RCA MCR36R310 Service Manual

Components having special safety characteristics are identified by a ( ) on schematics and on parts list in this Service Data and its bulletins. Before

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Nov / 03

VCR Basic Service Data

Models Included: MCR51R410 MCR51R420 MCR53TF30

Contents Page

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Indianapolis, IN 46290 U.S.A.

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Chassis Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

IC Pin Out and Functional Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

IC Voltage / Resistance Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix

Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix

Circuit Board Component Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix

SAFETY NOTICE

servicing this instrument, it is important that the service technician read and follow the “Safety Precautions” in the Basic Service Data.

USE ISOLATION TRANSFORMER WHEN SERVICING

SERVICE MANUAL

SPECIFICATIONS

Model Number MCR51R410 MCR51R420 MCR53TF30

Color

RF system

Video system

Receiving

channel

Channels preset

Picture tube Effective

screen dimensions

(Approx.)

Audio output

(THD

Power source

Weight (Approx.)

Dimensions

H D) (Approx.)

Rated power

consumption

220V AC 50Hz

Designs and specifications are subject to change without notice.

system

Sound

system

VHF

UHF

CATV

7%)

PAL4.43, NTSC3.58, NTSC4.43

D/K,I,M,B/G PAL4.43, NTSC3.58, NTSC4.43 (50/60Hz)

C1- C12 C13-C57 Z1-Z37 236

280

210mm 406 305mm

220-240V AC, 50Hz

11.5kg 23.5kg 28kg 356

375

370mm

80W 69W 100W

600

468 486mm

605

489mm

480

SERVICE MANUAL

INSTRUCTIONS FOR SERVICE SAFETY AND MAINTENANCE

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE X-RAY RADIATION

PRECAUTION , SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE

INSTRUCTION BELOW.

X-RAY RADIATION PRECAUTION

1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit X-ray radiation as result of excessive EHT voltage. The maximum EHT voltage permissible in any operating circumstances must not exceed the rated value. When checking the EHT, use the High Voltage Check procedure in this manual using an accurate EHT voltmeter.

2. The only source of X-RAY radiation in this TV is the CRT. The TV minimizes X-RAY radiation, which ensures safety during normal operation. To prevent X-ray radiation, the replacement

must be

3. Some components used in this TV have safety related characteristics preventing the CRT from emitting X-ray radiation. For continued safety, replacement component should be made after referring the PRODUCT SAFETY NOTICE below.

4. Service and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT anode. So ensure that the maximum EHT voltage does not exceed the rated value after service and adjustment.

identical to the original fitted as specified in the parts list.

CRT

SAFETY PRECAUTION

WARNING: REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.

1. The TV has a nominal working EHT voltage of 28kV. Extreme caution should be exercised when working on the TV with the back removed.

1.1 Do not attempt to service this TV if you are not conversant with the precautions and procedures for working on high voltage equipment.

1.2 When handling or working on the CRT, always discharge the anode to the TV chassis before removing the anode cap in case of electric shock.

1.3 The CRT, if broken, will violently expel glass fragments. Use shatterproof goggles and take extreme care while handling.

1.4 Do not hold the CRT by the neck as this is a very dangerous practice.

2. It is essential that to maintain the safety of the customer all power cord forms be replaced exactly as supplied from factory.

3. Voltage exists between the hot and cold ground when the TV is in operation. Install a suitable isolating transformer of beyond rated overall power when servicing or connecting any test equipment for the sake of safety.

4. When replacing ICs, use specific tools or a static-proof electric iron with small power (below 35W).

SERVICE MANUAL

5. Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to avoid electronic gun magnetized and decrement in convergence of the CRT.

6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control buttons, switch, insulating sleeve, shielding cover, isolati ng resistors and capacitors, are installed on the original place.

7. Replace blown fuses within the TV with the fuse specified in the parts list.

8. When replacing wires or components to terminals or tags, wind the leads around the terminal before soldering. When replacing safety componentsidentified by the international hazard symbols on the circuit diagram and parts list, it must be the company-approved type and must be mounted as the original.

9. Keep wires away from high temperature components.

PRODUCT SAFETY NOTICE

CAUTION: FOR YOUR PROTECTION, THE FOLLOWING PRODUCT SAFETY NOTICE

SHOULD BE READ CAREFULLY BEFORE OPERATING AND SERVICING THIS TV SET.

1. Many electrical and mechanical components in this chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection and the X-ray radiation protection afforded by them cannot necessarily be obtained by using replacements rated at higher voltages or wattage, etc. Components which have these special safety characteristics in this manual and its supplements are identified by the international hazard symbols on the circuit diagram and parts list. Before replacing any of these components read the parts list in this manual carefully. Substitute replacement components which do not have the same safety characteristics as specified in the parts list may create X-ray radiation.

2. Do not slap or beat the cabinet or CRT, since this may result in fire or explosion.

3. Never allow the TV sharing a plug or socket with other large-power equipment. Doing so may result in too large load, causing fire.

4. Do not allow anything to rest on or roll over the power cord. Protect the power cord from being walked on, modified, cut or pinched, particularly at plugs.

5. Do not place any objects, especially heavy objects and lightings, on top of the TV set. Do not install the TV near any heat sources such as radiators, heat registers, stove, or other apparatus that produce heat.

6. Service personnel should observe the SAFETY INSTRUCTIONS in this manual during use and servicing of this TV set. Otherwise, the resulted damage is not protected by the manufacturer.

Safety Symbol Description

The lightning symbol in the triangle tells you that the voltage inside this product may be strong enough to cause an electric shock. Extreme caution should be exercised when working on the TV with the back removed. This is an international hazard symbol, telling you that the components identified by the symbol have special safety-related characteristics.

This symbol tells you that the critical components identified by the FDA marking have

FDA

special safety-related characteristics.

This symbol tells you that the critical components identified by the UL marking have special safety-related characteristics.

SERVICE MANUAL

C UL

VDE

This symbol tells you that the critical components identified by the C-UL marking have been

evaluated to the UL and C-UL standards and have special safety-related characteristics.

This symbol tells you that the critical components identified by the VDE marking have

special safety-related characteristics.

MAINTENANCE

1. Place the TV set on a stable stand or base that is of adequate size and strength to prevent it from being accidentally tipped over, pushed off, or pulled off. Do not place the set near or over a radiator or heat register, or where it is exposed to direct sunlight.

2. Do not install the TV set in a place exposed to rain, water, excessive dust, mechanical vibrations or impacts.

3. Allow enough space (at least 10cm) between the TV and wall or enclosures for proper ventilation.

4. Slots and openings in the cabinet should never be blocked by clothes or other objects.

5. Please power off the TV set and disconnect it from the wall immediately if any abnormal condition are met, such as bad smell, belching smoke, sparkling, abnormal sound, no picture/sound/raster. Hold the plug firmly when disconnecting the power cord.

6. Unplug the TV set from the wall outlet before cleaning or polishing it. Use a dry soft cloth for cleaning the exterior of the TV set or CRT screen. Do not use liquid cleaners or aerosol cleaners.

SERVICE MANUAL

ADJUSTMENTS

Set-up Adjustments

The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in the following order:

1. Color purity

2. Convergence

3. White balance

Notes:

The purity/convergence magnet assembly and rubber wedges need mechanical positioning. For some picture tubes, purity/ convergence adjustments are not required.

1. Color Purity Adjustment

Preparation: Before starting this adjustment, adjust the vertical sync, horizontal sync, vertical amplitude and focus.

1.1 Face the TV set north or south.

1.2 Connect the power plug into the wall outlet and turn on the main power switch of the TV set.

1.3 Operate the TV for at least 15 minutes.

1.4 Degauss the TV set using a specific degaussing coil.

1.5 Set the brightness and contrast to maximum.

1.6 Counter clockwise rotate the R /B low brightness potentiometers to the end and rotate the green low brightness potentiometer to center.

1.7 Receive green raster pattern signals.

1.8 Loosen the clamp screw holding the deflection yoke assembly and slide it forward or backward to display a vertical green zone on the screen. Rotate and spread the tabs of the purity magnet around the neck of the CRT until the green zone is located vertically at the center of the screen.

1.9 Slowly move the deflection yoke assembly forward or backward until a uniform green screen is obtained.

1.10 Tighten the clamp screw of the assembly temporarily. Check purity of the red raster and blue raster until purities of the three rasters meet the requirement.

SERVICE MANUAL

Yok e

Fig. 1

2. Convergence Adjustment

Preparation: Before attempting any convergence adjustment, the TV should be operated for at least 15 minutes.

2.1 Center convergence adjustment

2.1.1 Receive dot pattern.

2.1.2 Adjust the brightness/contrast controls to obtain a sharp picture.

2.1.3 Adjust two tabs of the 4-pole magnet to change the angle between them and red and blue

vertical lines are superimposed each other on the center of the screen.

2.1.4 Turn both tabs at the same time keeping the angle constant to superimpose red and blue

horizontal on the center of the screen.

2.1.5 Adjust two tabs of the 6-pole magnet to superimpose red/blue line and green line.

2.1.6 Remember red and blue movement. Repeat steps 3) 5) until optimal convergence is obtained.

2.2 Circumference convergence adjustment

2.2.1 Loosen the clamp screw holding the deflection yoke assembly and allow it tilting.

2.2.2 Temporarily put the first wedge between the picture tube and deflection yoke assembly. Move

front of the deflection yoke up or down to obtain better convergence in circumference. Push the mounted wedge in to fix the yoke temporarily.

2.2.3 Put the second wedge into bottom.

2.2.4 Move front of the deflection yoke to the left or right to obtain better convergence in

circumference.

2.2.5 Fix the deflection yoke position and put the third wedge in either upper space. Fasten the

deflection yoke assembly on the picture tube.

2.2.6 Detach the temporarily mounted wedge and put it in either upper space. Fasten the deflection

SERVICE MANUAL

yoke assembly on the picture tube.

2.2.7 After fastening the three wedges, recheck overall convergence and ensure to get optimal

convergence. Tighten the lamp screw holding the deflection yoke assembly.

Fig. 2

4-pole Magnet Movement 6-pole Magnet Movement

Center Convergence by Convergence Magnets

Incline the Yoke Up (or Down) Incline the Yoke Right (or Left)

Circumference Convergence by DEF Yoke

Fig.3

3. White Balance Adjustment

Generally, white balance adjustment is made with professional equipment. It’s not practical to get

good white balance only through manual adjustment. For TVs with I

C bus control, change the bus

data to adjust white balance.

Circuit Adjustments

Preparation: Circuit adjustments should be made only after completion of set-up adjustments. Circuit adjustments can be performed using the adjustable components inside the TV set. For TVs with

C bus control, first change the bus data.

1. Degaussing

A degaussing coil is built inside the TV set. Each time the TV is powered on, the degaussing coil

SERVICE MANUAL

will automatically degauss the TV. If the TV is magnetized by external strong magnetic field, causing color spot on the screen, use a specific degausser to demagnetize the TV in the following ways. Otherwise, color distortion will be shown on the screen.

1.1 Power on the TV set and operate it for at least 15 minutes.

1.2 Receive red full-field pattern.

1.3 Power on the specific degausser and face it to the TV screen.

1.4 Turn on the degausser. Slowly move it around the screen and slowly take it away from the TV.

1.5 Repeat the above steps until the TV is degaussed completely.

2. Supply Voltage Adjustment

Caution: +B voltage has close relation to high voltage. To prevent X-ray radiation, set +B

voltage to the rated voltage.

2.1 Make sure that the supply voltage is within the range of the rated value.

2.2 Connect a digital voltmeter to the +B voltage output terminal of the TV set. Power on the TV and set the brightness and sub-brightness to minimum.

2.3 Regulate voltage adjustment components on the power PCB to make the voltmeter read 130±1V.

3. High Voltage Inspection

Caution: No high voltage adjustment components inside the chassis. Please perform high

voltage inspection in the following ways.

3.1 Connect a precise static high voltmeter to the second anode (inside the high voltage cap) of the picture tube.

3.2 Plug in the supply socket (220V, AC) and turn on the TV. Set the brightness and contrast to minimum (0

3.3 The high voltage reading should be less than the EHT limitation.

3.4 Change the brightness from minimum to maximum, and ensure high voltage not beyond the limitation in any case. Nominal EHT voltage:For MCR51R410,MCR51R420,MCR53TF30 is 28 voltage: For MCR51R410,MCR51R420,MCR53TF30 is 30.5KV.

A).

1.5KV: Limited EHT

4. Focus Adjustment

Caution: Dangerously high voltages are present inside the TV. Extreme caution should be

exercised when working on the TV with the back removed.

4.1 After removing the back cover, look for the FBT on the main PCB. There should be a FCB on the FBT.

4.2 Power on the TV and preheat it for 15 min.

4.3 Receive a normal TV signal. Rotate knob of the FCB until you get a sharp picture.

SERVICE MANUAL

BeforeAdjusting AfterAdjusting

5. Safety Inspection

5.1 Inspection for insulation and voltage-resistant Perform safety test for all naked metal of the TV. Su pply high voltage of 3000V AC, 50Hz (limit current of 10mA) between all naked metal and cold ground. Test every point for 3 sec. and ensure no arcing and sparking.

5.2 Requirements for insulation resistance Measure resistance between naked metal of the TV and feed end of the power cord to be infinity with a DC-500 high resistance meter and insulation resistance between the naked metal and degaussing coil to be over 20M

6. SERVICE mode

6.1 To enter the SER VICE mode Set the volume to 0 by the remote control. Then press and hold the MUTE button on the remote control and MENU button on the TV at the same time for over 2 seconds. In the S mode, press the POWER button to quit the S mode.

AFW:240Khz 1

( S is red and other items are yellow.)

Use the adjust it. The POS+/-, function in the S mode, but 100+, 7, 8, 9 and 0 buttons not.

/ buttons on the remote control to highlight an adjustment and the / buttons to

/ / / ,1~6, RECALL, VOL+/-, MUTE and POWER buttons on the remote control

SERVICE MANUAL

6.2 Adjustments and Bus data

Item Symbol Description Bus Data Remarks

MENU.00

V.POS /50H VERTICAL POSITION/50Hz 40 H.PHASE/50H HORIZONTAL PHASE/50Hz 11 V.SIZE/50H VERTICAL SIZE/50Hz 80 V.POS /60H VERTICAL POSITION/60Hz 40 H.PH/60H HORIZONTAL PHASE/60Hz 15 V.SIZE/60H VERTICAL SIZE/60Hz 60 V.SC VERTICAL S-CORRECTION 18 V,LINE VERTICAL LINE 19 V.SIZE CMP VERTICAL SIZE COMPENSATION 7

MENU.01

SUB.BIAS SUB-BRIGHT 63 SUB.CONT SUB-CONTRAST 63 V.KILL VERTICAL KILL 0 RF.AGC RF AGC 20 R.BIAS RED BIAS 130 G.BIAS GREEN BIAS 130 B.BIAS BLUE BIAS 130 R.DRIVE RED DRIVE 75 G.DRIVE GREEN DRIVE 15 B.DRIVE BLUE DRIVE 75

MENU.02

SECAM B DC SECAM B-Y 9 SECAM R DC SECAM R-Y 9 S/DVD B.DC S/DVD B-Y 6 S/DVD R.DC S/DVD R-Y 6 SYNC.KIL SYNC KILL 0 H.BLK.L HORIZONTAL BLANKING LEFT 4 H.BLK.R HORIZONT AL BLANKING RIGHT 4 CROS.B/W CROSSHATCH BLACK/WHITE 0 VIDEO.LVL VIDEO LEVEL 7 FM.LEVEL FM LEVEL 22

MENU.03

FM.MUTE FM MUTE 0 AUDIO.MUTE AUDIO MUIE 0 VIDEO.MUTE VIDEO MUTE 0 DEEM.TC DE-EMPHASIS TIME CONSTANT 0 SND.TRAP SOUND TRAP 0

SERVICE MANUAL

MENU.04

SUB.COLOR SUB COLOR 63 SUB.TINT SUB TINT 32 SUB.SHARP SUB SHARP 63 AUTO FLESH AUTOMATIC FLESH 0 CORING.GAN CORING GAIN 1 C.EXT EXTERNAL CHROMA 0 C.BYPASS CHROMA BAND-PASS BYPASS 0 C.KILL ON COLOR KILL ON 0

MENU.05

FIL.SYS COLOR.SYS COLOR SYSTEM 5 VOL.FIL VOLUME FILTER 0 VIF.SYS VIF SYSTEM 2 SIF.SYS.SW SIF SYSTEM SWITCH 0 * VIDEO.SW VIDEO SWITCH 1

MENU.06

R/B G.BAL R-Y/B-Y GAIN BALANCE 15 R/B ANGLE R-Y/B-Y ANGLE 15 CD. MODE VERTICAL COUNTDOWN MODE 0 GREY MODE GREY MODE V.SETUP VERTICAL SETUP 0

MENU.07

BLANK.DEF BLANK.DEFEAT 0 BRT.ABL.TH BRIGHT ABL THRESHOLD 1 RGB TEMP RGB TEMPERATURE CHARACTERISTICS 1 BRT.ABL.DF BRIGHT ABL DEFEAT 1 MID.STP.DF BRIGHT MID STOP DEFEAT 1 FBP.BLK.SW FBP.BLANKING OR.SWITCH 0

MENU.08

DIGIT AL.OSD DIGITAL OSD MODE 0 OSD.CONT OSD CONTRAST CONTROL? 40 OSD.CONTST OSD CONTRAST CONTROL? 0 OSD. H.POS OSD HORIZONTAL POSITION 22

MENU.09

H.FREQ HORIZONTAL FREQUENCY 46 FM.GAIN FM GAIN 0 C.KILL.OFF COLOR KILL OFF 0 AUDEO.SW AUDEO SWITCH 0 T.DISBLE TEST MODE SWITCH DISABLE 1

MENU.10

FILTER SYSTEM

SELECT Y/C FIL TER MODE

SERVICE MANUAL

G/Y ANGLE G-Y ANGLE 0 COL KIL OP COLOR KILLER OPERATIONAL POINT 5 CBCR-IN YCbCr INPUT or SECAM INPUT 1 Y-APF YCbCr ALL PASS FILTER SELECT 0 PRE SHOOT PRE-SHOOT SELECT 0 WPL OPE WHITE PEAK LIMITER OPERATING POINT 0 DC REST DC RESTORATION SELECT 0 BK STR STA BLACK STRETCH START 3 BK STR GAN BLACK STRETCH GAIN 2

MENU.11

OVER MD SW OVER MD SW? 0 Y GAMMA Y GAMMA 0 FSC C.SYNC FSC C.SYNC? 1 VBLK SW V BLANKING CONTROL SW 0 SND TRAP SOUND TRAP CONTROL 1 HALF TONE HALF TONE LEVEL 3 HALF T SW HALF TONE ON/OFF SW 1 TST VRESET TST VRESET? 0

MENU.12

E/W DC E/W DC 32 E/W AMP E/W AMP 32 E/W TILP E/W TILP 32 E/W C TOP E/W C TOP 5 E/W C BOTM E/W C BOTM 5

MENU.13 MENU.13

E/W TEST E/W TEST 7 HSIZE COMP HORIZONTAL SIZE COMPENSATION 7 IF TEST 3B IF TEST 3B 0 V.LEV ADJ VIDEO.LEVEL ADJUSTMENT 0 OV MOD LEV OV MOD LEV 5 PRE/OVER PRE/OVER SHOOT 0 C.VCO SW CHROMA.VCO SWITCH 0 C.VCO ADJ CHROMA VCO ADJUSTMENT 3

MENU.14 MENU.14

VNSYNC VNSYNC 0 TINT.THROU TINT.THROU 0 HLOCK.VDET HLOCK.VDET 1

MENU.15 MENU.15

OPT.1CHIP OPT.1CHIP 0

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