Testing Printer Dpp-350; Testing Charging Of Li-Ion Battery (7.4V/2000Mah) - Infinite Peripherals DPP-350 Work Instructions

1 DATECS

8. Testing Printer DPP-350

8.1 testing of charging of LiIon battery (7.4V/2000mAh)
Before the device assembly is tested the charging of LiIon battery.
For this connect
• • • • •
battery to connector CN4
• • • • •
adapter 9V/1A, plugged in main supply, connector to CN5 (fig.71).
Lightguide LED1 on Main PCB starts to shine in red color and with
the help of multimeter measure the fall of resistor R29 – 0.15Ω. If is
registered voltage in the range from 10mV to 100mV (fig.72) and with
an oscilloscope are registered oscillations at the output of the IC (input
of coil L1) , these should be with frequency and amplitude as shown
on fig.73, (to be present), this means that the IC responsible for LiIon
battery charging works OK and battery is being charged with the
necessary current.
When battery is fully charged LED1 starts to shine in green!
EN ISO 9001:2000
WORK INSTRUCTIONS
model: DPP-350 edition: 02
Fig.71
Fig.73
identif.No: WI 07.01.52
Version: 2
Page. 24 from . 30
Fig.72