Sharp 20U200 User manual

1
20U200, 20U250
51U200, 51U250
51U500, 51U550
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
S90i420U200//
In the interests of user-safety (Required by safety regulations in some countries) the set should be re-
stored to its original condition and only parts identical to those specified should be used.
MODELS
20U200, 20U250
51U200, 51U250
51U500, 51U550
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. UA-1
Page
CONTENTS
»SPECIFICATIONS................................................. 2
»IMPORTANT SERVICE NOTES ........................... 2
»ADJUSTMENT PRECAUTIONS ........................... 3
»UA1 HOTEL MODE APPLICATION .................... 18
»TROUBLE SHOOTING TABLE ........................... 19
»SOLID STATE DEVICE BASE DIAGRAM .......... 21
»CHASSIS LAYOUT.............................................. 22
»BLOCK DIAGRAM............................................... 24
»WAVEFORMS ..................................................... 30
»DESCRIPTION OF SCHEMATIC DIAGRAM...... 31
»SCHEMATIC DIAGRAM
ËMAIN UNIT (20U200/250) ............................... 32
ËMAIN UNIT (51U200/250) ............................... 34
ËMAIN UNIT (51U500/550) ............................... 36
Page
ËCRT UNIT ........................................................ 38
ËHEADPHONE UNIT......................................... 39
ËNICAM UNIT.................................................... 40
»PRINTED WIRING BOARD ASSEMBLIES......... 41
»REPLACEMENT PARTS LIST
ËELECTRICAL PARTS
MAIN UNIT ...................................................... 46
CRT UNIT ........................................................ 51
HEADPHONE UNIT......................................... 51
NICAM/IGR UNIT ............................................ 51
ËSUPPLIED ACCESSORIES ............................ 53
ËPACKING PARTS ............................................ 53
ËCABINET PARTS............................................. 53
FEATURE
ËFavorite Channel
ËFull Auto Search System
Ë100 CH Program Memory
ËCATV (Hyper Band) Ready
ËAVL (Sound Keeper) Function
ËHigh Contrast Picture (Black Stretch Circuit)
ËON Timer/Sleep Timer/Reminder Timer
ËBlue Back Noise Mute
ËFront AV In and Rear AV In/Out Terminals
ËRear Sub-Woofer Terminal
ËFront Headphone Jack
ËColour-Comb Filter (NTSC AV In)
ËHotel Mode
ËEnglish Language OSD
ËLow Power Consumption
ËAV Stereo (20U200/250, 51U200/250)
ËNICAM/IGR Stereo Sound Output (51U500/550)
20U200 51U200/500
20U250 51U250/550

2
20U200, 20U250
51U200, 51U250
51U500, 51U550
2-1 2-2
SPECIFICATIONS
Convergence ..............................................................................Self Convergence System
Focus .........................................................................Electrostatic Focus High Bi-Potential
Sweep Deflection................................................................................................... Magnetic
Intermediate Frequencies
Picture IF Carrier ............................................................................................... 38.9 MHz
Sound IF Carrier Frequency
5.5 MHz .......................................................................................................... 33.4 MHz
Colour Sub-Carrier Frequency ........................................................................ 34.47 MHz
Power Input ...................................................................................110 - 240V AC 50/60 Hz
Power Consumption
20U200/250.............................................................................................................94W
51U200/250.............................................................................................................98W
51U500/550...........................................................................................................103W
Audio Power Output Rating........................................................... 7.5 W + 7.5 W (at Max.)
Speaker
Size .................................................................................................10 cm Round (2 pcs.)
Voice Coil Impedance ......................................................................... 16 ohms at 400 Hz
Aerial Input Impedance
VHF/UHF ....................................................................................... 75 ohm Unbalanced
Tuner Ranges
»VHF-Channels............................................. 1 (44.25 MHz) thru 11 (224.25 MHz)
»UHF-Channels ........................................ 21 (471.25 MHz) thru 69 (855.25 MHz)
Dimensions
Dimensions ..............................................................................................Width: 692.0 mm
Height: 477.5 mm
Depth: 474.5 mm
Weight (approx.): 20U200/250 24.0 kg
51U200/250 24.5 kg
51U500/550 24.7 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.
SERVICE OF HIGHVOLTAGE 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. 20U200/250 : When repairing the circuit, be sure not to increase the high
voltage to more than 27.7 kV (at beam 0 mA) for the set.
51U200/250/500/550 : When repairing the circuit, be sure not to increase the high
voltage to more than 28.1 kV (at beam 0 mA) for the set.
2. 20U200/250 : To keep the set in a normal operation, be sure to make it
function on 24.5 kV ± 1.5 kV (at beam 1,100 µA) in the case
of the set.
51U200/250/500/550 : To keep the set in a normal operation, be sure to make it
function on 24.8 kV ± 1.5 kV (at beam 1,100 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 RETURNING THE RECEIVER
Before returning the receiver to the user, perform the following safety checks.
1. Inspect all lead dress to make certain that leads are not pinched or that
hardware is not lodged between the chassis and other metal parts in the
receiver.
2. Inspect all protective devices such as non-metallic control knobs, insulating
fishpapers,cabinet backs,adjustment andcompartment coversor shields,isolation
resistor-capacity networks, mechanical insulators and etc.

3
20U200, 20U250
51U200, 51U250
51U500, 51U550
3-1 3-2
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.
1. Setting the service mode by the microprocessor.
1Make a short-circuit JA122 and JA124 for a 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).
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 ashort circuit JA122 and JA124 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 JA122 and JA124 for a second and release to switch to the service
mode position and turn on the main power switch.Initial values are automatically preset,
only when a new EEPROM is used (Judge with the first 4 bytes).
2The initial data are preset as listed in pages 5-7.
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 short-circuit JA122 and JA124 to switch to the service
mode position first and then turn on the main power switch. (See 2-1 above).
Precaution: If haven’t done this initiation,it may possibly generate excessive Beam
current.
3. For reference please check with memory map
(UA1 Series type RH-IX3410CE Attachment)
AGC &
GEOMETRIC
MODE
↓
AGCTAKE OVER POINT (AGC)
↓
VERTICAL SLOPE (V-LIN)
↓
VERTICAL AMP (V-AMP)
↓
VERTICAL SHIFT (V-CENT)
↓
HORIZONTAL SHIFT (H-CENT)
↓
HORIZONTAL PARALLELOGRAM (EW//)
↓
EAST-WEST PARABPLA/WIDT (PARA)
↓
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.P. (DRI-BS)
↓
W.P. RED COOL W.P.(DRI-RC)
↓
W.P. GREEN COOL W.P.(DRI-GC)
↓
W.P. BLUE COOL W.P. (DRI-BC)
↓
W.P. RED WARM W.P.(DRI-RW)
↓
W.P. GREEN WARM W.P.(DRI-GW)
↓
W.P. BLUE WARM W.P.(DRI-BW)
SUB
ADJ.
MODE
↓
MAX VOLUME (SUB-VOL)
↓
SUB CONTRAST (SUB-CON)
↓
SUB COLOUR (SUB-COL)
↓
SUB BRIGHTNESS (SUB-BRI)
↓
SUB TINT (SUB-TINT)
↓
SUB SHARPNESS (SUB-SHP)
↓
MAX HOTELVOLUME (HTL-VOL)
↓
HOTEL PROGRAM NO(HTL-PRG)
↓
BLUE BACK CONTRAST (BB-CON)
↓
OSD GRB REFERENCE (RGB)
↓
BLACK LEVEL OFFSET R(CUT-R)
↓
BLACK LEVEL OFFSET G(CUT-G)
↓
CATHODE DRIVE LEVEL(CDL)
FORWARD : CH DOWN KEY
REVERSE : CH UP KEY
* ( ) means OSD display.
FORWARD : CH DOWN KEY
REVERSE : CH UP KEY
AGC &
GEOMETRIC
MODE
WHITE POINT
ADJ.
MODE
SUB
ADJ.
MODE
Y-DELAY
ADJ.
MODE
IC
OPTION
MODE
OFFSET
ADJ.
MODE
MISC.
OPTION
MODE
STEREO
ADJ.
MODE
ËSERVICE MODE
(1)In the Service Mode, Key is used to select the mode in the following order.

4
20U200, 20U250
51U200, 51U250
51U500, 51U550
4-1 4-2
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)
SOUND PROCESSOR
AND
STEREO ADJ. MODE
↓
BASS MIX FOR ANXXXX (BM_ON)
↓
BASS MIX AFFECT FOR ANXXXX (BM_EFF)
↓
AGC FOR ANXXXX (AGC_ON)
↓
AGC ADJUST FOR ANXXXX (AGC_ADJ)
↓
NICAM AGC (AGC_N)
↓
NICAM AGC GAIN ADJ (GAIN_N)
↓
FM OUTPUT LEVEL (FM_LV)
↓
IGR OUTPUT LEVEL (IGR_LV)
↓
NICAM OUTPUT LEVEL B/G (BG_NLV)
↓
NICAM OUTPUT LEVEL I (I_NLV)
↓
NICAM OUTPUT LEVEL D/K (DK_NLV)
↓
NICAM LOWER ERR LIMIT (LOW-ERR)
↓
NICAM UPPER ERR LIMIT (UP_ERR)
↓
IGR STR R CH GAIN ADJ (IGR_STR)
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)
↓
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)
↓
A
A
↓
FRENCH LANGUAGE (FRE)
↓
RUSSIAN LANGUAGE (RUS)
↓
FORCED V-SYNC SLICING LEVEL(FSL)
↓
SYNC OF OSD (HP2)
↓
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)
↓
TELETEXT (TXT)
↓
TEXT WEST OR EURO CHAR (TXT_W/E)
↓
TEXT PAN-EURO LANG (TXT-EUR)
↓
IF FREQ SELECTION (IF_38_0)
↓
CHARGE PUMP (CP)
↓
AN5890 ON (AN5890)
↓
AN5891 ON (AN5891)
↓
AN7396 ON (AN7396)
↓
NICAM DECODING (NICAM)
↓
IGR DECODING (IGR)
↓
GAME MODE (GAME)
↓
BILINGUAL (BIL)

5
20U200, 20U250
51U200, 51U250
51U500, 51U550
5-1 5-2
USER DATA IN SERVICE MODE
* While SERVICE mode ON, EEPROM DATA will switch to the service data.
Also, once SERVICE mode OFF, EEPROM will switch back to previous USER DATA.
* In the service mode, the user data establish as below,
MODE USER DATA
CONTRAST MAX
COLOUR CENTER
BRIGHTNESS CENTER
TINT CENTER
SHARPNESS CENTER
WHITE TEMP STANDARD
S-VOLUME MAX
BLUE BACK OFF
C SYSTEM AUTO
S SYSTEM B/G
The flow of Mode lists as following,
* Direct Key-in Step1 Mode
RC COMMAND SERVICE-ITEM
STANDBY/ON STANDBY
TV/VIDEO NEXT SOURCE
DIGIT 0…9 DIGIT 0….9
AV1 SELECT AV1
AV2 SELECT AV2
-/-- 1/2 DIGIT ENTRY
FUNCTION FSET AGC
TIMER TSET SUB-VOL
TXT/MIX DRI-GS
PIC DRI-BS
HOLD DRI-GC
CANCEL DRI-GW
SIZE DRI-RC
REVEAL DRI-BW
RED CUT-R
GREEN CUT-G
BLUE BACK S-COR
S-SYSTEM HB
CONTRAST + SUB-CON
CONTRAST - V-LIN
COLOUR + SUB-COL
COLOUR - V-AMP
BRIGHTNESS + SUB-BRI
BRIGHTNESS - V-CENT
TINT + SUB-TINT
TINT - H-CENT
SHARPNESS + SUB-SHP
SHARPNESS - EW//
BASS + FM_LV
BASS - IGR_LV
TREBLE + IGR_STR
TREBLE - B/G_NLV
After short JA122 & JA124, and turn on the main power switch, read data from EEPROM
address 00H ~ 03H, and compare to the list below, if different, initialize the EEPROM.
Address : Data Address : Data
00H : 55H 02H : 53H
01H : 41H 03H : 36H
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
HORIZONTAL SIZE H-SIZE 0~63 32 FIX NO EFFECT
HORIZONTAL PARALLELOGRAM EW// 0~63 32 FIX NO EFFECT
EAST-WEST PARABOLA/WIDTH PARA 0~63 32 FIX NO EFFECT
CORRECTION UPPER COR (U) 0~63 32 FIX NO EFFECT
CORRECTION LOWER COR (L) 0~63 32 FIX NO EFFECT
TRAPEZIUM TRAPE 0~63 32 FIX NO EFFECT
HORIZONTAL BOW HB 0~63 32 FIX NO EFFECT
S-CORRECTION S-COR 0~63 0 FIX
WHITE POINT RED STD WHITE TEMP DRI-RS 0~63 32 FIX
WHITE POINT GREEN STD WHITE TEMP DRI-GS 0~63 32 ADJ
WHITE POINT BLUE STD WHITE TEMP DRI-BS 0~63 32 ADJ
WHITE POINT RED COOL WHITE TEMP DRI-RC 0~63 25 FIX
WHITE POINT GREEN COOL WHITE TEMP DRI-GC 0~63 32 FIX (DRI-GS)-7 DATA
WHITE POINT BLUE COOL WHITE TEMP DRI-BC 0~63 32 FIX (DRI-BS) SAME DATA
WHITE POINT RED WARMWHITE TEMP DRI-RW 0~63 32 FIX
WHITE POINT GREEN WARM WHITE TEMP DRI-GW 0~63 32 FIX (DRI-GS)-7 DATA
WHITE POINT BLUE WARM WHITETEMP DRI-BW 0~63 32 FIX (DRI-BS)-7 DATA
MAX VOLUME SUB-VOL 0~60 60 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 0~60 30 FIX *1
HOTEL PROGRAM NUMBER HTL-PRG 0~99 OR>99FOR NONE 255 FIX
BLUE BACK CONTRAST BB-CON 0~15 10 FIX
OSD RGB REFERENCE RGB 0~15 15 FIX
BLACK LEVEL OFF-SET R CUT-R 0~15 8 ADJ
BLACK LEVEL OFF-SET G CUT-G 0~15 8 ADJ
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

6
20U200, 20U250
51U200, 51U250
51U500, 51U550
6-1 6-2
NOTE ( * ) :
Fix data, please do not change without specific instruction.”
*1 : Unless customer request, or else please fix the adjustment
*2 : CDL data= ‘2 ‘.
*3 : Manual change to ‘0 ‘
*4 : Switch off AN5890 ( Manual change to ‘0 ‘)
*5 : Switch on AN5891 ( Manual change to ‘1 ‘)
*6 : Change FM-LV data from 15 to 21
Change IGR-LV data from 16 to 23
Change B/G-NLV data from 13 to 20
Change LOW ERR data from 35 to 20
*7 : Change to ‘1’for NICAM and IGR model
EEPROM ITEMS OSD DATA LENGTH INITIAL DATA FIX/ADJ REMARK
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
BASS MIX FOR ANXXXX BM-ON 0(DISABLE)/1(ENABLE) 0 FIX
BASS MIX EFFECT FOR ANXXXX BM-EFF 0~3 2 FIX
AGC FOR ANXXXX AGC-ON 0(DISABLE)/1(ENABLE) 1 FIX
AGC ADJUST FOR ANXXXX AGC-ADJ 0~3 3 FIX
NICAM AGC AGC-N 0(ENABLE)/1(DISABLE) 0 FIX
NICAM AGC GAIN ADJ GAIN-N 0~31 0 FIX
FM OUTPUT LEVEL FM-LV 0~30 15 FIX *6
IGR OUTPUT LEVEL IGR-LV 0~30 16 FIX *6
NICAM OUTPUT LEVEL (B/G) BG-NLV 0~30 13 FIX *6
NICAM OUTPUT LEVEL (I) I-NLV 0~30 18 FIX
NICAM OUTPUT LEVEL (D/K) DK-NLV 0~30 13 FIX
NICAM LOWER ERROR LIMIT LOW-ERR 0~255 35 FIX *6
NICAM UPPER ERROR LIMIT UP-ERR 0~255 70 FIX
IGR STEREO R CH GAIN ADJUST IGR-STR 0~13 6 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 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 *3
FE (RF) SECAM F-SECAM 0(DISABLE)/1(ENABLE) 1 FIX *3
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 BTSC
0(DISABLE)/1(ENABLE) 0 FIX
FOR BTSC SIGNAL
NUMBER OF EXTERNAL AV SOURCE AV 0 FOR1 AV/1 FOR 2AV 1 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
EEPROM ITEMS OSD DATA LENGTH INITIAL DATA FIX/ADJ REMARK
THAI LANGUAGE THA 0(DISABLE)/1(ENABLE) 0 FIX
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
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
TELETEXT TXT 0(DISABLE)/1(ENABLE) 0 FIX
TELETEXT WESTERN OR EASTERN CHAR TXT-WE 0(WESTERN)/1(EASTERN) 0 FIX
TELETEXT PAN-EURO LANG TXT-EUR 0(EURO)/1(OTHER) 0 FIX
IF FREQ SELECTION IF-38.0 0(38.9)/1(38.0) 0 FIX
CHARGE PUMP CP 0(FAST TUNE)/ 0 FIX
1(MODERATE TUNE)
AN5890 PRESENT AN5890 0(DISABLE)/1(ENABLE) 1 FIX *4
AN5891 PRESENT AN5891 0(DISABLE)/1(ENABLE) 0 FIX *5
AN7396 PRESENT AN7396 0(DISABLE)/1(ENABLE) 0 FIX
NICAM DECODING ENABLED NICAM 0(DISABLE)/1(ENABLE) 0 FIX *7
IGR DECODING ENABLED IGR 0(DISABLE)/1(ENABLE) 0 FIX *7
GAME MODE ENABLED GAME 0(DISABLE)/1(ENABLE) 0 FIX
BILINGUAL BIL
0(DISABLE)/1(ENABLE) 0 FIX

7
20U200, 20U250
51U200, 51U250
51U500, 51U550
7-1 7-2
SHIPPING SETTING & CHECKING
(1)The following default data has been factory-set for the E2PROM.
(By press factory setting 3 key)
ITEMS DATA SETTING
LAST PROGRAM/CHANNEL 1
FLASHBACK PROGARM/CH 1
DIGIT 2
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 ENGLISH
BLUE BACK MUTE ON
HOTEL MODE OFF
0 CHANNEL SKIP ON
LAST TV/AV TV
BASS/TRE/BAL CENT
SURROUND OFF
SURROUND LEVEL CENT
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
AGCTerminal) as shown in Fig. 3.
3. Call "AG" mode in service mode. Adjust the
"AG" bus data to obtain the Tuner output pin
drop 0.1 V below maximum voltage.
4. Change the antenna input signal to
63~67dBµV, and make sure there is no noise.
5. Turn up the input signal to 90~95 dBµV to be
sure that there is no cross modulation beat.
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).
For the 50 ohm signal strength
gauge,
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 80dBµV.
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 - 6V 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
Note: After pressing MODEL setting. 0 channel will be skipped.

8
20U200, 20U250
51U200, 51U250
51U500, 51U550
8-1 8-2
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 about 700 mA.
2. Degauss the CRT. Maintain the purity magnet
at the zero magnetic field and keep the static
convergence roughly adjusted.
3. Observe the points a, b as shown in Fig. 4-1
through the microscope.Adjust the landing to
the rank A requirements.
4. Orient the raster rotation to 0 eastward.
5. Tighten up the deflection coil screws.
»Tightening torque: 108 ± 20 N (11 ±2 kgf)
6. Make sure the CRT corners landing meet the
A rank requirements.If not, stick the magnet
sheet to correct it.
Note: This adjustment must be done after
warming up the unit for 30 minutes
or longer with a beam current over
700 µA.
* For the following colours press R/C RGB key
to change.
* Press R/C RGB key for a sec-
ond in NORMAL MODE, the
colour 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)
Red-only Green-only Blue-only
Signal-colour
screen cleared
Fig. 4-1
Fig. 4-2
Fig. 4-3
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
CONVERGENCE ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 CONVERGENC
ADJ.
(To be done
after the purity
adjustment.)
1. Receive the "Crosshatch Pattern" signal.
2. Using the remote controller, call NORMAL
mode.
Static Convergence
1. Turn the 4-pole magnet to a proper opening
angle in order to superpose the blue and red
colours.
2. Turn the 6-pole magnet to a proper opening
angle in order to superpose the green colour
over the blue and red colours.
Dynamic Convergence
1. Adjust the convergence on the fringes of the
screen in the following steps.
a) Fig.5-1: Drive the wedge at point "a" and
swing the deflection coil upward.
b) Fig. 5-2: Drive the wedge at points "b"
and "c", and swing the deflection coil
downward.
c) Fig.5-3: Drive the "c" wedge deeper and
swing the deflection coil rightward.
d) Fig. 5-4: Drive the "b" wedge deeper and
swing the deflection coil leftward.
2. Fix all the wedges on the CRT and apply glass
tape over them.
3. Apply lacquer to the deflection yoke lock screw,
magnet unit (purity, 4-pole, 6-pole magnets)
and magnet unit lock screw.
Finally received the Red-only and Blue-only
signals to make sure there is no other colours
on the screen.
Fig. 5-2
Fig. 5-1
Fig. 5-3
Fig. 5-4
Fig. 5-5
Fig. 5-6

9
20U200, 20U250
51U200, 51U250
51U500, 51U550
9-1 9-2
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.
1. Switch TV toVIDEO 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
4. Adjust SCREEN VR, so that the tip of signal
reach 3.0 ±0.1 Vdc.
CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1
2 SUB-
BRIGHTNESS
ADJUSMENT
(I2C BUS
CONTROL)
1, 2 and 3 are in same black level.
CRT CUTOFF
ADJUSTMENT
(I2C BUS
CONTROL)
Fig. 6
3 WHITE
BALANCE
SERVICE
MODE ADJ.
(I2C BUS
CONTROL)
1. Receive the "Monoscope Pattern with BURST"
signal.
2. Press R/C to set Picture NORMAL condition.
3. Connect the DC miliammeter betweenTP602
(-) andTP603 (+).
4. Check Beamcurrent shouldbe around1,100 µA.
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 BURSTSignal, and
set Brightness Y by generator, to** 10 cd/m2
(Minolta CA-100) by reducing LuminateY 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).
* 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-BC=DRI-BS
DRI-BW DATA="DRI-BS" -7 DATA
** Low=10 cd/m2: High=120 cd/m2
Refer to Page 7.
* 12,300°K X : 0.272
Y : 0.275
(MINOLTA COLOUR ANALYZER
CA-100)
(Note): Above Data can be UP/
DOWN byVolume key.
4 Maximum
beam check 1. Receive the "Monoscope Pattern" signal. 2. Press R/C to set Picture NORMAL condition.
3. Connect the DC miliammeter betweenTP603
(+) andTP602 (–).
(Full Scale: 3 mA Range)
4. Beam current must be within 1,100 ±100 µA.
1 V
3.0Vdc
0
1 2 3 4 5
Fig. 7
HORIZONTAL,VERTICAL, DEFLECTION LOOP AND FOCUS ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1
2
3
4
5
6
V-SLOPE
(I2C BUS
CONTROL)
V-SHIFT
(I2C BUS
CONTROL
V-AMP
(I2C BUS
CONTROL)
S-CORREC-
TION (I2C
BUS CON-
TROL)
H-SHIFT (50)
(H - CENTER)
(I2C BUS
CONTROL)
FOCUS
1. Receive "PAL 50Hz Monoscope Pattern"
Signal.
2. Call the "V-LIN" mode.
3. Increase or decrease "V-LIN" byVolume 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" byVolume key
till the picture is centered.
1. Call the "V-AMP" mode.
2. Increase or decrease "V- AMP" byVolume key
to set overscan of 8.5% typical.
Adjustment Spec 8.5% range +1% -0%.
FIXED DATA, NO NEED TO ADJUST.
1. Call the "H-CENT" mode.
2. Increase ordecrease "H-CENT" byVolumekey
to center the picture horizontal.
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.
PAL CHROMA ADJUSTMENT
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1SUB 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
(Between C881 and R885).
»Range :20V/div.(AC)(Using 10:1probe)
»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 Colour
Bar be at the same level shown as Fig. 8.
5. Clear the SERVICE mode.
Cy GB
WY 100%W
75% Mg R
Fig. 8

10
20U200, 20U250
51U200, 51U250
51U500, 51U550
10-1 10-2
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
through AV in.
2. Connect the oscilloscope toTP853 (Pin (5) of
P882) 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. 9.
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 ofQ883/5/7 todo each
short test.
2 H, V Protector 1. Receive "Monoscope Pattern" signal.
2. Connect output of Bias Box to D607 cathode
(R606 side).
3. Set voltage of Bias Box to 18V and make sure
the protector is not work.
4. Set voltage of Bias Box to 27V, and make sure
the protector is work.
A/V INPUT AND OUTPUT CHECKING
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 VIDEO AND
AUDIO OUT-
PUT Check
1. Receive the "PAL Colour 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
(1.0Vp-p ±3 dB).
3. Terminate the Audio output with a 10k ohm im-
pedance.Make sure the output is as specified
(1.76Vp-p ±3 dB).
2 VIDEO AND
AUDIO INPUT
Check
1. Using theTV/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.
3 Other
Protectors 1. Once finishrectified ElectrolyticCapacitor short testing in +B line, check all possible damaged
components on +B line.
(Use random selected set for inspection)
WYCy G Mg R B
Fig. 9
SIF (NICAM/IGR) ADJUSTMENT (51R500/550 ONLY)
NO. Adjustment part Adjusting procedure and conditions Waveform and others
1 VCO COIL
T2300 1. Receive "PAL Colour Bar" signal. (Set AFT OFF, 203.25 MHz frequency)
2. Connect DC Voltmeter to Pin (1) of P2301
(Main Unit). (TP2300 in NICAM/IGR Unit)
3. Check and turn T2300 counter-clockwise (Left)
to 0V and then turn it clockwise (Right) until
TP2300 become 5V.After that, turn T2300
counter-clockwise (Left) untilTP2300 become
2.5 ± 0.1 Vdc.
* UNIT BOARD ADJUSTMENT
Vcc 5.0 ± 0.1 Vdc
IF Input Frequency 38.9 MHz ± 10 KHz
Adjust T2300 until TP2300 (NICAM/IGR Unit)
become 2.5 ± 0.1 Vdc.
Check after assembly NICAM Board
Test Point: Pin (1) of P2301 (Main Unit)
Preset selected reception frequency (AFT
OFF)
CheckVoltage 2.5 ± 1.0Vdc.
Precaution: The Vcc, f0 and other factors are
considered in the unit board of the
1.0 V tolerance which differ from the
adjustment accuracy.
3 SUBWOOFER
OUTPUT
Check
1. Receive "PAL Colour Bar" signal ( Sound
400Hz, 100% Mod.)
2. Set the sound output to 2 Vrms by volume key.
(Speaker Impedance: 8 Ohm, Sound Output:
500mW)
3. Terminate the "Sub - Woofer" output with a 22
kΩimpedance.Make sure that the output is
5.6Vp-p ± 3dB.