Sharp 20GT-15 User manual

1
20GT-15
WARNING
Thechassisinthisreceiverispartiallyhot.Useanisolationtransformerbetweenthelinecordplugandpower
receptacle,whenservicingthischassis.Topreventelectricshock,donotremovecover.Nouser– serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
COLOURTELEVISION
S30X520GT-15/
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
originalcondition and onlyparts identical tothose specified
be used.
MODEL
SERVICE MANUAL COLOUR TELEVISION MODEL 20GT-15
20GT-15
SHARP CORPORATION
20GT-15
Chassis No. UA-1
CONTENTS
Page
•FEATURES ...................................................................................................................................................... 2
•SPECIFICATIONS ........................................................................................................................................... 2
•IMPORTANT SERVICE NOTES ...................................................................................................................... 3
•ADJUSTMENT PRECAUTION......................................................................................................................... 3
•UA1 HOTEL MODE APPLICATION ................................................................................................................. 4
•SERVICE MODE.............................................................................................................................................. 4
•TROUBLE SHOOTING TABLE...................................................................................................................... 18
•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

20GT-15
2
SPECIFICATIONS
Convergence ...........................................................................Self Converging System Focus .............................................................................Quadra-Potential Electrostatic Sweep Deflection ............................................................................................Magnetic Intermediate Frequencies
Picture IF Carrier.......................................................................................38.9 MHz Sound IF Carrier Frequency
5.74 MHz .......................................................................................33.16 MHz 5.50 MHz .......................................................................................33.40 MHz
Colour Sub-Carrier Frequency ................................................................34.47 MHz
Power Input ............................................................................ 110 - 240V AC 50/60 Hz Power Consumption .............................................................................................. 75 W Audio Power Output Rating...................................................................3.0 W (at Max.) Speaker
Size .................................................................................................. 5 ×9 cm (1 pc)
Voice Coil Impedance ................................................................16 ohms at 400 Hz
Aerial Input Impedance
VHF/UHF ................................................................................. 75 ohm Unbalanced
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
Height: 476.0 mm
Depth: 479.0 mm
Weight (approx.): 17.2 kg
Cabinet Material ...........................................................................................All Plastics
FEATURES
ËFavourite Channel ËFull Auto Channel Preset and Auto Channel Skip Ë100-CH Program Memory ËCATV (Hyper Band) Ready 〈Used Frequency Synthesizer Tuner〉 ËAVL (Sound Keeper) Function ËBlack Stretch Circuit ËOn Timer/Sleep Timer/Reminder Timer ËBlue Back Noise Mute ËRear AV - In/Out Terminals ËColour-Comb Filter (NTSC Only) ËHigh Contrast Picture ËHotel Mode ËEnglish/Thai OSD
Specifications are subject to change without prior notice.

20GT-15
2
SPECIFICATIONS
Convergence ...........................................................................Self Converging System Focus .............................................................................Quadra-Potential Electrostatic Sweep Deflection ............................................................................................Magnetic Intermediate Frequencies
Picture IF Carrier.......................................................................................38.9 MHz Sound IF Carrier Frequency
5.74 MHz .......................................................................................33.16 MHz 5.50 MHz .......................................................................................33.40 MHz
Colour Sub-Carrier Frequency ................................................................34.47 MHz
Power Input ............................................................................ 110 - 240V AC 50/60 Hz Power Consumption .............................................................................................. 75 W Audio Power Output Rating...................................................................3.0 W (at Max.) Speaker
Size .................................................................................................. 5 ×9 cm (1 pc)
Voice Coil Impedance ................................................................16 ohms at 400 Hz
Aerial Input Impedance
VHF/UHF ................................................................................. 75 ohm Unbalanced
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
Height: 476.0 mm
Depth: 479.0 mm
Weight (approx.): 17.2 kg
Cabinet Material ...........................................................................................All Plastics
FEATURES
ËFavourite Channel ËFull Auto Channel Preset and Auto Channel Skip Ë100-CH Program Memory ËCATV (Hyper Band) Ready 〈Used Frequency Synthesizer Tuner〉 ËAVL (Sound Keeper) Function ËBlack Stretch Circuit ËOn Timer/Sleep Timer/Reminder Timer ËBlue Back Noise Mute ËRear AV - In/Out Terminals ËColour-Comb Filter (NTSC Only) ËHigh Contrast Picture ËHotel Mode ËEnglish/Thai OSD
Specifications are subject to change without prior notice.

3
20GT-15
IMPORTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by quali- fied 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.
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- tentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed:
1. When repairing the circuit, be sure not to increase the high voltage to
more than 28.7kV (at beam 0 µA) for the set.
2. To keep the set in a normal operation , be sure to make it function on
24.5kV ±1.5kV (at beam 1100 µA) in the case of the set.The set has
been factory - Adjusted to the above-mentioned 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 unauthorized types and/or brands
which may cause excess X-ray radiation.
BEFORE RETURNINGTHE 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, in-
sulating fishpapers, cabinet backs,adjustment and compartment cov- ers or shields,isolation resistor-capacity networks, mechanical insu- lators etc.
ADJUSTMENT PRECAUTION
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 theVOLUME 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 automati- cally preset, only when a new EEPROM is used (Judge with the first 4 bytes).
(2). The initial data are preset as listed in page 4, 5, & 6. (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 JA 122 & JA 124 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-
IX3368CEN0 Attachment)

3
20GT-15
IMPORTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by quali- fied 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.
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- tentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed:
1. When repairing the circuit, be sure not to increase the high voltage to
more than 28.7kV (at beam 0 µA) for the set.
2. To keep the set in a normal operation , be sure to make it function on
24.5kV ±1.5kV (at beam 1100 µA) in the case of the set.The set has
been factory - Adjusted to the above-mentioned 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 unauthorized types and/or brands
which may cause excess X-ray radiation.
BEFORE RETURNINGTHE 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, in-
sulating fishpapers, cabinet backs,adjustment and compartment cov- ers or shields,isolation resistor-capacity networks, mechanical insu- lators etc.
ADJUSTMENT PRECAUTION
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 theVOLUME 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 automati- cally preset, only when a new EEPROM is used (Judge with the first 4 bytes).
(2). The initial data are preset as listed in page 4, 5, & 6. (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 JA 122 & JA 124 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-
IX3368CEN0 Attachment)

20GT-15
4
UA1 HOTEL MODE APPLICATION
How to enable/disable the “Hotel Mode” ? Ans: a) Press the R/C (FUNCTION) key until language selection appear, within five sec-
ond 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 Set vol up/down by R/C key. PASSWORD * * * * Input 1, 3, 7, 9 by R/C key.
#1 Ch 1 is your selected channel
for hotel mode.
* 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)
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.
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.

5
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

20GT-15
6
EEPROM ITEMS OSD
DATA LENGTH INITIAL DATA
FIX/ADJ REMARK
VERTICAL SCAN DISABLE VSD
0(DISABLE)/1(ENABLE)
0 FIX
BLACK STRETCH BKS
0(DISABLE)/1(ENABLE)
1 FIX
AUTOMATIC VOLUME LEVELING AVL
0(DISABLE)/1(ENABLE)
1 FIX
FAST FILTER IF-PLL FFI
0(DISABLE)/1(ENABLE)
0 FIX
ENABLE VERTICAL GUARD (RGB BLANKING)
EVG
0(DISABLE)/1(ENABLE)
1 FIX ONLY BLK
EHT TRACKING MODE (HCO) EHT
0(DISABLE)/1(ENABLE)
1 FIX
OVERSCAN SWITCH OFF OSO
0(DISABLE)/1(ENABLE)
0 FIX
AUTO COLOUR LIMIT ACL
0(DISABLE)/1(ENABLE)
0 FIX
FORCED COLOUR LIMIT FCO
0(DISABLE)/1(ENABLE)
0 FIX
SOUND SYSTEM M S-M
0(DISABLE)/1(ENABLE)
0 FIX
SOUND SYSTEM DK S-DK
0(DISABLE)/1(ENABLE)
1 FIX *3
SOUND SYSTEM I S-I
0(DISABLE)/1(ENABLE)
1 FIX *3
SOUND SYSTEM BG S-BG
0(DISABLE)/1(ENABLE)
1 FIX
PLAYBACK SECAM P-SECAM
0(DISABLE)/1(ENABLE)
1 FIX *3
FE (RF) NTSC 3.58 F-N358
0(DISABLE)/1(ENABLE)
0 FIX
FE (RF) NTSC 4.43 F-N443
0(DISABLE)/1(ENABLE)
1 FIX *4
FE (RF) SECAM F-SECAM
0(DISABLE)/1(ENABLE)
1 FIX *5
VIDEO MUTE AT IDENT LOSS VMI
0(DISABLE)/1(ENABLE)
1 FIX
VIDEO MUTE AT PROGRAM/SOURCE CHANGE
VMC
0(DISABLE)/1(ENABLE)
1 FIX
HOTEL MODE HTL
0(DISABLE)/1(ENABLE)
0 FIX
REDUCED FM DEMODULATOR GAIN FOR BTSC SIGNAL
BTSC
0(DISABLE)/1(ENABLE)
0 FIX
NUMBER OF EXTERNAL AV SOURCE AV
0 FOR1 AV/1 FOR 2AV
1 ADJ *6
FM WINDOW SELECTION FMWS
0(DISABLE)/1(ENABLE)
0 FIX
SOUND MUTE BIT 0 SM0
0(DISABLE)/1(ENABLE)
1 FIX
SOUND MUTE BIT 1 SM1
0(DISABLE)/1(ENABLE)
0 FIX
THAI LANGUAGE THA
0(DISABLE)/1(ENABLE)
0 FIX *7
ARABIC LANGUAGE ARA
0(DISABLE)/1(ENABLE)
1 FIX *3
MALAY LANGUAGE MAL
0(DISABLE)/1(ENABLE)
1 FIX *3
CHINESE LANGUAGE CHI
0(DISABLE)/1(ENABLE)
1 FIX *3
FRENCH LANGUAGE FRE
0(DISABLE)/1(ENABLE)
1 FIX *3
RUSSIAN LANGUAGE RUS
0(DISABLE)/1(ENABLE)
1 FIX *3
FORCED V-SYNC SLICING LEVEL FSL
0(DISABLE)/1(ENABLE)
0 FIX
SYNC OF OSD HP2
0(DISABLE)/1(ENABLE)
0 FIX
TUNER CPT CPT
0(DISABLE)/1(ENABLE)
0 FIX
BILINGUAL BIL
0(DISABLE)/1(ENABLE)
0 ADJ *8
IF AGC SPEED BIT 0 AGC0
0(DISABLE)/1(ENABLE)
1 FIX
IF AGC SPEED BIT 1 AGC1
0(DISABLE)/1(ENABLE)
0 FIX
PHI-1 TIME CONSTANT (RF) FOA-FE
0(DISABLE)/1(ENABLE)
0 FIX
PHI-1 TIME CONSTANT (RF) FOB-FE
0(DISABLE)/1(ENABLE)
0 FIX
PHI-1 TIME CONSTANT (OFF AIR) FOA-AV
0(DISABLE)/1(ENABLE)
1 FIX
PHI-1 TIME CONSTANT (OFF AIR) FOB-AV
0(DISABLE)/1(ENABLE)
1 FIX
NOTE : FIXED DATA, PLEASE DO NOT CHANGE WITHOUT SPECIFIC INSTRUCTION.
*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’
IF 2 AV-OUT, SET ‘1’
*7: MANUAL CHANGE TO ‘1’ *8: IF BILINGUAL MODEL PLEASE CHANGE TO ‘1’
AFTERSHORTJA 122& JA124, ANDTURNONTHE MAIN POWERSWITCH,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 INITIAL DATA
FIX/ADJ REMARK
AGCTAKE 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 WHITETEMP DRI-RS 0~63 32 FIX WHITE POINT GREEN STD WHITE TEMP DRI-GS 0~63 32 ADJ WHITE POINT BLUE STD WHITETEMP DRI-BS 0~63 32 ADJ WHITE POINT RED WARM WHITE TEMP DRI-RW 0~63 32 FIX WHITE POINT GREEN WARMWHITE TEMP DRI-GW 0~63 32 FIX (DRI-GS)-7 DATA WHITE POINT BLUE WARMWHITE 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
0~99 OR>99FOR NONE
255 FIX
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

7
20GT-15
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 *1 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 STANDARD REMINDER TIMER In-active, ”—:—” ON TIMER In-active, ”—:—” OFF TIMER In-active, ”—:—” LAST POWER POWER-ON LANGUAGE *1 THAI BLUE BACK MUTE OFF HOTEL MODE OFF
*1: PLEASE CHANGE IT BY REMOTE CONTROL
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.
+ – +
–

20GT-15
8
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
AA=B
B
AA=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
R G B
CRT NECK
Lacquer
Purity Magnet 4-Pole Magnet
6-Pole Magnet.
20cm
40cm (14")
(21")
B G R
B G R
R G B
B G R
B G R
R G B
Wedge "a"
Wedge "b" Wedge "c"
About 100 Deg About
100 Deg
Lacquer

9
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.
3WHITE
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
4Max 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%

20GT-15
10
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.
2H, 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.
3OTHER
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)
2VIDEO 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.
2COLOUR 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.
3BRIGHTNESS
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.
4TINT 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.
5SHARPNESS
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.
6CH DISPLAY
COLOUR (1) All Ch (1~99) will have an OSD display of the
channel number in green colour under AFT ON condition.
7NORMAL 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
8WHITE 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.
9COLOUR
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.

11
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.

20GT-15
12
PROCESS
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
MODEL
LETTER NO.
MODEL
LETTER NO.
PASS WORD
PASS WORD
PASS WORD
PASS WORD
AGC TAKE-OVER
V-SLOPE
V-AMPLITUDE
V-CENTER
H-CENTER
H-SIZE
EW-PARALLELOGRAM
EW-PARABOLA/WIDTH
EW-UPPER CORNER
EW-LOWER CORNER
EW-TRAPEZIUM
HORIZONTAL-BOW
S-CORRECTION
0E
20
20
20
20
20
20
20
20
20
20
20
00
DRIVE-R (STANDARD)
DRIVE-G (STANDARD)
DRIVE-B (STANDARD)
DRIVE-R (WARM)
DRIVE-G (WARM)
DRIVE-B (WARM)
DRIVE-G (COOL)
DRIVE-B (COOL)
DRIVE-R (COOL)
20
20
20
20
20
20
20
20
19
SUB-VOLUME
SUB-CONTRAST
SUB-COLOUR
SUB-BRIGHTNESS
SUB-TINT
SUB-SHARPNESS
HTL-POSITION FF
HTL-VOLUME
3F
3F
20
20
20
20
20
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)
0F
08
08
00
0C
0F
0C
0C
0C
0C
0F
0C
0C
0C
08
08
04
04
08
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-FF
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-3F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
00-0F
55
MICON
DEFAULT 00-FF
4F 00-FF
43 00-FF
A1 00-FF
EEPROM
RANGE EEPROM
WRITE(CPU)
CHASSIS
CHECK DATA CHECK TYPE
CTV FINAL
CHECK DATA CHECK TYPE
LAST INITIAL
SETTING DATA
REMARKD7 D6 D5 D4 D3
DATA D2 D1 D0
SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
EEPROM CHECK DATA LIST 1
ISSUED DATE :
TV MICOM ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV DESIGN ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV PRODUCTION ENGINEERING
MANAGER
CHIEF
ENGINEER
MODEL :
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
SHARPNESS-OFFSET (SECAM)
SHARPNESS-OFFSET (N443)
SHARPNESS-OFFSET (N358)
EVG
BG
BTSC
CHN
FFI
I
HTL
MLY
AVL
DK
VMC
ARB
BKS
M
VMI
THA
AGC BIL OBA
CONTRAST
COLOUR
BRIGHTNESS
VOLUME
FCO
SCM SM
HP2
ACL
N443
FSL
OSO
N358
FMWS
RUS
EHT
PB-SEC
AV
FRA
01
3C
1E
1E
00-3C
00-3C
00-3C
00-3C
04 00-0F
0C 00-0F
08 00-0F
00-FF
00-FF
00-FF
00-FF
50
51
52
53
54
55
56
57
TINT
SHARPNESS
FAV-POS A
POSITION/AV1/AV2
FAV-POS B 0A 14 00-FF
01 00-FF
00-FF
1E 00-3C
1E 00-3C
MEMORY MAP

13
20GT-15
MEMORY MAP (Continued)
PROCESS
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
90
91
92
83
84
85
86
87
88
89
8A
8B
8C
8D
8E
8F
FAV-POS C
FAV-POS D
POWER
WHITE-TEMP
BLUE BACK
LANGUAGE
DIGIT
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
SKIP 1
SKIP 9
SKIP 17
SKIP 25
SKIP 33
SKIP 41
SKIP 49
SKIP 57
SKIP 65
SKIP 73
SKIP 81
SKIP 89
SKIP 97
SKIP 2
SKIP 10
SKIP 18
SKIP 26
SKIP 34
SKIP 42
SKIP 50
SKIP 58
SKIP 66
SKIP 74
SKIP 82
SKIP 90
SKIP 98
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
SKIP 5
SKIP 13
SKIP 21
SKIP 29
SKIP 37
SKIP 45
SKIP 53
SKIP 61
SKIP 69
SKIP 77
SKIP 85
SKIP 93
SKIP 6
SKIP 14
SKIP 22
SKIP 30
SKIP 38
SKIP 46
SKIP 54
SKIP 62
SKIP 70
SKIP 78
SKIP 86
SKIP 94
SKIP 7
SKIP 15
SKIP 23
SKIP 31
SKIP 39
SKIP 47
SKIP 55
SKIP 63
SKIP 71
SKIP 79
SKIP 87
SKIP 95
1E
28
00
00
00
00
00
00
00
00
00
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
00-FF
00-FF
00
00
00
00
00-02
00 00-01
00-01
00-07
00-01
80
00
00
00
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
0:OFF
1:ON
S-SYS
000:BG
001:I
010:DK
011:M
AFT
POS 0
POS 1
POS 2
POS 3
POS 4
POS 5
POS 6
POS 7
POS 8
POS 9
93
94
95
96
97
98
99
9A
9B
9C
9D
9E
9F
MODEL
LETTER NO.
MODEL
LETTER NO.
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 10
POS 11
POS 12
POS 13
POS 14
MICON
DEFAULT EEPROM RANGE EEPROM
WRITE(CPU)
CHASSIS
CHECK DATA CHECK TYPE
CTV FINAL
CHECK DATA CHECK TYPE
LAST INITIAL
SETTING DATA
REMARKD7 D6 D5 D4 D3
DATA D2 D1 D0
SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
EEPROM CHECK DATA LIST 2
ISSUED DATE :
TV MICOM ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV DESIGN ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV PRODUCTION ENGINEERING
MANAGER
CHIEF
ENGINEER
MODEL :
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
AA
AB
AC
AD
AE
AF
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
POS 15
POS 16
POS 17
POS 18
POS 19

20GT-15
14
MEMORY MAP (Continued)
PROCESS
ADDRESS
(HEX)
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
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
E0
E1
E2
D3
D4
D5
D6
D7
D8
D9
DA
DB
DC
DD
DE
DF
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
S-SYS POS 0
POS 20
POS 21
POS 22
POS 23
E3
E4
E5
E6
E7
E8
E9
EA
EB
EC
ED
EE
EF
MODEL
LETTER NO.
MODEL
LETTER NO.
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 24
POS 25
POS 26
POS 27
POS 28
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 29
POS 30
POS 31
POS 32
POS 33
POS 34
POS 35
POS 36
POS 37
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
POS 38
POS 39
POS 40
POS 41
MICON
DEFAULT EEPROM RANGE
WRITE(CPU)
CHASSIS
CHECK DATA CHECK TYPE
CTV FINAL
CHECK DATA CHECK TYPE
LAST INITIAL
SETTING DATA
REMARKD7 D6 D5 D4 D3
DATA D2 D1 D0
SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
EEPROM CHECK DATA LIST 3
ISSUED DATE :
TV MICOM ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV DESIGN ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV PRODUCTION ENGINEERING
MANAGER
CHIEF
ENGINEER
MODEL :
TUNING FREQUANCY (HIGHER PART)
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
FA
FB
FC
FD
FE
FF
100
101
102
103
104
105
106
107
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
POS 42
POS 43
POS 44
POS 45
POS 46
POS 47
POS 48
POS 49

15
20GT-15
MEMORY MAP (Continued)
PROCESS
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
130
131
132
123
124
125
126
127
128
129
12A
12B
12C
12D
12E
12F
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
S-SYS POS 0
POS 50
133
134
135
136
137
138
139
13A
13B
13C
13D
13E
13F
MODEL
LETTER NO.
MODEL
LETTER NO.
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 51
POS 52
POS 53
POS 54
POS 55
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 56
POS 57
POS 58
POS 59
POS 60
POS 61
POS 62
POS 63
POS 64
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 65
POS 66
POS 67
MICON
DEFAULT EEPROM RANGE
WRITE(CPU)
CHASSIS
CHECK DATA CHECK TYPE
CTV FINAL
CHECK DATA CHECK TYPE
LAST INITIAL
SETTING DATA
REMARKD7 D6 D5 D4 D3
DATA D2 D1 D0
SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
EEPROM CHECK DATA LIST 4
ISSUED DATE :
TV MICOM ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV DESIGN ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV PRODUCTION ENGINEERING
MANAGER
CHIEF
ENGINEER
MODEL :
TUNING FREQUANCY (HIGHER PART)
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
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 68
POS 69
POS 70
POS 71
POS 72
POS 73
POS 74
POS 75
POS 76
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 77
POS 78

20GT-15
16
MEMORY MAP (Continued)
PROCESS
ADDRESS
(HEX)
160
161
162
163
164
165
166
167
168
169
16A
16B
16C
16D
16E
16F
170
171
172
180
181
182
173
174
175
176
177
178
179
17A
17B
17C
17D
17E
17F
S-SYS POS 0
183
184
185
186
187
188
189
18A
18B
18C
18D
18E
MODEL
LETTER NO.
MODEL
LETTER NO.
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
POS 79
POS 80
POS 81
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
POS 82
POS 83
POS 84
POS 85
POS 86
POS 87
POS 88
POS 89
POS 90
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (HIGHER PART)
18F TUNING FREQUANCY (LOWER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
POS 91
POS 92
POS 93
POS 94
MICON
DEFAULT EEPROM RANGE
WRITE(CPU)
CHASSIS
CHECK DATA CHECK TYPE
CTV FINAL
CHECK DATA CHECK TYPE
LAST INITIAL
SETTING DATA
REMARKD7 D6 D5 D4 D3
DATA D2 D1 D0
SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
EEPROM CHECK DATA LIST 5
ISSUED DATE :
TV MICOM ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV DESIGN ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV PRODUCTION ENGINEERING
MANAGER
CHIEF
ENGINEER
MODEL :
TUNING FREQUANCY (HIGHER PART)
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
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
TUNING FREQUANCY (HIGHER PART)
TUNING FREQUANCY (LOWER PART)
(auto) C-SYSAFTS-SYS
(auto) C-SYSAFTS-SYS
(auto) C-SYS
(auto) C-SYS
POS 95
POS 96
POS 97
POS 98
POS 99
AV1
AV2

17
20GT-15
MEMORY MAP (Continued)
PROCESS
ADDRESS
(HEX)
1B8
1B9
1BA
1BB
1BC
1BD
1BE
1BF
1C0
1C1
1C2
1D0
1D1
1D2
1C3
1C4
1C5
1C6
1C7
1C8
1C9
1CA
1CB
1CC
1CD
1CE
1CF
S-SYS POS 0
1D3
1D4
1D5
1D6
1D7
1D8
1D9
1DA
1DB
1DC
1DD
1DE
1DF
MODEL
LETTER NO.
MODEL
LETTER NO.
MICON
DEFAULT EEPROM RANGE
WRITE(CPU)
CHASSIS
CHECK DATA CHECK TYPE
CTV FINAL
CHECK DATA CHECK TYPE
LAST INITIAL
SETTING DATA
REMARKD7 D6 D5 D4 D3
DATA D2 D1 D0
SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
EEPROM CHECK DATA LIST 6
ISSUED DATE :
TV MICOM ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV DESIGN ENGINEERING
MANAGER
CHIEF
ENGINEER
ISSUED DATE :
TV PRODUCTION ENGINEERING
MANAGER
CHIEF
ENGINEER
MODEL :
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

20GT-15
18
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
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
YES NO
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