape against abnormal operation Fig 7 11 is a simplified system control block diagram The system control is performed by 4 control sections System and timer control Servo control F S Tuner On Screen Display LED DISPLAY REMOCON SYSCON MECHA BLOCK Hi Fi IC EPROM IC TM BLOCK AV BLOCK OSD BLOCK IIC COMM...

Страница 82: ...Circuit Operating Descriptions 7 7 Fig 7 12 Block Diagram ...

Страница 83: ...Control the phase of drum and capstan motor 6 Record Safety Tap Detection Detects the safety tab on the rear of a cassette to prevent a prerecorded program from being erased 7 Loading Unloading control Controls a series of loading unloading operation after the u COM judges the operation mode and sets the mechanism to suitable mode Fig 7 13 show correlation between u COM and peripheral components d...

Страница 84: ...otor Drive IC is designed to drive Loading Motor Capstan Motor Cylinder Motor in one IC Table 7 2 Motor Control Logic POSION CAM S W START ACTION MODE A B C SEN STANBY 0 0 0 0 Eject POWER OFF 0 0 0 1 Unload POWER OFF LOADING START 0 0 0 1 Tape loading start point LOADING END 1 0 1 1 1 Tape loading end point REV 1 1 0 X Reverse picture search reverse SLOW PLAY 0 1 0 X Play Rec F PS Still SLOW F ADV...

Страница 85: ...p fast forward rewind forward search reverse search still mode etc Indication output PLAY lights in LED display Output at IC601 Pin 25 CAP F R Hi 8 Trick Play Mode Trick play modes are classified into forward search reverse search still slow and frame advance Audio signal is muted V lock is controlled by pin 31 of IC601 9 Forward Search Mode 5 Times play speed search in SP State input Press the fa...

Страница 86: ...unter blinks in LED display Output at IC601 Pin 25 CAP F R Hi 14 Record Mode Must use a cassette with the safety tab Index signal is recorded on the control track of the tape at the start of recording State input Press the record button during stop mode and record pause mode or at the preset time reached in the timer record mode Press the REC button in stop mode Indication output R lights in LED d...

Страница 87: ...rch System Index search Find a certain point of the tape using high speed REW FF and start playback Fig 7 14 The detection is obtained by adjusting the width of the control pulse duty cycle When recording starts the duty cycle of control pulse will change and then record on the control track of the tape for 2 seconds Fig 7 14 Index Recording REC CTL PB CTL NORMAL RECORD INDEX RECORD 100 100 60 5 2...

Страница 88: ... on state in the reel emergency Fig 7 15 Reel and Cylinder Lock T END S END Sensor R676 R677 66 75 74 98 99 R679 R678 R691 R682 R675 C633 C634 21 Cylinder Lock Sensor Cylinder lock sensor detects abnormal rotation of the cylinder motor Cylinder FG pulse is supplied to pin97 of IC601 MICOM measures the period of the pulse in the play record search and trick play models When H d S W frequency is les...

Страница 89: ...tape direction so the counter counts up when the CAP F R signal is Hi and the counter counts down when the CAP F R signal is Low By counting the control pulse the counter data is supplied to the VF display Counter displays the time and it is increased or decreased by one minute after counting 1500 control puls es Counter mode is switched to clock mode when the display button is pushed or when the ...

Страница 90: ... of the IC601 during PB period in Slow mode These port is applied to Video IC to operate the trick play 24 Timer OTR Control The timer can preset 6 programs in one year including daily and weekly programs Express recording lets the operator record up to 9 hours without programming the timer 25 Clock Display The clock generator inside of the u COM counts the oscillation signal of XT601 for the time...

Страница 91: ...eed of the cylinder motor The speed is kept at a constant 1500 RPM and the phase determines the mechanical position relative to the vertical Sync signal The capstan servo loop controls the phase and speed of the capstan motor so that the video head can trace the video track correctly It keeps tape speed constant according to the mode SP LP during playback and recording Table 7 3 Servo System Signa...

Страница 92: ...PBCTL amplifier RECCTL head Kp Kp Kv Kv Drum speed gain Drum phase gain Capstan phase gain CFG amplifier VSYNC separation circuit composite sync signal Vertical sync signal DPG comparator DFG amplifier PWM conversion Motor driver Motor driver Carrier rejection filter Carrier rejection filter M Drum motor M Capstan motor CFG signal DPG signal DFG signal Remark The broken line indicates the internal...

Страница 93: ...vided CFG signal And than it does in playback mode by comparing HD S W which is synchronized with DFG and DPG with PB CTL signal The latch signal for the phase error data in record mode is the divided CFG signal which is divided from the CFG signal in the CFG frequency divider to a frequency of 25Hz In playback the latch signal is the divided CFG signal obtained by frequency division from the risi...

Страница 94: ...e rotation phase and speed of the drum When the error is zero the PWM circuit outputs a waveform with a 50 duty cycle The phase counter error detector compares the phase of the DPG pulse tach pulse which contains video head phase information with a reference signal In the actual circuit the comparison is carried out by comparing the head switching HSW signal which is delayed by a counter that is r...

Страница 95: ...till slow The value is varied by tracking up down key in trick play mode the variable range from 3H to 12H In trick play mode the V LOCK pulse position of CH 1 is variable but CH 2 is fixed During search mode both CH 1 2 and V LOCK position are fixed to 6 5H CH2 CH1 HEAD SW EDGE V LOCK PULSE PEDESTAL LEVEL 1 2 H Fig 7 20 V LOCK PULSE ...

Страница 96: ...y AGC detector so that the output is constant approx 2Vp p The output signal of AGC is clamped by the FBC Feed Back Clamp cir cuit This signal appears at pin 26 after being amplified at the internal video amp and driver The output signal from the clamp circuit enter the detail enhancer circuit In the detail enhancer circuit the low level high frequency video signal is emphasized to improve the ori...

Страница 97: ...or the white peak The actual device which constitutes the FM modulator is a stable multivibrator This multivibrator generates a sine wave output of variable frequency The frequency of sine wave is governed by the level of the processed video signal at any given point Therefore the processed video signal varies the frequency of the sine wave which is frequency modulation FM During playback in SLP m...

Страница 98: ...nal is applied to FM AGC 2 FM AGC AMP At the FM AGC Amp FM signals are automatically balanced One of the AGC circuit outputs is fed to AGC detector circuit which detects signal level fluctuations The detector output signal is applied to the FM AGC Amp to keep the output constant This output is applied to the PB FM EQ block FM EQ is correct the phase distortion and level The signal through PB EQ ci...

Страница 99: ...returns the emphasized high frequency component to the original value 6 Non Linear De Emphasis Circuit This circuit is the counter part of the dynamic pre emphasis circuit during recording The characteristics are also the opposite of those in recording 7 Drop Out Compensator YNR Circuit This circuit compensated for missing parts of the FM signal due to dust dirt on the tape or irregular tape coati...

Страница 100: ...es of output components which are the added frequency of 5 06 4 43 9 49MHz and the difference frequency component 627KHz Added frequency is rejected by the 1 3MHz LPF and the 627KHz down converted chroma signal is supplied to the luma chroma mixer of pre amp block and then recorded on the tape via the record amp and heads AFC detection is performed with the head switching pulse and the fh signal g...

Страница 101: ...tself during SP and SLP provides a some what better S N ratio 3 Four 4 Phase Rotation CH1 is advanced 90 degrees every channel while CH2 is delayed 90 degrees When the frequency is set to 627KHz if phase is shifted by 90 it becomes 627KHz 90 The 40fh 90 627KHz 90 is balanced modu lated via fsc 4 43MHz depending on which side band is detected That is the fs 40fh 90 4 2MHz 90 of total frequency is s...

Страница 102: ...signal and converted into 5 06MHz 627KHz signals 2 Main Converter Inside of IC the main converter converts the 627KHz rotational chroma signal to a 4 43MHz non rotational signal The two inputs of this main converter are the 627KHz signal which comes from the output of the ACC and a 5 06MHz which has the same rotational phase as the 627KHz signal It is important that the rotational phase of the 5 0...

Страница 103: ...circuit REC EQ circuit and a PB EQ circuit Hi Fi and Linear audio share the same input selector output selector and mute circuit 1 REC Mode L CH Only IN SEL REC AMP INPUT ALC LPF PNR MOD 26 REC FM OUT SEL CONV LINEAMP 80 LINE OUT LINEAR IN LINEAR OUT 4 6 PRE AMP INPUT BPF DEMOD LPF PNR CONV LINEAMP 80 LINEAR IN OUT SEL 4 LINE OUT Fig 7 25 REC Mode L CH Only Fig 7 26 PB Mode L CH Only 2 PB Mode L C...

Страница 104: ...signals exceeding the size limit to max deviation of 150KHz 7 VCO Voltage Control Oscillation It is a modulation function that oscillates 1 3MHz L CH and 1 7MHz R CH 8 RF LPF It is a function to eliminate the harmonic components of Hi Fi carrier formed during VCO which may affect other block It s pass band approximately 2MHz 9 MIXER It mixes the Hi Fi carrier formed in L CH and R CH However due to...

Страница 105: ...ed without properly treating the damage on Hi Fi envelope caused by scratch on the tape noise occurs In order to improve this noise occurrence DO DET compensate the drop out using the same methode of compensating the switching noise when the damage on the envelope ranges 10 15mVpp 17 ENV DET To obtain optimal tracking envelop must be peak to peak and micom should be in DC It is a function to conve...

Страница 106: ...d uses magnetic recording device it only records limited size and as the size of input signal increases distortion increases To prevent this occurance mark sure the signal does not get bigger even if the level of distortion repodly increases 3 LINE AMP Line amp s gain is approximately 23dB The purpose of the line amp is to amplify to 68dB in order to obtain the recorded signal on the tape during p...

Страница 107: ...be considered when designing rec amp The REC amp should be the opposite to playback characteristics OUTPUT PB AMP INPUT R1 R2 Fig 7 29 REC Amp 7 OSC Oscillation Oscillation frequency is 70KHz It s size is approximately 40Vp p it operates on recoed mode It is supplied to audio erase head and full erase head used to erase already recorded signals Also it conducts AM Amplitude Modulation using oscill...

Страница 108: ...channel 4 by an RF modulator so that the signal can be received by conventional TV receivers 2 Tuner modulator block As explained this model is designed in one package to contain a RF MODULATOR BLOCK TUNER BLOCK AND IF DEMODULATOR BLOCK Its size is greatly reduced and other noise interference can be minimized to make performance high Fig 7 30 Tuner demodulator Block Diagram 11 3 5 12 21 23 24 ANT ...

Страница 109: ...and 3ch 61 25MHz 4ch 67 25MHz B PLL synthesized audio FM 4 5MHz C The 4 43MHz reference frequency for PLL can either be generated internally or input from an external source Fig 7 31 Modulator Section Block Diagram ANTENNA TO TUNER SECTION HIGH CH OSC LOW CH OSC CH S W ANT S W VIDEO OUT TO TV AUDIO IN 2 ANT S W DRIVER VIDEO MOD FM MOD AUDIO CARRIER MOD WHITE CLIP VIDEO IN 6 ...

Страница 110: ...ve rejection characteristic which results in a better band characteris tic D MOP IC Mixer OSC PLL It consists a VHS and UHF OSC and mixer circuit We applied a double balance mixer to have better rejection characteristic it shows especially various beat characteristic It serects channels and contains charge pump band driver The minimum step standard frequency 27 97KHZ AGC from IF Section Prescaler ...

Страница 111: ... D FM DETECTOR After removing AM signal in the limiter AMP amplified SIF signal is applied FM detector This FM detector is PLL detecting type E AFT DETECTER AFT automatically controls the OSC frequency in the tuner so that it retains a constant level It is a quadrature detection type The carrier which is detected from video det is directly input to AFT detector The 90 degree delayed phase signal i...

Страница 112: ...e Fig base band spectrum First the SAP signal only is extracted using SAP BPF Then this is subjected to FM detection Finally residual high frequency components are removed and frequency characteristic flattened using SAP LPF and the SAP signal is input to the dbx TV block 4 dbx TV BLOCK Either the L R signal and SAP signal input is selected by the mode control and input to the dbx TV block The inp...

Страница 113: ...g Descriptions 7 38 fH 2fH 3fH 4fH 5fH 6fH 6 5fH fH f15 734KHz f 3 15 50 25 50 PEAK DEV KHz L R 50 15KHz 25 AM DSB SC PILOT 5 L R dbx TV NR SAP dbx TV NR FM 10KHz 50 10KHz TELEMETRY FM 3KHz Fig 7 34 Base Band Spectrum ...

Страница 114: ...ecting sync if no sync is detected a blue screen is displayed In other word the OSD circuit displays character on the video when there is a video signal or on blue screen when there is no video signal No sync 21 2 CVin 2fsc 4 fsc oscilator Sync signal generator H Background video signal CVout Blue Background Super impose Dot display control Charater data ROM 128 charaters Control circuits display ...

Страница 115: ... unnecessary components around the sync signal are muted low chroma signal is output to Pin 18 after through Buffer This mute circuit also has the function of remove unnecessary component during vertical sync signal and output control owing to Pin 1 2 PB Mode Fig 7 37 Signal flow in PB mode 14 18 The signal which input from Pin 14 at first enter AGC amplifier and adjust for lever Gain of this AGC ...

Страница 116: ...Circuit Operating Descriptions 7 41 3 Block Diagram Fig 7 38 LA70100M Block Diagram ...

Страница 117: ...H AUDIO AMP IC501 HI FI AUDIO IC301 A V ONE CHIP JC801 SCART2 A V IN JK701 FRONT JACK A V IN IC601 VCR u COM DVD L VCR H Fig 7 39 Block Diagram Table 4 Output Signal Switching Condition Block Input Signal Input Pin Output Signal Output Pin 9 10 11 CTL Level Output Signal Type Video Pin 13 Video Pin 14 High VCR Video VCR Audio Pin 1 Low DVD Video Pin 3 Audio L Pin 15 High VCR Audio L Video Pin 12 L...

Страница 118: ...es the key commands of front panel or instructions of remote control through communication with Micom IC601 MN101DF06 of front and controls the devices on board to execute the corresponding commands after initializing the devices connected with micom on board at power on 2 Block Diagram RIC1 RF AMP S5L1463 SIC1 DSP DIGITAL SERVO S5L1455X AIC2 D A CONVERTER PCM1742KE ZIC1 MPEG DECODER CPU VADDIS5E ...

Страница 119: ...IC1 126 DSPCS DIC1 2 DVD1CS ZIC1 208 CSB SIC1 10 0 Low before trial So to speak the bus is used by time division as shown in Fig 7 41 Two and more devices can t be accessed simultaneously CH1 CH2 CH3 CH4 Fig 7 41 Servo Chip Access CH1 DSPCS ZIC1 123 DSP CHIP SELECT CH2 FLASHCS ZIC1 126 FLASH CHIP SELECT CH3 WR 9ZIC1 129 MICOM OUTPUT WRITE SIGNAL CH4 RD ZIC1 128 MICOM OUTPUT READ SIGNAL ...

Страница 120: ... 7 42 shows the flow of signal generated by the pick up A B C D signals detected from pick up are converted in to RF signal A B C D via RF summing AMP PICK UP RE SUM AGC RF EQ DPD TE Mux ENV FOK DEFECT TESEL TE GCA GCA ALPC MIRR 1 2 3 6 7 104 104 104 104 z Z L 105 104 RFAGCO EQIN MIRRI q E e o r Y O MIRR TE RFEQO A A B C D B C D E F LDDVD LDDVD PDDVD PDDVD LDCD LDCD PDCD PDCD 9 0 ABCD FE DFCT1 PLL...

Страница 121: ...F EQ_FREQ EQ_BOOST EQG_CEN X z b B v Z Fig 7 43 The control parameters of DVD EQ and CD EQ are as follows 1 DVD CD EQ control parameter Œ EQG_CEN EQ_BOOST Changes the gain of peak frequency with EQ frequency characteristic EQ_FREQ Changes the peak frequency with EQ frequency characteristic ...

Страница 122: ...reated from Pick up 3 SLED Linked SERVO When the tracking actuator inclines outwardly as the object lens follows the track during play the SLED motor moves slightly and counteracts the incline 4 CLV SERVO DISC Motor Control SERVO Controls the disc motor to maintain a constant linear velocity necessary for RF signal 2 Block Diagram Fig 7 44 DISC DECK RIC1 S5L1463 SIC1 S5L1455 to ZIC1 Vaddis5E SIC3 ...

Страница 123: ...e same in CD and DVD Fig 7 45 b Play When focus loop closes the loop during focus servo on both pin 65 and pin 75 of SIC1 are controlled by VREF voltage approx 1 65V and pin 26 27 of SIC3 are approximately 2 5V 2 TRACKING SERVO A NORMAL PLAY MODE Œ For DVD Composite The signal output from PD A B C D of Pick up the tracking error signal pin31 of RIC1 uses the phase difference of A C and B D in RIC1...

Страница 124: ...D SERVO Normal play mode Move SLED motor slightly by means of PWM signal in SIC1 pin 26 as the tracking actuator moves along with track during play Control to move the entire Pick up as the tracking actuator moves Coarse serach mode In case of long distance search such as chapter serach SIC1 uses MIRR and TZC signal of SIC1 37 159 Then read ID and compute the existing track count after input of ne...

Страница 125: ...e last data read from disc until now It takes some times to jump to the previous track and return to the original jump location again The memory will have an empty space because A V decoder reads out data of mem ory When the memory has an empty space where data can be processed and written and the pick up correctly gets to the original location before kick back location again it reads data again a...

Страница 126: ...1 3 Waveform Description It measures the timing that data processed in SIC1 at DVD playback CH1 CH2 CH3 CH4 Fig 7 47 CH1 STROBE SIC1 123 CLOCK CH2 REQ SIC1 124 DATA REQUEST CH3 DACK SIC1 125 DATA ACKNOWLEDGE CH4 SDATA SIC1 126 133 SDATA ...

Страница 127: ...ming of 8bit video signal of ITU R601 format The separate signal is encoded to NTSC PAL by control of MIC1 The above signals which are CVBS Composite Video Burst Synchronized G GREEN Y PIN139 Y S_VIDEO B BRUE Pb PIN145 and C S_VIDEO R RED Pr PIN151 are selectively outputted CVBS S_VIDEO RGB Component by the rear switch In Course of encoding 8bit data can extend to 10bit or more To convert the exte...

Страница 128: ...ed via post filter and amplifier CD and VCD are outputted with only 2 channels audio data and transmit them to Data 0 If DVD of multichannel Source disc if is downmixed and transmit them to Data0 If you want to listen to the multichannel output you have to connect digital output with AC 3 amp or MPEG DTS amp 2 Block Diagram AIC2 PCM1742KE D A CONVERTER POST FILTER POST FILTER AMP AMP ZIC1 Vaddis 5...

Страница 129: ... isn t compressed so it is called CD DA LPCM data The 2 channels data is converted through audio decoder 2 channel data and Data 0 and are outputted in digital audio interface Via IEC 958 output process they is transmitted to digital amplifier or AC 3 MPEG DTS amplifier built in the external digital input source with IEC 958 1937 transmission format AUDIO INPUT BUFFER AUDIO OUTPUT BUFFER RECEIVER ...

Страница 130: ... in Fig 8 1 the mechanism of VCR is configured with five main blocks and each operation is precisely controlled by the microcomputer built in the system control section First load a video cassette tape in VCR 1 The cassette is automatically set on the reel disc 2 The tape is pulled out from the cassette and wrapped around the cylinder 3 The cylinder turns in a constant speed rate synchronizing wit...

Страница 131: ...d and reproduce a control signal at lower side of the tape and an audio erase head to erase only the audio signals and perform after recording in parallel with the audio head are provided at T reel side tape exit side of the cylinder The guide parts marked with asterisks are equipped with the adjusting mechanism to stabilize the tape run ning or to record and reproduce the signals precisely Fig 8 ...

Страница 132: ... record playback fps rps modes the reel take up torque is controlled by the clutch mechanism thereby the tape fed by the capstan is taken up with a proper torque In the FF and REW modes the clutch enters a direct connecting status in which the clutch mechanism does not operate and the capstan drive torque is transmitted without reduction so a high speed taking up is enabled Fig 8 4 Reel Drive Syst...

Страница 133: ...deo cassette is horizontally moved 5 The cassette tape is vertically moved In this case the cassette lid is opened 6 The cassette tape is set on the reel disc and loading operation completes 7 The cassette tape is loaded 8 The status becomes full loading 9 When the cassette is out the reverse steps of the above procedure are carried out Fig 8 5 Cassette IN Start Sensor OFF Microcomputer Microcompu...

Страница 134: ...case the tension post loading tape guide capstan motor and the No 9 guide are positioned inside of the tape in the cassette case Fig 8 7 Cassette IN OUT Mode Cylinder T slant guide T guide roller ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan T Tape up reel disc Capstan belt Clutch gear Clutch mechanism Idle gear S slant guide S guide roller FE head Tension post Tape guide S Supply...

Страница 135: ...condition Fig 8 8 Tape Loading Cylinder T guide roller ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan Guide post Guide post S guide roller FE head Tension post Tape guide 8 4 4 Playback Standby Mode In the full loading system the tape loading starts at the same time when the cassette mounting has completed the mechanism shifts to the playback position and enters the standby status ...

Страница 136: ... according to the rotating direction of the capstan motor As a result the T reel rotates in the FF mode or the S reel rotates in the REW mode thus taking up the tape to the rotating reel Fig 8 9 FF REW Mode Cylinder T slant guide T guide roller Video tape Magneticside ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan T Tape up reel disc Capstan belt Clutch gear Clutch mechanism Idle g...

Страница 137: ... thereby stabilizing the tape tension The tape fed by the capstan is taken up around the T reel The T reel is driven with a constant torque generated by transmitting rotation of the capstan motor to the clutch mechanism Fig 8 10 Record Playback Mode Cylinder T slant guide T guide roller Video tape Magneticside ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan T Tape up reel disc Capst...

Страница 138: ... microcomputer controls signal switchings for each circuit according to the mechanism status Remote control Remote Main microcomputer Loading motor drive broken safety tab Tape stsrt sensor Take up Supply Stsrt sensor Tape Mode sensor Detecting of mechanical mode position Detection of cassette in cassette out Loading motor control Voltage direction Capstan motor control Speed direction Abnormal re...

Страница 139: ...ading drive gear Pinch drive lever Tension drive lever S brake T brake Up Down lever FL arm lever Mode SW No 9 guide S T slider Pinch lever Tension lever Cassette holder FL cam gear Cam slider Fig 8 14 shows each mode and mechanism status in each mode concerned with the rotation of the FL cam gear or cam slider shift The mechanism operates as shown in Fig 8 13 according to the timing chart in Fig ...

Страница 140: ...lever T brake soft Idle lever assembly S brake off Tension arm S slider assembly Pinch assembly Loading motor FL cam gear T loading lever assembly S loading lever assembly Loading drive gear Tension drive lever S brake T brake Pinch drive lever Joint gear 2 Cam slider Joint gear 1 FL cam gear Loading motor Bottom View Top View ...

Страница 141: ...VCR Deck Operating Description 8 12 Samsung Electronics Fig 8 14 Mecha Timing Chart ...

Страница 142: ...ng REW The small load is given to S REEL DISK and no load is given to T REEL DISC 4 FF REW 2 This mode is performed when Œ The tape load is large during performing FF The tape load is small during performing REW and reducing speed No load is given to S REEL DISK and the small load is given to T REEL DISK Cf According to acceleration deceleration and the location of tape tension control which is ca...

Страница 143: ...MAIN BRAKE STOP 2 The large load is given to S REEL DISC Fig 8 18 T BRAKE 1 OFF BRAKE PLAY FF REW 1 T BRAKE is detached from T REEL DISC completely So T REEL DISC is free Fig 8 19 2 SOFT BRAKE UNLOADING Completion STOP 1 FF REW 2 The small load is given to T REEL DISC ...

Страница 144: ...Deck Operating Description Samsung Electronics 8 15 Fig 8 20 3 REVERSE SEARCH BRAKE RPS The medium load is given to T REEL DISC Fig 8 21 4 MAIN BRAKE on the loading STOP 2 The large load is given to T REEL ...

Страница 145: ... and the cam slider slides after operation of the cassette holder Then the mode switch also rotates synchronized with the cam slider and outputs a signal corresponding to each mode This signal is transmitted to the microcomputer and the microcomputer stops the cam slider at a specified angle thus establishing each mode The IC601 controls Capstan Motor Drive IC for each mode to make the loading mot...

Страница 146: ...ver assembly is enabled to be engaged with both S and T reel discs 3 When a cassette is inserted the lock lever of cassette holder is released from the stopper the cassette holder moves the FL arm lever rotates and the FL Drive Slider slides thereby closing the start sensor 4 IC601 controls Capstan Motor Drive IC to rotate the loading motor in forward direction and move the cassette holder At the ...

Страница 147: ...es the position II loading unloading modes the mechanism enters the loading status and operates as described below 1 S T sliders are moved through the loading drive gear and trun on the tension post 2 The No 9 guide is loaded 3 The pinch roller is loaded up to front of the capstan 4 The head cleaner is actuated during loading operation 5 The S soft brake is actuated 4 When the cam slider passes th...

Страница 148: ...essed in the stop mode the mechanism enters the eject mode 2 IC601 controls cylinder motor drive IC to make the cylinder motor rotates 3 IC601 makes the loading motor rotate in the reverse direction and shifts the cam slider 1 The mechanism components move in the reverse direction against the loading operation 4 When the cam slider reaches the position II IC601 makes the capstan motor rotate in th...

Страница 149: ...e stop mode position V and each motor stops 2 The mechanism status is as follows 1 The S T guide rollers are in the loading status 2 The pinch roller is kept away from the capstan 3 The tension post is shifted to the reel disc side That is the band brake is released from the ON status and the back tension is also released 4 The S T soft brakes are being applied Fig 8 25 Stop Mode Position V ...

Страница 150: ...capstan driving force is directly transmitted to the reel disc 5 Brakes for the reel discs are as follows Œ VI position FF REW 1 mode S Brake soft brake T Brake off VII position FF REW 2 mode S Brake off T Brake soft brake 3 IC601 makes the capstan motor rotate in the forward direction and the idle gear transmits the rotation to the S T reel discs to take up the tape 5 FF REW to STOP mode 1 When t...

Страница 151: ...he position IV The mechanism works as follows 1 The pinch roller moves toward the capstan side and press fits the capstan 2 The No 9 guide is loaded once and then returned immediately 3 The tension post touches the tape the band braking force is applied and the tension servo mechanism works 4 The clutch holder assembly enters clutched condition 5 S T brakes are released 4 IC601 makes the capstan r...

Страница 152: ...5 In the slow mode the capstan motor rotates continuously in the intermittent driving FPS mode 1 When the FF button is pressed in the playback mode the mechanism enters the FPS mode forward picture search The cam slider is in the position IV playback mode the cylinder motor is rotating and the capstan motor is rotating in the forward direction 2 IC 601 controls the audio circuit to actuate the aud...

Страница 153: ...toped for 250ms the capstan motor is rotated in the reverse direction for a constant time and the idle gear is swung toward the S reel disc side Then the loading motor rotates in reverse direction and shifts to the position III RPS mode When the cam slider reaches the position III RPS mode the loading motor stops The mechanism status is as follows 1 The No 9 guide is loaded 2 The tension post is s...

Страница 154: ...ontrols the audio circuit and video circuit to set the record enable mode 4 Recording mute is released thus setting the recording status The CTL signal is output for recording REC PAUSE mode 1 When PAUSE button is pressed in the REC mode the mechanism enters the REC pause mode 2 IC601 controls the audio circuit and the video circuit and releases the record enable mode and performs the rewinding fo...

Страница 155: ...Audio DAC IC701 PT6959 LED Drive DT701 VIC1 LA73054 Video Amp 6CH S W AUDIO L R AUDIO L R ZIC3 MBM29LV800BA IMB Flash Memory ZIC8 TC74VHCT125 Level Shifter SIC1 S5L1455X DVD CD Processor Digital IC802 BU4053 Output Signal Switch IC501 LA72646 Hi FI Audio Processor IC301 LA71750EM Video Signal Processor IC601 uPD790006GF VCR Main Micom AUDIO L A V Common VIDEO AUDIO R Front A V Jack Optical ZIC2 64...

Страница 156: ...Samsung Electronics 11 1 11 Wiring Diagram ...

Страница 157: ...ted Note Special note Most semiconductor devices are electrostatically sensitive and therefore require the special handling techniques described under the electrostatically sensitive ES devices section of this service manual Note Do not use the part number shown on this drawing for ordering The correct part number is shown in the parts list may be slightly different or amended since this drawing w...

Страница 158: ...Schematic Diagrams 12 2 Samsung Electronics 6 1 S M P S ...

Страница 159: ...Schematic Diagrams Samsung Electronics 12 3 6 2 Power Drive ...

Страница 160: ...Schematic Diagrams 12 4 Samsung Electronics DT701 6 3 Display Function ...

Страница 161: ...Schematic Diagrams Samsung Electronics 12 5 6 4 System Control Servo ...

Страница 162: ...Schematic Diagrams 12 6 Samsung Electronics 6 5 A V ...

Страница 163: ...Schematic Diagrams Samsung Electronics 12 7 6 6 Hi Fi ...

Страница 164: ...Schematic Diagrams 12 8 Samsung Electronics 6 7 A2 NICAM ...

Страница 165: ...Schematic Diagrams Samsung Electronics 12 9 6 8 SECAM Option ...

Страница 166: ...Schematic Diagrams 12 10 Samsung Electronics 6 9 OSD VPS PDC ...

Страница 167: ...Schematic Diagrams Samsung Electronics 12 11 6 10 TM ...

Страница 168: ...Schematic Diagrams 12 12 Samsung Electronics 6 11 Input Output ...

Страница 169: ...Schematic Diagrams Samsung Electronics 12 13 6 12 DVD AV Decoder ...

Страница 170: ...Schematic Diagrams 12 14 Samsung Electronics 6 13 DVD Servo ...

Страница 171: ...Schematic Diagrams Samsung Electronics 12 15 6 14 DVD Audio Video ...

Страница 172: ...ower with in normal value is the SMPS to Main connector properly connected End repairs Check power and front connector Check the circuity around the clock Check the circuity around IC601 reset Check the soldering around the IC601 Change IC701 NO NO Key operatious such as STOP PLAY OPEN are normal Check the circuity around the swich check the condition of commmunication with Main Micom IC601 11 SCL...

Страница 173: ...ATE IN PLAY MODE CHECK TIMER CHECK IC601 XT602 SEE VIDEO MISSING IN EE MODE NO NO NO YES NO PB VIDEO SEE VIDEO MISSING IN PLAY MODE NO YES YES YES DOES NOT OPERATE OR OPERATES BUT STOP SOON YES VCR Section LOAD A TAPE AND PRESS PLAY BUTTON TURN VCR POWER ON MECHANISM DOESN T OPERATE IN PLAY MODE TAPE LOADING OPERATION LOAD IC601 75 LOW CYLINDER ROTATION SW 25Hz IC601 24 CYL FG PG IC601 97 CHECK CY...

Страница 174: ... PT601 PT602 SEE CAPSTAN DOES NOT ROTATE NO DC STOP MODE YES PULSE YES A RECORD MODE DOESN T OPERATE PLAY OPERATION LOAD VCR WITH A BLANK TAPE AND PRESS RECORD BUTTON REC MODE SAFETY TAB D REC A H IC601 68 SEE AUDIO MISSING IN RECORD MODE CHANGE SW602 CHECK IC601 CHANGE TAPE SEE PLAY MODE DOESN T OPERATE EJECT NO NO YES NO REC VIDEO SEE VIDEO MISSING IN RECORD MODE NO YES YES YES YES VCR Section ...

Страница 175: ...CAPSTAN MOTOR ROTATION SEE CAPSTAN DOES NOT ROTATE SEE MECHANISM DOES NOT OPERATE IN PLAY MODE YES F FWD ROTATE CHECK MECHANISM VCR Section FWD SEARCH DOESN T OPERATE PLAY OPERATION PRESS F FWD FOR FORWARD SEARCH CHECK IC601 CHECK CAPSTAN MOTOR IS CAPSTAN SPEED CHANGED SEARCH OPERATION NOISE BAR LOCKING END ADJUST A CE HEAD CHANGE DECK CHANGE IC601 SEE PLAY DOESN T OPERATE NO NO NO YES NO CONTROL ...

Страница 176: ...S IC601 38 LOW 0V IC601 39 HIGH 5V IC601 38 HIGH 5V IC601 39 LOW 0V CHECK CASSETT LOADING MECHANISM YES YES NO CN604 8pin 12V YES NO YES VCR Section PLACE VCR IN STOP MODE CHANGE IC301 CHECK TM BLOCK TUNER MODE OPERATION VIDEO MISSING IN EE MODE IC301 61 VIDEO OUT NO NO NO IC802 13 VIDEO IN YES YES IC802 14 VIDEO OUT YES CHECK Q811 R844 NO CHECK C355 NO NO IC301 48 CHECK IC601 NO IC301 68 CLOCK 69...

Страница 177: ...K REC FM signal CHECK CN301 CONNECTION NO YES VCR Section VIDEO MISSING IN PLAY MODE VIDEO EE MODE OPERATION PLACE THE VCR PLAY MODE CHANGE IC301 CHECK IC6P01 Q6P01 R6P10 CHECK VIDEO HEAD CHECK Q301 C395 CHECK IC601 24 CHECK VIDEO OUT LINE SEE PAGE 6 6 VIDEO MISSING IN EE MODE NO YES YES NO YES YES YES VIDEO FM IC301 21 VIDEO IC301 78 IC301 65 VIDEO SIGNAL IC6P01 19 VIDEO SIGNAL IC301 61 NO H D SW...

Страница 178: ...EC LINE SEE PAGE 9 6 VIDEO MISSING IN RECORD MODE NO NO NO YES YES YES CHECK XT301 CHANGE XT301 NO NO CHANGE IC301 COLOR MISSING IN PLAY MODE FM ENV IC301 25 COLOR MONITOR IC301 58 COLOR KILLER IC301 33 2V COLOR ROTERY IC301 57 CHANGE IC301 CHECK IC301 27 34 XT301 CHECK IC601 29 SEE PAGE 9 7 VIDEO MISSING IN PLAY MODE NO NO NO NO YES YES YES YES VCR Section CHECK IC301 61 ...

Страница 179: ...L6P05 C6P04 C6P05 YES NO YES YES NO VCR Section PACE VCR IN STOP MODE BLUE MISSING IN STOP MODE CHANGE IC601 SELECT LINE MODE WITHOUT INPUT SIGNAL IC601 72 H CHECK IC6P01 8 TO IC601 72 NO YES YES CHECK IC6P01 IC6P01 9 10 11 STB CLK DATA CHECK IC601 6 7 8 NO YES IC6P01 8 H SYNC JUDGE VIDEO SIGNAL IC6P01 19 NO CHECK OSD VIDEO IN LINE YES YES NO VCR Section ...

Страница 180: ...E IC501 NO CHECK C851 C852 L803 L804 TUNER YES YES YES YES IC501 78 80 AUDIO SIGNAL CHECK IC501 38 39 CLK DATA IC501 51 53 AUDIO SIGNAL INPUT IC801 1 3 AUDIO SIGNAL YES NO VCR Section CHECK IC801 NO MISSING AUDIO IC501 7 69 AUDIO SIGNAL IC501 26 AUDIO FM CHECK CYLINDER CHANGE IC501 CHECK L504 C512 R503 C513 CHANGE IC501 CHECK AUDIO MISSING IN EE MODE AUDIO MISSING IN REC MODE MONO HIFI MONO NO NO ...

Страница 181: ...IC301 10 AUDIO SIGNAL IC301 100 AUDIO FM SIGNAL IC301 5 MIX SIGNAL AUDIO 70KHz CN3A01 4 OSCILLATION NO CHECK AUDIO MISSING IN PB MODE CHECK PB MODE CHECK A CE HEAD MONO NO CHECK AUDIO MISSING IN EE MODE PLACE THE VCR IN PB MODE CHANGE IC501 AUDIO MISSING IN PB MODE CHECK L3A01 R3A25 CHANG IC301 CHECK ACE HEAD C3A16 AND CHANGE IC301 AUDIO SELECT IC501 78 80 AUDIO FM MIXED CHECK IC501 40 A H D SW CH...

Страница 182: ... CN604 1 NO NO NO YES YES YES VCR Section CAPSTAN DOES NOT ROTATE PLACE THE VCR IN PLAY MODE CN604 2 15V CN604 3 AL 5V CN604 9 3 2V CN604 5 2 6V CN601 3 OUTPUT PWM IC601 10 OUTPUT PWM CHECK CAPSTAN MOTOR CHECK R660 CHECK R609 CHANGE IC601 CHECK IC601 CHECK B IN THE POWER BLOCK CHECK PC5V 5V AT LINE IN THE POWER BLOCK NO NO NO NO YES NO YES NO YES YES YES YES VCR Section ...

Страница 183: ...nics DRUM DOES NOT ROTATE CN604 6 12V CN604 3 5V CN604 12 2 5V CHECK CYLINDER MOTOR IC601 5 9 DRUM CTL L CHECK PC5V LINE CHECK AL12V 12V AT LINE IN THE POWER BLOCK NO NO NO YES YES YES CHANGE IC601 NO CHECK R608 C659 R617 C661 VCR Section ...

Страница 184: ...output are normal Check open state from SIC3 to pick up Check RIC1 and A B C D input Check SIC3 Yes Yes No No A DVD Section No pick up home positing SIC1 34 SLD output is normal 1 7V 1 8V Check the Sled Motor and connection Check SIC1 Yes No SLED SLED SIC3 32 33 output are normal Check SIC3 Yes No SLD Waveform DVD Section ...

Страница 185: ...fference into 10ohm DVD Section No Search Operation MIRR SIC1 37 output is normal Actual velocity occurs at SIC1 15 terminal Actual velocity occurs at SIC3 32 33 terminal Check RIC1 peripheral circuit RFAGCO RIC1 73 output level is normal Check SIC1 peripheral circuit Check SIC3 peripheral circuit No No No No Yes occurs in search range Focus On Yes Yes Yes A See Fine Seek Check No Yes Check pick u...

Страница 186: ...l Check DCN1 and pick up Check MECHA Check RIC1 31 terminal Check SIC3 peripheral circuit Yes Yes Yes Yes Yes Yes Yes No No No No No No No TRD Waveform DVD Section Abnormal rotation of disc motor Input of RF SUM signal is normal SIC1 52 SPD output is normal SIC1 28 After resoldering SIC1 SIC3 7 FG output is normal SIC3 44 signal MON is H Check or replace disc motor Check SIC1 MIC1 Check SIC3 solde...

Страница 187: ...nnector Yes Yes No No OPEN Waveform DVD Section CD VCD DVD L R output error Mixed Audio output Normal DATA 0 is input in AIC4 2 CHECK AIC4 7 8pin output is normal Check PCB peripheral Pattern shot Check ZIC1 184 output Check ZIC1 179 CD VCD 16 9344MHz DVD 18 432MHz Yes Yes No No AOP4 1 7 output is normal Check AOP1 peripheral circuit Yes No Base terminal level of AQ1 AQ3 are L Check VCR MICOM mate...

Страница 188: ...is normal Check the connection between VIC1 and S JACK Yes No Yes Check the connection of s video cable DVD Section Y Pr Pb output error Did the screen select with the component VIC1 18 21 24pin output is normal Change a sceen set Check the circuit ZIC1 and VIC1 Yes No No JACK1 output level is normal Check the connection between VIC1 and JACK1 Yes No Yes Check the connection component cable DVD Se...

Страница 189: ...n 5 in VIC1 is in high stste Yes Check the connection netween pin 133 in ZIC1 and VIC1 Check the connection betwen VIC1 1 and PDS52 Check the connection between PDS52 and pin 1 in VIC1 Check the soldering of VIC1 No No Check the connection between VIC1 and output jack Pin of VDDP in ZIC1 has normal level Check the connection between pin 1 in PCNS1 and pin 1 in ZIC5 Yes No Peak to peak voltage leve...

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