SERVICE MANUAL
PAGE:
2
SAFETY PRECAUTIONS
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth
ground (Water Pipe, Conduit, etc.) and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more
sensitivity.
Reverse plug of the AC cord into the AC outlet and repeat AC voltage measurements for each
exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS, which is,
corresponds to 0.5mA.
In case any measurement is out of the limits specified, there is possibility of shock hazard and
the set must be checked and repaired before it is returned to the customer.
Leakage Current Hot Check circuit
!! Important Safety Notice !!
Many electrical and mechanical parts in this chassis have special safety-related
characteristics.
These parts are identified by in the Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components
as recommended in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
Содержание HLT-3220
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Страница 22: ...SERVICE MANUAL PAGE 22 CIRCUIT DESCRIPTIONS 3 2 Pin configuration The right side ...
Страница 23: ...SERVICE MANUAL PAGE 23 CIRCUIT DESCRIPTIONS 4 Pin Functions General Interface Pins MCU CPU interface Pins ...
Страница 24: ...SERVICE MANUAL PAGE 24 CIRCUIT DESCRIPTIONS SDRAM SGRAN interface Pins ...
Страница 25: ...SERVICE MANUAL PAGE 25 CIRCUIT DESCRIPTIONS 1 Main Input Interface input pins for Main stream ...
Страница 26: ...SERVICE MANUAL PAGE 26 CIRCUIT DESCRIPTIONS 2 Main Input Interface input pins for Main stream ...
Страница 27: ...SERVICE MANUAL PAGE 27 CIRCUIT DESCRIPTIONS Sub Input Interface input pins for Sub stream ...
Страница 28: ...SERVICE MANUAL PAGE 28 CIRCUIT DESCRIPTIONS Display output interface ...
Страница 30: ...SERVICE MANUAL PAGE 30 CIRCUIT DESCRIPTIONS Power ground pins ...
Страница 32: ...SERVICE MANUAL PAGE 32 CIRCUIT DESCRIPTIONS 3 Pin configuration Pin configuration PMQFP64 Logic symbol ...
Страница 33: ...SERVICE MANUAL PAGE 33 CIRCUIT DESCRIPTIONS 4 Pin Port Functions ...
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Страница 36: ...SERVICE MANUAL PAGE 36 CIRCUIT DESCRIPTIONS 3 Pin configuration ...
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Страница 39: ...SERVICE MANUAL PAGE 39 CIRCUIT DESCRIPTIONS 2 Block Diagram ...
Страница 40: ...SERVICE MANUAL PAGE 40 CIRCUIT DESCRIPTIONS 3 Pin configurations ...
Страница 41: ...SERVICE MANUAL PAGE 41 CIRCUIT DESCRIPTIONS 4 1 Pin Functions ...
Страница 42: ...SERVICE MANUAL PAGE 42 CIRCUIT DESCRIPTIONS 4 2 Pin Functions ...
Страница 43: ...SERVICE MANUAL PAGE 43 CIRCUIT DESCRIPTIONS 4 3 Pin Functions ...
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Страница 45: ...SERVICE MANUAL PAGE 45 CIRCUIT DESCRIPTIONS 4 5 Pin Functions ...
Страница 47: ...SERVICE MANUAL PAGE 47 CIRCUIT DESCRIPTIONS 3 Pin configurations ...
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Страница 49: ...SERVICE MANUAL PAGE 49 CIRCUIT DESCRIPTIONS ...
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Страница 64: ...SERVICE MANUAL PAGE 64 PCB LAYOUT 3 1 Main PCB TOP COMP ...
Страница 65: ...SERVICE MANUAL PAGE 65 PCB LAYOUT 3 2 Main PCB TOP PATTEN ...
Страница 66: ...SERVICE MANUAL PAGE 66 PCB LAYOUT 3 3 Main PCB BOTTOM COMP ...
Страница 67: ...SERVICE MANUAL PAGE 67 PCB LAYOUT 3 4 Main PCB BOTTOM PATTEN ...
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