Hitachi-HTDK150E-mc-sm 维修电路原理图.pdf
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1、 JULY 2001 SM0151 SERVICE MANUAL MANUEL DENTRETIEN 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 deffectuer lentretien du chassis, le technicien
2、doit lire les Prcautions de scurit et les Notices de scurit du produit prsents dans le prsent manuel. VORSICHT: Vor ffnen des Gehuses hat der Service-Ingenieur die Sicherheitshinweise“ und Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen. Data contained within this Service manual
3、is subject to alteration for improvement. Les donnes fournies dans le prsent manuel dentretien peuvent faire lobjet de modifications en vue de perfectionner le produit. Die in diesem Wartungshandbuch enthaltenen Spezifikationen knnen sich zwecks Verbesserungen ndern. HTDK150ERadioFans.CN 收音机爱 好者资料库
4、ENGLISH SAFETY PRECAUTIONS WARNING: The following precautions must be observed.ALL PRODUCTS Before any service is performed on the chassis an isolation transformer should be inserted between the power line and the product. 1. When replacing the chassis in the cabinet, ensure all the protective devic
5、es are put back in place. 2. When service is required, observe the original lead dressing. Extra precaution should be taken to ensure correct lead dressing in any high voltage circuitry area. 3. Many electrical and mechanical parts in HITACHI products have special safety related characteristics. The
6、se characteristics are often not evident from visual inspection, nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified by marking with a
7、! on the schematics and the replacement parts list. The use of a substitute replacement component that does not have the same safety characteristics as the HITACHI recommended replacement one, shown in the parts list, may create electrical shock, fire, X-radiation, or other hazards. 4. Always replac
8、e original spacers and maintain lead lengths. Furthermore, where a short circuit has occurred, replace those components that indicate evidence of overheating. 5. Insulation resistance should not be less than 2M ohms at 500V DC between the main poles and any accessible metal parts. 6. No flashover or
9、 breakdown should occur during the dielectric strength test, applying 3kV AC or 4.25kV DC for two seconds between the main poles and accessible metal parts. 7. Before returning a serviced product to the customer, the service technician must thoroughly test the unit to be certain that it is completel
10、y safe to operate without danger of electrical shock. The service technician must make sure that no protective device built into the instrument by the manufacturer has become defective, or inadvertently damaged during servicing. CE MARK 1. HITACHI products may contain the CE mark on the rating plate
11、 indicating that the product contains parts that have been specifically approved to provide electromagnetic compatibility to designated levels. 2. When replacing any part in this product, please use only the correct part itemised in the parts list to ensure this standard is maintained, and take care
12、 to replace lead dressing to its original state, as this can have a bearing on the electromagnetic radiation/immunity. PICTURE TUBE 1. The line output stage can develop voltages in excess of 25kV; if the E.H.T. cap is required to be removed, discharge the anode to chassis via a high value resistor,
13、prior to its removal from the picture tube. 2. High voltage should always be kept at the rated value of the chassis and no higher. Operating at higher voltages may cause a failure of the picture tube or high voltage supply, and also, under certain circumstances could produce X-radiation levels moder
14、ately in excess of design levels. The high voltage must not, under any circumstances, exceed 29kV on the chassis (except for projection Televisions). 3. The primary source of X-radiation in the product is the picture tube. The picture tube utilised for the above mentioned function in this chassis is
15、 specially constructed to limit X-radiation. For continued X-radiation protection, replace tube with the same type as the original HITACHI approved type 4. Keep the picture tube away from the body while handling. Do not install, remove, or handle the picture tube in any manner unless shatterproof go
16、ggles are worn. People not so equipped should be kept away while picture tubes are handled LASERS If the product contains a laser avoid direct exposure to the beam when the cover is open or when interlocks are defeated or have failed. RadioFans.CN 收音机爱 好者资料库 FRANAIS CONSIGNES DE SECURITE AVERTISSEME
17、NT: vous devez respecter les prcautions suivantes POUR TOUS LES PRODUITS Avant deffectuer une intervention dentretien sur le chssis, vous devez insrer un transformateur disolement entre la ligne dalimentation lectrique et le produit. 1. Lors de la remontage du chssis dans le coffret, vrifiez que tou
18、s les dispositifs de protection sont remis en place. 2. Lorsquune intervention dentretien savre ncessaire, respectez lagencement dorigine des conducteurs. Vous devez prendre des prcautions supplmentaires pour garantir un agencement correct des conducteurs dans toutes les zones o des circuits haute t
19、ension sont prsents. 3. De nombreux composants lectriques et mcaniques des appareils HITACHI ont des caractristiques spciales de scurit. Bien souvent, ces caractristiques ne sont pas videntes lors dun examen visuel et la protection quils offrent nest pas forcment garantie si vous utilisez des compos
20、ants de rechange conus, par exemple, pour une tension plus leve, une puissance plus forte. Les pices de rechange qui offrent des caractristiques spciales de scurit sont identifies par un reprage comportant le symbole ! sur les schmas et sur la nomenclature des pices de rechange. Lemploi dun composan
21、t de rechange qui ne respecte pas les mmes caractristiques de scurit que la pice de rechange que recommande HITACHI et qui figure dans la nomenclature risque de provoquer un choc lectrique, un incendie, des rayons X ou dautres dangers. 4. Remettez toujours en place les entretoises dorigine et respec
22、tez la longueur des conduites. En outre, la suite dun court-circuit, remplacez les composants prsentant des signes de surchauffe. 5. La rsistance disolement doit tre suprieure ou gale 2 mga ohms 500 V c.c. entre les ples principaux et des composants mtalliques accessibles, quels quils soient. 6. Auc
23、un claquage et aucune rupture ne doit se produire pendant lessai de rsistance dilectrique la suite de lapplication dune tension de 3 kV c.a. ou de 4,35 kV c.c. pendant deux secondes entre les ples principaux et des composants mtalliques accessibles. 7. Avant de remettre au client un produit qui a fa
24、it lobjet dun entretien, le technicien qui sest charg de cette intervention doit tester fond cet ensemble pour sassurer quil ne prsente aucun danger oprationnel et aucun risque de choc lectrique. Ce technicien doit sassurer quaucun des dispositifs de protection intgrs cet instrument par le fabricant
25、 nest dfectueux ou na t endommag de faon accidentelle lors de lentretien. LABEL CE 1. Les produits HITACHI peuvent avoir reu le label CE qui figure sur la plaque signaltique pour indiquer que cet ensemble contient des composants qui ont fait lobjet dune homologation spcifique de respect des normes d
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