Samtron SV-D91 Manuale utente

VIDEO CASSETTE RECORDER

SV-D91

SV-D41

SV-D21

SERVICE

1. Precautions

2. Alignment and Adjustment

3. Exploded View and Parts List

4. Electrical Parts List

5. Schematic Diagrams

Manual

VIDEO CASSETTE RECORDER CONTENTS

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

SAMTRON

POWER EJECT

POWER REC

REW F.F STOP

PLAY

SERVICE MANUAL SV-D91/D41/D21

Printed in Korea

AC68-00821A

IMPORTANT SERVICE GUIDE

MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT

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

ASSEMBLY POINT

Fig. 1

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 Œand the gear worm ´. (See Fig. 2)

2) Turn the Gear Worm Wheel ˇcounterclockwise in the direction of arrow with screw driver. (See Fig. 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 frame’s bottom in order to wind the unwounded tape. (Refer to Fig. 3)

(If you rotate Gear Worm Wheel continuously when tape is in state of unwinding, you may cause a tape contamination by grease and

tape damage. Be sure to wind the unwounded tape in the state of set horizontally.)

4) Rotate Gear Worm Wheel ˇcounterclockwise using screw driver again up to the state of eject mode and then pick out the tape.

(Refer to Fig. 2)

Fig. 2 Fig. 3

Œ HOLDER WORM

´ GEAR WORM

SCREW DRIVER

ˇ GEAR WORM WHEEL

FRAME

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 unit’s

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 unit’s 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 (“solid state”) 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 any 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 manufacturer’s 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 instrument’s ground lead to

the instrument chassis ground before connecting

the positive lead; always remove the instrument’s

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, out-

of-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. Alignment and Adjustment

2-1 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 “SW718 (TEST)” button on Main 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.

2-1-1 Location of adjustment button of remote control

Fig. 2-1

Q-PRO

IPC

DISPLAY

SHUTTLE

V-LOCK

CLR/RST F.ADV

INPUT INDEX TRK PROG

REPEAT

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

POWER DISPLAY

CNT.RESET SPEED

IIP/S IPC TRK

REC MENU

Head Switching Adjustment

("SPEED" Button)

NVRAM Option Setting

("MENU" Button)

X-Point (Tracking Center) Adjustment

("5" Button)

STANDBY/ON EJECT

2-2 Samsung Electronics

Alignment and Adjustment

2-1-2 SW718 (TEST) location for adjustment mode setting

Fig. 2-2 Main PCB (Top View)

PRESS

Alignment and Adjustment

Samsung Electronics 2-3

2-2 Mechanical Adjustment

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

ass’y full deck.

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

Test point : TP601 (H’D S/W -Trigger)

TP602 (Control pulse)

TP301 (Video output)

TP302 (Audio output)

TP303 (Envelope)

Fig. 2-3 Location of Test point (Main PCB-Top View)

AUDIO OUTPUT

HEAD SWITCHING

ENVELOPE

2-2-2 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 “SW718 (TEST)” button on Main PCB to

set the adjustment mode. (See Fig. 2-2)

3) Press the “5” button of remote control then

adjustment is operated automatically. (See Fig. 2-1)

4) Connect the CH-1 probe to TP303 (Envelope) the

CH-2 probe to TP601 (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.

6) Turn the Power off.

2-4 Samsung Electronics

Alignment and Adjustment

2-3 Head Switching Point Adjustment

1) Playback the alignment tape.

2) Press the “SW718 (TEST)” button on Main PCB to set the adjustment mode. (See Fig. 2-2)

3) Press the “SPEED” button of remote control then adjustment is operated automatically. (See Fig. 2-1)

4) Turn the Power off.

2-4 NVRAM Option Setting

1) Press the “SW718 (TEST)” button on Main PCB to set the adjustment mode. (See Fig. 2-2)

2) Press the “MENU” button on the remote control about 5 seconds then option setting display is appeared.

(See Fig. 2-4 and 2-5)

3) Select the option number (See Table 2-1 ; Page 2-5) of corresponding model with “FF” and “REW” button on

the remote control.

4) If selecting the option number is completed, press the “PLAY” button of remote control.

(If “PLAY” button is pressed, the selected number is changes reversed color. ; See Fig. 2-4 and 2-5)

5) Press the “OK (VCR)”, “MENU (VCP)” button of remote control again to store the option number.

(“PLEASE WAIT” is displayed for a second as shown Fig. 2-6, 2-7 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

49 50 51 52 53 54 55 56

**OPTION DIODE **

CNG : SAVE : OK

Fig. 2-4 (VCR)

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

**OPTION DIODE **

CNG : SAVE : MENU

Fig. 2-5 (VCP)

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

**OPTION DIODE **

CNG : SAVE : OK

PLEASE WAIT

Fig. 2-6 (VCR)

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

**OPTION DIODE **

CNG : SAVE : MENU

PLEASE WAIT

Fig. 2-7 (VCP)

Alignment and Adjustment

Samsung Electronics 2-5

COUNTRY MODELS OPTION NUMBER

FRANCE SV-632FT/632FG 5, 8, 12, 13, 14, 15, 16, 18, 19, 22, 23, 26, 29, 35, 38, 50, 53, 54

SV-432FT/432FS/432FG/432FB

5, 8, 12, 16, 18, 19, 22, 23, 26, 29, 35, 38, 50, 53, 54

SV-232FT/232FS/232FG/232FB

5, 16, 18, 19, 22, 23, 26, 29, 35, 38, 50, 53, 54

U.K. SV-632B 6, 8, 10, 12, 13, 15, 16, 22, 23, 27, 35, 38, 50, 54

SV-234B 3, 8, 10, 16, 22, 27, 35, 38, 50, 54

SV-232B 8, 10, 16, 22, 27, 35, 38, 50, 54

GERMANY SV-632X

2, 5, 7, 8, 9, 10, 12, 13, 14, 16, 18, 22, 23, 24, 29, 32, 35, 38, 50, 53, 54

SV-232XB/232XS/232XG/232XM

2, 5, 7, 16, 18, 22, 23, 24, 29, 32, 35, 38, 50, 53, 54,

AUSTRIA SV-232X 2, 5, 7, 16, 18, 22, 23, 24, 32, 35, 38, 50, 53, 54

SWITZERLAND SV-232X 2, 5, 7, 16, 18, 22, 23, 24, 31, 32, 35, 38, 50, 53, 54

SPAIN SV-632X 5, 8, 9, 10, 12, 13, 14, 15, 16, 18, 22, 23, 31, 35, 38, 50, 53, 54

SV-234X 5, 7, 16, 18, 22, 23, 24, 31, 35, 38, 50, 53, 54

SV-232X 5, 16, 18, 22, 23, 31, 35, 38, 50, 53, 54

ITALY SV-232XS/232XB 5, 16, 18, 22, 23, 29, 31, 35, 38, 50, 53, 54

PORTUGAL SV-232X 5, 16, 18, 22, 23, 35, 38, 48, 50, 53, 54

NETHERLAND SV-632X

5, 8, 9, 10, 12, 13, 14, 15, 16, 18, 22, 23, 29, 30, 32, 35, 38, 50, 53, 54

SV-232X 16, 18, 22, 29, 30, 32, 35, 38, 50, 54

DENMARK SV-632X

5, 8, 9, 10, 12, 13, 14, 15, 16, 18, 22, 23, 29, 30, 35, 38, 50, 53, 54

SV-232X 16, 18, 22, 29, 30, 35, 38, 50, 54

SWEDEN SV-232X 16, 18, 22, 29, 30, 31, 35, 38, 50, 54

NORWAY SV-232X 16, 18, 22, 30, 31, 35, 38, 50, 54

GREECE SV-232X 16, 18, 22, 29, 31, 32, 35, 38, 50, 54

U.A.E. SV-232G

8, 11, 16, 17, 18, 20, 22, 25, 26, 30, 31, 32, 35, 38, 42, 48, 50, 54

SAUDI ARABIA SV-250G

8, 11, 16, 17, 18, 20, 22, 25, 26, 30, 31, 32, 35, 38, 42, 48, 50, 54

IRAN SV-250G 8, 11, 16, 17, 18, 20, 22, 25, 26, 29, 35, 38, 41, 42, 48, 50, 54

MALAYSIA SV-232G 8, 9, 10, 16, 17, 18, 20, 22, 25, 26, 29, 31, 32, 35, 38, 42, 50, 54

THAILAND

SV-D200B/D200M/D200G

8, 9, 10, 16, 17, 18, 22, 25, 26, 29, 31, 32, 35, 38, 42, 50, 54

SOUTH AFRICA SV-222I8, 9, 11, 16, 17, 18, 22, 25, 26, 29, 31, 32, 35, 38, 42, 50, 54

AFRICA SV-D22K 9, 10, 11, 17, 18, 19, 22, 29, 31, 32, 34, 37, 39, 40, 42, 55

2-6 Samsung Electronics

Alignment and Adjustment

MEMO

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