SAMSUNG SV5000WXAA Service Manual

VIDEO CASSETTE RECORDER

SV-7000W SV-5000W

SERVICE

1. Precautions

2. Reference Information

3. Product Specifications

4. Disassembly and Reassembly

5. Troubleshooting

6. Alignment and Adjustment

7. Exploded View and Parts List

8. Electrical Parts List

9. Block Diagram

10. PCB Diagrams

11. Wiring Diagram

12. Schematic Diagrams

Manual

VIDEO CASSETTE RECORDER CONTENTS

For mechanical disassembly and adjustment, refer to the “Mechanical Manual” (DX-9R AC68-00001A).

SERVICE MANUAL SV-7000W/SV-5000W

ELECTRONICS

Printed in Korea

AC68-00434A

SV-7000W

SV-5000W

Samsung Electronics 1-1

1. Precautions

1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.

2. When reinstalling the chassis and its assemblies, be sure to restore all pretective devices, including : control knobs and compartment covers.

3. Make sure that there are no cabinet openings through which people--particularly children

--might insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers.

If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer.

4. Leakage Current Hot Check (See Fig. 1-1) : Warning : Do not use an isolation transformer during this test. Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

Fig. 1-1 AC Leakage Test

5. With the unit completely reassembled, plug the AC line cord directly the power outlet. With the unitÕs AC switch first in the ON position and then OFF, measure the current between a known erath ground (metal water pipe, conduit, etc.) and all exposed metal parts, including : antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed

0.5 milliamp. Reverse the power-plug prongs in the AC outlet and repeat the test.

6. Antenna Cold Check : With the unitÕs AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector.

7. Some semiconductor (Òsolid stateÓ) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.

8. Immediately before handling sny semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging Wrist-strap device. (Be sure to remove it prior to applying power--this is an electric shock precaution.)

9. Design Alteration Warning : Never alter or add to the mechanical or electrical design of this unit. Example : Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturerÕs warranty.

10. Never defeat any of the B+ voltage interlocks.

Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

DEVICE UNDER

TEST

(READING SHOULD

NOT BE ABOVE

0.5mA)

LEAKAGE CURRENT

TESTER

EARTH

GROUND

TEST ALL

EXPOSED METER

SURFACES

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

2-WIRE CORD

Precautions

1-2 Samsung Electronics

11. Always connect a test instrumentÕs ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrumentÕs ground lead last.

12. Observe the original lead dress, especially near the following areas : Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, outof-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.

13. Product Safety Notice : Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement component differs from the original--even if the replacement is rated for higher voltage, wattage, etc.

Components that are critical for safety are indicated in the circuit diagram by shading, ( or ). Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

Samsung Electronics 2-1

2. Reference Information

2-1 Important Service Guide

2-1-1 Mode switch (Program Switch) assembly point

1) When installing the assÕy full deck on the Main PCB, be sure to align the assembly point of mode switch.

2-1-2 How to eject the cassette tape

(If the unit does not operate on condition that tape is inserted into housing ass’y)

1) Remove the Holder Worm Œ and the gear worm ´. (See Fig. 2-2)

2) Turn the Gear Worm Wheel ˇ counterclockwise in the direction of arrow with screw driver. (See Fig. 2-2)

3) When Slider S, T are approached in the position of unloading, rotate holder Clutch counterclockwise after inserting screw driver in the hole of frameÕs bottom in order to wind the unwounded tape. (Refer to Fig. 2-3) (If you rotate Gear Worm Wheel continuously when tape is in state of unwinding, you may cause a tape conta mination by grease and tape damage. Be sure to wind the unwounded tape in the state of set horizontally.)

4) Rotate Gear Worm Wheel ˇ counterclockwise using screw driver again up to the state of eject mode and then pick out the tape. (Refer to Fig. 2-2)

Fig. 2-2 Fig. 2-3

Œ HOLDER WORM

´ GEAR WORM

SCREW DRIVER

ˇ GEAR WORM WHEEL

FRAME

ASSEMBLY POINT

Fig. 2-1

Reference Information

2-2 Samsung Electronics

2-2 Servicing Jigs and Special Tools (Only for SV-7000W )

2-2-1 Servicing Jig

E/Cable

Jig Item

68140-500-104

Part No.

Use for Timer PCB (CN703, CN704) Joint PCB (CN8J01, CN8J02)

Use

2-2-2 How to Connection

E/CABLE

This is the same as the E/CABLE-2 used for Model SV-4000W.

Fig. 2-4

Fig. 2-5

Samsung Electronics 3-1

3. Product Specifications

Design and specifications are subject to change without notice.

Operation Description

Recording system Rotary head azimuth recording, luminance signal FM recording system

Crominance signal down converted phase shift recording system (NTSC, PAL, PAL-M) Chrominance signal down converted direct recording system (MESECAM)

Chrominance signal 1/4 frequency countdown direct recording system (SECAM) Color system NTSC3.58, NTSC4.43, PAL, PAL-M, PAL-N, SECAM Tuning system SV-7000W/5000W ; B/G, D/K, I, M, N, L SV-5000W NTSC System ; B/G, D/K, I, M, N RF out

SV-7000W/5000W ; G/I/K/M/L, UHF CH21-CH69 SV-5000W NTSC System ; G/I/K/M, UHF CH21-CH69 Tape recording/playback NTSC, PAL, PAL-M, SECAM, MESECAM Tape speed NTSC 33.35mm/sec (standard recording : SP)

PAL-M 11.12mm/sec (three times recording : SLP)

PAL 23.39mm/sec (standard recording : SP)

MESECAM

11.69mm/sec (double speed recording : LP)

SECAM Tape format VHS type video tape, S-VHS type video tape (Playback only) Recording time Maximum 8 hours (with a T-160 tape or E-240tape) Rewinding time within 3 minutes (high speed rewinding, T-120 or E-180 tpae) Video input 1.0Vp-p (unbalanced) 75 ohm Video output 1.0Vp-p (unbalanced) 75 ohm Video S/N Above 43dB (standard recording) Resolution Above 220 (standard recording NTSC), 240 (standard recording PAL) Audio input -8dBm, 47 Kohm unbalanced Audio output -8 +/- 3 dBm, 1 Kohm unbalanced Audio S/N Above 39dB (Mono), 68dB (Hi-Fi) Audio frequency characteristics 20Hz-20KHz Rated voltage 100V~240V AC, 100V AC (JAPAN) Rated frequency 50/60Hz Power consumption ARP. 24 watts on recording ; 8 watts off Working ambient temperature 41°F-104°F (5°C-40°C) Installation conditions Operation position : Horizontal, Relative humidity : Below 80% Outside dimensions SV-7000W : Width 465mm X Length 310mm X Height 98mm

SV-5000W : Width 430mm X Length 295mm X Height 98mm Weight SV-7000W : 4.8Kg SV-5000W : 4.3Kg

Product Specifications

3-2 Samsung Electronics

MEMO

Samsung Electronics 4-1

4. Disassembly and Reassembly

4-1 Cabinet Assembly

Note : Disassemble in the order shown. Reassemble in reverse order.

4-1-1 Cabinet Top removal

"B"

"A"

´ REMOVE 1 SCREW. (BH;5-4X16-BLOCK)

ˇ RELEASE 2 HOOKS.

Œ REMOVE 1 SCREW.

(BH;5-4X16-BLOCK)

"C"

¨ REMOVE THE PANEL-SIDE(L) IN THE DIRECTION OF ARROW "A".

ˆ REMOVE 1 SCREW.

(BH;5-4X16-BLOCK)

Ø RELEASE 2 HOOKS.

∏ REMOVE THE PANEL-SIDE(R) IN THE DIRECTION OF ARROW "B".

” LIFT UP THE CABINET-TOP

IN THE DIRECTION OF ARROW "C".

Œ REMOVE 5 SCREWS. (BH;5-4X16-BLOCK)

´ LIFT UP THE CABINET-TOP IN THE DIRECTION OF ARROW .

<SV-7000W>

<SV-5000W>

Fig. 4-1 Cabinet Top removal

Disassembly and Reassembly

4-2 Samsung Electronics

4-1-2 Bottom Cover removal

Œ REMOVE 2 SCREWS. (BH;2-3X10-YELLOW)

ˇ RELEASE 3 TABS.

¨ RELEASE 3 TABS.

"B"

"A"

ˆ LIFT UP THE BOTTOM-COVER IN THE DIRECTION OF ARROW "B".

´ REMOVE THE DECORATION-LEG IN THE DIRECTION OF ARROW "A".

Fig. 4-2 Bottom Cover removal

Disassembly and Reassembly

Samsung Electronics 4-3

4-1-3 Ass’y Front Panel removal

Œ RELEASE 4 HOOKS.

´ RELEASE 3 HOOKS.

(Top view)

(Bottom view)

Fig. 4-3 Ass’y Front Panel removal

Disassembly and Reassembly

4-4 Samsung Electronics

4-1-4 Ass’y Timer removal

Note : Take extreme care not to damage the PCB when removing it.

Fig. 4-4 Ass’y Timer removal

Œ RELEASE 6 HOOKS.

"A"

´ REMOVE THE ASS'Y FUNCTION IN THE DIRECTION OF ARROW "A".

Œ REMOVE HOLDER PCB.

´ LIFT UP THE ASS'Y DIGITAL IN THE DIRECTION OF ARROW.

4-1-5 Ass’y Digital removal

Fig. 4-5 Ass’y Digital removal

Disassembly and Reassembly

Samsung Electronics 4-5

4-1-6 Chassis Unit removal

Fig. 4-6 Chassis Unit removal

Œ REMOVE 2 SCREWS.

´ REMOVE BRACKET-FRAME.

ˇ REMOVE 3 SCREWS.

¨ LIFT THE ASS'Y FULL DECK UP.

ˆ REMOVE 1 SCREW.

Ø RELEASE 2 TABS.

∏ LIFT THE ASS'Y MAIN PCB UP TO REMOVE.

Disassembly and Reassembly

4-6 Samsung Electronics

4-2 Circuit Board Locations

TIMER PCB

DIGITAL PCB

I/O PCB

MAIN PCB

A2/NICAM PCB

(STEREO/BILINGUAL)

Fig. 4-7 Circuit Board Locations

Samsung Electronics

6-1

6. Alignment and Adjustment

6-1 Reference

1) X-Point (Tracking center) adjustment, “Head switching adjustment” and “NVRAM option setting” can be adjusted with remote control.

2) When replacing the Micom (IC601) and NVRAM (IC605 ; EEPROM) be sure to adjust the “Head switching adjustment” and “NVRAM option setting”.

3) When replacing the cylinder ass’y, be sure to adjust the “X-Point” and “Head switching adjustment”.

4) Among Samsung VCR remote control used for adjustment as a accessory, only the remote control that has figures buttons (0 ~ 9) is available for all adjustment regardless of chassis.

5) How to adjustment.

- Press the “TEST” (SV-7000W ; SW711, SV-5000W ; SW718) button on Timer PCB to set the adjustment mode.

- If the corresponding adjustment button is pressed, the adjustment is performed automatically.

- If the adjustment is completed, be sure to turn the power off.

6-1-1 Location of adjustment button of remote control

Fig. 6-1

VCR POWER

EJECT

INDEX REC.SPEED CLK/COUNT PICTURE TIMER

ART INPUT

CLR/RST

100

DISPLAY MONITOR A.DUB

REC

P/STILL

INPUT SYSTEM

OUTPUT SYSTEM

AUTO MENU

REV

FWD

STOP

STROBE AUDIO

Remote Control for adjustment is not supplied as a Service Jig.

X-Point (Tracking Center) Adjustment

Head Switching Adjustment

NVRAM Option Setting

6-2

Samsung Electronics

Alignment and Adjustment

6-1-2 Test point location for adjustment mode setting

Fig. 6-2

(TIMER PCB ; Top View)

(F/TIMER PCB ; Top View)

SV-7000W

SV-5000W

Alignment and Adjustment

Samsung Electronics

6-3

6-2 Mechanical Adjustment

Note : Refer to the Mechanical Manual ÒDX-9R (AC68-00001A)Ó for the adjustment and confirmation of

assÕy full deck.

6-2-1 The number and position of test point

Fig. 6-3 Location of Test point (Main PCB-Top View)

TP01

ENVELOPE

AUDIO OUTPUT

VIDEO OUTPUT

H'D S/W-Trigger

CONTROL PULSE

6-2-2 ACE Head Position (X-Point) Adjustment

(See the 2-2-1(d) ACE Head Position (X-Point) Adjustment on page 2-2 of the Mechanical Manual)

1) Playback the alignment tape (Color bar).

2) Press the ÒTESTÓ (SV-7000W ; SW711, SV-5000W ; SW718) button on Timer PCB to set the adjustment mode. (See Fig. 6-2)

3) Press the Ò5Ó button of remote control then adjustment is operated automatically. (See Fig. 6-1)

4) Connect the CH-1 probe to TP01 (Envelope) the CH-2 probe to TP01 (HÕD 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.

6) Turn the Power off.

6-4

Samsung Electronics

Alignment and Adjustment

6-3 Head Switching Point Adjustment

1) Playback the alignment tape.

2) Press the ÒTESTÓ (SV-7000W ; SW711, SV-5000W ; SW718) button on Timer PCB to set the adjustment mode. (See Fig. 6-2)

3) Press the ÒREC.SPEEDÓ button of remote control then adjustment is operated automatically. (See Fig. 6-1)

4) Turn the Power off.

6-4 NTSC Skew Adjustment

1) Load the instrument with an alignment tape and playback the color bar signal (NTSC SP color bar tape).

2) Connect CH-1 scope probe (1V/div, 50µs/div.).

3) Connect CH-2 scope probe to video terminal of J4303 (I/O PCB).

4) Set the VCR to RPS (Reverse picture search) or FPS (Forward picture search) mode.

5) Adjust VR4301 (I/O PCB) so that the 100% white and pedestal is as flat as possible.

CORRESPOND TO LEVEL

(Before Adjustment) (After Adjustment)

Fig. 6-4 I/O PCB (Top View)

Alignment and Adjustment

Samsung Electronics

6-5

6-5 NVRAM Option Setting

1) Press the ÒTESTÓ (SV-7000W ; SW711, SV-5000W ; SW718) button on Timer PCB to set the adjustment mode. (See Fig. 6-2)

2) Press the ÒMENUÓ button on the remote control about 5 seconds then option setting display is appeared. (See Fig. 6-5)

3) Select the option number (See Table 6-1) of corresponding model with Ò Ò and Ò Ò button on the remote control.

4) If selecting the option number is completed, press the Ò Ó button of remote control. (If ÒSTOPÓ button is pressed, the selected number is changes reversed color. ; See Fig. 6-5)

5) Press the ÒOKÓ button of remote control again to store the option number. (ÒPLEASE WAITÓ is displayed for a second as shown Fig. 6-6 and this setting is completed.)

6) Turn the Power off.

1) NVRAM Option is adjusted at production line basically.

2) In case Micom (IC601) and NVRAM (IC605 ; EEPROM) is replaced, be sure to set the corresponding option number of the repaired model. (If the option is not set, the unit is not operated.)

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

OPTION DIODE

CNG : SAVE : OK

Fig. 6-5

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

OPTION DIODE

CNG : SAVE : OK

PLEASE WAIT

Fig. 6-6

MODELS TV SYSTEM OPTION NUMBER

SV-7000W NTSC/PAL 1, 2, 3, 4, 5, 6, 9, 10, 11, 13, 14, 15, 16

SV-5000W

NTSC 1, 2, 3, 4, 6, 8, 13, 14, 15

PAL 1, 2, 3, 4, 5, 9, 10, 11, 13, 14, 15

6-6

Samsung Electronics

Alignment and Adjustment

MEMO

CHECK

AL 5.8V AT PIN

17 OF PT01

CHECK

AL 15 AT PIN

19 OF PT01

CHECK

AL 9V AT PIN

21 OF PT01

CHECK

AL 38V AT PIN

20 OF PT01

CHECK AND CHANGE

D33, C34, L33, C35

CHECK AND CHANGE

L31, D32, C32, L32, C33

CHECK AND CHANGE

L30, D31, C31

CHECK AND CHANGE

D30, C30

YES

Samsung Electronics 5-1

5. Troubleshooting

S.M.P.S.

INOPERATIVE

CHECK

AC CORD

CHECK

VOLTAGES AT PINS

2,6,8,10

OF PT01

CHECK

VOLTAGES

AT PIN 2 OF

PT1SD1

CHECK

VOLTAGES AT

IC01

CHECK R10

AND SECOND CIRCUITS

CHECK AND CHANGE

R10, R11, R12, R13, R14,

D10, R17

CHECK AND CHANGE

D01, D02, D03, D04, D05,

F01

CHANGE AC CORD

YES

Alignment and Adjustment

5-2 Samsung Electronics

LOAD A TAPE AND

PRESS PLAY BUTTON

TURN VCR POWER ON

MECHANISM DOESN'T

OPERATE IN PLAY MODE

TAPE LOADING

OPERATION

(LOAD)

IC601-38:HIGH

IC601-39:LOW

(END SENSOR)

IC601-76

CYLINDER

ROTATION

NTSC : SW 30Hz

PAL : SW 25Hz

IC601-24

CYL FG.PG

IC601-96.97

SEE

(CYLINDER DOES

NOT ROTATE)

CHECK

START/END SENSOR

IC601

NO NO

LOW

YES

HIGH

YES

CHECK TAPE

CHECK IC602

PLAY MODE

INOPERATIVE

EE-VIDEO

INSERT THE CASETTE

TAPE RECORDED BY

ANOTHER VCR AND

PRESS PLAY BUTTON

PLAY

INDICATOR

IN THE DISPLAY

PRESS PLAY KEY

IN REMOTE

CONTROL

MECHANISM

OPERATION

SEE (PB VIDEO) AUDIO MISSING

IN PLAY MODE

SEE

(MECHANISM DOES NOT

OPERATE IN PLAY MODE)

CHECK TIMER

CHECK

IC601, XT602

SEE

VIDEO MISSING

IN EE MODE

NO NO

YES

PB-VIDEO

SEE

VIDEO MISSING

IN PLAY MODE

YES

DOES NOT OPERATE

OR OPERATES

BUT STOP SOON

YES

Alignment and Adjustment

Samsung Electronics 5-3

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)

IC601-1

FULL ERASE (H)

IC601-68

SEE

(AUDIO MISSING IN

RECORD MODE)

CHANGE RS601

CHECK IC601

CHANGE TAPE

SEE

(PLAY MODE

DOESN'T OPERATE)

EJECT NO

YES

REC-VIDEO

SEE

(VIDEO MISSING IN

RECORD MODE)

YES

CAPSTAN

ROTATION

(S.T REEL)

IC601-98.99

PROG.SW STATE

IC601-63.64.65

CHANGE IC601

CHECK

LOADING MOTOR

MECHANISM OR SW601

TAKE UP REEL SENSOR

SUPPLY REEL SENSOR

(PT601.PT602)

SEE

(CAPSTAN DOES NOT

ROTATE)

STOP MODE

YES

PULSE

YES

Alignment and Adjustment

5-4 Samsung Electronics

LOAD A TAPE

REWIND DOESN'T

OPERATE

F.FWD

OPERATION

PRESS REWIND

BUTTON

REW

INDICATOR IN

THE DISPLAY

PRESS REW

KEY IN REMOTE

CONTROL

MECHANISM

STATE

IC601-93.98.99

CHECK

MECHANISM

CHECK TIMER

CHECK

IC601. XT602

SEE

(FAST FORWARD

DOESN'T WORK)

NO NO

YES

STOP

DOES CAPSTAN

MOTOR

ROTATE?

CHECK

IC601-25

(CM F/R)

SEE

(MECHANISM DOES NOT

OPERATE IN PLAY MODE)

YES

F.FWD

YES

LOAD TAPE AND

PRESS F.FWD BUTTON

FAST FORWARD

DOESN'T OPERATE

F.FWD

INDICATOR IN

THE DISPLAY

PRESS FF

KEY IN REMOTE

CONTROL

MECHANISM

STATE

IC601-93.98.99

CHECK

MECHANISM

CHECK TIMER

CHANGE IC601, XT602

NO NO

YES

STOP

CAPSTAN MOTOR

ROTATION

SEE

(CAPSTAN DOES NOT

ROTATE)

SEE

(MECHANISM DOES NOT

OPERATE IN PLAY MODE)

STOP

YES

F.FWD

ROTATE

Alignment and Adjustment

Samsung Electronics 5-5

REV. SEARCH DOESN'T

OPERATE

PLAY

OPERATION

PRESS REWIND BUTTON

FOR REV. SEARCH

CHECK CAP F/R LINE

IS CAPSTAN

SPEED CHANGED?

OPERATION

FWD SEARCH

END

CHECK IC601

CHANGE DECK

CHANGE IC601

SEE

(PLAY

DOESN'T OPERATE)

(PLAY MODE)

YES

CAP F/R

IC601-25

(SEARCH MODE)

YES

LOW

CHECK IC601

CHECK CAPSTAN

MOTOR

NOISE BAR

LOCKING

ADJUST

A/CE HEAD

(CONTROL PULSE)

IC601-89

YES

FWD SEARCH DOESN'T

OPERATE

PLAY

OPERATION

PRESS F.FWD FOR

FORWARD SEARCH

CHECK IC601

CHECK CAPSTAN

MOTOR

IS CAPSTAN

SPEED CHANGED?

OPERATION

NOISE BAR

LOCKING

END

ADJUST

A/CE HEAD

CHANGE DECK

CHANGE IC601

SEE

(PLAY

DOESN'T OPERATE)

YES

(CONTROL PULSE)

IC601-89

YES

Alignment and Adjustment

5-6 Samsung Electronics

PLACE VCR IN STOP

MODE

VIDEO MISSING IN

EE MODE

TUNER MODE

OPERATION

(EE INPUT

SIGNAL)

IC301-34

TUNER AND

DEMODU-

LATOR

APPLY VIDEO SIGNAL

(1Vp-p) TO VIDEO INPUT

JACK AND SET TO LINE MODE

NOTE: Location 43 series-I/O PCB

Location 3 series-Main PCB

CHECK C4362

CHECK IC4362,

R4362

CHECK IC4304

SEE PAGE 5-10

(DIGITAL BLOCK

NOT OPERATE)

CHECK AND

REPLACE

IC301

CHECK

VIDEO OUT

LINE

(VIDEO OUT)

IC301-32

YES

NO NO

VIDEO

IC4302 3~6

VIDEO

IC901-21

VIDEO

IC4305-7

VIDEO

IC4305-1

CHANGE

IC4305

CHECK

IC901

CHANGE

IC4302

VIDEO

IC4304-7

VIDEO

IC301-38

VIDEO

IC4301-7

YES

TURN THE VCR

POWER ON AND

INSERT A TAPE

PRESS EJECT BUTTON

CASSETTE LOADING

MECHANISM

DOES NOT OPERATE

TAPE DETECTED

CST IN MODE

IC601-38:HIGH(5V)

IC601-39:LOW(0V)

CHANGE IC601

CHECK

START/END SENSOR

IC601

CHECK

LM B

LINE

CHANGE IC602

NO NO

YES

IC601-39:LOW(0V)

IC601-38:HIGH(5V)

IC602-5:HIGH(5V)

IC602-6:LOW(0V)

CHECK

CST LOADING

MECHANISM

YES

IC602-8:10V

YES

Alignment and Adjustment

Samsung Electronics 5-7

VIDEO MISSING IN

PLAY MODE

VIDEO EE MODE

OPERATION

PLACE THE VCR PLAY MODE

CHANGE IC301 CHECK IC4304

CHECK

VIDEO HEAD

CHECK

Q303-E

CHECK

IC601-24

CHECK VIDEO

OUT LINE

SEE PAGE 5-6

(VIDEO MISSING IN

EE MODE)

YES

VIDEO FM

IC301-74

VIDEO

IC301-20

VIDEO

IC301-29

VIDEO

IC4304-7

VIDEO

IC4306-5,6

H'D SW

IC301-11

YES

NO NO NO

CHECK IC4306

NOTE: Location 43 series-I/O PCB

Location 3, 6 series-Main PCB

VIDEO MISSING IN

RECORD MODE

PLACE THE VCR

RECORD MODE

VIDEO EE MODE

OPERATION

FM-VIDEO

IC301-12

FM-VIDEO

IC301-84.90

IC301-30

CHECK VIDEO HEAD

CHECK IC601-68

CHANGE IC301

CHANGE

IC301

SEE PAGE 5-6

(VIDEO MISSING

IN EE MODE)

NO YES

YES

Alignment and Adjustment

5-8 Samsung Electronics

COLOR MISSING IN

PLAY MODE

FM-ENV

IC301-74

COLOR

IC301-59. 61

SW 25Hz

IC301-10

CHECK

XT3X1

XT302

XT3X2

CHANGE

IC301

CHECK IC601-29

CHANGE

XT3X1, XT3X2, XT302

CHECK Q308, C330, 328

SEE PAGE 5-7

(VIDEO MISSING IN

PLAY MODE)

COLOR

IC301-71

YES

NOTE: XT3X1 - 4.43MHz (PAL/PAL-N/SECAM/MESECAM/NT4.43

XT302 - Always (3.579545MHz)

XT3X2 - 3.575611MHz (PAL-M)

COLOR MISSING IN

RECORD MODE

(VIDEO IN)

RECORD MODE

COLOR

IC301-72

COLOR

IC301-71

CHANGE IC301

CHECK C304

CHANGE

XT3X1, XT3X2, XT302

CHECK

XT3X1

XT302

XT3X2

SEE PAGE 5-7

(VIDEO MISSING IN

RECORD MODE)

YES

NOTE: XT3X1 - 4.43MHz (PAL/PAL-N/SECAM/MESECAM/NT4.43)

XT302 - Always (3.579545MHz)

XT3X2 - 3.575611MHz (PAL-M)

Alignment and Adjustment

Samsung Electronics 5-9

PLACE THE VCR IN STOP MODE

SELECT LINE MODE

WITHOUT INPUT SIGNAL

BLUE MISSING IN

STOP MODE

CHANGE

ICD6, LD2, CD64

CHECK

IC902-13 "L",

PIN15 5V

CHECK

ICD6-2 3.3V

CHECK

ICD2-30,

BLUE SIGNAL

CHECK ICD2

CHECK ICD3

YES

CHECK

IC902 AL5V LINE

OSD PICTURE MISSING

XTAL IN

IC901-2

OSC IN

IC901-6

(STB, CLK, DATA)

IC901-9, 10, 11

CHANGE

IC901

CHECK IC601-6, 7, 8

CHECK L901, C903, C904

CHECK XT901, XT902

YES

XTAL IN: 17.734476MHz (PAL/SECAM/PAL-N)

14.318MHz (NTSC/PAL-M/NT4.43)

OSC IN: 5~10MHz

Alignment and Adjustment

5-10 Samsung Electronics

ICD2-30

OUTPUT SIGNAL

ICD8-2

"H"

CHECK

ICD8, LD2, CD64, RD1

CHECK

ICD3-22

CHECK ICD2

APPLICATION CIRCUIT

CHECK ICD3

APPLICATION CIRCUIT

CHECK ICD3, RD9

ICD3-16

27MHz

ICD2-4

27MHz

ICD1-43

INPUT SIGNAL

ICD1-32

24, 6MHz

YES

CHECK

XD1, ICD1, CD12-CD14

CHECK

RD24, CD4

YES

DIGITAL BLOCK NOT

OPERATE

THROUGH MODE

OPERATE

ICD8-2 "L"

ICD8-7

OUTPUT SIGNAL

ICD5-3, 4

OUTPUT SIGNAL

CHECK

CD60, CD61, CND2

I/O BLOCK

CHECK ICD5

APPLICATION CIRCUIT

CHECK ICD8

APPLICATION CIRCUIT

CHECK D3-22

YES

ICD8-1

INPUT SIGNAL

YES

CHECK I/O BLOCK

Alignment and Adjustment

Samsung Electronics 5-11

MISSING AUDIO

IC501-16.37

AUDIO SIGNAL

IC501-27

AUDIO FM

IC501-26

AUDIO FM

IC501-11.40

AUDIO SIGNAL

CHECK

CYLINDER

CHECK

IC501

CHECK

IC501-15.38

C508, C517 AND CHANGE IC501

CHECK

R504 AND CHANGE IC501

CHECK

C519, C505

CHECK

AUDIO MISSING

IN EE MODE

AUDIO MISSING IN

REC MODE

MONO

HIFI

MONO

NONO

YES

IC501-22.25:5V

CHECK

PC 5V LINE

YES

PLACE VCR IN STOP

MODE

AUDIO MISSING IN

EE MODE

IC501-52,61

AUDIO SIGNAL

INPUT

INPUT SELECT

MODE

IC501-49, 63

AUDIO SIGNAL

INPUT

IC501-6, 44

AUDIO SIGNAL

INPUT

IC501-57

AUDIO SIGNAL

IC501-2, 48

AUDIO SIGNAL

INPUT

CHECK

R517, R518

R509, R510

CHECK

5V, 9V LINE

CHECK

IC601

CHECK

C524, C525

R514, R516

NO AV

CHECK TM401

YES

LINE OUT

TUNER

YES

IC501-56.58

AUDIO SIGNAL

IC501-8

A. MUTE

IC501-5.45:1.9V

CHECK

R521, R540

R522, R533

CHECK

R507, R508

R519, R520

CHECK

R501, R502,

R505, R506, MTS BLOCK

YESNO

CHECK

C529

R406, R407

CHANGE

IC501

TM401-2

AUDIO SIGNAL

YES

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