Schematic And Block Diagrams/Cba's; Schematic Diagrams/Cba's And Test Points - Hitachi SM9303 Service Manual

SCHEMATIC AND BLOCK DIAGRAMS/CBA'S

1 SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS
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
Capacity
Mark
change rate temperature
±
(B) 10%
(F) +30 - 80%
±
(SR)
15%
(Z) +30 - 80%
Capacitors and transistors are represented by the fol-
CBA Symbols
(Top View) (Bottom View)
+
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)
NPN
Transistor
E C B
(Top View)
NPN Digital
Transistor
E C B
Schematic Diagram Symbols
Digital Transistor
Standard Temperature
range
20°C -25~+85°C
20°C -25~+85°C
20°C -25~+85°C
20°C -10~+70°C
lowing symbols.
Electrolytic Capacitor
(Top View)
PNP
Transistor
E C B
(Top View)
PNP Digital
Transistor
E C B
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
speci-fied.
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.
[ Resistors ]
Item
No indication...........................
Value K............................................k
M..........................................M
No indication............1/4W,1/6W
Power All capacitances other than the
capacitance above are indicated in schematic
diagrams.
[ Capacitors ]
Item
No indication........................... F
Value
P..............................................pF
No indication...........................50V
Dielectric All dielectric strengths other than
strength 50V are indicated in schematic
diagrams.
[ Coils ]
Item
...............................................
Value
m.............................................mH
Indication
Indication
Indication
H
1