Philips BDP9000, Руководство по обслуживанию

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Safety Instructions, Warnings and Notes BDP9000 2. EN 3
2. Safety Instructions, Warnings and Notes
2.1. Safety Instructions
2.1.1. Safety components
Replace safety components, indicated by the symbol , only by components identical to the original ones. Any other component
substitution (other than original type) may increase risk of fire or electrical shock hazard.
2.1.2. After repair
•
Safety regulations require that after a repair, the set must be returned in its original condition.
•
Before returning the BDP9000 to the customer always do a safety check. Pay attention to the built-in protective devices, leakage
current and insulation resistance.
2.2. Warnings
2.2.1. General
Never replace modules or other components while the unit is switched “on”.
2.2.2. ESD Protection
All ICs and many other semi-conductors are susceptible to electrostatic discharges (ESD). Careless handling during
repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the
mass of the set via a wrist wrap with resistance. Keep components and tools also at this potential.
2.3. Notes
2.3.1. Handling of the optical pick-up
The laser diode in the optical pick-up may suffer electrical breakdown because of potential static electricity from clothing and your body.
The following method is recommended to prevent damage:
1. Place a conductive sheet on the work bench. You can use the black sheet that is used to wrap repair parts.
2. Place the set on the conductive sheet to ground the chassis to the sheet.
3. Place your hands on the conductive sheet to give them the same ground as the sheet.
4. Remove the optical pick-up block.
5. Perform work on top of the conductive sheet. Be careful not to touch the unit with your clothes or any other static objects.
6. Short the short terminal on the PCB in the pick-up assembly before you lift or remove the pick-up assembly.
7. After replacing the pick-up assembly, open the short terminal on the PCB.
2.3.2. Schematic notes
•
All resistor values are in ohms, and the value multiplier is often used to indicate the decimal point location (e.g. 2K2 indicates
2.2 kohm).
•
Resistor values with no multiplier may be indicated with either an "E" or an "R" (e.g. 220E or 220R indicates 220 ohm).
•
All capacitor values are given in micro-farads (µ = x10
-6
), nano-farads (n = x10
-9
), or pico-farads (p = x10
-12
).
•
Capacitor values may also use the value multiplier as the decimal point indication (e.g. 2p2 indicates 2.2 pF).
•
An "asterisk" (*) indicates component usage varies. Refer to the diversity tables for the correct values.
•
The correct component values are listed in the Spare Parts List. Therefore, always check this list when there is any doubt.