HITACHI CMP5000WXE CMP5000WXJ CMP5000WXU PLASMA TV SERVICE M

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1.2 PRODUCT SAFETY NOTICE
Leakage Current Cold Check
With the AC plug removed from an AC power source, place a jumper across the two plug prongs. Turn the AC power switch on. Using an insulation tester (DC 500V), connect one lead to the jumpered AC plug and touch the other lead to each exposed metal part (input/output terminals, screwheads, metal overlays, control shafts, etc.), particularly any exposed metal part having a return path to the chassis. Exposed metal parts having a return path to the chassis should have a minimum resistor reading of 0.3M and a maximum resistor reading of 5M. Any resistor value below or above this range indicates an abnormality which requires corrective action. Exposed metal parts not having a return path to the chassis will indicate an open circuit. Many electrical and mechanical parts in HITACHI set have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for higher voltage, wattage, etc. R
eplacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking on the schematics and on the parts list in this Service with a Manual. The use of a substitute replacement component which dose not have the same safety characteristics as the HITACHI recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire or other hazards. Product Safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current HITACHI Service Manual. A subscription to, or additional copies of, HITACHI Service Manual may be obtained at a nominal charge from HITACHI.

Leakage Current Hot Check
Plug the AC line cord directly into an AC power source (do not use an isolation transformer for this check). Turn the AC power switch on. Using a "Leakage Current Tester (Simpson Model 229 equivalent)", measure for current from all exposed metal parts of the cabinet (input/output terminals, screwheads, metal overlays, control shaft, etc.), particularly any exposed metal part having a return path to the chassis, to a known earth ground (water pipe, conduit, etc.). Any current measured must not exceed 0.5mA.

Device under test
Test all exposed metal surfaces

Leakage current tester

Reading should not be above 0.5 mA

Also test with plug reversed (Using AC adapter plug as required) Earth ground

AC Leakage Test
ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE SET TO THE CUSTOMER.

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1.3 CHARGED SECTION AND HIGH VOLTAGE GENERATING POINT
7 Charged Section
The places where the commercial AC power is used without passing through the power supply transformer. If the places are touched, there is a risk of electric shock. In addition, the measuring equipment can be damaged if it is connected to the GND of the charged section and the GND of the non-charged section while connecting the set directly to the commercial AC power supply. Therefore, be sure to connect the set via an insulated transformer and supply the current.

7 High Voltage Generating Point
The places where voltage is 100V or more except for the charged places described above. If the places are touched, there is a risk of electric shock. 1. SW POWER SUPPLY Module ...................................... (225V) 2. X DRIVE Assy .............................................. (­300V to 225V) 3. Y DRIVE Assy ............................................................... (355V) 4. SCAN (A) Assy .............................................................. (355V) 5. SCAN (B) Assy ............................................................... (355V) 6. X CONNECTOR (A) Assy ........................... (­300V to 225V) 7. X CONNECTOR (B) Assy ............................ (­300V to 225V)

1. AC Power Cord 2. AC Inlet with Filter 3. Power Switch (S1) 4. Fuse (In the SW POWER SUPPLY Module) 5. STB Transformer and Converter Transformer (In the SW POWER SUPPLY Module) 6. Other primary side of the SW POWER SUPPLY Module

Y DRIVE Assy

: Part is Charged Section. : Part is the High Voltage Generating Points other than the Charged Section.

SCAN (A) Assy

Top
SCAN (B) Assy

Front

X CONNECTOR (A) Assy

X DRIVE Assy

X CONNECTOR (B) Assy SW POWER SUPPLY Module Power Switch (S1) AC Inlet with Filter Power Cord

Fig.1 Charged Section and High Voltage Generating Point (Rear View)

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MEMO

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