Toshiba HD-A2KC Servicehandleiding - Pagina 12
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1. CIRCUIT SYMBOLS AND SUPPLEMENTARY EXPLANATION
1-1. Precautions for Part Replacement
• In the schematic diagram, parts marked
F801) are critical part to meet the safety regulations, so
always use the parts bearing specified part codes (SN)
when replacing them.
1-2. Solid Resistor Indication
Unit
Tolerance
Rated Wattage
Type
1-3. Capacitance Indication
Symbol
Unit
Rated voltage
Tolerance
Temperature characteristic
(Ceramic capacitor)
Static electricity capacity
(Ceramic capacitor)
SECTION 3
SERVICING DIAGRAMS
(ex.
None
........... Ω
K
........... kΩ
M
........... MΩ
None
........... ±5%
B
........... ±0.1%
C
........... ±0.25%
D
........... ±0.5%
F
........... ±1%
G
........... ±2%
K
........... ±10%
M
........... ±20%
(1) Chip Parts
None ......... 1/16W
(2) Other Parts
None ......... 1/6W
Other than above, described in the Circuit Diagram.
None
........... Carbon film
S
........... Solid
R
........... Oxide metal film
M
........... Metal film
W
........... Cement
FR
........... Fusible
+
........... Electrolytic, Special electrolytic
........... Non polarity electrolytic
NP
........... Ceramic, plastic
........... Film
M
........... Trimmer
None
........... F
µ
........... µF
p
........... pF
None
........... 50V
For other than 50V and electrolytic capacitors,
described in the Circuit Diagram.
(1) Ceramic, plastic, and film capacitors of which
capacitance are more than 10 pF.
None
........... ±5% or more
B
........... ±0.1%
C
........... ±0.25%
D
........... ±0.5%
F
........... ±1%
G
........... ±2%
(2) Ceramic, plastic, and film capacitors of which
capacitance are 10 pF or less.
None
........... more than ±5 pF
B
........... ±0.1 pF
C
........... ±0.25 pF
(3) Electrolytic, Trimmer
Tolerance is not described.
None
........... SL
For others, temperature characteristics are
described. (For capacitors of 0.01 µF and
no indications are described as F.)
Sometimes described with abbreviated letters as
shown in Eg. 3.
• Using the parts other than those specified shall violate
the regulations, and may cause troubles such as
operation failures, fire etc.
Eg. 1
Rated Wattage
Eg. 2
Temperature
response
Eg. 3
10x10
Temperature characteristic
(or Temperature characteristic+
Static electricity capacity tolerance)
100k
Type
Tolerance
Fig. 3-1-1
100µ
Rated
Tolerance
voltage
Fig. 3-1-2
104
4
pF (0.1µF)
Fig. 3-1-3