Sharp 14GT15, 14GT20 Service Manual

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Page 1

SERVICE MANUAL

(14GT15) (14GT20)

14GT15 14GT20

S30Y114GT15//

COLOUR TELEVISION

Chassis No. UA-1

14GT15

MODELS

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

14GT20

FEATURE

Favorite Channel

Full Auto Channel Preset and Auto Channel Skip

100-CH Program Memory

CATV(Hyper Band) Ready <Used Frequency Synthesizer Tuner>

AVL(Sound Keeper) Function

Black Stretch Circuit

On Timer/Sleep T imer/Reminder Timer

Blue Back Noise Mute

Front AV-In (14GT-20 Only)

Rear AV -In/Out T erminals

Colour Comb Filter (NTSC Only)

High Contrast Picture

Hotel Mode

Front Headphone JACK (14GT-20 Only)

English / Thai OSD

CONTENTS

Page Page

» SPECIFICATIONS ...........................................2

» IMPORTANT SERVICE NOTES ..................... 3

» ADJUSTMENT PRECAUTIONS..................... 4

» TROUBLE SHOOTING TABLE..................... 27

» SOLID STATE DEVICE BASE DIAGRAM .... 31

» CHASSIS LAYOUT ........................................32

» WAVEFORMS................................................34

» DESCRIPTION OF SCHEMA TIC DIAGRAM . 35 » SCHEMATIC DIAGRAM

■ INFRARED REMOTE CONTROL UNIT .. 36

■ TUNER .....................................................37

■ 14GT15, 14GT20 HOTEL MODE

APPLICATION ..........................................38

■ HEAD PHONE Unit and

CRT Socket Unit...................................... 39

■ MAIN Unit .................................................40

» BLOCK DIAGRAM.........................................44

» PRINTED WIRING BOARD ASSEMBLIES .. 49 » REPLACEMENT PARTS LIST

■ ELECTRICAL PARTS .............................. 54

■ MISCELLANEOUS PARTS...................... 58

■ SUPPLIED ACCESSORIES .................... 58

■ P ACKING PARTS .................................... 58

■ CABINET PARTS .................................... 59

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

Page 2

14GT15 14GT20

SPECIFICATIONS

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

Focus ............................................................Electrostatic Focus High Bi-Potential

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

Intermediate Frequencies

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

Sound IF Carrier Frequency

5.5MHz...............................................................................................33.4MHz

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

Power Input..................................................................... 100 ~ 240V AC 50/60 Hz

Power Consumption........................................................................................ 65W

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

Speaker

Size...................................................................................5 x 9 cm Elliptic (1pc)

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

Aerial Input Impedance

VHF/UHF .......................................................................... 75 ohms Unbalanced

Receiving Channel PAL B/G

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

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

Dimensions ...................................................................................Width: 351.0mm

Height: 361.0mm

Depth: 359.0mm

Weight(approx): 9.2 kg

Cabinet material.................................................................................... All Plastics

Specifications are subject to change without prior notice.

Page 3

IMPORTANT SERVICE NOTES

Maintenance and repair of this receiver should be done by qualified service personnel only.

SERVICE OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE

When servicing the high voltage system, remove static charge from it by 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 cord should be disconnected from AC outlet.)

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

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

3. Do not lift picture tube by the neck.

4. Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely.

14GT15 14GT20

X-RAY

This receiver is designed so that any X-Ray radiation is kept to an absolute Minimum. Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range, the followin precautions should be observed:

1. When repairing the circuit, be sure not to increase the high voltage to more than 25.8kV

(at beam 0 µA) for the set.

2. To keep the set in a normal opeartion , be sure to make it function on 22.8kV ±1.5kV (at

beam 800 µA) in the case of the set. The set has been factory - Adjusted to the abovementioned high voltage.

∴If there is a possibility that the high voltage fluctuates as a result of the repairs,

never forget to check for such high voltage after the work.

3. Do not substitute a picture tube with unauthorizerd types and/or brands which may

cause excess X-ray radiation.

BEFORE RETURNING THE RECEIVER

Before returning the receiver to the user , perform the following safety Checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver.

2. Inspect all protective devices such as non-metallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, isolation resistor- capacity networks, mechanical insulators etc.

Page 4

14GT15 14GT20

ADJUSTMENT PRECAUTIONS

This model's setting are adjusted in two different ways: 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.

1. Setting the service mode by the microprocessor.

1. Short JA 122 & JA 124 for 1 second and release to switch to the service mode position, and the microprocessor is in input mode. (Adjustment through the I2C bus control). (Use JWS Key to set as well).

2. Press the CH DOWN / UP key on the remote controller to get ready to select the mode one by one.

3. Press the CH DOWN / UP key on the remote controller to select the modes reversibly one by one.

4. Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.

5. Short JA 122 & JA 124 for 1 second and release to switch to the normal mode (OFF) position, and the

microprocessor is in out of the service mode.

2. Factory Presetting.

1. Short JA 122 & JA 124 for 1 second and release to switch to the service mode position and turn on the main power switch.Initial values are automatically preset, only when a new EEPROM is used (Judge with the first 4 bytes ).

2. The initial data are preset as listed in page 7, 8, & 9.

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

Note: Once the chassis has been assembly together and ready to be POWER ON for the FIRST TIME,

make sure to short JA122 & JA124 to switch to the service mode position first and then turn on the main power switch (See 2-(1) above).

Precaution: If haven't done this initiation, it may possibly generate excessive Beam current.

3. For reference please check with memory map (UA1 Series type RH-iX3368CE Attachment)

Page 5

SERVICE MODE

AGC &

GEOMETRIC

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)

WHITE POINT

ADJ.

MODE

↓

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)

SUB ADJ.

MODE

↓

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.

FORWARD : CH DOWN KEY REVERSE : CH UP KEY

AGC &

GEOMETRIC

MODE

WHITE POINT

ADJ.

MODE

SUB ADJ.

MODE

Y-DELAY

ADJ.

MODE

MISC.

OPTION

MODE

OPTION

MODE

OFFSET

ADJ.

MODE

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

14GT15 14GT20

Page 6

14GT15 14GT20

Y-DELAY

ADJ.

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)

SHARPNESS OFFSET (SECAM) (SHP-OS)

↓

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

SHARPNESS OFFSET (NTSC358) (SHP-O3)

↓

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

SHARPNESS OFFSET (NTSC443) (SHP-O4)

↓

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

↓

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

*(Y-D : Y-DELAY)

MISC.

OPTION

MODE

OFFSET

ADJ.

MODE

↓

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)

↓ ↓ ↓

OPTION

MODE

↓

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)

↓

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 (VMC)

↓

HOTEL MODE (HTL)

↓

REDUCED FM DEMODULATION

GAIN FOR BTSC SIGNAL (BTSC)

↓

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)

↓

BILINGUAL(BIL)

↓

IF AGC SPEED BIT 0 (AGC0)

↓

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)

Page 7

USER DATA IN SERVICE MODE

The flow of Mode lists as following,

* Direct Key-in Step1 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 FLASH BACK CUT-G

14GT15 14GT20

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14GT15 14GT20

AFTER SHORT JA 122 & JA 124 ,AND TURN ON THE MAIN POWER SWITCH,READ DATA FROM EEPROM ADDRESS 00H ~ 03H,AND COMPARE TO THE LIST BELOW, IF DIFFERENT, INITIALIZE THE EEPROM.

Address : Data Address : Data

00H : 55H 02H : 43H 01H : 4FH 03H : A1H

EEPROM ITEMS OSD DATA LENGTH

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 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 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 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 ADJ MAX HOTEL VOLUME HTL-VOL 0~63 32 ADJ 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 G CUT-G 0~15 8 FIX CATHODE DRIVE LEVEL CDL 0~15 0 FIX 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-03 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

0~99 OR>99FOR NONE

INITIAL DATA

255 FIX

FIX/ADJ REMARK

(DRI-BS)SAME DATA

Page 9

14GT15 14GT20

EEPROM ITEMS OSD DATA LENGTH

VERTICAL SCAN DISABLE VSD BLACK STRETCH BKS AUTOMATIC VOLUME LEVELING AVL FAST FILTER IF-PLL FFI ENABLE VERTICAL GUARD (RGB BLANKING) EHT TRACKING MODE (HCO) EHT OVERSCAN SWITCH OFF OSO 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

EVG

VMC

BTSC

0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE)

0 FOR1 AV/1 FOR 2AV 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE)

0(BRAZIL)/1(ARGENTINA)

0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE)

INITIAL DATA

0 FIX 1 FIX 1 FIX 0 FIX 1 FIX ONLY BLK 1 FIX 0 FIX 0 FIX 0 FIX 0 FIX 1 FIX *1 1 FIX *1 1 FIX 1 FIX *1 0 FIX 1 FIX *1 1 FIX *1 1 FIX 1 FIX 0 FIX 0 FIX 1 FIX *2 0 FIX 1 FIX 0 FIX 0 FIX *3 1 FIX *4 1 FIX *4 1 FIX *4 1 FIX *4 1 FIX *4 0 FIX 0 FIX 0 FIX 0 FIX 1 FIX 0 FIX 0 FIX 0 FIX 1 FIX 1 FIX

FIX/ADJ REMARK

NOTE :

FIXED DATA,PLEASE DO NOT CHANGE WITHOUT SPECIFIC INSTRUCTION. *1: MANUALLY CHANGE TO 0. *2: FOR 14GT15, MANUALLY CHANGE TO 0. *3: MANUALLY CHANGE TO 1. *4: MANUALLY CHANGE TO 0.

Page 10

14GT15 14GT20

SHIPPING SETTING & CHECKING

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

ITEMS DATA SETTING

LAST PROGRAM/CHANNEL 1 FLASHBACK PROGARM/CH 1

DIGIT 1 C-SYSTEM AUTO S-SYSTEM B/G

SKIP OFF

AFC ON

VOLUME 1

CONTRAST 60 (MAX)

COLOUR 0 (CENTER)

BRIGHTNESS 0 (CENTER)

TINT 0 (CENTER) SHARPNESS 0 (CENTER) WHITE TEMP ST ANDARD

REMINDER TIMER In-active, "--:--"

ON TIMER In-active, "--:--"

OFF TIMER In-active, "--:--"

LAST POWER POWER-ON

LANGUAGE ENGLISH

BLUE BACK MUTE OFF

HOTEL MODE OFF

0 CHANNEL SKIP ON

AFTER PRESSING MODEL SETTING, 0 CHANNEL WILL BE SKIPPED.

Page 11

PIF ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

Tuner IFT

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

( PRESET )

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.

Oscilloscope

1000p

10k

100k

1n60

75ohm

Fig.1

E-9 CH

P C

-1.5+/-0.8dB

14GT15 14GT20

IF OUT

RF-AGC

TAKE OVER POINT ADJUSTMENT (I2C BUS CONTROL)

Note: Be sure to keep the tuner cover in position

during this adjustment.

1. Receive "PAL COLOUR BAR" signal. » Signal Strength: 57 ± 1 dBµV (75 ohm open)

2. Connect the oscilloscope to TP201 (Tuner’s AGC Terminal) as shown in Fig. 3.

Oscilloscope

0.1V

TP201+

–

Bias box

TV Set

–

» Bias box: About 4.5 V

Fig. 3

3. Call "AGC" mode in service mode. Adjust the "AGC" 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 dBµV to be sure that there is no cross modulation beat.

Fig.2

Note: For the 50 ohm signal

strength gauge, when not using 50/75 impedance adapter, signal strength is 52±1dBµV(75 ohm open), in- stead of 57±1dBµV (75 ohm open).

Precaution: The loss of using

impedance adapter

Page 12

14GT15 14GT20

PURITY ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

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

beam current to about 500 µA.

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. 4-1 through the microscope. Adjust the landing to the A rank requirements.

4. Orient the raster rotation to 0 eastward.

5. Tighten up the deflection coil screws. » Tightening torque: 108 ± 20 N (11 ± 2 kgf)

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 500 µA.

Fig. 4-1

A = B

Fig. 4-2

Rank "A"

(on the right of the CRT)

A = B

Fig. 4-3

Rank "A"

(on the left of the CRT)

Page 13

CONVERGENCE ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

14GT15 14GT20

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. 5-1: Drive the wedge at point "a" and swing

the deflection coil upward.

b) Fig. 5-2: Drive the wedge at points "b" and "c"

and swing the deflection coil downward.

c) Fig. 5-3: Drive the "c" wedge deeper and swing

the deflection coil rightward.

d) Fig. 5-4: 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.

BGR

B G R

Fig. 5-1

RGB

R G B

Fig. 5-2

B G R

Fig. 5-3

R G B

RGB

BGR

Finally received the Red-only and Blue-only signals to make sure there is no other colours on the screen.

About 100°

Lacquer

Wedge "b"

4-pole magnet

Lacquer

Purity magnet

Fig. 5-4

Wedge "a"

About 100°

Wedge "c"

6-pole magnet

CRT neck

40cm

Page 14

14GT15

1 2 3 4 5

14GT20

CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

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

3.0Vdc

IC801.(TP851)

Range : 1 V/Div (DC) Sweep : 5 msec/Div

1 V

SUB-BRIGHT-

NESS ADJUSMENT (I2C BUS CONTROL)

4. Adjust SCREEN VR ,so that the tip of signal reach

3.0 Vdc + 0.1 Vdc.

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 whereas line 4 is slightly brighter than line 1, 2

and 3 and finally line 5 will be the brighter than line 4.

WHITE BAL-

3 * 12300°K X: 0.272

ANCE 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 TP602 (-) and TP603 (+).

4. Check Beam current should be around 800 µA.

5. Set it to service mode and adjust the " WPG" (WhitePoint-G), "WPB" (White Point-B) data to

1, 2, 3 are in same black level.

Y: 0.275

(MINOLTA COLOUR ANALYZER CA-100) *Note: Above Data can be UP/

DOWN by Volume key. have a colour temperature of 12,300°K ( white ). * Note .

6. Receive "WHITE" pattern, with BURST signal, and set Brightness Y by generator, to **10cd/m

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.

Maximum beam check

Note: This adjustment must be done after

warming up the unit for 30 minutes or longer with a beam current over 500µA).

* Adjust DRI-GC/GW, DRI-BC/BW as following

data, after finishing DRI-GS and DRI-BS: DRIGC=DRI-GW="DRI-GS"-7:DRI-BW="DRI-BS"7:DRI-RC=25:DRI-BC=DRI-BS:DRI-RW=32

** Low=10cd/m2:High=200cd/m

1. Receive the "Monoscope Pattern" signal.

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

3. Connect the DC miliammeter between TP603 (+) and TP602 (–). (Full Scale: 3 mA Range)

4. Beam current must be within 800 ± 100 µA.

Page 15

14GT15

Y 100%W

75%

Mg R

14GT20

HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

V-SLOPE (I2C

BUS CONTROL)

V-SHIFT 50

(I2C BUS CONTROL)

V - AMP 50 (I2C BUS CONTROL)

S-CORRECTION (I2C BUS CONTROL)

H - SHIFT (50)

(H-CENTER) (I2C BUS CONTROL)

SUB-SHARP-

NESS

1. Receive 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.

1. Call the "V-CENT" mode.

2. Increase or decrease "V-CENT" by Volume key till the picture is centered.

1. Call the "V-AMP" mode.

2. Increase or decrease "V - AMP" by Volume key to set overscan of 9.5% typical. Adjustment Spec 9.5% range +1% -0%.

FIXED DATA, NO NEED TO ADJUST.

1. Call the "H-CENT" mode.

2. Increase or decrease "H-CENT" by Volume key to center the picture horizontal.

1. Call the "SUB-SHP" mode.

2. Set "SUB-SHP" to 20 by pressing volume down button.

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 focus.

PAL CHROMA ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

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 P AL Colour Bar be at the same level shown as Fig. 8.

5. Clear the SERVICE mode.

Fig. 8

Page 16

14GT15 14GT20

NTSC CHROMA ADJUSTMENT

No. Adjusting point Adjusting procedure/conditions Waveform and others

SUB-TINT (I2C

BUS CONTROL)

1. Receive the "NTSC3.58 Colour Bar" signal through A V in.

2. Connect the oscilloscope to TP853 (Pin (5) of P882) BLUE-OUT.

» Range : 100mV/div. (AC)(Use Probe 10:1) » Sweep time : 10 µsec/div.

3. Call the "SUB-TINT" mode in service mode. Adjust the "SUB-TINT" bus data to obtain the waveform shown as Fig. 9.

4. Clear the SERVICE mode.

(SAME LEVEL)

WYCy G Mg R

Fig. 9

PROTECTOR OPERATION CHECKING

No. Adjusting point Adjusting procedure/conditions Waveform and others

BEAM PRO-

1 * Select one of Q883/5/7 to do

TECTOR

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.

each short test.

H, V PROTEC-

TOR

Other

protectors

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 is work.

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

No. Adjusting point Adjusting procedure/conditions Waveform and others

VIDEO AND

AUDIO OUTPUT CHECK

1. Receive the "PAL Color Bar" signal (100% White Color Bar, Sound 400 Hz 100% Mod.)

2. Terminate the V ideo 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 10k ohm impedance. Make sure the output is as specified (1.76 Vp-p ±3 dB).

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, A V1, AV2 & TV again and the video & audio output are according to the input terminal for each mode.

Page 17

FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)

No. Adjusting point Adjusting procedure/conditions Waveform and others

14GT15 14GT20

CONTRAST

key

COLOUR key

BRIGHTNESS

key

TINT key 1. Receive the "NTSC Colour Bar" signal thru AV in.

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.

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.

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.

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.

SHARPNESS

Key

CH DISPLAY

COLOUR

NORMAL Key7

WHITE TEMP 1. Receive "Monoscope Pattern" signal.

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.

1. All Ch (1~99) will have an OSD display of the channel number in green colour under AFT ON condition.

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

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.

Notes:If nothing is display

mean contrast, colour, bright, tint, sharpness are all in normal setting.

Page 18

14GT15 14GT20

FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)

(Continued)

No. Adjusting point Adjusting procedure/conditions Waveform and others

COLOUR

SYSTEM

SOUND

10 1. Receive "PAL-B/G" signal, and check the sound

SYSTEM

NOISE MUTE

CHECKING

1. Receive the "PAL COLOUR BAR" signal, press the COLOUR SYSTEM key to select modes except P AL, 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 through 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.

output is working properly or not.

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.

OSD LANGUAGE QUANTITY CHECK

Check OSD LANGUAGE quantity and type as below: ENGLISH, THAI.

HEADPHONE JACK CHECKING (FOR B & C MODELS ONLY)

No. Adjusting point Adjusting procedure/conditions Waveform and others

HEADPHONE

OUTPUT CHECKING

1. Receive PAL COLOUR P AR with SOUND 400Hz, 100% MODULATION (±50kHz Dev).

2. Maximum volume, and check the headphone output with 400Hz sound and no sound out from speaker.

Page 19

MEMORY MAP

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

00 PASS WORD 55 00-FF 01 PASS WORD 4F 00-FF 02 PASS WORD 43 00-FF 03 PASS WORD A1 00-FF 04 05 06 AGC TAKE-OVER 0E 00-3F 07 V-SLOPE 20 00-3F 08 V-AMPLITUDE 20 00-3F 09 V-CENTER 20 00-3F 0A H-CENTER 20 00-3F

0B H-SIZE 20 00-3F 0C EW-PARALLELOGRAM 20 00-3F 0D EW-PARABOLA/WIDTH 20 00-3F 0E EW-UPPER CORNER 20 00-3F 0F EW-LOWER CORNER 20 00-3F

10 EW-TRAPEZIUM 20 00-3F

11 HORIZONTAL-BOW 20 00-3F

12 S-CORRECTION 00 00-3F

16 DRIVER-R (STANDARD) 20 00-3F

17 DRIVER-G (STANDARD) 20 00-3F

18 DRIVER-B (STANDARD) 20 00-3F

19 DRIVER-R (WARM) 20 00-3F 1A DRIVER-G (WARM) 20 00-3F 1B DRIVER-B (WARM) 20 00-3F 1C DRIVER-R (COOL) 19 00-3F 1D DRIVER-G (COOL) 20 00-3F 1E DRIVER-G (COOL) 20 00-3F 1F

22 SUB-VOLUME 3F 00-3F

23 SUB-CONTRAST 3F 00-3F

24 SUB-COLOUR 20 00-3F

25 SUB-BRIGHTNESS 20 00-3F

26 SUB-TINT 20 00-3F

27 SUB-SHARPNESS 20 00-3F

28 HTL-VOLUME 20 00-3F

29 HTL-POSITION FF 00-3F 2A 2B 2C 2D OSD-ENCEREFER 20 00-3F 2E CUTOFF LEVEL-OFFSET R 08 00-3F 2F CUTOFF LEVEL-OFFSET B 08 00-3F

30 CATHODE DRIVE LEVEL 00 00-3F

31 Y-DELAY (TV PAL) 0C 00-3F

32 Y-DELAY (TV SECAM) 0F 00-3F

33 Y-DELAY (TV N358) 0C 00-3F

34 Y-DELAY (TV N443) 0C 00-3F

35 Y-DALAY (TV BW) 0C 00-3F

36 Y-DELAY (AV PAL) 0C 00-3F

37 Y-DELAY (AV SECAM) 0F 00-3F

38 Y-DELAY (AV N443) 0C 00-3F

39 Y-DELAY (AV N358) 0F 00-3F 3A Y-DELAY (AV BW) 0C 00-3F 3B COLOUR-OFFSET (PAL) 08 00-3F 3C COLOUR-OFFSET (SECAM) 08 00-3F 3D COLOUR-OFFSET (N443) 04 00-3F 3E COLOUR-OFFSET (N358) 04 00-3F 3F SHARPNESS-OFFSET (PAL) 08 00-3F

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

14GT15 14GT20

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 20

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

40 SHARPNESS-OFFSET (SECAM) 04 00-0F 41 SHARPNESS-OFFSET (N443) 0C 00-0F 42 SHARPNESS-OFFSET (N358) 08 00-0F 43 44 FCO ACL OSO EHT EVG FFI AVL BKS 00-FF 45 SCM N443 N358 PB-SEC BG I DK M 00-FF 46 SM FMWS AV BTSC HTL VMC VMI 00-FF 47 HP2 FSL RUS FRA CHN MLY ARB THA 00-FF 48 AGC BIL OBA 00-FF

49 4A 4B 4C VOLUME 01 00-3C 4D CONTRAST 3C 00-3C 4E COLOUR 1E 00-3C

4F BRIGHTNESS 1E 00-3C

50 TINT 1E 00-3C

51 SHARPNESS 1E 00-3C

55 POSITION/AV1/AV2 01 00-FF

56 F AV-POS A 0A 00-FF

57 FAV-POS B 14 00-FF

58 FAV-POS C 1E 00-FF

59 FAV-POS D 28 00-FF 5A 5B 5C POWER 00 00-01 5D WHITE-TEMP 00 00-02 5E BLUE BACK 00 00-01

5F LANGUAGE 00 00-07

60 DIGIT 00 00-01

62 SKIP 0 SKIP 1 SKIP 2 SKIP 3 SKIP 4 SKIP 5 SKIP 6 SKIP 7 80 00-FF

63 SKIP 8 SKIP 9 SKIP 10 SKIP 11 SKIP 12 SKIP 13 SKIP 14 SKIP 15 00 00-FF

64 SKIP 16 SKIP 17 SKIP 18 SKIP 19 SKIP 20 SKIP 21 SKIP 22 SKIP 23 00 00-FF

65 SKIP 24 SKIP 25 SKIP 26 SKIP 27 SKIP 28 SKIP 29 SKIP 30 SKIP 31 00 00-FF

66 SKIP 32 SKIP 33 SKIP 34 SKIP 35 SKIP 36 SKIP 37 SKIP 38 SKIP 39 00 00-FF

67 SKIP 40 SKIP 41 SKIP 42 SKIP 43 SKIP 44 SKIP 45 SKIP 46 SKIP 47 00 00-FF

68 SKIP 48 SKIP 49 SKIP 50 SKIP 51 SKIP 52 SKIP 53 SKIP 54 SKIP 55 00 00-FF

69 SKIP 56 SKIP 57 SKIP 58 SKIP 59 SKIP 60 SKIP 61 SKIP 62 SKIP 63 00 00-FF 6A SKIP 64 SKIP 65 SKIP 66 SKIP 67 SKIP 68 SKIP 69 SKIP 70 SKIP 71 00 00-FF 6B SKIP 72 SKIP 73 SKIP 74 SKIP 75 SKIP 76 SKIP 77 SKIP 78 SKIP 79 00 00-FF 6C SKIP 80 SKIP 81 SKIP 82 SKIP 83 SKIP 84 SKIP 85 SKIP 86 SKIP 87 00 00-FF 6D SKIP 88 SKIP 89 SKIP 90 SKIP 91 SKIP 92 SKIP 93 SKIP 94 SKIP 95 00 00-FF 6E SKIP 96 SKIP 97 SKIP 98 SKIP 99 00 00-FF

74 TUNING FREQUENCY (HIGHER PART) S-SYS POS 0

75 TUNING FREQUENCY (LOWER PART) 000:BG

76 S-SYS AFT (auto) C-SYS 001:I

77 TUNING FREQUENCY (HIGHER PART) 010:DK POS 1

78 TUNING FREQUENCY (LOWER PART) 011:M

79 S-SYS AFT (auto) C-SYS 7A TUNING FREQUENCY (HIGHER PART) AFT POS 2 7B TUNING FREQUENCY (LOWER PART) 0:OFF 7C S-SYS AFT (auto) C-SYS 1:ON 7D TUNING FREQUENCY (HIGHER PART) POS 3 7E TUNING FREQUENCY (LOWER PART)

7F S-SYS AFT (auto) C-SYS

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 21

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

80 TUNING FREQUENCY (HIGHER PART) POS 4 81 TUNING FREQUENCY (LOWER PART) 82 S-SYS AFT (auto) C-SYS 83 TUNING FREQUENCY (HIGHER PART) POS 5 84 TUNING FREQUENCY (LOWER PART) 85 S-SYS AFT (auto) C-SYS 86 TUNING FREQUENCY (HIGHER PART) POS 6 87 TUNING FREQUENCY (LOWER PART) 88 S-SYS AFT (auto) C-SYS

89 TUNING FREQUENCY (HIGHER PART) POS 7 8A TUNING FREQUENCY (LOWER PART) 8B S-SYS AFT (auto) C-SYS 8C TUNING FREQUENCY (HIGHER PART) POS 8 8D TUNING FREQUENCY (LOWER PART) 8E S-SYS AFT (auto) C-SYS 8F TUNING FREQUENCY (HIGHER PART) POS 9

90 TUNING FREQUENCY (LOWER PART)

91 S-SYS AFT (auto) C-SYS

92 TUNING FREQUENCY (HIGHER PART) POS 10

93 TUNING FREQUENCY (LOWER PART)

94 S-SYS AFT (auto) C-SYS

95 TUNING FREQUENCY (HIGHER PART) POS 11

96 TUNING FREQUENCY (LOWER PART)

97 S-SYS AFT (auto) C-SYS

98 TUNING FREQUENCY (HIGHER PART) POS 12

99 TUNING FREQUENCY (LOWER PART) 9A S-SYS AFT (auto) C-SYS 9B TUNING FREQUENCY (HIGHER PART) POS 13 9C TUNING FREQUENCY (LOWER PART) 9D S-SYS AFT (auto) C-SYS 9E TUNING FREQUENCY (HIGHER PART) POS 14 9F TUNING FREQUENCY (LOWER PART) A0 S-SYS AFT (auto) C-SYS A1 TUNING FREQUENCY (HIGHER PART) POS 15 A2 TUNING FREQUENCY (LOWER PART) A3 S-SYS AFT (auto) C-SYS A4 TUNING FREQUENCY (HIGHER PART) POS 16 A5 TUNING FREQUENCY (LOWER PART) A6 S-SYS AFT (auto) C-SYS A7 TUNING FREQUENCY (HIGHER PART) POS 17 A8 TUNING FREQUENCY (LOWER PART) A9 S-SYS AFT (auto) C-SYS AA TUNING FREQUENCY (HIGHER PART) POS 18 AB TUNING FREQUENCY (LOWER PART) AC S-SYS AFT (auto) C-SYS AD TUNING FREQUENCY (HIGHER PART) POS 19 AE TUNING FREQUENCY (LOWER PART) AF S-SYS AFT (auto) C-SYS B0 TUNING FREQUENCY (HIGHER PART) POS 20 B1 TUNING FREQUENCY (LOWER PART) B2 S-SYS AFT (auto) C-SYS B3 TUNING FREQUENCY (HIGHER PART) POS 21 B4 TUNING FREQUENCY (LOWER PART) B5 S-SYS AFT (auto) C-SYS B6 TUNING FREQUENCY (HIGHER PART) POS 22 B7 TUNING FREQUENCY (LOWER PART) B8 S-SYS AFT (auto) C-SYS B9 TUNING FREQUENCY (HIGHER PART) POS 23 BA TUNING FREQUENCY (LOWER PART) BB S-SYS AFT (auto) C-SYS BC TUNING FREQUENCY (HIGHER PART) POS 24 BD TUNING FREQUENCY (LOWER PART) BE S-SYS AFT (auto) C-SYS BF TUNING FREQUENCY (HIGHER PART) POS 25

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 22

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

C0 TUNING FREQUENCY (LOWER PART) C1 S-SYS AFT (auto) C-SYS C2 TUNING FREQUENCY (HIGHER PART) POS 26 C3 TUNING FREQUENCY (LOWER PART) C4 S-SYS AFT (auto) C-SYS C5 TUNING FREQUENCY (HIGHER PART) POS 27 C6 TUNING FREQUENCY (LOWER PART) C7 S-SYS AFT (auto) C-SYS C8 TUNING FREQUENCY (HIGHER PART) POS 28 C9 TUNING FREQUENCY (LOWER PART) CA S-SYS AFT (auto) C-SYS CB TUNING FREQUENCY (HIGHER PART) POS 29 CC TUNING FREQUENCY (LOWER PART) CD S-SYS AFT (auto) C-SYS CE TUNING FREQUENCY (HIGHER PART) POS 30 CF TUNING FREQUENCY (LOWER PART) D0 S-SYS AFT (auto) C-SYS D1 TUNING FREQUENCY (HIGHER PART) POS 31 D2 TUNING FREQUENCY (LOWER PART) D3 S-SYS AFT (auto) C-SYS D4 TUNING FREQUENCY (HIGHER PART) POS 32 D5 TUNING FREQUENCY (LOWER PART) D6 S-SYS AFT (auto) C-SYS D7 TUNING FREQUENCY (HIGHER PART) POS 33 D8 TUNING FREQUENCY (LOWER PART) D9 S-SYS AFT (auto) C-SYS DA TUNING FREQUENCY (HIGHER PART) POS 34 DB TUNING FREQUENCY (LOWER PART) DC S-SYS AFT (auto) C-SYS DD TUNING FREQUENCY (HIGHER PART) POS 35 DE TUNING FREQUENCY (LOWER PART) DF S-SYS AFT (auto) C-SYS E0 TUNING FREQUENCY (HIGHER PART) POS 36 E1 TUNING FREQUENCY (LOWER PART) E2 S-SYS AFT (auto) C-SYS E3 TUNING FREQUENCY (HIGHER PART) POS 37 E4 TUNING FREQUENCY (LOWER PART) E5 S-SYS AFT (auto) C-SYS E6 TUNING FREQUENCY (HIGHER PART) POS 38 E7 TUNING FREQUENCY (LOWER PART) E8 S-SYS AFT (auto) C-SYS E9 TUNING FREQUENCY (HIGHER PART) POS 39 EA TUNING FREQUENCY (LOWER PART) EB S-SYS AFT (auto) C-SYS EC TUNING FREQUENCY (HIGHER PART) POS 40 ED TUNING FREQUENCY (LOWER PART) EE S-SYS AFT (auto) C-SYS EF TUNING FREQUENCY (HIGHER PART) POS 41

F0 TUNING FREQUENCY (LOWER PART) F1 S-SYS AFT (auto) C-SYS F2 TUNING FREQUENCY (HIGHER PART) POS 42 F3 TUNING FREQUENCY (LOWER PART) F4 S-SYS AFT (auto) C-SYS F5 TUNING FREQUENCY (HIGHER PART) POS 43 F6 TUNING FREQUENCY (LOWER PART) F7 S-SYS AFT (auto) C-SYS F8 TUNING FREQUENCY (HIGHER PART) POS 44

F9 TUNING FREQUENCY (LOWER PART) FA S-SYS AFT (auto) C-SYS FB TUNING FREQUENCY (HIGHER PART) POS 45 FC TUNING FREQUENCY (LOWER PART) FD S-SYS AFT (auto) C-SYS FE FF

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 23

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

100 POS 46 101 TUNING FREQUENCY (HIGHER PART) POS 47 102 TUNING FREQUENCY (LOWER PART) 103 S-SYS AFT (auto) C-SYS 104 TUNING FREQUENCY (HIGHER PART) POS 48 105 TUNING FREQUENCY (LOWER PART) 106 S-SYS AFT (auto) C-SYS 107 TUNING FREQUENCY (HIGHER PART) POS 49 108 TUNING FREQUENCY (LOWER PART) 109 S-SYS AFT (auto) C-SYS 10A TUNING FREQUENCY (HIGHER PART) POS 50

10B TUNING FREQUENCY (LOWER PART) 10C S-SYS AFT (auto) C-SYS 10D TUNING FREQUENCY (HIGHER PART) POS 51

10E TUNING FREQUENCY (LOWER PART)

10F S-SYS AFT (auto) C-SYS

110 TUNING FREQUENCY (HIGHER PART) POS 52

111 TUNING FREQUENCY (LOWER PART)

112 S-SYS AFT (auto) C-SYS

113 TUNING FREQUENCY (HIGHER PART) POS 53

114 TUNING FREQUENCY (LOWER PART)

115 S-SYS AFT (auto) C-SYS

116 TUNING FREQUENCY (HIGHER PART) POS 54

117 TUNING FREQUENCY (LOWER PART)

118 S-SYS AFT (auto) C-SYS

119 TUNING FREQUENCY (HIGHER PART) POS 55

11A TUNING FREQUENCY (LOWER PART)

11B S-SYS AFT (auto) C-SYS

11C TUNING FREQUENCY (HIGHER PART) POS 56

11D TUNING FREQUENCY (LOWER PART)

11E S-SYS AFT (auto) C-SYS

11F TUNING FREQUENCY (HIGHER PART) POS 57

120 TUNING FREQUENCY (LOWER PART)

121 S-SYS AFT (auto) C-SYS

122 TUNING FREQUENCY (HIGHER PART) POS 58

123 TUNING FREQUENCY (LOWER PART)

124 S-SYS AFT (auto) C-SYS

125 TUNING FREQUENCY (HIGHER PART) POS 59

126 TUNING FREQUENCY (LOWER PART)

127 S-SYS AFT (auto) C-SYS

128 TUNING FREQUENCY (HIGHER PART) POS 60

129 TUNING FREQUENCY (LOWER PART)

12A S-SYS AFT (auto) C-SYS

12B TUNING FREQUENCY (HIGHER PART) POS 61 12C TUNING FREQUENCY (LOWER PART) 12D S-SYS AFT (auto) C-SYS

12E TUNING FREQUENCY (HIGHER PART) POS 62

12F TUNING FREQUENCY (LOWER PART)

130 S-SYS AFT (auto) C-SYS

131 TUNING FREQUENCY (HIGHER PART) POS 63

132 TUNING FREQUENCY (LOWER PART)

133 S-SYS AFT (auto) C-SYS

134 TUNING FREQUENCY (HIGHER PART) POS 64

135 TUNING FREQUENCY (LOWER PART)

136 S-SYS AFT (auto) C-SYS

137 TUNING FREQUENCY (HIGHER PART) POS 65

138 TUNING FREQUENCY (LOWER PART)

139 S-SYS AFT (auto) C-SYS

13A TUNING FREQUENCY (HIGHER PART) POS 66

13B TUNING FREQUENCY (LOWER PART) 13C S-SYS AFT (auto) C-SYS 13D TUNING FREQUENCY (HIGHER PART) POS 67

13E TUNING FREQUENCY (LOWER PART)

13F S-SYS AFT (auto) C-SYS

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 24

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

140 TUNING FREQUENCY (HIGHER PART) POS 68 141 TUNING FREQUENCY (LOWER PART) 142 S-SYS AFT (auto) C-SYS 143 TUNING FREQUENCY (HIGHER PART) POS 69 144 TUNING FREQUENCY (LOWER PART) 145 S-SYS AFT (auto) C-SYS 146 TUNING FREQUENCY (HIGHER PART) POS 70 147 TUNING FREQUENCY (LOWER PART) 148 S-SYS AFT (auto) C-SYS 149 TUNING FREQUENCY (HIGHER PART) POS 71 14A TUNING FREQUENCY (LOWER PART) 14B S-SYS AFT (auto) C-SYS 14C TUNING FREQUENCY (HIGHER PART) POS 72 14D TUNING FREQUENCY (LOWER PART) 14E S-SYS AFT (auto) C-SYS 14F TUNING FREQUENCY (HIGHER PART) POS 73 150 TUNING FREQUENCY (LOWER PART) 151 S-SYS AFT (auto) C-SYS 152 TUNING FREQUENCY (HIGHER PART) POS 74 153 TUNING FREQUENCY (LOWER PART) 154 S-SYS AFT (auto) C-SYS 155 TUNING FREQUENCY (HIGHER PART) POS 75 156 TUNING FREQUENCY (LOWER PART) 157 S-SYS AFT (auto) C-SYS 158 TUNING FREQUENCY (HIGHER PART) POS 76 159 TUNING FREQUENCY (LOWER PART) 15A S-SYS AFT (auto) C-SYS 15B TUNING FREQUENCY (HIGHER PART) POS 77 15C TUNING FREQUENCY (LOWER PART) 15D S-SYS AFT (auto) C-SYS 15E TUNING FREQUENCY (HIGHER PART) POS 78 15F TUNING FREQUENCY (LOWER PART) 160 S-SYS AFT (auto) C-SYS 161 TUNING FREQUENCY (HIGHER PART) POS 79 162 TUNING FREQUENCY (LOWER PART) 163 S-SYS AFT (auto) C-SYS 164 TUNING FREQUENCY (HIGHER PART) POS 80 165 TUNING FREQUENCY (LOWER PART) 166 S-SYS AFT (auto) C-SYS 167 TUNING FREQUENCY (HIGHER PART) POS 81 168 TUNING FREQUENCY (LOWER PART) 169 S-SYS AFT (auto) C-SYS 16A TUNING FREQUENCY (HIGHER PART) POS 82 16B TUNING FREQUENCY (LOWER PART) 16C S-SYS AFT (auto) C-SYS 16D TUNING FREQUENCY (HIGHER PART) POS 83 16E TUNING FREQUENCY (LOWER PART) 16F S-SYS AFT (auto) C-SYS 170 TUNING FREQUENCY (HIGHER PART) POS 84 171 TUNING FREQUENCY (LOWER PART) 172 S-SYS AFT (auto) C-SYS 173 TUNING FREQUENCY (HIGHER PART) POS 85 174 TUNING FREQUENCY (LOWER PART) 175 S-SYS AFT (auto) C-SYS 176 TUNING FREQUENCY (HIGHER PART) POS 86 177 TUNING FREQUENCY (LOWER PART) 178 S-SYS AFT (auto) C-SYS 179 TUNING FREQUENCY (HIGHER PART) POS 87 17A TUNING FREQUENCY (LOWER PART) 17B S-SYS AFT (auto) C-SYS 17C TUNING FREQUENCY (HIGHER PART) POS 88 17D TUNING FREQUENCY (LOWER PART) 17E S-SYS AFT (auto) C-SYS 17F POS 89

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 25

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

180 POS 89

181

182 TUNING FREQUENCY (HIGHER PART) POS 90

183 TUNING FREQUENCY (LOWER PART)

184 S-SYS AFT (auto) C-SYS

185 TUNING FREQUENCY (HIGHER PART) POS 91

186 TUNING FREQUENCY (LOWER PART)

187 S-SYS AFT (auto) C-SYS

188 TUNING FREQUENCY (HIGHER PART) POS 92

189 TUNING FREQUENCY (LOWER PART)

18A S-SYS AFT (auto) C-SYS

18B TUNING FREQUENCY (HIGHER PART) POS 93 18C TUNING FREQUENCY (LOWER PART) 18D S-SYS AFT (auto) C-SYS

18E TUNING FREQUENCY (HIGHER PART) POS 94

18F TUNING FREQUENCY (LOWER PART)

190 S-SYS AFT (auto) C-SYS

191 TUNING FREQUENCY (HIGHER PART) POS 95

192 TUNING FREQUENCY (LOWER PART)

193 S-SYS AFT (auto) C-SYS

194 TUNING FREQUENCY (HIGHER PART) POS 96

195 TUNING FREQUENCY (LOWER PART)

196 S-SYS AFT (auto) C-SYS

197 TUNING FREQUENCY (HIGHER PART) POS 97

198 TUNING FREQUENCY (LOWER PART)

199 S-SYS AFT (auto) C-SYS

19A TUNING FREQUENCY (HIGHER PART) POS 98

19B TUNING FREQUENCY (LOWER PART) 19C S-SYS AFT (auto) C-SYS 19D TUNING FREQUENCY (HIGHER PART) POS 99

19E TUNING FREQUENCY (LOWER PART)

19F S-SYS AFT (auto) C-SYS

1A0 AV 1

1A1

1A2 (auto) C-SYS

1A3 AV2

1A4

1A5 (auto) C-SYS

1A6

1A7

1A8

1A9 1AA 1AB 1AC 1AD 1AE 1AF

1B0

1B1

1B2

1B3

1B4

1B5

1B6

1B7

1B8

1B9 1BB 1BB 1BC 1BD 1BE 1BF

MODEL MODEL

DATA MICON

DEFAULT RANGE

E2PROM E2PROM

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 26

14GT15 14GT20

ADDRESS

(HEX) D7 D6 D5 D4 D3 D2 D1 D0

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 MODEL

DATA MICON

E2PROM E2PROM

DEFAULT RANGE

WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA

CHASSIS CTV FINAL

LAST INITIAL

REMARK

LETTER NO. LETTER NO.

Page 27

TROUBLE SHOOTING TABLE

NO RASTER

14GT15 14GT20

Check R701, R707 and D709.

Check D758, IC702 and IC753.

Check R618 and R615.

Check F701.

Check T701 pin (7) voltage (Approx. 310V at 220V AC)

Check Secondary Main+B (Pin (17) of T701 voltage:Approx. 115V)

Check CRT connector K1-K5 bias.

Check C878.

Check IC801.

Blown out.

Replace the fuse.

The fuse is again blown out.

Check IC701, D701,C707 and D710.

D1001 (Power LED Green) turns on.

D1001 (Power LED Red) turns on or turns ON/OFF.

Checking the protector circuit.

Does horizontal circuit oscillate ?

Check IC751 and IC801.

Page 28

14GT15 14GT20

TROUBLE SHOOTING TABLE

CIRCUITS TO BE CHECKED:

» Tuner. » PIF. » Automatic Gain Control. » (5V), (32V) Power Source.

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.

(Continued)

NO PICTURE, NO SOUND

Does the noise level increase at max. Contrast, Brightness and Sound controls ?

Does noise or signal appear at pin (40) of IC801 ?

Does noise or signal appear at pin (38) of IC801 ?

No snow noise.

Check IC801 and its related circuit.

Check pin(38) of IC801.

CIRCUITS TO BE CHECKED:

» Sound system pins (28) and (44) of IC801.

» Sound Detector Circuit. » Sound Switch and Att.

Control. » Audio Output Circuit.

Check pin (27) of IC801, Tuner and related circuit.

NO SOUND

Does noise signal appear at pin (44) of IC801 ?

Does signal appear at pins (6) and (8) of IC301 ?

Check Q205 and related circuit.

Check pin (1) of SF201 and Tuner related circuit. Check pin (37)of IC801 and related circuit.

Does signal appear at pin(28) of IC801?

Check C356 and peripheral circuit.

CheckIC801.

Check P302 or P301 connector of IC301 and peripheral circuit.

Check Q301, pins(4) and (6) of IC801 and peripheral circuit.

Page 29

14GT15 14GT20

TROUBLE SHOOTING TABLE

HORIZONTAL SYNCHRONIZATION

CIRCUIT TO BE CHECKED:

» Sync. Separator Circuit.

DEFECTIVE VERTICAL AMP.

AND VERTICAL LINEARITY

(Continued)

NEITHER VERTICAL NOR

Check pins(16), (17) and (34) of IC801.

Readjust vertical size. (Bas Data)

Vertical linearity and size is abnormal.

Check R504, R503, R506, R513, C517 and D501.

NO VERTICAL SCAN

Check IC501.

Check IC501.Check C503 and C507.

Page 30

14GT15 14GT20

TROUBLE SHOOTING TABLE

Check IC801, R801, R802, R803, D804, D805, D806 and Q801.

(Continued)

NO SPECIFIC COLOUR

Is some colour produced in B/W broadcast reception ?

Is the white balance properly adjusted ?

Readjust the white balance.

Check Q871, Q883 and their adjacent circuits.

(NO COLOUR SYNCHRONIZATION)

Check Q870, Q885 and their adjacent circuits.

NO SPECIFIC COLOUR

“PAL”

Check IC801 and bias control circuit.

The picture colour is yellow.The picture colour is magenta.The picture colour is cyan.

Check Q872, Q887 and their adjacent circuits.

Check X1001.(12MHz)

Page 31

SOLID STATE DEVICE BASE DIAGRAM

TOP VIEW

14GT15 14GT20

M24C04W

64 33

132

iX3368CEN0

SIDE VIEW

COLLECTOR

BASE EMITTER

FX0008GE D601A

COLLECTOR

BASE EMITTER

2SC2735

COLLECTOR

:BG:

BASE EMITTER

B709A

+ ~ ~ -

BASE COLLECTOR EMITTER

2SC1815

BCE

2SD1877

BASE COLLECTOR EMITTER

2SC2482

PX0423CE

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

123 1 3

PST573J

123

KA7808 KA7805

SE115N

DX0386CE

112

TDA7056A

LA7016

TA48M033

STRF6653

2468

1357

TDA8357

Page 32

14GT15 14GT20

MODEL 14GT15 CHASSIS LAYOUT

1 2 3 4 5 6 7 8 9 10

Page 33

14GT15 14GT20

MODEL 14GT20 CHASSIS LAYOUT

1 2 3 4 5 6 7 8 9 10

Page 34

14GT15 14GT20

WAVEFORMS

Page 35

DESCRIPTION OF SCHEMATIC DIAGRAM

14GT15 14GT20

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 OP-

ERATING.

IMPORTANT SAFETY NOTICE:

PARTS MARKED WITH " å " ( ) ARE IMPOTANT 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 ( —– - —– ) IS DIRECTLY CONNECTED WITH AC MAINS VOLTAGE. WHEN SERVICING THE AREA, CONNECT AN ISOLA TING TRANSFORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINA TE HAZARD OF ELECTRIC SHOCK.

NOTES:

1. The unit of resistance "ohm" is omitted. (K = 1000 ohms, M = Mega ohm).

2. All resistors are 1/8 watt, unless otherwise noted.

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

VOLTAGE MEASUREMENT CONDITIONS:

1. Voltages in parenthesis measured with no signal.

2. Voltages without parenthesis measured with 3mV B & W or Colour signal.

3. All the voltages in each point are measured with VTVM.

WAVEFORM MEASUREMENT CONDITIONS:

1. The colour bar generator signal of 1.0V peak applied at pin (24) of IC201.

2. Approximately 4V AGC bias .

Page 36

14GT15 14GT20

■ Infrared Remote Control Unit

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

RRMCG0025KJSA

1 2 3 4 5 6 7 8 9 10

Page 37

14GT15

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

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

R143

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

C128

4p CH

C126

0.3p CH ± 0.1p

L112

Q201

S594

C208

102B

C210

24p ± 3

R206

33k

L206

D202

IT402

L205

R204

R203

C209

1.5p CH

J201

J202

C312

472B

R311

10k

C212

0.9p ± 0.1

C261

102B

L207

D203

IT402

R207

33k

C211

24p ± 3

C122

102B

C151

102B

J301

C214

105p

D109

IT402

C118

1p CH

±0.1p

D108

IT407

R144

47k

C310

103B

J302

C301

103B

C353

102

R147

100

T301

R306

C119

103B

D107

HSC277

L114

D301

1SS355

R117 47k

R113

10k

R120

L115

C120

103B

C127

102B

R303

220

R302

220

R301

220

2000p

22p

AS SDA

SCL

5V(MB)

2000p

5V(BP)

32V(BT)

J303

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

L151

R171

47k

L152

C156

82p CH

R174

D153

HSC277

D152

HSC277

R156

C155

103B

C352

103B

R175

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

C302

8p CH

IC301

IX2145

C303

102Y

14GT20

■ TUNER

åå

å VTUVTST5HD84/

åå

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

1 2 3 4 5 6 7 8 9 10

Page 38

14GT15 14GT20

14GT15 , 14GT20 HOTEL MODE APPLICATION

How to enable/disable the "Hotel Mode" ? Ans: a) Press the R/C (FUNCTION) key until language selection appear,within five second press the (one/two

digit) key and keep pressing it for five second, then you can see the hotel mode with four digits password.

b) Key in the four digits password starting with number "1", "3", "7", "9", then the hotel mode will be enable,

you can switch on/off the hotel mode by using R/C (volume up/down) key.

HOTEL ON PASSWORD ****

* We recommend

Before set the hotel mode, it is better to choose ch 1 & set s-vol level Up to 75% full scale. After set hotel mode, starting channel will be always ch 1 & maximum sound level out will 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)

Set vol up/down by R/C key.

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

#1Ch 1 is your selected channel

for hotel mode.

CONDITION:

When using hotel mode, user can control "contrast", "brightness", "sharpness" and "tint" function. But after power off, it will return to the initial setting. You can't use:--

Preset mode

Fine tuning

Skip mode

System selection

The others function is allowed to be used.

Page 39

SCHEMATIC DIAGRAM:

14GT15 14GT20

MODEL 14GT20 HEAD PHONE Unit

CRT SOCKET Unit

1 2 3 4 5 6 7 8 9 10

Page 40

14GT15 14GT20

SCHEMATIC DIAGRAM: MODEL 14GT15 MAIN Unit

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

Page 41

14GT15 14GT20

SCHEMATIC DIAGRAM: MODEL 14GT20 MAIN Unit

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

Page 42

14GT15 14GT20

BLOCK DIAGRAM - 1/3:M0DEL 14GT15 MAIN BLOCK

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

Page 43

14GT15 14GT20

BLOCK DIAGRAM - 2/3:M0DEL 14GT20 MAIN BLOCK

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

Page 44

14GT15 14GT20

BLOCK DIAGRAM - 3/3:

MODEL 14GT20 HEAD PHONE BLOCK

CRT BLOCK

1 2 3 4 5 6 7 8 9 10

Page 45

PRINTED WIRING BOARD ASSEMBLIES

14GT15 14GT20

PWB-B: CRT Socket Unit (Wiring Side)

PWB-C: HEAD PHOME Unit (MODEL 14GT20)

(Wiring Side) (Component Side)

1 2 3 4 5 6 7 8 9 10

Page 46

14GT15 14GT20

PWB-A: MAIN Unit (Wiring Side)

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

Page 47

14GT15 14GT20

PWB-A: MAIN Unit (Component Side)

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

Page 48

14GT15 14GT20

PARTS LIST

PARTS REPLACEMENT

Ref. No. Part No. Description CodeRef. No. Part No. Description Code

IC801 RH-iX3368CEN1 R I.C. BE IC1002 VHiPST573J/-1 R I.C. AE IC1003 VHiM24C04W/-1 R I.C. AG IC1005 VHiKA7805Pi-1 R KIA7805PI AE

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 VB34JXV80X/*S Picture Tube å RCiLG0001KJZZ Degaussing Coil å L708 RCiLH0001KJZZ Deflection Yoke

PMAGF3041CEZZ R Magnet AG QEARC1431CEZZ Grounding Strap LHLDW0003PEKZ R ADG Coil Holder, x4 AB MSPRT0001PEFJ R Spring, Grounding Strap AC PSPAG0004KJZZ R Wedge(Gum), x3 AB

PRINTED WIRING BOARD ASSEMBLY

(NOT REPLACEMENT ITEM)

PWB-A DUNTK9988WET4 - Main Unit (14GT15) — PWB-A DUNTK9988WET3 - Main Unit (14GT20) — PWB-B DUNTK9990WET3 - CRT Socket Unit (14GT15) — PWB-B DUNTK9990WET2 - CRT Socket Unit (14GT20) — PWB-C DUNTK9989WET0 - Head Phone Unit (14GT20) —

PWB-A DUNTK9988WET3/T4

MAIN UNIT

TUNER AND ASSEMBLY

NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN

ASSEMBLY BUT INDEPENDENTLY.

å TU201 VTUVTST5HD84/ R VHF Tuner BB

INTEGRATED CIRCUITS

IC301 VHiTDA7056A-1 R TDA7056A AP IC304 VHiLA7016//-1 R LA7016(14GT20) AH IC402 VHiLA7016//-1 R LA7016(14GT20) AH IC501 VHiTDA8357/-1 R I.C. AN IC605 VHiKA7808Pi-1 R KIA7808PI AF IC701 VHiSTRF6653-1 R I.C. AS IC751 VHiTA48M033-1 R TA48M033F AH IC753 VHiSE115N//-1 R SE115N AF

Q201 VS2SC2735//1E R 2SC2735 AC

TRANSISTORS

Q203 VS2SD601AR/-1 R 2SD601AR AC Q205 VS2SC1815GW-1 R 2SC1815GW-1 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 VS2SD1877//1E R 2SD1877 AL 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

D201 RH-EX0676GEZZ R Zener Diode AA D301 VHD1SS119//-1 R 1SS119 AB D305 RH-EX0631GEZZ R Zener Diode AA D308 RH-EX0631GEZZ R Zener Diode(14GT20) AA D310 RH-DX0302CEZZ R Diode AC D401 RH-EX0631GEZZ R Zener Diode(14GT20) AA 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 Diode 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 Diode AD D604 VHD1SS119//-1 R 1SS119 AB D605 RH-EX0840CEZZ R Zener Diode AC D606 VHD1SS119//-1 R 1SS119 AB D607 RH-EX0662GEZZ R Zener Diode AB D608 RH-EX0604GEZZ R Zener Diode AB D609 VHD1SS119//-1 R 1SS119 AB D611 RH-DX0302CEZZ R Diode AC D612 RH-EX0627GEZZ R Zener Diode AA D613 VHD1SS119//-1 R 1SS119 AB D614 VHD1SS119//-1 R 1SS119 AB D701 RH-DX0386CEZZ R Diode AG D702 VHD1SS82///1A R 1SS82 AC D705 RH-DX0492CEZZ R Diode AE D706 VHD1SS82///1A R 1SS82 AC D707 VHD1SS82///1A R 1SS82 AC D708 RH-DX0400CEZZ R Diode AC D709 RH-DX0164CEZZ R Diode 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 Diode AD D715 RH-DX0055TAZZ R Diode AD D718 RH-EX0649GEZZ R Zener Diode AB D751 RH-DX0471CEZZ R Diode AE D752 VHD1SS119//-1 R 1SS119 AB D753 RH-DX0471CEZZ R Diode AE D758 RH-DX0461CEZZ R Diode AG D801 VHD1SS119//-1 R 1SS119 AB D802 VHD1SS119//-1 R 1SS119 AB D803 VHD1SS119//-1 R 1SS119 AB

Page 49

Ref. No. Part No. Description CodeRef. No. Part No. Description Code

D804 VHD1SS119//-1 R 1SS119 AB D805 VHD1SS119//-1 R 1SS119 AB D806 VHD1SS119//-1 R 1SS119 AB D1001 RH-PX0423CEZZ R PHOTODiode 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 J PC123FY8 AE

PACKAGED CIRCUITS

PR702 RMPTP0028CEZZ R Packaged Circuit AG

å VA700 RH-VX0047CEZZ R Varistor AF

X1001 RCRSB0281CEZZ R Crystal AG

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-XF6R8K0000 R Peaking 6.8µHAB L301 VP-DF1R0K0000 R Peaking 1µH(14GT20) AB L401 VP-DF1R0K0000 R Peaking 1µH(14GT20) AB L601 VP-CF1R0M0000 R Peaking 1µHAB L603 RCiLP0225CEZZ R Coil AF

å L702 RCiLF0019PEZZ R Coil 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

FILTER

CF202 RFiLC0335CEZZ Filter SF201 RFiLC0442CEZZ R Filter AL

TRANSFORMERS

å T602 RTRNF0187PEZZ H-Volt Transformer å T603 RTRNZ0179CEZZ R Transformer AE å T701 RTRNZ0140PEZZ R Transformer AQ

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 C301 VCEA0A1CW107M R 100 16V Electrolytic AC

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

(14GT20)

å C701 RC-FZ008SGEZZ R 0.1

14GT15 14GT20

C356 VCKYCY1HB682K R 6800p 50V Ceramic AA C359 VCEA9M1CW106M R 10 16V Electrolytic AB C360 VCEA9M1HW225M R 2.2 50V Electrolytic AB

C364 VCEA0A1CW106M R 10 16V Electrolytic AB C371 VCEA0A1CW476M R 47 16V Electrolytic AB C373 VCEA0A1CW107M R 100 16V Electrolytic AC

C374 VCEA0A1HW225M R 2.2 50V Electrolytic AB C375 VCEAEA1HW225M R 2.2 50V Electrolytic AB C377 VCEA0A1HW225M R 2.2 50V Electrolytic AB C379 VCEA0A1HW335M R 3.3 50V Electrolytic AB C390 VCEA0A1HW105M R 1 50V Electrolytic AB

C405 VCEA0A1CW107M R 100 16V Electrolytic AC C406 VCEA0A1CW477M R 470 16V Electrolytic AC

C407 VCEA0A1CW106M R 10 16V Electrolytic AB 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 M.Polypro AA 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 M.Polypro AD C611 VCKYPA2HB102K R 1000p 500V Ceramic AA C612 RC-EZ0724CEZZ R 100 160V Electrolytic AG C613 VCFPVC2DB914J 0.91 200V M.Polypro C614 RC-KZ0035CEZZ R 220p 50V Ceramic AB C615 VCFPVC2DB224J R 0.22 200V M.Polypro AE C616 VCFPPD3CA622H R 6200p 1600V M.Polypro AE 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

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-EZ1044CEZZ R 150 400V Electrolytic AM C708 RC-KZ0160GEZZ R 0.01 250V Ceramic AC C709 VCQYTA1HM471J R 470p 50V Mylar AB C711 RC-KZ0039CEZZ R 680p 2kV Ceramic AB

(14GT20)

(14GT20) (14GT20) (14GT20) (14GT20) (14GT20)

(14GT20)

AC250V

M.Polypro AD

Page 50

14GT15 14GT20

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 C759 VCKYPA1HB102K R 1000p 50V Ceramic AA C760 RC-KZ0039CEZZ R 680p 2kV Ceramic AB C761 RC-EZ0724CEZZ R 100 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 M.Polypro AB C813 VCFYFA1HA224J R 0.22 50V M.Polypro AB 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 M.Polypro AC C1016 VCQYTA1HM104J R 0.1 50V Mylar AA C1018 VCKYCY1HB221K R 220p 50V Ceramic AA C1019 VCEA9M1HW225M R 2.2 50V Electrolytic AB

RESISTORS

JA211 VRD-RA2BE102J R 1k 1/8W Carbon 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-CY1JF153J R 15k 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 R301 VRS-CY1JF680J R 68 1/16W Metal Oxide AA

(14GT20)

Ref. No. Part No. Description CodeRef. No. Part No. Description Code

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 R341 VRS-CY1JF332J R 3.3k 1/16W Metal Oxide AA

(14GT20)

R342 VRS-CY1JF564J R 560k 1/16W Metal Oxide AA

(14GT20) 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 R403 VRS-CY1JF101J R 100 1/16W Metal Oxide AA

(14GT20) R404 VRD-RA2BE820J R 82 1/8W Carbon AA

(14GT20) R406 VRS-CY1JF103J R 10k 1/16W Metal Oxide AA R407 VRS-CY1JF101J R 100 1/16W Metal Oxide AA

(14GT20) 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-RM2HD2R2J R 2.2 1/2W Carbon AA R504 VRD-RM2HD150J R 15 1/2W Carbon AA R505 VRD-RM2HD330J R 33 1/2W Carbon AA R506 VRD-RA2BE124J R 120k 1/8W Carbon AA R508 VRD-RM2HD221J R 220 1/2W Carbon AA R509 VRD-RM2HD1R0J R 1.0 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-VV3AB1R5J R 1.5 1W Metal Film AA 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 R607 VRS-CY1JF102J R 1k 1/16W Metal Oxide AA R608 VRS-CY1JF123J R 12k 1/16W Metal Oxide AA R609 VRD-RA2BE273G R 27k 1/8W Carbon AA R610 VRD-RA2BE153J R 15k 1/8W Carbon AA R611 VRD-RA2EE823G R 82k 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 3.0W 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-KA3HG4R7K R 4.7 5W Metal Oxide AD R619 VRD-RM2HD682J R 6.8k 1/2W Carbon AA R622 VRD-RM2HD820J R 82 1/2W Carbon 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 R627 VRD-RM2HD4R7J R 4.7 1/2W Carbon AA R628 VRD-RM2HD470J R 47 1/2W Carbon AA 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 R637 VRD-RM2HD820J R 82 1/2W Carbon AA R638 VRS-CY1JF333J R 33k 1/16W Metal Oxide AA

Page 51

R701 VRW-KQ3NC3R9K R 3.9 7W Cement AE R703 VRS-KT3LB473J R 47k 3W Metal Oxide AE

å R704 VRG-PD2HD150J R 15 1/2W Fuse Resistor 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-PD2HD4R7J R 4.7 1/2W Fuse Resistor 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 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

SWITCH

å S701 QSW-P0591CEZZ R Switch AQ

S1001 QSW-K0077GEZZ R Switch AB S1002 QSW-K0077GEZZ R Switch AB S1003 QSW-K0077GEZZ R Switch AB

14GT15 14GT20

Ref. No. Part No. Description CodeRef. No. Part No. Description Code

S1004 QSW-K0077GEZZ R Switch AB S1005 QSW-K0077GEZZ R Switch AB

MISCELLANEOUS PARTS

å ACC701QACCZ3008PEZZ R AC Cord AN å F701 QFS-C3229CEZZ R Fuse, T3.15A/250V AD

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

å FH701 QFSHD1014CEZZ R Fuse Holder AC å FH702 QFSHD1013CEZZ R Fuse Holder AC

J402 QJAKE0158CEZZ R Jack(14GT20) AF J403 QJAKE0159CEZZ R Jack(14GT20) AF J405 QJAKH0011AJZZ R Jack AK P1001 QPLGN0541CEZZ R Plug AB P1002 QPLGN0541CEZZ R Plug AB P302 QPLGN0241CEZZ R Plug AA P303 QPLGN0441CEZZ R Plug(14GT20) AB P502 QPLGN0560CEZZ R Plug AC P602 QPLGN0641CEZZ R Plug AB P701 QPLGN0260CEZZ R Plug AC P712 QPLGN0269GEZZ R Plug AB RMC1001 TP201 QLUGP0102PEZZ R Lug AA RDA300 PRDAR0142PEFW R Heat Sink, for IC301 AD RDA501 PRDAR0283PEFW R Heat Sink, for IC501 AF RDA700 PRDAR0260PEFW R Heat Sink, for IC701 AH RDA754 PRDAR0224PEFW R Heat Sink, for Q602 AF

RRMCU0235CEZZ R Remote Reciever AK

PWB-B DUNTK9990WET2/T3

CRT SOCKET UNIT

TRANSISTORS

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

DIODES

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

CAPACITORS

C871 VCKYPA1HB471K R 470p 50V Ceramic AA C872 VCKYPA1HB471K R 470p 50V Ceramic AA C873 VCKYPA1HB471K R 470p 50V Ceramic AA C880 VCKYPA1HB471K R 470p 50V Ceramic AA C881 VCKYPA1HB471K R 470p 50V Ceramic AA C882 VCKYPA1HB471K R 470p 50V Ceramic AA C875 VCKYPA2HB102K R 1000p 500V Ceramic AA C876 RC-KZ0150CEZZ R 1000p 3kV Ceramic AB C878 VCEAGA2EW106M R 10 250V Electrolytic AC

RESISTORS

R879 VRD-RA2BE471J R 470 1/8W Carbon AA R880 VRD-RA2BE471J R 470 1/8W Carbon AA

Page 52

14GT15 14GT20

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

Ref. No. Part No. Description CodeRef. No. Part No. Description Code

MISCELLANEOUS PARTS

QANTR0018PEZZ R Rod Antenna AQ

SP301 RSP-Z0005KJZZ Speaker

QCNW-2377PEZZ R Connecting Cord AE QCNW-2378PEZZ R Connecting Cord AE QCNW-2379PEZZ R Connecting Cord(14GT20) AE QCNW-2423PEN1 Connecting Cord

P851 QPLGN0641CEZZ R Plug AB

MISCELLANEOUS PARTS

P882 QPLGN0541CEZZ R Plug AB

å SC881 QSOCV0842CEZZ R CRT Socket AH

PWB-C DUNTK9989WET0(14GT20)

HEAD PHONE UNIT

RESISTORS

R354 VRS-CY1JF471J R 470 1/16W Metal Oxide AA R355 VRS-CY1JF471J R 470 1/16W Metal Oxide AA

MISCELLANEOUS PARTS

J351 QJAKJ0047CEZZ R Jack AD P351 QPLGN0441CEZZ R Plug AB

SUPPLIED ACCESSORIES

QPLGJ0113CEZZ R Plug AG RRMCG0025KJSA Infrared Remote Control Unit TiNS-0111KJZZ Operation Manual

ACCESSORIES (NOT REPLACEMENT ITEM)

UBATU0247AJZZ - Batteries —

ACCESSORIES

PACKING PARTS

NOT REPLACEMENT ITEM

SPAKC0104KJZZ - Packing Case(14GT15) — SPAKC0103KJZZ - Packing Case(14GT20) — SPAKP0677CEZZ - Wrapping Paper — SPAKX0069KJZZ - Buffer Material (Top) — SPAKX0070KJZZ - Buffer Material (Bottom) — SSAKA0230CEZZ - Polyethylene Bag —

Page 53

14GT15 14GT20

Ref. No. Part No. Description CodeRef. No. Part No. Description Code

MODEL 14GT15 CABINET PARTS

1 CCABA0081WEA0 Front Cabinet Ass'y 1-1 1-2 HBDGB0001KJSA R Badge, "SHARP" AE 1-3 JBTN-0043KJSA Button, Control 1-4 HDECQ0038KJSA LED/RC Cover 1-5 JBTN-0044KJSA Button, Power 1-6 MSPRC0021KJFW Spring, Power Button 1-7 HDECQ0040KJSA AV Cover 2 GCABB0055KJKA Rear Cabinet

Not Available

- Front Cabinet —

12 1-1

MODEL 14GT20 CABINET PARTS

1 CCABA0080WEA0 Front Cabinet Ass'y 1-1 1-2 HBDGB0001KJSA R Badge, "SHARP" AE 1-3 JBTN-0043KJSA Button, Control 1-4 HDECQ0038KJSA LED/RC Cover 1-5 JBTN-0044KJSA Button, Power 1-6 MSPRC0021KJFW Spring, Power Button 2 GCABB0055KJKA Rear Cabinet

Not Available

- Front Cabinet —

12 1-1

1-2

1-6 1-5 1-4 1-3

1-7

1-2

1-6 1-5 1-4 1-3

Page 54

14GT15 14GT20

Ref. No. Part No. Description CodeRef. 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.

TQ0866-S

Mar. 2000 Printed in Japan

NA. KY

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

Sharp 14GT15, 14GT20 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual