Notes When Using Service Manual - Hitachi DZ-GX20MA Service Manual

Safety Precaution for Repair > Notes When Using Service Manual

1-5 Notes When Using Service Manual

(1) Value units used in parts list
Certain symbols are indicated as shown below for value units of resistors, capacitors and coils in
parts list. When you read them, note the following regular indications:
Parts Indication in list
KOHM ......................................... k
Resistor
UF ................................................ µF
Capacitor
PF ................................................ pF
UH ............................................... µH
Coil
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.
Certain symbols are indicated for value units: When you read them note the regular indications in
tables below:
[Resistors]
Item
No indication ..............................
Value
K .................................................. k
M ................................................. M
No indication .............................. ±5%
Tolerance
(All tolerances other than ±5% are
indicated in schematic diagrams)
No indication .............................. 1/8W
Power
capacitance (1/16 W for leadless resistors with no
indication)
All capacitances other than the above
are indicated in schematic diagrams.
(3) Identifying sides A/B in circuit board diagrams
1) Board with pattern on one side only and parts on both sides:
Side A: Shows discrete parts.
Side B: Shows leadless parts, viewed from the pattern side.
2) Board with patterns and parts on both sides:
Side A: Shows parts and patterns which can be seen when the case is opened.
Side B: Shows the parts and the pattern on the back of side A.
Regular indication
Indication
1 - 5
[Capacitors]
Item
No indication .............................. µF
Value
P .................................................. pF
No indication .............................. 50V
Dielectric
strength (All dielectric strengths other than
50 V are indicated in schematic
diagrams)
[Coils]
Item
µ ................................................... µH
Value
m .................................................. mH
Indication
Indication