Magnavox MWC24T5 WAVEFORMS

WAVEFORMS

X7TWF

1-12-1

WF2

WF1 WF5

WF4 WF8

WF7

WF3

WF9

WF11

WF13

WF14

WF10

WF15

WF16

WF12

WF18

WF17

WF19

WF20

SPDIF

SPDIF

1V 0.1

0.1

µ

sec

Input: NTSC Color Bar Signal (with 1kHz Audio Signal) --- WF1~WF16

DVD Video (Power on (Stop) MODE) --- WF17, WF18

CD (1KHz Play) --- WF19, WF20

INITIAL POSITION: Unplug unit from AC outlet for at least five minutes,

reconnect to AC outlet and then turn power on.

(Brightness---Center Color---Center Tint --- Center Contrast---Approx 70%)

1DIV: 2V 5ms

TP1402 RF-SW

1DIV: 0.2V 0.1µs

IC1401 Pin 49

1DIV: 1V 10ms

TP1202 CTL-AMP-OUT

1DIV: 0.25V 20µs

IC1401 Pin 32

1DIV: 0.5V 20µs

TP1401 V-OUT

Upper: WF6 Lower: WF1

1DIV: 0.2V 2DIV: 5V 5ms

TP1403 ENV.

1DIV: 0.5V 0.5ms

IC1401 PIN9

1DIV: 0.5V 0.5ms

IC1401 PIN10

1DIV: 2V 20µs

TP1305 H-OUT

1DIV: 200V 20µs

Q2571 COLLECTOR

1DIV: 10V 5ms

CN2571 PIN 5

1DIV: 20V 20µs

Q2503 COLLECTOR

1DIV: 20V 20µs

Q2502 COLLECTOR

1DIV: 20V 20µ

Q2501 COLLECTOR

1DIV: 1V 20µs

IC1201 PIN 58

1DIV: 1V 5ms

IC1201 PIN 59

1DIV: 0.2V 20µs

TP2513 DVD-Y

1DIV: 0.2V 20µs

TP2512 DVD-C

1DIV: 0.5V 0.5ms

CN2503 PIN 18

1DIV: 1V 0.1µs

CN2 PIN 1

s

Contents

Main SERVICE MANUAL 24 COLOR TV/DVD/VCR MWC24T5 IMPORTANT SAFETY NOTICE MAIN SECTION 24 COLOR TV/DVD/VCR MWC24T5 TABLE OF CONTENTS Main Section SPECIFICATIONS < DEFLECTION > < DVD > < VIDEO & CHROMA > < VCR > < TUNER > < NORMAL AUDIO> < Hi-Fi AUDIO > LASER BEAM SAFETY PRECAUTIONS CAUTION Location: Top of DVD mechanism. LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM. IMPORTANT SAFETY PRECAUTIONS Safety Precautions for TV Circuit + _ ALSO TEST WITH PLUG REVERSED USING AC ADAPTER PLUG AS REQUIRED Page Precautions during Servicing Safety Check after Servicing 1. Clearance Distance 2. Leakage Current Test STANDARD NOTES FOR SERVICING Circuit Board Indications Instructions for Connectors Pb (Lead) Free Solder How to Remove / Install Flat Pack-IC Page 2. Installation Example : Instructions for Handling Semi- conductors 1. Ground for Human Body 2. Ground for Workbench <Incorrect> <Correct> PREPARATION FOR SERVICING How to Enter the Service Mode Preparing 1: How to Enter the Service Mode Preparing 2: CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart 2. Disassembly Method CAUTION! Reference Notes in the Table [1] Rear Cabinet Page [3] CRT View for A 1-6-5 T2202DC DVD MAIN CBA UNIT MAIN CBA CRT CBA DECK ASSEMBLY SUB CBA ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: CBA is abbreviation for Circuit Board Assembly. Test Equipment Required How to make service remote control unit: How to enter the Service mode: 2. Setting for CONTRAST, COLOR, TINT, V-TINT and SHARP Data Valu es 3. H f0 Adjustment 4. Cut-off Adjustment 5. H. Size Adjustment 6. H. Pincushion Adjustment 7. White Balance Adjustment 8. Sub-Brightness Adjustment Color Analyzer White Black This bar just visible 9. Focus Adjustment 10. H. Position Adjustment 11. V. Shift Adjustment 12. V. Size Adjustment 13. Head Switching Position Adjustment 14. Purity Adjustment GREEN RED BLUE 15. Convergence Adjustment HOW TO INITIALIZE THE TV/DVD/VCR < DVD Section > < TV/VCR Section > FIRMWARE RENEWAL MODE 1-10-1 BLOCK DIAGRAMS < TV/VCR Section > DRIVE MOTOR M FUNCTION CBA Video Block Diagram I/F SERIAL SP CYLINDER ASSEMBLY Audio Block Diagram JUNCTION-B CBA JUNCTION-A CBA /STANDBY MUTE Hi-Fi Audio Block Diagram PB AUDIO SIGNAL REC AUDIO SIGNAL MAIN CBA CYLINDER T2202BLH TV Process Block Diagram REC VIDEO SIGNAL PB VIDEO SIGNAL DVD VIDEO SIGNAL T2202BLT Mode : SP/REC MAIN CBA SUB CBA CRT/H.V. Block Diagram Q2533 Q2531 H. REC VIDEO SIGNAL PB VIDEO SIGNAL DVD VIDEO SIGNAL COLD T2202BLP SUB CBA HOT MAIN CBA BLOCK DIAGRAMS < DVD Section > DVD MAIN CBA UNITDRIVE CBA T2202BLSD DVD System Control / Servo Block Diagram M Digital Signal Process Block Diagram DVD AUDIO SIGNAL 1~4 7~1417~18 215~216 ~~ UNIT SCHEMATIC DIAGRAMS / CBAS AND TEST POINTS Standard Notes WARNING Notes: 3. Note: 7. Test Point Information 4. Mode: SP/REC 5. Voltage indications for PLAY and REC modes on the schematics are as shown below: 6. How to read converged lines Page Page Page Page Page 1-11-8 T2202SCM6 Main 6/6 Schematic Diagram < TV/VCR Section > 4A 125V For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. CAUTION ! : ATTENTION : Utiliser un fusible de rechange de mme type de 4A, 125V. Page Page Page Page Page Page 1-11-15 Main CBA Top View < TV/VCR Section > Sensor CBA Top View BT1200F01013 BHF300F01011A BHF300F01011B 1-11-16 Main CBA Bottom View < TV/VCR Section > For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. CAUTION ! : ATTENTION : Utiliser un fusible de rechange de mme type de 4A, 125V. 4A 125V Sub CBA Top View < TV/VCR Section > 1-11-18 Sub CBA Bottom View < TV/VCR Section > BT1200F01023-A CRT CBA Top View < TV/VCR Section > CRT CBA Bottom View < TV/VCR Section > Page WAVEFORMS X7TWF 1-12-1 WIRING DIAGRAM < TV/VCR Section > CRT CBA SPEAKER SP801 JUNCTION-B WIRING DIAGRAM < DVD Section > PICK UP UNIT DVD MAIN CBA UNIT DRIVE CBA DVD MECHANISM SYSTEM CONTROL TIMING CHARTS < TV/VCR Section > Mode SW: LD-SW 1-14-2 X7T4HTI Chart 1 1-14-3 X7T4HTI Chart 2 1-14-4 X7T4HTI Chart 3 SLOW TIMING Refer to STILL/ CHART 1, 2. 1-14-5 X7T4HTI Chart 4 2. STOP(A) -> FF -> STOP(A) -> REW -> STOP(A) -> REC -> PAUSE -> PAUSE or REC -> STOP(A) -> EJECT < DVD Section > Tray Close ~ Play / Play ~ Tray Open IC PIN FUNCTION DESCRIPTIONS IC1201 (TV/VCR Micro Controller IC) Page 1-16-1 T2202LE LEAD IDENTIFICATIONS 1: GND 2: Vout 3: Vin 1-17-1 T2202CEX EXPLODED VIEWS DVD Mechanical Parts Junction-B CBA Sensor CBA W1601 Packing FRONT 20060325 1-18-1 T2202CA MECHANICAL PARTS LIST CRT Type No. CRT Warning Label CRT CRT Warning Label Location ELECTRICAL PARTS LIST MAIN CBA DVD MAIN CBA UNIT MMA CBA 20060325 1-19-2 T2202 EL DIODES 20060325 1-19-3 T2202 EL ICS COILS 20060325 1-19-4 T2202 EL 20060325 1-19-5 T2202 EL SWITCHES 20060325 1-19-6 T2202 EL SENSOR CBA MPS CBA SUB CBA DIODES ICS COILS 20060325 1-19-7 T2202 EL CRT CBA 20060325 1-19-8 T2202 EL FUNCTION CBA JUNCTION-B CBA JUNCTION-A CBA