Mitsubishi Electronics VS-60609 Safety Precautions, Radiation warning, Leakage current check

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MODELS: VS-45609 / VS-50609 / VS-55609 / VS-60609 / VS-60719 / VS-70709

SAFETY PRECAUTIONS

NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the receiver chassis.

WARNING:

1.Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard from the receiver's power supplies. Work on the receiver should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment.

2.Do not install, remove or handle the picture tubes in any manner unless shatterproof goggles are worn. People not so equipped should be kept away while the picture tube is being handled. Keep the picture tube away from the body while handling.

3.When service is required, observe the original lead dress. Extra precaution should be taken to assure correct lead dress in the high voltage area. Where a short-circuit has occurred, replace those components that indicate evidence of overheating.

X-Radiation warning

The surface of the cathode ray tubes (CRTs) may generate X-Radiation, so take proper precautions when servic- ing. It is recommended that a lead apron be used for shielding while handling the CRT. Use this method if possible.

When replacing the CRTs, use only the designated replacement part since it is a critical component with regard to X-Radiation. High voltage must be set as prescribed under the section titled Electrical Adjustments.

Leakage current check

Before returning the receiver to the customer, it is recommended that leakage current be measured according to the following methods.

1.Cold Check

With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug prongs. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal part (i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay, control shafts, etc.), particu- larly any exposed metal part that has a return path to the chassis. The resistance of the exposed metal parts having a return path to the chassis should be a minimum of 1Mega Ohm. Any resistance below this value indicates an abnormal condition and requires corrective action.

2.Hot Check ...Use the circuit shown below to perform the hot check test.

1.Keep switch S1 open and connect the receiver to the measuring circuit. Immediately after connection, and with the switching devices of the receiver in their operating positions, measure the leakage current for both positions of switch S2.

2.Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the switching devices of the receiver in their operating positions, measure the leakage current for both positions of switch S2. Repeat the current measurements of items 1 and 2 after the receiver has reached thermal stabilization. The leakage current must not exceed 0.5 milliampere (mA).

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Contents VZ9 ModelsMitsubishi Digital Electronics AMERICA, INC Page Contents Chip Parts Replacement Replacement Parts Service Parts List Circuitry Block DiagramsProduct Safety Notice IntroductionSafety Precautions Radiation warningLeakage current check Cabinet Disassembly Front View Front Cabinet DisassemblyRefer to Parts List for Part Numbers Cabinet Disassembly Rear View Rear Cabinet DisassemblyPage Size Length Table aCabinet Separation Procedure VS-70709 1c. VS-70709 Cabinet Separation PrecedureServicing the Diamondshield DiamondShield Removal ProcedureDiamondShield Installation Procedure Top & Bottom Molding Clips Side Molding ClipsChassis Removal and PCB Locations Major Parts LocationsCRT Replacement Removal of the CRTPage Adjustment procedures after replacing the CRTs Monoscope Signal Electrical AdjustmentsTest Signal Color Bar SignalDefault Settings Initial SettingsOption Menu Setup Description Initial SettingError Codes LED Indicator DiagnosticsError Code Operational Check AV MemorySelection of adjustment Functions Adjustment Items Adjustment FunctionsActivating the Circuit Adjustment Mode Changing DataConvergence Adjustment Mode Cursor Fine Conv PressSub Functions Cursor CoordinatesSaving Data and Exiting the Convergence Mode DisplayAdjustment Items List Audio FunctionPIP Function Conv Misc Convergence Mode ItemsHR Function Conv GreenDF Function Conv REDConv Blue VkeyPage Input Level Service ModeAudio Circuit Purpose Audio Function Abbrev DataConvergence Mode High Voltage Control SymptomDynamic Focus Symptom High Voltage Circuit PurposeMENU-0-1-5-9 Lens Focus Symptom Blurred pictureFocus Verification Color PressCRT Circuit Purpose CRT Cutoff SymptomAbbr Data Service Mode CRT CurrentLow Color Temperature Service Mode Activate …….. MENU-0-1-5-7Color and Tint Symptom PIP Circuit PurposePIP Insert Picture 13. Cb, Cr Offset Symptom Cb, Cr Circuit PurposeOn-screen display is not positioned correctly Abbr Data Height and Vert. Linearity Symptom Deflection Circuit PurposeConvergence Circuit Purpose Convergence Circuit Purpose Coarse Convergence Fine Convergence Symptom Color edging at the top, bottom and sides of the pictureReplacement Chip Parts Removal Resistors, Capacitors, etcChip Parts Removal Transistors Parts Tolerance Codes Critical and Warranty Parts DesignationParts Ordering Model AbbreviationsCRT Assemblies Remote ControlQuick Reference for Common Replacement Parts High Voltage / Deflection ComponentsTransistors TubesIntegrated Circuits DiodesCoils COIL-CHOKE ZTS6620Transformers Variable ResistorsResistors R529 R521Carbon 1/4W 10K-J Fuse 1/2W 0.82-JCapacitors & Trimmers Composition 1/2W 4.7M-KComposition 1/2W 1M-K CER-CHIP CH50V 47P-J CER-CHIP CH50V 82P-JCER-CHIP SL50V 470P-J CER-CHIP CH50V 68P-JPLA-PP 200V 0.47M-J C552C554 C568Poly 250VAC 0.1M-M C903 C901Poly 250VAC 0.1M-M C902 CER 250VAC 1000P-M C904Accessories MiscellaneousPrinted Circuit Boards Screen Parts Screen Assembly Power Supply Circuitry Block DiagramsVIDEO/COLOR Signal Path Sound Circuit Deflection Protect Circuit Convergence Circuitry Control Circuit Page Page Page Page Page Page Page Page Page Page Page
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