Specifications are subject to change without
prior notice.
This document has been published to be used for after
sales service only.
The
1
contents
are
subject
to
change
without
notice.
Page 2
20MR10
IMPORTANT SER VICE SAFETY PRECAUTION
Service work should be performed only by qualified service technicians who are thoroughly
familiar with all safety checks and the servicing guidelines which follow:
WARNING
1. For continued safety, no
should be attempted.
2. Disconnect AC power before servicing.
3. Semiconductor heat sinks are
hazards when the chassis is operating.
4. The chassis in this
which are separated by
isolated (hot) ground system is for the B+
regulator
isolated
and the secondary
transformer
To prevent electrical shock use an
transformer between the line cord and power
receptacle, when servicing this chassis.
4A 125V
ground
circuit
.
and
system
CAUTION: FOR CONTINUED
PROTECTION AGAINST A
RISK OF FIRE, REPLACE
ONLY WITH SAME TYPE 4A125V FUSE.
modification
receiver
insulating
the
horizontal
is
circuit
of any circuit
potential
material.
output
of
the
ground
high
has two
for the low B+
systems
The
voltage
circuit.
DC
voltages
voltage
isolation
shock
non-
The
SER VICING OF HIGH VOLTAGE SYSTEM
AND PICTURE TUBE
When servicing the high voltage system,
remove the static charge by connecting a
10k ohm resistor in series with an insulated
wire (such as a test probe) between the picture tube ground and the anode lead. (AC
line cord should be disconnected from AC
outlet.)
1. Picture tube in this receiver employs integral
implosion protection.
2. Replace with tube of the same type number for
continued safety.
3. Do not lift
4. Handle the picture tube only when
shatterproof goggles and after discharging
high
picture
voltage anode
tube
by the neck.
completely
wearing
the
.
X-RADIATION AND HIGH VOLTAGE LIMITS
1. Be sure all service personnel are aware of
procedures and instructions covering X-radiation.
The only potential source of X-ray in current solid
state TV receivers is the
picture tube does not emit
radiation, if the high voltage is as specified in
"High Voltage Check" instructions.
It is only when high voltage is excessive that Xradiation is capable of penetrating the shell of the
picture
The important
voltage
2. It is essential that servicemen have available at all
times an accurate high voltage meter.
The calibration of this meter should be checked
periodically.
3. High
-no higher. Operation at higher voltages may
a failure of the picture tube or high voltage circuitry
and; also,
radiation in exceeding of desirable levels.
When the high voltage regulator is operating properly
4.
there is no possibility of an X-radiation problem.
Every time a color chassis is serviced, the brightness
should be tested while
with a meter to be certain that the high voltage
not
correctly.
5. Do not use a picture tube other than that specified
or make
high voltage circuitry.
6.
When
on a
avoid being
Do
to locate the cause of
tube
including
precaution
below the
voltage should always be
under
exceed
unrecommended
troubles hooting
receiver
not
operate
certain conditions, may produce
the
specified
with
unnecessarily close to the receiver.
the
picture
the lead in the glass material.
maximum
monitoring
value
and taking test
excessive
receiver
excessive
tube. However, the
measurable
is to keep the
level specified.
kept
at the
the high
and
that
it
circuit
modifications
measurements
high
longer
than
voltage.
rated
is
is
the
X-Ray
the
high
value
cause
voltage
does
regulating
to
the
voltage,
necessary
2
Page 3
IMPORTANT SER VICE SAFETY PRECAUTION
(Continued)
20MR10
BEFORE RETURNING THE RECEIVER
&
(Fire Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks.
1. Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacity networks, mechanical
insulators and etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
Plug the AC cord directly into a 120 volt AC outlet,
(Do not use an isolation transformer for this test).
Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series
with all exposed metal cabinet parts and a known
earth ground, such as electrical conduit or electrical
ground connected to earth ground.
Use an AC voltmeter having with 5000 ohm per volt,
or higher, sensitivity to measure the AC voltage drop
across the resistor.
Connect the resistor connection to all
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon and etc.) and measure the AC voltage
drop across the resistor.
AII checks must be repeated with the AC line cord
plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the
purpose of
Any
current
Any measurements not within the limits outlined
above indicate of a potential shock hazard and
corrective
instrument to the customer.
completing
measured
action
must be taken before
1.5k ohm
TEST PR OBE
these check.)
must
10W
0.15 F
not
exceed
exposed
0.5 milliamp.
returning
metal
the
SAFETY NOTICE
Many electrical and mechanical parts in television
recevers have special
These
inspection, nor can protection afforded by them be
necessarily
rated for higher voltage,
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams.
characteristics
increased
having such features are
safety-related
are often not
by using
replacement
wattage and etc.
characteristics.
evident
from visual
components
identified
by ""
!
TO EXPOSED
METAL PARTS
For continued protection, replacement parts must be
identical
substitute
safety characteristics as the factory recommended
replacement
create shock, fire,
to those used in the
replacement
parts shown in this service manual, may
parts
which
X-radiation
CONNECT TO
KNOWN EARTH
GROUND
original
or other hazards.
circuit. The use of
do not have
3
the
same
Page 4
20MR10
LOCATION OF USER'S CONTROL
Front Panel
H
C
–
VOL
POWERVIDEO IN AUDIO
+
MENU
SENSOR AREA FOR
REMOTE CONTROL
POWER
Press On.
Press again Off.
Basic Remote Control Functions
POWER
Press On.
Press again Off.
REMOTE KEYPAD
Accesses any channel from keypad.
FLASHBACK
Returns to previous channel.
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
• In menu mode, changes or selects
the TV adjustments.
MUTE
Press Mutes sound.
Press again Restores sound.
• CLOSED CAPTION appears when
sound is muted.
C
POWER
–
H
V
O
L
+
MENU
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
G1339SB
VIDEO IN AUDIO IN TERMINALS
CHANNEL UP/DOWN
(
) Selects next higher channel.
( ) Selects next lower channel.
• Press both at the same time to
access the MAIN MENU screen.
Infrared Transmitter Window
INPUT
Press Switch to external video input
mode.
Press again Switch to TV mode.
CHANNEL UP/DOWN
( ) Selects next higher channel.
( ) Selects next lower channel.
• Moves the “
” mark of the MENU
screen.
MENU
Press Accesses MAIN MENU.
Press again Exits MAIN MENU.
DISPLA
Y
Press Displays receiving channel for
four seconds.
Press again Removes display.
• Temporarily displays receiving
channel when in Closed Caption
mode.
TV
4
Page 5
INSTALLATION AND SERVICE INSTRUCTIONS
Note:(1) When performing any adjustments to resistor controls and transformers use non-metallic
screwdrivers or TV alignment tools.
(2) Before performing adjustments, the TV set must be on at least 15 minutes.
20MR10
CIRCUIT PROTECTION
The receiver is protected by a 4.0A fuse (F701),
mounted on PWB-A, wired into one side of the AC
line input.
X-RADIATION PROTECT OR CIRCUIT TEST
After service has been performed on the horizontal
deflection system, high voltage system, B+ system,
test the X-Radiation protection circuit to ascertain
proper operation as follows:
1. Apply 120V AC using a variac
accurate input voltage.
2.
Allow
for warm up and adjust all customer
for normal picture and sound.
3. Receive a good local channel.
4. Connect a
that the
5. Apply external 27.2V DC at TP653 by
external DC supply , TV must be shut of f.
6. T o
reset
a
short
sure that
7. If the
stop in step 5, the
the set is
digital
voltmeter
the
protector, unplug
circuit
between
normal
operation
returned
voltmeter
reads 21.4 ±1.5 V.
picture
of the
circuit
to the customer .
to TP653 and make sure
TP651
appears
horizontal
must be
transformer
the AC cord
and
TP652.
on the screen.
oscillator
repaired
controls
using
and
Now
does
before
for
an
make
make
not
HIGH VOL T AGE CHECK
High voltage is not adjustable but must be
to verify that the receiver is operating within
and efficient design limitations as specified checks
should be as follows:
1. Connect an accurate high voltage meter
ground
2. Operate
line voltage, with a strong air signal or a
tuned in test signal.
3. Enter the service mode and select the
adjustment
4. The
beam).
If a correct reading cannot be obtained, check
circuitry for
voltage test, make
and
receiver
voltage
anode of
"S03" and Bus data "01" (Y-mute on).
should
malfunctioning
picture
for at least 15 minutes at 120V
be
approximately
Y-mute of
tube.
26.0kV (at zero
components.
f to the normal mode.
checked
safe
between
AC
properly
service
After the
5
Page 6
20MR10
For adjustments of this model, the bus data is converted to various analog signals by the D/A
converter
Note: There are still a few analog adjustments in this series such as focus and master screen voltage.
the steps below whenever the service adjusment is required.
To enter the service mode and exit service mode.
While
pressing
Now, the TV set is
To
exit
the service mode,
the Vol-up and Ch-up
switched
on and enters the service mode.
turn
the
television
buttons
at the
off by
sametime,
pressing
the
plug
the AC cord into a wall socket.
power
button.
1. Service mode.
Before
function
putting
in the
unit
into
video
the service mode,
adjustment
menu
check
to ensure
that
customer
customer
adjustments
control
are in
are in the
their
proper
normal
mode.
(reset) position.
Use the reset
2. Service number selection.
In the service mode, you will see the
3
SIGNAL, FIX VALUE as show in Figure A.
4
Window : DEF
D01
D03
D05
RETURN
2
D02
D04
D06
window
screen as window . There are 3 adjustment categories DEF,
DEF
SIGNAL
1
Window : SIGNAL
3
S01
S13
RETURN
S02
S12
circuit.
Follow
2
RETURN
Window : ADJUSTMENT CATEGORIES
RETURN
Window : FIX VALUE
RETURNNEXT
4
F01F02
F13F14
Figure A: ADJUSTMENT CATEGORIES
1
SERVICE MODE
DEF
SIGNAL
FIX VALUE
EEPR OM
NEXT
PREVIOUS
RETURN
FIX VALUE
F15F16
F25F26
RETURN PREVIOUS
Press CH UP/DOWN button for selection and enter by VOL UP or VOL DOWN.
Press CH UP/DOWN
to adjust the data
button
number
to
select
the
adjustment
for each categories.
item and VOL UP/DOWN
(OSD disturbance can be erased by R/C display key)
(Note: EEPROM – factory used only)
6
Page 7
Below are the adjustments ranges and initial values for FIX VALUE category.
Below are the ranges and initial values for each adjustment and in each categories.
DEF
SER VICE
POSITION
D01H-PHASE00-1F0C
D02V-SIZE00-7F40
D03V-POSITION00-3F20Must be "20"
D04CC-POSITION00-FF1A
D05V-LINEARITY00-1F10Must be "18"
D06V-S-CORRECTION00-1F10Must be "0C"
Note: Refer to the SERVICE ADJUSTMENT for each corresponding values.
DATA
Table - C
INITIAL VALUE
ADJUSTMENT CONTENTS
"01":Y-MUTE, "02":V-STOP&Y-MUTE
"03":Activate color killer
7
Page 8
20MR10
Holding
write
down
both
the V
ol-up/Ch-down
the above initial values into IC2102 (IC2101).
PART REPLACED
IC2001
IC201
IC2102
(IC2101)
CRT
NECESSAR Y
ADJUSTMENT
X
X
X
If using
IC2101
If using
IC2102
buttons
on the TV set at
UNNECESSAR Y
X
service
Data is stored in IC2102 (IC2101).
The adjustment is needed to
of parts including IC201.
Holding down both the Vol-up/Ch-down
set in the service mode for more than 2 seconds will
automatically write the above initial values into IC2102
(IC2101).
Adjust
items related to
Table - D
R2101R2102R2103R2104
––
––
mode
for
more
than 2 seconds
NOTES
compensate
picture
tube only.
will
automatically
for characteristics
buttons
on the TV
Table - E
8
Page 9
SER VICE ADJUSTMENT
20MR10
RF AGC Adjustment
1. Receive a
2. Enter the service mode signal category and
the service adjustment "S01".
3. Set the data value to
appears.
4. Select another channel to
beat appears.
Note: You have to exit the service mode first to
select another channel.
good
local channel.
point
where
confirm
select
no noise or
that no noise
Video Level (TV Det V ideo Level)
Adjustment
1. Receive a good local channel.
2. Enter the service mode signal category and
the service adjustment "S02".
3. Set the data value to "02" first, then adjust the
in ranges
02 ±2
step to
obtain a normal
contrast
select
level.
Screen Adjustment
1.
Connect
ground
2. Receive a good local channel.
3. Enter the service mode Signal
service
service adjustment "S12" and set the data value
"00" to set the color level to the minimum
(record the original data first). Y
if you selected a B/W picture or
Set also the "S05/S06/S07" data to minimum level.
4. Select the service adjustment "S03" and set the
value to "01" to
5. Select the service adjustment "S13" and adjust
data value to obtain 2.35 volts as shown in Figure B.
6. Adjust the master screen control until the
darkens to the point where raster is barely seen.
7.
Adjust
and "S07" blue to obtain a good grey scale
normal
8. Select the service a
to "00".
data to obtain normal color level.
9. Remove
to
to
oscilloscope
of the CR T unit.
adjustment
the
service
white at low
Select
probe
obtain
normal
probe
between
category
"S04" to step 30. Then select
ou
may skip this
monoscope
turn
off the
luminance
adjustment
brightness
adjustment
the service
and reset the
brightness
"S05" red, "S06"
level.
"S03" and reset
adjustment
master
range.
TP855
and set
pattern.
signal (Y
"S12" and
screen
-mute).
level.
step,
raster
green
reset
control
beat
or
data
and
the
the
to
data
the
with
data
White Balance Adjustment
1. Receive a good local channel.
2.
Select
the
service
value to "00" to set the color level to the
You may skip this step, if you selected a B/W
or monoscope.
3. Alternately adjust the service adjustment data
"S08" and "S09" until a
white is obtained.
4. Select the service
to obtain normal color level.
adjustment
good
adjustment
"S12" and set the
minimun.
picture
grey scale
"S12" and reset data
with
normal
data
of
Sub-Picture Adjustment
1. Receive a good local channel.
2. Make sure the customer picture control is set
maximum.
3. Enter the service mode and select the service
adjustment "S10".
4. Adjust the data value to achieve normal
range.
to
contrast
Sub-Tint Adjustment
1. Receive a good local channel.
2.
Set
the
customer
3. Enter the service mode and select the service
adjustment
4.
Adjust
"S11" data value to
"S11".
tint
control
to the
obtain
center of it’s range.
normal
fresh tones.
Sub-Color Adjustment
1. Receive a good local channel.
2. Make sure the
position.
3. Enter the service mode and select the service
adjustment
4.
Adjust
"S12" data value to
customer
"S12".
color
obtain
control
normal
is
set
to
center
color
level.
Sub-Brightness Adjustment
1. Receive a good local channel.
2. Make sure the
center position.
3. Enter the service mode and select the service
adjustment
4.
Adjust
"S13" data value to
level.
customer
"S13".
brightness
obtain
control
normal
is set to
brightness
2.35 Vdc
GND
Figure B: WAVEFORM FOR SCREEN ADJUSTMENT
9
Page 10
20MR10
Vertical-Size, V-Linearity and
V-S Correction Adjustments
1. Receive a good local channel.
2. Enter the service
adjustment "D02" for Vertical Size, "D05" for VLinearity and "D06" for V-S
3. Set in order "D05" for V-Linearity, "D06" for V-S
Correction
4. Then adjust "D02" data until it become a
vertical size.
mode
DEF
category
Correction
and set the data to get the best
and
Adjustment.
select
linearity
proper
the
Horizontal Position Adjustment
.
1. Receive a
2. Enter the service
adjustment
3. Adjust "D01" data value to
good
local channel.
"D01".
mode
DEF
category
center
and
select
the picture.
the
Vertical-Phase Adjustment
1. Receive a
2. Enter the
adjustment
3.
Adjust
vertical position.
Note: The step range is 20 (032) ±10 steps.
good
local channel.
service
"D03" bus data to get the most
"D03".
mode
DEF
category
and
select
the
acceptable
Caption Position Adjustment (Horizontal)
1. Receive a
2. Enter the service
adjustment
3. A black text box will appear on the screen. (see
Figure C. below)
4. Adjust "D04" data value to balance the text
position
good
local channel.
mode
DEF
"D04".
in the center (A=B).
category
and
select
the
box
AB
Figure C.
10
Page 11
CHASSIS LAYOUT
H
G
F
20MR10
E
D
C
B
A
654321
11
Page 12
20MR10
BLOCK DIAGRAM
H
G
F
E
D
C
B
A
654321
12
Page 13
DESCRIPTION OF SCHEMATIC DIAGRAM
20MR10
NOTES:
1. The unit of resistance "ohm" is omitted.
(K=k =1000 , M=M )
2. All resistors are 1/10 watt, unless otherwise noted.
3. All capacitors are µF, unless otherwise noted.
(P=pF=µµF)
4. (G) indicates ±2% tolerance may be used.
5. indicates line isolated ground.
VOLTAGE MEASUREMENT CONDITIONS:
1. All DC voltages are measured with DVM connected
between points indicated and chassis ground, line
voltage set at 120V AC and all controls set for normal
picture unless otherwise indicated.
2. All voltages measured with 1000µ V B & W or Color
signal.
WAVEFORMS
1.0
1.0
0.9
WAVEFORM MEASUREMENT CONDITIONS:
1. Photographs taken on a standard gated color bar
signal, the tint setting adjusted for proper color. The
wave shapes at the red, green and blue cathodes of
the picture tube depend on the tint, color level and
picture control.
2.
indicates waveform check points (See chart,
waveforms are measured from point indicated to
chassis ground.)
!
AND SHADED ( ) COMPONENTS
= SAFETY RELATED PARTS.
MARK= X-RAY RELATED PARTS.
This circuit diagram is a standard one, printed
circuits may be subject to change for product
improvement without prior notice.
Replacement parts which have these special safety characteristics
identified in this manual; electrical components having such features
are identified by and shaded areas in the Replacement Parts Lists
and Schematic Diagrams. The use of a substitute replacement part
which dose no have the same safety characteristic as the factory
recommended replacement parts shown in this service manual may
create shock, fire or other hazards.
"HOW TO ORDER REPLACEMENT PARTS"
To have your order filled promptly and correctly, please furnish the
following informations.
1. MODEL NUMBER2. REF. NO.
3. PART NO.4. DESCRIPTION
in USA: Contact your nearest SHARP Parts Distributor to order.
Ref. No.Part No.DescriptionCode
!
For location of SHARP Parts Distributor, Please call TollFree; 1-800-BE-SHARP
RJ2VRS-CY1JF000JJ 01/16W M-Ox.AA
RJ7VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ8VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ9VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ10 VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ12 VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ18 VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ19 VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ20 VRS-CY1JF000JJ 01/16W M-Ox.A A
RJ21 VRS-CY1JF000JJ 01/16W M-Ox.A A
1CCABA0006WEH2 X Front Cabinet Ass’yAY
1-1
1-2GCOVA0003GJSA X Cover for R/CAG
1-3HBDGB1001GJSB X Badge, "SHARP"AF
1-4JBTN-0003GJSDX Button(Power, Vol-up/down, AH
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.
D SEM P SEMEX TQ1071-S
Jun. 2001 Printed in Japan
MI. KG
SHARP ELECTRONICA MEXICO S.A. DE C.V.
Blvd. SHARP No. 3510 Parque Industrial
Rosarito, Playas de Rosarito, B. C. 22710
30
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