SCHEMATIC, CIRCUIT BOARD AND BLOCK DIAGRAMS
1 SCHEMATIC DIAGRAMS / CBA?S AND TEST POINTS
Standard NotesNotes:
WARNING1. Do not use the part number shown on these draw-
ings for ordering. The correct part number is shown
Many electrical and mechanical parts in this chassisin the parts list, and may be slightly different or
have special characteristics. These characteristicsamended since these drawings were prepared.
often pass unnoticed and the protection afforded by
2. All resistance values are indicated in ohms
them cannot necessarily be obtained by using replace-
36
(K=10, M=10).
ment components rated for higher voltage, wattage,
etc. Replacement parts that have these special safety3. Resistor wattages are 1/4W or 1/6W unless other-
characteristics are identified in this manual and itswise specified.
supplements; electrical components having such fea-
4. All capacitance values are indicated in ?F
tures are identified by the mark " ! " in the schematic-6
(P=10 ?F).
diagram and the parts list. Before replacing any of
these components, read the parts list in this manual5. All voltages are DC voltages unless otherwise
carefully. The use of substitute replacement parts thatspecified.
do not have the same safety characteristics as speci-6. Electrical parts such as capacitors, connectors,
fied in the parts list may create shock, fire, or other
diodes, IC?s, transistors, resistors, switches, and
hazards.fuses are identified by four digits. The first two dig-
its are not shown for each component. In each
Capacitor Temperature Markings
block of the diagram, there is a note such as shown
below to indicate these abbreviated two digits.
Capacity Standard Temperature
Mark
change ratetemperaturerange
(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
Capacitors and transistors are represented by the following symbols.
CBA Symbols Schematic Diagram Symbols
(Top View) (Bottom View)Digital Transistor
+
Electrolytic Capacitor
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)(Top View)
NPN TransistorPNP Transistor
E C BE C B
(Top View)(Top View)
PNP Digital
NPN Digital Transistor
Transistor
E C BE C B
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ACEC
HITACHI
