Sharp VC-MH705HM/LM Service Manual page 15

VC-MH705HM/LM
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VC-MH815HM/LM,MH85HM
VC-MH715HM,MH835HM
Power Circuit ADJUSTMENT
ADJUSTMENT OF Output Voltage Confirm
Measuring Digital Voltmeter
instrument
Item Test point
AT 12V AT between 12Vline~GND
AT 5V AT between 5Vline~GND
AT 39V AT between 39Vline~GND
AT 25.0V AT between 25.5Vline~GND DC 26.0V±0.5V
<Setting Condition>
1. Power Supply : AC190V(50Hz)
2. SURROUND temperature Setting : 20ºC±10ºC
3. load connect place : between AT 5V→AC connector
8PIN~AC connector1PIN
(High speed) : between AT25.5V→AC5PIN~AC2PIN
(Other model) : between AT12V→AC5PIN~AC2PIN
ADJUSTMENT OF Over Load Characteristic
Confirmation
Measuring Osiloscope
instrument
Item Test point
AT 12V AT between 12Vline~GND
AT 25.0V AT between 25.5Vline~GND Output above 25.0V
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.
(A)
2.2A
0.65A
70 100
Specification Fix Load
DC 12.5V±0.3V 360mA+actual load
DC 5.25V±0.1V 18mA+actual load
DC 39.0V±2.0V actual load
actual load
Specification Fix Load
Output above 11.0V 2.0~2.2A(over load)
(msec)
Digitized in Heiloo the Netherlands
ADJUSTMENT OF Power Consumption Con-
firmation
Measuring Power Consumption device
instrument
Mode Power off
Fix Load actual load
Test point AC Plug
Specification 3.0W MAX
1.Power supply : AC230V(50Hz)
2.Surround Temperature Setting : 20ºC±10ºC
34
6/17/2019
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