Sharp 36U-S610 User manual

36U-S610
SERVICE MANUAL
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.
MODEL
36U-S610
COLORTELEVISION
Chassis No. GB-1
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Page
»ELECTRICAL SPECIFICATIONS .........................................................................................................1
»IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
»LOCATION OF USER'S CONTROL .....................................................................................................4
»INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5
»SERVICE ADJUSTMENT .....................................................................................................................9
»CHASSIS LAYOUT .............................................................................................................................12
»BLOCK DIAGRAM ..............................................................................................................................13
»SCHEMATIC DIAGRAMS ...................................................................................................................15
»PRINTED WIRING BOARD ASSEMBLIES ........................................................................................25
»REPLACEMENT PARTS LIST ............................................................................................................32
»PACKING OF THE SET ......................................................................................................................42
CONTENTS
SPEAKER
SIZE ........................................................ 12 x 6 cm oval (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
(EIA, Channel Plan U.S.A.)
POWER INPUT..................................................... 120V AC 60 Hz
POWER RATING .................................................................. 167W
PICTURE SIZE ........................................... 3,905cm2 (605sq 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)
AUDIO POWER
OUTPUT RATING ..............3.0W + 3.0W (at 10% distortion and
Dual CH Operate)
Specifications are subject to change without
prior notice.
ELECTRICAL SPECIFICATIONS

36U-S610
2
IMPORTANT SERVICE SAFETY PRECAUTION
ËService 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 modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
3. Semiconductor heatsinks arepotential 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
regulator circuit.The isolated ground system is for
the low B+ DC voltages 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.
CAUTION: FOR CONTINUED
PROTECTION AGAINST A
RISK OF FIRE, REPLACE
ONLY WITH SAME TYPE 4A-
125V FUSE.
4A 125V
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 receiveremploys integralimplosion
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.
X-RADIATION AND HIGHVOLTAGE LIMITS
1. Be sure all service personnel are aware of the
procedures and instructions covering X-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 "HighVoltage
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. High voltage should always be kept at the rated value
−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. When the high voltage regulator is operating properly
there is no possibility of an X-radiation problem.Every
time a color chassis is serviced, the brightness 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. When trouble shooting and taking test measurements
on a receiver with excessive high voltage, avoid being
unnecessarily close to the receiver.
Do not operate the receiver longer than is necessary
to locate the cause of excessive voltage.

36U-S610
3
IMPORTANT SERVICE SAFETY PRECAUTION
(Continued)
BEFORE RETURNINGTHE 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, 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 exposed metal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon, 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 non-
polarized adapter plug must be used only for the
purpose of completing these check.)
Any current measured must not exceed 0.5 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.
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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
necessarily increased by using replacement components
rated for higher voltage, wattage, 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.
For continued protection, replacement parts must be
identical to those used in the original circuit.The use of
substitute replacement parts which do not have the same
safety characteristics as the factory recommended
replacement parts shown in this service manual, may
create shock, fire, X-radiation or other hazards.
1.5k ohm
10W
0.15µF
TEST PROBE
TO EXPOSED
METAL PARTS CONNECT TO
KNOWN EARTH
GROUND

36U-S610
4
LOCATION OF USER'S CONTROL
Front Panel
POWER
Press On.
Press again Off.
Note:
• The above shaded buttons on the Remote Control glow in the dark. To use the glow-in-the-dark display on the remote
control, place it under a fluorescent light or other lighting.
• The phosphorescent material contains no radioactive or toxic material, so it is safe to use.
• The degree of illumination will vary depending on the strength of lighting used.
• The degree of illumination will decrease with time and depending on the temperature.
• The time needed to charge the phosphorescent display will vary depending on the surrounding lighting.
• Sunlight and fluorescent lighting are the most effective when charging the display.
CHANNEL UP/DOWN
(
|
|
) Selects next higher
channel.
( ) Selects next lower
channel.
•Press both at the same
time to access the MAIN
MENU screen.
SENSOR AREA FOR
REMOTE CONTROL
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
MENU
Press Accesses MAIN MENU.
Press again Exits MAIN MENU.
IN 2
VIDEO L-AUDIO-R
(INSIDE DOOR)
→→
→
→
123
456
789
0
100
POWER
TV
MENU MUTE
PAUSE
PIP
FLASHBACK
DISPLAY
INPUT
TV • CATV • VCR • DVD
STOP REC
REW PLAY FF
CH/SKIP
SWAP FREEZE MOVE SELECT
VOL
—
CH
CH
VOL
+
ENTER
ABCD
PERSONAL PREFERENCE
DVD
VCR
CATV TV
DVD VCR
Infrared Transmitter Window
DISPLAY
Press →Displays receiving channel for
four seconds.
Press again →Removes display.
• Temporarily displays receiving
channel when in Closed Caption
mode.
INPUT
Press →Switch to external video
INPUT 1 mode.
Press2times →Switchtoexternalvideo
INPUT 2 mode.
Press3times →Switchtoexternalvideo
INPUT3modeorCOMPONENT mode.
Press 4 times →Switch back to the
original TV mode.
ENTER
Usedin someinstances where a Cable
Converter Box requires an “enter”
command after selecting channels,
when using the REMOTE KEYPAD
button.
CHANNEL UP/DOWN
•Moves the “ ” mark of the MENU
screens.
MUTE
Press →Mutes sound.
Press again →Restores sound.
• CLOSED CAPTION appears when
sound is muted.
PIP FUNCTION
With the VIDEO inputs, you can watch
two pictures at the same time.
POWER
Press →On.
Press again →Off.
REMOTE KEYPAD
Accesses any channel from keypad.
FLASHBACK
Returns to previous channel.
PERSONAL PREFERENCE
With the Personal Preference buttons,
you can program your favorite
programs by using the 4 categories A,
B, C and D. The channels can be
accessed quickly by using these
buttons.
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
• In menu mode, changes or selects
the TV adjustments.
MENU
Press →Accesses MAIN MENU.
Press again →Exits MAIN MENU.
CATV/DVD-TV/VCR MODE
SELECT SWITCH
In TV/VCR position, sends power and
channel select commands (Channel
up/downandRandom Access buttons)
to the TV and VCR control.
In CATV/DVD position, sends power
and channel select commands to a
cableTV converter and DVD control.
DVD/VCR CONTROL
Basic Remote Control Functions
(') Selects next higher channel.
(") Selects next lower channel.
»

36U-S610
5
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 PROTECTOR CIRCUITTEST
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 ACusing a variac transformerforaccurate
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 toTP651 and make sure
that the voltmeter reads 13.2 ±0.7V.
5. Apply external 16.3V DC at TP651 by using an
external DC supply, TV must be shut off.
6. To reset the protector, unplug the AC cord and plug
the AC cord power on. Now make 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.
HIGHVOLTAGE 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 120V 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 "V18" and Bus data "01" (Y-mute on, CRT
Cut Off).
4. The voltage should be approximately 33.0kV (at zero
beam).
If a correct reading cannot be obtained, check circuitry
for malfunctioning components. After the voltage test,
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.