Magnavox MWC24T5 Preparation for Servicing, How to Enter the Service Mode, Preparing

Page 15

PREPARATION FOR SERVICING

How to Enter the Service Mode

Caution 1:

1.Optical sensors system are used for Tape Start and End Sensor on this equipment. Read this page carefully and prepare as described on this page before starting to service; otherwise, the unit may operate unexpectedly.

Preparing 1:

1.Cover Q1202 (START SENSOR) and Q1201 (END SENSOR) with Insulation Tape or enter the service mode to activate Sensor Inhibition automatically.

Note: Avoid playing, rewinding or fast forwarding the tape to its beginning or end, because both Tape End Sensors are not active.

How to Enter the Service Mode

1.Turn power on.

2.Use service remote control unit and press [DISC MENU] button. (See page 1-7-1.)

3.When entering the service mode, one of the number (1, 2 or 4) will be displayed at corners of the screen.

4.During the service mode, electrical adjustment mode can be selected by remote control key. (Service remote control unit).

Details are as follows.

Key

Adjustment Mode

 

 

 

Picture adjustment mode: Press the

 

[PICTURE] button to change from BRT

 

(Bright), *CNT (Contrast), *COL (Color),

PICTURE

*TNT(Tint), *V-T(V-Tint) and *SHP

 

(Sharp). Press [CH. o/p] buttons to

 

display Initial Value.

 

*Marked items are not necessary to

 

adjust normally.

Key

Adjustment Mode

 

 

 

 

7

Purity check mode: Shows Red, Green,

Blue or White cyclically on the screen

 

each time the [7] button is pressed.

 

 

8

H. Position adjustment: See adjustment

instructions page 1-7-5.

 

 

 

9

V. Shift/V.Size adjustment: See

adjustment instructions page 1-7-5.

 

 

 

VOL o

No need to use.

 

 

 

Cut-off adjustment: See adjustment

VOL p

instructions page 1-7-3.

White balance adjustment: See

 

 

adjustment instructions page 1-7-4.

 

 

Caution 2:

 

1.The deck mechanism assembly is mounted on the Main CBA directly, and SW1211 (REC-SAFETY SW) is mounted on the Main CBA. When deck mechanism assembly is removed from the Main CBA due to servicing, this switch can not be operated automatically.

Preparing 2:

1.To eject the tape, press the [STOP/EJECT] button on the unit (or Remote Control).

2.When you want to record during the Service mode, press the [Rec] button while depressing SW1211 (REC-SAFETY SW) on the Main CBA.

Q1201

Q1202

(END SENSOR)

(START SENSOR)

0

No need to use.

 

 

1

No need to use.

 

 

2

H f0 adjustment mode: See adjustment

 

instructions page 1-7-2.

3

No need to use.

 

 

4

Auto record mode: Perform recording

(15 Sec.) --> Stop --> Rewind (Zero

 

return) automatically.

 

 

5

Head switching position adjustment:

See adjustment instructions page 1-7-6.

 

 

 

6

No need to use.

SW1211 (REC-SAFETY SW)

MAIN CBA

1-5-1

T2203PFS

Page 14 Page 16
Image 15
Page 14 Page 16
Contents Rating Label Illustration at rightMain Section Suffix BImportant Safety Notice Main Section PTD 1-NOR TIT.1 CHP.1 SpecificationsDVD Description Condition Unit Nominal LimitVCR Hi-Fi AudioAmsp Pmsp E7NLSP Laser Beam Safety PrecautionsLocation Top of DVD mechanism This DVD player uses a pickup that emits a laser beamTest ALL Exposed Important Safety PrecautionsSafety Precautions for TV Circuit Reading shouldTvdvdnisp Precautions during Servicing Leakage Current Test Safety Check after ServicingMeasuring Method Power on Clearance DistanceCircuit Board Indications Instructions for ConnectorsHow to Remove / Install Flat Pack-IC Standard Notes for ServicingMachine Masking Flat Pack-IC Tape TweezersWith Soldering Iron Presolder InstallationWith Iron Wire Pin 1 of the Flat Pack-IC Is indicated by a markIncorrect Instructions for Handling Semi- conductorsGround for Human Body Ground for WorkbenchPreparing How to Enter the Service ModeHow to Enter the Service Mode Preparation for ServicingRemoval Cabinet Disassembly InstructionsDisassembly Flowchart Disassembly MethodFig. D1 Reference Notes in the TableTray Chassis Unit Anode Cap CRT CBADVD Mechanism DVD Main CBA Unit Test Equipment Required Electrical Adjustment InstructionsHow to make service remote control unit DC 120V +B AdjustmentF0 Adjustment GeneralR2583 CH. o / p buttons Video Cut-off Adjustment Size AdjustmentPincushion Adjustment White Balance Adjustment Sub-Brightness AdjustmentSmpte 12. V. Size Adjustment Focus Adjustment10. H. Position Adjustment 11. V. Shift 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 Area B1 How to read converged linesTest Point Information Area D3T2202SCM1 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 T2202SCF 11-11 CRT Schematic Diagram TV/VCR SectionFunction & Junction-B Schematic Diagram TV/VCR Section T2202SCCRT11-12 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 Section11-15 BT1200F01013 Main CBA Top View TV/VCR SectionBHF300F01011A BHF300F01011B11-16 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 WiringSymbol Loading Status System Control Timing ChartsMode SW LD-SW Symbol14-2 Chart14-3 STILL/SLOW- Play 14-414-5 Tray Close ~ Play / Play ~ Tray Open IC1201 TV/VCR Micro Controller IC ≥ 4.5 V, L ≤ 1.0 Pin Signal FunctionPin Signal Function IC PIN Function DescriptionsOUT YCA-SCL PB-HOUT YCA-SDA OUT YCA-CS16-1 T2202LE Lead Identifications17-1 T2202CEX Exploded ViewsCabinet DVD Mechanical Parts17-2 T2203PEX PackingCRT Type No. CRT Warning Label Mechanical Parts ListV501 and L551 Combination CRT Warning Label Location20060325 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
Top Page Image Contents