Toshiba 15DL72, Service Manual

Page: 17 / 57

2-1
1. CIRCUIT SYMBOLS AND SUPPLEMENTARY EXPLANATION
1-1. Solid Resistor Indication
Symbol ..... Carbon film
..... Oxide metal film
Unit None .....
W
k ..... k
W
M ..... M
W
Tolerance None ..... ±5%
F ..... ±1%
K ..... ±10%
Rated Wattage (1) Chip Parts
None .. 1/16W
(2) Other Parts
None .. 1/6W
Other than above, described in the Circuit
Diagram.
Table 2-1-1
Fig. 2-1-1
SECTION 2
SERVICING DIAGRAMS
Unit None ..... H
m
.....
m
H
m ..... mH
Tolerance None ..... ±5%
K ..... ±10%
M ..... ±20%
Type PL ..... Peaking
Others display model
Table 2-1-2
Fig. 2-1-2
1-2. Inductor Indication
Symbol ..... Electrolytic, Special electrolytic
..... Ceramic, Film
Unit None ..... F
m
.....
m
F
n ..... nF
p ..... pF
Rated voltage None ..... 50V
For other than 50V and electrolytic
capacitors, described in the Circuit
Diagram.
Tolerance (1) Ceramic, plastic, and film capacitors
None .. ±5% or more
(2) Electrolytic, Trimmer
Tolerance is not described.
Temperature None ..... SL
characteristic For others, temperature characteristics are
(Ceramic capacitor) described.
1-3. Capacitance Indication
Table 2-1-3
Fig. 2-1-3
1-4. Waveform and Voltage Measurement
• The various wave forms of the color circuit and
voltage measurement values are for when the service
color bar signal is received with ample reception and a
proper image is received.
• Other various wave forms of circuits and voltage
measurement values are for when general broadcasts
are normally received and will differ slightly depend-
ing on the broadcast contents. Use it as a standard
during servicing.
• All voltage values except the waveforms are expressed
in DC and measured by a digital voltmeter.
1-5. Precautions for Part Replacement
• In the schematic diagram, parts marked (ex.
F800) are critical part to meet the safety regulations,
so always use the parts bearing specified part codes
(SN) when replacing them.
• Using the parts other than those specified shall violate
the regulations, and may cause troubles such as
operation failures, fire etc.
100k
Rated Wattage
Tolerance
Tolerance
10 m
Type
100p
Tolerance Temperature
characteristic