Sharp 26SL71 User manual

1
26SL71
29SL81
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
S60B526SL71//
MODELS
SHARP CORPORATION
OUTLINE
SERVICE MANUAL
26SL71
29SL81
COLOR TELEVISION
Chassis No. SN-91A
POWER POWER PUSH OPEN MTS STEREO
This Service Manual covers the modifications from Models 26SL70 and 29SL80. For data and information
not discussed here, please refer to the 26SL70/29SL80 Service Manual (S69J129SL80//).

2
26SL71
29SL81
LIST OF CHANGED PARTS
Ref. No. Description Current (26SL70) New (26SL71) Note
PRINTED WIRING BOARD ASSEMBLIES
PWB-A Main Unit DUNTK9806WEV1 DUNTKA270WEV0
MAIN UNIT
IC751 I.C. VHiKA7809Pi-1 VHiKA7809AP-1 or VHiKA7809Pi-1
IC2001 I.C. RH-iX3256CEZZ RH-iX3366CEZZ
IC2101 I.C. VHiM24C01B/-1 VHiBR24C02/-1
L2040 Coil RCiLB0159CEZZ RCiLB0131CEZZ
J799 Resistor – VRD-RA2BE102J Added
RJ15 Resistor VRS-CY1JF000J – Abolished
RJ16 Resistor VRS-CY1JF000J – Abolished
R2016 Resistor – VRS-CY1JF223J Added
R2017 Resistor – VRS-CY1JF223J Added
R2023 Resistor – VRS-CY1JF223J Added
R2030 Resistor VRS-CY1JF103J – Abolished
R2033 Resistor VRS-CY1JF102J – Abolished
P704 Plug QPLGN0304CEZZ QPLGN0360CEZZ or QPLGN0304CEZZ
POWER UNIT
IC5771 I.C. VHiKA7809Pi-1 VHiKA7809AP-1 or VHiKA7809Pi-1
P5701 Plug QPLGN0404CEZZ QPLGN0460CEZZ or QPLGN0404CEZZ
SUPPLIED ACCESORRIES
Infrared R/C Unit RRMCG1339CESA RRMCG1573CESA
Operation Manual TiNS-6556GJZZ TiNS-7033GJZZ
PACKING PARTS
Packing Case SPAKC0108GJZZ SPAKC0129GJZZ
CABINET PARTS
1 Front Cabinet Ass'y CCABA0008WEH0 CCABA0008WEH3
1-4 Button, Power JBTN-0106GJSA JBTN-0106GJSB
1-6 Door GDORF0102GJSA GDORF0102GJSB

3
26SL71
29SL81
LIST OF CHANGED PARTS
Ref. No. Description Current (29SL80) New (29SL81) Note
PICTURE TUBE
DY601 Deflection Yoke RCiLH0119MEZZ RCiLH0104GJZZ
PRINTED WIRING BOARD ASSEMBLIES
PWB-A MAIN Unit DUNTK9806WEV2 DUNTKA270WEV1
MAIN UNIT
IC751 I.C. VHiKA7809Pi-1 VHiKA7809AP-1 or VHiKA7809Pi-1
IC2001 I.C. RH-iX3256CEZZ RH-iX3366CEZZ
IC2101 I.C. VHiM24C01B/-1 VHiBR24C02/-1
L2040 Coil RCiLB0159CEZZ RCiLB0131CEZZ
J799 Resistor – VRD-RA2BE102J Added
RJ15 Resistor VRS-CY1JF000J – Abolished
RJ16 Resistor VRS-CY1JF000J – Abolished
R2016 Resistor – VRS-CY1JF223J Added
R2017 Resistor – VRS-CY1JF223J Added
R2026 Resistor VRD-RA2BE682J VRD-RA2BE562J
R2033 Resistor VRS-CY1JF102J – Abolished
P704 Plug QPLGN0304CEZZ QPLGN0360CEZZ or QPLGN0304CEZZ
POWER UNIT
IC5771 I.C. VHiKA7809Pi-1 VHiKA7809AP-1 or VHiKA7809Pi-1
P5701 Plug QPLGN0404CEZZ QPLGN0460CEZZ or QPLGN0404CEZZ
SUPPLIED ACCESORRIES
Infrared R/C Unit RRMCG1339CESA RRMCG1573CESA
Operation Manual TiNS-6556GJZZ TiNS-7033GJZZ
PACKING PARTS
Packing Case SPAKC0008GJZZ SPAKC0130GJZZ
CABINET PARTS
1 Front Cabinet Ass'y CCABA0007WEH0 CCABA0007WEH3
1-4 Button, Power JBTN-0005GJSA JBTN-0005GJSB
1-6 Door GDORF0001GJSA GDORF0001GJSB

5
26SL71
29SL81
4
121110987654321
A
B
C
D
E
F
G
H
7001GEFW
MODEL 26SL71 SCHEMATIC DIAGRAM:MAIN-1 Unit

7
26SL71
29SL81
6
121110987654321
A
B
C
D
E
F
G
H
MODEL 26SL71 SCHEMATIC DIAGRAM:MAIN-2 Unit

9
26SL71
29SL81
8
121110987654321
A
B
C
D
E
F
G
H
7001GEFW
MODEL 29SL81 SCHEMATIC DIAGRAM:MAIN-1 Unit

11
26SL71
29SL81
10
121110987654321
A
B
C
D
E
F
G
H
MODEL 29SL81 SCHEMATIC DIAGRAM:MAIN-2 Unit

12
26SL71
29SL81
654321
A
B
C
D
E
F
G
H
SCHEMATIC DIAGRAM: POWER Unit

13
26SL71
29SL81
654321
A
B
C
D
E
F
G
H
PRINTED WIRING BOARD ASSEMBLIES
PWB-A: MAIN Unit (Wiring Side)

14
26SL71
29SL81
PWB-A: MAIN Unit (Component Side)
654321
A
B
C
D
E
F
G
H

15
26SL71
29SL81
Ref. No. Part No. ★Description Code
PICTURE TUBE
PARTS LIST
PARTS REPLACEMENT
Replacement parts which have these special safety characteristics
identified in this manual; electrical components having such features
areidentifiedbyåand shadedareas inthe ReplacementParts 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 NUMBER 2. REF. NO.
3. PART NO. 4. DESCRIPTION
★ MARK : SPARE PARTS-DELIVERY SECTION
'MARK : X- RAY RELATED PARTS
Ref. No. Part No. ★Description Code
PWB-A : DUNTKA270WEV0 (26SL71)
PWB-A : DUNTKA270WEV1 (29SL81)
MAIN UNIT
çå DY601 RCiLH0104GJZZ X Deflection Yoke BE
(29SL81)
PRINTED WIRING BOARD ASSEMBLIES
(NOT REPLACEMENT ITEM)
PWB-A DUNTKA270WEV0 – MAIN Unit (26SL71) —
PWB-A DUNTKA270WEV1 – MAIN Unit (29SL81) —
INTEGRATED CIRCUITS
åIC751 VHiKA7809AP-1 J KA7809AP AE
or
VHiKA7809Pi-1
IC2001 RH-iX3366CEZZ J I.C. AU
IC2101 VHiBR24C02/-1 J BR24C02 AF
COIL
L2040 RCiLB0131CEZZ J Oscillation Coil AE
RESISTORS
[M-Ox.···Metal Oxide]
J799 VRD-RA2BE102J J 1.0k 1/8W Carbon AA
R2016 VRS-CY1JF223J J 22k 1/16W M-Ox. AA
R2017 VRS-CY1JF223J J 22k 1/16W M-Ox. AA
R2023 VRS-CY1JF223J J 22k 1/16W M-Ox. AA
(26SL71)
R2026 VRD-RA2BE562J J 5.6k 1/8W Carbon AA
(29SL81)
MISCELLANEOUS PARTS
P704 QPLGN0360CEZZ J Plug, 3-pin (PC) AC
or
QPLGN0304CEZZ
PWB-P : DUNTK9830WEV2
POWER UNIT
INTEGRATED CIRCUITS
åIC5771 VHiKA7809AP-1 M KA7809 AE
or
VHiKA7809Pi-1
MISCELLANEOUS PARTS
P5701 QPLGN0460CEZZ J Plug, 4-pin (M) AC
or
QPLGN0404CEZZ
SUPPLIED ACCESORRIES
RRMCG1573CESA M Infrared R/C Unit AW
TiNS-7033GJZZ X Operation Manual AN
PACKING PARTS
(NOT REPLACEMENT ITEM)
SPAKC0129GJZZ – Packing Case (26SL71) —
SPAKC0130GJZZ – Packing Case (29SL81) —
CABINET PARTS
26SL71
1 CCABA0008WEH3 X Front Cabinet Ass'y BF
1-4 JBTN-0106GJSB X Button, Power AH
1-6 GDORF0102GJSB X Door AM
29SL81
1 CCABA0007WEH3 X Front Cabinet Ass'y BF
1-4 JBTN-0005GJSB X Button, Power AH
1-6 GDORF0001GJSB X Door AM

16
26SL71
29SL81
SHARP CORPORATION
AV Systems Group
Quality & Reliability Control Center
Yaita, Tochigi 329-2193, Japan
TQ0907-S
Jun. 2000 Printed in Japan
MI. KG
COPYRIGHT © 2000 BY SHARP CORPORATION
ALL RIGHTS RESERVED.
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.

1
26SL40, 26SL70
29SL80
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
S69J129SL80//
MODELS
»ELECTRICAL SPECIFICATIONS......................................................................................................... 1
»IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
»LOCATION OF USER'S CONTROL.....................................................................................................4
»INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5
»CHASSIS LAYOUT............................................................................................................................. 11
»BLOCK DIAGRAM ............................................................................................................................. 12
»SCHEMATIC DIAGRAMS................................................................................................................... 15
»PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 33
»REPLACEMENT PARTS LIST............................................................................................................ 37
»PACKING OF THE SET...................................................................................................................... 47
Page
POWER INPUT........................................ 110-220 V AC 50/60 Hz
POWER RATING
26SL40..............................................................................120 W
26SL70..............................................................................125 W
29SL80..............................................................................130 W
PICTURE SIZE
26SL40, 26SL70 ................................... 2,032 cm2(315 sq inch)
29SL80.................................................. 2,193 cm2(340 sq inch)
CONVERGENCE............................................................. Magnetic
SWEEP DEFLECTION .....................................................Magnetic
FOCUS ................................................Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency ...................................... 41.25 MHz
Color Sub-Carrier Frequency..................................... 42.17 MHz
(Nominal)
SHARP CORPORATION
CONTENTS
ELECTRICAL SPECIFICATIONS
Specifications are subject to change without
prior notice.
AUDIO POWER
OUTPUT RATING
26SL40............................................................. 2.5 W + 2.5 W
26SL70, 29SL80 .....................................................5 W + 5 W
(at 5% distortion and Dual CH Operate)
SPEAKER
SIZE ............................................................... 12 ×6 cm (2 pcs.)
VOICE COIL IMPEDANCE ............................... 8 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF .................................................... 75 ohm Unbalanced
TUNING RANGES
VHF-Channels .............................................................. 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels........................................................... 1 thru 125
SERVICE MANUAL
26SL40, 26SL70
29SL80
COLORTELEVISION
Chassis No. SN-91A
POWER POWER PUSH OPEN MTS STEREO

2
26SL40, 26SL70
29SL80
IMPORTANT SERVICE SAFETY PRECAUTION
Service work should be performed only by qualified service technicians who are throughly
familiar with all safety checks and the servicing guidelines which follow:
X-RADIATION AND HIGH VOLTAGE LIMITS
1. Be sure all service personnel are aware of the
proceduresandinstructionscoveringX-radiation.The
only potential source of X-ray in current solid state
TV receivers is the picture tube.However, the picture
tube does not emit measurable X-Ray radiation, if
the high voltage is as specified in the "High Voltage
Check" instructions.
It is only when high voltage is excessive that X-
radiation is capable of penetrating the shell of the
picture tube including the lead in the glass material.
The important precaution is to keep the high voltage
below the maximum level specified.
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. Highvoltage shouldalways bekept atthe ratedvalue
−no higher. Operation at higher voltages may cause
a failure of the picture tube or high voltage circuitry
and;also, under certain conditions, may produce
radiation in exceeding of desirable levels.
4. Whenthe highvoltage regulatoris operatingproperly
thereisno possibilityofan X-radiationproblem.Every
timeacolor chassisis serviced,thebrightness should
be tested while monitoring the high voltage with a
meter to be certain that the high voltage does not
exceed the specified value and that it is regulating
correctly.
5. Do not use a picture tube other than that specified or
make unrecommended circuit modifications to the
high voltage circuitry.
6. Whentrouble shootingandtaking testmeasurements
onareceiver withexcessive highvoltage,avoid being
unnecessarily close to the receiver.
Do not operate the receiver longer than is necessary
to locate the cause of excessive voltage.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
3. Semiconductor heat sinks are potential shock
hazards when the chassis is operating.
4. The chassis in this receiver has two ground systems
which are separated by insulating material.The non-
isolated (hot) ground system is for the B+ voltage
regulatorcircuit and thehorizontaloutputcircuit.The
isolatedground systemisfor thelow B+ DCvoltages
and the secondary circuit of the high voltage
transformer.
To prevent electrical shock use an isolation
transformer between the line cord and power
receptacle, when servicing this chassis.
SERVICING OF HIGH VOLTAGE SYSTEM
AND PICTURETUBE
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 pic-
ture 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 picture tube by the neck.
4. Handle the picture tube only when wearing
shatterproof goggles and after discharging the high
voltage anode completely.

3
26SL40, 26SL70
29SL80
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
1
234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
2
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
1
234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
2
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
SAFETY NOTICE
Many electrical and mechanical parts in television
receivers have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarilyincreasedby usingreplacementcomponents
rated for higher voltage, wattage and etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by "å"
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams.
IMPORTANT SERVICE SAFETY PRECAUTION
(Continued)
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.
•PlugtheACcorddirectly intoa110-220voltACoutlet,
(Do not use an isolation transformer for this test).
•Using two clip leads, connect a 1.5k ohm, 10 watt
resistorparalleledby a0.15µF capacitor inseries with
all exposed metal cabinet parts and a known earth
ground,such aselectrical conduitorelectrical 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.
For continued protection, replacement parts must be
identical to those used in the original circuit.The use of
substitutereplacementparts whichdonot havethesame
safety characteristics as the factory recommended
replacement parts shown in this service manual, may
create shock, fire, X-radiation or other hazards.
BEFORE RETURNINGTHE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks.
•Connect the resistor connection to all exposed metal
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 ine cord
plug connection reversed. (If necessary, a non-
polarized adapter plug must be used only for the
purpose of completing these check.)
Anycurrent measured mustnot exceed0.5 milliamp.
Any measurements not within the limits outlined
above indicate of a potential shock hazard and
corrective action must be taken before returning the
instrument to the customer.
1.5k ohm
10W
0.15µF
TEST PROBE
CONNECT TO
KNOWN EARTH
GROUND
TO EXPOSED
METAL PARTS
AC
VOLTMETER

4
26SL40, 26SL70
29SL80
LOCATION OF USER'S CONTROL
POWER POWER MTS STEREO
VIDEO IN2 L-AUDIO-R– VOL + CH MENU
POWER POWER – VOL + CH MENU
TV
Infrared Transmitter Window
INPUT
Press →Switch to external video
INPUT 1 mode.
Pressagain→Switch toexternal video
INPUT 2 mode.
Press 3 times →Switch back to the
original 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.
DISPLAY
Press→Displays receivingchannel for
4 seconds.
Press again →Removes display.
• Temporarily displays receiving
channel when in Closed Caption
mode.
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.
CHANNEL
UP/DOWN
() Selects next higher
channel.
() Selects next lower
channel.
SENSOR AREA FOR
REMOTE CONTROL VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
POWER
Press →On.
Press again →Off.
VIDEO/AUDIO TERMINALS
(VIDEO/AUDIO terminals are also
provided on the rear.)
IN 2
MENU
Press →Accesses MAIN
MENU.
Press again →Exits MAIN
MENU.
Basic Remote Control Functions
Front Panel

5
26SL40, 26SL70
29SL80
CIRCUIT PROTECTION
The receiver is protected by a 5.0A fuse
(F5701),mounted on PWB-P,wired into one
side of the AC line input.
X-RADIATION PROTECTOR 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 110-220V AC using a variac transformer for
accurate input voltage.
2. Allow for warm up and adjust all customer controls
for normal picture and sound.
3. Receive a good local channel.
4. Connect a digital voltmeter toTP653 and make sure
that the voltmeter reads 11.2 ± 0.6V.
5. Apply external 13.8V DC at TP653 by using an
external DC supply, TV must be shut off.
6. To reset the protector, unplug the AC cord and make
ashortcircuitbetweenTP651 andTP652.Nowmake
sure that normal picture appears on the screen.
7. If the operation of the horizontal oscillator does not
stop in step 5, the circuit must be repaired before the
set is returned to the customer.
HIGH VOLTAGE CHECK
High voltage is not adjustable but must be checked
to verify that the receiver is operating within safe
and efficient design limitations as specified checks
should be as follows:
1. Connect an accurate high voltage meter between
ground and anode of picture tube.
2. Operate receiver for at least 15 minutes at 110-220V
AC line voltage, with a strong air signal or a properly
tuned in test signal.
3. Enter the service mode and select the service
adjustment "S19" and Bus data "01" (Y-mute on).
4. The voltage should be approximately, 28.7kV
(26SL40/70)/29.7kV(29SL80)(at zero beam).
Ifacorrect readingcannotbeobtained, checkcircuitry
formalfunctioning components. Afterthevoltagetest,
makeY-mute off to the normal mode.
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.

6
26SL40, 26SL70
29SL80
Figure A.
S01 02
CHANNEL
SERVICE ADJUSTMENT NUMBER
DATA NUMBER
S01 D:00
For adjustments of this model, the bus data is converted to various analog signals by the D/A converter
circuit.
Note: There are still a few analog adjustments in this series such as focus and master screen voltage.
Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if serv-
ice adjustments are required.
1. Service mode
Before putting unit into the service mode, check that
customer adjustments are in the normal mode. Use
the reset function in the video adjustment menu to
ensure customer controls are in their proper (reset)
position.
2. Service number selection
Once in the service mode, press the Ch-up or Ch-
down button on the remote control unit or at the set.
The service adjustment number will vary in
increments of one, from "S01" to "OP"(26SL40)/
"M05"(26SL70, 29SL80).Select the item you wish to
adjust.
3. Data number selection
Press the Vol-up or down button to adjust the data
number.
To enter the service mode and exit serv-
ice mode.
Whilepressing theVol-up andCh-upbuttonsatthe same
time, plug the AC cord into a wall socket.
Now the TV set is switched on and enters the service
mode.
To exit the service mode, turn the television off by
pressing the power button.
55(085)

7
26SL40, 26SL70
29SL80
SERVICE
NUMBER DATA ADJUSTMENT CONTENTS
ADJUSTMENT ITEM RANGE
INITIAL VALUE
S01 PICTURE 55 00-7F
S02 TINT 46 00-7F
S03 COLOR 32 00-7F
S04 BRIGHTNESS 40 00-7F
S05 SHARPNESS 28/24 00-3F Must be set to "28"(26SL40/70)/"24"(29SL80)
S06 VERTICAL PHASE 00 00-07 Must be set to "00"
S07 HORIZONTAL PHASE 12 00-1F
S08 RF-AGC 23 00-3F
S09 VERTICAL AMP 20 00-3F
S10 PIF VCO 2C 00-7F
S11 R CUT-OFF 00 00-FF
S12 G CUT -OFF 00 00-FF
S13 B CUT-OFF 00 00-FF
S14 G GAIN 7F 00-FF
S15 B GAIN 7F 00-FF
S16 TRAP 00/01 00 or 01 Must be set to "00"(26SL40/70)/"01"(29SL80)
S17 BALANCE 20 00-3F Must be set to "20"
S18 C.C. POSITION 17 00-7F
S19 MUTE 00 00,01,03 "00"=Normal, "01"=NoY, "03"=No Vertical
S20 ENERGY SAVE OFFSET 20 00-3F Must be set to "19"
S21 D.D.E. OFFSET 03 00-1F Must be set to "03"
S22 OSD SETUP 00 00-03 Must be set to "02"
S23 TUNER SETUP 00 00, 01 Must be set to "00"
OP. OPTION (Set to each model) 02/36 00-FF Must be set to "02"= 26SL40, "36"=26SL70, 29SL80
M01 INPUT LEVEL 0A 00-0F
M02 ST VCO 20 00-3F
M03 FILTER 1C 00-3F
M04 WIDE BAND 20 00-3F
M05 SPECTRAL 1B 00-3F
NECESSARY UNNECESSARY
ADJUSTMENT NOTES
PART REPLACED
IC2001
IC2101 X
IC3001 X
CRT X
IC201 X
XData is stored in IC2101.
The adjustment is needed to compensate for characteristics
of parts including IC201 and MTS level (M01).
Holding down both the CH-up/down buttons on theTV set in
the service mode for more than 2 seconds will automatically
write the above initial values into IC2101. Then perform a
complete adjustment.
Adjust items related to picture tube only.
Adjust items related to MTS only (M01~M05).
Holdingdownboth the CH-up/down buttons ontheTV set atservice mode formorethan 2 seconds will automatically
write the above initial values into IC2101.
Table - A
Table - B
Only for Models
26SL70, 29SL80

8
26SL40, 26SL70
29SL80
SERVICE ADJUSTMENT
VCO Adjustment
1. Connecta digitalvoltmeterbetweenpin(44) ofIC201
and ground.
2. Receive a good local channel.
3. Enter the service mode and select the service
adjustment "S10".
4. Adjust the data so that digital voltmeter reads 2.2V.
5. Adjustment is completed, remove the voltmeter,
return to "normal" mode.
RF AGC Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "S08".
3. Set the data value to point where no noise or beat
appears.
4. Select another channel to confirm that no noise or
beat appears.
Note 1: You will have to come out of the service
mode to select another channel.
Note 2: Setting the data to "00" will produce a black
raster.
Screen Adjustment
1. Connect a oscilloscope between TP854 and GND
on the CRT Unit.
2. Receive a good local channel.
3. Enter the service mode and select the service
adjustment "S03" and set the data value to "00" to
set the color level to minimum. (Record original data
code under adjustment "S03" before changing) You
may skip this step, if you selected a B/W picture or
monoscope pattern.
4. Select the service adjustment "S19" and adjust the
data value to "01", this turn off the luminance signal
(Y-mute).
5. Select the service adjustment "S04" and adjust data
value to obtain 2.35V on the oscilloscope screen.
6. Adjust the master screen control until the raster
darkens to the point where raster is barely seen.
7. Adjustthe serviceadjustments"S11"red, "S12"green
and "S13" blue to obtain a good grey scale with
normal whites at low brightness level.
8. Select the service adjustment "S19" and reset data
to"00". Selecttheservice adjustment"S03"and reset
data to obtain normal color level.
9. Remove oscilloscope and reset the master screen
control to obtain normal brightness range.
White Balance Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "S03" and set to "00" (minimum
color)(Record original data code under adjustment
"S03" before changing). "S03" does not have to be
adjusted,if youselected aB/W pictureor monoscope
pattern.
3. Alternatelyadjust theserviceadjustmentdataof"S14"
and "S15" until a good grey scale with normal whites
is obtained.
4. Select the service adjustment "S03" and adjust data
to obtain normal color level.
Sub-Picture Adjustment
1. Receive a good local channel.
2. Make sure the customer picture control is set to
maximum.
3. Enter the service mode and select the service
adjustment "S01".
4. Adjust the data value to achieve normal contrast
range.
Sub-Tint Adjustment
1. Receive a good local channel.
2. Set customer tint control to center of it's range.
3. Enter the service mode and select the service
adjustment "S02".
4. Adjust "S02" data value to obtain normal flesh tones.
Sub-Color Adjustment
1. Receive a good local channel.
2. Makesure the customer color control isset tocenter
position .
3. Enterthe servicemode and selectservice adjustment
"S03".
4. Adjust "S03" data value to obtain normal color level.
2.35V GND