SHARP 32RS60 Service Manual

32R-S60

SERVICE MANUAL

S81Z732R-S60/

COLOR TELEVISION

Chassis No. MS-B

MODEL

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.

32R-S60

CONTENTS

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 ...................................................................................................................14

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................23

» REPLACEMENT PARTS LIST ............................................................................................................27

» PACKING OF THE SET ......................................................................................................................36

ELECTRICAL SPECIFICATIONS

POWER INPUT ..................................................... 120V AC 60 Hz

POWER RATING .................................................................. 152W

PICTURE SIZE ........................................... 3,073cm2 (476sq 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)

SPEAKER

SIZE ................................................. 12 cm × 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.)

Specifications are subject to change without prior notice.

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

32R-S60

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:

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 nonisolated (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

4A 125V

ONLY WITH SAME TYPE 4A125V FUSE.

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 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 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 HIGH VOLTAGE 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 "High Voltage Check" instructions. It is only when high voltage is excessive that Xradiation 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.

IMPORTANT SERVICE SAFETY PRECAUTION

1.5k ohm 10W

0.15µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

(Continued)

32R-S60

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, 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 nonpolarized 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.

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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.

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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.

32R-S60

LOCATION OF USER'S CONTROL

Front Panel

POWER

Press → On. Press again → Off.

SENSOR AREA FOR REMOTE CONTROL

Press → Accesses MAIN MENU. Press again → Exits MAIN MENU.

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.

VOLUME UP/DOWN

(+) Increases sound. ( ) Decreases sound.

VIDEO/AUDIO TERMINALS

CHANNEL UP/DOWN – MENU

(') 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 1 mode. Press 2 times → Switch to external 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

screen.

IN 2

mark of the MENU

MUTE

Press → Mutes sound. Press again → Restores sound.

CLOSED CAPTION appears when

sound is muted.

Press → Accesses MAIN MENU. Press again → Exits MAIN MENU.

DISPLAY

Press → Displays receiving channel for four seconds. Press again → Removes display.

Temporarily displays receiving channel when in Closed Caption mode.

32R-S60

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.

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 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 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 TP651 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.

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 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, make Y-mute off to the normal mode.

32R-S60

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 service 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 Chdown button on the remote controller or at the set. The service adjustment number will vary in increments of one, from "V01" to "P08". Select the item you wish to adjust.

3. Data number selection

Press the Vol-up or Vol-down button to adjust the data number.

DATA NUMBER

SERVICE ADJUSTMENT NUMBER

To enter the service mode and exit service mode.

To enter the service mode manually just press and hold the Vol-down and Ch-up buttons at the 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.

CHANNEL

V01

Figure A.

55(085)

32R-S60

SERVICE

NUMBER

V01 PICTURE 03 0-15(00h-0Fh) V02 TINT 3E 0-127(00h-7Fh) V03 COLOR 2D 0-127(00h-7Fh) V04 SUB-COLOR 10 0-31(00h-1Fh) Must be set to "10" V05 BRIGHT 4D 0-127(00h-7Fh) V06 R CUT-OFF 40 64-255(40h-FFh) V07 G CUT-OFF 40 64-255(40h-FFh) V08 B CUT-OFF 40 64-255(40h-FFh) V09 G DRIVE 40 0-127(00h-7Fh) V10 B DRIVE 40 0-127(00h-7Fh) V11 SHARP 14 0-63(00h-3Fh) Must be set to "1E" V12 N PHASE 01 0-3(00h-03h) Must be set to "01" V13 DC RESTORATION 00 0-3(00h-03h) Must be set to "00" V14 BLACK STRETCH 03 0-3(00h-03h) Must be set to "03" V15 ABL START POINT 03 0-3(00h-03h) Must be set to "03" V16 ABL GAIN 02 0-3(00h-03h) Must be set to "02" V17 γ POINT 00 0-3(00h-03h) Must be set to "00" V18 Y-MUTE/V-STOP 00 0-2 Must be set to "00" V19 ENERGY SAVE 28 0-63(00h-3Fh) Must be set to "28" V20 RTONE-G F6 0-255(00h-FFh) Must be set to "F6" V21 RTONE-B F6 0-255(00h-FFh) Must be set to "F6" V22 BTONE-G 00 0-255(00h-FFh) Must be set to "00" V23 BTONE-B 0A 0-255(00h-FFh) Must be set to "0A" V24 LOW-G F7 0-255(00h-FFh) Must be set to "F7" V25 LOW-B E8 0-255(00h-FFh) Must be set to "E8" V26 ML-G 00 0-255(00h-FFh) Must be set to "00" V27 ML-B F9 0-255(00h-FFh) Must be set to "F9" V28 HIGH-G 03 0-255(00h-FFh) Must be set to "03" V29 HIGH-B 06 0-255(00h-FFh) Must be set to "06" V30 WPS 01 0-1 Must be set to "01" V31 RGB CONTRAST 20 0-63(00h-3Fh) Must be set to "2A" V32 Y-DL 02 0-7(00h-07h) Must be set to "02" V33 Y-DL-INPUT 01 0-7(00h-07h) Must be set to "01" V34 VSM GAIN 07 0-7(00h-07h) Must be set to "07" V35 N COMB 01 0-1 Must be set to "01" V36 BPF/TOF-INPUT 00 0-1 Must be set to "00" V37 CORING 00 0-1 Must be set to "00" V38 VSM PHASE 00 0-1 Must be set to "00" V39 COLOR γ 00 0-1 Must be set to "00" V40 SHARP-INPUT 14 0-63(00h-3Fh) Must be set to "1E" V41 TINT-INPUT 3E 0-127(00h-7Fh) V42 PICTURE-COMPONENT 03 0-15(00h-0Fh) V43 TINT-COMPONENT 10 0-31(00h-1Fh) Must be set to "10" V44 COLOR-COMPONENT 30 0-127(00h-7Fh) Must be set to "3A" V45 BRIGHT-COMPONENT 4A 0-127(00h-7Fh) V46 R CUT OFF-COMPONENT 40 64-255(40h-FFh) V47 G CUT OFF-COMPONENT 40 64-255(40h-FFh) V48 B CUT OFF-COMPONENT 40 64-255(40h-FFh) V49 G DRIVE-COMPONENT 40 0-127(00h-7Fh) V50 B DRIVR-COMPONENT 40 0-127(00h-7Fh) V51 SHARP COMPONENT 14 0-63(00h-3Fh) Must be set to "1E" V52 N PHASE-COMPONENT 01 0-3(00h-03h) Must be set to "01" V53 C-TRAP 00 0-1 Must be set to "00"

ADJUSTMENT ITEM

INITIAL VALUE

DATA

ADJUSTMENT CONTENTS

RANGE

R01 RF-AGC 24 0-63(00h-3Fh) R02 PIF VCO coil – – — R03 RF-AGC REF 5C 0-255(00h-FFh) Must be set to "5C"

D01 V POSITION 00 0-7(00h-07h) D02 H POSITION 10 0-31(00h-1Fh) D03 V SIZE 12 0-63(00h-3Fh) D04 H SIZE 1F 0-63(00h-3Fh) D05 V-LINEARITY 07 0-15(00h-0Fh) D06 V-S CORRECTION 08 0-15(00h-0Fh) Must be set to "08" D07 EW PARABOLA 21 0-63(00h-3Fh) D08 EW TRAPEZIUM 0E 0-31(00h-1Fh) D09 EW CORNER 0C 0-15(00h-0Fh) D10 AFC GAIN 02 0-3(00h-03h) Must be set to "02" D11 V EHT 07 0-7(00h-07h) Must be set to "07" D12 H EHT 03 0-7(00h-07h) Must be set to "03"

Table - A

32R-S60

SERVICE

NUMBER

EX1 FAO VOLUME 24 0-50(00h-32h) Must be set to "24" EX2 CC-POSITION 21 0-127(00h-7Fh) EX3 INT 7A 0-255(00h-FFh) Must be set to "7A" EX4 A-ATT 5A 0-127

OP1 OPTION1 BA 0-255(00h-FFh) Must be set to "B0" OP2 OPTION2 01 0-7(00h-07h) Must be set to "31"

M01 INPUT LEVEL 09 0-15(00h-0Fh) Must be set to "09" M02 MTS VCO 24 0-63(00h-3Fh) M03 FILTER 1F 0-63(00h-3Fh) M04 WIDEBAND 18 0-63(00h-3Fh) M05 SPECTRAL 10 0-63(00h-3Fh)

P01 CONTRAST-PIP 32 0-127(00h-7Fh) P02 TINT-PIP 29 0-63(00h-3Fh) Must be set to "29" P03 COLOR-SAT-PIP 32 0-127(00h-7Fh) P04 Y-OFFSET-PIP 09 0-31(00h-1Fh) Must be set to "09" P05 HXA-PIP 0A 0-255(00h-FFh) Must be set to "0A" P06 HADJ-PIP 00 0-15(00h-0Fh) Must be set to "00" P07 FREE RUN-PIP 0B 0-15(00h-0Fh) Must be set to "0B" P08 TINT-PIP-INPUT 24 0-63(00h-3Fh) Must be set to "24"

ADJUSTMENT ITEM

INITIAL VALUE

DATA

ADJUSTMENT CONTENTS

RANGE

Table - A

Holding down both the VOL-up and CH-up buttons on the TV set at service mode for more than 2 seconds will automatically write the above initial values into IC2102.

PART REPLACED

IC2001

IC201

IC2102

CRT

IC3001

NECESSARY UNNECESSARY

ADJUSTMENT

NOTES

Data is stored in IC2102.

The adjustment is needed to compensate for characteristics of parts including IC201 and MTS level (M01).

Holding down both the VOL-up and CH-up buttons on the TV set in the service mode for more than 2 seconds will automatically write the above initial values into IC2102. Then perform a complete adjustment.

Adjust items related to picture tube only.

Adjust items related to MTS only (M01~M05).

Table - B

SERVICE ADJUSTMENT

32R-S60

VCO Adjustment

1. Connect a digital voltmeter between pin (55) of IC201 and ground.

2. Receive a good local channel.

3. Enter the service mode and select the service adjustment "R02".

4. Adjust T201 so that digital voltmeter reads

2.5±1.0VDC.

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 "R01".

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

White Balance Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "V03" and set to "00" (minimum color)(Record original data code 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 adjustment data of "V09" and "V10" until a good grey scale with normal whites is obtained. (RF Input)

4. For component input, the data value of "V49" and "V50" is adjusted to follow the data value of "V09" and "V10" respectively.

5. Select the service adjustment "V03" and reset data to obtain normal color level.

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 "V01".

4. Adjust the data value to achieve normal contrast range.

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "V03" and set the data value to "00" to set the color level to minimum. (Record original data code under adjustment "V03" before changing) You may skip this step, if you selected a B/W picture or monoscope pattern.

3. Select the service adjustment "V18" and adjust the data value to "01", this turn off the luminance signal (Y-mute).

4. Adjust the master screen control until the raster darkens to the point where raster is barely seen.

5. Adjust the service adjustments "V06" red, "V07" green and "V08" blue to obtain a good grey scale with normal whites at low brightness level.

6. Select the service adjustment "V18" and reset data to "00". Select the service adjustment "V03" and reset data to obtain normal color level.

7. For component input, the data value of "V46" red, "V47" green and "V48" blue is adjusted to follow the data value of "V06", "V07" and "V08" respectively.

8. Reset the master screen control to obtain normal brightness range.

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 "V02".

4. Adjust "V02" data value to obtain normal flesh tones.

5. Input same data to "V41".

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 service adjustment "V04".

4. Adjust "V04" data value to obtain normal color level.

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 adjustment "V05".

4. Adjust "V05" data value to obtain normal brightness level.

32R-S60

Vertical-Size and Linearity Adjustments

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D03" for V-size.

3. Adjust the "D03" bus data to get the proper V-size.

4. For V-linearity adjustment, select data bus "D05" and adjust to get the proper vertical linearity. Note: Aging for 10 min before adjustment. After the

adjustment of V-center and V-size, readjustment for this V-line.

Vertical Phase Adjustment

1. Enter the service mode and select the service adjustment "D01".

2. Adjust "D01" data value so that picture is centered.

Horizontal Position Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D02".

3. Adjust "D02" data value so that picture is centered.

Caption Position Adjustment (Horizontal)

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "EX2".

3. A black text box appears on the screen. (see

below)

4. Adjust "EX2" data value so that text box is positioned in the center of the screen.

Figure

Horizontal-Size Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D04" for H-size.

3. Adjust the "D04" bus data to get the proper H-size.

EW-Parabola

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D07" for EW parabola.

3. Adjust the "D07" bus data to get the proper vertical straight line for both left and right side.

EW-Trapezium

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D08" for EW-Trapezium.

3. Adjust the "D08" bus data to get the best position display.

EW-Corner

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D09" for EW-Corner.

3. Adjust the "D09" bus data to get the best linearity for 4 corner points.

Other Adjustments

1. Enter the service mode.

2. Adjust the following data values as listed below.

Figure B.

SERVICE

POSITION

OP1 OP2

ADJUST

ITEM OPTION1 OPTION2

DATA(Hex)

32R-S60

B0 31

+ 23 hidden pages