Hitachi DV-PF3A(S), Руководство по обслуживанию

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1-7
1-4 NOTES WHEN USING SERVICE MANUAL
The following shows the contents to be noted when using service manual:
Standard Notes
WARNING
Many electrical and mechanical parts in this chassis
have special characteristics. These characteristics
often pass unnoticed and the protection afforded by
them cannot necessarily be obtained by using replace-
ment components rated for higher voltage, wattage,
etc. Replacement parts that have these special safety
characteristics are identified in this manual and its
supplements; electrical components having such fea-
tures are identified by the mark "
!
" in the schematic
diagram and the parts list. Before replacing any of
these components, read the parts list in this manual
carefully. The use of substitute replacement parts that
do not have the same safety characteristics as speci-
fied in the parts list may create shock, fire, or other
hazards.
Capacitor Temperature Markings
Capacitors and transistors are represented by the fol-
lowing symbols.
Notes:
1. Do not use the part number shown on these draw-
ings for ordering. The correct part number is shown
in the parts list, and may be slightly different or
amended since these drawings were prepared.
2. All voltages are DC voltages unless otherwise
specified.
Values in schematic diagrams
The values, dielectric strength ( power capacitance )
and tolerances of the resistors ( excluding variable
resistors ) and capacitors are indicated in the sche-
matic diagrams using abbreviations.
Mark
Capacity
change rate
Standard
temperature
Temperature
range
(B)
±
10% 20°C -25~+85°C
(F) +30 - 80% 20°C -25~+85°C
(SR)
±
15% 20°C -25~+85°C
(Z) +30 - 80% 20°C -10~+70°C
(Top View) (Bottom View)
(Bottom View)
Electrolytic Capacitor
+
Transistor or Digital Transistor
NPN
Transistor PNP
Transistor
NPN Digital
Transistor PNP Digital
Transistor
(Top View)
(Top View)
E C B
E C B
Digital Transistor
CBA Symbols
Schematic Diagram Symbols
E C B
(Top View)
(Top View)
E C B
E C B
[ Resistors ]
Item Indication
Value
No indication...........................
K............................................k
M..........................................M
Power
capacitance
No indication............1/4W,1/6W
All capacitances other than the
above are indicated in schematic
diagrams.
[ Capacitors ]
Item Indication
Value
No indication........................... F
P..............................................pF
Dielectric
strength
No indication...........................50V
All dielectric strengths other than
50V are indicated in schematic
diagrams.
[ Coils ]
Item Indication
Value
...............................................
m.............................................mH
H