Advertisement
Quick Links
Advertisement
Summary of Contents for MPMan PDV-78
-
Page 1: Service Manual
Service Manual (7 Inch) LCD Color Monitor & DVD Player MODEL :PDV-78... -
Page 2: Table Of Contents
1、Specification .............…..........………………… 2、Block Diagram .........…..............…………………. 3、General Alignment Instruction ..............……………..….. 4、Troubleshooting ..................……………………….. 5、Printed Circuit Board ..................…………………... 6、Explode View ......................…………………. 7、IC Block Diagram and Lead Identification .............……………….. 8、Schematic Diagram ..................…………………….. -
Page 3: Specification
SPECIFICATION Result Description Condition Unit Limit Nominal Vp-p 0.7±0.1 Video Signal Level Vp-p 0.3±0.1 SYNC Lever 75% color bar, 75 Vp-p 1.0±0.2 Video out level Video out level (No Loader) Vp-p 2.0±0.2 Y(100% color bar ) 700±140 S-VIDEO out level C(100% color bar ) 880±176 1KHz/0dB... - Page 4 3±2 HEADPHONE OUTPUT 1KHz,400mV No Signal ﹤1mV ﹤1mV HEADPHONE Noise SPK MAX Output 1KHz/0dB 500±100 (DVD) 1KHz/0dB 500±100 SPK MAX Output 1KHz/0dB 500±100 (AV IN) 1KHz/0dB 500±100 Infinity HEADPHONE S/N ≥75 (add A) zero/-&dB/L&R SPK S/N Infinity ≥50 (add A) zero/-&dB/L&R 20Hz ≤±3...
-
Page 5: Block Diagram
BLOCK DIAGRAM... - Page 6 DVD PART...
-
Page 7: General Alignment Instruction
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. -
Page 8: Troubleshooting
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... - Page 9 TROUBLESHOOTING SYMPTOM CAUSE REMEDY DVD PART 1) No Power Power source is not correct. Replace power source. The positive and negative does Charge the position of positive not match the unit. and negative. Power button defective. Replace power button. Defective triode IC U1 OR Q1 Replace U1 ( 8521 ) OR Q1 ( SI2307 ) 2) No Picture...
-
Page 10: Printed Circuit Board
PRINTED CIRCUIT BOARD Monitor Main PCB Top View... - Page 11 Monitor Main PCB Bottom View...
- Page 12 Monitor HV PCB Top View Bottom View...
- Page 13 DVD Main PCB TOP View...
- Page 14 DVD Main PCB Bottom View...
-
Page 15: Explode View
EXPLODED VIEW... - Page 16 IC BLOCK DIAGRAM & DESCRIPTION IC VX1827...
- Page 17 IC BLOCK DIAGRAM & DESCRIPTION IC VX1827...
- Page 18 IC BLOCK DIAGRAM & DESCRIPTION IC VX1827...
- Page 19 IC BLOCK DIAGRAM & DESCRIPTION IC A8430K...
- Page 20 IC BLOCK DIAGRAM & DESCRIPTION...
- Page 21 IC BLOCK DIAGRAM & DESCRIPTION...
- Page 22 IC BLOCK DIAGRAM & DESCRIPTION...
- Page 23 IC BLOCK DIAGRAM & DESCRIPTION...
- Page 24 IC BLOCK DIAGRAM & DESCRIPTION IC MBM29LV800BE...
- Page 25 IC BLOCK DIAGRAM & DESCRIPTION IC MBM29LV800BE...
- Page 26 IC BLOCK DIAGRAM & DESCRIPTION IC K4S641632...
- Page 27 IC BLOCK DIAGRAM & DESCRIPTION IC K4S641632...
- Page 28 IC BLOCK DIAGRAM & DESCRIPTION IC LS2822 PIN# PIN NAME TYPE DESCRIPTION RC Oscillate Input Charge Control Output Isen Charge Current Sense Input Ground LED Status Output Vsen Charge Voltage Sense Input Timer Timer 5 Volt Power...
-
Page 29: Schematic Diagram
IC BLOCK DIAGRAM & DESCRIPTION IC TDA2822 BLOCK DIAGRAM SCHEMATIC DIAGRAM PIN CONFIGURATIONS... - Page 30 IC BLOCK DIAGRAM & DESCRIPTION IC S-8521F33 PIN# PIN NAME DESCRIPTION ON/ OFF ON/OFF CONTROL PIN “H”: NORMAL “L”: STOP VOUT OUTPUT VOLTAGE CONNECT EXTRA Crystal INPUT VOLTAGE...
- Page 31 IC BLOCK DIAGRAM & DESCRIPTION IC MP1026...
- Page 32 SCHEMATIC DIAGRAMS Monitor Part...
- Page 33 Monitor Part...
- Page 34 Monitor Part...
- Page 35 Monitor Part Monitor HV BOARD...
- Page 36 DVD Part...
- Page 37 DVD Part...
- Page 38 DVD Part...
- Page 39 DVD Part...
- Page 40 DVD Part...
- Page 41 DVD Part...
Need help?
Do you have a question about the PDV-78 and is the answer not in the manual?
Questions and answers