Mitsubishi Electronics VS-60609 service manual CRT Replacement, Removal of the CRT

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

CRT REPLACEMENT

1. Removal of the CRT

Caution! High voltage should be completely discharged prior to CRT removal. Since The CRTs receive high voltage from the CR Block, discharge by shorting the open end of the respective high voltage cable to chassis ground.

Note: Refer to figures 1-1 through 2-2 when performing steps 1 through 4.

1.Remove the Speaker Grille, Front Board, and Screen Assy.

2.Remove the Back Board.

3.Remove the Anode Lead Wire from the CR Block.

4.Remove the PCB-CRT.

5.Remove 4 hex-screws "a" retaining the Optical Unit. [Figure 5-1]

6.Remove 4 screws "b" retaining the Lens.

Note: DO NOT loosen the RED screws. Doing so will break the seal between the

C-Element and the # 6 Lens, causing leakage of the CRT Coolant.

7.Remove 4 screws "c" retaining the CRT. [Figure 5-2]

8.Remove the Deflection Yoke from the neck of the CRT. [Figure 5-7]

Figure 5-1

Figure 5-2

Note: The 4 spring-loaded screws shown in Fig 5-2 and labeled as "DO NOT REMOVE", should not be loosened under any circumstance. Doing so will break the seal between the CRT and the CRT-Spacer, causing leakage of the CRT Coolant.

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Contents Mitsubishi Digital Electronics AMERICA, INC VZ9Models Page Contents Chip Parts Replacement Replacement Parts Service Parts List Circuitry Block DiagramsProduct Safety Notice IntroductionLeakage current check Safety PrecautionsRadiation warning Refer to Parts List for Part Numbers Cabinet Disassembly Front ViewFront Cabinet Disassembly 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 DisplayPIP Function Adjustment Items ListAudio 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-0-1-5-7PIP Insert Picture Color and Tint SymptomPIP Circuit Purpose On-screen display is not positioned correctly 13. Cb, Cr Offset SymptomCb, Cr Circuit Purpose Abbr Data Convergence Circuit Purpose Height and Vert. Linearity SymptomDeflection Circuit Purpose Convergence Circuit Purpose Coarse Convergence Fine Convergence Symptom Color edging at the top, bottom and sides of the pictureChip Parts Removal Transistors ReplacementChip Parts Removal Resistors, Capacitors, etc 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 ZTS6620Resistors TransformersVariable Resistors R529 R521Carbon 1/4W 10K-J Fuse 1/2W 0.82-JComposition 1/2W 1M-K Capacitors & TrimmersComposition 1/2W 4.7M-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 C904Printed Circuit Boards AccessoriesMiscellaneous 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