10.2. Important safety notice
- Components identified by a mark have special characteristics
important for safety.
- When replacing any of these components, use only manufacture’s
specified parts.
10.3. Symbolic marks
The symbolic marks for resistors and capacitors which used in this circuits are classified as
following Table-1 and Table-2 .
10.3.1. Resistors
- Resistors without symbolic mark are FIXED CARBON FILM
RESISTORS (ERD-type).
- All resistors are 1/4 WATT, ±5 % TOLERANCE unless otherwise
designated in schematic diagrams.
Table-1
SYMBOL SPECIFICATION
Fixed Carbon Film Resistors
“FLAME-PROOF” (ERD—F—type)
Fixed Wire Wound Resistors
“FLAME-PROOF” (ERF—type)
Fixed Metal Oxide Film Resistors
“FLAME-PROOF” (ERG—type)
Fixed Metal Film Resistors
“FLAME-PROOF” (ERX—type)
Fixed Metal Film Resistors (Precision and High Stability)
(ERO—type)
Fuse Type Fixed Metal Oxide Film Resistors
“FLAME-PROOF” (ERQ—type)
Fuse Type Fixed Carbon Film Resistors
“FLAME-PROOF” (ERD2FC—type)
10.3.2. Capacitors
- Capacitors without symbolic mark are POLYESTER CAPACITORS.
(ECQM-type, ECQG-type, ±10% Tolerance)
- Polarized capacitors without symbolic mark are Aluminum
Electrolytic Capacitors. (ECEA-type, ±20% Tolerance)
Table-2
24
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