Emerson EWL20S5, Service Manual

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8-1 LC4N_SC
SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS
Standard Notes
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 replacement
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 features 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 specified in the parts list may create shock, fire, or other hazards.
Notes:
1. Do not use the part number shown on these drawings 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 resistance values are indicated in ohms (K = 10
3
, M = 10
6
).
3. Resistor wattages are 1/4W or 1/6W unless otherwise specified.
4. All capacitance values are indicated in
µ
F (P = 10
-6 µ
F).
5. All voltages are DC voltages unless otherwise specified.
Note of Capacitors:
ML --- Mylar Cap. PP --- Metallized Film Cap. SC --- Semiconductor Cap. L --- Low Leakage type
Temperature Characteristics of Capacitors are noted with the following:
B --- ±10% CH --- 0±60 ppm/°C CSL --- +350~-1000 ppm/°C
Tolerance of Capacitors are noted with the following:
Z --- +80~-20%
Note of Resistors:
CEM --- Cement Res. MTL --- Metal Res. F --- Fuse Res.
Capacitors and transistors are represented by the following symbols.
(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