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SHARP 66DW -18H
General Information
Also Covers
76DW-18H
CW-100 Chassis
Recommended Safety Parts
Item Part No. Description
VB66ESF0244*N C.R.T. 28” 16:9 66DW18H CT
VB76ESF3144*N C.R.T. 32 16:9 76DW18H **
RCILGO41 7BMZZ Degaussing Coil 28” 16:9 66DW18H AX
RCILGO41 8BMZZ Degaussing Coil 32” 16:9 76DW18H
IC 0701 RH-FXO1O6BMZZ M0C8106SR2V AD
PR 0701 RMPTPOO28CEZZ P.T.C. AG
L 0701 RCILF0154CEZZ Coil AQ
L 0702 RCILP0110CEZZ 3.3uH AD
L 0703 RCILP0110CEZZ 3.3uH AD
T 0601 RTRNF2046BMZZ F.B.T. 66DW18H BK
T 0601 RTRNF2045BMZZ F.B.T. 76DW18H BK
T 0602 RTRNZ0553BMZZ Focus Transformer 76DW18H AU
T 0701 RTRNZ0552BMZZ Chopper AX
C 0701 RC-KZ0029CEZZ 0.01250V Ceramic AC
C 0702 RC-FZO16OBMZZ 0.47275V Mylar AF
C 0717 RC-KZO156CEZZ 13300p 4KV Ceramic AD
R 0721 VRC-UA2HG825K 8.2M 1/2W Solid AA
R 0722 VRC-UA2HG825K 8.2M 1/2W Solid AA
F 0601 QFS-J2521CEZZ Fuse 2.5A 125V AD
F 0602 QFS-J2521CEZZ Fuse 25A 125V AD
F 0702 QFS-J2521CEZZ Fuse 2.5A 125V AD
F 0703 QFS-J2521CEZZ Fuse 2.5A 125V AD
SC 1801 QSOCV0103BMZZ C.R.T. Socket 66DW18H AG
SC 1801 QSOCV0936CEZZ C.R.T. Socket 76DW18H AM
IC 6703 RH-FX0106BMZZ M0C8106SR2V AD
IC 6704 RH-FX0106BMZZ M0C8106SR2V AD
L 6701 RCILF0108BMZZ Main Filter AL
F 6701 QFS-C3226CEZZ Fuse 3.15A 250V AE
S 6701 QSW-P0600BMZZ Power Switch AL
IC 7001 RH-FX0103BMZZ M0C8105SR2V AD
T 70001 RTRNZ0548BMZZ Transformer AU
SERVICING OF HIGH VOLTAGE SYSTEM
AND PICTURE TUBE
When servicing the high voltage system, remove
static charge from it by connecting a 10 k ohm
resistor in series with an insulated wire (such as
test probe) between picture tube ground tag and
high voltage lead. (AC line cord should be
disconnected from AC outlet.)
1. Picture tube this receiver employs integral
implosion protection.
2. Replace with tube of the same type number
for continued safety.
3. Do not lift picture tube by the neck.
4. Handle the picture tube only when wearing
shatterproof goggles and after discharging the
high voltage completely.
X-RAY
This receiver is designed so that any X-Ray
radiation is kept to an absolute minimun. Since
certain malfunctions ar servicing may produce
potentially hazardous radiation with prolonged
exposure at close range, the following precautions should be observed:
1. When repairing the circuit, be sure not to
increase the high voltage to more than 33.0
kV, (at beam 1800 uA) for the set.
2. To keep the set in a normal operation, be sure
to make it function on 29.5kV± 1.5kV (at
beam 1800 uA) in the case of the set. The set
has been factory adjusted to the above
mentioned high voltage. If there is a possibility
that high voltage fluctuates as a result of the
repairs, never forget to check for such high
voltage after the work.
3. Do not substitute a picture tube with unauthorized types or brands which may cause
excess
RCILGO419BMZZ Rotation Coil 16:9
CACCB5007BMV0 AC Cord AU
Service Notes
X-ray radiation.
BEFORE RETURNING THE RECEIVER
Before returning the receiver to the user,
perform the following safety checks.
1. Inspect all lead insulation 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 nonmetallic control knobs, insulating fishpapers,
cabinet backs, adjustment and compartment
covers or shields, insolation resistor-capacity
networks, mechanical insulators etc.
All the adjustments required for this chasis will
be done in Service Mode, except G2, IF PLL
(AFT) and RFAGC.
• G2 ADJUSTMENT
1. Receive cross hatch pattern signal.
2. Set contrast to 80/100 and brightness to 40/
100.
3. Connect the oscilloscope to the red cathode
and adjust G2 to read 150V on the sensor
pulse as in the following figure:
Service Adjustments
NOTE:
Osciloscope should be adjustated for vertical
TV field trigger and synchronized with video
signal.
• IF PLL ADJUSTMENT (AFT)
1. Disconnect antenna signal
2. Connect the output of SSG (Standard Signal
Generator) to the tuner IF output terminal.
• SSG output: 38.9 MHz (CW) ± 5 kHz
• SSG output level: approx. 90 dBuV
• Probe: Direct
3. Connect the digital voltmeter to pin 11 of IC
201.
4. Adjust the AFT coil (L 205) to obtain 4.5VDc
on voltmeter.
• RF AGC ADJUSTMENT
1. Receive “COLOUR BAR” signal (UHF).
• signal strength: 57 dBuV
2. Connect DC voltmeter to Test Point J91 (RF
AGC).
3. Set AGC control (R224) to maximum position
(memory).
4. Adjust R224 to obtain voltage of 0.1V below
maximum voltage (step 3).
• SERVICE MODE FUNCTION
This mode function is provided to assist with the
settings of those adjustment that may vary from
one Picture Tube to another, or between
models. In order to use the Service Mode
1. Connect Test Pattern signal to antenna
terminal. Set to full mode screen by wide
button
2. Press main switch to “OFF”.
3. Press volume-down and channel-up buttons
and main switch to “ON” simultaneously.
4. Service mode is now entered.
The required adjustments can then be made
from the Remote Control Unit.
The only buttons required are the following:
Up/Down-channel for movement in adjustment
options menu; Up/Down-volume are used to
carry out an adjustment in said menu; ON/OFF
is used to memorize a new adjustment.
Adjustment menu is as follows:
- SERVICE SOFTWARE
- HORIZONTAL SHIFT
- EAST WEST WIDTH
- PIN PHASE
- PIN AMP
- UPPER CORNER CORRECTION
- LOWER CORNER CORRECTION
- VERTICAL LINEARITY
- VERTICAL ANGLE
- VERTICAL BOW
- VERTICAL AMPLITUDE
- S CORRECTION
- VERTICAL SHIFT
- RED GAIN
- GREEN GAIN
- BLUE GAIN
- RED CUT OFF
- GREEN CUT OFF
- BLUE CUT OFF
- ALTER NVM PAG
- ALTER NVM POS
- ALTER NVM VAL
- TELETEXT MIX MODE CONTRAST
- TELETEXT CONTRAST
- OSD CONTRAST
- DVCO ADJUSTMENT (ONLY PAL)
- DVCO ADJUSTMENT (ONLY NTSC)
- LUMA CHROMA DELAY
- OPC VALUE
- AUTOINST ALLATION ON/OFF
To exit service mode, press main switch to off.
Adjustment Note:
The procedure for making adjustments to
horizontal coyrections are as follows:
- Adjust HORIZONTAL SHIFT
- Adjust E-W WIDTH
- Adjust PIN PHASE
- Adjust PIN AMPLITUDE
- Adjust UPPER CORNER CORRECTION
- Adjust LOWER CORNER CORRECTION
The procedure for making adjustments to
vertical corrections is as follows:
- Adjust VERTICAL AMPLITUDE
- Adjust S-CORRECTION
- Adjust VERTICAL SHIFT
- Adjust VERTICAL LINEARITY
- Adjust VERTICAL ANGLE
- Adjust VERTICAL BOW
1- HORIZONTAL SHIFT
a) Receive Philips pattern signal.
b) When volume-up button is pressed, picture
moves to the left.
c) When volume-down button in pressed, picture
moves to the right.
d) Adjust the horizontal location to obtain picture
centering (fig. 1).
2- E-W WIDTH
a) Receive Philips pattern signal.
b) When volume-up button is pressed, horizontal
scanning increases.
c) When volume-down button is pressed,
horizontal scanning decreases.
d) Adjust the horizontal amplitude to obtain 8%
overscan (fig. 2).
3- PIN PHASE
a) Receive Philips pattern signal.
b) When volume-up button is pressed, slide
pincushion changes.
c) When volume-down button is pressed, slide
pincushion changes.
d) Adjust the PIN PHASE to obtain condition as
in (fig. 3).
4- PIN AMPLITUDE
a) Receive Philips pattern signal.
b) When volume-up button is pressed, slide
pincushion changes from pincushion to barrel
shape.
c) When volume-down button is pressed, slide
pincushion changes from barrel to pincushion
shape.
d) Adjust the PIN AMPLITUDE to obtain
condition as in (fig. 4).
Fig. 1
Fig. 2
Fig. 3
Fig. 4
5- UPPER CORNER CORRECTION
a) Receive Philips pattern signal.
b) When volume-up button is pressed, slide
pincushion changes from pincushion to barrel
shape.
c) When volume-down is pressed, slide
pincushion changes from barrel to pincushion
shape.
d) Adjust the UPPER CORNER CORRECTION
to obtain condition as in (fig. 5).
6- LOWER CORNER CORRECTION
a) Receive Philips pattern signal.
b) When volume-up button is pressed, slide
pincushion changes from pincushion to barrel
shape.
c) When volume-down button is pressed, slide
pincushion changes from barrel to pincushion
shape.
d) Adjust the LOWER CORNER CORRECTION
to obtain condition as in (fig. 6).
7- VERTICAL LINEARITY
a) Receive Philips pattern signal.
b) When volume-up button is pressed, upper
picture scanning decreases and lower picture
scanning increase.
c) When volume-down button is pressed, upper
picture scanning increases and lower picture
scanning decreases.
d) Adjust the vertical symmetry to obtain
symmetrical scanning between upper and
lower picture (fig. 7).
8- VERTICAL ANGLE
a) Receive Philips pattern signal.
b) When volume-up button is pressed, vertical
angle changes to the right.
c) When volume-down button is pressed,
vertical angle changes to the left.
d) Adjust the VERTICAL ANGLE to obtain
condition as in (fig. 8).
9- VERTICAL BOW
a) Receive Philips pattern signal.
b) When volume-up button is pressed, vertical
bow changes to the right.
c) When volume-down button is pressed,
vertical bow changes to the left.
d) Adjust the VERTICAL BOW to obtain
condition as in (fig. 9).
10- VERTICAL AMPLITUDE
a) Receive Philips pattern signal.
b) When volume-up button is pressed, vertical
size of picture increases.
c) When volume-down button is pressed,
vertical size of picture decreases.
d) Adjust the vertical size to obtain overscan
(fig. 10).
11- S-CORRECTION
a) Receive Philips pattern signal.
b) When volume-up button is pressed, upper
and lower scanning decreases, and center
scanning increases.
c) When volume-down button is pressed, upper
and lower scanning increases, and center
scanning decreases.
d) Adjust the S-correction to obtain a balance
between upper, lower and center (fig. 11).
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
12- VERTICAL SHIFT
a) Receive Philips pattern signal.
b) When volume-up button is pressed, picture
moves up.
c) When volume-down button is pressed, picture
moves down.
d) Adjust the horizontal location to obtain picture
centering (fig. 12)
Fig. 12
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SHARP 66DW -18H
Adjustments Cont’d
1. RED CUT OFF / GREEN CUT OFF / BLUE
CUT OFF
1.1 Adjust G2.
1.2 Tune a white card.
1.3 Adjust colour to minimum.
1.4 Position colourimeter in the center of screen.
1.5 Adjust brightness and contrast to obtain a
luminance of 20 NITS.
1.6 Operate in Service Mode and select location
RED CUT OFF/ GREEN CUT OFF/ BLUE CUT
OFF, to obtain colour coordinates:
X = 0.297 ± 0.015
Y = 0.310±0.015
To increase press volume-up button and to
decrease press volume-down button
RED CUT OFF alter “X’ coordinate
GREEN CUT OFF alter “Y” coordinate
BLUE CUT OFF alter “X” and “Y coordinate
1.7 The changes introduced can be memorized
by pressing button (5 on TV set.
2. RED GAIN / GREEN GAIN / BLUE GAIN
2.1 Using brightness and contrast buttons,
select a luminance of 110 NITS.
2.2 Operate again in Service Mode and select
location RED GAIN / GREEN GAIN BLUE GAIN,
to obtain colour coordinates:
Shows reading of detected illuminated value by
O.P.C. (Optical Picture Control) to check
function.
AUTO INSTALLATION OFF/ON
When ON is selected, the TV will perform the
autoinstallation secuence as soon as service
mode is removed.
PROTECTIONS CANCEL
a) Connect Test Pattern signal to antenna
terminal.
b) Press main switch to OFF.
c) Press volume-down and channel-up buttons
and main switch to ON simultaneously.
d) “Service software Vxx.xx” appears on screen.
c) Press main switch to OFF.
The End.
Aux Power Unit
Diagram
X = 0.297 ± 0.015
Y = 0.310 ± 0.015
To increase press volume-up button and to
decrease press volume-down button
RED GAIN alter X coordinate
GREEN GAIN alter ‘Y” coordinate
BLUE GAIN alter “X” and “Y” coordinate
2.3 The changes introduced can be memorized
by pressing button (1) on TV set.
2.4 Exit Service Mode and check colour
coordinates “X” and ‘Y” at 20 and 110 NITS. It
may be necessary to repeat procedure 1 and 2
of COLOUR ADJUSTMENT.
ACCESS TO NVM
Press CH UP to move in the following secuence:
ALTER NVM PAG > ALTER NVM POS > ALTER
NVM VAL
to alter preseting adjustments, press up/downvolume buttons on ALTER NVM VAL.
CAUTION: Do not change NVM VALUE to avoid
risk of serious damages to TV set.
CONTRAST ADJUSTMENT
Up/Down-volume buttons are used to adjust the
contrast of the following items:
-TELETEXT MIX MODE CONTRAST
-TELETEXT CONTRAST
-OSD CONTRAST
Terminal PCB’sDiagram
DVCO ADJUSTMENT
a) Receive Philips pattern signal.
b) When Stand-by button is pressed (Remote
Control Unit), start automatically the adjustment.
LUMA CHROMA DELAY
a) Receive Philips pattern signal.
b) When volume-up button is pressed, luma
phase delays.
c) When volume-down button is pressed,
chroma phase delays.
d) Adjust the Chroma-Luma delay.
OPC VALUE
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SHARP 66DW -18H
100 Hz Diagram
Page 4
SHARP 66DW -18H
Scart A/V Diagram
Page 5
SHARP 66DW -18H
CRT Base PCB Diagram
Front Control Diagram
Mother Board Diagram W aveforms
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