Hitachi CPX1402MS Schematic

No. 0416

SERVIC E MANUAL MANUEL D'ENTRETIE N WARTUNGSHANDBUCH

CAUTION:

Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual.

ATTENTION:

Avant d’effectuer l’entretien du châassis, le technicien doit lire les «Précautions de sécurité» et les «Notices de sécurité du produit» présentés dans le présent manuel.

VORSICHT:

Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.

CPX1402MS

Data contained within this Service manual is subject to alteration for improvement.

Les données fournies dans le présent manuel d’entretien peuvent faire l’objet de modifications en vue de perfectionner le produit.

Die in diesem Wartungshandbuch enthaltenen Spezifikationen können sich zwecks Verbesserungen ändern.

NAMES»

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

Monitor

December 1999

DESCRIPTION : 14 INCH CCTV WITH 1-CAMERA INPUT

HORIZONTAL RESOLUTION 450 LINES

1) SPECIFICATIONS

COLOR SYSTEM : NTSC 3.58 / PAL-B POWER INPUT : AC 110-240V (50/60 Hz) POWER CONSUMPTION : 68W VIDEO IMPEDANCE : 75 Ohm BNC SOUND OUTPUT : 1.1 0.2W 8 Ohm SPEAKER SIZE : 77 mm 40 mm VIDEO OUTPUT LEVEL : 1.0 ~ 1.2Vp p at 75 Ohm VIDEO INPUT LEVEL : 1.0 ~ 1.2Vp p at 75 Ohm AUDIO OUTPUT LEVEL : RCA JACK TYPE

300 50mVrms

AUDIO INPUT LEVEL : RCA JACK TYPE

300 50mVrms SOUND DISTORTION : Less Than 10% HUM : Less Than 10mVrms BUZZ : Less Than 200mVp p

2) FEATURES

RASTER MUTING AT NO SIGNAL PROTECTION CIRCUIT FOR X-RAY S-VHS INPUT VIDEO THROUGH-OUT

3) CONTROLS & SWITCHES

MAIN AC POWER S/W : PUSH LOCK FRONT PICTURE CONTROL : ROTARY FRONT (CONTRAST, BRIGHTNESS, TINT, COLOR, SHARPNESS) VOLUME CONTROL : ROTARY FRONT S-VHS/CAMERA SELECTION : SLIDE SWITCH BACK VIDEO IMPEDANCE : SLIDE SWITCH BACK

4) LIGHTINGS

INDICATOR : POWER ON (GREEN)

5) JACK & TERMINALS

2 BNC : VIDEO INPUT/OUTPUT 2 AUDIO RCA : AUDIO INPUT/OUTPUT S-VHS MINI DIN : S-VHS INPUT AC INLET : AC INPUT

SPECIFICATIONS OF CCTV COLOR MONITOR SET

6) ACCESSORIES

WARRANTY CARD OWNER'S MANUAL POWER CORD

7) CABINET SIZE

350(W) *332(H) *370(D)

8) PACKING

BOX OUT : 437(W) *427(H) *450(D)

TY SET PER 40 FOOT FCL : 675 SETS

TY SET PER 20 FOOT FCL : 325 SETS

9) REMARKS

WEIGHT : 14 Kg

Follow these safety, servicing and ESD Precautions to prevent damage and protect against potential hazards, such as electrical shock and X-rays.

Safety 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: nonmetallic 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 opening 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 (Figure 1-1): Warning:Do not use an isolation transformer during this test.Use a leakagecurrent tester or a metering system that complies with International Electrotechnical Commission 65.(IEC 65)

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FIGURE 1-1 AC LEAKAGE TEST

PRECAUTIONS

5. With the unit completely reassembled, plug the AC line cord directly into the power outlet. @With the unit's 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: handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed <0.7mA peak AC <2mA DC. Reverse the power-plug in the AC outlet and repeat the test.

6.X-ray Limits: The picture tube is especially 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. Carefully reinstall the picture tube shields and mounting hardware; these also provide X-ray protection.

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

8. 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.

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. Components, parts and wiring that .appear to have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications. Always determine the cause of damage or overheating, and correct any potential hazards.

11. 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.

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

13. 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 "in-line" picture tubes are equipped with i pernianentlv citticilell deflection yoke; do not try to remove such "permanently attached" yokes from the picture tube.

14. 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 ( ). Use replacement components that heave 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.

Servicing Precautions

Warning 1: First read the "Safety Precaution" section of the manual.

If some unforeseen circumstance creates a conflict between the servicing and safety precautions,always follow the safety precaution.

Warning 2: An electrolytic capacitor installed with the wrong polarity might

explode

1. Servicing Precautions are printed on the cabinet.Follow them

2. Always unplug the unit's AC power cord from the AC power source before attempting to: (a) Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.

3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent coontact with thermally hot components. Reinstall all such elements to their original position.

4. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged.

5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels,. input terminals).

6. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON . Connect an insulation resistance meter (500V) to the blades of the AC plug. The insulation resistance between each blade of the AC plug and accessible

conductive parts (see above) should be greater than 1 megohm.

7. 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.

8. 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 list.

Precautions for Electrostatically Sensitive Devices (ESDS)

1. 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.

2. 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

3. After removing an ESD-equipped assembly,place it on a conductive surface such as aluminum foil to prevent accumulation of electrostatic charge.

4. Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDS.

5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDS.

6. Use only an anti-static solder removal device. Many solder removal devices are not rated as "anti-static"; these can accumulate sufficient electrical charge to damage ESDS.

7. Do not remove a replacement ESD front its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam,aluminum foil or other conductive materials.

8. Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

9. Minimize body motions when unpackaged replacement ESDS. Motion, such as brushing clothes together, or lifting a foot from a carpeted floor can generate, enough static electricity to damage an ESD.

Front View Side View

Rear View

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1011 12

1. POWER BUTTON

2. VOLUME

3. CONTRAST

4. BRIGHT

5. COLOR

6. SHARP

7. TINT

8. POWER LED LAMP

9. POWER INLET

10. IMPEDANCE SWITCH(HIGH/75

)

11. S-VHS/CAMERA SWITCH

12. S-VHS JACK

13. AUDIO IN JACK(RCA)

14. AUDIO OUT JACK(RCA)

15. VIDEO OUT JACK(BNC)

16. CAMERA INPUT JACK(BNC)

WARNING : TO PREVENT FIRE OR SHOCK HAZARD.

DO NOT EXPOSE THIS CCTV TO RAIN OR MOISTURE.

LOCATION OF CONTROLS

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EXPLODED VIEW

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