Acer Travelmate 290 Service Guide
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Chapter 123 Video Interface ItemSpecification Video vendor Intel Video name Intel 855GM GMCH Chip voltage Core/1.2V Supports ZV (Zoomed Video) port No Video Resolution Mode (for both LCD and CRT) Resolution16 bits (High color)32 bits (True color) 1024*768 Yes Yes 1400*1050 (SXGA) Yes Yes 1600*1200 (UXGA) Yes Yes 1280*1024 (Monitor) Yes Yes Parallel Port ItemSpecification Parallel port controller SMSC LPC47N227 Number of parallel port One Location Rear side Connector type 25-pin D-type...
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24Chapter 1 Number of slots One type-II Access location Left panel Supports ZV (Zoomed Video) port No ZV support Supports 32 bit CardBus Yes System Board Major Chips Item Controller System core logic Intel 855GM and ICH4-M Super I/O controller SMSC 47N227, LPC interface Audio controller Realtek ALC202 Codec Video controller Intel 855GM GMCH Hard disk drive controller ICH4-M Keyboard controller NS 87591L RTC ICH4-M Keyboard ItemSpecification Keyboard controller NS 87591L Keyboard vendor & model name...
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Chapter 125 There are two control signals that come form system to control lamp brightness. One signal is named DAC_BRIG, which limits current to meet LCD lamp current specification. Another one is named PWM, which adjusts lamp brightness. This inverter brightness is adjusted by PWM burst mode. The PWM burst mode is that turning on and off the lamp at rate of 150Hz. The effective brightness is a function of the duty cycle. Features 1. Wide range 9V to 21V input voltage. 2. Birghtness adjustment by...
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26Chapter 1 Electrical Characteristics No .ParameterSymbolMin.Ty p .Max.UnitComment 1Input voltageNV_PWR 9 14.8 21 V 7.5V (continuous) can work *Note 1 2Input currentIin -- 0.33 -- A 3 Lamp currentIL 3.0 -- 6.8 mA DAC=0V *Note 2 4 Lamp currentIL 2.7 -- 6.3 mA DAC=1V 4 Frequency F 45 55 65 KHz * Note 3 5 Output powerPout -- -- 4.5 W 6 Efficiencyη80% -- -- -- 7 Starting voltageVs 1600 -- --- V At 0’C 8 Starting timeTvs 1 -- 1.5 Sec 9 Dispoff# 2.8 3.3 3.6 V Backlight on/off signal 0 0.5 0.8 V Low...
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Chapter 127
NOTE:
*1. The inverter can work in 7.5V input voltage (continuous), but 7.5V electronic characteristic will
not be care.
*2. Limited lamp maximum current by DAC_BRIC signal:
When DAC_BRIG voltage is 0V and INV_PWM enables (100%), lamp has max. current.
When DAC_BRIG voltage is 3.3V and INV_PWM enables (100%), lamp has min. current.
When add 1V DAC, the 100% Lamp current will decrease 0.5mA.
DAC_BRIG signal comes from system chipset with internal resistance of 3K
*3....
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28Chapter 1 All components on inverter board should follow below rules: 1. Component using conditions (component stress) must be within component specification including voltage rating, current rating, temperature etc. 2. Component temperature should follow below: T∆T
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Chapter 129 Frequency variation range (Hz) 47 - 63 Nominal voltages (Vrms) 90 - 264 Inrush current The maximum inrush current will be less than 50A and 100A when the adapter is connected to 115Vac(60Hz) and 240Vac(50Hz) respectively. Efficiency High efficiency 86% minimum, at 100~240Vac AC input, full load, warm-up condition. Output Ratings (CV mode) DC output voltage Offers constant voltage 19.0V output source with 60W max output power capacity. Noise + Ripple 380mvp-pmax (20MHz bandwidth) for...
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30Chapter 1 Operating +5 ~ +35°C Non-operating -20 ~ +65 °C Non-operating -20 ~ +65 °C (storage package) Humidity Operating 10% to 90% without condensation Non-operating 10% to 90% RH, non-condensing (unpacked) Non-operating 10% to 90% RH, non-condensing (storage package) Vibration Operating (unpacked) 5 ~ 500Hz: 0.9G Non-operating (unpacked) 5 ~ 500Hz: 1.3G Mechanical Specification ItemSpecification Dimensions 330mm (W) x 273mm (D) x 31.7mm (H) for 14.1/15.0 inch model Weight 6.11lb (2.77kg) for...
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Chapter 131 002E-002F Motherboard resources 0030-0031 Motherboard resources 0034-0035 Motherboard resources 0038-0039 Motherboard resources 003C-003D Motherboard resources 0040-0043 System timer 004C-004F Motherboard resources 0050-0053 Motherboard resources 0060-0060 Standard 101/102-Key or Microsoft Natural PS/2 Keyboard 0061-0061 System speaker 0062-0062 Microsoft ACPI-Compliant Embedded Controller 0064-0064 Standard 101/102-Key or Microsoft Natural PS/2 Keyboard 0066-0066 Microsoft ACPI-Compliant...
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32Chapter 1 1200-121F Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2 1300-133F Motherboard resources 1400-141F Intel(R) 82801DB/DBM SMBus Controller - 24C3 1600-161F Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4 1700-171F Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7 C000-C0FF Realtek RTL8139/810x Family Fast Ethernet NIC C100-C17F VIA OHCI Compliant IEEE 1394 Host Controller E000-E007 Intel(R) 82852/82855 GM/GME Graphics Controller E100-E1FF Realtek AC’97 Audio...