Sharp 25WF30 User manual

1
25WF30
WARNING
Thechassisinthisreceiverispartiallyhot. Useanisolationtransformerbetweenthelinecordplugandpower
receptacle,whenservicingthischassis. Topreventelectricshock,donotremovecover. Nouser–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 25WF30
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. NFC
Page
CONTENTS
»SPECIFICATIONS .............................................2
»IMPORTANT SERVICE NOTES........................2
»ADJUSTMENT PRECAUTIONS........................3
»TROUBLE SHOOTING TABLE .......................13
»CHASSIS LAYOUT..........................................18
»BLOCK DIAGRAM...........................................19
»WAVEFORMS..................................................27
»DESCRIPTION OF SCHEMATIC DIAGRAM ..28
»SCHEMATIC DIAGRAM
ËCRT UNIT.....................................................29
ËMAIN UNIT ...................................................30
ËPOWER UNIT ..............................................34
Page
ËOPERATION UNIT .......................................36
»PRINTED WIRING BOARD ASSEMBLIES .....37
»SOLID STATE DEVICE BASE DIAGRAM.......45
»REPLACEMENT PARTS LIST
ËELECTRICAL PARTS ..................................46
ËSUPPLIED ACCESSORIES.........................54
ËMISCELLANEOUS PARTS..........................54
ËPACKING PARTS.........................................54
ËCABINET PARTS .........................................55
»PACKING OF THE SET...................................56
FEATURES
Ë100 CH Program Memory
ËAV Mode (Standard/ Dynamic/ Soft)
ËCATV Hyper Band Ready
ËColour Comb Filter (NTSC)
ËON/OFF Velocity Modulation
ËBlack Stretch Circuit
ËPicture Noise Reduction
ËWhite Temp. Select
ËAperture Control
ËBass+
ËMulti Language (English/Thai)
ËMono / Bilingual Select
ËON/OFF Reminder Timer
ËPower Save Mode
ËRear AV-In 1 & 2, S-Video In, AV Output
(Monitor Out), Headphone and Front AV-In 3
ËComponent Intput Terminal
S21Q425WF30//

2
2-1 2-2
25WF30
SPECIFICATIONS
Convergence ..............................................................................Self Convergence System Focus ..................................................................... Bi-Potential, Uni-Potential Electrostatic Sweep Deflection................................................................................................... Magnetic Intermediate Frequency
Picture IF Carrier ............................................................................................... 38.9 MHz Sound IF Carrier
5.5 MHz .............................................................................................. 33.16 / 33.4 MHz
Colour Sub-Carrier
PAL ............................................................................................................... 34.47 MHz NTSC............................................................................................................ 35.32 MHz
Power Input .................................................................................. AC 110 - 240V, 50/60 Hz Power Consumption ...................................................................................................158 W Audio Power Output Rating.......................................................................... 10W ×2 (Max) Speaker
Size ......................................................................................................6 ×12 cm ×2 pcs.
Aerial Input Impedance ....................................................................... 75 ohm Unbalanced
Receiving Channels PAL-B/G
VHF .......................................................................................................E2 thru E12 UHF .....................................................................................................E21 thru E69 CATV .......................................................................................................X thru Z + 2,
S1 thru S41
Receiving Frequency
VHF ...................................................................................... 44.25 MHz thru 423.25 MHz UHF....................................................................................431.25 MHz thru 863.25 MHz
Dimensions ...............................................................................................Width: 622 mm
Height : 586.5 mm
Depth : 484 mm
Weight (Approx): 37 kg
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 33.0 kV (at beam 0 µµ
µµ
µA) for the set.
2. To keep the set in a normal operation, be sure to make it function on 29.0
±1.5 kV (at beam 1,600 µµ
µµ
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 Beforereturning thereceiver to theuser, performthe following safetychecks. 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,cabinetbacks,adjustmentandcompartmentcoversorshields,iso- lation resistor-capacity networks, mechanical insulators and etc.

3
3-1 3-2
25WF30
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 JA373 and JA374, enter into the service 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. 5When the short circuit between JA373 and JA374 is cut off, it will be released from the
service mode.
2. Factory Presetting.
1Make a short-circuit JA373 and JA374 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 page. 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 JA373 and JA374 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.
SERVICE MODE
RASTER MODE
Press the MENU button at the remote controller, it will enter into Service Mode Option.
Press the MENU button again at the remote controller, it will jump back to Service Mode 1.
Press service/ language for 2 sec, it will enter into service mode 2. Press service/ language for 2 sec again, it will jump back to service mode 1.
FORWARD : CH DOWN KEY
REVERSE : CH UP KEY
R-CUT OFF G-CUT OFF B-CUT OFF
KEY
R-CUT OFF G-CUT OFF B-CUT OFF G-DRIVE B-DRIVE
UP
1 KEY 2 KEY 3 KEY 7 KEY 8 KEY
DOWN
4 KEY 5 KEY 6 KEY F/B KEY 0 KEY
3 sec. TIME OUT
CUT OFF MODE
SERVICE MODE 1
1.) In the Service Mode, Key is used to select the mode in the following order.
CUT OFF/ BKGD MODE
50Hz ADJ. MODE
SERVICE MODE 2
SUB 2 ADJ. MODE
SERVICE MODE
OPTION
60 Hz ADJ. MODE SUB 1 ADJ.
MODE
CUT OFF
BKGD
MODE
LATERAL MODE
(R, G, B-CUT OFF)
G-DRIVE B-DRIVE
3 sec. TIME OUT
DATA
LENGTH
DRIVE
"—/——" INITIAL
DATA
0 - 127 63
DATA
LENGTH
CUT OFF
INITIAL
DATA
63 - 255 63

4
4-1 4-2
25WF30
FORWARD : CH DOWN KEY REVERSE : CH UP KEY
V-SIZE 50 Hz (V-SIZE 50) V-LINEARITY 50 Hz (V-LINE 50) VS-CORRECTION 50 Hz (VS-CORR 50) V-POSITION 50 Hz (V-CENT 50)
50 Hz ADJ. MODE
TRAPEZIUM 50 Hz (TRAPE 50) E/W CORNER 50 Hz (E/W COR 50) E/W PARABOLA 50 Hz (E/W PAR 50) H-SIZE 50 Hz (H-SIZE 50) H-POSITION 50 Hz (H-CENT 50)
V-SIZE 60 Hz (V-SIZE 60) V-LINEARITY 60 Hz (V-LINE 60) VS-CORRECTION 60 Hz (VS-CORR 60) V-POSITION 60 Hz (V-CENT 60)
60 Hz ADJ. MODE
SECAM R-Y (SCM R-Y) SECAM B-Y (SCM B-Y) BRIGHT (SUB BRI) BRIGHT (DVD) (SUB BRI DVD) SUB CONT (SUB CONT) SUB CONT (DVD) (SUB CONT DVD) SUB TINT (SUB TINT) SUB TINT (DVD) (SUB TINT DVD)
SUB 1
TRAPEZIUM 60 Hz (TRAPE 60) E/W CORNER 60 Hz (E/W COR 60) E/W PARABOLA 60 Hz (E/W PAR 60) H-SIZE 60 Hz (H-SIZE 60) H-POSITION 60 Hz (H-CENT 60)
SUB COLOR (SUB COLOR) SUB COLOR (DVD) (SUB COLOR DVD) V-ENT (V-ENT) H-ENT (H-ENT) RF AGC (RF AGC) SECAM BELL (SCM BELL) SPRIT/INTER (S/I) RF SUB SOUND (RF S-SOUND) HEAD PHONE (HP SUB VOL) SUB VOLUME ADJ. COLOR TEMP. (WT) PIFVCO (PIFVCO) LNA (LNA) SIF574 (SIF574) AFC (AFC)
SUB 2
User Data in Service Mode Option
• While SERVICE MODE 1 on, EEPROM DATA will switch to the service data.
Also, once press the menu button at the remote controller, EEPROM will switch to SERVICE MODE OPTION. Oncepress the menu button againat the remote controller, EEPROM willswitch back to SERVICE MODE 1.
• In the service option the user data establish as below,
Service Mode Option
No. EEPROM ITEM DATA LENGTH OSD IC DATA SETTING INITIAL
DATA
1 COMB OPTION ON/OFF COMB OP OPTION OFF 2 DVD OPTION ON/OFF DVD OP OPTION OFF 3 PAL OPTION ON/OFF PAL OP OPTION ON 4 6.5 M SIF FIX 0 ~ 1 6.5 M 1 CHIP 6.5 M SIF FIX (1) 0 5 ROTATION OPTION ON/OFF ROTA OP OPTION OFF 6 SYAKIT OPTION ON/OFF SYAKIT OP OPTION OFF 7 SPATIALIZER OPTION ON/OFF SPA OP OPTION OFF 8 FLAT OPTION ON/OFF FLAT OP OPTION (ON:FL) OFF 9 SPEAKER 1 ~ 3 SPEAKER OPTION SP1 (1) 1
10 HOTEL ON/OFF ON/OFF H MODE OPTION OFF
11 HOTEL POSITION 0 ~ 99 H POSITION OPTION 0
12 HOTEL VOLUME 0 ~ 60 H VOLUME OPTION 0 13 LANGUAGE OPTION 1 ~ 2 LANG OPTION 2 14 MONO BILINGUAL ON/OFF MO/BIL OPTION OFF
SERVICE MODE
No. EEPROM ITEM DATA
1 COMB ON 2 DVD ON 3 PAL ON 4 6.5 M 1 5 ROTA OFF 6 SYAKIT OFF 7 SPA OFF 8 FLAT ON 9 SPEAKER 1
10 H MODE OFF
11 H POS 0
12 H VO 0 13 LANG 2 14 MO / BIL ON

5
5-1 5-2
25WF30
After short JA373 & JA374, and turn on the main power switch, read data from EEPROMAddress 00H ~ 03H, and compare to the list below, if different, initialize the EEPROM.
Address Data Address Data
00H 23H 02H 18H 01H 23H 03H A3H
1. SERVICE MODE 1
No. EEPROM SETTING
DATA LENGTH
OSD IC DATA SETTING
INITIAL
EEPROM
DATA
0 MICOM INFO. DISPLAY SERVICE MODE 1 CUT OFF REFER # CUTOFF BKGD 2 CUT OFF (DVD) REFER # CUTOFFBKGD (DVD) 3 V-SIZE 0 ~ 63 V-SIZE 50 1 CHIP V-SIZE 30 4 V-LINEARITY (50Hz) #2 0 ~ 15 V S-LINE 50 1 CHIP V-LINEARITY 10 5
VS-CORRECTION (50Hz) #2
0 ~ 15 V S-CORR 50 1 CHIP
V S-CORRECTION
8
6 V-POSITION #2 0 ~ 7 V-CENT 50 1 CHIP V-PHASE 5 7 H-POSITION #2 0 ~ 31 H-CENT 50 1 CHIP H-PHASE 11 8 H-SIZE (50Hz) #2 0 ~ 63 H-SIZE 50 1 CHIP H-SIZE 32 9
E/W-PARABOLA (50Hz) #2
0 ~ 63 E/W PAR 50 1 CHIP E/W PARABORA 39
10 E/W CORNER (50Hz) #2 0 ~ 15 E/W COR 50 1 CHIP E/W CORNER 6
11 TRAPEZIUM (50Hz) #2 0 ~ 31 TRAPE 50 1 CHIP TRAPEZIUM 17
12 SECAM R-Y #3 0 ~ 15 SCM R-Y 1 CHIP SR-Y 8 13 SECAM B-Y #3 0 ~ 15 SCM B-Y 1 CHIP SB-Y 8 14 BRIGHT 0 ~ 127 SUB BRI 1 CHIP BRIGHTNESS 80 15 BRIGHT (DVD) 0 ~ 127 SUB BRI DVD 1 CHIP BRIGHTNESS 80 16 SUB CONT 0 ~ 15 SUB CONT 1 CHIP SUB CONT 3 17 SUB CONT (DVD) 0 ~ 15 SUB CONT DVD 1 CHIP SUB CONT 3 18 TINT 0 ~ 127 SUB TINT 1 CHIP TINT 64 19 TINT (DVD) 0 ~ 127 SUB TINT DVD 1 CHIP TINT 16 20 V-SIZE 0 ~ 63 V-SIZE 60 1 CHIP V-SIZE 39 21 V-LINEARITY 0 ~ 15 V-LINE 60 1 CHIP V-LINEARITY 10 22 VS-CORRECTION (60Hz) 0 ~ 15 V S-CORR 60 1 CHIP
V S-CORRECTION
9
23 V-POSITION (60Hz) 0 ~ 7 V-CENT 60 1 CHIP V-PHASE 2 24 H-POSITION (60Hz) 0 ~ 31 H-CENT 60 1 CHIP H-PHASE 14 25 H-SIZE (60Hz) 0 ~ 63 H-SIZE 60 1 CHIP H-SIZE 34 26 E/W PARABOLA (60Hz) 0 ~ 63 E/W PAR 60 1 CHIP E/W PARABORA 19 27 E/W CORNER (60Hz) 0 ~ 15 E/W COT 60 1 CHIP E/W CORNER 4 28 TRAPEZIUM (60Hz) 0 ~ 31 TRAPE 60 1 CHIP TRAPEZIUM 6 29 COLOUR 0 ~ 127 SUB COL 1 CHIP COLOUR 60 30 COLOUR (DVD) 0 ~ 127 SUB COL DVD 1 CHIP COLOUR 60 45 31 V-ENT 0 ~ 7 V-ENT 1 CHIP V-ENT 6 32 H-ENT 0 ~ 7 H-ENT 1 CHIP H-ENT 4 33 RF AGC 0 ~ 63 RF AGC 1 CHIP RF AGC 46 34 SECAM BELL 0 ~ 1 SCM BELL 1 CHIP S BELL 0 35 SPRIT/INTER 0 ~ 1 S/I 1 CHIP SPRIT/INTER 0 36 RF SUB SOUND 0 ~ 127 RF S-SOUND 1 CHIP RF SUB SOUND 96 37 SUB VOLUME 0 ~ 63 SUB VOL SOR/SPA VOLUME 45 38
H. PHONE SUB VOL.ADJ.
0 ~ 63 HP SUB VOL SOR/SPA VOLUME 63
39 COLOUR TEMP. 0 ~ 1 WT OPTION 1 40 PIF VCO #4 PIFVCO - 41 LNA ON/OFF LNA OPTION OFF 42 SIF574 ON/OFF SIF574 1 CHIP SIF574 OFF ON 43 AFC AFC OFF
#1 Whiles selecting SERVICE MODE 1, MICOM Version Information, SOFTWARE Version Informa-
tion, check some iformation will be displayed.
#2 60 Hz Adjustment Value is programmed from ± 50 HzAdjustment value (± will be informed later) #3 While adjusting SECAM R-Y, SECAM B-Y and S BLACK of 1 chip is set to 1. #4 While choosing PIFVCO MODE and RF AGC set to "0 0" and PIFVCO is set to "1".
2. SERVICE MODE 2
NO. EEPROM ITEM
DATA LENGTH
OSD IC DATA SETTING
INITIAL EEPROM
DATA
1 WPS 0 ~ 1 WPS 1 CHIP WPS 1 2 SUB CONTRAST 0 ~ 127 S CONT 1 CHIP CONTRAST 127 3 NTSC PHASE (NT) 0 ~ 3 N-PNT 1 CHIP NTSC PHASE 0 4 NTSC PHASE (PAL/SEC.) 0 ~ 3 N-P PS 1 CHIP NTSC PHASE 0 5 NTSC PHASE (DVD) 0 ~ 3 N-PD 1 CHIP NTSC PHASE 3 6 SUB SHARPNESS (TV) 0 ~ 63 S SHARP T 1 CHIP SHARPNESS 10 12 7 SUB SHARPNESS (AV) 0 ~ 63 S SHARP A 1 CHIP SHARPNESS 10 20 8 SUB SHARPNESS (DVD) 0 ~ 63 S SHARP D 1 CHIP SHARPNESS 10 20 9 RGB MUTE 0 ~ 1 RGB MUTE 1 CHIP RGB MUTE OFF
10 RGB CONTRAST 0 ~ 63 RGB CONT 1 CHIP RGB CONTRAST 32
11 Y-DL (NTSC-M) 0 ~ 3 YNM 1 CHIP Y-DL 1
12 Y-DL (PAL-B/G) 0 ~ 3 YPB 1 CHIP Y-DL 1 13 Y-DL (PAL-I) 0 ~ 3 YPI 1 CHIP Y-DL 3 14 Y-DL (PAL-D/K) 0 ~ 3 YPD 1 CHIP Y-DL 3 15 Y-DL (SECAM-B/G) 0 ~ 3 YSB 1 CHIP Y-DL 0 16 Y-DL (SECAM-D/K) 0 ~ 3 YSD 1 CHIP Y-DL 3 17 Y-DL (B/W) 0 ~ 3 YBW 1 CHIP Y-DL 0 18 Y-DL (NTSC-AV) 0 ~ 3 YNA 1 CHIP Y-DL 0 19 Y-DL (PAL-AV) 0 ~ 3 YPA 1 CHIP Y-DL 0 20 Y-DL (SECAM-AV) 0 ~ 3 YSA 1 CHIP Y-DL 0 21 Y-DL (B/W-AV) 0 ~ 3 YBA 1 CHIP Y-DL 0 22 SUB COLOUR 0 ~ 31 SUB COL 1 CHIP SUB-COLOUR 16 23 VSM GAIN AVM1 0 ~ 7 V-GAIN 1 1 CHIP VSM GAIN 3 24 VSM GAIN AVM2 0 ~ 7 V-GAIN 2 1 CHIP VSM GAIN 5 25 VSM GAIN AVM3 0 ~ 7 V-GAIN 3 1 CHIP VSM GAIN 7 26 BASE BAND TINT 0 ~ 31 B-B TINT 1 CHIP BASE BAND TINT 27 SECAM GP-PHASE 0 ~ 3 S G-PHASE 1 CHIP S SP-PHASE 1 28 SECAM ID-SENS 0 ~ 1 S ID-SENS 1 CHIP S ID-SENS 0 29 SECAM ID-MODE 0 ~ 1 S ID-MODE 1 CHIP S ID-MODE 0 30 PIF FREQ 0 ~ 7 P FREQ 1 CHIP PIF FREQ 3 31 P/N-ID 0 ~ 1 PN ID 1 CHIP P/N-ID 0 32 YS/YM MODE 0 ~ 1 YSM MODE 1 CHIP YSM MODE 1 33 RGB ABCL 0 ~ 1 RGB ABCL 1 CHIP RGB ABCL 1 34 DC RESTORATION 0 ~ 3 DC REST 1 CHIP
DC RESTORATION
3
35 BLACK STRETCH 0 ~ 3 B ST 1 CHIP BLACK STRETCH 1 36 ABL START POINT 0 ~ 3 ABL ST 1 CHIP
ABL START POINT
3
37 ABL GAIN 0 ~ 3 ABL GA 1 CHIP ABL GAIN 2 38 AKB MODE 0 ~ 63 AKB MODE 1 CHIP AKB MODE 0 39 COLOUR 0 ~ 1 COL G 1 CHIP COLOUR 1 40 V AGC 0 ~ 1 V AGC 1 CHIP VAGC 0 41 V RAMP REF 0 ~ 1 V RAMP 1 CHIP V RAMP 1 42 VSM PHASE 0 ~ 1 VSM PHASE 1 CHIP VSM PHASE 0 43 BASS LEVEL ON 0 ~ 3 BA LV SUR/SPA BASS LEVEL 0 44 BASS OFF AVM1 SP1 0 ~ 4 #1 BA OFF 1 SP1 SUR/SPA BASS SW, LEVEL 4 45 BASS OFF AVM2 SP1 0 ~ 4 #1 BA OFF 2 SP1 SUR/SPA BASS SW, LEVEL 4 46 BASS OFF AVM3 SP1 0 ~ 4 #1 BA OFF 3 SP1 SUR/SPA BASS SW, LEVEL 4 47 BASS OFF AVM1 SP2 0 ~ 4 #1 BA OFF 1 SP2 SUR/SPA BASS SW, LEVEL 4 48 BASS OFF AVM2 SP2 0 ~ 4 #1 BA OFF 2 SP2 SUR/SPA BASS SW, LEVEL 4 49 BASS OFF AVM3 SP2 0 ~ 4 #1 BA OFF 3 SP2 SUR/SPA BASS SW, LEVEL 4 50 BASS OFF AVM1 SP3 0 ~ 4 #1 BA OFF 1 SP3 SUR/SPA BASS SW, LEVEL 4 51 BASS OFF AVM2 SP3 0 ~ 4 #1 BA OFF 2 SP3 SUR/SPA BASS SW, LEVEL 4 52 BASS OFF AVM3 SP3 0 ~ 4 #1 BA OFF 3 SP3 SUR/SPA BASS SW, LEVEL 4 53 BASS OFF AVM1 SP4 0 ~ 4 #1 BA OFF 1 SP4 SUR/SPA BASS SW, LEVEL 4 54 BASS OFF AVM2 SP4 0 ~ 4 #1 BA OFF 2 SP4 SUR/SPA BASS SW, LEVEL 4

6
6-1 6-2
25WF30
NO. EEPROM ITEM
DATA LENGTH
OSD IC DATA SETTING
INITIAL EEPROM
DATA
55 BASS OFF AVM3 SP4 0 ~ 4 #1 BA OFF 3 SP4 SUR/SPA BASS SW, LEVEL 4 56 AGC SW 0 ~ 1 AGC SW SUR/SPA AGC SW ON 57 AGC ADJ 0 ~ 3 AGC AD SUR/SPA AGC ADJ 3 2 58 FM LEVEL #2 FM L NICAM FM LEVEL +1 59 IGR LEVEL #2 IGR L NICAM IGR LEVEL +2 60 NICAM B/G LEVEL #3 BG L NICAM NICAM B/G LEVEL -1 61 NICAM 1 LEVEL #3 I L NICAM NICAM I LEVEL +4 62 NICAL D/K LEVEL #3 DK L NICAM NICAM D/K LEVEL -1 63 LOWER ERROR 0 ~ 255 L ERR NICAM LOWER ERROR 35 64 UPPER ERROR 0 ~ 255 U ERR NICAM UPPER ERROR 70 65 IGR GAIN (9873H) #4 IGR G NICAM IGR GAIN (9873H) 0 66 NICAM SPEED 0 ~ 3 N SPEED NICAM N SPEED 2 67 INTER/EXTER 0 ~ 1 IN/EX NICAM INTER/EXTER 0 68 AUTO MUTE 0 ~ 1 AM NICAM AUTO MUTE OFF ON 69 AGC SW ON/OFF 0 ~ 1 AGC SW NICAM AGC SW OFF 70 AGC GAIN 0 ~ 31 AGC G NICAM AGC GAIN 16 71 SYAKIT VOLUME 1 0 ~ 21 SVOL 1 SYAKIT SVOLUME 1 0 72 SYAKIT VOLUME 2 0 ~ 3 SVOL 2 SYAKIT SVOLUME 2 0 73 SYAKIT LOU 0 ~ 1 SLOU SYAKIT SLOU 1 74 SYAKITATT 0 ~ 7 SATT SYAKIT SATT OUT 0 75 SYAKIT BASS 0 ~ 13 SBASS SYAKIT S-BASS 6 76 SYAKIT TREBLE 0 ~ 13 STRE SYAKIT S-TREBLE 6 77 MAX LEVEL SYAKIT 1 0 ~ 5 S1MA 3 78 MAX LEVEL SYAKIT 2 0 ~ 5 S2MA 4 79 MAX LEVEL SYAKIT 3 0 ~ 5 S3MA 6 80 START LEVEL SYAKIT 1 0 ~ 63 S1ST 17 81 START LEVEL SYAKIT 2 0 ~ 63 S2ST 21 82 START LEVEL SYAKIT 3 0 ~ 63 S3ST 20 83 WIDE LEVEL SYAKIT 1 0 ~ 7 S1W1 6 84 WIDE LEVEL SYAKIT 2 0 ~ 7 S2W1 3 85 WIDE LEVEL SYAKIT 3 0 ~ 7 S3W1 3 86 STOP LEVEL SYAKIT 1 0 ~ 5 S1SP 1 87 STOP LEVEL SYAKIT 2 0 ~ 5 S2SP 1 88 STOP LEVEL SYAKIT 3 0 ~ 5 S3SP 1 89 BASS MAX SYAKIT 1 0 ~ 15 SBASS1 12 90 BASS MAX SYAKIT 2 0 ~ 15 SBASS2 11 91 BASS MAX SYAKIT 3 0 ~ 15 SBASS3 10 92 TREBLE MAX SYAKIT 1 0 ~ 15 STRE1 12 93 TREBLE MAX SYAKIT 2 0 ~ 15 STRE2 11 94 TREBLE MAX SYAKIT 3 0 ~ 15 STRE3 10 95 BASS AVM1 SP1 #6 BASS 1 SP1 -5 96 BASS AVM2 SP1 #6 BASS 2 SP1 +2 97 BASS AVM3 SP1 #6 BASS 3 SP1 +5 98 BASS AVM1 SP2 #6 BASS 1 SP2 -5 99 BASS AVM2 SP2 #6 BASS 2 SP2 0
100 BASSAVM3 SP2 #6 BASS 3 SP2 +5 101 BASSAVM1 SP3 #6 BASS 1 SP3 -5 102 BASSAVM2 SP3 #6 BASS 2 SP3 0 103 BASSAVM3 SP3 #6 BASS 3 SP3 +10 104 BASSAVM1 SP4 #6 BASS 1 SP4 -5 105 BASSAVM2 SP4 #6 BASS 2 SP4 -2 106 BASSAVM3 SP4 #6 BASS 3 SP4 +6 107 TREBLEAVM1 SP1 #6 TRE 1 SP1 -5 108 TREBLEAVM2 SP1 #6 TRE 2 SP1 0 109 TREBLEAVM3 SP1 #6 TRE 3 SP1 +5
110 TREBLE AVM1 SP2 #6 TRE 1 SP2 -5
NO. EEPROM ITEM
DATA LENGTH
OSD IC DATA SETTING
INITIAL EEPROM
DATA
111 TREBLEAVM2 SP2 #6 TRE 2 SP2 +2
112 TREBLE AVM3 SP2 #6 TRE 3 SP2 +8 113 TREBLE AVM1 SP3 #6 TRE 1 SP3 -10 114 TREBLE AVM2 SP3 #6 TRE 2 SP3 0 115 TREBLE AVM3 SP3 #6 TRE 3 SP3 +5 116 TREBLE AVM1 SP4 #6 TRE 1 SP4 -10 117 TREBLE AVM2 SP4 #6 TRE 2 SP4 +2 118 TREBLE AVM3 SP4 #6 TRE 3 SP4 +6 119 BASS MODE AVM1 SP1 ON/OFF #7 BA MO 1 SP1 OFF
120 BASS MODE AVM2 SP1 ON/OFF #7 BA MO 2 SP1 OFF 121 BASS MODE AVM3 SP1 ON/OFF #7 BA MO 3 SP1 ON 122 BASS MODE AVM1 SP2 ON/OFF #7 BA MO 1 SP2 OFF 123 BASS MODE AVM2 SP2 ON/OFF #7 BA MO 2 SP2 OFF 124 BASS MODE AVM3 SP2 ON/OFF #7 BA MO 3 SP2 ON 125 BASS MODE AVM1 SP3 ON/OFF #7 BA MO 1 SP3 OFF 126 BASS MODE AVM2 SP3 ON/OFF #7 BA MO 2 SP3 OFF 127 BASS MODE AVM3 SP3 ON/OFF #7 BA MO 3 SP3 ON 128 BASS MODE AVM1 SP4 ON/OFF #7 BA MO 1 SP4 OFF 129 BASS MODE AVM2 SP4 ON/OFF #7 BA MO 2 SP4 OFF 130 BASS MODE AVM3 SP4 ON/OFF #7 BA MO 3 SP4 ON 131 CONTRASTAVM1 #8 CONT 1 55 132 CONTRASTAVM2 #8 CONT 2 57 133 CONTRASTAVM3 #8 CONT 3 60 134 CONTRAST AVM1 FL #8 CONT 1 FL 55 135 CONTRAST AVM2 FL #8 CONT 2 FL 57 136 CONTRAST AVM3 FL #8 CONT 3 FL 60 137 COLOUR AVM1 #9 COL 1 0 138 COLOUR AVM2 #9 COL 2 0 139 COLOUR AVM3 #9 COL 3 +10 140 COLOUR AVM1 FL #9 COL 1 FL 0 141 COLOUR AVM2 FL #9 COL 2 FL 0 142 COLOUR AVM3 FL #9 COL 3 FL +10 143 SHARP AVM1 #10 SHARP 1 -5 144 SHARP AVM2 #10 SHARP 2 0 145 SHARP AVM3 #10 SHARP 3 0 146 SHARP AVM1 FL #10 SHARP 1 FL -5 147 SHARP AVM2 FL #10 SHARP 2 FL 0 148 SHARP AVM3 FL #10 SHARP 3 FL 0 149 γ- POINTAVM1 #11 G-POINT 1 3 150 γ- POINTAVM2 #11 G-POINT 2 2 151 γ- POINTAVM3 #11 G-POINT 3 1 152 γ- POINTAVM1 FL #11 G-POINT 1 FL 3 153 γ- POINTAVM2 FL #11 G-POINT 2 FL 2 154 γ- POINTAVM3 FL #11 G-POINT 3 FL 1 155 SEARCH SPEED #12 S SPE 450 156 OSD 0 ~ 127 OSD-H 2 157 BUZZ 0 ~ 1 BUZZ 1 CHIP BUZZ 0 158 AV AFC 0 ~ 1 AV AFC 1 159 TEXT H 0 ~ 63 TEXT H TEXT 30 160 TEXT V 0 ~ 63 TEXT V TEXT 30 161 NVM NVM EEPROM

7
7-1 7-2
25WF30
INITIAL SETTING
(1) Execute MCL 4key to set the following data in EEPROM.
STTM
R/C CODE MCL 4(171:Abh)
TV-CH. CH-No. Fv (MHz) S-SYSTEM
0 1 Thai Local CH-3 55.25 PAL B/G 2 Thai Local CH-5 175.25 PAL B/G 3 Thai Local CH-7 189.25 PAL B/G 4 Thai Local CH-9 203.25 PAL B/G 5 Thai Local CH-11 217.25 PAL B/G 6 Thai Local CH-29 535.25 PAL B/G 7 8 9
10 11 STTM Factory CH-E2 48.25 PAL B/G 12 STTM Factory CH-E4 62.25 PAL B/G 13 STTM Factory CH-E8 196.25 PAL B/G 14 STTM Factory CH-E10 210.25 SECAM B/G 15 STTM Factory CH-E12 224.25 PAL B/G 16 STTM Factory CH-E21 471.25 PAL B/G 17 STTM Factory CH-E69 855.25 PAL B/G 18 19 20 21 STTM Factory CH-E12 223.95 PAL B/G 22 STTM Factory CH-E12 224.55 PAL B/G 23 STTM Factory CH-E12 223.85 PAL B/G 24 STTM Factory CH-E12 224.65 PAL B/G 25 STTM Factory CH-E12 223.75 PAL B/G 26 STTM Factory CH-E12 224.75 PAL B/G 27 28 29 30 31 STTM Factory CH-J1 91.25 NTSC M 32 STTM Factory CH-J3 103.25 NTSC M 33 STTM Factory CH-J4 171.25 NTSC M 34 STTM Factory CH-J6 183.25 NTSC M 35 STTM Factory CH-J8 193.25 NTSC M 36 STTM Factory CH-J10 205.25 NTSC M 37 STTM Factory CH-J12 217.25 NTSC M
38 STTM Factory CH-J38 217.25 NTSC M
SHIPPING SETTING AND CHECKING
(1) The following default data has been factory-set for the E2PROM.
ITEMS DATA SETTING
FACTORYSET 9
R/C 238(EEh)
S-SYSTEM B/G
LANGUAGE THAI
SELECT
MODE 1 2 3
SOFT STANDARD DYNAMIC
CONTRAST # # #
COLOUR # # #
BRIGHT 0 0 0
TINT 0 0 0
SHARPNESS # # #
PEICTURE NR OFF OFF OFF
WHITE TEMP 0 0 0
SHAKIT OFF OFF OFF
BASS + # # #
SOR/SPA OFF OFF OFF
LEVEL 0 0 0
BASS # 0 #
TREBLE # 0 #
# SERVICE MODE DATA
ITEM DATA SETTING
VM OFF TEXT 1 LNA OFF ON TIMER IN ACTIVE ON TIMER CH IN ACTIVE ON TIMER VOLUME IN ACTIVE REMINDER IN ACTIVE AFT ALL CH ON COLOUR SYSTEM ALL CH AUTO SKIP ALL CH OFF NICAM ON/OFF ALL CH ON NICAM STEREO MODE ALL CH STEREO NICAM BILINGUAL MODE ALL CH M1 NICAM MONO MODE ALL CH MONO IGR ON/OFF ALL CH ON IGR STEREO MODE ALL CH STEREO IGR BILINGUAL MODE ALL CH MAIN MONO BILINGUAL MODE SOUND1
ITEM DATA SETTING
LAST POWER ON LAST TV/AV MODE TV LAST CH CH1 FLASH BACK CH1 FAVORITE CH1 CH10 FAVORITE CH2 CH20 FAVORITE CH3 CH30 FAVORITE CH4 CH40 1 DIGIT/2 DIGIT 2 DIGIT VOLUME 0 H/P-VOLUME 0 ROTATION 0 SAVE OFF AV MODE 2 BALANCE 0 BLUE BACK OFF AUTO SELECT ON

8
8-1 8-2
25WF30
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1
2 RF-AGC
TAKE OVER POINT ADJUSTMENT (I2C BUS CONTROL)
1. Receive the PAL Colour bar signal.
Signal Strength: 54 ± 1 dbµV (75Ωopen)
2. Connect the oscilloscope to TP201 (Tuner’s
AGC Terminal) 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 ~ 1.0 V below maximum voltage.
4. Change the antenna input signal to 63 ~
67 dBµV, 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 50Ω signal strength gauge, when not using 50/75 impedance adapter, signal strength is 52 ± 1 dBµV (75Ω open), instead of 54 ± 1 dBµV (75Ωopen).
Precaution:
The loss of using impedance adapter.
Tuner IFT (PRESET) TU200
1. Get the tuner ready to receive the CH. E-10
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. Connecttheresponselead(use LOW IMPED-
ANCE probe with wave detector ; see Fig.1)
tothetuner’s IFoutputterminal.(Thisterminal 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.
SERVICE ADJUSTMENT
PIF ADJUSTMENT CHECKING
3 PIF VCO COIL
ADJUSTMENT 1. Do not receive any signal.
2. Connectthedigitalvoltmeter toTP803(pin (54)
of IC800) in the main unit.
3. Callthe"PIF VCO" Mode at the service mode. 4. Verify that it is turned counterclockwise to 0V
andadjustT800 to make DC voltage ofTP803 become 2.5 ± 0.1 V in the range.
DC voltage at TP803 AdjustT800toBpoint,betweenB' and B". * Turn thecoilcounterclockwisefor
theupdirection andclockwisefor the down direction.
Fig. 1 Fig. 2
E-9 CH
P C
-1.5+/-0.8dB
10k
100k
1n60
75ohm
IF OUT
1000p
Oscilloscope
Fig. 3
Oscilloscope
BIAS Box
TV SET
Bias Box :about 4.5V
TP201
0.1V
+ – +
–
5V 2.5V Down BB"CUPB’A
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
Note:Thesettingbelow isautomati- cally set when the SUB-VOL is selected in the service mode. * SURROUND OFF * AV MODE (STANDARD) * S-NORMAL state * S-VOL Max * Bass + OFF
SOUND ADJUSTMENT
1 SUB VOL
(BUS ADJUST- MENT)
1. Receive PAL Colour Bar signal.
Signal content: 400 Hz 100% Mod.
2. Connecttheprobelofthemeter(*) to (SI) con-
nector.
3. Select the SUB-VOL in the service mode. 4. Adjust the SUB-VOL data to make the meter
indicate 5.2 Vrms (at L-CH) Adjustment value: 5.0± 0.3 Vrms
2 NOISE MUTE
CHECKING 1. Receive the PAL Colour Bar signal.
2. Turnup the volumecontroltomaximum,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.
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1 PURITY
ADJUSTMENT 1. Select the green monocolour screen with re-
mote controller, and set the beam current of 1,400µA with the contrast control.
2. Degauss the CRTenough with the degausing
coil. For the adjustable magnetic field.
Vertical Bv: 0.1G Horizontal Bh: 0.1G
3. Maintain the purity magnet at the zero mag-
netic field and keep the static convergence roughly adjusted. With P-MG, adjust it to the center - rankA.
4. Observe the points a, b, as shown in Fig.4-1
throughthemicroscope.MoveDYforeandaft to set the landing at the point (rank A).
5. If the a/b balance is poor, compensate it to the
center "Rank AB).
6. Align it to zero, keeping the raster rotation in
the east direction.
7. Tighten the defrection coil fastening screw.
Tightening torqu: 180N ± 20N (11kgf ± 2kgf)
8. CheckingtheCRTcornerarea,bondthemag-
netic sheet to set the landing at Rank A for compensation. Note:This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 1400 ± 50 µA. Note:Select the service mode, and press the monocolour key of R/C for process,and the monocolour screen (green) will be selected. Everypushofthemonocolorkeychangesthe screen as follows.
PURITY ADJUSTMENT
* Press R/C RGB key for 1 sec-
ondinNORMALMODE,thecol- our will change to RGB mono colour mode.
Fig. 4-1
Fig. 4-2 Rank A (On the right of CRT)
Fig. 4-3 Rank A (On the left of CRT)
a
AA=B
B
AA=B
B
b
90 mm 90 mm
GREEN
ONLY BLUE
ONLY
Single-colour
screen cleared
RED
ONLY
* Adjustment for uniformity is
changed to another content. Please refer to the following page.

9
9-1 9-2
25WF30
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1CONVER-
GENCE ADJUSTMENT (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 point "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. FixallthewedgesontheCRTandapplyglass
tape over them.
3. Applylacquertothe deflectionyokelockscrew,
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.
CONVERGENT ADJUSTMENT
Fig. 5-1
Fig. 5-2
Fig. 5-3
Fig. 5-4 Fig. 5-5 Fig. 5-6
R G B
R G B
CRT Neck
Lacquer
Purity Magnet 4-Pole Magnet
6-Pole Magnet.
26 ±0.5mm
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
UNIFORMITY ADJUSTMENT
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
Before adjustment begin, Horizontal magnetic field = Vertical magnetic field = 0.1G Make sure degauss it. (North direction Red uniformity) 1. Horizontalmf=Settomonocolourscreen Red
and adjust to + 0.25G.
2. Pay attention to the edge of CRT, if the land-
ing is poor, adjust by attaching the compen- sation magnet at the back of the CRT. (Refer to figure.)
(South direction Red uniformity) 1. Horizontalmf=Settomonocolourscreen Red
and adjust to - 0.25G.
2. Pay attention to the edge of CRT, if the land-
ing is poor, adjust by attaching the compen- sation magnet at the back of the CRT.
(The same mothod is aplied for adjustment of
monocolour screen Blue for blue uniformity, andchangingboththemagneticfield for North and South direction.)
* During the pasting of compensation magnet,
use the crosshatch pattern. Make sure there is no blur or bend lines oc- cur. If the blur or bend lines are serious, adjust thelocationofcompensationmagnettomake it better.
1 Uniformity
adjustment (To perform after the purity and conver- gence adjustment.)
(CRT surface) (CRT back)
Miss landing
Compensation magnet

10
10-1 10-2
25WF30
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1
2WHITE
BALANCE BACK- GROUND (CUT OFF BKGD) I2C
BUS ADJUST- MENT (AV SIGNAL)
1. Receive E-5CH "Monoscope Pattern" signal. 2. Select P-NORM with the remote controller. 3. ConnectthebeamammeterbetweenTP1601
and TP1602.
4. Coarsely adjust the beam current to approx.
1.6mA with R1759 (Sub-Contrast VR)
5. Receive the window pattern withAV input.
(PAL burst is generated with the signal gen- erator.)
6. With the data of G-drive and B-drive, adjust
the color temperature 12,300°K of the white peak to white.
7. Adjust the right dark area of the window to
12,300°K with R-cut off, G-cut off and B-cut off.
8. Read just the color temperature at the white
peak.
9. Check 12,300°K at the low white. Note1 : Apply this adjustment after aging with
the beam current 1,400±50µA or more for 30 minormore.(Onthewhiteorgreenminocolor screen)
Note:Data up/Down is possible
as below.
R CUT OFFUP "1" KEY
DOWN "4" KEY
G CUT OFFUP "2" KEY
DOWN "5" KEY
B CUT OFF UP "3" KEY
DOWN "6" KEY
G-DRIVE UP "7" KEY
DOWN " "KEY
B-DRIVE UP "8" KEY
DOWN "0" KEY
* 12,300°K X : 0.272 ± 0.005
Y : 0.275 ± 0.005
(WithMonoltacolourthermometer CA-100) * Thecolourtemperatureisbased
on the shipment initial setting ta- ble.
CRT CUTOFF (CUTOFF BKGD) SERVICE MODE I2C BUS
DATA ADJUSTMENT
1. Receive E-5CH "Monoscope Pattern" signal. 2. Select P-NORM with the remote controller. 3. Turnon the service switch,andselecttheCUT
OFF BKGD mode at the service mode.
4. Select the screen VR 0/10. 5. Press "-/--" key of the remote controller to se-
lect the horizontal centering mode.
6. Turn the scteen VR clockwise, and adjust the
first lighting horizontal centering rasterslighly light.
7. Adjust the CUT OFF data of two other colors,
and coarsely adjust the horizontal centering to become white. (Note 1)
8. Turn the screen VR in the opposite direction
to the point where the horizontal centering raster goes out.
Note 1: Apply the adjustment after aging with
the beam current 1,600±50µA or more for 30 min or more.
9. Press "-/--" key of the remote controller to se-
lect the normal mode.
CUT OFF, BKGD ADJUSTMENT
* Befor doing adjustment, make sure
the R/G/B-cut and the B/G-Drive is at initial value.
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1MAX BEAM
R1759 1. Receive E-5CH "Monoscope pattern" with
standard mode.
2. Make the pictur normal with the remote
controller.(AV MODE: DYNAMIC)
3. ConnectthebeamammeterbetweenTP1601
& TP1602. Ammeter full scale-3mA range TP1602 is connected at the - side of the am- meter. TP1601 is connected at the + side of the am- meter.
4. Adjustthebeamcurrentto1.6mA±20µAwith
R1759 (sub-contrast VR).
Note : Apply the adjustment after aging with the
beam current 1,400±50µA or more for 30 min or more.
(On the white or green monocolor screen)
SUB-CONT ADJUSTMENT
3WHITE
BALANCE BACK- GROUND (CUT OFF DVD BKGD) I2C BUS
ADJUSTMENT (DVD SIGNAL)
1. Thewindowpattern is received with DVD sig-
nal (component signal).
2. Apply the adjustment in the same manner as
item 5 of adjustment 2 and the subsequence above. (17,000°K ) (G-DRIVE, B-DRIVE, R- CUT OFF, G-CUT OFF, B-CUT OFF) Apply the adjustment after the end of adjust- ment 2.
Note2:
Use the window pattern of the signal generator SX1006 for adjustment.(PAL, colour burst is generated with signal genera- tor.)
2 SUB-
CONTRAST (SUB-CONT) I2C BUS
ADJUSTMENT (AV SIGNAL)
1. Receive the window pattern withAV input. 2. Make the picture normal with the remote
controller.(AV MODE: DYNAMIC)
3. Select the SUB-CONTRAST adjustment
mode with the remote controller, and adjust 50% white to 165 ± 10cd.
Note 3:
Use"Y"ofMinoltacolor analyzer CA-100 in adjustment.
Note 4:
Use the PAL window pattern of the signal generator for adjust- ment. (PALand colour burst are provided.)
Note 5:Window Pattern
3SUB-
CONTRAST (SUB-CONT DVD) I2C BUS
ADJUSTMENT (DVD SIGNAL)
1. Select the DVD mode. 2. Receive the signal of the DVD signal genera-
tor. (Component signal) (Window pattern)
3. Make the picture normal with the remote
controller.(AV MODE: DYNAMIC)
4. Select the SUB-CONTRAST adjustment
mode (DVD) with the remote controller, and adjust 50% white to 165 ± 10 cd.
4SUB-
BRIGHTNESS (SUB-BRI) I2C
BUS CON- TROL (AV SIGNAL)
1. Receive the window pattern withAV input. 2. Make the picture normal with the remote
controller.(AV MODE: DYNAMIC)
3. Select the SUB-BRIGHT adjustment mode
withtheremotecontroller, and adjust the right dark white area of the window pattern to 5.5 ± 0.5 cd.
* When E-2 CH (Crosshatch pat-
tern) or equivalent signal is re- ceived.
1.Maketheimage normal with the
remote controller.
2.Adjust the 3rd (1 thru 5 from the
left) black of the window pattern to sink.
5SUB-
BRIGHTNESS (SUB-BRI DVD) I2C BUS
CONTROL (DVD SIGNAL)
1. Select the DVD mode. 2. Receive the signal of the DVD signal genera-
tor. (Component signal) (Window pattern)
3. Make the picture normal with the remote
controller.(AV MODE: DYNAMIC)
4. Select the SUB-BRIGHT adjustment mode
(DVD) with the remote controller, and adjust the right dark white area of the window pat- tern to 5.5 ± 0.5 cd of window pattern.
CUT OFF POINT
50% white for SUB-CONT
Dark white for SUB-BRIGHT

11
11-1 11-2
25WF30
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1
HORIZONTAL, VERTICAL, DEFLECTION LOOP AND ADJUSTMENT
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1 SUB COLOUR
(I2C BUS
CONTROL)
1. Receive the PAL Colour Bar signal. 2. Make the image normal with the remote con-
troller.
3. Connect the oscilloscope to pin (4) of TP802
(ky). (Use Probe10:1) Range : 2V/Div Sweep time : 20µ sec/Div
4. Set the sub colour adjustment mode with the
remotecontrolller, and varythesubcolour data to make 75% W of the colour bar and RED at thesamelevel for adjustment shown in Fig. 7.
PAL CHROMA ADJUSTMENT
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1SUB-TINT
(I2C BUS
CONTROL)
1. Selectthesub-tintadjustmentmode(automatic
Y cut) to receive NTSC colour bar signal.
2. Connect the oscilloscope to TP801.
Range : 20mV/Div (AC)
(Use Probe 10:1)
Sweep time : 20µ sec/Div
3. Vary the sub tint data to adjust the waveform
to be gained as shown in Fig 8. TP801………………(KY) 6 pin
NTSC CHROMA ADJUSTMENT
MAIN SCREEN ADJUSTMENT
V-AMP 50 Adjust the overscan to 8.5%.(Monoscope)(E-5) V-LINE 50 Adjust the linearity to the best. (E-5) V S-CORR 50 Already preset. (Adjust this unless the linearity
is achieved.) (E-2)
V-CENT 50 Align the center of the screen to the geometric
center of CRT. (E-5)
H-CENT 50 Align the center of the screen to the geometric
center of CRT. (E-5)
H-SIZE 50 Adjust the overscan to 8.5% ± 0.5%. (E-5) E/W-PAR 50 Adjust the 2nd vertical line from the left end of
crosshatch pattern so that the midddle 4 blocks are straight.(E-2) (Refer to Fig.6-1)
E/W-COR 50 Adjust the 2nd vertical line from the left end of
crosshatchpatternsothatthe top are straight.(E- 2) (Refer to Fig.6-2)
TRAPE 50 Adjust the 2nd vertical line from the left end of
crosshatch pattern so that the D1 (center area of the first vertical line-edge of screen) and D2 (top area of the first vertical line-edge of the screen) are same. (E-2) (Refer to Fig.6-3)
V-ENT Already preset. H-ENT Already preset. OTHER Ontheitemsof V-AMP60,V-LINE60,VS-CORR
60, V-CENT 60, H-CENT 60, H-SIZE 60, E/W- PAR 60, E/W-COR 60 and TRAPE 60, the compensation data is automatically input if the 50Hz mode adjusutment is done. Donotchange50Hz mode data afteradjust60Hz mode data.Because 60Hz mode data follow 50Hz mode data automatically.
I2C BUS AD-
JUSTMENT
The receiving channel in ( ) are following signals. (E-2):Crosshatch(50Hz) (E-5):Monoscope(50Hz)
Fig. 6-1 Fig. 6-3
However, if it is largely deviated when it is checked in 60Hz mode, readjust it in the 60Hz mode.
Fig. 7
Fig. 8
Cy G B
75% W YMgR100% W
Fig. 6-2
A=B=C
(B-Y)
W Y Cy G Mg R B
A B C
D2 D1

12
12-1 12-2
25WF30
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
1
2 COLOUR Key 1.Receive "Color Bar" signal.
2.Press to MENU mode, then Select Picture
Mode and set 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. Press to MENU mode, then Select Picture
Mode and set to select CONTRAST.
3. PressVolume Up/Down key to check whether
the CONTRAST effect is OK or not.
FUNCTION OPERATION CHECKING (1) (VIDEO & AUDIO)
3 BRIGHTNESS 1.Receive "Monoscope Pattern" signal.
2.Press to MENU mode, then Select Picture
Mode and set 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.Press to MENU mode, then Select Picture
Mode and set to selectTINT.
3.Press Volume Up/Down key to check TINT,
UP for GREEN direction and DOWN for RED direction whether is OK or not.
5 SHARPNESS
Key 1.Receive "Monoscope Pattern" signal.
2.Press to MENU mode, then Select Picture
Mode and set to select SHARPNESS.
3.Press Volume Up/Down key to check whether
the SHARPNESS effect is OK or not.
6 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, refer to page 7-2.)
Notes:
Ifnothingisdisplaymeancontrast, colour, bright, tint, sharpness are all in normal setting.
7 WHITE TEMP 1. Receive the Monoscope Pattern signal.
2. Set FUNCTION to select WHITE TEMP. 3. Press Volume Up/Down key to check WHITE
TEMP Option, STANDARD: NORMAL SET- TING, WARM for more REDDISH direction changing, COOL for more BLUISH direction changing.
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
FUNCTION OPERATION CHECKING (2) (VIDEO & AUDIO)
9 HEADPHONE
OUTPUT CHECKING
1. Receive the PAL Colour Bar signal with sound
400 Hz, 100% modulation (± 50 kHz Dev)
2. Maximum volume, and check the headphone
output with 400 kHz sound and no sound out from speaker.
8COLOUR
SYSTEM 1.Receive the "PAL COLOUR BAR" signal thru
AV, press the COLOUR SYSTEM key to se- lect modes except PAL, check the COLOUR isnotworking properly. Then, select the "PAL" mode.Checkagainitscoloursothatitiswork- ing properly.
2.Receive “NTSC 3.58” signal thru AV, press
COLOUR SYSTEM key to select modes ex- cept NTSC3.58, check the COLOUR is not workingproperly.Then,selectthe“NTSC 3.58” mode.Checkagainitscoloursothatitiswork- ing properly.
3.Receive “NTSC 4.43 COLOUR BAR” signal
thru AV, press COLOUR SYSTEM key to se- lectmodesexceptN4.43,checktheCOLOUR isnotworkingproperly.Then,selectthe“NTSC 4.43” mode. Check again its colour so that it is working properly.
SUB-VOLADJ H/P Output (Open)
63 1.0Vp-p 40 500mVp-p
No.
Adjustment point
Adjustment Condition / Procedure Waveform or others
PROTECTOR OPERATION CHECKING
2OTHER
PROTECTOR * Correspondence for short circuit of smooth-
ing electrolysis of +B line and so on. To check the operation of the protector and so on, take care for the breakage, deteriora- tion and so on of each element.
1H, V PROTEC-
TOR 1.Receive E-5CH "Monoscope Pattern" signal.
2.Connect the Bias Box to D1621 cathode
(R1620 side).
3.Set voltage of Bias Box to 15V and make sure
the protector is not work.
4.Set voltageofBiasBoxto24V, and make sure
the protector is work.
Reference Approx.17.7Vas ordinary.

13
13-1 13-2
25WF30
TROUBLE SHOOTING TABLE
Check the voltage at pin (6) of IC1501.
NOVERTICAL SCAN
Check IC1501 and related circuits.
Normal Abnormal Normal
Check IC800 and its peripheral parts.
Check vertical trigger pulse at pin (26) of IC800. Check D1576 and R1576.
Abnormal
Does D1200 (Power LED) turn on?
D1200 (Power LED) turn on and off.
NO RASTER
Normal
Check CRT connector (KY), (H) bias. Is pin (10) of IC700 in "L" level ?
Abnormal
Check IC850.
Check protecter circuit and its related parts pin (2) of IC1000 vertical pulse.
Check the power circuit consisting of IC700, Q700 IC750 and IC602.
Yes
Yes (RED)
Yes
(Bus error)
No
See many often D1200 flashes in red. This indicates which IC to check up.
No
A
Does horizontal circuit momentary oscillate?
Check R1651, IC800 and their peripheral parts.
TROUBLE SHOOTING TABLE (Continued)

14
14-1 14-2
25WF30
TROUBLE SHOOTING TABLE (Continued)
Check the peripheral circuit of IC1700, IC1002, IC1701 and D1751.
Check the power circuit consisting of T700, IC700, Q700 and peripheral parts.
Normal
Check F3700.
Replace the Fuse.
Is the Fuse again blown out?
Does 5V appear at pin (22) of IC1000?
Blown out
No
No Yes
Yes
Check IC1000, IC1002, Q1002, Q752 and Q753.
Check F3700.
NO LED LIGHT
E
2
PROM
(IC1001) V/C/D (IC800) PLL (Tuner) S-CONTROL (IC300)
AV-SWITCH (IC400)
OTHER
500 500 2000 (ms)
2000 (ms)500 500
2000 (ms)500 500
2000 (ms)500 500
2000 (ms)500 500
2000 (ms)500 500
Bus-Err
Bus-Err Bus-Err Bus-Err Bus-Err Bus-Err
A
TROUBLE SHOOTING TABLE (Continued)

15
15-1 15-2
25WF30
TROUBLE SHOOTING TABLE (Continued) TROUBLE SHOOTING TABLE (Continued)
Check TU200, TP201 and etc.
NO PICTURE
Does the snow noise appear on the picture tube at max contrast and brightness control?
B
Snow noise increase.
Does 5V appear at pins (6) and (7) of TU200 (TUNER)? Check IC600, L200, TU200
and etc.
No
Does 31V appear at pin (9) of TU200? Check IC1751, L201 and etc.
Yes
Yes
No
Yes
No
Normal
No snow noise.
Check pins (6) and (7) of IC800.
Abnormal
B
Noise or signal appear.
Is AV1, AV2 or AV3 input normal? Check Q455 and its
peripheral circuit.
Check TU200, SF200 and their related parts.
Yes
No
Which does pin (43) of IC400 appear, noise or signal? Which does pin (39) of IC800 appear, noise or signal?
Check IC400 and its peripheral circuit.
Noise
Signal
Check IC400, Q401 and their peripheral circuit.
Is IC800 RGB out Normal?
Check IC800 and its peripheral circuit.
Check the peripheral circuits of screen heater (FBT) and the CRT.
Check IC850 and its peripheral circuit.
Signal
Are waveform at pins (7), (8) and (9) of IC850 normal?
Yes
Noise No Yes No

16
16-1 16-2
25WF30
TROUBLE SHOOTING TABLE (Continued) TROUBLE SHOOTING TABLE (Continued)
No Yes
YesNo
Is there audio signal at pins (46) and (48) of IC400?
Check IC400 and its peripheral circuit.
Check TU200 and its peripheral parts. Check NICAM unit and its peripheral circuit.
Check TU200 and its peripheral circuits of no problem, set the sound system inpositon.
NO NORMAL SOUND
Is audio output terminal J400 normal ?
Yes
YesNo
No
Check TV sound. Is there audio signal at pins (3) and (22)
of IC300?
Change the sound system. Is sound normal? Check IC400
and its peripheral parts.
Is there audio signal at pins (2) and (5) of IC1300?
No
No
Yes
Check IC300.
Yes
Check IC1300 and its peripheral parts.
Set S-Volume at maximum. Do pins (12), (15) of IC300 work?
Check IC301 and its peripheral circuit.
NoYes
Yes Yes
No
Turn on colour control. Does colour appear?
NO SPECIFIC COLOUR
C
Is only RF signal’s colour abnormal?
Set the colour control.
Turn on colour system forced switch. Does colour appear?
Fix cotrol to coloured system.
Check TU200, Q455, IC400 and their peripherals.
Yes
Yes
Yes
No
No
Is chroma input level at pin (43) of IC800 proper?
Check Q400 and its peripheral circuit.
Check D1664 and its peripheral circuit.
Are signal waveforms at TP801 and TP802 proper?
Is SCP signal waveform at pin (30) of IC800 proper?
No
NO COLOUR
Check IC850.
Check IC800 and its peripheral circuit.
No
PAL, SECAM, NTSC4.43: Check X800, pin (12) of IC800 and their peripheral circuit.

17
17-1 17-2
25WF30
TROUBLE SHOOTING TABLE (Continued)
SET Sub- colour.
Check IC800 and its peripherals.
C
COLOUR PRODUCED
Colour in B/W mode. Colour control circuit detective.
Colour saturation control does not work. Fix control to coloured system.
Turn colour control to minimum. Does colour disappear?
Turn up and down colour control. Does colour gain go up and down?
Can the sub-colour be readjusted in service mode?
Turn on colour system forced switch. Does colour appear?
APG circuit: Check IC800 and its peripherals.
Yes Yes
White balance: Check RGB output circuit of IC800.
Check IC800.
No
Yes No
Check D1664 and its peripherals.
PAL, SECAM, NTSC4.43: Check X800, pin (12) of IC800 and their peripherals.
No
No
Is chroma input level at pin (43) of IC800 proper? Ref. value: 100 ~ 500mVp-p.
Yes
Fix control to coloured system.
No
Is SCP signal waveform at pin (30) of IC800 proper?
Are signal waveforms at TP801 and TP802 proper?
Yes
Yes
Check Q400 and its peripherals.
No
NoYes
Check IC800.

654321
A
B
C
D
E
F
G
H
18
25WF30
CHASSIS LAYOUT

654321
A
B
C
D
E
F
G
H
19
25WF30
BLOCK DIAGRAM-1

21
25WF30
20
25WF30
87109654321
A
B
C
D
E
F
G
H
1716 19181514131211
BLOCK DIAGRAM-2