Read Sharp LC-20C2E (serv.man5) Service Manual online
29
LC-20C2E
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
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 center 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
(
the center 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
…
µ
F,
P or p … pF
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH "
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.
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.
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
Nonndication
Ceramic capacitor
ML
Mylar capacitor
PF
Polypropylene
film capacitor
TA
Tantalum capacitor
Styrol capacitor
[Item]
31
LC-20C2E
30
LC-20C2E
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
I
J
10
11
12
13
14
15
16
17
18
19
OVERALL SCHEMATIC DIAGRAM
MAIN PWB
VIDEO PWB
INVERTER A
PWB
INVERTER B PWB
SWITCH PWB
S-OUT PWB
TUNER PWB
RUNTK0704CEZZ
LCD SOURCE
LCD GATE
BACK LIGHT
32
LC-20C2E
1
2
3
4
5
6
7
8
9
10
A
B
C
D
E
F
G
H
I
J
SCHEMATIC DIAGRAMS
Ë
Ë
Ë
Ë
Ë
INVERTER A Unit
33
LC-20C2E
1
2
3
4
5
6
7
8
9
10
A
B
C
D
E
F
G
H
I
J
Ë
Ë
Ë
Ë
Ë
INVERTER B Unit
