Sharp VC-G200SM, Service Manual

Page: 32 / 144

32
VC-G20SM/G200SM
VC-G201SM/G401SM
Power Circuit ADJUSTMENT
ADJUSTMENT OF Output Voltage Confirm
ADJUSTMENT OF Over Load Characteristic
Confirmation
Item Test point Specification Fix Load
AT 12V AT between 12Vline~GND Output above 11.0V 2.0~2.2A(over load)
AT 25V AT between 25.5Vline~GND Output above 25.0V
Measuring
instrument Oscilloscope
ADJUSTMENT OF Power Consumption Con-
firmation
Item Test point Specification Fix Load
AT 12V AT between 12Vline~GND DC 12.5V
±
0.3V 360mA+actual load
AT 5V AT between 5Vline~GND DC 5.25V
±
0.1V 18mA+actual load
AT 39V AT between 39Vline~GND DC 39.0V
±
2.0V actual load
AT 25V AT between 25.5Vline~GND DC 26.0V
±
1.0V actual load
Measuring
instrument Digital Voltmeter
<Setting Condition>
1. Power Supply : AC190V(50Hz)
2. Surroung temperature Setting : 20ºC
±
10ºC
3. Load connect place : between AT 5V
→
AC connector
8
PIN~AC connector
1
PIN
(High speed) : between
AT25.5V
→
AC
5
PIN~AC
2
PIN
(Other model) : between
AT12V
→
AC
5
PIN~AC
2
PIN
When apply the over load at the AT12V/AT25.5V output
for every 170msec, confirm that the output is 11.0V/25.0V
for every time.
70 100
2.2A
0.65A
(A)
(msec)
Measuring
instrument
Mode
Fix Load
Power Consumption device
Power off
actual load
Test point AC Plug
Specification 3.0W MAX
1.Power supply : AC230V(50Hz)
2.Surround Temperature Setting : 20ºC
±
10ºC