Read Sharp LC-30HV4E (serv.man14) Service Manual online
LC-30HV4E
84
DESCRIPTION OF SCHEMATIC DIAGRAM
VOLTAGE MEASUREMENT CONDITION:
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
get the normal screen. When the audio is minimized,
the voltage value is measured with the 20 k
Ω
/V tester.
WAVEFORM MEASUREMENT CONDITION:
1. 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.
position, and the signal of colour bar generator for
service is observed to get waveform.
2. indicates waveform check points (See chart,
waveforms are measured from point indicated to
chassis ground.)
chassis ground.)
INDICATION OF RESISTOR & CAPACITOR:
RESISTOR
1. The unit of resistance “
1. The unit of resistance “
Ω
” is omitted.
(K=k
Ω
=1000
Ω
, M=M
Ω
).
2. All resistors are ± 5%, unless otherwise noted.
(J= ± 5%, F= ± 1%, D= ± 0.5%)
3. All resistors are Carbon type, unless otherwise noted.
C
: Solid
W
: Cement
S
: Oxide Film
T
: Special
N
: Metal Coating
CAPACITOR
1. All capacitors are mF, unless otherwise noted.
1. All capacitors are mF, unless otherwise noted.
(P=pF=mmF).
2. All capacitors are Ceramic type, unless otherwise
noted.
(ML) : Mylar
(ML) : Mylar
(TA) : Tantalum
(PF) : Polypro Film
(ST) : Styrol
CAUTION:
This circuit diagram is original one, therefore there may be a
slight difference from yours.
slight difference from yours.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH “
å
”
( )ARE
IMPORTANT FOR MAINTAINING THE SAFETY OF
THE SET. BE SURE TO REPLACE THESE PARTS
WITH SPECIFIED ONES FOR MAINTAINING THE
SAFETY AND PERFORMANCE OF THE SET.
THE SET. BE SURE TO REPLACE THESE PARTS
WITH SPECIFIED ONES FOR MAINTAINING THE
SAFETY AND PERFORMANCE OF THE SET.
LC-30HV4E
85
WAVEFORMS
1
IC1301 63-pin
V: 200mV/div H: 10µsec/div
2
IC1301 56-pin
V: 500mV/div H: 10µsec/div
3
IC405 1.2-pin
V: 500mV/div H: 10µsec/div
4
IC801 1-pin
V: 200mV/div H: 10µsec/div
5
IC803 TP801
V: 200mV/div H: 20µsec/div
6
IC803 TP802
V: 200mV/div H: 20µsec/div
7
IC803 TP803
V: 200mV/div H: 20µsec/div
8
IC803 31-pin
V: 1V/div H: 20µsec/div
9
IC810 13-pin
V: 500mV/div H: 20µsec/div
0
IC810 11-pin
V: 500mV/div H: 20µsec/div
q
IC810 10-pin
V: 500mV/div H: 20µsec/div
w
IC2201 95-pin
V: 1V/div H: 5µsec/div
e
r
IC2201 96-pin
V: 1V/div H: 5msec/div
IC2201 97-pin
V: 1V/div H: 5µsec/div
