Acer AL1731, Руководство по обслуживанию

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2.7.6 Power Connector
All units shall have an IEC/CEE-22 type male power receptacle.
2.7.7 Inverter & DC/DC Board (VP-903)
1.Hydis / HT17E12-200 (Condition:Ta=25 )
℃
No. Item Sym Condition Min Typ. Max. Unit
1 Input Voltage Vin 11.4 12 12.6 V
2 Lamp Voltage VLamp Vin=12V,ILAMP= 7.5mA - 700 -
Vrms
3 Luminance Bmax Center of screen, 6.5mA for
each lamp.
250 - cd/m^2
4 Working Frequency Fo 40 60 KHz
5 Lamp Current ILAMP 3 6.5 6.9 mA
ON Normal Operation 1.5 3.3
V
6
Backlight ON/OFF
Control
OFF Shutdown (Lamp off) 0 1.0 V
7 Brightness control
range(positive
adjustment) 0 - 3.1 V
8 Lamp Current Balance
, each two output of
transformer IL1-IL2 Two output of one
transformer +/-0.5
mA
9
Open Lamp Volt. Vopen Vin=12V, 0degC 1600 - --
Vrms
10
Efficiency
- Vin=12V,maximum brightness 75 - - %
11 Strike Lamp time
Ts Vin=12V, ON/OFF=0V 40 60 80
ms
12
Delay Time for Open
Lamp Protection
/each lamp
Topen
Vin=12V, each lamp is
disconnected
-- 1000 ms
13 Audible Noise 30mm upon the part - - 34 dBm
2.Pin Assignments
2-1 Output Connector#1 (J802 / E&T 4500-09 / 9P P2.0)
Pin No.
Symbol Description
1
+5Vaudio +5Vdc for Audio ckt
2
GND/Audio Ground for Audio ckt
3,4
GND Common Ground
5
Brightness Brightness adjustable range: 0 V<min> ~ 3. 1 V<max>
6
Enable
Backlight ON/OFF control (Active High)
ON:1.5~3.3V, OFF:-0.3~1.0V
7,8
Vcpu +5Vdc supply to micro-P, always on.
9
Vcc +12 Vdc supply to mainboard.
2-2. Output Connector#2 (for CCFLs , J940,J980,J941,J981)