Sharp 27R-FS1 User manual

1
27R-FS1
COLORTELEVISION
Chassis No.V01A
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.
S61W527R-FS1/
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
»ELECTRICAL SPECIFICATIONS ...........................................................................................................1
»IMPORTANT SERVICE SAFETY PRECAUTION ...................................................................................2
»LOCATION OF USER'S CONTROL .......................................................................................................4
»INSTALLATION AND SERVICE INSTRUCTIONS..................................................................................5
»CHASSIS LAYOUT ...............................................................................................................................12
»BLOCK DIAGRAM ................................................................................................................................14
»SCHEMATIC DIAGRAMS.....................................................................................................................16
»PRINTED WIRING BOARD ASSEMBLIES ..........................................................................................28
»REPLACEMENT PARTS LIST..............................................................................................................34
»PACKING OF THE SET........................................................................................................................47
Page
CONTENTS
SERVICE MANUAL
27R-FS1
MODEL
ELECTRICAL SPECIFICATIONS
SPEAKER
SIZE ..................................................................... 10 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
(EIA, Channel Plan U.S.A.)
POWER INPUT...................................................... 120V AC 60 Hz
POWER RATING .................................................................. 134W
PICTURE SIZE ........................................ 1,240cm2 (192.2sq 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 .................... 5W + 5W (at 10% distortion and
Dual CH Operate)
Specifications are subject to change without
prior notice.

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27R-FS1
IMPORTANT SERVICE 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:
CAUTION: FOR CONTINUED
PROTECTION AGAINST A
RISK OF FIRE, REPLACE
ONLYWITH SAMETYPE 6.3A-
125V FUSE.
X-RADIATION AND HIGH VOLTAGE LIMITS
1. Be sure all service personnel are aware of the
proceduresandinstructions coveringX-radiation.The
only potential source of X-ray in current solid state
TVreceiversisthepicturetube.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. Highvoltageshouldalwaysbekeptattherated 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. Whenthehighvoltageregulatorisoperatingproperly
thereisno possibility ofanX-radiationproblem. Every
time a colour chassis is serviced, the brightness
should be tested while monitoring the high voltage
with a meter to be certain that the high voltage does
notexceedthespecifiedvalue and that itisregulating
correctly.
5. Do not use a picture tube other than that specified or
make unrecommended circuit modifications to the
high voltage circuitry.
6. Whentroubleshootingandtaking test measurements
onareceiver with excessivehighvoltage,avoidbeing
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
regulator circuit and the horizontal output circuit. The
isolatedground system is for the low 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 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 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.
6.3A 125V

3
27R-FS1
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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
necessarilyincreasedby usingreplacementcomponents
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.
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, 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
resistorparalleledby a 0.15µFcapacitorinseries with
all exposed metal cabinet parts and a known earth
ground,suchaselectricalconduit or electrical ground
connected to earth ground.
•Use anAC voltmeter having with 5000 ohm per volt,
or higher, sensitivity to measure theAC voltage drop
across the resistor.
BEFORE RETURNING THE 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, 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.)
Anycurrentmeasuredmust 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.
For continued protection, replacement parts must be
identical to those used in the original circuit. The use of
substitutereplacementparts which donothavethesame
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
AC
VOLTMETER

4
27R-FS1
LOCATION OF USER'S CONTROL
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.
Press 2 times →Switch to external video
INPUT 2 mode.
Press 3 times →Switch to external
video INPUT 3 mode or COMPONENT
mode.
Press 4 times →Switch back to the
original TV mode.
ENTER
Used in some instances where a Cable
Converter Box requires an “enter”
command after selecting channels,
when using the REMOTE KEYPAD
button.
CHANNEL UP/DOWN
(') Selects next higher channel.
( ) Selects next lower channel.
•Moves the “»” mark of the MENU
screens.
MUTE
Press →Mutes sound.
Press again →Restores sound.
• CLOSED CAPTION appears when
sound is muted.
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.
1 2 3
4 5 6
7 8 9
0 100
POWER
TV
MENU MUTE
PAUSE
FLASHBACK
DISPLAY INPUT
TV • CATV •VCR • DVD
STOP REC
REW PLAY FF
CH/SKIP
VOL
—
CH
CH
VOL
+
ENTER
A B C D
PERSONAL PREFERENCE
DVD
VCR
CATV TV
DVD VCR
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/down and Random 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
Front Panel
CHANNEL UP/DOWN
('
'
) Selects next higher channel.
( ) Selects next lower channel.
SENSOR AREA FOR
REMOTE CONTROL
POWER
Press →On.
Press again →Off.
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
VIDEO/AUDIO IN 2 TERMINALS
MENU.
Press →Accesses MAIN
MENU.
Press again →Exits MAIN
MENU.
'
(INSIDE DOOR)

5
27R-FS1
CIRCUIT PROTECTION
The receiver is protected by a 6.3A fuse (F701),
mounted on PWB-C, 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 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 to TP653 and make sure
that the voltmeter reads 11.10±0.9V.
5. Apply external 14.5V DC at TP653 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.
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 120V AC
linevoltage,with astrongair signaloraproperly tuned
in test signal.
3. Enter the service mode and select the service No.
"V10" and Bus data "01" (Y-mute on).
4. Thevoltageshouldbeapproximately,32.0kV(atzero
beam).
Ifacorrect readingcannotbeobtained, checkcircuitry
formalfunctioningcomponents.After the voltage test,
make Y-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
27R-FS1
D01 55 2
Figure A.
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-C" 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 controller or at the set.
The service adjustment number will vary in
increments of one, from "D01" to "OP05". 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.
While pressing the Vol-up and Ch-up buttons at the
sametime, 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.
DATANUMBER
CHANNEL
SERVICE ADJUSTMENT NUMBER

7
27R-FS1
ADJUSTMENT ITEM
DATA ADJUSTMENT CONTENTS
SERVICE
NUMBER
COMPONENT ZOOM
16:94:3
VIDEO
INITIAL VALUE
RANGE RF RF VIDEO COMPONENT 4:3
D01 PICTURE HEIGHT 00~63 30 19 37
D02 V-LINEARITY 00~15 09 09 08
D03 V-S CORRECTION 00~07 05 05 06
D04 PICTURE WIDTH 00~63 45 45 36
D05 E-W PARABOLA 00~31 13 08 18
D06 E-W CORNER 00~15 05 05 02
D07 TRAPEZIUM 00~15 07 07 07
D08 V-POSITION 00~127 44 46 45
D09 H-POSITION 00~31 21 21 21
D10 UPER MASK END 01~63 01 14 15
Must be set to "01" Must be set to "14" Must be set to "15"
D11 LOWER MASK START 00~255 140 125 124
Must be set to "140" Must be set to "125" Must be set to "124"
D12 LEFT MASK END 01~127 65 65 80
Must be set to "65" Must be set to "65" Must be set to "80"
D13 RIGHT MASK START 00~127 117 117 108
Must be set to "117" Must be set to "117" Must be set to "108"
D14 OFFSET V-POSITION 00~100 50 50 50
Must be set to "50" Must be set to "50" Must be set to "50"
D15 OSD POSITION 00~31 25
D16 OSD SL 00~31 00
Must be set to "00"
V01 PICTURE 00~63 24 24 24
V02 TINT 00~127 34 34 38
V03 COLOR 00~127 36 36 44
V04 BRIGHT 00~127 51 51 48
V05 R CUT-OFF 00~255 64 64 64
V06 G CUT-OFF 00~255 64 64 64
V07 B CUT-OFF 00~255 64 64 64
V08 G DRIVE 00~127 64 64 64
V09 B DRIVE 00~127 64 64 64
V10 Y-MUTE/V-OFF 00~01 00
Must be set to "00"
V11 SHARPNESS OFFSET 20~83 55 55 55
Must be set to "55" Must be set to "55" Must be set to "60"
V12 OFFSET PICTURE (SUB-CON) 40~55 52 48 53
Must be set to "52" Must be set to "48" Must be set to "53"
V13 OFFSET BRIGHT 00~100 50 51 55
Must be set to "50" Must be set to "51" Must be set to "55"
V14 SUB-CONTRAST 00~31 15 15 15
Must be set to "15" Must be set to "15" Must be set to "15"
V15 OFFSET TINT (RF/VIDEO/COMPONENT) 20~70 51 51 51
Must be set to "51" Must be set to "51" Must be set to "51"
V16 OFFSET TINT (S-VIDEO) 20~80 50
Must be set to "50"
V17 BPF 00~01 01 00 00
Must be set to "01" Must be set to "00" Must be set to "00"
V18 BLACK STRECH START POINT 00~07 06
Must be set to "06"
V19 ABL POINT 00~03 00
Must be set to "00"
V20 ABL GAIN 00~03 03
Must be set to "03"
V21 ENERGY SAVE (ABL-CONT) 00~255 77
Must be set to "77"
V22 ENERGY SAVE (SVM-CONT) 00~255 125
Must be set to "125"
V23 ENERGY SAVE (BLACK LEVEL OFFSET) 00~100 52
Must be set to "52"
V24 COLOR-γ00~01 01
Must be set to "01"
V25 RGB-γ00~01 00
Must be set to "00"
V26 COLOR TEMPARATURE, G DRIVE OFFSET 00~100 52
Must be set to "52"
HIGH 14,500°K
V27 COLOR TEMPARATURE, B DRIVE OFFSET 00~100 57
Must be set to "57"
HIGH 14,500°K
V28 COLOR TEMPARATURE, G DRIVE OFFSET 00~10 47
Must be set to "47"
ML 9,300°K
Table - A
16:9 ZOOM

8
27R-FS1
ADJUSTMENT ITEM
DATA ADJUSTMENT CONTENTS
SERVICE
NUMBER
COMPONENT ZOOM
16:94:3
VIDEO
INITIAL VALUE
RANGE RF RF VIDEO COMPONENT 4:3
V29 COLOR TEMPARATURE, B DRIVE OFFSET 00~100 40
Must be set to "40"
ML 9,300°K
V30 COLOR TEMPARATURE, G DRIVE OFFSET 00~100 41
Must be set to "41"
LOW 6,500°K
V31 COLOR TEMPARATURE, B DRIVE OFFSET 00~100 24
Must be set to "24"
LOW 6,500°K
V32 CHORMA RELATIVE PHASE/AMPLITUDE 00~03 00 00 00
Must be set to "00" Must be set to "00" Must be set to "00"
M01 INPUT LEVEL (ATT) 00~15 09
M02 MTS VCO 00~63 28
M03 FILTER 00~63 28
M04 WIDE BAND 00~63 18
M05 SPECTRAL 00~63 38
M06 FAO LEVEL 00~63 44
OP01 V-CHIP 00~01 01
Must be set to "01"
OP02 SCREEN FORMAT 00~01 01
Must be set to "01"
OP03 DEMO MODE 00~01 01
Must be set to "01"
OP04 ENGL/ESPA 00~01 01
Must be set to "01"
OP05 SYNC FIX at NO SIGNAL 00~01 01
Must be set to "01"
Table - A
16:9 ZOOM

9
27R-FS1
SERVICE ADJUSTMENT
Screen Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No.
"V03" and set the data value to "00" to set the color
level to minimum. (Record original data code under
No. "V03" before changing) You may skip this step, if
you selected a B/W picture or monoscope pattern.
3. SelecttheserviceNo."V10" andadjustthedatavalue
to "01", this turn off the luminance signal (Y-mute).
4. Select the service No. "V04" and adjust data value to
"51".
5. Adjust the master screen control until the raster
darkens to the point where raster is barely seen.
6. Adjust the service numbers "V05" red, "V06" green
and "V07" blue to obtain a good grey scale with
normal whites at low brightness level.
7. Select the service No. "V10" and reset data to "00".
Select the service No. "V03" and reset data to obtain
normal color level.
8. 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 No.
"V03"andset to "00"(minimumcolor)(Recordoriginal
datacode under adjustment "V03" before changing).
"V03" does not have to be adjusted, if you selected a
B/W picture or monoscope pattern.
3. Alternately adjust the service numbers "V08" and
"V09" until a good grey scale with normal whites is
obtained.
4. SelecttheserviceNo."V03"andadjustdata 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 No.
"V01".
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 No.
"V02".
4. Adjust "V02" data value to obtain normal flesh tones.
Video-Tint Adjustment
1. Enter the service mode and select the service No.
"V15".
2. Adjust "V15" data value to "V02" data value.
Sub-Color Adjustment
1. Receive a good local channel.
2. Make sure the customer color control is set to center
position .
3. Enter the service mode and select the service No.
"V03".
4. Adjust "V03" data value to obtain normal color level.
Sub-Brightness Adjustment
1. Receive a good local channel.
2. Make sure the customer brightness control is set to
center position.
3. Enter the service mode and select the service No.
"V04".
4. Adjust "V04" data value to obtain normal brightness
level.
Vertical Linearity Adjustment
1. Receive a good CATV channel.
2. Set to standard setting mode.
3. Enter the service mode and select the service No.
"D02".
4. While observing the top and bottom of the screen,
adjust "D02" data value to proper vertical linearity.
Vertical Phase Adjustment
1. Enter the service mode and select the service No.
"D08".
2. Adjust data value to "00".
Note: This must be set "00" when changed data
retrace line will appear.
Vertical-Size Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No.
"D01".
3. While observing the top and bottom of the screen,
adjust "D01" data value to proper vertical size.

10
27R-FS1
Figure B.
Side Pincushion Adjustment
1. Receive a good CATV channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No.
"D05".
4. Adjust the data of service No. "D05" so that the
outermost line on the screen be straight.
Horizontal Position Adjustment
1. Receive a good CATV channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No.
"D09".
4. Adjust so that the left and right overscans are equal
to each other.
Horizontal Size Adjustment
1. Receive a good CATV channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No.
"D04".
4. Vary the data of service No. "D04" to obtain the best
horizontal size.
Trapezoidal Distortion Adjustment
1. Receive a good CATV channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No.
"D07".
4. Adjustsothattheleftmostandrightmostverticallines
are parallel to each other.
Corner Distortion Adjustment
1. Receive a good CATV channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select the service No.
"D06".
4. Adjust so that the vertical lines should be straight.
Caption Position Adjustment (Horizontal)
1. Receive a good local channel.
2. Enter the service mode and select the service No.
"D15".
3. A black text box appears on the screen. (see Figure
B below)
4. Adjust "D15" data value so that text box is positioned
in the center of the screen.
Sharpness Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service No.
"V11".
3. Adjust data value to "55" (center of data range).

11
27R-FS1
ËMTS ADJUSTMENT
MTS Level Adjustment
1. Feed the following monaural signal to pin (14) of
IC3001.
Monaural signal : 300Hz, 245mVrms
2. Connect the rms voltmeter to pin (39) of IC3001.
3. Enter the service mode and select the service No.
"M01".
4. Adjust the data so that the rms voltmeter reads.
Spec : 490 ±10mVrms.
MTS VCO Adjustment
1. Keep the unit in no-signal state.
2. Connectthe frequency counter to pin (39) of IC3001.
3. Connect a capacitor (100µF, 50V) in between
positive(+) side of C3005 and ground.
4. Enter the service mode and select the service No.
"M02"
5. Adjust the data so that the frequency counter reads.
Spec : 62.94 ±0.75kHz.
Filter Adjustment
1. Feed the following stereo pilot signal to pin (14) of
IC3001 .
Stereo pilot signal: 9.4kHz, 600mVrms.
2. Enter the service mode and select the service No.
"M03".
3. Adjust the data until "OK" appears in position on the
screen. Make sure the "OK" is displayed almost at
the center of the data range.
Separation Adjustment
1. Connect the rms voltmeter to pin (39) of IC3001.
2. Receive the following composite stereo signal 1.
Composite stereo signal: 30% modulation, left
channel only, noise reduction on, 300Hz
3. Enter the service mode and select the service No.
"M04".
4. Adjust the data until the AC voltage reading of the
rms voltmeter is minimum.
5. Receive the following composite stereo signal 2.
Stereo signal: 30% modulation, left channel only,
noise reduction on, 3kHz
6. Enter the service mode and select the service No.
"M05".
7. Adjust the data until the AC voltage reading of the
rms voltmeter is minimum.
8. Take the above steps 1 thru 7 again for fine
adjustment.

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27R-FS1
12
121110987654321
A
B
C
D
E
F
G
H
CHASSIS LAYOUT

15
27R-FS1
14
121110987654321
A
B
C
D
E
F
G
H
BLOCK DIAGRAM

16
27R-FS1
DESCRIPTION OF SCHEMATIC DIAGRAM
NOTES:
1. The unit of resistance "ohm" is omitted.
(K=k Ω =1000 Ω , M=M Ω )
2. All resistors are 1/16 watt, unless otherwise noted.
3. All capacitors are µ F, 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
voltagesetat120VACand all controlsset for normal
picture unless otherwise indicated.
2. All voltages measured with 1000µ V B & W or Color
signal.
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.)
å 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.
WAVEFORMS
1234
Horiz Rate Horiz Rate Horiz Rate 77KHz
789
Horiz Rate Horiz Rate Horiz Rate
wer
Vert Rate Horiz Rate Horiz Rate
5
77KHz
0
Vert Rate
6
77KHz
q
Horiz Rate
130Vp-p
240Vp-p
1.5Vp-p 50Vp-p
0.8Vp-p
125Vp-p 145Vp-p
180Vp-p
1.4Vp-p 9Vp-p
1170Vp-p
12Vp-p 400Vp-p
2Vp-p

17
654321
A
B
C
D
E
F
G
H
27R-FS1
SCHEMATIC DIAGRAM: CRT Unit

19
27R-FS1
18
121110987654321
A
B
C
D
E
F
G
H
SCHEMATIC DIAGRAM: MAIN Unit-1/3

21
27R-FS1
20
121110987654321
A
B
C
D
E
F
G
H
SCHEMATIC DIAGRAM: MAIN Unit-2/3

23
27R-FS1
22
121110987654321
A
B
C
D
E
F
G
H
SCHEMATIC DIAGRAM: MAIN Unit-3/3

25
27R-FS1
24
121110987654321
A
B
C
D
E
F
G
H
SCHEMATIC DIAGRAM: POWER Unit

26
654321
A
B
C
D
E
F
G
H
27R-FS1
SCHEMATIC DIAGRAM: MTS MODULE Unit