20
10.2. +10V power
Fig. 15 shows the +10V power supply.
+10V is generated from the input power supply of 12V by the 3-terminal regulator of IC7.
Fig.15 +10V Power Circuit
11. INVERTER CIRCUIT
The Inverter circuit board supplies the high voltage AC to the cold-cathode fluorescent tube
used as backlight illumination for the TFT panel.
The Inverter circuit is supplied the voltage from CN20 on the Main PWB and it gives to the cold-
cathode fluorescent tube. The lighting level control can be varied by turning VR50.
(Note)
(1) Inverter circuit is very dengerous because it is outputted the high voltage(max AC1300V).
Make sure that the monitor's power switch is in the OFF position when servicing Inverter
circuit board.
(2) Inverter circuit board can not be replaced. It needs to be replaced when it is failed.
Summary of Contents for QD-101MM
Page 39: ...38 6 CIRCUIT DIAGRAM PWB Fig 27 CIRCUIT DIAGRAM MAIN CIRCUIT No 1 ...
Page 40: ...39 Fig 27 CIRCUIT DIAGRAM MAIN CIRCUIT No 1 ...
Page 41: ...40 Fig 28 CIRCUIT DIAGRAM MAIN CIRCUIT No 2 ...
Page 42: ...41 Fig 28 CIRCUIT DIAGRAM MAIN CIRCUIT No 2 ...
Page 43: ...42 Fig 29 CIRCUIT DIAGRAM MAIN CIRCUIT No 3 ...
Page 44: ...43 Fig 29 CIRCUIT DIAGRAM MAIN CIRCUIT No 3 ...
Page 45: ...44 Fig 30 CIRCUIT DIAGRAM MAIN CIRCUIT No 4 ...
Page 46: ...45 Fig 30 CIRCUIT DIAGRAM MAIN CIRCUIT No 4 ...
Page 47: ...46 Fig 31 CIRCUIT DIAGRAM POWER CIRCUIT ...
Page 48: ...47 Fig 31 CIRCUIT DIAGRAM POWER CIRCUIT ...
Page 49: ...48 Fig 32 CIRCUIT DIAGRAM VIDEO CIRCUIT ...
Page 50: ...49 Fig 32 CIRCUIT DIAGRAM VIDEO CIRCUIT ...
Page 51: ...50 Fig 33 CIRCUIT DIAGRAM AUDIO CIRCUIT ...
Page 52: ...51 Fig 33 CIRCUIT DIAGRAM AUDIO CIRCUIT ...
Page 53: ...52 Fig 34 PWB PATTERN MAIN PWB FRONT SIDE ...
Page 54: ...53 Fig 34 PWB PATTERN MAIN PWB REAR SIDE ...
Page 66: ...PRINTED IN GERMANY ...