JHL90 Service Manual
3.11.3 On board RTC battery:
• Maxell ML1220T13 3V/14mAH Lithium
• Sanyo ML1220T28 3V/15mAH Lithium
• Panasonic ML1220/B 3V/17mAH Lithium
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions.
4. INVERTER SPECIFICATION
JHL90/91 15.4 inch inverter spec
Description
This inverter is designed to light up the CCFL of LCD for JHL90/91 notebook.
This inverter is designed to light up the CCFL of LCD for notebook. It should be
supported JHL90/91 15.4 LCD panels. There are two control signals that come
from 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 a
rate of 150Hz. The effective brightness is a function of the duty cycle.
4.1 Features
• Wide range 9V to 21V input voltage
• Brightness adjustment by PWM burst mode.
• Close loop controls lamp current.
4.2 Absolute maximum rating
• Environment Temperature:
Operating temperature: 0°C ~ 55°C
4-12
To Next Page
Loading...
