Sharp LC-20B2H, Service Manual

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20
LC-20B2H
LC-20B2M
DESCRIPTION OF SCHEMATIC DIAGRAM
1. When the exclusive-use AC adapter is used, the
colour bar signal of colour bar generator for service
is input to get the normal screen. When the audio is
minimized, the voltage value is measured with the
20 k
Ω
/V tester.
2. When the exclusive-use AC adapter is used, the
colour density, lightness and colour hue are set to
the centre position, and the signal of colour bar
generator for service is observed to get waveform.
The wave form test point is indicated with the mark
(
) in the wiring diagram.
3. Indication of resistors and capacitors
[Resistors]
Unit : Nonindication …
Ω
, K…k
Ω
,
M … M
Ω
Error : Nonindication … ±5%
F … ±1%
D … ±0.5%
[Capacitor]
Unit : Nonindication or µ … µF,
P or p … pF
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH "
å
"( ) ARE
INPORTANT FOR MAINTAINING THE SAFETY OF
THE SET.
BE SURE TO REPLACE THESE PARTS WITH
SPECIFIED ONES FORMAINTAINING THE SAFETY
AND PERFORMANCE OF THE SET.
CAUTION:
This circuit diagram is original one, therefore there
may be a slight difference from yours.
Resistors
Nonindication Carbon-film resistor
C Solid resistor
S Metal-oxide-film resistor
N Metal-film resistor
W Cement resistor
T Special resistor
Capacitors
Nonindication Ceramic capacitor
ML Mylar capacitor
PF Polypropylene
film capacitor
TA Tantalum capacitor
ST Styrol capacitor
[Item]