Service Manual. (7 Inch) LCD Color Monitor & DVD Player mp-man pdv-78

Service Manual (7 Inch) LCD Color Monitor & DVD Player mp-man pdv-78

1 Specification...... 2 2 Block Diagram.......4 3 General Alignment Instruction........5 4 Troubleshooting..... 7 5 Printed Circuit Board......12 6 Explode View....13 7 IC Block Diagram and Lead Identification.....29 8 Schematic Diagram.....39

SPECIFICATION Description Condition Unit Limit Nominal Result Video Signal Level Vp-p 0.7±0.1 0.7 SYNC Lever 75% color bar, 75 Vp-p 0.3±0.1 0.3 Video out level 0hm Vp-p 1.0±0.2 1.0 Video out level(no Loader) S-VIDEO out level Vp-p 2.0±0.2 2.0 Y(100% color bar) mv 700±140 700 C(100% color bar) mv 880±176 880 Audio out level CD 1KHz/0dB V 0.6±0.2 0.7 DVD 1KHz/0dB V 1.4±0.2 1.25-1.4 20Hz db ±3 0 Frequency Response (20 Hz 20 khz) 125Hz db ±3 0 10KHz db ±3 0 20KHz db ±3 0 Signal-to-noise ratio (add A) Infinity zero/-&db/l&r db 75 75 Audio distortion & noise 1KHz/0dB/L&R db -65-65 Dynamic range 1KHz/-60dB db 85 85 R/L Cross sound 1KHz/0dB/L&R db 45 45 1 khz Channel Unbalance 1KHz/0dB/L&R db 3 0 Power Consumption DC 9V Standby W 0 0 Rating (DVD+Monitor) W 12 12 Eccentricity A-BEX TDV-552 um 100 100 Scratch A-BEX TDV-541 mm 1.6 1.6 Black dot A-BEX TDV-PW525CW mm 0.8 0.8 Finger Print A-BEX TDV-PW525CW um 65 65 Vertical Deviation A-BEX TDV-MW533CW mm 0.6 0.6

HEADPHONE OUTPUT 1KHz,400mV mw 3±2 3 HEADPHONE Noise No Signal mv < 1mV < 1mV SPK MAX Output L 1KHz/0dB mw 500±100 500 (DVD) R 1KHz/0dB mw 500±100 500 SPK MAX Output L 1KHz/0dB mw 500±100 500 (AV IN) R 1KHz/0dB mw 500±100 500 HEADPHONE S/N (add A) SPK S/N (add A) Infinity zero/-&db/l&r Infinity zero/-&db/l&r db 75 75 db 50 50 20Hz db ±3 0 HEADPHONE RESP (20Hz~20KHz) 125Hz db ±3 0 10KHz db ±3 0 20KHz db ±3 0 20Hz db ±3 0 Amplifier Frep Resp (20Hz~20KHz) 125Hz db ±3 0 10KHz db ±3 0 20KHz db ±3 0

LCD BLOCK DIAGRAM

DVD PART

GENERAL ALIGNMENT INSTRUCTION The Main PCB of Monitor Modification: 1. Input voltage is 6.8V-16V, input signal is test circuit BY 5418. 2. Adjust VR1 to get good performance.

TROUBLESHOOTING SYMPTOM CAUSE REMEDY LCD MONITOR PART 1) No Picture Defective IC U2 Replace U2 ( VX1827 ) 2) No Picture, Picture no Defective IC AT8430. Replace. C AT8430 Good 3) Luminesce no good Defective IC U3 Replace U3 ( 4558/3414 ) 4) Color is no good Defective C214.C216.C218 Replace C214.C216.C218 ( 1UF ) 5) SYNC no good Defective IC U2 Replace U3 ( VX1827 ) 6) TINT no good Defective IC U2 Replace U3 ( VX1827 ) 7) NO Picture Defective IC U3 OR HV U1 Replace U3( VX1827 ) OR HV U1(MP1026) 8) Picture no good Defective Y1 Replace Y1 ( 20MHZ ) 9) Brightness no good Defective IC U3 Replace U3 ( 4558/3414 )

TROUBLESHOOTING SYMPTOM CAUSE REMEDY DVD PART 1) No Power Power source is not correct. The positive and negative does not match the unit. Replace power source. Charge the position of positive and negative. Power button defective. Replace power button. Defective triode IC U1 OR Q1 Replace U1 ( 8521 ) OR Q1 ( SI2307 ) 2) No Picture Defective IC T3 Defective IC U10 OR T4 Defective IC U2 Replace T3 ( 24C02 ). Replace U10(64M SDRAM) OR T4(FLASH:29LV800). Replace U2 ( MT1389E/E ) 3) No Sound Defective IC U6 Defective IC U5 4) Sound no good Defective IC U6 Defective IC U5 Defective V2 5) Can not read DISC Defective IC U3 Replace U6 ( C4558 ). Replace U5 ( TDA2822 ) Replace U6 ( C4558 ). Replace U5 ( TDA2822 ) Replace V2 ( 10KΩ ) Replace U3 ( CD5654 ) PICK-up Laser is defective. Replace pick up. Defective IC U2 Replace U2 ( MT1389E/E ) 6) No key function Defective IC U2 Replace U2 ( MT1389E/E ). 7) No remote control function Defective T1 Replace T1 Key is Defective. ( NTL6OH380AF3 ) Replace keys. 8) LCD NO Picture Defective U2 Replace U2 ( MT1389E/E )

Monitor Main PCB Top View PRINTED CIRCUIT BOARD

Monitor Main PCB Bottom View

Monitor HV PCB Top View Bottom View

DVD Main PCB TOP View

DVD Main PCB Bottom View

EXPLODED VIEW

IC VX1827 IC BLOCK DIAGRAM & DESCRIPTION

IC A8430K IC BLOCK DIAGRAM & DESCRIPTION

IC BLOCK DIAGRAM & DESCRIPTION

IC MBM29LV800BE IC BLOCK DIAGRAM & DESCRIPTION

IC K4S641632 IC BLOCK DIAGRAM & DESCRIPTION

IC BLOCK DIAGRAM & DESCRIPTION IC LS2822 PIN# PIN NAME TYPE DESCRIPTION 1 OSC I RC Oscillate Input 2 PD O Charge Control Output 3 Isen I Charge Current Sense Input 4 GND P Ground 5 LED O LED Status Output 6 Vsen I Charge Voltage Sense Input 7 Timer I Timer 8 VDD P 5 Volt Power

IC BLOCK DIAGRAM & DESCRIPTION IC TDA2822 BLOCK DIAGRAM SCHEMATIC DIAGRAM PIN CONFIGURATIONS

IC BLOCK DIAGRAM & DESCRIPTION IC S-8521F33 PIN# PIN NAME DESCRIPTION 1 ON/ OFF ON/OFF CONTROL PIN H : NORMAL L : STOP 2 VSS GND 3 VOUT OUTPUT VOLTAGE 4 EXT CONNECT EXTRA Crystal 5 VIN INPUT VOLTAGE

IC MP1026 IC BLOCK DIAGRAM & DESCRIPTION

Monitor Part SCHEMATIC DIAGRAMS

Monitor Part

Monitor Part Monitor HV BOARD

DVD Part