HITACHI VKM212E
Manual de Servicio

Notes When Using Service Manual
The following shows the contents to be noted when using service manual:

1. Value units used in parts list
Certain symbols are indicated below for value units of resistors, capacitors and coils in parts list. When you read them note the following regular indications: Parts Resistor Capacitor Coil Indication in list Regular indication

3. Identifications of sides A/B in circuit board diagrams
1) Board having a pattern on one side and parts on both sides. Side A: Shows discrete parts, viewed from the pattern side. Side B: Shows leadless parts, viewed from the pattern side. 2) Board having patterns on both sides and parts on both sides. Side A: Shows parts and patterns which can be seen when the case is opened. Side B: Shows parts and the pattern on the back of side A.

KOHM ........................................... k UF ................................................ µF PF ................................................ pF UH ................................................ µH MH ............................................... mH

2. Values in schematic diagrams
The values, dielectric strength (power capacitance) and tolerances of the resistors (excluding variable resistors) and capacitors are indicated in the schematic diagrams using abbreviations. [Resistors] Item Value Indication No indication ................................... K ................................................... k M .................................................. M No indication ............................. ±5% Tolerance (All tolerances other than ±5% are indicated in schematic diagrams) No indication ............................ 1/8W Power capacitance (1/16W for leadless resistors without indication) All capacitances other than the above are indicated in schematic diagrams. [Capacitors] Item Value Dielectric strength Indication No indication ................................. µF P ................................................... pF No indication .............................. 50V (All dielectric strengths other than 50V are indicated in schematic diagrams)

[Coils] Item Value Indication µ .................................................... µH m .................................................. mH

CAUTIONS