Samsung SV-DVD440 User Manual

DVD-VCR COMBINATION

Chassis : Kaiser SV-DVD440

TRAINING

1. Precautions

2. Reference Information

3. Product Specification

4. Operating Instructions

5. Disassembly 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-DVD440

AUX

ELECTRONICS

Printed in Korea

AK82-00513A

This Service Manual is a property of Samsung Electronics Co .,Ltd. Any unauthorized use of Manual can be punished under applicable

International and/or domestic law.

Samsung Electronics

6-1

6. Alignment and Adjustments

6-1 VCR Adjustment

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

2) When replacing the Main PCB Micom (IC601) and NVRAM (IC603 ; 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) How to adjust.

- Press the “TEST” botton on VCR MAIN PCB to set the adjustment mode.

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

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

6-1-1(a) Location of adjustment button of remote control

Fig. 6-1

X-Point (Tracking Center) Adjustment ;

Head Switching Adjustment ;

NVRAM Option Setting ;

OPEN/CLOSE

STANDBY/ON

6-1-1 Reference

6-2

Alignment and Adjustments

Samsung Electronics

6-1-1(b) TEST location for adjustment mode setting

Fig. 6-2 VCR Main PCB (Top View)

TEST BUTTON

Alignment and Adjustments

6-3

Samsung Electronics

6-1-2 Head Switching Point Adjustment

1) Playback the alignment tape.

2) Press the “TEST” botton on VCR MAIN PCB to set the adjustment mode. (See Fig. 6-2)

3) Press the “1, 0” buttons; remote control adjustment operates automatically. (See Fig. 6-1)

6-1-3 NVRAM Option Setting

1) Press the “TEST” botton on VCR MAIN PCB to set the adjustment mode. (See Fig. 6-2)

Press the “1, 4” button on the remote control. The option setting appears. (See Fig. 6-3)

Select the option number (See table 6-1) of corresponding model with “ , , , ” buttons on the

remote control.

4) After selecting the option number is completed, press the “ ” button of remote control. (If “ ” button is pressed, the selected number is changescolor. ; See Fig. 6-4)

5) Press the “ENTER” button of remote control again to store the option number.

6) Turn the Power off.

1) NVRAM Option is adjusted in the factory.

2) In case Main PCB Micom (IC601) and NVRAM (IC603 ; EEPROM) are replaced, be sure to set the corresponding option number of the required model. (If the option is not set, the unit will not operate.)

MOVE : SAVE : ENTER

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

Fig. 6-3

MOVE : COMPLETE

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

Fig. 6-4

MODEL OPTION NUMBERS

SV-DVD440/XEF 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 20, 21, 26, 33, 34, 35, 36, 38, 40, 47, 48, 61, 63, 65, 69, 72 SV-DVD440/XEB 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 20, 21, 26, 33, 34, 35, 36, 38, 40, 42, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/XEU 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 27, 34, 38, 40, 41, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/XEUI 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 25, 26, 34, 38, 40, 43, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/XEN, XEC 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 34, 36, 38, 40, 42, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/XEE 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 34, 36, 38, 40, 42, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/XEG, COM 4, 5, 6, 7, 9, 10, 11, 12, 13, 15, 16, 34, 36, 38, 40, 42, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/XET 4, 5, 6, 7, 9, 10, 11, 12, 13, 15, 16, 34, 36, 38, 40, 42, 47, 48, 61, 63, 65, 69, 72

SV-DVD440/EUR, XEO 4, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 20, 33, 34, 36, 38, 42, 47, 48, 61, 63, 65, 69, 72

DVD-V440/FES 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 20, 30, 34, 36, 38, 42, 44, 47, 48, 49, 51, 61, 63, 65, 69 DVD-V440/AFR 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 20, 21, 30, 33, 34, 36, 38, 42, 44, 47, 48, 49, 51, 61, 63, 65, 69

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)

Pin 29 of RIC1

Alignment and Adjustments

6-5

Samsung Electronics

6-2-2(a) Adjustment Spec. and Test Point

6-2-2 Skew Adjustment

Test Disc Adjustment Spec. Test Point Adjustment Location

TDV-533 “Pin 29 of RIC1” 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

6-6

Alignment and Adjustments

Samsung Electronics

6-2-2(b) SKEW Adjustment Method

Needed to minimize the variations in Skew of the Pickup unit and to provide optimum match with the recorded signal on the Disc.

1) Connect an Oscilloscope to the “Pin 29 of RIC1” Test Point (See Fig. 6-5).

2) Connect Power, Open the Tray and Play Ch.14 Which is in the TDV-533 Disc.

◆ Set the Oscilloscope 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 in a horizontal position. Use both “A” and “B” screws to adjust.

    



     

Typical Waveform before Adjustment Waveform after Correct Adjustment

Fig. 6-7 Envelope Waveform

6-3 VCR Mechanical Adjustment

6-3-1 Tape Transport System and Adjustment Locations

The tape transport system has been adjusted precisely in the factory. Alignment is not necessary except for the following :

1) Noise observed on the screen.

2) Tape damage.

3) Parts replacement in the tape transport system.

Lower flange height of tape guide is used as the reference for the transport adjustment. To maintain 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

POST TENSION

MAIN BASE

FE HEAD CYLINDER ASS'Y

PINCH ROLLER

GUIDE ROLLER "S" GUIDE ROLLER "T"

#8 GUIDE POST #9 GUIDE POST

CAPSTAN SHAFT

ACE HEAD

#3 GUIDE POST

Alignment and Adjustments

6-7

Samsung Electronics

6-8

Alignment and Adjustments

Samsung Electronics

6-3-2 Tape Transport System Adjustment

When parts are replaced, perform the required adjustments by referring to procedures for the tape transport system. If there are any changes to the tape path, first run a T-120 tape and make sure excessive tape wrinkle does not occur at the tape guides.

◆ If tape wrinkle is observed at the guide roller S, T, turn the guide roller S, T until wrinkle disappears.

◆ If the tape wrinkle 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 Fig. 6-10 and 6-11)

Fig. 6-10 Location of ACE Head Adjustment Screw

Fig. 6-11 ACE Head Height Adjustment

SCREW (A)

TLIT ADJUST

X-POSITION

ADJUSTING SLIT

SCREW (C) HEIGHT ADJUST

SCREW (D) X-POSITION LOCKING

SCREW (B)

AZIMUTH ADJUST

0 ~ 0 .25 mm

AUDIO HEAD

VIDEO HEAD

CONTROL HEAD

Alignment and Adjustments

6-9

Samsung Electronics

b. ACE HEAD TILT ADJUSTMENT

1) Playback a blank tape and observe the position of the tape at the lower flange of tape guide.

2) Confirm that there is no curl or wrinkle at the lower 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 7KHz signal.

2) Connect channel-1 scope probe to audio output.

3) Adjust screw (B) to achieve maximum audio level. (See Fig. 6-10)

(A) (B)

(BAD)

WRINKLE

(GOOD)

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