Sharp 20GT15 Schematic

SERVICE MANUAL

S30X520GT-15/

COLOUR TELEVISION

Chassis No. UA-1

20GT-15

COLOUR TELEVISION

• FEATURES ...................................................................................................................................................... 2

• SPECIFICATIONS ........................................................................................................................................... 2

• IMPORTANT SERVICE NOTES ...................................................................................................................... 3

• ADJUSTMENT PRECAUTION......................................................................................................................... 3

• UA1 HOTEL MODE APPLICATION ................................................................................................................. 4

• SERVICE MODE.............................................................................................................................................. 4

• TROUBLE SHOOTING TABLE...................................................................................................................... 18

MODEL 20GT-15

• SOLID STATE DEVICE BASE DIAGRAM ..................................................................................................... 20

• CHASSIS LAYOUT ........................................................................................................................................ 21

• BLOCK DIAGRAM ......................................................................................................................................... 22

• WAVEFORMS................................................................................................................................................ 25

• SCHEMATIC DIAGRAM

• DESCRIPTION OF SCHEMATIC DIAGRAM ................................................................................................. 26

■ INFRARED REMOTE CONTROL UNIT ....................................................................................................27

■ TUNER ...................................................................................................................................................... 28

■ CRT UNIT.................................................................................................................................................. 29

■ MAIN UNIT ................................................................................................................................................ 30

• PRINTED WIRING BOARD ASSEMBLIES.................................................................................................... 32

• REPLACEMENT PARTS LIST

■ ELECTRICAL PARTS................................................................................................................................ 37

■ SUPPLIED ACCESSORIES ...................................................................................................................... 41

■ PACKING PARTS...................................................................................................................................... 41

■ CABINET PARTS ...................................................................................................................................... 41

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

CONTENTS

20GT-15

Page

WARNING

The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user – serviceable parts inside. Refer servicing to qualified service personnel.

SHARP CORPORATION

1

20GT-15

SPECIFICATIONS

Depth: 479.0 mm

Height: 476.0 mm

Weight (approx.): 17.2 kg

Convergence...........................................................................Self Converging System

Focus .............................................................................Quadra-Potential Electrostatic

Sweep Deflection ............................................................................................Magnetic

Intermediate Frequencies

FEATURES

5.74 MHz .......................................................................................33.16 MHz

5.50 MHz .......................................................................................33.40 MHz

Picture IF Carrier.......................................................................................38.9 MHz

Sound IF Carrier Frequency

Colour Sub-Carrier Frequency................................................................34.47 MHz

Power Input ............................................................................ 110 - 240V AC 50/60 Hz

Power Consumption..............................................................................................75 W

Size .................................................................................................. 5 × 9 cm (1 pc)

Audio Power Output Rating...................................................................3.0 W (at Max.)

Speaker

Voice Coil Impedance ................................................................ 16 ohms at 400 Hz

VHF/UHF ................................................................................. 75 ohm Unbalanced

Aerial Input Impedance

Receiving System ................................................................................. CCIR/PAL B, G

Tuner Ranges

» VHF-Channels............................ E2 (48.25 MHz) thru E12 (224.25 MHz)

» UHF-Channels........................ E21 (471.25 MHz) thru E69 (855.25 MHz)

Dimensions ........................................................................................ Width: 506.0 mm

Cabinet Material ........................................................................................... All Plastics

Specifications are subject to change without prior notice.

Favourite Channel

Full Auto Channel Preset and Auto Channel Skip

100-CH Program MemoryËCATV (Hyper Band) Ready 〈Used Frequency Synthesizer Tuner〉ËAVL (Sound Keeper) Function

Ë

Black Stretch Circuit

On Timer/Sleep Timer/Reminder TimerËBlue Back Noise Mute

Rear AV - In/Out TerminalsËColour-Comb Filter (NTSC Only)

Ë

High Contrast Picture

Hotel Mode

English/Thai OSD

Ë

2

20GT-15

SPECIFICATIONS

Depth: 479.0 mm

Height: 476.0 mm

Weight (approx.): 17.2 kg

Convergence...........................................................................Self Converging System

Focus .............................................................................Quadra-Potential Electrostatic

Sweep Deflection ............................................................................................Magnetic

Intermediate Frequencies

FEATURES

5.74 MHz .......................................................................................33.16 MHz

5.50 MHz .......................................................................................33.40 MHz

Picture IF Carrier....................................................................................... 38.9 MHz

Sound IF Carrier Frequency

Colour Sub-Carrier Frequency................................................................34.47 MHz

Power Input ............................................................................ 110 - 240V AC 50/60 Hz

Power Consumption..............................................................................................75 W

Size .................................................................................................. 5 × 9 cm (1 pc)

Audio Power Output Rating...................................................................3.0 W (at Max.)

Speaker

Voice Coil Impedance ................................................................ 16 ohms at 400 Hz

VHF/UHF ................................................................................. 75 ohm Unbalanced

Aerial Input Impedance

Receiving System ................................................................................. CCIR/PAL B, G

Tuner Ranges

» VHF-Channels............................ E2 (48.25 MHz) thru E12 (224.25 MHz)

» UHF-Channels........................ E21 (471.25 MHz) thru E69 (855.25 MHz)

Dimensions ........................................................................................ Width: 506.0 mm

Cabinet Material ........................................................................................... All Plastics

Specifications are subject to change without prior notice.

Favourite Channel

Full Auto Channel Preset and Auto Channel Skip

100-CH Program MemoryËCATV (Hyper Band) Ready 〈Used Frequency Synthesizer Tuner〉ËAVL (Sound Keeper) Function

Ë

Black Stretch Circuit

On Timer/Sleep Timer/Reminder TimerËBlue Back Noise Mute

Rear AV - In/Out TerminalsËColour-Comb Filter (NTSC Only)

Ë

High Contrast Picture

Hotel Mode

English/Thai OSD

Ë

2

20GT-15

ADJUSTMENT PRECAUTION

This model’s setting are adjusted in two diff erent w ays: through the I2C bus control and

in the conventional analog manner. The adjustments via the I2C bus control include

preset-only items and variable data.

Beam current.

mode position, and the microprocessor is in input mode. (Adjustment through

the I2C bus control). (Use JWS Key to set as well).

the mode one by one.

reversibly one by one.

modified.

(OFF) position, and the microprocessor is in out of the service mode.

(1). Short JA 122 & JA 124 for 1 second and release to switch to the ser vice

1. Setting the service mode by the microprocessor.

(2). Press the CH DOWN / UP k ey on the remote controller to get ready to select

(3). Press the CH DOWN / UP key on the remote controller to select the modes

(4). Using the VOLUME UP/ DO WN ke y on the remote controller , the data can be

(5). Short JA 122 & JA 124 for 1 second and release to s witch to the normal mode

2. Factory Presetting.

mode position and turn on the main power switch. Initial values are automati-

cally preset, only when a new EEPROM is used (Judge with the first 4 b ytes).

(1). Short JA 122 & JA 124 for 1 second and release to switch to the ser vice

(2). The initial data are preset as listed in page 4, 5, & 6.

(3). Make sure the data need modify or not (Initial data).

for the FIRST TIME, make sure to short JA 122 & JA 124 to switch to the

service mode position first and then turn on the main power switch (See 2-(1)

above).

Note: Once the chassis has been assembly together and ready to be POWER ON

Precaution: If haven’t done this initiation, it may possibly generate excessive

IX3368CEN0 Attachment)

3. For reference please check with memory map (UA1 Series type RH-

IMPORTANT SERVICE NOTES

Maintenance and repair of this receiver should be done by quali-

fied service personnel only.

after discharging the high voltage completely.

1. Picture tube in this receiver employs integral implosion protection.

2. Replace with tube of the same type number for continued safety.

3. Do not lift picture tube by the neck.

SERVICE OF HIGH VOLTAGE SYSTEM AND PICTURE

TUBE

When servicing the high voltage system, remo ve static c harge from it b y

Connecting a 10K ohm Resistor in series with an insulated wire (such as

a test probe) between picture tube dag and 2nd anode lead. (AC line cor d

should be disconnected from AC outlet.)

4. Handle the picture tube only when wearing shatterproof goggles and

X-RAY

This receiver is designed so that any X-Ray radiation is kept to an abso-

lute Minimum. Since certain malfunctions or servicing may produce po-

µA) in the case of the set. The set has

µA) for the set.

± 1.5kV (at beam 1100

been factory - Adjusted to the above-mentioned high voltage.

the repairs, ne ver forget to chec k for such high v oltage after the work.

24.5kV

more than 28.7kV (at beam 0

∴ If there is a possibility that the high voltag e fluctuates as a result of

2. T o keep the set in a normal operation , be sure to make it function on

1. When repairing the circuit, be sure not to increase the high v oltage to

tentially hazardous radiation with prolonged exposure at close range ,

the following precautions should be observed:

which may cause excess X-ray radiation.

3. Do not substitute a picture tube with unauthorized types and/or brands

BEFORE RETURNING THE RECEIVER

Before returning the receiver to the user , perf orm the follo wing safety

checks.

3

that hardware is not lodged between the chassis and other metal parts

in the receiver.

1. Inspect all lead dress to make certain that leads are not pinched or

sulating fishpapers, cabinet bac ks, adjustment and compartment cov-

ers or shields, isolation resistor -capacity netw orks, mechanical insu-

lators etc.

2. Inspect all protective devices such as non-metallic contr ol knobs, in-

20GT-15

ADJUSTMENT PRECAUTION

This model’s setting are adjusted in two diff erent w ays: through the I2C bus control and

in the conventional analog manner. The adjustments via the I2C bus control include

preset-only items and variable data.

Beam current.

mode position, and the microprocessor is in input mode. (Adjustment through

the I2C bus control). (Use JWS Key to set as well).

the mode one by one.

reversibly one by one.

modified.

(OFF) position, and the microprocessor is in out of the service mode.

(1). Short JA 122 & JA 124 for 1 second and release to switch to the ser vice

1. Setting the service mode by the microprocessor.

(2). Press the CH DOWN / UP k ey on the remote controller to get ready to select

(3). Press the CH DOWN / UP key on the remote controller to select the modes

(4). Using the VOLUME UP/ DO WN ke y on the remote controller , the data can be

(5). Short JA 122 & JA 124 for 1 second and release to s witch to the normal mode

2. Factory Presetting.

mode position and turn on the main power switch. Initial values are automati-

cally preset, only when a new EEPROM is used (Judge with the first 4 b ytes).

(1). Short JA 122 & JA 124 for 1 second and release to switch to the ser vice

(2). The initial data are preset as listed in page 4, 5, & 6.

(3). Make sure the data need modify or not (Initial data).

for the FIRST TIME, make sure to short JA 122 & JA 124 to switch to the

service mode position first and then turn on the main power switch (See 2-(1)

above).

Note: Once the chassis has been assembly together and ready to be POWER ON

Precaution: If haven’t done this initiation, it may possibly generate excessive

IX3368CEN0 Attachment)

3. For reference please check with memory map (UA1 Series type RH-

IMPORTANT SERVICE NOTES

Maintenance and repair of this receiver should be done by quali-

fied service personnel only.

after discharging the high voltage completely.

1. Picture tube in this receiver employs integral implosion protection.

2. Replace with tube of the same type number for continued safety.

3. Do not lift picture tube by the neck.

SERVICE OF HIGH VOLTAGE SYSTEM AND PICTURE

TUBE

When servicing the high voltage system, remo ve static c harge from it b y

Connecting a 10K ohm Resistor in series with an insulated wire (such as

a test probe) between picture tube dag and 2nd anode lead. (AC line cor d

should be disconnected from AC outlet.)

4. Handle the picture tube only when wearing shatterproof goggles and

X-RAY

This receiver is designed so that any X-Ray radiation is kept to an abso-

lute Minimum. Since certain malfunctions or servicing may produce po-

µA) in the case of the set. The set has

µA) for the set.

± 1.5kV (at beam 1100

been factory - Adjusted to the above-mentioned high voltage.

the repairs, ne ver forget to chec k for such high v oltage after the work.

24.5kV

more than 28.7kV (at beam 0

∴ If there is a possibility that the high voltag e fluctuates as a result of

2. T o keep the set in a normal operation , be sure to make it function on

1. When repairing the circuit, be sure not to increase the high v oltage to

tentially hazardous radiation with prolonged exposure at close range ,

the following precautions should be observed:

which may cause excess X-ray radiation.

3. Do not substitute a picture tube with unauthorized types and/or brands

BEFORE RETURNING THE RECEIVER

Before returning the receiver to the user , perf orm the follo wing safety

checks.

3

that hardware is not lodged between the chassis and other metal parts

in the receiver.

1. Inspect all lead dress to make certain that leads are not pinched or

sulating fishpapers, cabinet bac ks, adjustment and compartment cov-

ers or shields, isolation resistor -capacity netw orks, mechanical insu-

lators etc.

2. Inspect all protective devices such as non-metallic contr ol knobs, in-

20GT-15

FORWARD : CH DOWN key

REVERSE : CH UP key

AGC &

GEOMETRIC

MODE

WHITE POINT

ADJ

MODE

SUB

ADJ

MODE

AGC &

GEOMETRIC

MODE

WHITE POINT

ADJ

MODE

SUB

ADJ

MODE

MISC.

OPTION

MODE

Y-DELAY

ADJ

MODE

IC

OPTION

MODE

OFFSET

ADJ

MODE

AGC TAKE OVER POINT (AGC)

VERTICAL SLOPE (V-LIN)

VERTICAL AMP (V-AMP)

VERTICAL SHIFT (V-CENT)

HORIZONTAL SHIFT (H-CENT)

S-CORRECTION (S-COR)

W.P. RED STD. W.T. (DRI-RS)

W.P. GREEN STD. W.T. (DRI-GS)

W.P. BLUE STD. W.P. (DRI-BS)

W.P. RED COOL. W.P. (DRI-RC)

W.P. GREEN COOL. W.P. (DRI-GC)

W.P. BLUE COOL. W.P. (DRI-BC)

W.P. RED WARM. W.P. (DRI-RW)

W.P. GREEN WARM. W.P. (DRI-GW)

W.P. BLUE WARM. W.P. (DRI-BW)

MAX VOLUME (SUB-VOL)

SUB CONTRAST (SUB-CON)

SUB COLOUR (SUB-COL)

SUB BRIGHTNESS (SUB-BRI)

SUB TINT (SUB-TINT)

SUB SHARPNESS (SUB-SHP)

MAX HOTEL VOLUME (HTL-VOL)

HOTEL PROGRAM NO (HTL-PRG)

OSD GRB REFERENCE (RGB)

BLACK LEVEL OFFSET R (CUT-R)

BLACK LEVEL OFFSET G (CUT-G)

CATHODE DRIVE LEVEL (CDL)

FORWARD : CH DOWN key

REVERSE : CH UP key

* ( ) means OSD display.

SERVICE MODE

1) In the Service Mode, Key is used to select the mode in the following order.

Input 1, 3, 7, 9 by R/C key.

for hotel mode.

#1 Ch 1 is your selected channel

UA1 HOTEL MODE APPLICATION

How to enable/disable the “Hotel Mode” ?

ond press the (one/two digit) key and k eep pressing it for five second, then y ou can

Ans: a) Press the R/C (FUNCTION) key until language selection appear, within five sec-

see the hotel mode with four digits password.

mode will be enable, you can switch on/off the hotel mode by using R/C (volume

up/down) key.

b) Key in the four digits password starting with number “1”, “3”, “7”, “9”, then the hotel

HOTEL ON Set vol up/down by R/C key.

PASSWORD * * * *

Before set the hotel mode, it is better to choose ch 1 & set s-v ol lev el up to 75% full scale.

After set hotel mode, starting channel will be always ch 1 & maximum sound lev el out will

* We recommend

be set the half of full scale.

* If you set hotel mode in AV, starting channel will be the last ch which you received before

power off (same as normal operation)

When using hotel mode, user can control “contrast”, “brightness”, “sharpness” and “tint”

function.

But after power off, it will return to the initial setting.

CONDITION:

You can’t use: --

4

Preset mode

Fine tuning

Skip mode

System selection

The others function is allowed to be used.

20GT-15

Y-DELAY

ADJ

MODE

OFFSET

ADJ

MODE

IC

OPTION

MODE

Y-D TIME FOR PAL (TV) (DL-PT)

Y-D TIME FOR SECAM (TV) (DL-ST)

Y-D TIME FOR N358 (TV) (DL-3T)

Y-D TIME FOR N443 (TV) (DL-4T)

Y-D TIME FOR B/W (TV) (DL-TV)

Y-D TIME FOR PAL (AV) (DL-PA)

Y-D TIME FOR SECAM (AV) (DL-SA)

Y-D TIME FOR N358 (AV) (DL-3A)

Y-D TIME FOR N443 (AV) (DL-4A)

Y-D TIME FOR B/W (AV) (DL-AV)

COLOUR OFFSET (PAL) (COL-OP)

COLOUR OFFSET (SECAM) (COL-OS)

COLOUR OFFSET (NTSC358) (COL-O3)

COLOUR OFFSET (NTSC443) (COL-O4)

SHARPNESS OFFSET (PAL) (SHP-OP)

SHARPNESS OFFSET (SECAM) (SHP-OS)

SHARPNESS OFFSET (NTSC358) (SHP-O3)

SHARPNESS OFFSET (NTSC443) (SHP-O4)

MISC.

OPTION

MODE

SOUND SYSTEM M (S-M)

SOUND SYSTEM DK (S-DK)

SOUND SYSTEM I (S-I)

SOUND SYSTEM BG (S-BG)

PLAYBACK SECAM (P-SECAM)

FF (RF) NTSC 3.58 (F-N358)

FF (RF) NTSC 4.43 (F-N443)

FF (RF) SECAM (F-SECAM)

VIDEO MUTE AT IDENT LOSS (VMI)

VIDEO MUTE AT PROGRAM

/SOURCE CHANGE (VMC)

HOTEL MODE (HTL)

REDUCED FM DEMODULATION

GAIN FOR BTSC SIGNAL (BTSC)

VERTICAL SCAN DISABLE (VSD)

BLACK STRETCH (BKS)

AUTO VOLUME LEVELING (AVL)

FAST FILTER IF-PLL (FFI)

ENABLE VERTICAL GUARD (EVG)

EHT TRACKING MODE (EHT)

OVERSCAN SWITCH OFF (OSO)

AUTO COLOUR LIMIT (ACL)

FORCED COLOUR LIMIT (FCO)

A

NUMBER OF EXT AV SOURCE (AV)

FM WINDOW SEVECTION (FMWS)

SOUND MUTE BIT 0 (SM0)

SOUND MUTE BIT 1 (SM1)

THAI LANGUAGE (THA)

ARABIC LANGUAGE (ARA)

MALAY LANGUAGE (MAL)

CHINESE LANGUAGE (CHI)

FRENCH LANGUAGE (FRE)

RUSSIAN LANGUAGE (RUS)

FORCED V-SYNC SLICING LEVEL (FSL)

SYNC OF OSD (HP2)

TUNER CPT (CPT)

B

A

BILINGUAL (BIL)

IF AGC SPEED BIT 0 (AGC 0)

IF AGC SPEED BIT 1 (AGC1)

FOA Time Constant-RF (FOA-FE)

FOB Time Constant-RF (FOB-FE)

FOA Time Constant-AV (FOA-AV)

FOB Time Constant-AV (FOB-AV)

B

*(Y-D : Y-DELAY)

The flow of Mode lists as following

Direct Key-in Step 1 Mode

RC COMMAND SERVICE-ITEM

FUNCTION AGC

CONTRAST DOWN V-LIN

COLOUR DOWN V-AMP

BRIGHTNESS DOWN V-CENT

TINT DOWN H-CENT

SHARPNESS DOWN EW//

SYSTEM HB

BLUEBACK S-COR

TIMER SUB-VOL

CONTRAST UP SUB-CON

COLOUR UP SUB-COL

BRIGHTNESS UP SUB-BRI

TINT UP TINT SUB-TINT

SHARPNESS UP SUB-SHP

CHANNEL 1 DRI-GS

CHANNEL 4 DRI-BS

CHANNEL 7 CUT-R

CHANNEL FLASHBACK

CUT-G

5

20GT-15

FIX/ADJ REMARK

DATA LENGTH INITIAL DATA

0 FIX

1 FIX

0 FIX

1 FIX ONLY BLK

1 FIX

0 FIX

0(DISABLE)/1(ENABLE)

0 FIX

1 FIX *3

1 FIX

1 FIX *3

0(DISABLE)/1(ENABLE)

0 FIX

1 FIX *4

1 FIX *5

1 FIX

0 FIX

0(DISABLE)/1(ENABLE)

1 ADJ *6

0 FIX

1 FIX

0 FIX

0 FIX *7

1 FIX *3

0(DISABLE)/1(ENABLE)

0 FOR1 AV/1 FOR 2AV

0(DISABLE)/1(ENABLE)

1 FIX *3

0 FIX

0(DISABLE)/1(ENABLE)

0 ADJ *8

1 FIX

0 FIX

1 FIX

0(DISABLE)/1(ENABLE)

EEPROM ITEMS OSD

VERTICAL SCAN DISABLE VSD

EVG

BLACK STRETCH BKS

AUTOMATIC VOLUME LEVELING AVL

FAST FILTER IF-PLL FFI

ENABLE VERTICAL GU ARD (RGB BLANKING)

EHT TRACKING MODE (HCO) EHT

OVERSCAN SWITCH OFF OSO

VMC

BTSC

IF 2 AV-OUT, SET ‘1’

*1: UNLESS CUSTOMER REQUEST, OR ELSE FIX THE ADJUSTMENT.

*2: CDL DATA=2 , FOR 20” & 21” ONLY

*3: MANUAL CHANGE TO ‘0’

*4: MANUAL CHANGE TO ‘0’

*5: MANUAL CHANGE TO ‘0’

*6: IF 1 AV-OUT, SET TO ‘0’

*7: MANUAL CHANGE TO ‘1’

*8: IF BILINGUAL MODEL PLEASE CHANGE TO ‘1’

AUTO COLOUR LIMIT ACL

FORCED COLOUR LIMIT FCO

SOUND SYSTEM M S-M

SOUND SYSTEM DK S-DK

SOUND SYSTEM I S-I

SOUND SYSTEM BG S-BG

PLAYBACK SECAM P-SECAM

FE (RF) NTSC 3.58 F-N358

FE (RF) NTSC 4.43 F-N443

FE (RF) SECAM F-SECAM

VIDEO MUTE AT IDENT LOSS VMI

VIDEO MUTE AT PROGRAM/SOURCE CHANGE

HOTEL MODE HTL

REDUCED FM DEMODULATOR GAIN FOR BTSC SIGNAL

NUMBER OF EXTERNAL AV SOURCE AV

FM WINDOW SELECTION FMWS

SOUND MUTE BIT 0 SM0

SOUND MUTE BIT 1 SM1

THAI LANGUAGE THA

ARABIC LANGUAGE ARA

MALAY LANGUAGE MAL

CHINESE LANGUAGE CHI

FRENCH LANGUAGE FRE

RUSSIAN LANGUAGE RUS

FORCED V-SYNC SLICING LEVEL FSL

SYNC OF OSD HP2

TUNER CPT CPT

BILINGUAL BIL

IF AGC SPEED BIT 0 AGC0

IF AGC SPEED BIT 1 AGC1

PHI-1 TIME CONSTANT (RF) FOA-FE

PHI-1 TIME CONSTANT (RF) FOB-FE

PHI-1 TIME CONSTANT (OFF AIR) FOA-AV

PHI-1 TIME CONSTANT (OFF AIR) FOB-AV

NOTE :

FIXED DATA, PLEASE DO NOT CHANGE WITHOUT SPECIFIC INSTRUCTION.

FIX/ADJ REMARK

255 FIX

00H: 55H 02H: 43H

01H: 4FH 03H: A1H

ADDRESS DATA ADDRESS DATA

AFTER SHORT JA 122 & JA 124, AND TURN ON THE MAIN POWER SWITCH, READ

DA TA

FROM EEPROM ADDRESS 00H ~ 03H, AND COMPARE TO THE LIST BELOW, IF

DIFFERENT, INITIALIZE THE EEPROM.

DATA LENGTH INITIAL DATA

EEPROM ITEMS OSD

AGC TAKE OVER POINT AGC 0~63 14 ADJ

VERTICAL SLOPE V-LIN 0~63 32 ADJ

VERTICAL AMPLITUDE V-AMP 0~63 32 ADJ

VERTICAL SHIFT V-CENT 0~63 32 ADJ

HORIZONTAL SHIFT H-CENT 0~63 32 ADJ

S-CORRECTION S-COR 0~63 0 FIX

WHITE POINT RED STD WHITE TEMP DRI-RS 0~63 32 FIX

WHITE POINT GREEN STD WHITE TEMP DRI-GS 0~63 32 ADJ

WHITE POINT BLUE STD WHITE TEMP DRI-BS 0~63 32 ADJ

WHITE POINT RED WARM WHITE TEMP DRI-RW 0~63 32 FIX

0~99 OR>99FOR NONE

WHITE POINT GREEN WARM WHITE TEMP DRI-GW 0~63 32 FIX (DRI-GS)-7 DATA

WHITE POINT BLUE WARM WHITE TEMP DRI-BW 0~63 32 FIX (DRI-BS)-7 DATA

WHITE POINT RED COOL WHITE TEMP DRI-RC 0~63 25 FIX (DRI-BS)-7 DATA

WHITE POINT GREEN COOL WHITE TEMP DRI-GC 0~63 32 FIX (DRI-GS)-7 DATA

WHITE POINT BLUE COOL WHITE TEMP DRI-BC 0~63 32 FIX (DRI-BS) SAME DATA

MAX VOLUME SUB-VOL 0~63 63 FIX

SUB CONTRAST SUB-CON 0~63 63 FIX

SUB COLOUR SUB-COL 0~63 32 ADJ

SUB BRIGHTNESS SUB-BRI 0~63 32 ADJ

SUB TINT SUB-TINT 0~63 32 ADJ

SUB SHARPNESS SUB-SHP 0~63 32 FIX

MAX HOTEL VOLUME HTL-VOL 0~63 32 FIX *1

HOTEL PROGRAM NUMBER HTL-PRG

OSD GRB REFERENCE RGB 0~15 15 FIX

BLACK LEVEL OFF-SET R CUT-R 0~15 8 FIX

BLACK LEVEL OFF-SET B CUT-G 0~15 8 FIX

CATHODE DRIVE LEVEL CDL 0~15 0 FIX *2

Y-DELAY TIME FOR PAL(TV) [YD] DL-PT 0~15 12 FIX

Y-DELAY TIME FOR SECAM(TV) [YD] DL-ST 0~15 15 FIX

Y-DELAY TIME FOR N358 (TV) [YD] DL-3T 0~15 12 FIX

Y-DELAY TIME FOR N443 (TV) [YD] DL-4T 0~15 12 FIX

Y-DELAY TIME FOR B/W (TV) [YD] DL-TV 0~15 12 FIX

Y-DELAY TIME FOR PAL (AV) [YD] DL-PA 0~15 12 FIX

Y-DELAY TIME FOR SECAM (AV) [YD] DL-SA 0~15 15 FIX

Y-DELAY TIME FOR N358 (AV) [YD] DL-3A 0~15 12 FIX

Y-DELAY TIME FOR N443 (AV) [YD] DL-4A 0~15 12 FIX

Y-DELAY TIME FOR B/W (AV) [YD] DL-AV 0~15 12 FIX

COLOUR OFFSET (PAL) COL-OP 0~15 8 FIX

COLOUR OFFSET (SECAM) COL-OS 0~15 8 FIX

COLOUR OFFSET (NTSC358) COL-O3 0~15 4 FIX

COLOUR OFFSET (NTSC443) COL-O4 0~15 4 FIX

SHARPNESS OFFSET (PAL) SHP-OP 0~15 8 FIX

SHARPNESS OFFSET (SECAM) SHP-OS 0~15 4 FIX

SHARPNESS OFFSET (NTSC358) SHP-O3 0~15 12 FIX

SHARPNESS OFFSET (NTSC443) SHP-O4 0~15 8 FIX

6

20GT-15

PIF ADJUSTMENT CHECKING

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

Fig. 1

Fig. 2

Fig. 3-1

OSCILLOSCOPE

BIAS BOX

TV SET

Bias Box : about 4.5V

TP201

0.1V

E-9 CH

P C

-1.5+/-0.8dB

10k

100k

1n60

75ohm

IF OUT

1000p

Oscilloscope

NO

Tuner IFT

( PRESET )

(1) Get the tuner ready to receive the CH. E - 9

signal, but with no signal input. Adjust the PLL

data.

(2) Connect the sweep generator's output cable to

the tuner antenna. (RF SWEEP)

(3) Adjust the sweep generator's to 80dBuV.

(4) Connect the response lead (use LOW

IMPEDANCE probe with wave detector ; see

Fig.1) to the tuner's IF output terminal.

(This terminal must have the probe alone

connected ).

(5) Set the RF AGC to 0 - 6 V with no saturation

with the waveform.

(6) Adjust the tuner IF coil to obtain the waveform

as shown in Fig. 2.

Note : Be sure to keep the tuner cover in position

during this adjustment.

2 RF-AGC

TAKE OVER

POINT

ADJUSTMENT

(I2C BUS

CONTROL)

(1) Receive "PAL COLOR BAR" signal. Signal

Strength: 57 ± 1dBµV (75 ohm open)

(2) Connect the oscilloscope to TP201 (Tuner's

AGC Terminal) as shown in Fig 3-1.

(3) Call "AG" mode in service mode. Adjust the

"AG" bus data to obtain the Tuner output pin

drop 0.1V below maximum voltage.

(4) Change the antenna input signal to 63 ~

67dBµV, and make sure there is no noise.

(5) Turn up the input signal to 90 ~ 95 dBµB to be

sure that there is no cross modulation beat.

Note : For the 50 ohm signal

strength gauge, when not

using 50/75 impedance

adapter, signal strength is

52 ± 1dBµV (75 ohm

open), instead of 57 ±

1dBµV (75 ohm open).

Precaution : The loss of using

impedance adapter.

+

–

+

–

SHIPPING SETTING & CHECKING

ITEMS DATA SETTING

LAST PROGRAM/CHANNEL 1

FLASHBACK PROGARM/CH 1

DIGIT 1

C-SYSTEM AUTO

S-SYSTEM *1 B/G

SKIP OFF

AFC ON

VOLUME 1

CONTRAST 60 (MAX)

COLOUR 0 (CENTER)

(1) The following default data has been factory-set for the E2PROM.

BRIGHTNESS 0 (CENTER)

TINT 0 (CENTER)

SHARPNESS 0 (CENTER)

WHITE TEMP ST AND ARD

REMINDER TIMER In-active, ”—:—”

ON TIMER In-active, ”—:—”

OFF TIMER In-activ e, ”—:—”

LAST POWER POWER-ON

LANGUAGE *1 THAI

BLUE BACK MUTE OFF

HOTEL MODE OFF

7

*1: PLEASE CHANGE IT BY REMOTE CONTROL

20GT-15

PURITY ADJUSTMENT

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

PURITY ADJ. (1) Receive the GREEN -ONLY signal. Adjust the

beam current to ~700µA (21"&20")/

~500µA(14").

(2) Maintain the purity magnet at the zero

magnetic field and keep the static convergence

roughly adjusted.

(3) Observe the points a, b, as shown in Fig. 1-1

through the microscope. Adjust the landings to

A rank requirement.

(4) Orient the raster rotation to 0 eastward.

(5) Tighten up the deflection coil screws.

Tightening torque : 108N ± 20N (11Kgf ± 2Kgf)

(6) Make sure the CRT corners landing meet the

A rank requirements. If not, stick the magnet

sheet to correct it.

Note : This adjustment must be done after

warming up the unit for 30 minutes or longer

with a beam current over 700µA.

(For 14", the beam current should be over

500µA).

Fig. 1-1

Fig. 1-2 Rank A (On the right of CRT)

Fig. 1-3 Rank A (On the left of CRT)

a

A

A=B

B

A

A=B

B

b

CONVERGENCE ADJUSTMENT

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

CONVERGENC

ADJ (To be

done after the

purity

adjustment.

(1) Receive the "Crosshatch Pattern" signal.

(2) Using the remote controller, call NORMAL

mode.

(Static convergence)

(1) Turn the 4 - pole magnet to a proper opening

angle in order to superpose the blue and red

colours.

(2) Turn the 6 - pole magnet to a proper opening

angle in order to superpose the green colour

over the blue and red colours.

(Dynamic convergence )

(1) Adjust the convergence on the fringes of the

screen in the following steps.

a) Fig. a :

Drive the wedge at point " a " and swing

the deflection coil upward.

b) Fig. b :

Drive the wedge at point " b " and " c " and

swing the deflection coil downward.

c) Fig. c :

Drive the " c " wedge deeper and

swing the deflection coil rightward.

d) Fig. d :

Drive the " b " wedge deeper and swing the

deflection coil leftward.

(2) Fix all the wedges on the CRT and apply glass

tape over them.

(3) Apply lacquer to the deflection yoke lock

screw, magnet unit (purity, 4 - pole, 6 - pole

magnets) and magnet unit lock screw.

Finally received the Red - only and Blue - only

signals to make sure there is no other colours

on the screen.

Fig. a

Fig. b

Fig. c

Fig. d

R G B

CRT NECK

Lacquer

Purity Magnet

4-Pole Magnet

6-Pole Magnet.

20cm

40cm (14")

(21")

B G R

R G B

B G R

R G B

Wedge "a"

Wedge "b"

Wedge "c"

About

100 Deg

About

100 Deg

Lacquer

8

20GT-15

HORIZONTAL, VERTICAL, DEFLECTION LOOP and

FOCUS ADJUSTMENT

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

V-SLOPE

(I2C BUS

CONTROL)

(1) Receive PAL 50Hz Monoscope Pattern Signal

(2) Call the "V-LIN" mode.

(3) Increase or decrease "V-LIN" by Volume key

till the horizontal line in the center of

monoscope is just at the position where the

blanking starts.

2 V-SHIFT

(I2C BUS

CONTROL)

(1) Call the "V-CENT" mode.

(2) Increase or decrease "V-CENT" by Volume

key till the picture is centered.

3 V - AMP

(I2C BUS

CONTROL)

(1) Call the "V-AMP" mode.

(2) Increase or decrease "V - AMP" by Volume

key to set overscan of 8.5% typical.

Adjustment Spec 8.5% range +1% -0%.

4

S-CORRECTION

(I2C BUS

CONTROL)

FIXED DATA, NO NEED TO ADJUST.

5 H- SHIFT (50)

(H - CENTER)

(I2C BUS

CONTROL)

(1) Call the "H-CENT" mode.

(2) Increase or decrease "H-CENT" by Volume

key to center the picture horizontal.

1 Focus (1) Receive the "Monoscope Pattern" signal.

(2) Press R/C to set Picture NORMAL condition.

(3) Adjust the focus control to get the best

focusing.

CUT OFF, BKGD, SUB-CONT ADJUSTMENT.

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

CRT CUTOFF

ADJUSTMENT

(I2C BUS

CONTROL)

(1) Switch TV to VIDEO mode, BLUE BACK

OFF, with NO VIDEO signal.

(2) Press R/C to set Picture Normal condition.

(3) Connect the oscilloscope to Red OUT from

IC801. (TP851)

Range : 1 V/Div (DC)

Sweep : 5 msec/Div

(3) Adjust SCREEN VR, so that the tip of signal

reach 3.0 Vdc ± 0.1 Vdc.

2

SUB-BRIGHTNESS

ADJUSMENT

(I2C BUS

CONTROL)

(1) Call "SUB-BRI" in service mode. (Receive

Crosshatch pattern with 5 black level

windows)

(2) Adjust the "SUB BRIGHT" bus data in order

that the line 1, 2 and 3 have the same

darkness wherelse line 4 is slightly brighter

than line 1, 2 and 3 and finally line 5 will be the

brighter than line 4.

3

WHITE

BALANCE

SERVICE

MODE ADJ

(I2C BUS

CONTROL)

(1) Receive the "WHITE" Pattern with BURST

signal.

(2) Press R/C to set Picture NORMAL condition.

(3) Connect the DC miliammeter between the

TP602 ( - ) TP 603 ( + ).

(4) Check Beam current should be around

1100µA. (20"/21") (14" around 800µA).

(5) Set it to service mode and adjust the DRI-GS,

DRI-BS data to have a colour temperature of

12,300°K . * Note .

(6) Receive "WHITE" pattern, WITH BURST

signal, and set Brightness Y by generator, to

** 10 cd/m2 (Minolta CA-100) by reducing

Luminate Y signal.

(7) Adjust "CUT-R" & "CUT-G" to get 12,300°K.

Then go back normal mode (High Bright**) to

check colour temperature. If out of range, back

to (1).

Note : This adjustment must be done after

warming up the unit for 30 minutes or

longer with a beam current over 700µA.

(For 14", the beam current should be over

500µA).

* ADJUST DRI-GC/GW, DRI-BC/BW AS

FOLLOWING DATA AFTER FINISHING DRI-GS

AND DRI-BS.

DRI-GC/GW DATA = "DRI-GS"-7 DATA

DRI-RC = 25; DRI-BC = DRI-BS;

DRI-RW = 32

DRI-BW DATA = "DRI-BS" -7 DATA

4

Max Beam

Check

(1) Receive the "Monoscope Pattern" signal.

(2) Press R/C to set Picture NORMAL condition.

(3) Connect the DC miliammeter between TP603

( + ) & TP 602 ( - )

(Full Scale: 3mA Range)

(4)

Beam current must be within 1100 ± 100µA (21")

800 ± 100µA (14")

Refer to SHIPPING SETTING &

CHECKING.

# 12300°K X : 0.272

Y : 0.275

(MINOLTA COLOUR ANALYZER

CA-100)

*Note: Above Data can be

UP/DOWN by Volume

key.

Low High

14" 10cd/m2 200cd/m2

20"/21" 10cd/m2 120cd/m2

1 2 3 4 5

3.0Vdc

0

1V

1, 2, 3 are in same black level.

PAL CHROMA ADJUSTMENT

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

SUB COLOUR

(I2C BUS

CONTROL)

(1) Receive the "PAL Colour Bar" signal.

(2) Press R/C to set Picture Normal condition.

(3) Connect the oscilloscope to Red cathode.

(TP854)

Range : 20 V/Div (AC)

(Using 10:1 Probe)

Sweep Time : 10 µsec/Div

(4) Using the R/C call "SUB COL" in SERVICE

mode. Adjust SUB COLOUR bus data, so

that the 75% White & Red portions of PAL

Color Bar be at the same level shown as

Fig. 1-1.

(5) Clear the SERVICE mode.

Fig. 1-1

Cy G B

W Y 100% W Mg R

75%

9

20GT-15

NTSC CHROMA ADJUSTMENT

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

SUB-TINT

(I2C BUS

CONTROL)

(1) Receive the "NTSC 3.58 Color Bar" signal

thru AV in.

(2) Connect the oscilloscope to TP853 (P882 pin5)

BLUE-OUT.

Range : 1V/Div (AC) (Use Probe 10:1)

Sweep time : 10µsec/Div

(3) Call the "SUB-TINT" mode in service mode.

Adjust the "SUB-TINT" bus data to obtain the

waveform shown as Fig. 1-1.

(4) Clear the SERVICE mode.

Fig. 1-1

(B-Y)

SAME LEVEL

W Y Cy G Mg R B

PROTECTOR OPERATION CHECKING

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

BEAM

PROTECTOR

(1) Receive "Monoscope Pattern" signal.

(2) Set CONTRAST MAX.

(3) Set BRIGHT MAX.

(4) During the Collector & Emitter of Q883/5/7

short, make sure the protector ON and switch

to standby mode.

* Select one of Q883/5/7 to do

each short test.

2

H, V

PROTECTOR

(1) Receive "Monoscope Pattern" signal.

(2) Connect output of Bias Box to D607 cathode

(R606 side).

(3) Set voltage of Bias Box to 18V and make

sure the protector is not work.

(4) Set voltage of Bias Box to 27V, and make

sure the protector functions.

3

OTHER

PROTECTOR

(1) Once finish rectified Electrolytic Capacitor

short testing in + B line, check all possible

damaged components on +B line.

(Use random selected set for inspection)

A/V INPUT AND OUTPUT CHECKING

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

VIDEO AND

AUDIO

OUTPUT

CHECK

(1) Receive the "PAL Color Bar" signal (100%

White Color Bar, Sound 400 Hz 100% Mod).

(2) Terminate the Video output with a 75 ohm

impedance. Make sure the output is as

specified (1.0 Vp-p ± 3 dB)

(3) Terminate the Audio output with a 10 Kohm

impedance. Make sure the O/P is as specified

(1.76 Vp-p ± 3 dB)

2

VIDEO AND

AUDIO INPUT

CHECK

(1) Using the TV/AV key on the remote controller,

make sure that the modes change in order of

TV, AV1, AV2 & TV again and the video &

audio output are according to the input

terminal for each mode.

FUNCTION OPERATION CHECKING (1) (VIDEO & AUDIO)

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

1

NO

CONTRAST

Key

(1) Receive "Monoscope Pattern" signal.

(2) Set P-Mode to select CONTRAST.

(3) Press Volume Up/Down key to check whether

the CONTRAST effect is OK or not.

2

COLOUR Key (1) Receive "Color Bar" signal.

(2) Set P-Mode to select COLOUR.

(3) Press Volume Up/Down key to check whether

the COLOUR effect is OK or not.

3

BRIGHTNESS

Key

(1) Receive "Monoscope Pattern" signal.

(2) Set P-Mode to select BRIGHTNESS.

(3) Press Volume Up/Down key to check whether

the BRIGHTNESS effect is OK or not.

4

TINT Key (1) Receive the "NTSC Colour Bar" signal thru AV

in.

(2) Set P-Mode to select TINT.

(3) Press Volume Up/Down key to check TINT,

UP for GREEN direction and DOWN for

PURPLE direction whether is OK or not.

5

SHARPNESS

Key

(1) Receive "Monoscope Pattern" signal.

(2) Set P-mode to select SHARPNESS.

(3) Press Volume Up/Down key to check whether

the SHARPNESS effect is OK or not.

6

CH DISPLAY

COLOUR

(1) All Ch (1~99) will have an OSD display of the

channel number in green colour under AFT

ON condition.

7

NORMAL Key (1) Once in PICTURE Mode, and the NORMAL

key is pressed, all the settings will be present

to normal setting.

(Normal setting value for every mode).

CONTRAST : MAX

COLOUR : CENTER

BRIGHTNESS : CENTER

TINT : CENTER

SHARPNESS : CENTER

8

WHITE TEMP (1) Receive "Monoscope Pattern" signal.

(2) Set FUNCTION to select WHITE TEMP.

(3) Press Volume Up/Down key to check WHITE

TEMP Option, STANDARD: NORMAL

SETTING, WARM for more REDDISH

direction changing, COOL for more BLUISH

direction changing.

9

COLOUR

SYSTEM

(1) Receive the "PAL COLOUR BAR" signal,

press the COLOUR SYSTEM key to select

modes except PAL, check the COLOUR is not

working properly. Then, select the "PAL" mode.

Check again its colour so that it is working

properly.

(2) Receive "NTSC 4.43/3.58 COLOUR BAR"

signal thru AV, press COLOUR SYSTEM key

to select modes except N4.43/3.58, check the

COLOUR is not working properly. Then, select

the "NTSC 4.43/3.58" mode. Check again its

colour so that it is working properly.

10

20GT-15

FUNCTION OPERATION CHECKING (2) (VIDEO & AUDIO)

ADJUSTMENT POINT

ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS

10

NO

SOUND

SYSTEM

(1) Receive "PAL-B/G" signal, check the sound

output is working properly or not.

11

NOISE

MUTE

CHECKING

(1) Receive "PAL COLOUR BAR" signal.

(2) Turn up the volume control to maximum,

make sure the sound is heard from the

speakers. Then put the unit in no signal

state.

(3) Check the sound mute is effective.

(4) Finally turn sound level of CTV to minimum.

12

OSD

LANGUAGE

QUANTITY

CHECK

Check OSD LANGUAGE quantity and type.

11

20GT-15

MEMORY MAP

MODEL : PROCESS

EEPROM CHECK DATA LIST 1

SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)

ADDRESS

(HEX)

00 01 02 03 04 05 06 07 08

09 0A 0B 0C 0D 0E

0F

10

11

12

13

14

15

16

17

18

19 1A 1B 1C 1D 1E

1F

20

21

22

23

24

25

26

27

28

29 2A 2B 2C 2D 2E

2F

30

31

32

33

34

35

36

37

38

39 3A 3B 3C 3D 3E

3F

40

41

42

43

44

FCO

ACL

45

SCM 46 47 48 49

4A 4B 4C 4D 4E

4F 50 51 52 53 54 55 56 57

HP2

MODEL

SM

N443

FSL

OSO

N358

FMWS

RUS

DATA

PASS WORD PASS WORD PASS WORD PASS WORD

AGC TAKE-OVER

EW-PARALLELOGRAM EW-PARABOLA/WIDTH

EW-UPPER CORNER EW-LOWER CORNER

EW-TRAPEZIUM

HORIZONTAL-BOW

S-CORRECTION

DRIVE-R (STANDARD)

DRIVE-G (STANDARD)

DRIVE-B (STANDARD)

DRIVE-R (WARM) DRIVE-G (WARM) DRIVE-B (WARM)

DRIVE-R (COOL) DRIVE-G (COOL) DRIVE-B (COOL)

SUB-CONTRAST

SUB-BRIGHTNESS

SUB-SHARPNESS

HTL-POSITION FF

EHT

PB-SEC

POSITION/AV1/AV2

AV

FRA

FAV-POS A FAV-POS B

BTSC

D2 D1 D0

V-SLOPE

V-AMPLITUDE

V-CENTER

H-CENTER

H-SIZE

SUB-VOLUME SUB-COLOUR

SUB-TINT

HTL-VOLUME

OSD-REFERENCE CUTOFF LEVEL-OFFSET R CUTOFF LEVEL-OFFSET B

CATHODE DRIVE LEVEL

Y-DELAY (TV PAL)

Y-DELAY (TV SECAM)

Y-DELAY (TV N358) Y-DELAY (TV N443)

Y-DELAY (TV BW)

Y-DELAY (AV PAL)

Y-DELAY (AV SECAM)

Y-DELAY (AV N443) Y-DELAY (AV N358)

Y-DELAY (AV BW)

COLOUR-OFFSET (PAL)

COLOUR-OFFSET (SECAM)

COLOUR-OFFSET (N443) COLOUR-OFFSET (N358)

SHARPNESS-OFFSET (PAL)

SHARPNESS-OFFSET (SECAM)

SHARPNESS-OFFSET (N443) SHARPNESS-OFFSET (N358)

EVG

FFI

HTL MLY

AVL

I

DK

VMC

ARB

BG

CHN

AGC BIL OBA

VOLUME

CONTRAST

COLOUR

BRIGHTNESS

TINT

SHARPNESS

BKS

VMI

THA

M

TV MICOM ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

MICON

EEPROM

DEFAULT

RANGE

55

00-FF 4F 00-FF 43 00-FF A1 00-FF

00-3F

0E

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

00

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

19

00-3F

20

00-3F

20

00-3F

3F

00-3F

3F

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-3F

20

00-FF

00-0F

0F

00-0F

08

00-0F

08

00-0F

00

00-0F

0C

00-0F

0F

00-0F

0C

00-0F

0C

00-0F

0C

00-0F

0C

00-0F

0F

00-0F

0C

00-0F

0C

00-0F

0C

00-0F

08

00-0F

08

00-0F

04

00-0F

04

00-0F

08 04 00-0F 0C 00-0F 08 00-0F

00-FF

01

00-3C

3C

00-3C

1E

00-3C

1E

00-3C 1E 00-3C 1E 00-3C

01 00-FF

0A1400-FF

00-FF

MODEL

ISSUED DATE :

MANAGER

ENGINEER

EEPROM WRITE(CPU)

CHECK DATA CHECK TYPE

TV DESIGN ENGINEERING

CHIEF

CHASSIS

CHECK DATA CHECK TYPE

TV PRODUCTION ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

CTV FINAL

LAST INITIAL

SETTING DATA

REMARKD7 D6 D5 D4 D3

LETTER NO.

12

MEMORY MAP (Continued)

20GT-15

MODEL : PROCESS

EEPROM CHECK DATA LIST 2

SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)

ADDRESS

(HEX)

58

59 5A 5B 5C 5D 5E

5F

60

61

62

63

64

65

66

67

68

69 6A 6B 6C 6D 6E

6F

70

71

72

73

74

75

76

77

78

79 7A 7B 7C 7D 7E

7F

80

81

82

83

84

85

86

87

88

89 8A 8B 8C 8D 8E

8F

90

91

92

93

94

95

96

97

98

99 9A 9B 9C 9D 9E

9F A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF

SKIP 0

SKIP 8 SKIP 16 SKIP 24 SKIP 32 SKIP 40 SKIP 48 SKIP 56 SKIP 64 SKIP 72 SKIP 80 SKIP 88 SKIP 96

MODEL

SKIP 1

SKIP 2

SKIP 9

SKIP 10

SKIP 17

SKIP 18

SKIP 25

SKIP 26

SKIP 33

SKIP 34

SKIP 41

SKIP 42

SKIP 49

SKIP 50

SKIP 57

SKIP 58

SKIP 65

SKIP 66

SKIP 73

SKIP 74

SKIP 81

SKIP 82

SKIP 89

SKIP 90

SKIP 97

SKIP 98

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

DATA

FAV-POS C FAV-POS D

POWER

WHITE-TEMP

BLUE BACK LANGUAGE

DIGIT

SKIP 3 SKIP 11 SKIP 19 SKIP 27 SKIP 35 SKIP 43 SKIP 51 SKIP 59 SKIP 67 SKIP 75 SKIP 83 SKIP 91 SKIP 99

SKIP 4 SKIP 12 SKIP 20 SKIP 28 SKIP 36 SKIP 44 SKIP 52 SKIP 60 SKIP 68 SKIP 76 SKIP 84 SKIP 92

D2 D1 D0

SKIP 5

SKIP 6

SKIP 13

SKIP 14

SKIP 21

SKIP 22

SKIP 29

SKIP 30

SKIP 37

SKIP 38

SKIP 45

SKIP 46

SKIP 53

SKIP 54

SKIP 61

SKIP 62

SKIP 69

SKIP 70

SKIP 77

SKIP 78

SKIP 85

SKIP 86

SKIP 93

SKIP 94

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

TV MICOM ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

MICON

EEPROM

DEFAULT

1E 28

00 00-01 00 00 00 00

SKIP 7 SKIP 15 SKIP 23 SKIP 31 SKIP 39 SKIP 47 SKIP 55 SKIP 63 SKIP 71 SKIP 79 SKIP 87 SKIP 95

C-SYSAFTS-SYS

80 00 00 00 00 00 00 00 00 00 00 00 00

RANGE

00-FF 00-FF

00-02 00-01 00-07 00-01

00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF 00-FF

MODEL

WRITE(CPU)

TV DESIGN ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

CHECK DATA CHECK TYPE

S-SYS

000:BG

001:I

010:DK

011:M

AFT

0:OFF

1:ON

CHASSIS

TV PRODUCTION ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

CTV FINAL

CHECK DATA CHECK TYPE

SETTING DATA

LAST INITIAL

REMARKD7 D6 D5 D4 D3

POS 0

POS 1

POS 2

POS 3

POS 4

POS 5

POS 6

POS 7

POS 8

POS 9

POS 10

POS 11

POS 12

POS 13

POS 14

POS 15

POS 16

POS 17

POS 18

POS 19

LETTER NO.

13

20GT-15

MEMORY MAP (Continued)

MODEL : PROCESS

EEPROM CHECK DATA LIST 3

SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)

ADDRESS

(HEX)

BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF

EA EB EC ED EE EF

FA FB FC FD FE

100 101 102 103 104 105 106 107

B0 B1 B2 B3 B4 B5 B6 B7 B8 B9

E0 E1 E2 E3 E4 E5 E6 E7 E8 E9

F0 F1 F2 F3 F4 F5 F6 F7 F8 F9

FF

MODEL

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

DATA

D2 D1 D0

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

TV MICOM ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

MICON

EEPROM

DEFAULT

C-SYSAFTS-SYS

RANGE

MODEL

WRITE(CPU)

TV DESIGN ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

S-SYS POS 0

CHASSIS

CHECK DATA CHECK TYPE

TV PRODUCTION ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

CTV FINAL

CHECK DATA CHECK TYPE

SETTING DATA

LAST INITIAL

REMARKD7 D6 D5 D4 D3 POS 20

POS 21

POS 22

POS 23

POS 24

POS 25

POS 26

POS 27

POS 28

POS 29

POS 30

POS 31

POS 32

POS 33

POS 34

POS 35

POS 36

POS 37

POS 38

POS 39

POS 40

POS 41

POS 42

POS 43

POS 44

POS 45

POS 46

POS 47

POS 48

POS 49

LETTER NO.

14

MEMORY MAP (Continued)

20GT-15

MODEL : PROCESS

EEPROM CHECK DATA LIST 4

SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)

ADDRESS

(HEX)

108 109 10A 10B 10C 10D 10E 10F 110 111 112 113 114 115 116 117 118 119 11A 11B 11C 11D 11E 11F 120 121 122 123 124 125 126 127 128 129 12A 12B 12C 12D 12E 12F 130 131 132 133 134 135 136 137 138 139 13A 13B 13C 13D 13E 13F 140 141 142 143 144 145 146 147 148 149 14A 14B 14C 14D 14E 14F 150 151 152 153 154 155 156 157 158 159 15A 15B 15C 15D 15E 15F

MODEL

TUNING FREQUANCY (LOWER PART) TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

DATA

D2 D1 D0

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

TV MICOM ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

MICON

EEPROM

DEFAULT

C-SYSAFTS-SYS

RANGE

MODEL

WRITE(CPU)

TV DESIGN ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

S-SYS POS 0

CHASSIS

CHECK DATA CHECK TYPE

TV PRODUCTION ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

CTV FINAL

CHECK DATA CHECK TYPE

SETTING DATA

LAST INITIAL

REMARKD7 D6 D5 D4 D3

POS 50

POS 51

POS 52

POS 53

POS 54

POS 55

POS 56

POS 57

POS 58

POS 59

POS 60

POS 61

POS 62

POS 63

POS 64

POS 65

POS 66

POS 67

POS 68

POS 69

POS 70

POS 71

POS 72

POS 73

POS 74

POS 75

POS 76

POS 77

POS 78

LETTER NO.

15

20GT-15

MEMORY MAP (Continued)

MODEL : PROCESS

EEPROM CHECK DATA LIST 5

SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)

ADDRESS

(HEX)

160 161 162 163 164 165 166 167 168 169 16A 16B 16C 16D 16E 16F 170 171 172 173 174 175 176 177 178 179 17A 17B 17C 17D 17E 17F 180 181 182 183 184 185 186 187 188 189 18A 18B 18C 18D 18E 18F 190 191 192 193 194 195 196 197 198 199 19A 19B 19C 19D 19E 19F 1A0 1A1 1A2 1A3 1A4 1A5 1A6 1A7 1A8 1A9 1AA 1AB 1AC 1AD 1AE 1AF 1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7

MODEL

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART)

TUNING FREQUANCY (LOWER PART)

TUNING FREQUANCY (HIGHER PART) TUNING FREQUANCY (LOWER PART)

DATA

D2 D1 D0

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

(auto)

(auto) C-SYSAFTS-SYS

(auto) C-SYS

C-SYSAFTS-SYS

TV MICOM ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

MICON

EEPROM

DEFAULT

RANGE

MODEL

TV DESIGN ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

S-SYS POS 0

WRITE(CPU)

CHASSIS

CHECK DATA CHECK TYPE

TV PRODUCTION ENGINEERING ISSUED DATE : MANAGER

CHIEF

ENGINEER

CTV FINAL

CHECK DATA CHECK TYPE

SETTING DATA

LAST INITIAL

REMARKD7 D6 D5 D4 D3

POS 79

POS 80

POS 81

POS 82

POS 83

POS 84

POS 85

POS 86

POS 87

POS 88

POS 89

POS 90

POS 91

POS 92

POS 93

POS 94

POS 95

POS 96

POS 97

POS 98

POS 99

AV1

AV2

LETTER NO.

16

MEMORY MAP (Continued)

20GT-15

MODEL : PROCESS

EEPROM CHECK DATA LIST 6

SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)

ADDRESS

(HEX)

1B8 1B9 1BA 1BB 1BC 1BD 1BE 1BF 1C0 1C1 1C2 1C3 1C4 1C5 1C6 1C7 1C8 1C9 1CA 1CB 1CC 1CD 1CE 1CF 1D0 1D1 1D2 1D3 1D4 1D5 1D6 1D7 1D8 1D9 1DA 1DB 1DC 1DD 1DE 1DF 1E0 1E1 1E2 1E3 1E4 1E5 1E6 1E7 1E8 1E9 1EA 1EB 1EC 1ED 1EE 1EF 1F0 1F1 1F2 1F3 1F4 1F5 1F6 1F7 1F8 1F9 1FA 1FB 1FC 1FD 1FE 1FF

MODEL

DATA

D2 D1 D0

TV MICOM ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

MICON

EEPROM

DEFAULT

RANGE

MODEL

TV DESIGN ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

S-SYS POS 0

WRITE(CPU)

CHASSIS

CHECK DATA CHECK TYPE

TV PRODUCTION ENGINEERING

ISSUED DATE :

MANAGER

CHIEF

ENGINEER

CTV FINAL

CHECK DATA CHECK TYPE

SETTING DATA

LAST INITIAL

REMARKD7 D6 D5 D4 D3

LETTER NO.

17

20GT-15

TROUBLE SHOOTING TABLE

NO RASTER

Blown out.

Replace the fuse.

Check IC701, D701 and

C707.

Abnormal

YES

NO

ON/OFF ON

NO

Abnormal

Normal

The fuse is blown out again.

Does horizontal circuit

oscillate?

Check IC605, IC751 and

IC801.

D1001 (Power LED Red)

turns on or turns ON/OFF.

Check T701 pin (7) voltage

(Approx. 310V at 220V AC)

Check F701.

Normal

Check Secondary Main+B

(Approx. 115V)

Normal

Abnormal

Normal

Check CRT connector

K1-K5 bias.

Check

IC801.

Checking the protector

circuit.

Check R618 and R615.

D1001 (Power LED Green)

turns on.

Check D758, IC702 and

IC753.

Check R701, R707 and D709.

TROUBLE SHOOTING TABLE

(Continued)

NO PICTURE, NO SOUND

CIRCUITS TO BE CHECKED:

» Tuner

» PIF

» Automatic Gain Control.

» (5V), (32V) Power Source.

Does the noise level increase at max.

Contrast, Brightness and Sound controls?

NO

YES

NO

No snow noise.

Does signal appear at pin (40) of

IC801?

Noise increases but no signal is

received.

Check the tuner supply voltage LB

must be approx. 5V. BT must be

approx. 32V. And CH preset data

check.

Check the tuner AGC at

TP201.

Does signal

appear at pin (38)

of IC801?

Check IC801 and

related circuit.

Check IC PIF

circuit and it’s

related circuit.

Check Q205

and Q203

related circuit.

Check pin (27) of

IC801, Tuner and

realted circuit.

Check pin (38) of

IC801.

YES

(Signal)

NO

Does signal appear at pin

(44) of IC801?

NO SOUND

CIRCUITS TO BE CHECKED:

» Sound system pins (28), (29) &

(44) of IC801.

» Sound Detector Circuit.

» Sound Switch and Att. Control.

» Audio Output Circuit.

YES

NO

Does signal appear at pin

(6) and (8) of IC301?

Check connector IC301 and

peripheral circuit.

Does signal appear at pin

(28) & pin (29) of IC801?

Check

IC801.

Check C356,

C359 and

peripheral

circuit.

Check Q301, pins (4) and

(6) of IC801, and peripheral

circuit.

Normal

Normal Abnormal

18

20GT-15

TROUBLE SHOOTING TABLE

(Continued)

NEITHER VERTICAL NOR

HORIZONTAL SYNCHRONIZATION

CIRCUIT TO BE CHECKED:

» Sync. Separator Circuit.

NO VERTICAL SCAN

Check R503, R506, R513,

C517 and D501.

Check pins (33) & (34) of

IC801.

DEFECTIVE VERTICAL AMP.

AND VERTICAL LINEARITY

Re-adjust Vertical Size.

(Bas Data)

Check IC501.

Check C503 amd C507.

Check IC501.

Normal

Abnormal

Vertical Linearity and Size

are abnormal.

TROUBLE SHOOTING TABLE

(Continued)

NO SPECIFIC COLOUR

Is some colour produced in

B/W broadcast reception?

Is the white balance properly

adjusted?

Re-adjust the white balance.

The picture colour is yellow.

The picture colour is magenta.

The picture colour is cyan.

Check Q871, Q883 and its

adjacent circuits.

Check Q870, Q885 and its

adjacent circuits.

Check Q872, Q887 and its

adjacent circuits.

Check IC801 and Bias

control circuit.

Normal

NO SPECIFICATION COLOUR

“PAL/SECAM”

(NO COLOUR SYNCHRONIZATION)

NO YES

YES

NO

Check IC801, R801, R802,

R803, D804, D805, D806,

Q801.

Check X1001 (12MHz).

19

20GT-15

SOLID STATE DEVICE BASE DIAGRAM

TOP VIEW

85

43

COLLECTOR

14

M24C04W

64 33

132

ix3311CEN1/ ix3368CEN0

SIDE VIEW

BASE COLLECTOR EMITTER

2SA1015 2SC1815

12

FX0008GE D601A

COLLECTOR

JC

BASE EMITTER

2SC2735

BASE COLLECTOR EMITTER

123

PST573J

2SC2482

2R

BASE EMITTER

SE115N

:BR:

BASE EMITTER

B709AR

+ ~ ~ -

DX0386CE

BCE

2SD2586

PX0423CE

1

TA48M033

ANODE (RED) CATHODE (COMMON) ANODE (GREEN)

3

STRF6654

123

KA7808 KA7805

112

TDA7056A

24

135

9

TDA8357

20

CHASSIS LAYOUT

20GT-15

21

20GT-15

BLOCK DIAGRAM

MAIN UNIT BLOCK DIAGRAM

22~23

20GT-15

CRT BLOCK DIAGRAM

24

WAVEFORMS

20GT-15

25

20GT-15

DESCRIPTION OF SCHEMATIC DIAGRAM

SAFETY NOTES:

1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS.

2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING.

IMPORTANT SAFETY NOTICE:

PARTS MARKED WITH “å” ( ) ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY AND PERFORMANCE OF THE SET.

SERVICE PRECAUTION:

THE AREA ENCLOSED BY THIS LINE ( CONNECTED WITH AC MAINS VOLTAGE. WHEN SERVICING THE AREA, CONNECT AN ISOLATING TRANSFORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE HAZARD OF ELECTRIC SHOCK.

) IS DIRECTLY

NOTES:

1. The unit of resistance “ohm” is omitted. (K = 1000 ohms, M = Meg ohm).

2. All resistors are 1/16 watt, unless otherwise noted.

3. All capacitors are µF, unless otherwise noted. (P = µµF).

VOLTAGE MEASUREMENT CONDITIONS:

1. Voltage in parenthesis measured with no Signal.

2. Voltages without parenthesis measured with PAL Colour-Signal.

3. All the voltages in each point are measured high impedance voltmeter.

WAVEFORM MEASUREMENT CONDITIONS:

1. Colour bar generator signal of 1.8V peak to peak applied at Base of Video Buffer Amp. Q200.

2. Approximately 4.0 V AGC bias.

26

SCHEMATIC DIAGRAM

Infrared Remote Control Unit

J

I

H

G

NOTE: The parts here shown are supplied as an assembly but not independently.

20GT-15

F

E

D

C

B

A

12345678910

Notes

27

Unless specified, the resistors are 1/10W ± 5%.

20GT-15

C307

102Y

C351

103B

C200

100p

D200

HSC277

D100

HSC277

L100

L101

L102

L103

L104

C102

10p CH

L105

R101

1.8k

L106

C105

8p CH

C103

120p

C104

103B

L116

C130

102B

D110

HSC277

D111

HSC277

L117

L107

L109

C108

103B

L110

C107

103B

R103

2.2k

R102

1k

L116

1µ

C106

4p CH

R104

820

C109

103B

R105

470k

L108

C123

103B

C101

120p

C125

2.5p CH

C100

5p CH

C204

39p

L202

L201

C201

102Y

C207

103B

R202

47k

R208

1.2k

C205

1.5p CH D201

IT402

L204

C206

102B

R201

33k

C213

102B

R116

47k

D102

IT402

D103

IT407

R141

270k

R108

27k

C112

102B

C111

102Y

R114

47k

Q101

S8304

R106

47k

D104

IT407

R142

100k

C131

102B

J103

0

R143

0

C1

2000p

AGC

L118

1.2µ

D112

HSC277

D106

HSC277

C114

103B

C116

103B

C117

103B

D105

IT407

R110

47k

L117

0.18µ

C113

103B

L113

R111

5.6

L111

C115

0.2p CH

R109

10

C128

4p CH

C126

0.3p CH ± 0.1p

L112

Q201

S594

C208

102B

C210

24p ± 3

R206

33k

L206

D202

IT402

L205

R204

22

R203

82

C209

1.5p CH

J201

0

J202

0

C312

472B

R311

10k

C212

0.9p ± 0.1

C261

102B

L207

D203

IT402

R207

33k

C211

24p ± 3

C122

102B

C151

102B

J301

0

C214

105p

D109

IT402

C118

1p CH

±0.1p

D108

IT407

R144

47k

C310

103B

J302

0

C301

103B

C353

102

R147

100

T301

R306

2k

C119

103B

D107

HSC277

L114

D301

1SS355

R117 47k

R113

10k

R120

10

L115

C120

103B

C127

102B

R303

220

R302

220

R301

220

C3

2000p

C4

22p

C5

22p

AS SDA

SCL

5V(MB)

C9

2000p

C7

2000p

C6

2000p

5V(BP)

32V(BT)

J303

0

C308

220p CH

CR301

4MHz

C306

103B

C305

473B

R307

47k

C304

102B

R254

4.7

R252

47k

R251

47k

C253

82p UJ

C254

8p ± 0.25 UJ

C252

82p UJ

C171

2p UJ

C172

102B

R146

390

C152

18p UJ

D154

IT402

R172

68

L151

R171

47k

L152

C156

82p CH

R174

2k

D153

HSC277

D152

HSC277

R156

1k

C155

103B

C352

103B

R175

1k

R173

47k

C153

1000p UJ

R152

47k

C161

105p

D251

IT402

D252

IT402

D151

IT402

C255

0.5±0.1UJ

C256

0.5±0.1UJ

L251

R253

33k

C309

103B

L303

10µH

C311

100p

Q301

KTC4075

R308

10k

R310 10k

L304

R309

10k

R115

47k

C11

33p

IF OUT

1

2

3

4

5

6

7

8

9

10

C302

8p CH

TP

11

12

13

14

15

IC301

IX2145

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

C303

102Y

Tuner

NOTE: The parts here shown are supplied as an assembly but not independently.

å VTUVTST5HD84/

J

I

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G

F

E

D

C

B

A

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28

CRT UNIT

J

I

H

G

20GT-15

F

E

D

C

B

A

12345678910

29

20GT-15

MAIN UNIT

J

I

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G

F

E

D

C

B

A

1234567891011 12 13 14 15 16 17 18 19 20

30~31

20GT-15

PRINTED WIRING BOARD ASSEMBLIES

PWB-A: MAIN UNIT (WIRING SIDE)

J

I

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G

F

E

D

C

B

A

1234567891011 12 13 14 15 16 17 18 19 20

32~33

20GT-15

PWB-A: MAIN UNIT (WIRING SIDE) (CHIP PARTS)

J

I

H

G

F

E

D

C

B

A

1234567891011 12 13 14 15 16 17 18 19 20

34~35

20GT-15

J

I

H

G

PWB-B: CRT UNIT

F

E

D

C

B

A

12345678910

36

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

Q203 VS2SD601AR/-1 R 2SD601AR AC

REPLACEMENT PARTS LIST

PARTS REPLACEMENT

Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features are identified by "å" in the Replacement Parts Lists. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended replacement parts shown in this service manual may create shock, fire or other hazards.

"HOW TO ORDER REPLACEMENT PARTS"

To have your order filled promptly and correctly, please furnish the following informations.

1. MODEL NUMBER 2. REF. NO.

3. PART NO. 4. DESCRIPTION

MARK : SPARE PARTS-DELIVERY SECTION.

Ref. No. Part No. ★ Description Code

PICTURE TUBE

å VB48LGS20X/*S Picture Tube å L708 RCiLG0002KJZZ Degaussing Coil å RCiLH1837CEZZ R Deflection Yoke BC å QEARC2006CEZZ Ground-Part

MSPRT0001PEFJ R Spring AC PMAGF3041CEZZ R Magnet AG LHLDW0003PEKZ R Holder AB LHLDW1075PEKZ R Holder AC PSPAG0004KJZZ R Spacer AB

PRINTED WIRING BOARD ASSEMBLIES

(NOT REPLACEMENT ITEM)

PWB-A DUNTK9988WET2 - Main Unit — PWB-B DUNTK9990WET1 - CRT Unit —

PWB-A DUNTK9988WET2 MAIN UNIT

TUNER

NOTE: THE PARTS HERES SHOWN ARE SUPPLIED AS AN

ASSEMBLY NOT INDEPENDENTLY.

å TU201 VTUVTST5HD84/ R Tuner BB

INTEGRATED CIRCUITS

IC301 VHiTDA7056A-1 R TDA7056A AP IC501 VHiTDA8357/-1 R TDA8357 AN IC605 VHiKA7808Pi-1 R KA7808PI AF IC701 VHiSTRF6654-1 R STRF6654 AX IC751 VHiTA48M033-1 R TA48M033 AH IC753 VHiSE115N//-1 R SE115N AF IC801 RH-iX3368CEN1 R IX3368CE BE IC1002 VHiPST573J/-1 R PST573J AE IC1003 VHiM24C04W/-1 R M24C04W AG IC1005 VHiKA7805Pi-1 R KA7805PI AE

TRANSISTORS

Q201 VS2SC2735//1E R 2SC2735 AC

Q205 VS2SC1815GW-1 R 2SC1815GW AB Q301 VS2SD601AR/-1 R 2SD601AR AC Q302 VS2SD601AR/-1 R 2SD601AR AC Q305 VS2SD601AR/-1 R 2SD601AR AC Q601 VS2SC2482//-1 R 2SC2482 AD Q602 VS2SD2586//1E R 2SD2586 AM Q603 VS2SD601AR/-1 R 2SD601AR AC Q801 VS2SB709AR/-1 R 2SB709AR AC Q802 VS2SB709AR/-1 R 2SB709AR AC Q1003 VS2SD601AR/-1 R 2SD601AR AC Q1010 VS2SD601AR/-1 R 2SD601AR AC

DIODES AND LED’S

D201 RH-EX0676GEZZ R Zener Diode AA D301 VHD1SS119//-1 R 1SS119 AB D305 RH-EX0631GEZZ R Zener Diode AA D310 RH-DX0302CEZZ R DX0302CE AC D402 RH-EX0631GEZZ R Zener Diode AA D501 RH-EX0640GEZZ R Zener Diode AA D502 VHD1SS119//-1 R 1SS119 AB D503 VHD1SS119//-1 R 1SS119 AB D504 VHD1SS119//-1 R 1SS119 AB D505 RH-DX0127CEZZ R DX0127CE AC D507 VHD1SS119//-1 R 1SS119 AB D508 RH-EX0647GEZZ R Zener Diode AA D509 RH-EX0647GEZZ R Zener Diode AA D510 RH-EX0867CEZZ R Zener Diode AC D511 RH-EX0867CEZZ R Zener Diode AC D512 VHD1SS119//-1 R 1SS119 AB D513 VHD1SS119//-1 R 1SS119 AB D514 RH-EX0903CEZZ R Zener Diode AC D515 RH-EX0903CEZZ R Zener Diode AC D602 VHD1SS119//-1 R 1SS119 AB D603 RH-DX0062CEZZ R DX0062CE AD D604 VHD1SS119//-1 R 1SS119 AB D605 RH-EX0840CEZZ R Zener Diode AC D606 VHD1SS119//-1 R 1SS119 AB D607 RH-EX0658GEZZ R Zener Diode AA D608 RH-EX0604GEZZ R Zener Diode AB D609 VHD1SS119//-1 R 1SS119 AB D611 RH-DX0302CEZZ R DX0302CE AC D612 RH-EX0627GEZZ R Zener Diode AA D613 VHD1SS119//-1 R 1SS119 AB D614 VHD1SS119//-1 R 1SS119 AB

å D701 RH-DX0386CEZZ R DX0386CE AG

D702 VHD1SS82///1A R 1SS82 AC D705 RH-DX0492CEZZ R DX0492CE AE D706 VHD1SS82///1A R 1SS82 AC D707 VHD1SS82///1A R 1SS82 AC D708 RH-DX0400CEZZ R DX0400CE AC D709 RH-DX0164CEZZ R DX0400CE AC D710 RH-EX0601GEZZ R Zener Diode AA D711 VHD1SS82///1A R 1SS82 AC D712 VHD1SS82///1A R 1SS82 AC D713 RH-EX0621GEZZ R Zener Diode AB D714 RH-DX0055TAZZ R DX0055TA AD D715 RH-DX0055TAZZ R DX0055TA AD D718 RH-EX0649GEZZ R Zener Diode AB D751 RH-DX0471CEZZ R DX0471CE AE D752 VHD1SS119//-1 R 1SS119 AB D753 RH-DX0471CEZZ R DX0471CE AE D758 RH-DX0461CEZZ R DX0461CE AG D801 VHD1SS119//-1 R 1SS119 AB D802 VHD1SS119//-1 R 1SS119 AB D803 VHD1SS119//-1 R 1SS119 AB D804 VHD1SS119//-1 R 1SS119 AB D805 VHD1SS119//-1 R 1SS119 AB D806 VHD1SS119//-1 R 1SS119 AB D1001 RH-PX0423CEZZ R LED AD D1004 VHD1SS119//-1 R 1SS119 AB D1007 RH-EX0867CEZZ R Zener Diode AC D1008 RH-EX0867CEZZ R Zener Diode AC D1009 RH-EX0867CEZZ R Zener Diode AC D1010 RH-EX0867CEZZ R Zener Diode AC

å IC702 RH-FX0008GEZZ R PC123FY8 AE å VA700 RH-VX0047CEZZ R Varistor AF

20GT-15

37

20GT-15

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

PR701 RMPTP0001PEZZ R Packaged Circuit AN

PACKAGED CIRCUIT

CRYSTAL

X1001 RCRSB0281CEZZ R Crystal, CRSB0281CE AG

FILTERS

CF202 RFiLC0335CEZZ Filter, FiLC0335CE SF201 RFiLC0442CEZZ R Filter, FiLC0442CE AL

COILS

L202 VP-DF270K0000 R Peaking, 27µHAB L203 VP-DF270K0000 R Peaking, 27µHAB L204 VP-XF1R2K0000 R Peaking, 1.2µHAB L205 VP-DF1R0K0000 R Peaking, 1µHAB L207 VP-DF1R0K0000 R Peaking, 1µHAB L209 VP-XF100K0000 R Peaking, 10µHAB L601 VP-CF1R0M0000 R Peaking, 1µHAB L603 RCiLP0225CEZZ R Coil, CiLP0225CE AF

å L702 RCiLF0019PEZZ R Coil, CiLF0019PE AN

L802 VP-DF100K0000 R Peaking, 10µHAB L803 VP-DF100K0000 R Peaking, 10µHAB L1030 VP-DF100K0000 R Peaking, 10µHAB L1050 VP-DF100K0000 R Peaking, 10µHAB L1051 VP-DF100K0000 R Peaking, 10µHAB

TRANSFORMERS

å T601 RTRNZ0026PEZZ R Transformer AH å T602 RTRNF0188PEZZ H-Volt Transformer å T701 RTRNZ0141PEZZ R Transformer AR

CAPACITORS

C200 VCEA0A1CW476M R 47 16V Electrolytic AB C203 VCKYCY1HF103Z R 0.01 50V Ceramic AA C204 VCEA0A1CW107M R 100 16V Electrolytic AC C205 VCKYCY1HF103Z R 0.01 50V Ceramic AA C206 VCEA0A1HW106M R 10 50V Electrolytic AB C207 VCKYCY1HF103Z R 0.01 50V Ceramic AA C208 VCKYCY1HF103Z R 0.01 50V Ceramic AA C209 VCKYCY1HF103Z R 0.01 50V Ceramic AA C210 VCKYCY1HF103Z R 0.01 50V Ceramic AA C211 VCKYCY1EF104Z R 0.1 25V Ceramic AA C212 VCEA0A1CW106M R 10 16V Electrolytic AB C213 VCKYCY1HF223Z R 0.022 50V Ceramic AB C215 VCEA0A1CW476M R 47 16V Electrolytic AB C216 VCKYCY1HB821K R 820p 50V Ceramic AA C217 VCKYCY1HB472K R 4700p 50V Ceramic AA C302 VCEA0A1HW225M R 2.2 50V Electrolytic AB C303 VCEA0A1CW106M R 10 16V Electrolytic AB C304 VCQYTA1HM473J R 0.047 50V Mylar AA C305 VCQYTA1HM473J R 0.047 50V Mylar AA C312 VCQYTA1HM123J R 0.012 50V Mylar AA C314 VCEA0A1EW477M R 470 25V Electrolytic AD C315 VCKYPA1HF103Z R 0.01 50V Ceramic AA C317 VCEA0A1HW224M R 0.22 50V Electrolytic AB C318 VCKYCY1HB102K R 1000p 50V Ceramic AA C331 VCEA0A1HW105M R 1 50V Electrolytic AB C332 VCEA0A1EW477M R 470 25V Electrolytic AD C333 VCKYPA2HB102K R 1000p 500V Ceramic AA C356 VCKYCY1HB682K R 6800p 50V Ceramic AA C359 VCEA9M1CW106M R 10 16V Electrolytic AB C364 VCEA0A1CW106M R 10 16V Electrolytic AB C371 VCEA0A1CW476M R 47 16V Electrolytic AB C390 VCEA0A1HW105M R 1 50V Electrolytic AB C406 VCEA0A1CW477M R 470 16V Electrolytic AC C408 VCEA0A1CW106M R 10 16V Electrolytic AB C409 VCKYCY1EF104Z R 0.1 25V Ceramic AA C410 VCKYCY1EF104Z R 0.1 25V Ceramic AA C411 VCKYCY1HB102K R 1000p 50V Ceramic AA C469 VCEA0A1HW105M R 1 50V Electrolytic AB C501 VCKYCY1HF103Z R 0.01 50V Ceramic AA C502 VCKYCY1HF103Z R 0.01 50V Ceramic AA C503 VCEA0A1EW108M R 1000 25V Electrolytic AD C504 VCKYCY1HF223Z R 0.022 50V Ceramic AB C506 VCQYTA1HM104J R 0.1 50V Mylar AA C507 VCEA0A1JW107M R 100 63V Electrolytic AC C508 VCQYTA1HM103J R 0.01 50V Mylar AA

C512 VCKYCY1HB102K R 1000p 50V Ceramic AA C513 VCKYCY1HB102K R 1000p 50V Ceramic AA C514 VCKYPA1HF103Z R 0.01 50V Ceramic AA C515 VCKYPA2HB102K R 1000p 500V Ceramic AA C516 VCEA0A1JW477M R 470 63V Electrolytic AE C517 VCFYFA1HA104J R 0.1 50V AA

MetalIzed Polypro Film C601 VCEAGA2EW106M R 10 250V Electrolytic AC C602 VCQYTA1HM104J R 0.1 50V Mylar AA C603 VCEA0A1HW105M R 1 50V Electrolytic AB C604 VCEA0A1HW105M R 1 50V Electrolytic AB C605 VCKYPA1HF103Z R 0.01 50V Ceramic AA C606 VCKYCY1HF103Z R 0.01 50V Ceramic AA C607 VCEA0A1CW477M R 470 16V Electrolytic AC C608 VCEA0A1EW476M R 47 25V Electrolytic AB C609 VCEA0A1EW108M R 1000 25V Electrolytic AD C610 VCFYSB2EB823J R 0.082 250V AD

MetalIzed Polypro Film C611 VCKYPA2HB102K R 1000p 500V Ceramic AA C612 RC-EZ0724CEZZ R 100 160V Electrolytic AG C613 VCFPPD2DB684J R 0.68 200V AE

MetalIzed Polypro Film C614 RC-KZ0039CEZZ R 680p 2kV Ceramic AB C615 VCFPPB2EB224J R 0.22 250V AD

MetalIzed Polypro Film C616 VCFPPD3CA752H R 7500p 1600V AF

MetalIzed Polypro Film C617 VCKYPA2HB102K R 1000p 500V Ceramic AA C620 VCKYCY1EF104Z R 0.1 25V Ceramic AA C623 VCQYTA1HM222J R 2200p 50V Mylar AA C624 VCQYTA1HM472J R 4700p 50V Mylar AB C625 VCEA0A1HW105M R 1 50V Electrolytic AB C626 VCKYCY1HF223Z R 0.022 50V Ceramic AB C627 VCEA0A1HW106M R 10 50V Electrolytic AB C628 VCEA0A1HW474M R 0.47 50V Electrolytic AB C650 VCKYCY1EF104Z R 0.1 25V Ceramic AA C654 VCEA0A1CW476M R 47 16V Electrolytic AB C700 VCQYTA2AA103K R 0.01 100V Mylar AC

å C701 RC-FZ008SGEZZ R 0.1 AC250V AD

MetalIzed Polypro Film C702 RC-KZ0160GEZZ R 0.01 250V Ceramic AC C703 RC-KZ0160GEZZ R 0.01 250V Ceramic AC C704 VCKYPA2HB102K R 1000p 500V Ceramic AA C705 VCKYPA2HB102K R 1000p 500V Ceramic AA C707 RC-EZ0804CEZZ R 200 400V Electrolytic AU C708 RC-KZ0160GEZZ R 0.01 250V Ceramic AC C709 VCQYTA1HM471J R 470p 50V Mylar AB C711 RC-KZ0039CEZZ R 680p 2kV Ceramic AB C712 VCQYTA1HM102J R 1000p 50V Mylar AA C713 RC-KZ007JCEZZ R 0.01 250V Ceramic AC C714 VCKYPH3DB561K R 560p 2000V Ceramic AC C715 VCKYPA2HB102K R 1000p 500V Ceramic AA C717 VCQYTA1HM182J R 1800p 50V Mylar AA C718 VCEAGA2AW475M R 4.7 100V Electrolytic AB C719 VCEA9M1HW226M R 22 50V Electrolytic AB

å C721 RC-KZ0102GEZZ R 680p 4kV Ceramic AE

C751 VCEA0A1CW476M R 47 16V Electrolytic AB C752 VCEA0A0JW107M R 100 6.3V Electrolytic AB C753 VCKYPA2HB102K R 1000p 500V Ceramic AA C755 VCEA0A1CW108M R 1000 16V Electrolytic AD

å C759 VCKYPA1HB102K R 1000p 50V Ceramic AA

C760 RC-KZ0039CEZZ R 680p 2kV Ceramic AB C761 VCEA4W2CN227M R 220 160V Electrolytic AG C762 VCQYTA1HM473J R 0.047 50V Mylar AA C801 VCEA0A1HW105M R 1 50V Electrolytic AB C802 VCEA0A1CW337M R 330 16V Electrolytic AC C803 VCEA9M1CW107M R 100 16V Electrolytic AB C804 VCKYCY1HB222K R 2200p 50V Ceramic AA C805 VCKYCY1HB102K R 1000p 50V Ceramic AA C806 VCKYCY1HB102K R 1000p 50V Ceramic AA C807 VCKYCY1HB102K R 1000p 50V Ceramic AA C808 VCEA0A1CW107M R 100 16V Electrolytic AC C809 VCKYCY1HF223Z R 0.022 50V Ceramic AB C810 VCKYCY1EF104Z R 0.1 25V Ceramic AA C811 VCEA0A1CW107M R 100 16V Electrolytic AC C812 VCFYFA1HA224J R 0.22 50V AB

MetalIzed Polypro Film

38

20GT-15

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

C813 VCFYFA1HA224J R 0.22 50V AB

MetalIzed Polypro Film C814 VCKYCY1HB471K R 470p 50V Ceramic AA C1001 VCEA0A0JW107M R 100 6.3V Electrolytic AB C1003 VCEA0A1CW106M R 10 16V Electrolytic AB C1004 VCKYCY1EF104Z R 0.1 25V Ceramic AA C1005 VCKYCY1HF223Z R 0.022 50V Ceramic AB C1006 VCEA0A1CW106M R 10 16V Electrolytic AB C1007 VCEA0A1CW106M R 10 16V Electrolytic AB C1008 VCCCCY1HH330J R 33p 50V Ceramic AA C1009 VCCCCY1HH330J R 33p 50V Ceramic AA C1010 VCEA0A0JW107M R 100 6.3V Electrolytic AB C1011 VCKYCY1HF223Z R 0.022 50V Ceramic AB C1012 VCKYCY1HF223Z R 0.022 50V Ceramic AB C1013 VCEA0A0JW107M R 100 6.3V Electrolytic AB C1014 VCEA0A1CW106M R 10 16V Electrolytic AB C1015 VCFYFA1HA474J R 0.47 50V AC

MetalIzed Polypro Film C1016 VCQYTA1HM104J R 0.1 50V Mylar AA C1018 VCKYCY1HB221K R 220p 50V Ceramic AA C1019 VCEA9M1HW225M R 2.2 50V Electrolytic AB

RESISTORS

JA1033 VRD-RA2BE102J R 1k 1/8W Carbon AA RJ2 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ11 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ13 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ14 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ15 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ16 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ21 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ25 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ26 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ27 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ28 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ29 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ30 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ31 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ32 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ33 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ34 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ40 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ41 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ50 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ51 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ53 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ55 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ61 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ64 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ66 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ67 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ68 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ69 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ71 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ74 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ75 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ76 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ78 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ79 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ80 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ84 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ85 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ87 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ88 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ89 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ94 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ95 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ96 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ103 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ201 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ202 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ205 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ206 VRS-CY1JF000J R 0 1/16W Metal Oxide AA RJ207 VRS-CY1JF000J R 0 1/16W Metal Oxide AA R201 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R202 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R203 VRD-RM2HD102J R 1k 1/2W Carbon AA R204 VRD-RM2HD102J R 1k 1/2W Carbon AA

R205 VRD-RA2BE680J R 68 1/8W Carbon AA R206 VRS-CY1JF122J R 1.2k 1/16W Metal Oxide AA R207 VRS-CY1JF221J R 220 1/16W Metal Oxide AA R208 VRS-CY1JF122J R 1.2k 1/16W Metal Oxide AA R209 VRS-CY1JF392J R 3.9k 1/16W Metal Oxide AA R217 VRD-RA2BE392J R 3.9k 1/8W Carbon AA R218 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R219 VRS-CY1JF391J R 390 1/16W Metal Oxide AA R220 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R221 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R222 VRS-CY1JF681J R 680 1/16W Metal Oxide AA R226 VRS-CY1JF750J R 75 1/16W Metal Oxide AA R227 VRD-RM2HD330J R 33 1/2W Carbon AA R228 VRD-RM2HD330J R 33 1/2W Carbon AA R230 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R231 VRS-CY1JF472J R 4.7k 1/16W Metal Oxide AA R233 VRS-CY1JF181J R 180 1/16W Metal Oxide AA R237 VRS-CY1JF272J R 2.7k 1/16W Metal Oxide AA R238 VRS-CY1JF821J R 820 1/16W Metal Oxide AA R239 VRS-CY1JF221J R 220 1/16W Metal Oxide AA R302 VRS-CY1JF473J R 47k 1/16W Metal Oxide AA R303 VRS-CY1JF473J R 47k 1/16W Metal Oxide AA R304 VRS-CY1JF392J R 3.9k 1/16W Metal Oxide AA R305 VRS-CY1JF100J R 10 1/16W Metal Oxide AA R307 VRD-RA2BE182J R 1.8k 1/8W Carbon AA R308 VRD-RA2BE472J R 4.7k 1/8W Carbon AA R320 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R321 VRS-CY1JF561J R 560 1/16W Metal Oxide AA R328 VRS-CY1JF564J R 560k 1/16W Metal Oxide AA R329 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA R330 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R331 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R332 VRS-CY1JF561J R 560 1/16W Metal Oxide AA R333 VRS-CY1JF103J R 10k 1/16W Metal Oxide AA R334 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R343 VRS-CY1JF104J R 100k 1/16W Metal Oxide AA R344 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R357 VRS-CY1JF100J R 10 1/16W Metal Oxide AA R378 VRN-VV3DBR68J R 0.68 2W Metal Film AA R406 VRS-CY1JF103J R 10k 1/16W Metal Oxide AA R411 VRD-RA2BE820J R 82 1/8W Carbon AA R412 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R501 VRS-CY1JF182J R 1.8k 1/16W Metal Oxide AA R502 VRS-CY1JF182J R 1.8k 1/16W Metal Oxide AA R503 VRD-RM2HD1R5J R 1.5 1/2W Carbon AA R505 VRD-RM2HD330J R 33 1/2W Carbon AA R506 VRD-RA2BE224J R 220k 1/8W Carbon AA R508 VRD-RM2HD221J R 220 1/2W Carbon AA R509 VRD-RM2HD1R0J R 1 1/2W Carbon AA R510 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R511 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R513 VRD-RA2BE393J R 39k 1/8W Carbon AA R514 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R515 VRS-CY1JF272J R 2.7k 1/16W Metal Oxide AA R602 VRN-VV3DB1R5J R 1.5 2W Metal Film AB R603 VRD-RM2HD102J R 1k 1/2W Carbon AA R604 VRD-RA2BE393J R 39k 1/8W Carbon AA R605 VRD-RM2HD101J R 100 1/2W Carbon AA R606 VRD-RA2BE333J R 33k 1/8W Carbon AA R607 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R608 VRS-CY1JF123J R 12k 1/16W Metal Oxide AA R609 VRD-RA2BE223G R 22k 1/8W Carbon AA R610 VRD-RA2BE822J R 8.2k 1/8W Carbon AA R611 VRD-RA2EE563G R 56k 1/4W Carbon AA R612 VRD-RA2BE103J R 10k 1/8W Carbon AA R613 VRD-RA2BE103J R 10k 1/8W Carbon AA R614 VRS-CY1JF103J R 10k 1/16W Metal Oxide AA R615 VRS-KT3LB332J R 3.3k 3W Metal Oxide AC R616 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R617 VRD-RM2HD472J R 4.7k 1/2W Carbon AA R618 VRS-KA3HG3R3K R 3.3 5W Metal Oxide AD R619 VRD-RM2HD682J R 6.8k 1/2W Carbon AA R622 VRS-VV3DB331J R 330 2W Metal Oxide AA R623 VRS-VV3DB150J R 15 2W Metal Oxide AA R624 VRD-RA2BE101J R 100 1/8W Carbon AB R625 VRS-CY1JF184J R 180k 1/16W Metal Oxide AA R626 VRS-CY1JF472J R 4.7k 1/16W Metal Oxide AA R628 VRD-RM2HD470J R 47 1/2W Carbon AA

39

20GT-15

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

R630 VRS-CY1JF100J R 10 1/16W Metal Oxide AA R631 VRS-CY1JF391J R 390 1/16W Metal Oxide AA R632 VRS-CY1JF273J R 27k 1/16W Metal Oxide AA R633 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R635 VRS-CY1JF822J R 8.2k 1/16W Metal Oxide AA R636 VRS-CY1JF223J R 22k 1/16W Metal Oxide AA R638 VRS-CY1JF103J R 10k 1/16W Metal Oxide AA R639 VRD-RA2BE101J R 100 1/8W Carbon AB R701 VRW-KQ4AC3R3K R 3.3 10W Cement AE R703 VRS-KT3LB473J R 47k 3W Metal Oxide AE

å R704 VRG-PD2HD150J R 15 1/2W Fuse Reisistor AC

R705 VRD-RA2BE122J R 1.2k 1/8W Carbon AA R706 VRD-RM2HD152J R 1.5k 1/2W Carbon AA R707 VRS-KT3LB473J R 47k 3W Metal Oxide AE R708 VRD-RM2HD272J R 2.7k 1/2W Carbon AA R709 VRD-RA2BE681J R 680 1/8W Carbon AA R710 VRN-VV3ABR39J R 0.39 1W Metal Film AA R711 VRN-VV3ABR33J R 0.33 1W Metal Film AA

å R712 VRG-PD2HD150J R 15 1/2W Fuse Reisistor AC

R717 VRD-RM2HD124J R 120k 1/2W Carbon AA R718 VRD-RM2HD124J R 120k 1/2W Carbon AA

å R719 VRC-UA2HG825K R 8.2M 1/2W Solid AA

R721 VRD-RA2BE393J R 39k 1/8W Carbon AA R722 VRD-RM2HD124J R 120k 1/2W Carbon AA R723 VRD-RA2BE684J R 680k 1/8W Carbon AA

å R726 VRC-UA2HG825K R 8.2M 1/2W Solid AA

R750 VRD-RM2HD4R7J R 4.7 1/2W Carbon AA R758 VRD-RA2BE102J R 1k 1/8W Carbon AA R760 VRD-RA2BE471J R 470 1/8W Carbon AA R801 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R802 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R803 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R804 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R805 VRS-CY1JF822J R 8.2k 1/16W Metal Oxide AA R806 VRD-RA2BE123J R 12k 1/8W Carbon AA R807 VRS-CY1JF103J R 10k 1/16W Metal Oxide AA R808 VRS-CY1JF221J R 220 1/16W Metal Oxide AA R809 VRD-RA2BE224J R 220k 1/8W Carbon AA R811 VRS-CY1JF563J R 56k 1/16W Metal Oxide AA R812 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R813 VRS-CY1JF221J R 220 1/16W Metal Oxide AA R1001 VRD-RA2BE221J R 220 1/8W Carbon AA R1002 VRS-CY1JF331J R 330 1/16W Metal Oxide AA R1003 VRS-CY1JF471J R 470 1/16W Metal Oxide AA R1004 VRS-CY1JF821J R 820 1/16W Metal Oxide AA R1005 VRD-RA2BE181J R 180 1/8W Carbon AA R1011 VRS-CY1JF820J R 82 1/16W Metal Oxide AA R1012 VRS-CY1JF391J R 390 1/16W Metal Oxide AA R1014 VRD-RA2BE101J R 100 1/8W Carbon AB R1015 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA R1016 VRD-RA2BE101J R 100 1/8W Carbon AB R1017 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA R1019 VRS-CY1JF472J R 4.7k 1/16W Metal Oxide AA R1020 VRD-RA2BE101J R 100 1/8W Carbon AB R1021 VRS-CY1JF153J R 15k 1/16W Metal Oxide AA R1022 VRD-RA2BE101J R 100 1/8W Carbon AB R1023 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R1024 VRS-CY1JF122J R 1.2k 1/16W Metal Oxide AA R1025 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R1026 VRS-CY1JF224J R 220k 1/16W Metal Oxide AA R1027 VRD-RA2BE101J R 100 1/8W Carbon AB R1028 VRD-RA2BE101J R 100 1/8W Carbon AB R1030 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R1031 VRD-RA2BE562J R 5.6k 1/8W Carbon AA R1032 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA R1034 VRD-RA2BE101J R 100 1/8W Carbon AB R1035 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA R1036 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA R1037 VRD-RA2BE101J R 100 1/8W Carbon AB R1038 VRD-RA2BE101J R 100 1/8W Carbon AB R1039 VRS-CY1JF223J R 22k 1/16W Metal Oxide AA R1040 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R1041 VRS-CY1JF101J R 100 1/16W Metal Oxide AA R1043 VRS-CY1JF153J R 15k 1/16W Metal Oxide AA R1044 VRS-CY1JF153J R 15k 1/16W Metal Oxide AA R1045 VRD-RA2BE271J R 270 1/8W Carbon AA R1046 VRD-RA2BE101J R 100 1/8W Carbon AB R1065 VRS-CY1JF101J R 100 1/16W Metal Oxide AA

FB306 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB501 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB502 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB602 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB701 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB702 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB751 RBLN-0037CEZZ R Balun, BLN-0037CE AB FB752 RBLN-0037CEZZ R Balun, BLN-0037CE AB

SWITCHES

BALUNES

å S701 QSW-P0591CEZZ R Switch AQ

S1001 QSW-K0079GEZZ R Switch, CH Up AB S1002 QSW-K0079GEZZ R Switch, CH Down AB S1003 QSW-K0079GEZZ R Switch, Vol Up AB S1004 QSW-K0079GEZZ R Switch, Vol Down AB S1005 QSW-K0079GEZZ R Switch, Menu AB

MISCELLANEOUS PARTS

å ACC701 QACCZ3008PEZZ R AC Cord AN å FH701 QFSHD1014CEZZ R Fuse Holder AC å FH702 QFSHD1013CEZZ R Fuse Holder AC å F701 QFS-C3229CEZZ R Fuse, T3.15A 250V AD

J405 QJAKH0011AJZZ R Jack AK P302 QPLGN0241CEZZ R Plug, 2 Pin AA P502 QPLGN0603CEZZ R Plug, 6 Pin AB P602 QPLGN0641CEZZ R Plug, 6 Pin AB P701 QPLGN0207CEZZ R Plug, 2 Pin AA P712 QPLGN0269GEZZ R Plug, 2 Pin AB P1001 QPLGN0541CEZZ R Plug, 5 Pin AB P1002 QPLGN0541CEZZ R Plug, 5 Pin AB RDA300 PRDAR0142PEFW R Heat Sink, IC301 AD RDA501 PRDAR0298PEFW R Heat Sink, IC501 AF RDA601 PRDAR0224PEFW R Heat Sink, Q602 AF RDA700 PRDAR0260PEFW R Heat Sink, IC701 AH RMC1001 SP301 RSP-Z0005KJZZ Speaker TP201 QLUGP0102PEZZ R Lug AA

RRMCU0235CEZZ R Remote Receiver AK

LHLDP1066PE00 R Holder AC QCNW-2378PEZZ R Connecting Cord AE QCNW-2405PEZZ R Connecting Cord AE QCNW-2433PEN1 R Connecting Cord AF

PWB-B DUNTK9990WET1 CRT UNIT

Q870 VSBF422////-1 R BF422 AC Q871 VSBF422////-1 R BF422 AC Q872 VSBF422////-1 R BF422 AC Q883 VSBF421////-1 R BF421 AC Q885 VSBF421////-1 R BF421 AC Q887 VSBF421////-1 R BF421 AC

D811 VHD1SS119//-1 R 1SS119 AB D812 VHD1SS119//-1 R 1SS119 AB D880 VHD1SS119//-1 R 1SS119 AB D881 VHD1SS119//-1 R 1SS119 AB D882 VHD1SS119//-1 R 1SS119 AB D883 VHD1SS82///1A R 1SS82 AC D884 VHD1SS82///1A R 1SS82 AC D885 VHD1SS82///1A R 1SS82 AC D886 VHD1SS82///1A R 1SS82 AC D887 VHD1SS82///1A R 1SS82 AC D888 VHD1SS82///1A R 1SS82 AC D890 RH-EX0627GEZZ R Zener Diode AA

C871 VCKYPA1HB471K R 470p 50V Ceramic AA C872 VCKYPA1HB471K R 470p 50V Ceramic AA C873 VCKYPA1HB471K R 470p 50V Ceramic AA C875 VCKYPA2HB102K R 1000p 500V Ceramic AA C876 RC-KZ0150CEZZ R 1000p 3kV Ceramic AB C878 VCEAGA2EW336M R 33 250V Electrolytic AD

TRANSISTORS

DIODES

CAPACITORS

40

20GT-15

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

C880 VCKYPA1HB471K R 470p 50V Ceramic AA C881 VCKYPA1HB471K R 470p 50V Ceramic AA C882 VCKYPA1HB471K R 470p 50V Ceramic AA

RESISTORS

R879 VRD-RA2BE471J R 470 1/8W Carbon AA R880 VRD-RA2BE471J R 470 1/8W Carbon AA R881 VRD-RA2BE471J R 470 1/8W Carbon AA R882 VRS-VV3DB153J R 15k 2W Metal Oxide AA R883 VRD-RM2HD272J R 2.7k 1/2W Carbon AA R884 VRS-VV3DB153J R 15k 2W Metal Oxide AA R885 VRD-RM2HD272J R 2.7k 1/2W Carbon AA R886 VRS-VV3DB153J R 15k 2W Metal Oxide AA R887 VRD-RM2HD272J R 2.7k 1/2W Carbon AA R888 VRD-RA2BE471J R 470 1/8W Carbon AA R892 VRD-RA2BE102J R 1k 1/8W Carbon AA R893 VRD-RA2BE102J R 1k 1/8W Carbon AA R894 VRD-RA2BE102J R 1k 1/8W Carbon AA R898 VRD-RA2BE471J R 470 1/8W Carbon AA R899 VRD-RA2BE471J R 470 1/8W Carbon AA

MISCELLANEOUS PARTS

P851 QPLGN0641CEZZ R Plug, 6 Pin AB P882 QPLGN0541CEZZ R Plug, 5 Pin AB

å SC881 QSOCV0840CEZZ R Socket, 11 Pin AK

SUPPLIED ACCESORIES

ACCESSORIES

RRMCG0025KJSA Infrared R-C TiNS-0109KJZZ Instruction Book

CABINET PARTS LOCATION

1

1-2

SHARP

1-31-5 1-7 1-6 1-4

2

PACKING PARTS

(NOT REPLACEMENT ITEM)

SPAKC0105KJZZ - Packing Case — SPAKP0697CEZZ - Wrapping Paper — SPAKX0067KJZZ - Packing Add. — SPAKX0068KJZZ - Packing Add. — SSAKA0230CEZZ - Polyethylene Bag —

CABINET PARTS

1 CCABA0083WEA0 Front Cabinet 1-2 HBDGB0001KJSA R SHARP Badge AE 1-3 HDECQ0038KJSA LED R/C Cover 1-4 HDECQ0039KJSA AV Cover 1-5 JBTN-0042KJSA Power Button 1-6 JBTN-0043KJSA Control Button 1-7 MSPRC0003KJFW Power Button Spring 2 CCABB0053WEA0 Rear Ass’y Cabinet

41

20GT-15

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

TQ0856-S

Mar. 2000 Printed in JAPAN

NA. NS

SHARP CORPORATION AV Systems Group Quality & Reliability Control Center Yaita, Tochigi 329-2193, Japan

42

Sharp 20GT15 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual