Sharp 21GT-22 User manual

1
21GT-22
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.
SERVICE MANUAL
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.
MODEL 21GT-22
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. GA-1
Page
CONTENTS
»SPECIFICATIONS .............................................2
»IMPORTANT SERVICE NOTES ........................2
»ADJUSTMENT PRECAUTIONS........................3
»MEMORY MAP ................................................11
»GA1 HOTEL MODE APPLICATION ................15
»TROUBLE SHOOTING TABLE........................15
»SOLID STATE DEVICE BASE DIAGRAM .......18
»WAVEFORMS..................................................19
»CHASSIS LAYOUT..........................................20
»BLOCK DIAGRAM...........................................21
»DESCRIPTION OF SCHEMATIC DIAGRAM ..25
»SCHEMATIC DIAGRAM
ËMAIN UNIT ................................................... 26
ËCRT UNIT.....................................................28
Page
ËHEADPHONE UNIT .....................................28
ËMONO BILINGUAL UNIT.............................29
»PRINTED WIRING BOARD ASSEMBLIES .....30
»REPLACEMENT PARTS LIST
ËELECTRICAL PARTS
MAIN UNIT ...................................................36
CRT UNIT.....................................................39
HEADPHONE UNIT .....................................39
MONO BILINGUAL UNIT.............................39
ËSUPPLIED ACCESSORIES.........................40
ËPACKING PARTS.........................................40
ËCABINET PARTS .........................................41
»PACKING OF THE SET...................................42
FEATURES
ËPAL B/G
ËNTSC(AV Thru)
ËFull Auto Channel Preset and Auto Channel Skip
Ë100 CH Program Memory
ËCATV (Hyper Band) Ready
ËAVL (Sound Keeper) Function
ËHigh Contrast Picture (Black Stretch Circuit)
ËON Timer/Sleep Timer/Reminder Timer
ËFavourite Channel
ËBlue Back Noise Mute
ËFront AV In (Front AV Priority)
ËRear AV In/Out Terminals
ËColour-Comb Filter (NTSC AV In)
ËHotel Mode
ËFront Headphone Jack
ËEnglish/Thai Language OSD
ËMono Bilingual
SX2U121GT-22/

2-1 2-2
2
21GT-22
SPECIFICATIONS
Convergence .................................................................................Self Converging System Focus .........................................................................Electrostatic Focus High Bi-Potential Sweep Deflection................................................................................................... Magnetic Intermediate Frequencies
Picture IF Carrier ............................................................................................... 38.9 MHz Sound IF Carrier Frequency
5.74 MHz ...................................................................................................... 33.16 MHz 5.5 MHz .......................................................................................................... 33.4 MHz
Colour Sub-Carrier Frequency ....................................................................... 34.47 MHz
Power Input.................................................................................... AC110 - 240V, 50/60 Hz Power Consumption .....................................................................................................84 W Audio Power Output Rating......................................................................... 5.0 W (at Max.) Speaker
Size ..............................................................................................5 ×9 cm Elliptic (2 pcs) Voice Coil Impedance......................................................................... 16 ohms at 400 Hz
Aerial Input Impedance
VHF/UHF....................................................................................... 75 ohm Unbalanced
Receiving Channels (PAL-B/G)
»VHF..................................................................................................... E2 thru E12 »UHF .................................................................................................. E21 thru E69
Receiving Frequency
»VHF-Channels.................................................................... 48.25 thru 463.25 MHz »UHF-Channels ................................................................. 471.25 thru 863.25 MHz
Dimensions ..............................................................................................Width: 506.5 mm
Height: 476.0 mm
Depth: 477.5 mm
Weight (Approx.): 20.5 kg
Cabinet Material ................................................................................................. All Plastics
Specifications are subject to change without prior notice.
IMPORTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by
qualified service personnel only.
SERVICING 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 absolute minimum. Since certain malfunctions or servicing may produce potentially 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 28.0 kV (at beam 0

3
3-1 3-2
21GT-22
ADJUSTMENT PRECAUTIONS
This model’s setting are adjusted in two different ways: though the I2C bus control and in the conventional analog manner. The adjustments via the I2C bus control include preset-only items and variable data. CAUTION : Make sure TV Set is in "Normal Condition" before switch to Service Mode for
adjustment.
1. Setting the service mode by the microprocessor.
1Make a short-circuit 137 and 138 for a second and release to switch to the service mode
position and the microprocessor is in input mode. (Adjustment through the I2C bus con- trol). (Use JWS Key to set as well).
2Press the CH DOWN / UP key on the remote controller to get ready to select the mode
one by one.
3Press the CH DOWN / UP key on the remote controller to select the modes reversibly
one by one.
4Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified. 5Make a short-circuit 137 and 138 for a second and release to switch to the normal mode
(OFF) position and the microprocessor is in out of the service mode.
2. Factory Presetting.
1Make a short-circuit JA137 and JA138, then turn ON the main power and release to
switch to Service Mode. Initial values are automatically preset, only when a new EEPROM is used (Judge with the first 4 bytes).
2The initial data are preset as listed in pages 4-6. 3Make 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 make a short-circuit 137 and 138 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
(GA1 Series type RH-iX3368CE)
ËSERVICE MODE (1)In the Service Mode, Key is used to select the mode in the following order.
AGC &
GEOMETRIC
MODE
↓
AGCTAKE OVER POINT (AGC)
↓
VERTICAL SLOPE (V-LIN)
↓
VERTICAL AMP (V-AMP)
↓
VERTICAL SHIFT (V-CENT)
↓
HORIZONTAL SHIFT (H-CENT)
↓
EAST-WEST WIDTH (H-SIZE)
↓
HORIZONTAL PARALLELOGRAM (EW//)
↓
EAST-WEST PARABOLA/WIDTH (PARA)
↓
EAST-WEST UPPER COR.PB (COR(U))
↓
EAST-WEST LOWER COR. PB (COR(L))
↓
EAST WEST TRAPEZIUM (TRAPE)
↓
HORIZONTAL BOW (HB)
↓
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.T. (DRI-BS)
↓
W.P. RED COOL W.T.(DRI-RC)
↓
W.P. GREEN COOL W.T.(DRI-GC)
↓
W.P. BLUE COOL W.T.(DRI-BC)
↓
W.P. RED WARM W.T.(DRI-RW)
↓
W.P. GREEN WARM W.T.(DRI-GW)
↓
W.P. BLUE WARM W.T. (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 RGB 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
IC
OPTION
MODE
OFFSET
ADJ.
MODE

4-1 4-2
4
21GT-22
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)
↓
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)
*(Y-D :Y-DELAY)
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)
↓
SHARPNESS OFFSET (SECAM) (SHP-OS)
↓
SHARPNESS OFFSET (NTSC358) (SHP-O3)
↓
SHARPNESS OFFSET (NTSC443) (SHP-O4)
IC
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)
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)
↓
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)
↓
A
A
↓
NUMBER OF EXT 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 SELECTION (CPT)
↓
B
↓
BILINGUAL(BIL)
↓
IF AGC SPEED BIT 0 (AGC0)
↓
IF AGC SPEED BIT 1 (AGC1)
↓
FOATime Constant-RF (FOA-FE)
↓
FOB Time Constant-RF (FOB-FE)
↓
FOATime Constant-AV (FOA-AV)
↓
FOB Time Constant-AV (FOB-AV)
↓
LED BLINK SPEED (LED-F)
↓
VOLUME CONTROL TABLE (MSA)
↓
OUTPUT VERTICAL GUARD (NDF)
B
Direct Key-in for Service Item in Service 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 SUB TINT
SHARPNESS UP SUB-SHP
CHANNEL 1 DRI-GS CHANNEL 4 DRI-BS CHANNEL 7 CUT-R
CHANNEL FLASHBACK CUT-G

5
5-1 5-2
21GT-22
After short JA137 & 138, and turn on the main power switch, read data from E2PROM address 00H ~ 03H, and compare to the list below, if different, initialize the E2PROM.
Address : Data Address : Data
00H : 55H 02H : 43H 01H : 4FH 03H : A1H
EEPROM ITEMS OSD DATA LENGTH
INITIAL DATA FIX/ADJ
REMARK
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 EAST-WEST WIDTH H-SIZE 0~63 32 *FIX HORIZONTAL PARALLELOGRAM EW// 0~63 32 *FIX EAST-WEST PARABOLA/WIDTH PARA 0~63 32 *FIX EAST-WEST UPPER CORNER PARABOLA COR (U) 0~63 32 *FIX EAST-WEST LOWER CORNER PARABOLA COR (L) 0~63 32 *FIX EAST-WEST TRAPEZIUM TRAPE 0~63 32 *FIX HORIZONTAL BOW HB 0~63 32 *FIX S-CORRECTION S-COR 0~63 0 ADJ *3 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 COOL WHITE TEMP DRI-RC 0~63 25 *FIX WHITE POINT GREEN COOL WHITE TEMP DRI-GC 0~63 32 ADJ (DRI-GS)- 7 DATA WHITE POINT BLUE COOL WHITE TEMP DRI-BC 0~63 32 ADJ
SAME AS (DRI-BS) DATA
WHITE POINT RED WARM WHITE TEMP DRI-RW 0~63 32 *FIX WHITE POINT GREEN WARM WHITE TEMP DRI-GW 0~63 32 ADJ (DRI-GS)-7 DATA WHITE POINT BLUE WARM WHITE TEMP DRI-BW 0~63 32 ADJ (DRI-BS)-7 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 *4 SUB BRIGHTNESS SUB-BRI 0~63 32 ADJ SUB TINT SUB-TINT 0~63 32 ADJ SUB SHARPNESS SUB-SHP 0~63 32 (20) *FIX MAX HOTEL VOLUME HTL-VOL 0~63 32 *FIX HOTEL PROGRAM NUMBER HTL-PRG
0~99 OR>99FOR NONE
255 *FIX
OSD RGB REFERENCE RGB 0~15 15 *FIX BLACK LEVEL OFF-SET R CUT-R 0~63 32 ADJ BLACK LEVEL OFF-SET G CUT-G 0~63 32 ADJ CATHODE DRIVE LEVEL CDL 0~15 0 ADJ *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-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
NOTE : 1) *FIX: PLEASE DO NOT CHANGE FIXED DATA WITHOUT SPECIFIC INSTRUCTION.
Please set the EEPROM initial data according to the value in parenthesis ( ) before adjustment.
2) *2: CDLADJUST = 7 3) *3: S-COR ADJUST = 20
4) *4: After SUB-COLOURADJUSTMENT, ADD 6 STEPS INTO THE DATA OF SUB-COL.
NEW SUB-COL=SUB-COL DATAOF 75% WHITE & RED PORTIONS AT SAME LEVEL +6
STEPS.
EEPROM ITEMS OSD DATA LENGTH
INITIAL DATA FIX/ADJ
REMARK
SHARPNESS OFFSET (NTSC358) SHP-O3 0~15 12 *FIX SHARPNESS OFFSET (NTSC443) SHP-O4 0~15 8 *FIX 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
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 (0) *FIX
SOUND SYSTEM I S-I
0(DISABLE)/1(ENABLE)
1 (0) *FIX
SOUND SYSTEM BG S-BG
0(DISABLE)/1(ENABLE)
1*FIX
PLAYBACK SECAM P-SECAM
0(DISABLE)/1(ENABLE)
1 (0) *FIX
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 (0) *FIX
FE (RF) SECAM F-SECAM
0(DISABLE)/1(ENABLE)
1 (0) *FIX
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 EXTERNALAV SOURCE AV
0 FOR1 AV/1 FOR 2AV
1 (0) *FIX
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 (1) *FIX
ARABIC LANGUAGE ARA
0(DISABLE)/1(ENABLE)
1 (0) *FIX
MALAY LANGUAGE MAL
0(DISABLE)/1(ENABLE)
1 (0) *FIX
CHINESE LANGUAGE CHI
0(DISABLE)/1(ENABLE)
1 (0) *FIX
FRENCH LANGUAGE FRE
0(DISABLE)/1(ENABLE)
1 (0) *FIX
RUSSIAN LANGUAGE RUS
0(DISABLE)/1(ENABLE)
1 (0) *FIX
FORCED V-SYNC SLICING LEVEL FSL
0(DISABLE)/1(ENABLE)
0*FIX
SYNC OF OSD HP2
0(DISABLE)/1(ENABLE)
0*FIX
TUNER SELECTION (0:SHARP/ALPS;1:MURATA) CPT 0(DISABLE)/1(ENABLE) 0 (1)
*FIX
BILINGUAL BIL
0(DISABLE)/1(ENABLE) 0 (1)
*FIX
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
LED BLINK SPEED LED_F
0(DISABLE)/1(ENABLE)
0 (1) *FIX
VOLUME CONTROL PWM TABLE MSA
0(DISABLE)/1(ENABLE)
0 (1) *FIX
OUTPUT VERTICAL GUARD NDF
0(DISABLE)/1(ENABLE)
0 (1) *FIX

6-1 6-2
6
21GT-22
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 STANDARD
REMINDER TIMER In-active, "--:--"
ON TIMER In-active, "--:--"
OFF TIMER In-active, "--:--"
LAST POWER POWER-ON
LANGUAGE THAI
BLUE BACK MUTE ON
HOTEL MODE OFF
0 CHANNEL SKIP ON
LAST TV/AV TV
PIF ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1
Fig. 1
2 RF-AGC
TAKE OVER POINT ADJUSTMENT (I2C BUS
CONTROL)
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.
3. Call "AGC" mode in service mode. Adjust the
"AGC" bus data to obtain the Tuner output voltage level at TP201 is drop 1 step data from 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.
Note:
For the 50 ohm signal strength gauge, when not using 50/75 impedance adapter, signal strength is 52 ±1 dBµV(75 ohm
open), instead of 57 ±1 dBµV
(75 ohm open).
Precaution:
The loss of using impedance adapter
»Bias box: About 4.5 V
Oscilloscope
0.1V
TV Set
Bias box
TP201+
+
–
–
Tuner IFT (PRESET) 1. Get the tuner ready to receive the E-9 CH
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 IMPED-
ANCE 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.
E-9 CH
P C
10k 100k
1n60
75ohm
IF OUT
-1.5+/-0.8dB
1000p
Oscilloscope
Fig. 2
Fig. 3
ADJUSTMENT PRECAUTION:Make sure TV Set in "Normal Condition" before switch to
Service Mode for adjustment.

7
7-1 7-2
21GT-22
PURITY ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1PURITY ADJ. 1. Receive the GREEN-ONLY signal.Adjust the
beam current to ~ 700 µA.
2. Degauss the CRT enough with the degausing
coil.
3. Maintain the purity magnet at the zero mag-
netic field and keep the static convergence roughly adjusted.
4. Observe the points a, b, as shown in Fig. 1-1
through the microscope. Adjust the landings to A rank requirement.
5. Orient the raster rotation to 0 eastward. 6. Tighten up the deflection coil screws.
»Tightening torque: 108N ±20 N
(11kgf ±2 kgf)
7. 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 700 µA.
* For the following colours press R/C RGB key to
change.
* Press R/C RGB key for 1 sec-
ond in NORMAL MODE, the col- our will change to RGB mono colour mode.
ab
A
B
A
B
A = B A = B
Rank "A"
(on the right of the CRT)
Rank "A"
(on the left of the CRT)
Green-only Blue-only Red-only
Signal-colour
screen cleared
Fig. 1-1 Fig. 1-2
Fig. 1-3
CONVERGENCE ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 CONVERGENCE
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 deflectionyokelock 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. b
Fig. a Fig. c
Fig. d
RGB
BGR
R G B
R G B
B G R
B G R
RGB BGR
Lacquer
Wedge "a"
Wedge "b" Wedge
"c"
About 100°
About 100°
4-pole magnet
6-pole magnet
CRT neck
20mm
Lacquer
Purity magnet

8-1 8-2
8
21GT-22
1. Call " SUB-BRI" in service mode. (Receive Cross-
hatch pattern with 5 black level windows)
2. Adjust the " SUB BRIGHT " bus data in order that
the line 1and 2 have the same darkness wherelse line 3 is one step (data) brighter than line 2. Finally data minus 1 to make line 1, 2, and 3 are in same level (darkness).
Remark 1. Before CRT cutoff adjustment, SUB-BRIGHT, DRI-
RS/RW/RC, DRI-GS/GW/GC, DRI-BS/BW/BC, CUT-R and CUT-G must be INITIAL DATA.
2. CRT Cutoff adjustment must be done inside a dark
room.
1. Switch TV to VIDEO mode,BLUE BACK OFF, with
NO VIDEO signal.
2. Press R/C to set Picture Normal condition. 3. First, off the screen by adjust screen variable resistor. *4.Next,checkingAKB circuitfunction by slowlyincrease
screen variable resistor until colour raster suddenly on and off (AKB start function).
5. Then continue adjust until retrace line appear. 6. Finally, slowly decrease the screen variable resistor
until screen retrace line cut off (Not Raster)
Note :
Must confirm theAKB function in set before continue the next adjustment.
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 2 SUB-
BRIGHTNESS ADJUSTMENT (I2C BUS CONTROL)
Line 3 is one step (data) brighter than line 2
CRT CUTOFF ADJUSTMENT (I2C BUS
CONTROL)
3 WHITE
BALANCE SERVICE MODE ADJ. (I2C BUS CONTROL)
1. Receive the "WHITE" pattern with BURST signal. 2. Press R/C to set Picture NORMAL condition. 3. Connect the DC miliammeter between TP602 (-)
TP603 (+).
4. Check Beam current should be around 1100 µA. 5. Set it to service mode and adjust the DRI-GS, & DRI-
BS data to have a colour temperature of 12300°K ( white ). * 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 sig- nal.
7. Adjust "CUT-R" & "CUT-G" to get desired colour tem-
perature #. 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 warm-
ing up the unit for 30 minutes or longer with a beam current over 700µA.
* Adjust DRI-GC/GW, DRI-BC/BW as following DATA,
after finishing DRI-BS and DRI-GS DATAADJUST- MENT.
DRI-RW = 32 (FIXED), DRI-RS = 32 (FIXED) DRI-BC = "DRI-BS" (For 12300°K Condition)
# 12300°K X : 0.272
Y : 0.275
(MINOLTACOLOURANALYZER CA- 100) *Note:Above Data can be UP/DOWN
by Volume key.
LOW HIGH
21" 10cd/m2 120cd/m2
4 Max.
beam check 1. Receive the "Monoscope Pattern" signal.
2. Press R/C to set Picture NORMAL condition. 3. Connect the DC miliammeter between TP603 (+) &
TP602 (–). (Full Scale: 3 mA Range)
4.
Beam current must be within 1100 ±100 µA.
1 2 3 4 5
t
3.2Vdc 0
*Alternative Procedure (1) Step (1), (2), (3) and (4) are same
as beside procedure.
(2) Then continue adjust until retrace
line appear and make sure the col- our appear whether red, green or biue.
(3) Connect the oscilloscope to related
test points as below which is based on colour appear at (2) RED=TP47R, GREEN=TP47G,BLUE=TP47B
(4) Then adjust Screen VR until the tip
of signal reach 3.2Vdc.
1 2 3 4 5
1
2
* 12300°K DRI-GW="DRI-GS"-7
DRI-BW="DRI-BS"-7 DRI-GC="DRI-GS"-7 DRI-RC=25
HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 2 3 4 5 6
V-SLOPE (I2C BUS CON- TROL) V-SHIFT-50 (I2C BUS
CONTROL) V-AMP50 (I2C BUS CONTROL) H-SHIFT (50) (H-CENTER) S-CORREC- TION (I2C BUS
CONTROL) SUB- SHARPNESS
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%.
1. Call the "H-CENT" mode. 2. Increase or decrease"H-CENT"byVolume key
to center the picture horizontal.
1. SET DATA TO 20 * Check the E-5 CH Monoscope Pattern then re-
adjustV-Slope,V-Shift and V-Ampto makesure adjustment is in acceptable Ring-Shaped.
1. SET DATA TO 20
PAL CHROMA ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 SUB COLOUR
(I2C BUS
CONTROL)
1. Receive the "PAL Color Bar" signal. 2. Press R/C to set Picture Normal condition. 3. Connect the oscilloscope to
Red cathode(D882 Chathode) for 21" (Normal Neck).
»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. Add another 6 steps up into the value of SUB-
COL obtained in 4.
6. Clear the SERVICE Mode.
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 focus-
ing.
Fig. 1-1
Cy GB
WY 100%W
75% Mg R

9
9-1 9-2
21GT-22
NTSC CHROMA ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 SUB-TINT
(I2C BUS
CONTROL)
1. Receive the "NTSC3.58 Colour Bar" signal thru
AV in.
2. Connect the oscilloscope to TP47B (P882 pin
5) BLUE-OUT. »
Range : 100mV/div. (AC) (UseProbe10:1)
»
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. 1-1.
4. Clear the SERVICE mode.
PROTECTOR OPERATION CHECKING
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 BEAM
PROTECTOR 1. Receive "Monoscope Pattern" signal.
2. Set CONTRAST MAX. 3. Set BRIGHT MAX. 4. During the Collector & Emitter of Q883/5/7
short, make sure the protector ON and switch to standby mode.
* Select one of Q883/5/7 to do
each short test.
2 H.V
PROTECTOR 1. Receive "Monoscope Pattern" signal.
2. Connect output of Bias Box to D603 cathode
(R610 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.
A/V INPUT AND OUTPUT CHECKING
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1VIDEO AND
AUDIO OUT- PUT 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 im-
pedance. Make sure the output is as specified (1.0 Vp-p ±3 dB).
3. Terminate theAudio output with a 10k ohm im-
pedance. Make sure the O/P is as specified (1.76 Vp-p ±3 dB).
2 VIDEO AND
AUDIO INPUT CHECK
1. Using the TV/AV key on the remote controller,
make sure that the modes change in order of TV, AV & TV again and the video & audio out- put are according to the input terminal for each mode.If connect input to Front and Rear AV terminal, input terminal of Front AV will be se- lected.
3 Other
protectors 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)
Fig. 1-1
WYCy G Mg R B
SAME LEVEL
FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1
2 COLOUR key 1. Receive "Colour 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.
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.
3 BRIGHTNESS
key 1. Receive "Monoscope Pattern" signal.
2. Set P-Mode to select BRIGHTNESS. 3. Press Volume Up/Down key to check whether
the BRIGHTNESS effect is OK or not
4 TINT key 1. Receive the "NTSC Colour Bar" signal thruAV
in.
2. Set P-Mode to select TINT. 3. Press Volume Up/Down key to check TINT, UP
for GREEN direction and DOWN for PURPLE direction whether is OK or not.
5 SHARPNESS
Key 1. Receive "Monoscope Pattern" signal.
2. Set P-mode to select SHARPNESS. 3. Press Volume Up/Down key to check whether
the SHARPNESS effect is OK or not.
6 CH DISPLAY
COLOUR 1. All Ch (1~99) will have an OSD display of the
channel number in green colour underAFT ON condition.
7 NORMAL Key 1. Once in PICTURE Mode, and the NORMAL
key is pressed, all the settings will be present to normal setting. (Normal setting value for every mode). »CONTRAST : MAX »COLOUR : CENTER »BRIGHTNESS : CENTER »TINT : CENTER »SHARPNESS : CENTER
8 White Temp 1. Receive "Monoscope Pattern" signal.
2. Set FUNCTION to select WHITE TEMP. 3. Press Volume Up/Down key to check WHITE
TEMP Option, STANDARD: NORMAL SETTING, WARM for more REDDISH direction changing, COOL for more BLUISH direction changing.

10-1 10-2
10
21GT-22
FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
(Continued)
NO. Adjustment part Adjusting procedure and conditions Waveform and others
9 Colour
system 1. Receive the "PALCOLOURBAR"signal,press
the COLOUR SYSTEM key to select modes except PAL, check the COLOUR is not work- ing properly. Then, select the "PAL" mode. Checkagainitscoloursothatitisworkingprop- erly.
2. Receive "NTSC 4.43/3.58 COLOUR BAR" sig-
nal thru AV, press COLOUR SYSTEM key to select modes except N4.43/3.58, check the COLOUR is not working properly. Then, se- lect the "NTSC 4.43/3.58" mode. Check again its colour so that it is working properly.
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. TWO OSD LANGUAGE: ENGLISH THAILAND.
10 Sound system Receive"PAL-B/G"signal,checkthesound output
to make sure it is working properly.
HEADPHONE JACK CHECKING
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 HEADPHONE
OUTPUT CHECKING
1. Receive PAL COLOUR PAR with SOUND
400Hz, 100% MODULATION (±50kHz Dev).
2. Maximum volume, and check the headphone
output with 400Hz sound and no sound out from speaker.
NO.
Adjustment point
Adjusting procedure and conditions Waveform and others
1 BILINGUAL
FUNCTION CHECKING
1. Receive bilingual channel. 2. Press R/C "BILINGUAL" button and the sound
will change from sound 1 to sound 2.

11
11-1 11-2
21GT-22
MEMORY MAP
ADDRESS DATA
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 13 14 15 16 DRIVE-R (STANDARD) 20 00-3F 17 DRIVE-G (STANDARD) 20 00-3F 18 DRIVE-B (STANDARD) 20 00-3F 19 DRIVE-R (WARM) 20 00-3F
1A DRIVE-G (WARM) 20 00-3F
1B DRIVE-B (WARM) 20 00-3F 1C DRIVE-R (COOL) 19 00-3F
1D DRIVE-G (COOL) 20 00-3F
1E DRIVE-B (COOL) 20 00-3F 1F
20 21 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-FF
2A
2B 2C
2D OSD-REFERENCE 0F 00-0F
2E CUTOFF LEVEL -OFFSET R 20 00-3F
2F CUTOFF LEVEL -OFFSET G 20 00-3F
30 CATHODE DRIVE LEVEL 00 00-0F 31 Y-DELAY (TV PAL) 0C 00-0F 32 Y-DELAY (TV SECAM) 0F 00-0F
33 Y-DELAY (TV N358) 0C 00-0F
34 Y-DELAY (TV N443) 0C 00-0F 35 Y-DELAY (TV BW) 0C 00-0F 36 Y-DELAY (AV PAL) 0C 00-0F 37 Y-DELAY (AV SECAM) 0F 00-0F
38 Y-DELAY (AV N358) 0C 00-0F
39 Y-DELAY (AV N443) 0C 00-0F
3A Y-DELAY (AV BW) 0C 00-0F
3B COLOUR-OFFSET (PAL) 08 00-0F 3C COLOUR-OFFSET (SECAM) 08 00-0F
3D COLOUR-OFFSET (N358) 04 00-0F
3E COLOUR-OFFSET (N443) 04 00-0F 3F SHARPNESS-OFFSET (PAL) 08 00-0F
MODEL MODEL
LETTER NO. LETTER NO.
(1) 20th August 2001:Change of range & default.
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0 DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK
ADDRESS
DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0
40
SHARPNESS-OFFSET (SECAM)
04 00-0F
41
SHARPNESS-OFFSET (N358)
0C 00-0F
42
SHARPNESS-OFFSET (N443)
08 00-0F
43 44
FCO ACL OSO EHT EVG FFI AVL BKS
00-FF
45
SECAM N443 N358
PB-SECAM
BG I DK M
00-FF
46
SM1 SM0 FMWS AV BTSC HTL VMC VMI
00-FF
47
HP2 FSL RUS FRA CHN MLY ARB THA
00-FF
48
AGC1 AGC0 BIL CPTFOB-AV FOA-AV FOB-FE FOA-FE
NDF MSA LED-F
00-FF 00-F3
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
52 53 54 55
POSITION/AV1/AV2
01 00-FF
56
FAV-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
LAST POWER MODE
00 00-01
5D
WHITE-TEMP
00 00-02
5E
BLUE BACK
00 00-01
5F
LANGUAGE
00 00-07
60
LAST DIGIT MODE (1 OR 2)
00 00-01
61 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
6F
70 71 72 73 74
TUNING FREQUANCY (HIGHER PART)
S-SYS
POS 0
75
TUNING FREQUANCY (LOWER PART)
000:BG
76
S-SYS AFT (auto) C-SYS
001:I
77
TUNING FREQUANCY (HIGHER PART)
010:DK
POS 1
78
TUNING FREQUANCY (LOWER PART)
011:M
79
S-SYS AFT (auto) C-SYS
7A
TUNING FREQUANCY (HIGHER PART)
AFT
POS 2
7B
TUNING FREQUANCY (LOWER PART)
0:OFF
7C
S-SYS AFT (auto) C-SYS
1:ON
7D
TUNING FREQUANCY (HIGHER PART)
POS 3
7E
TUNING FREQUANCY (LOWER PART)
7F
S-SYS AFT (auto) C-SYS
MODEL MODEL
LETTER NO. LETTER NO.
1B
DE
53
3E
C4
00
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
DEFAULT RANGE
WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE
REMARK
(1) 20th August 2001: Added 3 new items.

12-1 12-2
12
21GT-22
ADDRESS DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0
80
TUNING FREQUANCY (HIGHER PART)
POS 4
81
TUNING FREQUANCY (LOWER PART)
82
S-SYS AFT (auto) C-SYS
83 TUNING FREQUANCY (HIGHER PART) POS 5 84 TUNING FREQUANCY (LOWER PART) 85
S-SYS AFT (auto) C-SYS
86
TUNING FREQUANCY (HIGHER PART)
POS 6
87
TUNING FREQUANCY (LOWER PART)
88
S-SYS AFT (auto) C-SYS
89
TUNING FREQUANCY (HIGHER PART)
POS 7
8A
TUNING FREQUANCY (LOWER PART)
8B
S-SYS AFT (auto) C-SYS
8C
TUNING FREQUANCY (HIGHER PART)
POS 8
8D
TUNING FREQUANCY (LOWER PART)
8E
S-SYS AFT (auto) C-SYS
8F
TUNING FREQUANCY (HIGHER PART)
POS 9
90
TUNING FREQUANCY (LOWER PART)
91
S-SYS AFT (auto) C-SYS
92
TUNING FREQUANCY (HIGHER PART)
POS 10
93
TUNING FREQUANCY (LOWER PART)
94
S-SYS AFT (auto) C-SYS
95
TUNING FREQUANCY (HIGHER PART)
POS 11
96
TUNING FREQUANCY (LOWER PART)
97
S-SYS AFT (auto) C-SYS
98
TUNING FREQUANCY (HIGHER PART)
POS 12
99
TUNING FREQUANCY (LOWER PART)
9A
S-SYS AFT (auto) C-SYS
9B
TUNING FREQUANCY (HIGHER PART)
POS 13
9C
TUNING FREQUANCY (LOWER PART)
9D
S-SYS AFT (auto) C-SYS
9E
TUNING FREQUANCY (HIGHER PART)
POS 14
9F
TUNING FREQUANCY (LOWER PART)
A0
S-SYS AFT (auto) C-SYS
A1
TUNING FREQUANCY (HIGHER PART)
POS 15
A2
TUNING FREQUANCY (LOWER PART)
A3
S-SYS AFT (auto) C-SYS
A4
TUNING FREQUANCY (HIGHER PART)
POS 16
A5
TUNING FREQUANCY (LOWER PART)
A6
S-SYS AFT (auto) C-SYS
A7
TUNING FREQUANCY (HIGHER PART)
POS 17
A8
TUNING FREQUANCY (LOWER PART)
A9
S-SYS AFT (auto) C-SYS
AA
TUNING FREQUANCY (HIGHER PART)
POS 18
AB
TUNING FREQUANCY (LOWER PART)
AC
S-SYS AFT (auto) C-SYS
AD
TUNING FREQUANCY (HIGHER PART)
POS 19
AE
TUNING FREQUANCY (LOWER PART)
AF
S-SYS AFT (auto) C-SYS
B0
TUNING FREQUANCY (HIGHER PART)
POS 20
B1
TUNING FREQUANCY (LOWER PART)
B2
S-SYS AFT (auto) C-SYS
B3
TUNING FREQUANCY (HIGHER PART)
POS 21
B4
TUNING FREQUANCY (LOWER PART)
B5
S-SYS AFT (auto) C-SYS
B6
TUNING FREQUANCY (HIGHER PART)
POS 22
B7
TUNING FREQUANCY (LOWER PART)
B8
S-SYS AFT (auto) C-SYS
B9
TUNING FREQUANCY (HIGHER PART)
POS 23
BA
TUNING FREQUANCY (LOWER PART)
BB
S-SYS AFT (auto) C-SYS
BC
TUNING FREQUANCY (HIGHER PART)
POS 24
BD
TUNING FREQUANCY (LOWER PART)
BE
S-SYS AFT (auto) C-SYS
BF
TUNING FREQUANCY (HIGHER PART)
POS 25
MODEL MODEL
LETTER NO. LETTER NO.
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK ADDRESS DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0
C0
TUNING FREQUANCY (LOWER PART)
POS 25
C1
S-SYS AFT (auto) C-SYS
C2
TUNING FREQUANCY (HIGHER PART)
POS 26
C3
TUNING FREQUANCY (LOWER PART)
C4
S-SYS AFT (auto) C-SYS
C5
TUNING FREQUANCY (HIGHER PART)
POS 27
C6
TUNING FREQUANCY (LOWER PART)
C7
S-SYS AFT (auto) C-SYS
C8
TUNING FREQUANCY (HIGHER PART)
POS 28
C9
TUNING FREQUANCY (LOWER PART)
CA
S-SYS AFT (auto) C-SYS
CB
TUNING FREQUANCY (HIGHER PART)
POS 29
CC
TUNING FREQUANCY (LOWER PART)
CD
S-SYS AFT (auto) C-SYS
CE
TUNING FREQUANCY (HIGHER PART)
POS 30
CF
TUNING FREQUANCY (LOWER PART)
D0
S-SYS AFT (auto) C-SYS
D1
TUNING FREQUANCY (HIGHER PART)
POS 31
D2
TUNING FREQUANCY (LOWER PART)
D3
S-SYS AFT (auto) C-SYS
D4
TUNING FREQUANCY (HIGHER PART)
POS 32
D5
TUNING FREQUANCY (LOWER PART)
D6
S-SYS AFT (auto) C-SYS
D7
TUNING FREQUANCY (HIGHER PART)
POS 33
D8
TUNING FREQUANCY (LOWER PART)
D9
S-SYS AFT (auto) C-SYS
DA
TUNING FREQUANCY (HIGHER PART)
POS 34
DB
TUNING FREQUANCY (LOWER PART)
DC
S-SYS AFT (auto) C-SYS
DD
TUNING FREQUANCY (HIGHER PART)
POS 35
DE
TUNING FREQUANCY (LOWER PART)
DF
S-SYS AFT (auto) C-SYS
E0
TUNING FREQUANCY (HIGHER PART)
POS 36
E1
TUNING FREQUANCY (LOWER PART)
E2
S-SYS AFT (auto) C-SYS
E3
TUNING FREQUANCY (HIGHER PART)
POS 37
E4
TUNING FREQUANCY (LOWER PART)
E5
S-SYS AFT (auto) C-SYS
E6
TUNING FREQUANCY (HIGHER PART)
POS 38
E7
TUNING FREQUANCY (LOWER PART)
E8
S-SYS AFT (auto) C-SYS
E9
TUNING FREQUANCY (HIGHER PART)
POS 39
EA
TUNING FREQUANCY (LOWER PART)
EB
S-SYS AFT (auto) C-SYS
EC
TUNING FREQUANCY (HIGHER PART)
POS 40
ED
TUNING FREQUANCY (LOWER PART)
EE
S-SYS AFT (auto) C-SYS
EF
TUNING FREQUANCY (HIGHER PART)
POS 41
F0
TUNING FREQUANCY (LOWER PART)
F1
S-SYS AFT (auto) C-SYS
F2
TUNING FREQUANCY (HIGHER PART)
POS 42
F3
TUNING FREQUANCY (LOWER PART)
F4
S-SYS AFT (auto) C-SYS
F5
TUNING FREQUANCY (HIGHER PART)
POS 43
F6
TUNING FREQUANCY (LOWER PART)
F7
S-SYS AFT (auto) C-SYS
F8
TUNING FREQUANCY (HIGHER PART)
POS 44
F9
TUNING FREQUANCY (LOWER PART)
FA
S-SYS AFT (auto) C-SYS
FB
TUNING FREQUANCY (HIGHER PART)
POS 45
FC
TUNING FREQUANCY (LOWER PART) TUNING FREQUANCY (HIGHER PART) TUNING FREQUANCY (LOWER PART)
FD
S-SYS AFT (auto) C-SYS
FE POS 46
FF MODEL MODEL
LETTER NO. LETTER NO.
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK

13
13-1 13-2
21GT-22
ADDRESS DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0
100 POS 46 101
TUNING FREQUANCY (HIGHER PART)
POS 47
102
TUNING FREQUANCY (LOWER PART)
103
S-SYS AFT (auto) C-SYS S-SYS AFT (auto) C-SYS
104
TUNING FREQUANCY (HIGHER PART)
POS 48
105
TUNING FREQUANCY (LOWER PART)
106
S-SYS AFT (auto) C-SYS
107
TUNING FREQUANCY (HIGHER PART)
POS 49
108
TUNING FREQUANCY (LOWER PART)
109
S-SYS AFT (auto) C-SYS
10A
TUNING FREQUANCY (HIGHER PART)
POS 50
10B
TUNING FREQUANCY (LOWER PART)
10C
S-SYS AFT (auto) C-SYS
10D
TUNING FREQUANCY (HIGHER PART)
POS 51
10E
TUNING FREQUANCY (LOWER PART)
10F
S-SYS AFT (auto) C-SYS
110
TUNING FREQUANCY (HIGHER PART)
POS 52
111
TUNING FREQUANCY (LOWER PART)
112
S-SYS AFT (auto) C-SYS
113
TUNING FREQUANCY (HIGHER PART)
POS 53
114
TUNING FREQUANCY (LOWER PART)
115
S-SYS AFT (auto) C-SYS
116
TUNING FREQUANCY (HIGHER PART)
POS 54
117
TUNING FREQUANCY (LOWER PART)
118
S-SYS AFT (auto) C-SYS
119
TUNING FREQUANCY (HIGHER PART)
POS 55
11A
TUNING FREQUANCY (LOWER PART)
11B
S-SYS AFT (auto) C-SYS
11C
TUNING FREQUANCY (HIGHER PART)
POS 56
11D
TUNING FREQUANCY (LOWER PART)
11E
S-SYS AFT (auto) C-SYS
11F
TUNING FREQUANCY (HIGHER PART)
POS 57
120
TUNING FREQUANCY (LOWER PART)
121
S-SYS AFT (auto) C-SYS
122
TUNING FREQUANCY (HIGHER PART)
POS 58
123
TUNING FREQUANCY (LOWER PART)
124
S-SYS AFT (auto) C-SYS
125
TUNING FREQUANCY (HIGHER PART)
POS 59
126
TUNING FREQUANCY (LOWER PART)
127
S-SYS AFT (auto) C-SYS
128
TUNING FREQUANCY (HIGHER PART)
POS 60
129
TUNING FREQUANCY (LOWER PART)
12A
S-SYS AFT (auto) C-SYS
12B
TUNING FREQUANCY (HIGHER PART)
POS 61
12C
TUNING FREQUANCY (LOWER PART)
12D
S-SYS AFT (auto) C-SYS
12E
TUNING FREQUANCY (HIGHER PART)
POS 62
12F
TUNING FREQUANCY (LOWER PART)
130
S-SYS AFT (auto) C-SYS
131
TUNING FREQUANCY (HIGHER PART)
POS 63
132
TUNING FREQUANCY (LOWER PART)
133
S-SYS AFT (auto) C-SYS
134
TUNING FREQUANCY (HIGHER PART)
POS 64
135
TUNING FREQUANCY (LOWER PART)
136
S-SYS AFT (auto) C-SYS
137
TUNING FREQUANCY (HIGHER PART)
POS 65
138
TUNING FREQUANCY (LOWER PART)
139
S-SYS AFT (auto) C-SYS
13A
TUNING FREQUANCY (HIGHER PART)
POS 66
13B
TUNING FREQUANCY (LOWER PART)
13C
S-SYS AFT (auto) C-SYS
13D
TUNING FREQUANCY (HIGHER PART)
POS 67
13E
TUNING FREQUANCY (LOWER PART)
13F
S-SYS AFT (auto) C-SYS
MODEL MODEL
LETTER NO. LETTER NO.
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK ADDRESS DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0
140
TUNING FREQUANCY (HIGHER PART)
POS 68
141
TUNING FREQUANCY (LOWER PART)
142
S-SYS AFT (auto) C-SYS
143
TUNING FREQUANCY (HIGHER PART)
POS 69
144
TUNING FREQUANCY (LOWER PART)
145
S-SYS AFT (auto) C-SYS
146
TUNING FREQUANCY (HIGHER PART)
POS 70
147
TUNING FREQUANCY (LOWER PART)
148
S-SYS AFT (auto) C-SYS
149
TUNING FREQUANCY (HIGHER PART)
POS 71
14A
TUNING FREQUANCY (LOWER PART)
14B
S-SYS AFT (auto) C-SYS
14C
TUNING FREQUANCY (HIGHER PART)
POS 72
14D
TUNING FREQUANCY (LOWER PART)
14E
S-SYS AFT (auto) C-SYS
14F
TUNING FREQUANCY (HIGHER PART)
POS 73
150
TUNING FREQUANCY (LOWER PART)
151
S-SYS AFT (auto) C-SYS
152
TUNING FREQUANCY (HIGHER PART)
POS 74
153
TUNING FREQUANCY (LOWER PART)
154
S-SYS AFT (auto) C-SYS
155
TUNING FREQUANCY (HIGHER PART)
POS 75
156
TUNING FREQUANCY (LOWER PART)
157
S-SYS AFT (auto) C-SYS
158
TUNING FREQUANCY (HIGHER PART)
POS 76
159
TUNING FREQUANCY (LOWER PART)
15A
S-SYS AFT (auto) C-SYS
15B
TUNING FREQUANCY (HIGHER PART)
POS 77
15C
TUNING FREQUANCY (LOWER PART)
15D
S-SYS AFT (auto) C-SYS
15E
TUNING FREQUANCY (HIGHER PART)
POS 78
15F
TUNING FREQUANCY (LOWER PART)
160
S-SYS AFT (auto) C-SYS
161
TUNING FREQUANCY (HIGHER PART)
POS 79
162
TUNING FREQUANCY (LOWER PART)
163
S-SYS AFT (auto) C-SYS
164
TUNING FREQUANCY (HIGHER PART)
POS 80
165
TUNING FREQUANCY (LOWER PART)
166
S-SYS AFT (auto) C-SYS
167
TUNING FREQUANCY (HIGHER PART)
POS 81
168
TUNING FREQUANCY (LOWER PART)
169
S-SYS AFT (auto) C-SYS
16A
TUNING FREQUANCY (HIGHER PART)
POS 82
16B
TUNING FREQUANCY (LOWER PART)
16C
S-SYS AFT (auto) C-SYS
16D
TUNING FREQUANCY (HIGHER PART)
POS 83
16E
TUNING FREQUANCY (LOWER PART)
16F
S-SYS AFT (auto) C-SYS
170
TUNING FREQUANCY (HIGHER PART)
POS 84
171
TUNING FREQUANCY (LOWER PART)
172
S-SYS AFT (auto) C-SYS
173
TUNING FREQUANCY (HIGHER PART)
POS 85
174
TUNING FREQUANCY (LOWER PART)
175
S-SYS AFT (auto) C-SYS
176
TUNING FREQUANCY (HIGHER PART)
POS 86
177
TUNING FREQUANCY (LOWER PART)
178
S-SYS AFT (auto) C-SYS
179
TUNING FREQUANCY (HIGHER PART)
POS 87
17A
TUNING FREQUANCY (LOWER PART)
17B
S-SYS AFT (auto) C-SYS
17C
TUNING FREQUANCY (HIGHER PART) TUNING FREQUANCY (HIGHER PART)
POS 88
17D
TUNING FREQUANCY (LOWER PART)
17E
S-SYS AFT (auto) C-SYS
17F POS 89
MODEL MODEL
LETTER NO. LETTER NO.
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK

14-1 14-2
14
21GT-22
ADDRESS
DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0
180
POS 89
181 182
TUNING FREQUANCY (HIGHER PART)
POS 90
183
TUNING FREQUANCY (LOWER PART)
184
S-SYS AFT (auto) C-SYS
185
TUNING FREQUANCY (HIGHER PART)
POS 91
186
TUNING FREQUANCY (LOWER PART)
187
S-SYS AFT (auto) C-SYS
188
TUNING FREQUANCY (HIGHER PART)
POS 92
189
TUNING FREQUANCY (LOWER PART)
18A
S-SYS AFT (auto) C-SYS
18B
TUNING FREQUANCY (HIGHER PART)
POS 93
18C
TUNING FREQUANCY (LOWER PART)
18D
S-SYS AFT (auto) C-SYS
18E
TUNING FREQUANCY (HIGHER PART)
POS 94
18F
TUNING FREQUANCY (LOWER PART)
190
S-SYS AFT (auto) C-SYS
191
TUNING FREQUANCY (HIGHER PART)
POS 95
192
TUNING FREQUANCY (LOWER PART)
193
S-SYS AFT (auto) C-SYS
194
TUNING FREQUANCY (HIGHER PART)
POS 96
195
TUNING FREQUANCY (LOWER PART)
196
S-SYS AFT (auto) C-SYS
197
TUNING FREQUANCY (HIGHER PART)
POS 97
198
TUNING FREQUANCY (LOWER PART)
199
S-SYS AFT (auto) C-SYS
19A
TUNING FREQUANCY (HIGHER PART)
POS 98
19B
TUNING FREQUANCY (LOWER PART)
19C
S-SYS AFT (auto) C-SYS
19D
TUNING FREQUANCY (HIGHER PART)
POS 99
19E
TUNING FREQUANCY (LOWER PART)
19F
S-SYS AFT (auto) C-SYS
1A0
AV1
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 1BA
1BB 1BC
1BD
1BE 1BF
MODEL MODEL
LETTER NO. LETTER NO.
TUNING FREQUANCY (LOWER PART)
S-SYS AFT (auto) C-SYS
MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
DEFAULT RANGE
WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE
REMARK
ADDRESS DATA MICON EEPROM EEPROM CHASSIS CTV FINAL
LAST INITIAL
SETTING DATA
(HEX) D7 D6 D5 D4 D3 D2 D1 D0 DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK
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
LETTER NO. LETTER NO.

15
15-1 15-2
21GT-22
GA1 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.
* 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.
#1 Ch 1 is your selected
channel for hotel mode.
Input 1, 3, 7 and 9 by R/C key.
Set vol up/down by R/C key.
HOTEL ON PASSWORD ****
TROUBLE SHOOTING TABLE
NO RASTER
Blown out.
Replace the fuse.
Check IC701, D701 and C705.
The fuse is again blown out.
Does horizontal circuit oscillate ?
Check Q752 and IC801.
D1001 (Power LED Red dimly) turns on or turns ON/OFF.
Check T701 pin (11) voltage (Approx. 310V at 220V AC)
Check F701.
Check Secondary Main+B (Approx. 130V)
Check CRT connector K1-K5 bias.
Check C878. Check
IC801.
Checking the protector circuit.
Check R619 and R618.
D1001 (Power LED Red brightly) turns on.
Check D751
Check R701, R707

16-1 16-2
16
21GT-22
TROUBLE SHOOTING TABLE
(Continued)
NO PICTURE, NO SOUND
Does noise signal appear at pin (44) of IC801 ?
NO SOUND
No snow noise.
Does noise or 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 noise or signal appear at pin (38) of IC801 ?
Check IC801 and its related circuit.
Check pin (1) of SF201, Tuner and related circuit. Check pin (37) of IC801 and related circuit.
Check Q253, Q254 and related circuit.
Check IC801.
Check C356 and peripheral circuit.
Check pin (27) of IC801, Tuner and related circuit.
Check pin(38) of IC801.
Does the noise level increase at max. Contrast, Brightness and Sound controls ?
CIRCUITS TO BE CHECKED: »Tuner. »PIF. »Automatic Gain Control. »(5V), (32V) Power Source. CIRCUITS TO BE CHECKED: »Sound system pins (28) and (44) of IC801. »Sound Detector Circuit. »Sound Switch and Att. Control. »Audio Output Circuit.
Does signal appear at pins (2) and (4) of IC301 ?
Check P302, IC301 and peripheral circuit. Check Q321, pins(4) and (6)
of IC801 and peripheral circuit.
Does signal appear at pins(28) of IC801?
TROUBLE SHOOTING TABLE
(Continued)
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED: »Sync. Separator Circuit.
NO VERTICAL SCAN
Vertical linearity and size abnormal.
Check pins(16), (17) and (34) of IC801.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Readjust vertical size. (Bus Data)
Check IC501.Check C505 and C509.
Check IC501 bias.
Check R501, R521, R503, R512, R533 and C533.

17
17-1 17-2
21GT-22
TROUBLE SHOOTING TABLE (Continued)
NO SPECIFIC COLOUR
Is some colour produced in B/W broadcast reception ?
Is the white balance properly adjusted ?
Readjust the white balance.
The picture colour is yellow.The picture colour is magenta.The picture colour is cyan.
Check Q870, Q885 and its adjacent circuits. Check Q871, Q883 and
its adjacent circuits. Check Q872, Q887 and its
adjacent circuits.
Check IC801 and bias control circuit.
NO SPECIFIC COLOUR
“PAL”
(NO COLOUR SYNCHRONIZATION)
Check IC801, R801, R802, R803, D804, D805, D806 and Q801.
Check X1001(12MHz).

18-1 18-2
18
21GT-22
TOP VIEW
SOLID STATE DEVICE BASE DIAGRAM
SIDE VIEW
AT24W04 D601A B709A
85
1
64 33
4
TX0110BM
TX0124BM 2SC3207
2PC1815
DX0111CE
BASE
COLLECTOR
EMITTER
BASE
COLLECTOR
EMITTER
16 9
18
28 15
114
BCE
KA7808A
123
CATHODE
ANODE (RED)
STRG5653
STV9302A
AN7523
PX0013PE
2SD2586
19
+ ~ ~ -
ZR :BR:
COLLECTOR COLLECTOR
BASE EMITTER BASE EMITTER
JC
COLLECTOR
BASE EMITTER
IX3368CE TDA9821 M52797SP 2SC2735
132

19
21GT-22
5) 84.8 Vp-p
6) 90.4 Vp-p
1) 1.04 Vp-p 3) 3.40 Vp-p 4) 3.12 Vp-p2) 3.32 Vp-p
8) 3.16 Vp-p 9) 2.44 Vp-p 10) 122 Vp-p7) 88.6 Vp-p
11) 8.72 Vp-p 13) 140 Vp-p 14) 1200kVp-p 15) 528 Vp-p12) 47.2 Vp-p
16) 27.2 Vp-p (V) 17) 2.00 Vp-p
WAVEFORMS

20
21GT-22
CHASSIS LAYOUT
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