Trio™ Service Manual 0070-10-0591-01 1 - 5
Theory of Operation Hardware Overview
1.2.2 Power Supply Board (Lithium Ion Battery)
P/N 0671 -00-0051
Trio Power Supply board specifications:
• AC input voltage:110~240VAC+10%
• AC input current: <1.6A
• AC voltage frequency: 50/60+3HZ
• Two-way output voltage: 5V/12V, normal working current is 1.3A for 5V, 1.3A for
12V.
• Two-way output voltage has functions of short-circuit, over-current and over-voltage
protection.
• The power board has reset function.
• The power board can manage the charging process of li-ion battery (11.1V/4.4AH).
The charging time is 6.5 hours maximum.
FIGURE 1-4 Block diagram of Trio power supply board
Key Test Points
NO. NAME LOCATION FUNCTION
1Oscillator
frequency
Pin 4 of U1 Generate a oscillating frequency about 100kHZ
2 GND CC61 negative
electrode
Primary Ground
3 D-S waveform Q1.2 There is a waveform of about
100KHZ,107~354V between Q1.2 and the
negative electrode of C12
4Driving
waveform
Q1.1 There is a driving waveform of about 100KHZ,
15V between Q1.1 and the negative electrode of
C12
5 Rectified
waveform
D5 anode Secondary rectified voltage
6 VIN C18 positive
electrode
17.6V,provide input voltage for DC-DC
AC
input
AC/DC
Li-ion
Battery and
Charging
Managerent
circuit
12V output
REC POWER
SOURCE
Power on/off control
circuit
5VDC-DC
BUCK
converter
Voltage test
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