Sony KV-TG21L70, TG21M80, TG21P52 Service Manual

REVISION HISTORY BG2T CHASSIS

MODEL

PART NO. : 9-872-266-01

KV-TG21L70

KV-TG21M80

KV-TG21P52

NO	DATE	DESCRIPTION OF REVISION

SERVICE MANUAL

BG2TCHASSIS

MODEL

COMMANDER DEST.

CHASSIS NO.

MODEL

COMMANDER DEST. CHASSIS NO.

KV-TG21L70

RM-952

ME

SCC-U67F-A

KV-TG21M80 RM-952

Vietnam

SCC-U75A-A

KV-TG21P52 RM-952

Thailand

SCC-U73A-A

1	2	3
4	5	6
7	8	9
÷	0	JUMP
SOUND	Á	PROGR
MODE

FAVORITE

TV

TRINITRON ® COLOR TV

KV-TG21L70/TG21M80/TG21P52
		RM-952
			SPECIFICATIONS
					Note
	Power requirements		220-240 V AC, 50/60 Hz		KV-TG21P52
			110-240 V AC, 50/60 Hz		KV-TG21L70/TG21M80
	Power consumption (W)		Indicated on the rear of the TV
	Television system		B/G		KV-TG21L70/TG21P52
			B/G, I, D/K, M		KV-TG21M80
	Color system		PAL, PAL 60, NTSC3.58 (AV IN), NTSC4.43		KV-TG21P52
			PAL, PAL 60, NTSC3.58 (AV IN), NTSC4.43 SECAM		KV-TG21L70/TG21M80
	Stereo/Bilingual system		A2 Bilingual B/G		KV-TG21P52 only
	Channel coverage
			VHF: E2 to E12 / UHF: E21 to E69 /
		B/G	CATV: S01 to S03, S1 to S41
		I	UHF: B21 to B68 / CATV: S01 to S03, S1 to S41		KV-TG21M80 only
		D/K	VHF: C1 to C12, R1 to R12 / UHF: C13 to C57, R21 to R60		KV-TG21M80 only
		M	VHF: A2 to A13
			UHF: A14 to A79
			CATV: A-8 to A-2, A to W+4, W+6 to W+84		KV-TG21M80
	˘ (Antenna)		75-ohm external terminal
	Audio output (Speaker)		3W + 3W
	Number of terminal
		DVideo	Input: 2* Output: 1	Phono jacks; 1 VP-P, 75 ohms	* One input line available
		≥ Audio	Input: 2* Output: 1	Phono jacks; 500 mVrms	* One input line available
		2 (Headphone)	Output: 1	Stereo minijack
		(Earphone)	Output: 1	Monaural minijack	KV-TG21L70
	Picture tube		21 in.
		Tube size (cm)	54		Measured diagonally
		Screen size (cm)	51		Measured diagonally
	Dimension (w/h/d, mm)		497 x 458 x 487
	Mass (kg)		25

Design and specifications are subject to change without notice.

CAUTION

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON

THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

KV-TG21L70/TG21M80/TG21P52

RM-952

TABLE OF CONTENTS

Section				Title		Page		Section				Title		Page
...................................SELF DIAGNOSTIC FUNCTION						4		5.	DIAGRAMS
									5-1.		Block Diagram ........................................................			27
1.	GENERAL .................................................................					7			5-2.		Circuit Boards Location ..........................................			29
									5-3.		Schematic Diagram .................................................			30
2.	DISASSEMBLY										(1) Schematic Diagram of A Board ........................			31
	2-1.		Rear Cover Removal ...............................................			12					(2) Schematic Diagram of CV Board .....................			35
	2-2.		Speaker Removal ....................................................			12			5-4.		Voltage Measurement .............................................			38
	2-3.		Chassis Assy Removal ............................................			12			5-5.		Waveforms ..............................................................			41
	2-4.		Service Position ......................................................			12			5-6. Printed Wiring Boards and Parts Location .............					42
	2-5.		Terminal Bracket Removal .....................................			12			5-7.		Semiconductors .......................................................			45
	2-6.		Replacement of Parts ..............................................			12
			2-6-1. Replacement of Light Guide ........................			13		6.	EXPLODED VIEWS
			2-6-2. Replacement of Power Button .....................			13			6-1.		Picture Tube and Chassis ........................................			47
	2-7.		Picture Tube Removal .............................................			13
								7.	ELECTRICAL PARTS LIST ....................................					48
3. SET-UP ADJUSTMENTS
	3-1.		Beam Landing .........................................................			15
	3-2.		Convergence ............................................................			16
	3-3.		Focus Adjustment ....................................................			18
	3-4. G2 (SCREEN) and White Balance Adjustments					... 18
4.	CIRCUIT ADJUSTMENTS
	4-1.		Adjustment With Commander ................................			19
	4-2.		Adjustment Method ................................................			19
	4-3.		Picture Quality Adjustment ....................................			24
	4-4.		Deflection Adjustment ............................................			24
	4-5. A Board Adjustment After IC003 (MEMORY)
			Replacement ............................................................			24
	4-6.		Picture Distortion Adjustment ................................			25

– 3 –

KV-TG21L70/TG21M80/TG21P52

RM-952

SELF DIAGNOSTIC FUNCTION

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically begin to flash.

The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/ TIMER lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.

1. DIAGNOSTIC TEST INDICATORS

When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the lamp will identify the first of the problem areas.

Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.

Diagnostic	No. of times	Self-diagnostic	Probable	Detected
Item	STANDBY/TIMER	display/Diagnostic	Cause	Symptoms
Description	lamp flashes	result	Location
• Power does not	Does not light	—	• Power cord is not	• Power does not come on.
turn on			plugged in.	• No power is supplied to
			• Fuse is burned out	the TV.
			F4601 (F)	• AC power supply is faulty.
• +B overcurrent	2 times	002:000 or	• H.OUT Q801 is shorted.	• Power does not come on.
(OCP)		002:001~255	(A board)	• Load on power line is
• Horizontal				shorted.
deflection				• Has entered standby state
overdrive				after horizontal raster.
				• Power line is shorted or
				power supply is stopped.
• White balance		004:000 or	• -13V is not supplied.	• Vertical deflection pulse
failure (no		004:001~225	(CV Board)	is stopped
PICTURE)	4 times		• IC551 faulty (A board)
• Vertical deflection
stopped
• Micro reset	—	101:00 or	• Discharge CRT	• Power is shut down
		101:001~225	(CV Board)	shortly, after this return
			• Static discharge	back to normal.
			• External noise	• Detect Micro latch up.

Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is diagnosed first by the microcontroller is displayed on the screen.

Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.

– 4 –

KV-TG21L70/TG21M80/TG21P52

RM-952

2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT

Diagnostic Item

Flash Count*

2 times

+B overcurrent/overvoltage

2 times

Vertical deflection stopped

4 times

4 times

Lamp ON 0.3 sec.

* One flash count is not used for self-diagnostic.

Lamp OFF 0.3 sec.

Lamp OFF 3 sec.

STANDBY/SLEEP lamp

3. STOPPING THE STANDBY/TIMER FLASH

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER lamp from flashing.

4. SELF-DIAGNOSTIC SCREEN DISPLAY

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]

In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

[Screen display] / channel [5] / Sound volume [-] / Power ON

˘

Note that this differs from entering the service mode (mode volume [+]).

Self-Diagnosis screen display

SELF DIAGNOSTIC

002 : 000 Numeral "0" means that no fault has been detected.

004 : 000

101 : 000

– 5 –

KV-TG21L70/TG21M80/TG21P52

RM-952

5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to “0”.

Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs.

[Clearing the result display]

To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the diagnostic screen is being displayed.

Channel [8] / 0

[Quitting Self-diagnostic screen]

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

6. SELF-DIAGNOSTIC CIRCUIT

		IC301		IC001		IC003
	Y/CHROMA JUNGLE			SYSTEM		MEMORY
		[V]	17	IO-8DAT	53	5 B-DAT
		D553
FROM	50	MP/		O-LED	51
[+B] Q500		PROTECT
		SDA 8	54	IO-SDAT

[+B overcurrent ªOCPº]	Occurs when an overcurrent on the +B(135) line is detected by Q500. If Q500 go to
	ON and the voltage to pin 50 of IC301 more than 3.5V when V.SYNC is more than
	seven verticals in a period, the unit will automatically turn off.
[Vertical deflection stopped]	Occurs when an absence of the vertical deflection pulse is detected by Pin 17 and
	IC001 shut down the power supply.
[White balance failure]	If the RGB levels* do not balance or become low level within 5 seconds, this error
	will be detected by IC301. TV will stay on, but there will be no picture.
	* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

– 6 –

A Getting Started (KV-TG21M80)

Step 1

	Insert the batteries (supplied) into the remote.
b	Note

• Do not use old batteries nor use different types of batteries together.

Step 2

Connect the antenna cable (not supplied) to 8 (antenna input) at the rear of the TV.

Tip

• You can also connect your TV to other optional components.

		(See E)
		Step 3
		Plug in the power cord, then press ! on the TV to
	b	turn it on.
	SELECT	Step 4
		Press SELECT and PROGR + on the TV at the same time
		for one to two seconds to preset the channels
	PROGR	automatically. (See J)
		Tip
		• To stop the automatic channel presetting, press SELECT twice.
	SELECT	Step 5
		Press SELECT on the remote until “		/
		LANGUAGE:	” appears on the screen, then
		press + or – to change the on-sceen display language.
SECTION1 GENERAL	A Getting Started (KV-TG21L70)

Step 1

Insert the batteries (supplied) into the remote.

b	Note

•Do not use old batteries nor use different types of batteries together.

Step 2

The operating instruction mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.

b

SELECT

PROGR

SELECT

Connect the antenna cable (not supplied) to 8 at the rear of the TV.

Tip

•You can also connect your TV to other optional components. (See E)

Step 3

Plug in the power cord, then press ! on the TV to turn it on.

Step 4

Press SELECT and PROGR + on the TV at the same time for one to two seconds to preset the channels automatically. (See J)

Tip

• To stop the automatic channel presetting, press SELECT twice.

Step 5

Press SELECT on the remote until “LANGUAGE/: ENGLISH” appears on the screen, then press + or – to change the on-screen display language.

KV-TG21L70/TG21M80/TG21P52

RM-952

A Getting Started (KV-TG21P52)

Step 1

Insert the batteries (supplied) into the remote.

b	Note

•Do not use old batteries nor use different types of batteries together.

Step 2

Connect the antenna cable (not supplied) to 8 at the rear of the TV.

Tip

•You can also connect your TV to other optional components. (See E)

	Step 3
	Plug in the power cord, then press ! on the TV to
b	turn it on.
SELECT	Step 4

Press SELECT and PROGR + on the TV at the same time for one to two seconds to preset the channels

automatically. (See J)

PROGR

Tip

• To stop the automatic channel presetting, press SELECT.

SELECT	Step 5

Press SELECT on the remote until “LANGUAGE/ : ENGLISH” appears on the screen, then press + or – to change the on-sceen display language.

B WARNING

•Dangerously high voltages are present inside the TV.

•TV operating voltage: 110 – 240 V AC. (KV-TG21M80/TG21L70)

220 – 240 V AC. (KV-TG21P52)

•Do not plug in the power cord until you have completed making all other connections; otherwise a minimum leakage current might flow through the antenna and other terminals to ground.

•To avoid battery leakage and damage to the remote, remove the batteries from the remote if you are not going to use it for several days. If any liquid that leaks from the batteries touches you, immediately wash it away with water.

For your own safety, do not touch any part of the	For children’s safety, do not leave children alone
TV, the power cord and the antenna cable during	with the TV. Do not allow children to climb onto
lightning storms.	it.

	Do not operate the TV if any liquid or solid object
To prevent fire or shock hazard, do not expose the	falls into it. Have it checked immediately by
TV to rain or moisture.	qualified personnel only.

Do not block the ventilation openings of the TV.	Clean the TV with a dry and soft cloth. Do not
Do not install the TV in a confined space, such as	use benzine, thinner, or any other chemicals to
a bookcase or built-in cabinet.	clean the TV. Do not scratch the picture tube.

Do not open the cabinet and the rear cover of the	Your TV is recommended for home use only.
TV as high voltages and other hazards are present	Do not use the TV in any vehicle or where it may
inside the TV. Refer servicing and disposal of the	be subject to excessive dust, heat, moisture or
TV to qualified personnel.	vibrations.

– 7 –

KV-TG21L70/TG21M80/TG21P52

RM-952

WARNING (continued)

	Do not plug in too many appliances to the same
Do not place any objects on the TV.	power socket. Do not damage the power cord.
	Pull the power cord out by the plug. Do not pull
	the power cord itself. Even if your TV is turned
Install the TV on a stable TV stand and floor	off, it is still connected to the AC power source
which can support the TV set weight. Ensure that	(mains) as long as the power cord is plugged in.
the TV stand surface is flat and its area is larger	Unplug the TV before moving it or if you are not
than the bottom area of the TV.	going to use it for several days.

C Securing the TV

To prevent the TV from falling, use the supplied screws, clamps and band to secure the TV.

	20 mm
	3.8 mm
screws	clamps	band

Screw the band to the TV stand and to the provided hole at the rear of your TV.

or

(1) Put a cord or chain through the clamps.

(2) Screw one clamp to a wall or pillar and the other clamp to the provided hole at the rear of your TV.

Note

• Use only the supplied screws. Use of other screws may damage the TV.

E Connecting optional components

(KV-TG21M80/TG21P52)

Connecting to the video input terminal ( t )

TV front panel

(MONO)
L	R

Audio/Video cable
(not supplied)	Camcorder

TV rear panel

Video game equipment

R L(MONO)

Antenna cable (not supplied)

Audio/Video cable (not supplied)

VCR

Note

•Do not connect video equipment to t (video input) at the front and the rear of your TV at the same time; otherwise the picture will not be displayed properly on the screen.

Connecting to the monitor output terminal (T)

TV rear panel

R L(MONO)

Audio/Video cable	Audio system
(not supplied)
	VCR

D TV front and rear panels

TV rear panel

0

R L(MONO)

qa

E Connecting optional components

(KV-TG21L70 only)

Connecting to the video input terminal ( t )

TV front panel

Audio/Video cable
(not supplied)	Camcorder

qs

TV rear panel

TV front panel
					!
(MONO)	R
L		SELECT		PROGR
9	8	7 6	5	4	3 2 1

Video game equipment

Antenna cable (not supplied)

Audio/Video cable (not supplied)

Button		Function
1	!	Turn off completely or turn on the TV.
2		Remote control sensor.
3	1	Standby indicator.
3		Wake Up indicator.
4 PROGR +/–		Select program number.
5	2 +/– *	Adjust volume.
6 t		Select TV or video input.
7 SELECT		Select the desired item.
8 i		Headphone terminal. (KV-TG21M80/TG21P52)
8		Earphone terminal. (KV-PG21L70 only)
9, qa t		Video input terminal.
0	8	Antenna terminal.
qs T		Monitor output terminal.

VCR

Note

•Do not connect video equipment to t (video input) at the front and the rear of your TV at the same time; otherwise the picture will not be displayed properly on the screen.

Connecting to the monitor output terminal (T)

TV rear panel

Audio/Video cable		Audio system
(not supplied)

* You can also use the 2 +/– buttons on the TV to work as the +/– buttons on the remote.

VCR

– 8 –

F Troubleshooting

If you find any problem while viewing your TV, please check the following guide. If any problem persists, contact your Sony dealer.

Symptom	Solutions
Snowy picture,	• Check the antenna cable and connection on the TV, VCR and on the wall.
noisy sound	• Preset the channel manually again. (See J)
	• Check the antenna setup. Contact a Sony dealer for advice.
Good picture,	• Select the appropriate TV system. (See J) (KV-TG21M80 only)
noisy sound	• Press A/B until the sound is optimal. (KV-TG21P52 only)
No picture,no sound	• Check the power cord, antenna and the VCR connections.
	• Press ?/1 (power) or ! (main power) to turn on the TV.
Good picture, no sound	• Press 2 + to increase the volume level.
	• Press % to cancel the muting.
Dotted lines or stripes	• Do not use a hair dryer or other equipment near the TV.
	• Check the antenna setup. Contact a Sony dealer for advice.
Double images or	• Use the fine tuning ("FINE") function. (See J)
“ghosts”	• Turn off or disconnect the booster if it is in use.
	• Check the antenna setup. Contact a Sony dealer for advice.
No color	• Select the appropriate color system. (See J)
	• Adjust the color level. (See K)
	• Check the antenna setup. Contact a Sony dealer for advice.
Abnormal color	• Keep external speakers or other electrical equipment away from the TV.
patches	Press ! (main power) to turn off the TV for about 15 minutes, then turn
	it on again to demagnetize the TV.
The 1 (standby)	• Count the number of times the 1 (standby) indicator flashes. Press !
indicator on your TV	(main power) to turn off your TV. Contact your nearest Sony service
flashes red several	center.
times after every
three seconds.
TV cabinet creaks.	• Changes in room temperature sometimes make the TV cabinet expand or
	contract, making a noise. This does not indicate a malfunction.
A "boom" sound is	• The TV's demagnetizing function is working. This does not indicate a
heard when the TV is	malfunction.
turned on.

KV-TG21L70/TG21M80/TG21P52

RM-952

H Remote control

0						Button	Function	See
qa				1	1 ?/1		Turn off temporarily or	–
							turn on the TV.	–
qs				2	2	a	Display the TV program.
								–
qd	1	2	3		3 JUMP		Jump to previous
							program number.
qf	4	5	6		4 PROGR +/–		Select program number.	–
	7	8	9		5 2 +/–		Adjust volume.	–
					6 SELECT		Select the desired item.	–
	-	0
			JUMP	3 7 PIC MODE			Select picture mode.	K
	SOUND	2	PROGR
				4 9 +/–
qg	MODE						Adjust items.	–
				5 0			Display on-screen	–
qh							information.
qj				6	qa %		Mute the sound.	–
					qd t		Select TV or video input.	–
qk				7	qf 0 – 9, ÷		Input numbers.	–
ql	FAVORITE			8 Timer operations
					qj		Set TV to turn on	I
				9
							automatically.
		TV			qk		Set TV to turn off	I
							automatically.

Sound mode operations (except KV-TG21L70 only)

	qg SOUND MODE	Select sound mode.	K
Bilingual operations (KV-TG21P52 only)
	qh A/B	Select bilingual mode.	M
Teletext operations
	8 x (red, green,
	yellow, blue)
0
	qs	Not function for your TV.	–
	qd
	qh
	qj
	qk
ql FAVORITE		Not function for your TV.	–

F Troubleshooting (KV-TG21L70 only)

If you find any problem while viewing your TV, please check the following guide. If any problem persists, contact your Sony dealer.

Symptom	Solutions
Snowy picture,	• Check the antenna cable and connection on the TV, VCR and on the wall.
noisy sound	• Preset the channel manually again. (See J)
	• Check the antenna setup. Contact a Sony dealer for advice.
No picture, no sound	• Check the power cord, antenna and the VCR connections.
	• Press ?/1 (power) or ! (main power) to turn on the TV.
Good picture, no sound	• Press 2 + to increase the volume level.
	• Press % to cancel the muting.
Dotted lines or stripes	• Do not use a hair dryer or other equipment near the TV.
	• Check the antenna setup. Contact a Sony dealer for advice.
Double images or	• Use the fine tuning ("FINE") function. (See J)
“ghosts”	• Turn off or disconnect the booster if it is in use.
	• Check the antenna setup. Contact a Sony dealer for advice.
No color	• Select the appropriate color system. (See J)
	• Adjust the color level. (See K)
	• Check the antenna setup. Contact a Sony dealer for advice.
Abnormal color	• Keep external speakers or other electrical equipment away from the TV.
patches	Press ! (main power) to turn off the TV for about 15 minutes, then turn
	it on again to demagnetize the TV.
The 1 (standby)	• Count the number of times the 1 (standby) indicator flashes. Press !
indicator on your TV	(main power) to turn off your TV. Contact your nearest Sony service
flashes red several	center.
times after every
three seconds.
TV cabinet creaks.	• Changes in room temperature sometimes make the TV cabinet expand or
	contract, making a noise. This does not indicate a malfunction.
A "boom" sound is	• The TV's demagnetizing function is working. This does not indicate a
heard when the TV is	malfunction.
turned on.

I Setting the timers

You can turn on and off your TV by using the and buttons respectively.

\/1

1 2 3

4 5 6

7 8 9

-0 JUMP

SOUND	2	PROGR
MODE

FAVORITE

TV

Setting the Wake Up timer

1 Press until the desired period of time appears on the screen.

WAKE UP TIMER:0H10M (After 10 minutes)

WAKE UP TIMER:OFF		WAKE UP TIMER:12H00M
(No Wake Up timer)		(After 12 hours)

The Wake Up timer starts immediately after you have set it.

2 Select the program number or video input you want to wake up to.

3 Press \/1, or set the Sleep timer if you want the TV to turn off automatically.

The indicator on the TV lights up orange when the TV goes into standby mode.

Setting the Sleep timer

Press until the desired period of time appears on the screen.

SLEEP TIMER:30M		SLEEP TIMER:60M
(After 30 minutes)		(After 60 minutes)

SLEEP TIMER:OFF		SLEEP TIMER:90M
(No Sleep timer)		(After 90 minutes)

The Sleep timer starts immediately after you have set it.

Notes

•You can also cancel the Wake Up and Sleep timers by turning off the TV’s main power.

•If no buttons or controls are pressed for more than two hours after the TV is turned on using the Wake Up timer, the TV automatically goes into standby mode.

– 9 –

KV-TG21L70/TG21M80/TG21P52

RM-952

J Presetting channels

You can automatically preset up to 100 TV channels in numerical sequence from program number 1, or manually preset desired channels and channels that cannot be preset automatically.

	1	2	3
Number	4	5	6
buttons	7	8	9
	-	0	JUMP
	SOUND	2	PROGR

MODE

+ or –

FAVORITE

PIC MODE

SELECT

TV

PROGR +/–

Presetting channels automatically from a specified program number

1 Press SELECT until “AUTO PROGRAM” appears on the screen.

2 Press + or – once to enter the “AUTO PROGRAM” mode.

The on-screen display will start flashing.

3 Press PROGR +/– or the number buttons until the desired program number appears on the screen.

4 Press + or – to start presetting channels automatically.

Presetting channels manually

1 Press SELECT until “MANUAL PROGRAM” appears on the screen.

2 Press + or – once to enter the “MANUAL PROGRAM” mode.

3 Press PROGR +/– or the number buttons until the desired program number appears on the screen.

4 Press + or – until the desired channel picture appears on the screen.

5 To preset other channels manually, repeat steps

3 to 4.

Presetting channels (continued) (KV-TG21M80)

To change the TV system setting

If the picture or sound is abnormal when receiving programs through the 8 (antenna input) terminal

(1)Press SELECT until “TV SYS” appears on the screen.

(2)Press + or – to select the appropriate TV system until the picture or sound quality is optimal.

B/G I D/K M

To change the color system setting

If the color is abnormal when receiving programs through the 8 (antenna input) terminal or the t (video input) terminal

(1)Press SELECT until “COLOR SYS” appears on the screen.

(2)Press + or – to select the appropriate color system until the color is optimal.

AUTO PAL SECAM NTSC3.58 NTSC4.43

To skip program numbers

(1)Press PROGR +/– or the number buttons until the unused or unwanted program number appears on the screen.

(2)Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3)Press + or – once to enter the “MANUAL PROGRAM” mode.

(4)Press PIC MODE to skip the unused or unwanted program number.

(5)Press SELECT to exit the “MANUAL PROGRAM” mode.

Note

• To restore the skipped program number again, preset the channel automatically or manually.

To use the fine tuning function

The fine tuning (FINE) function may help to reduce the following problems: double images and lines moving across the TV screen.

You can use the fine tuning function as below:

(1)Select the program number you want to adjust.

(2)Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3)Press + or – once to enter the “MANUAL PROGRAM” mode.

(4)Pressto display “FINE” on the screen.

(5)Press + or – continuously until the above problems are minimized. The + or – icon on the screen flashes while tuning.

(6)Press SELECT to exit the “MANUAL PROGRAM” mode.

Presetting channels (continued) (KV-TG21P52)

To change the color system setting

If the color is abnormal when receiving programs through the 8 (antenna) terminal or the t (video input) terminal

(1)Press SELECT until “COLOR SYS” appears on the screen.

(2)Press + or – to select the appropriate color system until the color is optimal.

AUTO PAL NTSC3.58 NTSC4.43

To skip program numbers

(1)Press PROGR +/– or the number buttons until the unused or unwanted program number appears on the screen.

(2)Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3)Press + or – once to enter the “MANUAL PROGRAM” mode.

(4)Press PIC MODE to skip the unused or unwanted program number.

(5)Press SELECT to exit the “MANUAL PROGRAM” mode.

Note

• To restore the skipped program number again, preset the channel automatically or manually.

To use the fine tuning function

The fine tuning (FINE) function may help to reduce the following problems: double images and lines moving across the TV screen.

You can use the fine tuning function as below:

(1)Select the program number you want to adjust.

(2)Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3)Press + or – once to enter the “MANUAL PROGRAM” mode.

(4)Pressto display “FINE” on the screen.

(5)Press + or – continuously until the above problems are minimized. The + or – icon on the screen flashes while tuning.

(6)Press SELECT to exit the “MANUAL PROGRAM” mode.

Presetting channels (continued) (KV-TG21L70)

To change the color system setting

If the color is abnormal when receiving programs through the 8 (antenna) terminal or the t (video input) terminal

(1)Press SELECT until “COLOR SYS” appears on the screen.

(2)Press + or – to select the appropriate color system until the color is optimal.

AUTO PAL SECAM NTSC3.58 NTSC4.43

To skip program numbers

(1)Press PROGR +/– or the number buttons until the unused or unwanted program number appears on the screen.

(2)Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3)Press + or – once to enter the “MANUAL PROGRAM” mode.

(4)Press PIC MODE to skip the unused or unwanted program number.

(5)Press SELECT to exit the “MANUAL PROGRAM” mode.

Note

• To restore the skipped program number again, preset the channel automatically or manually.

To use the fine tuning function

The fine tuning (FINE) function may help to reduce the following problems: double images and lines moving across the TV screen.

You can use the fine tuning function as below:

(1)Select the program number you want to adjust.

(2)Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3)Press + or – once to enter the “MANUAL PROGRAM” mode.

(4)Pressto display “FINE” on the screen.

(5)Press + or – continuously until the above problems are minimized. The + or – icon on the screen flashes while tuning.

(6)Press SELECT to exit the “MANUAL PROGRAM” mode.

– 10 –

K Customizing the picture and sound

(KV-TG21M80/TG21P52)

You can customize the picture and sound by selecting the picture and sound modes or by adjusting its settings.

1	2	3
4	5	6
7	8	9
-	0	JUMP
SOUND	2	PROGR

SOUND MODE

MODE

SELECT + or –

FAVORITE

PIC MODE

TV

Selecting the picture mode

Press PIC MODE to select the desired picture mode.

Select	To
“DYNAMIC”	view high contrast pictures.
“STANDARD”	view normal contrast pictures.
“SOFT”	view mild pictures.

Selecting the sound mode

B KV-TG21P52 only

Press SOUND MODE to select the desired sound mode.

Select		To
“9	DYNAMIC”	listen to dynamic and clear
		sound that emphasizes the low
		and high sound.
“9	DRAMA”	listen to sound that emphasizes
		vocals and background music.
“9	SOFT”	listen to soft sound.

Adjusting the picture and sound settings

1 Press SELECT until the desired setting appears.

Each time you press SELECT, the setting item will change as follows:

PICTURE COLOR BRIGHT HUE

	BALANCE		TREBLE		BASS		SHARP
2	Press + or – to adjust the item.
3	To adjust other items, repeat steps 1 to 2.

Notes

•“BASS”, “TREBLE” and “BALANCE” can be adjusted for KV-TG21P52 only.

•“HUE” can be adjusted for the NTSC color system only.

•Reducing “SHARP” can also reduce picture noise.

K Customizing the picture (KV-TG21L70)

You can customize the picture by selecting the picture mode or by adjusting its settings.

Selecting the picture mode

Press PIC MODE to select the desired picture mode.

1 2 3

4 5 6

7 8 9

- 0 JUMP

SOUND	2	PROGR
MODE

SELECT

+ or –

FAVORITE

PIC MODE

TV

Notes

Select

To

“DYNAMIC” view high contrast pictures.

“STANDARD” view normal contrast pictures.

“SOFT”

view mild pictures.

Adjusting the picture setting

1 Press SELECT until the desired setting appears.

Each time you press SELECT, the setting item will change as follows:

PICTURE COLOR BRIGHT

SHARP HUE

2 Press + or – to adjust the item.

3 To adjust other items, repeat steps 1 to 2.

•“HUE” can be adjusted for the NTSC color system only.

•Reducing “SHARP” can also reduce picture noise.

KV-TG21L70/TG21M80/TG21P52

RM-952

L Enjoying bilingual program (KV-TG21P52)

You can enjoy bilingual program of A2 bilingual system by using the A/B button.

When receiving an A2 program

		Broadcasting	On-screen display (Selected sound)
		A2
1	2	3	MAIN	t	SUB
		bilingual	(Main sound)		(Sub sound)
4	5	6
7	8	9	t

-0 JUMP

SOUND	2	PROGR
MODE

A/B

FAVORITE

TV

Note

•When viewing a non-bilingual program, select the main sound. Otherwise, you may hear some noise or abnormal sound.

– 11 –

	SECTION 2
	DISASSEMBLY
2-1. REAR COVER REMOVAL	2-2. SPEAKER REMOVAL	2-3. CHASSIS ASSY REMOVAL
	1 Rear Cover

1 Seven screws (+BVTP 4 × 16)

1 Four screws
(BVTP 3 ×	12)	CRT SUPPORT

1 Four screws (BVTP 3 × 12)

Push claw

–12 –	2-5. TERMINAL BRACKET REMOVAL
2-4. SERVICE POSITION

1 One screw
(+BVTP 4 ×	16)

2 Terminal Bracket

Caution: Do not take out CRT support block while TV set in standing position. Note: Undress necessary wires that creates tension while placing the chassis into Service Position.

TG21L70/TG21M80/TG21P52-KV 952-RM

2-6. REPLACEMENT OF PARTS

For replacements of light guide,unscrew them, exchange with new parts and fix them with screws respectively.

2-6-1. Replacement of Light Guide

One screw
(+BVTP 3 ×	12)

2-6-2. Replacement of Power Button

–13 – 1 Push to direction of arrow and remove

2-7. PICTURE TUBE REMOVAL

Note:

•Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom right and left.

!™ Cushion DGC

8 Demagnetic coil

4Four screws (BVTP 3 × 12)

	2 CV board
	5 Deflection
	yoke
3 Speaker
(5	× 9cm)
!º Two screws	1 Anode
	cap
(Tapping 5+
Crown Washer)

Coating earth assy

CRT Support Block

	!¡ Holder DGC
	!£ Cushion DGC
	7 Chassis assy
	A Board
Tension	4 Four screws
spring	(BVTP 3	× 12)
	9Two screws
	(Tapping 5 +
	Crown Washer)
		PWB Bracket

Screw Location

Beznet Hook

CRT Support Block

!∞ Picture tube	Slim Beznet
	!¢ Cushion

TG21L70/TG21M80/TG21P52-KV 952-RM

	• REMOVAL OF ANODE-CAP
	NOTE : After removing the anode, short circuit the anode of the picture tube and
	the anode cap to the metal chassis, CRT shield or carbon paint on the
	CRT.
	• REMOVING PROCEDURES
	a
	a
	1 Turn up one side of the rubber cap in the direction indicated by the arrow a.
	b
	b
–
–14	2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.
	c

Anode button

3When one side of the rubber cap is separated from the anode button, the anode-cap can be removed by turning up the rubber cap and pulling it up in the direction of the arrow c.

•HOW TO HANDLE AN ANODE-CAP

1 Do not damage the surface of anode-caps with sharp shaped objects.

2Do not press the rubber too hard so as not to damage the inside of anode-cap. A metal fitting called the shatter-hook terminal is built into the rubber.

3Do not turn the foot of rubber over too hard.

The shatter-hook terminal will stick out or damage the rubber.

TG21L70/TG21M80/TG21P52-KV 952-RM

KV-TG21L70/TG21M80/TG21P52

RM-952

SECTION 3

SET-UP ADJUSTMENTS

The following adjustments should be made when a complete		Perform the adjustments in the following order :
realignment is required or a new picture tube is installed.		1.	Beam Landing
These adjustments should be performed with rated power		2.	Convergence
supply voltage unless otherwise noted.		3.	Focus
		4.	White Balance
Controls and switches should be set as follows unless otherwise		Note : Test Equipment Required.
noted:			1.	Pattern Generator
PICTURE control ...........................................................	normal		2.	Degausser
BRIGHTNESS control ...................................................	normal		3.	Oscilloscope

................................................................................................................................................................................................................................

Preparation :

In order to reduce the influence of geomagnetism on the set's picture tube, face it east or west.

Switch on the set's power and degauss with the degausser.

3-1. BEAM LANDING

1.Input a white signal with the pattern generator.

Contrast }

normal

Brightness

2.Set the pattern generator raster signal to a green raster.

3.Move the deflection yoke to the rear and adjust with the purity control so that the green is at the center and the blue and the red take up equally sized areas on each side.

(See Figures 3-1 through 3-4.)

4.Move the deflection yoke forward and adjust so that the entire screen is green. (See Figure 3-1.)

5.Switch the raster signal to blue, then to red and verify the condition.

6.When the position of the deflection yoke has been decided, fasten the deflection yoke with the screws and DY spacers.

7.If the beam does not land correctly in all the corners, use a magnet to adjust it.

(See Figure 3-4.)

Fig. 3-1

Purity control

Fig. 3-2

Blue

Red

Green

Fig. 3-3

Purity control

corrects this area.

Disk magnets or rotatable disk magnets correct these areas (a-d).

ba

cd

Deflection yoke positioning corrects these areas.

b

c

a

d

Fig. 3-4

– 15 –