Memorex INSTRUCTION MANUAL User manual

Brand: Memorex

Model: INSTRUCTION MANUAL

Category: CRT TVs

Type: User manual

SERVICE MANUAL

COLOR TELEVISION RECEIVER

ORIGINAL

MFR’S VERSION B

MT2271 (SERIES A)

Design and specifications are subject to change without notice.

6. AVOID AN X-RAY1. KEEP THE NOTICES

5. TAKE CARE TO DEAL WITH THE

CATHODE-RAY TUBE

In the condition that an explosion-proof cathode-

ray tube is set in this equipment, safety is

secured against implosion. However, when

removing it or serving from backward, it is

dangerous to give a shock. Take enough care to

deal with it.

Safety is secured against an X-ray by consider-

ing about the cathode-ray tube and the high

voltage peripheral circuit, etc.

Therefore, when repairing the high voltage pe-

ripheral circuit, use the designated parts and

make sure not modify the circuit.

Repairing except indicates causes rising of high

voltage, and it emits an X-ray from the cathode-

ray tube.

Please include the following informations when you order parts. (Particularly the VERSION LETTER.)

1. MODEL NUMBER and VERSION LETTER

The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be

found at the end of the SERIAL NUMBER.

2. PART NO. and DESCRIPTION

You can find it in your SERVICE MANUAL.

Inferior silicon grease can damage IC's and transistors.

When replacing an IC's or transistors, use only specified silicon grease (YG6260M).

Remove all old silicon before applying new silicon.

IMPORTANT

HOW TO ORDER PARTS

SERVICING NOTICES ON CHECKING

As for the places which need special attentions,

they are indicated with the labels or seals on the

cabinet, chassis and parts. Make sure to keep the

indications and notices in the operation manual.

2. AVOID AN ELECTRIC SHOCK

There is a high voltage part inside. Avoid an

electric shock while the electric current is

flowing.

3. USE THE DESIGNATED PARTS

The parts in this equipment have the specific

characters of incombustibility and withstand

voltage for safety. Therefore, the part which is

replaced should be used the part which has

the same character.

Especially as to the important parts for safety

which is indicated in the circuit diagram or the

table of parts as a mark, the designated

parts must be used.

PUT PARTS AND WIRES IN THE

ORIGINAL POSITION AFTER

ASSEMBLING OR WIRING

There are parts which use the insulation

material such as a tube or tape for safety, or

which are assembled in the condition that

these do not contact with the printed board.

The inside wiring is designed not to get closer

to the pyrogenic parts and high voltage parts.

Therefore, put these parts in the original

positions.

7. PERFORM A SAFETY CHECK AFTER

SERVICING

Confirm that the screws, parts and wiring which

were removed in order to service are put in the

original positions, or whether there are the

portions which are deteriorated around the

serviced places serviced or not. Check the

insulation between the antenna terminal or

external metal and the AC cord plug blades.

And be sure the safety of that.

(INSULATION CHECK PROCEDURE)

Unplug the plug from the AC outlet.

Remove the antenna terminal on TV and turn

on the TV.

Insulation resistance between the cord plug

terminals and the eternal exposure metal

[Note 2] should be more than 1M ohm by

using the 500V insulation resistance meter

[Note 1].

If the insulation resistance is less than 1M

ohm, the inspection repair should be

required.

[Note 1]

If you have not the 500V insulation

resistance meter, use a Tester.

[Note 2]

External exposure metal: Antenna terminal

A1-1

CONTENTS

SERVICING NOTICES ON CHECKING......................................................................................................

HOW TO ORDER PARTS ...........................................................................................................................

IMPORTANT................................................................................................................................................

CONTENTS .................................................................................................................................................

GENERAL SPECIFICATIONS ....................................................................................................................

DISASSEMBLY INSTRUCTIONS

1. REMOVAL OF ANODE CAP ..............................................................................................................

2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ................................................................

SERVICE MODE LIST.................................................................................................................................

CONFIRMATION OF USING HOURS.........................................................................................................

NOTE FOR THE REPLACING OF MEMORY IC ........................................................................................

ELECTRICAL ADJUSTMENTS ..................................................................................................................

MAJOR COMPONENTS LOCATION GUIDE .............................................................................................

BLOCK DIAGRAM ......................................................................................................................................

PRINTED CIRCUIT BOARDS

MAIN/CRT/AV....................................................................................................................................

MAIN/CRT..........................................................................................................................................

SCHEMATIC DIAGRAMS

MICON/TUNER..................................................................................................................................

CHROMA ...........................................................................................................................................

DEFLECTION/CRT ............................................................................................................................

POWER .............................................................................................................................................

SOUND ..............................................................................................................................................

JACK/SOUND....................................................................................................................................

WAVEFORMS .............................................................................................................................................

MECHANICAL EXPLODED VIEW ..............................................................................................................

MECHANICAL REPLACEMENT PARTS LIST ..........................................................................................

ELECTRICAL REPLACEMENT PARTS LIST ............................................................................................

A2-1

A1-1

A2-1

A3-1~A3-4

B1-1

B2-1, B2-2

C-1

D1-1~D2-1

D3-1

E-1, E-2

F-1, F-2

F-3, F-4

G-1, G-2

G-3, G-4

G-5, G-6

G-7, G-8

G-9, G-10

G-11, G-12

H-1~H-3

I-1

J1-1

J2-1, J2-2

GENERAL SPECIFICATIONS

G-1 TV CRT CRT Size / Visual Size 27 inch / 675.1mmV

System CRT Type Normal

Deflection 111 degree

Magnetic Field BV/BH +0.45G/0.18G

Color System NTSC

Speaker 2Speaker

Position Front

Size 1.5 x 2.7 Inch

Impedance 8 ohm

Sound Output MAX 2.5 + 2.5 W

10%(Typical) 2.0 + 2.0 W

NTSC3.58+4.43 /PAL60Hz No

G-2 Tuning Broadcasting System US System M

System Tuner and System 1Tuner

Receive CH Destination Ohers

Tuning System F-Synth

Input Impedance VHF/UHF 75 ohm

2 - 69, 4A, A-5 - A-1,

CH Coverage A - I, J - W, W+1 - W+84

Intermediate Picture(FP) 45.75MHz

Frequency Sound(FS) 41.25MHz

FP-FS 4.50MHz

Preset CH No

Stereo/Dual TV Sound Yes

Tuner Sound Muting Yes

G-3 Power Power Source AC 120V AC 60Hz

Power Consumption at AC 115 W at AC 120 V 60 Hz

Stand by (at AC) 8 W at AC 120 V 60 Hz

Per Year -- kWh/Year

Protector Power Fuse Yes

G-4 Regulation Safety UL /CSA

Radiation FCC /DOC

X-Radiation DHHS/HWC

G-5 Temperature Operation +5oC ~ +40oC

Storage -20oC ~ +60oC

G-6 Operating Humidity Less then 80% RH

G-7 On Screen Menu Yes

Display Menu Type Character

Picture Yes

Contrast Yes

Brightness Yes

Color Yes

Tint Yes

Sharpness Yes

Audio Yes

Bass Yes

Treble Yes

Balance Yes

BBE On/Off No

Stable Sound On/Off No

CH Set Up Yes

TV/CATV Yes

CH Program Yes

Add/Erase Yes

Language Yes

V-chip Yes

CH Label No

Favorite CH No

Color Stream DVD/DTV No

Control Level Yes

Volume Yes

Brightness Yes

Contrast Yes

Color Yes

Tint (NTSC Only) Yes

Sharpness Yes

Tuning No

Bass Yes

Treble Yes

Balance Yes

Back Light No

Stereo,Audio Output,SAP Yes

Video Yes

Color Stream No

Channel(TV/Cable) Yes

A3-1

GENERAL SPECIFICATIONS

CH Label No

Sleep Timer Yes

Sound Mute Yes

V-chip Rating Yes

G-8 OSD Language English French Spanish

OSD Language Setting English

G-9 Clock and Sleep Timer Max Time 120 Min

Timer Step 10 Min

On/Off Timer Program(On Tim / Off Tim) No

Wake Up Timer No

Timer Back-up (at Power Off Mode) more than -- Min Sec

G-10 Remote Unit RC-DW

Control Glow in Dark Remocon No

Format NEC

Custom Code 86-05 h

Power Source Voltage(D.C) 3V

UM size x pcs UM-4 x 2 pcs

Total Keys 28 Keys

Keys Power Yes

1 Yes

2 Yes

3 Yes

4 Yes

5 Yes

6 Yes

7 Yes

8 Yes

9 Yes

0 Yes

100 No

CH Up Yes

CH Down Yes

Volume Up Yes

Volume Down Yes

TV/Caption/Text Yes

CH1/CH2 Yes

TV/Video(TV/AV) Yes

CH RTN/CH ENT(Quick View) Yes

Sleep Yes

RE Call(Call) Yes

Reset Yes

Menu Yes

Enter Yes

Mute Yes

Exit No

MTS(Audio Select) Yes

Set + Yes

Set - Yes

Multi Brand Keys CH Up(VCR) No

CH Down(VCR) No

Pause/Still No

TV/VCR(VCR) No

Code No

CH Enter No

MBR Set No

FF No

Rew No

Rec No

Play No

Stop No

TV No

VCR No

Cable No

G-11 Features Auto Degauss Yes

Auto Shut Off Yes

Canal+ No

CATV Yes

Anti-theft No

Rental No

Memory(Last CH) Yes

Memory(Last Volume) Yes

V-Chip Yes

Type USA,ORION Type

BBE No

Auto Search No

CH Allocation No

SAP Yes

A3-2

GENERAL SPECIFICATIONS

Channel Lock No

Just Clock Function No

Game Position No

CH Label No

VM Circuit No

Full OSD No

Premiere No

Comb Filter No

Lines

Auto CH Memory Yes

Hotel Lock No

Closed Caption Yes

Stable Sound No

Favorite CH No

G-12 Accessories Owner's Manual Language English/FRENCH

w/Guarantee Card Yes

Remote Control Unit Yes

Rod Antenna No

Poles

Terminal

Loop Antenna No

Terminal

U/V Mixer No

DC Car Cord (Center+) No

Guarantee Card No

Warning Sheet No

Circuit Diagram No

Antenna Change Plug No

Service Facility List No

Important Safeguard No

Dew/AHC Caution Sheet No

AC Plug Adapter No

Quick Set-up Sheet No

Battery No

UM size x pcs

OEM Brand No

AC Cord No

AV Cord (2Pin-1Pin) No

Registration Card No

PTB Sheet No

300 ohm to 75 ohm Antenna Adapter No

G-13 Interface Switch Front Power Yes

System Select No

Main Power SW No

Sub Power No

Channel Up/Reset Yes

Channel Down/Enter Yes

Volume Up/Set Up Yes

Volume Down/Set Down Yes

Menu: Vol Up + Vol Down Yes

Rear AC/DC No

TV/CATV Selector No

Degauss No

Main Power SW No

Indicator Power No

Stand-by No

On Timer No

Terminals Front Video Input RCA

Audio Input RCA x 2

Other Terminal No

Rear Video Input(Rear1) RCA

Video Input(Rear2) No

Audio Input(Rear1) RCA x 2

Audio Input(Rear2) No

Video Output RCA

Audio Output RCA x 2

Euro Scart No

Color Stream No

Diversity No

Ext Speaker No

DC Jack 12V(Center +) No

VHF/UHF Antenna Input F Type

AC Outlet No

G-14 Set Size Approx. W x D x H (mm) 650 x 478 x 560

G-15 Weight Net (Approx.) 35kg ( 77.6 lbs)

Gross (Approx.) 38Kg ( 84.3 lbs)

G-16 Carton Master Carton No

A3-3

GENERAL SPECIFICATIONS

Content ---- Sets

Material -- /--

Dimensions W x D x H(mm) -- x -- x --

Description of Origin No

Gift Box Yes

Material Double/WHITE CORRUGATED CARTON

Dimensions W x D x H(mm) 718 x 558 x 655

Design As per Buyer's

Description of Origin Yes

Drop Test Natural Dropping At 1 Corner / 3 Edges / 6

Surfaces

Height (cm) 31

Container Stuffing 198 Sets/40' container

G-17 Cabinet Material Cabinet Front PS 94V0 DECABROM

Cabinet Rear PS 94V0

A3-4

1. REMOVAL OF ANODE CAP

Read the following NOTED items before starting work.

After turning the power off there might still be a potential

voltage that is very dangerous. When removing the

Anode Cap, make sure to discharge the Anode Cap's

potential voltage.

Do not use pliers to loosen or tighten the Anode Cap

terminal, this may cause the spring to be damaged.

REMOVAL

1.Follow the steps as follows to discharge the Anode Cap.

(Refer to Fig. 1-1.)

Connect one end of an Alligator Clip to the metal part of a

flat-blade screwdriver and the other end to ground.

While holding the plastic part of the insulated Screwdriver,

touch the support of the Anode with the tip of the

Screwdriver.

A cracking noise will be heard as the voltage is discharged.

Flip up the sides of the Rubber Cap in the direction of the

arrow and remove one side of the support.

(Refer to Fig. 1-2.)

DISASSEMBLY INSTRUCTIONS

GND on the CRT

Screwdriver

Alligator Clip

Support CRT

GND on the CRT

Rubber Cap

CRT Support

Fig. 1-1

Fig. 1-2

3.After one side is removed, pull in the opposite direction to

remove the other.

NOTE

Take care not to damage the Rubber Cap.

INSTALLATION

1.Clean the spot where the cap was located with a small

amount of alcohol. (Refer to Fig. 1-3.)

NOTE

Confirm that there is no dirt, dust, etc. at the spot where

the cap was located.

Arrange the wire of the Anode Cap and make sure the

wire is not twisted.

Turn over the Rubber Cap. (Refer to Fig. 1-4.)

Location of Anode Cap

Fig. 1-3

Fig. 1-4

B1-1

4.Insert one end of the Anode Support into the anode button,

then the other as shown in Fig. 1-5.

6. Confirm that the Support is securely connected.

Put on the Rubber Cap without moving any parts.

CRT Support Fig. 1-5

Masking Tape

(Cotton Tape)

DISASSEMBLY INSTRUCTIONS

REMOVAL

Put the Masking Tape (cotton tape) around the Flat

Package IC to protect other parts from any damage.

(Refer to Fig. 2-1.)

Fig. 2-1

NOTE

REMOVAL AND INSTALLATION OF

FLAT PACKAGE IC

Some ICs on the PCB are affixed with glue, so be

careful not to break or damage the foil of each IC

leads or solder lands under the IC when removing it.

NOTE

Masking is carried out on all the parts located within

10 mm distance from IC leads.

Blower type IC

desoldering machine

Heat the IC leads using a blower type IC desoldering

machine. (Refer to Fig. 2-2.)

Fig. 2-2

NOTE

Do not add the rotating and the back and forth

directions force on the IC, until IC can move back and

forth easily after desoldering the IC leads completely.

When IC starts moving back and forth easily after

desoldering completely, pickup the corner of the IC using

a tweezers and remove the IC by moving with the IC

desoldering machine. (Refer to Fig. 2-3.)

Blower type IC

desoldering

machine

IC Fig. 2-3

Tweezers

Peel off the Masking Tape.4.

Absorb the solder left on the pattern using the Braided

Shield Wire. (Refer to Fig. 2-4.)

NOTE

Do not move the Braided Shield Wire in the vertical

direction towards the IC pattern.

Braided Shield Wire

Soldering Iron

Fig. 2-4

IC pattern

B2-1

DISASSEMBLY INSTRUCTIONS

Supply soldering

from upper position

to lower position

Supply the solder from the upper position of IC leads

sliding to the lower position of the IC leads.

(Refer to Fig. 2-6.)

Fig. 2-6

Soldering IronSolder

Absorb the solder left on the lead using the Braided

Shield Wire. (Refer to Fig. 2-7.)

Fig. 2-7

Soldering Iron

Braided Shield Wire

NOTE

Do not absorb the solder to excess.

When bridge-soldering between terminals and/or the

soldering amount are not enough, resolder using a Thin-

tip Soldering Iron. (Refer to Fig. 2-8.)

Fig. 2-8

Thin-tip Soldering Iron

NOTE

When the IC leads are bent during soldering and/or

repairing, do not repair the bending of leads. If the

bending of leads are repaired, the pattern may be

damaged. So, be always sure to replace the IC in this

case.

Finally, confirm the soldering status on four sides of the

IC using a magnifying glass.

Confirm that no abnormality is found on the soldering

position and installation position of the parts around the

IC. If some abnormality is found, correct by resoldering.

Solder temporarily

Soldering Iron

INSTALLATION

Take care of the polarity of new IC and then install the

new IC fitting on the printed circuit pattern. Then solder

each lead on the diagonal positions of IC temporarily.

(Refer to Fig. 2-5.)

Fig. 2-5

Solder temporarily

B2-2

SERVICE MODE LIST

This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.

To enter the Service Mode, press both set key and remote control key for more than 1 second.

Set Key Remocon Key Operations

VOL. (-) MIN 0Releasing of V-CHIP PASSWORD.

VOL. (-) MIN 1

VOL. (-) MIN 6

Initialization of the factory.

NOTE: Do not use this for the normal servicing.

POWER ON total hours is displayed on the screen.

Refer to the "CONFIRMATION OF USING HOURS".

Can be checked of the INITIAL DATA of MEMORY IC.

Refer to the "NOTE FOR THE REPLACING OF MEMORY IC".

VOL. (-) MIN 8 Writing of EEPROM initial data.

NOTE: Do not use this for the normal servicing.

VOL. (-) MIN Display of the Adjustment MENU on the screen.

Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).

C-1

CONFIRMATION OF USING HOURS

POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.

Set the VOLUME to minimum.

Press both VOL. DOWN button on the set and Channel

button (6) on the remote control for more than 1 second.

After the confirmation of using hours, turn off the power.

INIT 00 83

0010

CRT ON

ADDRESS DATA

FIG. 1

Initial setting content of MEMORY IC.

POWER ON total hours.

= (16 x 16 x 16 x thousands digit value)

+ (16 x 16 x hundreds digit value)

+ (16 x tens digit value)

+ (ones digit value)

NOTE FOR THE REPLACING OF MEMORY IC

If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to

ensure correct data settings while making reference to TABLE 1.

Table 1

88 5A A2 39 02 63 24 3B A3 20

The unit will now have the correct DATA for the new MEMORY IC.

Enter DATA SET mode by setting VOLUME to minimum.

Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 1 second.

ADDRESS and DATA should appear as FIG 1.

ADDRESS is now selected and should "blink". Using the SET + or - keys on the remote, step through the ADDRESS until

required ADDRESS to be changed is reached.

Press ENTER to select DATA. When DATA is selected, it will "blink".

Again, step through the DATA using SET + or - until required DATA value has been selected.

Pressing ENTER will take you back to ADDRESS for further selection if necessary.

Repeat steps 3 to 6 until all data has been checked.

When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.

INI

+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A

ELECTRICAL ADJUSTMENTS

1.BEFORE MAKING ELECTRICAL

ADJUSTMENTS

Read and perform these adjustments when repairing the

circuits or replacing electrical parts or PCB assemblies.

CAUTION

•

Use an isolation transformer when performing any

service on this chassis.

Before removing the anode cap, discharge electricity

because it contains high voltage.

When removing a PCB or related component, after

unfastening or changing a wire, be sure to put the wire

back in its original position.

Inferior silicon grease can damage IC's and transistors.

When replacing IC's and transistors, use only specified

silicon grease (YG6260M).

Remove all old silicon before applying new silicon.

1. Synchro Scope

2. Digital Voltmeter

Prepare the following measurement tools for electrical

adjustments.

2. BASIC ADJUSTMENTS

2-1: RF AGC DELAY

Receive an 60dB monoscope pattern.

Connect the digital voltmeter to TP001 (R606).

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (02) on the remote control to

select "RF AGC DELAY".

Press the VOL. UP/DOWN button on the remote control

until the digital voltmeter is 2.65 ± 0.05V.

D1-1

On-Screen Display Adjustment

In the condition of NO indication on the screen.

Press the VOL. DOWN button on the set and the

Channel button (9) on the remote control for more than

1 second to appear the adjustment mode on the screen

as shown in Fig. 1-1.

Fig. 1-1

Use the Channel UP/DOWN button or Channel button

(0-9) on the remote control to select the options shown

in Fig. 1-2.

Press the MENU button on the remote control to end

the adjustments.

FUNCTION

OSD H

CUT OFF

RF AGC DELAY

VIF VCO

H VCO

H PHASE

V SIZE

V SHIFT

R DRIVE

B DRIVE

R BIAS

G BIAS

B BIAS

NO.

12 Fig. 1-2

FUNCTION

BRIGHTNESS

CONTRAST

COLOR

TINT

SHARPNESS

FM LEVEL

LEVEL

SEPARATION 1

SEPARATION 2

TEST MONO

TEST STEREO

X-RAY TEST

NO.

00 OSD 15

Adjust the unit to the following settings.

R.DRIVE=73, B.DRIVE=61, R.BIAS=88, G.BIAS=74,

B.BIAS=73, BRIGHTNESS=124, CONTRAST=100

Place the set with Aging Test for more than 15 minutes.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (01) on the remote control to

select "CUT OFF".

Adjust the Screen Volume until a dim raster is obtained.

2-2: CUT OFF

2-3: FOCUS

Receive the monoscope pattern.

Turn the Focus Volume fully counterclockwise once.

Adjust the Focus Volume until picture is distinct.

2-4: WHITE BALANCE

NOTE:Adjust after performing CUT OFF adjustment.

Place the set with Aging Test for more than 10 minutes.

Receive the color bar pattern.

Using the remote control, set the brightness and contrast

to normal position.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (10) on the remote control to

select "R.BIAS".

Using the VOL. UP/DOWN button on the remote control,

adjust the R.BIAS.

Press the CH. UP/DOWN button on the remote control to

select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS".

Using the VOL. UP/DOWN button on the remote control,

adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS.

Perform the above adjustments 6 and 7 until the white

color is looked like a white.

2-5: SUB TINT/SUB COLOR

Receive the color bar pattern. (RF Input)

Connect the oscilloscope to TP023.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (16) on the remote control to

select "TINT".

Press the VOL. UP/DOWN button on the remote control

until the section "A" becomes as straight line.

(Refer to Fig. 2-1)

Connect the oscilloscope to TP022.

Press the CH DOWN button once to set to "COLOR" mode.

Press the VOL. UP/DOWN button on the remote control

until the red color level is adjusted to 110% of the white

level. (Refer to Fig. 2-2)

Receive the color bar pattern. (Audio Video Input)

Press the TV/AV button on the remote control to set to

the AV mode. Then perform the above adjustments 2~7.

D1-2

Fig. 2-1

110%

100%

Fig. 2-2

2-9: OSD HORIZONTAL

2. Activate the adjustment mode display of Fig. 1-1.

Press the VOL. UP/DOWN button on the remote control

until the difference of A and B becomes minimum.

(Refer to Fig. 2-3)

00 OSD 15

Fig. 2-3

2-10: VERTICAL VCO

Place the set with Aging Test for more than 15 minutes.

Receive an 80dB monoscope pattern.

Connect the digital voltmeter to pin 5 of CP601.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (03) on the remote control to

select "VIF VCO".

Press the VOL. UP/DOWN button on the remote control

until the digital voltmeter is 2.5V.

2-11: CONTAST VOLTAGE

Using the remote control, set the brightness and contrast

to normal position.

Connect the digital voltmeter to TP402.

Set condition is AV MODE without signal.

Adjust the VR502 until the digital voltmeter is 130 ± 1V.

2-12: SEPARATION 1, 2

Receive the stereo broadcasting signal.

Connect the AC voltmeter to CP351 through stereo filter

(L=400Hz, R=2KHz).

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (20) on the remote control to

select "SEPARATION 1".

Press the VOL. UP/DOWN button on the remote control

unit the output of L-CH and R-CH becomes minimum.

Press the CH UP button once to set to "SEPARATION 2"

mode.

Press the VOL. UP/DOWN button on the remote control

unit the output of L-CH and R-CH becomes minimum.

2-6: HORIZONTAL PHASE

Receive the center cross signal from the Pattern

Generator.

Using the remote control, set the brightness and

contrast to normal position.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (05) on the remote control to

select "H.PHASE".

Press the VOL. UP/DOWN button on the remote

control until the SHIFT quantity of the OVER SCAN on

right and left becomes minimum.

2-7: VERTICAL SIZE

NOTE: Adjust after performing adjustments in section 2-6

2-8: VERTICAL SHIFT

Receive the center cross signal from the Pattern

Generator.

Using the remote control, set the brightness and

contrast to normal position.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (06) on the remote control to

select "V.SIZE".

Press the VOL. UP/DOWN button on the remote

control until the rectangle on the center of the screen

becomes square.

Receive a broadcast and check if the picture is normal.

NOTE: Adjust after performing adjustments in section 2-7

Receive the center cross signal from the Pattern

Generator.

Using the remote control, set the brightness and

contrast to normal position.

Activate the adjustment mode display of Fig. 1-1 and

press the channel button (07) on the remote control to

select "V.SHIFT".

Press the VOL. UP/DOWN button on the remote

control until the horizontal line becomes fit to the notch

of the shabow mask.

"A"

ELECTRICAL ADJUSTMENTS

3-2: PURITY

NOTE

Adjust after performing adjustments in section 3-1.

Receive the green raster pattern from color bar

generator.

Adjust the pair of purity magnets to center the

color on the screen.

Adjust the pair of purity magnets so the color at the

ends are equally wide.

Move the deflection yoke backward (to neck side)

slowly, and stop it at the position when the whole

screen is green.

Confirm red and blue colors.

Adjust the slant of the deflection yoke while watching the

screen, then tighten the fixing screw.

DEFLECTION YOKE

DEFLECTION YOKE SCREW

MAGNET SCREW

PURITY MAGNETS

6 POLE MAGNETS

4 POLE MAGNETS

Fig. 3-1

PURITY AND CONVERGENCE

ADJUSTMENTS

NOTE

3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)

Tighten the screw for the magnet. Refer to the adjusted

CRT for the position. (Refer to Fig. 3-1)

If the deflection yoke and magnet are in one body,

untighten the screw for the body.

Receive the green raster pattern from the color bar

generator.

Slide the deflection yoke until it touches the funnel

side of the CRT.

Adjust center of screen to green, with red and blue on the

sides, using the pair of purity magnets.

Switch the color bar generator from the green raster

pattern to the crosshatch pattern.

Combine red and blue of the 3 color crosshatch pattern

on the center of the screen by adjusting the pair of

4 pole magnets.

Combine red/blue (magenta) and green by adjusting the

pair of 6 pole magnets.

Adjust the crosshatch pattern to change to white

by repeating steps 6 and 7.

Turn the unit on and let it warm up for at least 30

minutes before performing the following adjustments.

Place the CRT surface facing east or west to reduce the

terrestrial magnetism.

Turn ON the unit and demagnetize with a Degauss Coil.

Adjust after performing adjustments in section 3-2.

3-3: STATIC CONVERGENCE

3-4: DYNAMIC CONVERGENCE

NOTE

Adjust after performing adjustments in section 3-3.

Adjust the differences around the screen by moving

the deflection yoke upward/downward and right/left.

(Refer to Fig. 3-2-a)

Insert three wedges between the deflection yoke and

CRT funnel to fix the deflection yoke.

(Refer to Fig. 3-2-b)

R G B

Fig. 3-2-a

WEDGE WEDGE

WEDGE

WEDGE POSITION

Fig. 3-2-b

R G B

Receive the crosshatch pattern from the color bar

generator.

Combine red and blue of the 3 color crosshatch pattern

on the center of the screen by adjusting the pair of

4 pole magnets.

Combine red/blue (magenta) and green by adjusting the

pair of 6 pole magnets.

D2-1

UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT

MAJOR COMPONENTS LOCATION GUIDE

TU001

FOCUS VOLUME

SCREEN VOLUME

FB401

D3-1

CP601

CRT PCB

J801

TP023

MAIN PCB

TP022

J701

VR502

TP402

R606

CP351

REMOCON

CF601

SAW FILTER

AGCIF

TU001

11 1

CHROMA IC

IC601 M61206FP

PUMP UP

AMP

V-OUT IC

IC401

LA78041

IC351 LA4600

Q801

RED OUT

Q803

GREEN OUT

Q802

BLUE OUT

CRT

V801

11 6 8

RGB

Heater F7

42R

CVIN

MICON IC

IC101 OEC7044C

FB401

FBT

DY801

H. SYNC

V. SYNC

Q403

AUDIO MUTE

SOUND

AMP IC

X-RAY_TEST

Q706

BUFFER

10 OS101 1

MUTE SW

Q351

X-RAY SW

Q101

AT+5V

E-2

POWER

VOL UP

KEY2

CH UP

VOL DOWN

CH DOWN

KEY1

SOUND DECORDER IC

IC852 AN5829S

18 19 910

TONE CONTROL IC

IC854 M62420SP

AC IN

D501~D504

RECTIFIER

F501

T501

IC506

LTV-817M-VB

FEED BACK

Q507

FEED BACK

SW.

VR502

+B ADJ.

L503

DEGAUSS COIL

RY501

RELAY

TH501

SW REG. IC

IC501

STR-G6624

Q504

RELAY DRIVE

22 21 24 2

3219

FRONT_A/V_IN

J702

REAR_A/V_IN

J701

VIDEO AMP IC

IC702

NJM2234L

531

Q851

BUFFER

SPEAKER

SP351

MEMORY IC

IC199

S-24C02BDP-1A

SCL 1

SDA 1

MUTE

MUTE SW

Q705

Q701

Q702

BLOCK DIAGRAM

1VCC

Q402

H. DRIVE

Q401

H. OUTPUT

Q608

SWITCHING

SCL

SDA

MUTE

Q707

MUTE SW

BUFFER

Q852

X-RAY

POWER

37 AV1

38 AV2

3EXT MUTE

9V REG. IC

IC853 KIA78L09BP-AT

+12V

50 AUDIO OUT

VIF IN

G IN

B IN

R IN

RF AGC OUT

VIF VIDEO OUT

POWER ON CONT

H OUT

VIF Vcc

VIF IN

Xin

Xout X101

EFOEC8004T4

SCL

10 SDA

INV FBP OUT

V PULSE OUT

17 V OUT

FPB IN

DEGAUSS_H

AT+10V

TUNER+5V

STEREO+5V

5V REG

Q605

5V REG

Q601 5V REG

Q604

+12V

X602

3.579545MHz

TV/Y IN

8.7V REG OUT

X' TAL

VIDEO/CHROMA GND.

5.7V REG OUT(FOR CPU)

Y SW OUT

B OUT

R OUT

G OUT

Q606

REG

5V REG

Q603

AT+5V

AT+10V

CHROMA+8V

E-1

X-RAY

TEST SW.

TU001

D605

C003

D001

CP351

W103

C440

T401

C443_2

R427

C437

W141

D405

C430_1

L406

D411

R422

R401

R405

R408

R418

R417

R407

CP401_1

R446

C439

Q402

W142

R421

R409

R445

C405

C435_2

C416

D410

D408

D404

D407

C404

D401

D402

VR502

Q504

D516

R514

Q507

D528

R554

D505

D509

B504

C560

C521

D510_1

C518

J701

W133

W136

IC702

W058

C444

W897

C517

Q401

J702

W043

L401

C726

C728

C360

W828

W841

W839

IC351

C717

W042

R419

R360

R363

R434

SW105 SW104 SW103 SW102 SW101

OS101

W098

IC199

W117

L101

W118

C122

X101

W083

C604

C632

Q605

C622

Q604

Q603

W030

C605

CF604

CF603

L607

C606

L606

C625

X602

L601

CF601

C603

W018

W079

W027

Q601

IC854

W123

W084

W016

W015

R631

W115

W013

R623

C875

C869 C871

C876

W029

C853

C703

IC401

C854

C855

C861

C860

W028

W047

W021

W038

W110

W059

W099

W070

C702

W090

C706

W044

R702

C530

W121

L501

FH502

F501

FH501

RY501

CP502

D517

R505

D504

D511

W137

D513

C532

R501

R542

W138

B502

D515

R503

IC501

W139

R506

D518

IC506

W111

C647

D602

D601

C401

CP701A

C355

C356

R449

R428

W108

C448_1

W020

W019

CC001

W052

D514

W124

W127

W026

R515

R523

R424

C620

W032

IC853

W140

W113

C418

CP701B

R402

TH501_1

C402

C514

R502

D506

T501

W087 W086

D521

Q606

W031

W072

W036

W128

W012

W119

D606

D609

D608

W011

R543

W105

CP601

C433

W120

W122

L608

W014

W109

R440

C652

W066

FB401

TP402

C704

C701

D502

D503

D512

D501

W033

W035

W045W046

C115

R625

W010

R648

W102

R641

D604

D607

D611

W080

Q608

CP802A

W114

W037

W039

W041

W829

W129

W082

W085

C507_1

Q351

W064

Q706

W116

Q403

W076

W075

R431

R001

W891

W107

W131

W134

W069

R632

W091

W096

W073

Q101

R420

C427

C718

D403

R002

TP601

Q852

Q851

W050

R760

W049

Q702

Q701

Q705

Q707

W051

W068

W078

W077

W074

W022

W025

TP024 TP022

R802

R804

R803

R806

TP023

R807

CP805

C802

W004

CP802B CC002

Q803 Q802 Q801

W005

CP801

W003

W002

J801

CP806

R805

C124

R435

W062

C705

C872_1

C870

C873_1

C885

C635_1

C640_1

C601

C531_1

W125

R354

R517

W071

C352

W088

C417

W081

C624

W056

W055

W801

W802

W092

HS351

W805

R500

R429

W132

PH004

PH003

W101 R436

HS401

HS501

W065

W067

W060

W061

W048

W054

C645_2

W034

W143

C002

R606

C118

C414

C434

C510

C712

C721

D413

C882_1

C883_1

C881

C866_1

C864_1

C867_1

C868_1

R870

R118

C884

R863

C862

R613

W146

W809

W150

C446

C612

W151

W152

W144

C004

C503_1

C502_1

C501_1

R359

C857_2

C865_2

W023

C357_1

W827

W864

W863

W862

W817

W804

W848

W810

W844

W830

W812

W820

W842

W811

R653_1

C506_2

C505_2

S807X

S807Y

C709

C638_2

R604

C613_1

W857

C516

W825

C659_2

C628

R410

R432

S805Y

S805X

C358_1

C353_1

D610

VR401

R412

R433

R411 R438

S501B

S501A

6.3A125VOR250V

_A_V

PRINTED CIRCUIT BOARDS

MAIN/CRT/AV (INSERTED PARTS)

SOLDER SIDE

F-1 F-2

R406

R404

R734

R733

R708

R711 R709

R720

R721

R740

R716

R719

R352

R357

C354

R101

R126R128

R123

R102

R122

R120

R109

R121

R104 R124

R105

R106

R107

R119

R116

R117

C114

C113 R113

R112

R110

IC101

R115

R130

R129

C120

C121

C618 R639

R633

R609

R622

R615

R635

R634

C616

R638

R642

R646

IC601

R602

R601

R614

R619

R605

R626 R624

R630

R627

IC852

C607

C639 C634

R618

R860

C879

R864

R866

C886

C880

R859

C636

R853

C863

R858

R857

R851

R852

C512

C515

R132 R127

R861

R862

C554

R532

R533

C408

R645

R553

R640

R353

C708

C621

C626

R103

R704

R703

C623

R111

R114

C511

C129

C650

C651

R647

R134

R650

C656

R749

R815

R816

R811

R814

R813

R809

R133

R629

C658

C363

C119

C125

C128

C127

C811_1

C810_1

C809_1

C653

PRINTED CIRCUIT BOARDS

MAIN/CRT (CHIP MOUNTED PARTS)

SOLDER SIDE

F-3 F-4

ABC DEF GH

DEFLECTION SIGNAL

B.SIGNAL

G.SIGNAL

R.SIGNAL

TUNER VIDEO SIGNAL

THE DC VOLTAGE AT EACH PART WAS MEASURED

WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST

WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

NOTE:

TU001 ENV56D66G3

12 13

14 15

C118

4706.3V YK

C004

0.022 F

C119

0.01F

C125

0.01F

C127

100P CH

C128

100P CH

C113

15PCH

C114

15PCH

C129

220PCH

C124

0.1F

C120

0.001B

C121

220PCH

C002

4706.3V YK

C003

4.750V KA

C115

0.47

50V

C122

150VKA

R112

2.2K

R113

2.2K

R127

47K

R132 47K

R123 4.7K

R122 4.7K

R121 4.7K

R120 4.7K

R102

2.2K

R103

2.2K

R104

2.2K

R124

4.7K

R117

4.7K

R116

47K

R109

4.7K

R115

47K

R119

R105 2.2K

R106 2.2K

R111

220 R114

220

R10710K

R110

R001

18K1/2W

R134

10K

R118

R126

2.7K

R128

560

R101

560

R002

18K1/2W

R129

R133

470

R130

GND

B+

Vout

OS101

PIC-28143SY-2

OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE

NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME

DANS LA NOMENCLATURE DES PIECES

N’UTILISER QUE CELLS DECRITES

DANGEREUSES AN POINT DE VUE SECURITE

ETANTLES PIECES REPAREES PAR UNATTENTION:

DESCRIBED IN PARTS LIST ONLY

CRITICAL FOR SAFETY,USE ONES

ARESINCE THESE PARTS MARKED BYCAUTION:

D001

MTZJ30B

W804

W864

W863

W862

W827

TM101

RC-DW040

L101

2.7uH

Q101

DTC114TS

X-RAY TEST SW

IC199

S-24C02BDP-1A

MEMORY IC

1234

5678

SW101

SKHVBED010

20 CH DOWN

25/27 CH UP

SW102

SKHVBED010

25/27 CH DOWN

SW104

SKHVBED010

25/27 VOL DOWN

SW105

SKHVBED010

20/25/27 POWER

SW103

SKHVBED010

25/27 VOL UP

IC101 OEC7044C

MICON IC

110111213141516171819 22021

22 23 24 25 26 27 28 29

30 31 32 33 34 35 36 37 38 39

40 41 42

56789

X101

EFOEC8004T4

S805X

S807Y

CAUTION: DIGITAL TRANSISTOR

AGC

TUNER+5V

SYNC

P23/SYNC

I2C_OFF

Y_VIDEO

OSD_R

OSD_G

OSD_B

OSD_BLK

GND

POWER

AT+5V

AFT

SCL

SDA

RESET

X-RAY

X-RAY_TEST

DEGAUSS_H

GND

SDA

SCL

AUDIO_MUTE

AV1

AV2

EXT_MUTE

G-2G-1

FROM/TO CHROMA

ACCESSORY

PCB010

TMA501

BTL

BPL

SDA

SCL

ADRES

AGC

30.0

5.0

0.0

4.6

6.2

1.3

P02/AUDIO MUTE

P50/H.SYNC

P51/V.SYNC

P00/EXT MUTE

P01/I2C_OFF

V.HOLD

CVIN

VCC

OSC2

OSC1

AD1/X_RAY_TEST

SDA2

SCL2

SCL1

P10/DEGAUSS_H

OUT1/BLANK BL

BLUE B

GREEN G

RED R

AD4/AFT

RESET

V.S

4.9

4.8

3.9

4.9

3.0

0.8

3.4

3.7

4.2

0 4.9

4.1

3.6

4.9

3.2

5.0

4.9

CNVSS

VSS

P23/SYNC

P25/ON_TIMER

P24

AVCC

P03/(Surround)

P04

P05/(Center_SP)

HLF

Xin

Xout

AD6/KEY2

AD5/KEY1

X-RAY

P20/AV2

P21/AV1

P22/POWER

16.0

0.00.00.0

SDA

SCL

MODE

VCC

VSS

0.0

0.05.05.0 5.0

FROM/TO POWER

FROM/TO DEFLECTION/CRT

FROM/TO SOUND

TO JACK/SOUND

SDA1

INT1/REMOCON

INT2/P.FAIL

MICON/TUNER SCHEMATIC DIAGRAM

(MAIN PCB)

ABC DEF GH

X602

100CT3R505

D605

11E1-EIC

D604

1SS133

D607

1SS133

D611

1SS133

D601

1SS133

Q606

KTC3203_Y

REG

Q603

KTC3203_Y

5V REG

Q601

KTC3203_Y

5V REG

Q605

KTC3203_Y

5V REG

Q604

2SD734

5V REG

AUDIO SIGNAL

OUTOUTGININ

CF601

SAFGP45M7VHCZR

SAW FILTER

12345

IC601

M61206FP

CHROMA IC

1 10111213141516

17 18 19

20 21 22 23 24 25 26 27 28 29

30 31 32

33343536373839

404142434445464748

50515253545556575859

6061626364

789

CF604

TPSRA4M50C00-A0

CF603

SFSH4.5MCB

CP601

TKC-M06X-A1

DEFLECTION SIGNAL

B.SIGNAL

G.SIGNAL

R.SIGNAL

TUNER VIDEO SIGNAL

THE DC VOLTAGE AT EACH PART WAS MEASURED

WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST

WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

NOTE:

C659_2

470PB

C613_1

1TF

C653

100P CH

C6580.001CH

C626

0.001B

C616

15P CH

C636

0.01 B

C634

0.01F

C639

0.01 B

C621 0.01F

C618

22P CH

C622 0.015 M

C623100PCH

C656 100P CH

C607 0.01 F

C650 220P CH

C651

47P CH

C628

0.001 B

C606

0.2250V KA

C638_2

3316V KA

C640_1

4716V YK

C601

10006.3V YK

C647

150V KA

C612

100010V YK

C605

0.4750V KA

C604

150V KA

C625

150V KA

C652

150V KA

C635_1 4716V YK

C645_2

4716V KA

C632 2.250V KA

C603 150V KA

C624

4716V YK

C620

4.750V KA

R601

2.2K

R650 270

R63812K

R646 39K

R629

R624

R602

R606

10K

R615

470

R622

R639

100

R614 2.2K

R619 2.2K

R625

2.2K 1/4W

R642

8.2K

R609

330

R635 100

R626

10K

R648

1001/4W

R640

R653_1

5601/4W

R613

100

R633

8.2K

R618 10M

R605

5.6K

R627 100

R630 100

R631 1001/4W

R623

120 1/4W

R641

22K 1/4W

R645

R632

1001/2W

R63410K

R647

220

R604

2.2K

OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE

NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME

DANS LA NOMENCLATURE DES PIECES

N’UTILISER QUE CELLS DECRITES

DANGEREUSES AN POINT DE VUE SECURITE

ETANTLES PIECES REPAREES PAR UNATTENTION:

DESCRIBED IN PARTS LIST ONLY

CRITICAL FOR SAFETY,USE ONES

ARESINCE THESE PARTS MARKED BYCAUTION:

D609

MTZJ9.1B

D608

MTZJ9.1B

D606

MTZJ9.1B

D602

MTZJ8.2B

D610

MTZJ6.8B

W844

W810

W830

W817

W801 W802

L601

1.2uH

L606

2.2uH

L607

15uH

L608 6.8uH

Q608

DTC114ES

SWITCHING

S807X

CAUTION: DIGITAL TRANSISTOR

AT+10V

GND

AT+10V

Y_VIDEO

VIDEO_IN

STEREO+5V VIDEO

TU_AUDIO_OUT

FBT+8V

V_OUT

ABCL

V_FEEDBACK

GND

H_OUT

H_SYNC

B.OUT

P23/SYNC

IF G.OUT

Y_VIDEO

AT+5V R.OUT

SYNC

TUNER+5V CLAMP

RESET

AFT

AGC

GND

POWER

OSD_B

OSD_BLK

OSD_G

OSD_R

I2C_OFF

SDA

SCL

8 11 1312

TO JACK/SOUND

TO SOUND

FROM POWER

G-4G-3

FROM/TO JACK/SOUND

FROM/TO DEFLECTION/CRT

(MAIN PCB)

CHROMA SCHEMATIC DIAGRAM

PCB010

TMA501

FBP IN

SCL

RF AGC OUT

AFT OUT

VIF GND

VIF VIDEO OUT

QIF IN

VIF APC FILTER

VREG Vcc

VIF VCO F/B

AUDIO BYPASS

EXT AUDIO IN

FM DIRECT OUT

Hi Vcc

R OUT

AFC FILTER

DEF

H OUT

SDA

H VCO F/B

INV FBP OUT

POWER ON CONT

STRAT UP Vcc

B IN

V RAMP FEEDBACK

V RAMP CAP

VIDEO CHROMA Vcc

fsc OUT

V PULSE OUT

R IN

CHROMA APC FILTER

TV/Y IN

5v REG

VIDEO/CHROMA GND

FAST BLK

SPOT KILLER

G OUT

RF AGC FILTER

INTELLIGENT MONI

MCU RESET

VIF Vcc

5.7V REG OUT(FOR CPU)

47 LIMITER IN

48 IF AGC

49 QIF OUT

34 EXT C in

33 8.7V REG OUT

32 X’TAL

17 V OUT

16 B OUT

GND

SCL

SDA

IIC_OFF

INT.MONI

46 SW REG CONT

AUDIO OUT ACL/ABCL

Y SW OUT

8.8

15.08.2

4.97

10.64.8

5.5

2.3

3.0

2.3

3.8

3.1

9.2

3.0

2.6

2.9

1.8

2.9

1.8

1.5 5.0 5.0 2.7 4.9 6.2 6.2 0 0 4.9 3.5 4.9 4.9 4.0 4.0 4.8

4.5

8.2

2.5

5.6

5.0

7.3

5.0

2.6

3.5

2.02.90003.45.54.83.98.22.32.9 8.83.3

TEST POINT

64 VIF IN (1)

1 VIF IN (2)

G IN

7.6

5.6

7.6

5.6

4.97

5.6

4.97 7.6

VIDEO

0 8.28.2

FROM/TO MICON/TUNER

4.9

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Memorex INSTRUCTION MANUAL User manual

Brand: Memorex

Model: INSTRUCTION MANUAL

Category: CRT TVs

Type: User manual

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Memorex INSTRUCTION MANUAL User manual

Memorex INSTRUCTION MANUAL User manual

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