Magnavox MWC24T5 Electrical Adjustment Instructions, Test Equipment Required, Ray Protection Test

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ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note: “CBA” is abbreviation for “Circuit Board Assembly.”

Note: Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed.

Also, do not attempt these adjustments unless the proper equipment is available.

Test Equipment Required

1.NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)

2.AC Milli Voltmeter (RMS)

3.Alignment Tape (FL8A, FL8N), Blank Tape

4.DC Voltmeter

5.Oscilloscope: Dual-trace with 10:1 probe,

V-Range: 0.001~50 V/Div,

F-Range: DC~AC-60 MHz

6.Frequency Counter

7.Plastic Tip Driver

8.Color Analyzer

How to make service remote control unit:

1.Prepare normal remote control unit (Part No. NE204UD or NE209UD). Remove 4 screws from the back lid (Fig. 1).

Screws

Remote control unit (bottom)	Fig. 1

2.Cut off pin 10 of the remote control microprocessor and short circuit pins 10 and 17 of the microprocessor with a jumper wire

How to enter the Service mode:

Service mode:

1.Use the service remote control unit.

2.Turn the power on. (Use main power on the TV unit.)

3.To enter the TV mode, press [CH. o / p] buttons on the TV unit.

4.Press [DISC MENU] button on the service remote control unit. Version of micro computer will display on the CRT. (Ex: BA4-0.16)

X-Ray Protection Test

X-Ray protection test should be done when replacing any parts of this chassis.

1.Short both ends of R2592 (on Sub CBA).

2.Confirm that the main power turns off.

3.If the main power does not turn off, then replace the following parts (D2591, Q2591, R2592, R2593, R2594 and IC1201).

4.Perform steps 1 to 3 again.

1. DC 120V (+B) Adjustment

Purpose: To obtain correct operation.

Symptom of Misadjustment: The picture is dark and unit does not operate correctly.

	Test Point	Adj. Point	Mode	Input


	TP2501(+B)	VR1601	---	---
	TP2504(GND)	VR1601	---	---
	TP2504(GND)

	Tape	M. EQ.		Spec.


	---	DC Voltmeter	+120±1.0 V DC

Note: TP2501(+B), TP2504(GND) --- Sub CBA, VR1601 --- Main CBA

1.Connect the unit to AC Power Outlet.

2.Connect DC Volt Meter to TP2501(+B) and TP2504(GND).

3.Adjust VR1601 so that the voltage of TP2501(+B) becomes +120±1.0 V DC.

1-7-1

T2202EA

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Contents Main Section Illustration at rightSuffix B Rating LabelImportant Safety Notice Main Section DVD SpecificationsDescription Condition Unit Nominal Limit PTD 1-NOR TIT.1 CHP.1VCR Hi-Fi AudioAmsp Pmsp Location Top of DVD mechanism Laser Beam Safety PrecautionsThis DVD player uses a pickup that emits a laser beam E7NLSPSafety Precautions for TV Circuit Important Safety PrecautionsReading should Test ALL ExposedTvdvdnisp Precautions during Servicing Measuring Method Power on Safety Check after ServicingClearance Distance Leakage Current TestHow to Remove / Install Flat Pack-IC Instructions for ConnectorsStandard Notes for Servicing Circuit Board IndicationsMachine Masking Flat Pack-IC Tape TweezersWith Soldering Iron With Iron Wire InstallationPin 1 of the Flat Pack-IC Is indicated by a mark PresolderGround for Human Body Instructions for Handling Semi- conductorsGround for Workbench IncorrectHow to Enter the Service Mode How to Enter the Service ModePreparation for Servicing PreparingDisassembly Flowchart Cabinet Disassembly InstructionsDisassembly Method RemovalFig. D1 Reference Notes in the TableTray Chassis Unit Anode Cap CRT CBADVD Mechanism DVD Main CBA Unit How to make service remote control unit Electrical Adjustment InstructionsDC 120V +B Adjustment Test Equipment RequiredF0 Adjustment GeneralR2583 CH. o / p buttons Video Cut-off Adjustment Size AdjustmentPincushion Adjustment White Balance Adjustment Sub-Brightness AdjustmentSmpte 10. H. Position Adjustment Focus Adjustment11. V. Shift Adjustment 12. V. Size AdjustmentHead Switching Position Adjustment Purity AdjustmentGreen RED Blue Magnet RB Magnet RB-G Convergence AdjustmentHOW to Initialize the TV/DVD/VCR DVD SectionTV/VCR Section Firmware Renewal Mode Appearance shown in *1 of Fig. b is described as followsAppearance State Main CBA 10-1 T2202BLSVideo Block Diagram 10-2T2202BLV Audio Block Diagram 10-3T2202BLA Diagram 10-4T2202BLH 10-5 T2202BLT TV Process Block DiagramCRT/H.V. Block Diagram 10-6T2202BLCRT IC1601 Power Supply Block DiagramT2202BLSD 10-810-9 T2202BLD Digital Signal Process Block DiagramSchematic Diagrams / CBA’S and Test Points Standard NotesX7TNSC Test Point Information How to read converged linesArea D3 Area B1T2202SCM1 Main 1/6 & Sensor Schematic Diagram TV/VCR SectionT2202SCM2 Main 2/6 Schematic Diagram TV/VCR SectionT2202SCM3 Main 3/6 Schematic Diagram TV/VCR SectionT2202SCM4 Main 4/6 Schematic Diagram TV/VCR SectionT2202SCM5 Main 5/6 & Junction-A Schematic Diagram TV/VCR SectionT2202SCM6 Main 6/6 Schematic Diagram TV/VCR SectionT2202SCSUB1 Sub 1/2 Schematic Diagram TV/VCR SectionSub 2/2 Schematic Diagram TV/VCR Section 11-10T2202SCSUB2 Function & Junction-B Schematic Diagram TV/VCR Section CRT Schematic Diagram TV/VCR SectionT2202SCCRT T2202SCF 11-1111-12 T2202SCD1 DVD Main 1/3 Schematic Diagram DVD Section11-13 T2202SCD2 DVD Main 2/3 Schematic Diagram DVD Section11-14 T2202SCD3 DVD Main 3/3 Schematic Diagram DVD SectionBHF300F01011A Main CBA Top View TV/VCR SectionBHF300F01011B 11-15 BT1200F0101311-16 BT1200F01013 Main CBA Bottom View TV/VCR Section11-17 BT1200F01023-A Sub CBA Top View TV/VCR Section11-18 BT1200F01023-A Sub CBA Bottom View TV/VCR Section11-19 BT1200F01023-B BT1200F01023-E BT1200F01023-C 11-20 BT1200F01023-DWaveforms 12-1X7TWF T2202WIT 13-113-2 T2202WID WiringMode SW LD-SW System Control Timing ChartsSymbol Symbol Loading Status14-2 Chart14-3 STILL/SLOW- Play 14-414-5 Tray Close ~ Play / Play ~ Tray Open Pin Signal Function ≥ 4.5 V, L ≤ 1.0 Pin Signal FunctionIC PIN Function Descriptions IC1201 TV/VCR Micro Controller ICOUT YCA-SDA PB-HOUT YCA-CS OUT YCA-SCL16-1 T2202LE Lead IdentificationsCabinet Exploded ViewsDVD Mechanical Parts 17-1 T2202CEX17-2 T2203PEX PackingV501 and L551 Combination Mechanical Parts ListCRT Warning Label Location CRT Type No. CRT Warning Label20060325 19-1 T2202EL Electrical Parts ListCCD3DKA0B821 20060325 19-2 T2202ELICS 20060325 19-3 T2202EL20060325 19-4 T2202EL 20060325 19-5 T2202EL SwitchesWT1 Lead Clamper 20060325 19-6 T2202EL20060325 19-7 T2202EL 20060325 19-8 T2202EL CRT CBAT2202UC MWC24T5