Hitachi C21-RF80S Service Manual - Page 16

Service Adjustments - tv

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SERVICE ADJUSTMENTS ALIGNMENT INSTRUCTION (3P31) Before Servicing The TV Set The main power is 100~240V 50/60HZ . Please be careful when you are servicing. Don t short any two soldering points, which should not be shorted and don t touch any components, which should not be touched. Please disconnect the power plug form the wall outlet before servicing. For safety reasons, all components replaced should be identical with BOM. Before alignment, ensure the TV set has heat run for at least 30 minutes and degauss the CRT thoroughly with demagnetizer. The data of EEPROM must be stored before the adjustment for main chassis. Tools And Equipment For Adjustment Small - Screwdriver Without Inductance Pattern Generator DC Regulated power supply Digital Voltmeter Sweep Signal Generator 20MHz 2-channel Oscilloscope Power Adjustment Connect a 100W bulb across C616 and AC 200V power to CN601. If the bulb lights up,the voltage is normal and power is ok, else please proceed servicing. -16-

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-16-
Tools And Equipment For Adjustment
Before Servicing The TV Set
SERVICE ADJUSTMENTS
ALIGNMENT INSTRUCTION (3P31)
The main power is 100~240V 50/60HZ . Please be careful when you are servicing.
Don t short any two soldering points, which should not be shorted and don t
touch any
components, which should not be touched.
Please disconnect the power plug form the wall outlet before servicing.
For safety reasons, all components replaced should be identical with BOM.
Before alignment, ensure the TV set has heat run for at least 30 minutes and degauss the
CRT thoroughly with demagnetizer.
The data of EEPROM must be
stored before the adjustment for main chassis.
Small
-
Screwdriver Without Inductance
Pattern Generator
DC Regulated power supply
Digital Voltmeter
Sweep Signal Generator
20MHz 2-channel Oscilloscope
Power Adjustment
Connect a 100W bulb across C616
and AC 200V power to CN601. If the bulb lights
up,the voltage is normal and power is ok, else please proceed servicing.