SAMSUNG VP_A50-52-55-57 Service Manual

8mm CAMCORDER

VP-A50/VP-A52 VP-A55/VP-A57

SERVICE

1. Precautions

2. Reference Information

3. Product Specifications and Comparison Chart

4. Disassembly and Reassembly

5. Alignment and Adjustment

6. Exploded View and Parts List

7. Electrical Parts List

8. Block Diagrams

9. PCB Diagrams

10. Wiring Diagram

11. Schematic Diagrams

Manual

8mm CAMCORDER

CONTENTS

For mechanical disassembly and adjustment, refer to the “Mechanical Manual” (DE-6 AD68-30200A).

PUSH

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 protective 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) : 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).

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 earth 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. X-ray Limits : The picture tube is designed to prohibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original.

Fig. 1 AC Leakage Test

7. 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.

8. High Voltage Limit : High voltage must be measured each time servicing is done on the B+, horizontal deflection or high voltage circuits.

Heed the high voltage limits. These include the

X-ray protection Specifications Label, and the Product Safety and X-ray Warning Note on the

service data schematic.

9. 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.

10. 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.)

Device Under

Test

(Reading should not be above

0.5mA) Leakage

Currant Tester

Earth Ground

Test all

exposed metal

surfaces

Also test with plug reversed (using AC adapter plug as required)

2-Wire Cord

Precautions

1-2 Samsung Electronics

11. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

12. 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.

13. Hot Chassis Warning : Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord. If an isolation transformer is not used, these units may be safely serviced only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC source.

To confirm that the AC power plug is inserted correctly, do the following : Using an AC voltmeter, measure the voltage between the chassis and a known earth ground. If the reading is greater than 1.0V, remove the AC power plug, reverse its polarity and reinsert. Re-measure the voltage between the chassis and ground.

14. Some TV chassis are designed to operate with 85 volts AC between chassis and ground, regardless of the AC plug polarity. These units can be safely serviced only if an isolation transformer inserted between the receiver and the power source.

15. 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.

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

17. 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.

18. Picture Tube Implosion Warning : The picture tube in this receiver employs Òintegral implosionÓ protection. To ensure continued implosion protection, make sure that the replacement picture tube is the same as the original.

19. Do not remove, install or handle the picture tube without first putting on shatterproof goggles equipped with side shields. Never handle the picture tube by its neck. Some Òin-lineÓ picture tubes are equipped with a permanently attached deflection yoke; do not try to remove such Òpermanently attachedÓ yokes from the picture tube.

20. 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 Servicing Jigs and Special Tools

2-1-1 Servicing Jigs

Part No.

68140-500-033

Jig Item

Extension

Cable 1

Specification

Pin 44

Main board CCD board

DC/DC Converter board

Remarks

Troubleshooting

Description

CN503 CN901

68140-500-034

Extension

Cable 2

Pin 18

Troubleshooting

CN202

68140-500-036

TP Board -

For VCR section

adjustment

Use for adjustment of VCR section. (Connect TP Board to connector CTP01 of Main Board)

68140-500-033 68140-500-034 68140-500-035

68140-500-038

Extension Cable 1

Extension Cable 2

Extension Cable 3

Extension Cable 4

68140-500-036

TP Board

68140-500-035

Extension

Cable 3

Pin 40

Troubleshooting

CN203

68140-500-038

Extension

Cable 4

Pin 40

Troubleshooting

CNP01 CND02

Audio board

CN703

CN701

Reference Information

2-2 Samsung Electronics

2-4-2 Extension Cable Connections

2-4-3 TP Board Connections

ASS'Y DC/DC CONVERTER

EXTENSION CABLE 1

ASS'Y LENS ZOOM

ASS'Y AUDIO BOARD

ASS'Y MAIN BOARD

EXTENSION CABLE 4

EXTENSION CABLE 2

EXTENSION CABLE 3

CN503

CN901

ASS'Y CCD BOARD

CND02

CNP01

CN701

CN203

CN202

CN703

TP BOARD

ASS'Y MAIN BOARD

ASS'Y A/V JACK

VIDEO CABLE

PATTERN GENERATOR

LUMINANCE OUT

CTP01

Reference Information

Samsung Electronics 2-3

2-2 IC Blocks

2-2-1 IC101(CXA2002R)

Reference Information

2-4 Samsung Electronics

2-2-2 IC102(CXA1509AR)

Reference Information

Samsung Electronics 2-5

2-2-3 IC201(CXA2080R)

Reference Information

2-6 Samsung Electronics

2-2-4 IC203(CXA2003N)

Reference Information

Samsung Electronics 2-7

2-2-5 IC501(CXP87452)

Reference Information

2-8 Samsung Electronics

2-2-6 IC502(CXA1814N)

Reference Information

Samsung Electronics 2-9

2-2-7 IC503(LB8112M)

Reference Information

2-10 Samsung Electronics

2-2-8 IC701(AN2980)

Reference Information

Samsung Electronics 2-11

2-2-9 IC761(LA7471M)

Reference Information

2-12 Samsung Electronics

2-2-10 ICC04(CXP87P48AQ)

Reference Information

Samsung Electronics 2-13

2-2-11 ICC06(MPC17AT85ZVM)

Reference Information

2-14 Samsung Electronics

2-2-12 ICD01(ICX071AK)

2-2-13 ICD02(CXD1276AN)

Reference Information

Samsung Electronics 2-15

2-2-14 ICE01(CXA1854AR)-CVF

Reference Information

2-16 Samsung Electronics

2-2-15 ICE01(CXP81124)-EIS

Reference Information

Samsung Electronics 2-17

2-2-16 ICE01(KA7007)-EVF

Reference Information

2-18 Samsung Electronics

2-2-17 ICP01(CXA2006Q)

Reference Information

Samsung Electronics 2-19

2-2-18 ICP03(CXAD2312R)

Reference Information

2-20 Samsung Electronics

2-2-19 ICP04(CXD2180R)

Reference Information

Samsung Electronics 2-21

2-2-20 ICP05(CXD2153AR)

Reference Information

2-22 Samsung Electronics

2-2-21 ICP06(CXD2418R)

2-2-22 ICP07(CXD2415)

Samsung Electronics 3-1

3. Product Specifications and Comparison Chart

3-1 Product Specifications

Design and specifications are subject to change without notice.

Operation

Description

SYSTEM Recording systems Video : 2 rotary heads, helical FM scanning

Audio : FM system Video signal PAL colour, CCIR standard Cassette format 8 mm / Hi 8 mm Tape speed SP mode (Standard Play) : approx. 20.051 mm/sec

LP mode (Long Play) : approx. 10.058 mm/sec Playback time SP mode (Standard Play) : 1 hour 30 minutes (P5-90)

LP mode (Long Play) : 3 hours (P5-90) Fast-forward/rewind time Approx. 5 min. 40 secs (P5-60) Image device CCD (Charge Coupled Device)

Viewfinder VP-A50/VP-A55 : Black and White electronic viewfinder

VP-A52/VP-A57 : Colour viewfinder Lens Combined 16X power zoom lens, f=3.9~62.4mm, F1.4 auto wide macro:

filter diameter 46mm Automatic focus system Inner Colour temperature Auto/indoors : 3100°K; outdoor : 5100°K Lighting > 300 lux (28 footcandles) ; minimum lighting : 3 lux Aperture correction Automatic with back light adjustment INPUT/OUTPUT CONNECTORS Video output Phono jack / S-VIDEO jack, 1Vp-p, 75 ohms, unbalanced, SYNC negative Audio output Phono jack, 7.5dBs for an output impedance of less than 2.2 Kohms RFU DC OUT Special mini-jack, 5V DC Earphone output Minijack, 8 ohms GENERAL Power requirement AC power adaptor (7.5V) ; battery pack (6.0V) Power consumption 5.2W (in camera mode) Tripod attachment thread Attachment screw less than 9mm long Microphone Electric condensor microphone, omni-directional, stereo type Temperature range Operation : 0°C to 40°C (32°F to 104°F); storage : -20°C to 60°C (-4°F to 140°F) Dimensions/weight Appros. 101 X 109 X 198 mm (3.9 X 4.1 X 7.8 inches) ; approx. 750 g (1.65 lbs)

including lens cap, excluding battery pack and cassette

Product Specifications

3-2 Samsung Electronics

3-2 Comparison Chart

VIEWFINDER EVF CVF EVF CVF D.ZOOM X X32 D.ZOOM X64 D.ZOOM X64 D.ZOOM STEREO O O O O EIS X X O O WIDE X O O O

MODEL

FUNCTION

VP-A50 VP-A52 VP-A55 VP-A57 REMARK

Samsung Electronics 4-1

4. Disassembly and Reassembly

4-1 Cabinet Disassembly

1 APPLY POWER AND OPEN

THE HOUSING ASS'Y.

2 REMOVE 2 SCREWS.

( BH ; M 1.7 X 5 )

REMOVE THE ASS'Y COVER HOUSING IN THE DIRECTION OF ARROW.

4-1-1 Ass’y Cover Housing Removal

Fig. 4-1 Ass’y Cover Housing Removal

Disassembly and Reassembly

4-2 Samsung Electronics

1 REMOVE ASS'Y CASE TOP BY GENTLELY RELEASING

2 LOCKING TABS WITH A SMALL SCREW DRIVER. (SEE DETAIL "A")

2 LOCKING TABS

PRECISION SCREW DRIVER

DETAIL "A"

DETAIL "B"

REASSEMBLY : PUT THE 7 TABS INTO THE SLOT, WHILE SLIDING IT AS SHOWN IN DETAIL "B".

4-1-2 Ass’y Case Top Removal

Fig. 4-2 Ass’y Case Top Removal

Disassembly and Reassembly

Samsung Electronics 4-3

1 REMOVE 3 SCREWS.

( BH ; M2 X 5 )

3 REMOVE THE ASS'Y FRONT

IN THE DIRECTION OF ARROW .

2 OPEN THE COVER JACK IN

THE DIRECTION OF ARROW .

4 DISCONNECT THE FPC FROM

THE CN702 OF ASS'Y AUDIO BOARD.

LEVER - BUILT

NOTE : WHEN REASSEMBLING, PUSH THE LEVER - BUILT TOWARD ARROW AND THEN REINSTALL IT.

4-1-3 Ass’y Front Removal (1)

Fig. 4-3 Ass’y Front Removal (1)

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