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.
21F-PA18
21F-PA18(B)
21F-PD250
21F-PD250
21F-PT220
FEATURES
PAL-B/G, D/K
Frequency Synthesizer Tuner
Full Auto System
100-CH Program Memory
CATV (Hyper Band Ready)
Hotel Mode
White Temperature Select
Off Timer
Blue Back Function
Aperture Control Circuit
Auto Fine Tuning
NTSC Colour Comb Filter
High Contrast Picture ( Black Stretch Circuit)
Child Lock
Multi Languages OSD (English/Thai)
Rear AV IN / OUT Terminals
Front AV-IN Terminal (Model 21F-PT220)
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing
this chassis. To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.
SHARP MANUFACTURING (THAILAND) CO.,LTD.
Page 2
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
CHAPTER 1. SPECIFICATIONS
[1] SPECIFICATIONS
Convergence ................................................................................................................ Self Convergence System
Focus
Sweep Deflection ..................................................................................................................................... Magnetic
Intermediate Frequencies
Power Input ..................................................................................................................... 110 ~ 240V AC 50/60 Hz
Picture IF Carrier ................................................................................................................................. 38.9MHz
Cabinet material ..................................................................................................................................... All Plastics
Width: 577 mm
Height: 465.5 mm
Depth: 480 mm
Specifications are subject to change without prior notice
1 – 1
Page 3
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
TVE
CHAPTER 2. IMPORTANT SERVICE NOTES
[1] IMPORTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by qualified service personnel only.
1. SERVICE OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE
When servicing the high voltage system, remove static charge from it by connecting a 10K ohm resistor in series with an insulated wire (such as a test
probe) between picture tube dag and 2nd anode lead. (AC line cord should be disconnected from AC outlet.)
1) Picture tube in this receiver employs integral implosion protection.
2) Replace with the same type number of picture tube 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.
2. 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, please make sure do not increase the high voltage of the set to more than 30.0kV (at beam 0µA).
2) To keep the set in a normal operation, please make sure it’s function at 26.5kV ± 1.0kV (at beam 1,100µA). 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 unauthorizerd types and/or brands which may cause excessive X-ray radiation.
3. 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-metal control knobs, insulating materials, cabinet backs, adjustment and compartment covers or
shields, isolation resistor-capacity networks, mechanical insulators etc.
2 – 1
Page 4
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
(6)
e
CHAPTER 3.
ADJUSTMENT PRECAUTIONS
[1] ADJUSTMENT PRECAUTIONS
ADJUSTMENT PRECAUTIONS
This model's setting are adjusted in two different ways: through the I2C bus control and in
the conventional analog manner. The adjustments via the I2C bus control include preset-only
items and variable data.
CAUTION : MAKE SURE TV SET IN "NORMAL CONDITION" BEFORE SWITCH TO SERVICE MODE
FOR ADJUSTMENT.
1.Setting the service mode by the microprocessor.
(1) Press SERVICE key on the remote controller to set the TV set to SERVICE mode position,
and the microprocessor is in input mode. (Adjustment through the I2C bus control).
Service Mode also can be reached by by connecting MCU Pin 5 to ground.
(JA483 connect to JA484)
(2) Press the MENU key on the remote controller to get ready to select the mode
(Adjustment mode, Setting mode, Check mode and Option mode) one by one.
(3) Press the CH DOWN / UP key on the remote controller to select the item in Adjustment
mode, Setting mode or Option mode.
(4) Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.
Please wait approximately 200 msec for data storage in EEPROM before select to
another mode.
(5) In Check mode the data cannot be changed.
Press the SERVICE keyagain,it will switch to the NORMAL modeposition,and th
microprocessor is out of the SERVICE mode.
2.Factory Presetting.
(1) During POWER OFF (AC OFF), switch on service key (by connecting MCU Pin 5 to ground )
then follow by AC ON. Initial values are automatically preset only when a new EEPROM is used.
(Judge with the first 4 bytes ).
(2) The initial data are preset as listed in page 3-6 to 3-11.
(3) Make sure the data need modification or not (Initial data).
Precaution: If haven't done this initialization, it may possibly generate excessive Beam current.
3.
For reference please check with memory map RH-IXC129WJZZQ. (See Page 4-1 ~ 4-32).
3 – 1
Page 5
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
1. ADJUSTMENT ITEM
***Below are the adjustment items that should be done, PLS FOLLOW THE PROCEDURE. Otherwise some adjustment items will
not be accurate.
NO ***ADJUSTMENT ITEMEFFECTIVE MODELREVISION
1BUS SET UP
2OPTION SET UP
3H-VCO
4VIF-VCO
5S-TRAP fo
6RF-AGC
7PURITY ADJ
8CONVERGENCE ADJ
9FOCUS ADJ
10V-SHIFT (50 Hz)
11H-SHIFT (50 Hz)
12V-SIZE (50 Hz)
13SCREEN
14WHITE BALANCE
15SUB-BRIGHTNESS
16SUB-CONTRAST
17SUB-COLOR
18SUB-TINT
19BEAM CURRENT CHECK
20BEAM PROTECTOR CHECK
21HV PROTECTOR CHECK
22OTHER PROTECTOR CHECK
23AV OUT CHECK
24AV IN CHECK
25CONTRAST CONTROL CHECK
26COLOR CONTROL CHECK
27BRIGHTNESS CONTROL CHECK
28TINT CONTROL CHECK
29SHARPNESS CONTROL CHECK
30CH DISPLAY COLOR CHECK
31NORMAL DISPLAY CHECK
32WHITE TEMP CONTROL CHECK
33COLOR SYSTEM CHECK
34SOUND SYSTEM CHECK
35NOISE MUTE CHECK
36OSD LANGUAGE QUANTITY CHECK
37SHOCK TEST CHECK
ALL MODELS
3 – 2
Page 6
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
2. USER DATA IN SERVICE MODE
1) 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.
2) In the service mode, the user data establish as below,
USER DATA
CONTRASTMAX (60)
COLOUR CENT (0)
BRIGHTNESSCENT (0)
TINTCENT (0)
SHARPNESS CENT (0)
WHITE TEMPSTANDARD
S-VOLUMEMIN
BLUE BACK OFF
C SYSTEMAUTO
S SYSTEM *1
*1: For each CH, data is same as before switch to Service mode.
The flow of Mode list as following,
* Direct Key-in Mode for Service Items in Service Mode
RC CODE (HEX)R/C KEY NAMESERVICE-ITEM
80POS 1R-C UP (IN SERVICE MODE V00)
40POS 2G-C UP (IN SERVICE MODE V00)
C0POS 3B-C UP (IN SERVICE MODE V00)
20POS 4R-C DOWN (IN SERVICE MODE V00)
A0POS 5G-C DOWN (IN SERVICE MODE V00)
60POS 6B-C DOWN (IN SERVICE MODE V00)
E0POS 7R-D UP (IN SERVICE MODE V00)
10POS 8B-D UP (IN SERVICE MODE V00)
50POS 0B-D DOWN (IN SERVICE MODE V00)
E4FLASHBACKR-D DOWN (IN SERVICE MODE V00)
E4FLASHBACKY-MUTE (BESIDES OF SERVICE MODE V00)
75WHITE TEMP UPRF-AGC (V01)
F5WHITE TEMP DOWNVIF-VC0 (V02)
C2TUNE DOWNH-VCO (V03)
8DSHARPNESS DOWNSUB-CON (V04)
D6BALANCE LEFTSUB-COL (V05)
0DSHARPNESS UPSUB-BRIGHT (V06)
36BALANCE RIGHTSUB-TINT (V07)
46TREBLE UPSUB-SHP (V08)
C6TREBLE DOWNSUB-COL-YUV (V09)
26BASS UPSUB-TINT-YUV (V10)
24COLOUR UPV-SIZE (V11), V-SIZE60 (V17)
54BRIGHTNESS DOWNV-SHIFT (V12), V-SHIFT60 (V18)
74TINT DOWNH-SHIFT (V13), H-SHIFT60 (V19)
66SURROUND UPSCM-BR (V14)
E6SURROUND DOWNSCM-BB (V15)
C4CONTRAST DOWNSUB-VOL (V16)
*NOTE: PLL DATA OF ABOVE FREQ SHOULD TAKE THE ACCOUNT OF PIF SETTING IN SERVICE
OPTION O04 (VIF) BEFORE STORING INTO EEPROM
3 – 4
Page 8
SHIPPING SETTING & CHECKING
(1) The following default data has been factory-set for the E2PROM follow by INITIAL DATA selected.
ITEMSDATA SETTING MODEL
LAST POWERON
LAST TV/AV MODETV MODE
LAST POSITIONCH 1
FLASHBACK CHANNELCH 1
1/2 DIGITENTR 2 DIGIT ENTRY
VOLUME0 (Min)
BLUE BACKOFF
CHILD LOCKOFF
OFF TIMER--:-PASSWORD0000
AFTALL CH ON
COLOR SYSTEMALL CH AUTO
SOUND SYSTEM B/G
SKIPALL CH OFF
CONTRAST60
COLOR+6
BRIGHTNESS0
TINT0(CENTER)
SHARPNESS+6
WHITE TEMP0
**This magnetic filed is in ITC CRT specification.
3 – 5
Page 9
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
(
)
**AFTER INITIALIZED THE EEPROM (REFER TO FACTORY PRESETTING), READ DATA FROM
EEPROM ADDRESS 00H ~ 03H,AND COMPARE TO THE LIST BELOW, IF DIFFERENT,
INITIALIZE THE EEPROM.
ADDRESSDATAADDRESSDATA
00H:
01H:
7CH
70H
02H:
03H:
78H
70H
*** There are four stages of service mode data. First stage data from V00~V32 (Adjustment Mode).
To go into second stage of service mode data, press MENU key.Second stage data from F01~F185(Setting Mode).
To go into third stage of service mode data, press MENU key.Third stage data is Check Mode.
To go into fourth stage of service mode data, press MENU key.Fourth stage data from O01~O37(Option Mode).
To go into fifth stage of service mode data, press MENU key.Fifth stage data is NVM Edit Mode.
SHARPNESS OV OFFSET -AV
SHARPNESS OV OFFSET - YUV
SHARPNESS OV OFFSET -PAL
SHARPNESS OV OFFSET SECAM
SHARPNESS OV OFFSET-N443
SHARPNESS OV OFFSET -N358
TEMP IS RED
TEMP IS RED
TEMP IS BLUE
TEMP IS BLUE
CENTER VALUE OF CHROMA
TRAP
CENTER VALUE OF CHROMA
TRAP PAL
CENTER VALUE OF CHROMA
TRAP SECAM
CENTER VALUE OF CHROMA
TRAP N443
CENTER VALUE OF CHROMA
TRAP N358
MEL6S-BOOSTER LEVEL6
S-ST-POINTS-BOOSTER START POINT
S-SP-POINTS-BOOSTER STOP POINT
S-STEPS-BOOSTER STEP
POW-STORAGECONTRAST/BRIGHTNESS
S-B-BASSS-BOOSTER BASS LIMITER
S-B-TREBS-BOOSTER TREBLE LIMITER
S-BASSS-BOOSTER BASS LIMITER
S-TREBS-BOOSTER TREBLE LIMITER
V-STD-TV
V-STD-AV
V-STD-YUV
HVCO-FREERUN-SHIFTHVCO-FREERUN-SHIFT
HVCO-PULLDOWNHVCO PULLDOW N
HVCO-PULLUPHVCO PULLUP
HVCO-PULLIN-UPHVCO PULLIN UP
PEAK-ACLPEAK ACL
APER-FREQAPER FREQ
R-DRI YUV OFFSET
B-DRI YUV OFFSET
R-CUT YUV OFFSET
G-CUT YUV OFFSET
B-CUT YUV OFFSET
CON YUV OFFSET
BRT YUV OFFSET
SHP ANT-ONII OFFSET
WAIT MD TIME
Contrast OFFSET
Bright OFFSET
CR-PEDESTEL-ADJ
CB-PEDESTEL-ADJ
SIF-PALSOUND S/N SWITCH FOR PAL
AV2 BRIGHTNESS OFFSET
BASS OFFSET
TREBLE OFFSET
AS-SPEED-DN
AS-SPEED-UP
SIF-BPF-WIDE
SIF-BPF-WIDE-574
ACC-AMP-ON
TEST PATTERN
FSC-FREEFSC-FREE
MCUVOUTMCUVOUT
HALF-H KILLERHALF-H KILLER
V-AGCV-AGC
CONT NEWS
CONT MUSIC
CONT MOVIE
BRIGHT NEWS
BRIGHT MUSIC
CHARACTERISTIC CONTROL
INCREASE GRADUALLY
(WHEN S-BOOSTER ON)
(WHEN S-BOOSTER ON)
(WHEN S-BOOSTER OFF)
(WHEN S-BOOSTER OFF)
VERTICAL STANDARD SIGNAL
DETECTOR SWITCH
VERTICAL STANDARD SIGNAL
DETECTOR SWITCH
VERTICAL STANDARD SIGNAL
DETECTOR SWITCH
RGB OUTPUT RED GAIN OFFSET
(YUV)
RGB OUTPUT BLUE GAIN
OFFSET (YUV)
RGB OUTPUT-RED BIAS LEVEL
OFFSET (YUV)
RGB OUTPUT-GREEN BIAS
LEVEL OFFSET (YUV)
RGB OUTPUT-BLUE BIAS LEVEL
OFFSET (YUV)
SUB-CONTRAS OFFSET (YUV)
SUB-BRIGHT OFFSET (YUV)
SHARP ANT-ON II OFFSET FOR
VIDEO TONE
SETTING CYCLE PROCESS TIME
AT LOW POWER
CONTRAST (PICTURE LEVEL)
OFFSET
PICTURE BLACK LEVEL
(BRIGHT) OFFSET
Cr SIGNAL LEVEL ADJUSTMENT
Cb SIGNAL LEVEL ADJUSTMENT
AV2 BRIGHT OFFSET
BASS OFFSET
TREBLE OFFSET
AUTO SLICE SPEED SWITCH
(DOWN)
AUTO SLICE SPEED SWITCH
SIF BPF BANDWIDTH SELECTOR
SIF BPF BANDWIDTH SELECTOR
INCREASE CHROMA ACC AMP
GAIN
TEST PATTERN
CONTRAST SETTING- NEWS
CONTRAST SETTING- MUSIC
CONTRAST SETTING- MOVIE
BRIGHTNESS SETTING- NEWS
BRIGHTNESS SETTING- MUSIC
YUV
F93
F94
F95
F96
F97
F98
F99
F100
F101
F102
F103
F104
F105
F106
F107
F108
F109
F110
F111
F112
F113
F114
F115
F116
F117
F118
F119
F120
F121
F122
F123
F124
F125
F126
F127
F128
F129
F130
F131
F132
F133
F134
F135
F136
F137
F138
F139
F140
F141
F142
F143
F144
F145
F146
F147
F148
DATA LENGTH
0~255
0~255
0~255
0~255
0~255
0~255
0~255
0~60
0~60
0~60
0(DISABLE) /
1(ENABLE)
0…+10
0…+10
0…+10
0…+10
0(DISABLE) /
1(ENABLE)
0(DISABLE) /
1(ENABLE)
0(DISABLE) /
1(ENABLE)
0/1
0/1
0/1
0/1
0/1
0/1
-63…0…+63
-63…0…+63
-63…0…+63
-63…0…+63
-63…0…+63
-63…0…+63
-63…0…+63
-31…0…+31
0..2
-63…0…+63
-63…0…+63
0…15
0…15
0/1
-15…0…+15
-4…0…+4
-4…0…+4
0(DISABLE) /
1(ENABLE)
0(DISABLE) /
1(ENABLE)
0...3
0...3
0(NORMAL) /
1(GAIN UP)
0…15
0(NORMAL) /
1(FREE RUN)
0/10
0/11
0/10
0..6030
0..6050
0..6060
-30..0..+300
-30..0..+300
INITIAL DATA FIX/ADJ/AUTOREMARK
70 FIX
150 FIX
156 FIX
163 FIX
165 FIX
170FIX
180 FIX
21 FIX
60 FIX
7FIX
1FIX
+10FIX
+10FIX
+10FIX
+10FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
0FIX
2FIX
0FIX
0FIX
8*FIX
8*FIX
BUS SETUP
BUS SETUP
0FIX
+7FIX
0
0
*FIX
*FIX
BUS SETUP
BUS SETUP
0FIX
0FIX
0FIX
0*FIX
BUS SETUP
0FIX
0FIX
1
FIX
FIX
FIX
FIX
*FIX
*FIX
BUS SETUP
BUS SETUP
FIX
FIX
FIX
3 – 9
Page 13
SETTING MODE (SECOND STAGE)
(
)
(
)
(
)
)
)
)
EEPROM ITEMSFUNCTIONOSD
BRIGHT MOVIE
COL NEWS
COL MUSIC
COL MOVIE
SHARP NEWS
SHARP MUSIC
SHARP MOVIE
SURR NEWS
SURR MUSIC
SURR MOVIE
TREBLE NEW S
TREBLE MUSIC
TREBLE MOVIE
BASS NEWS
BASS MUSIC
BASS MOVIE
S-BOOST NEWS
S-BOOST MUSIC
S-BOOST MOVIE
R-R-C
B-R-C
R-B-C
B-B-C
TRE OFFSET SUR ONII
VFREE2
VD3 / VD2 / VD1-TV
VD3 / VD2 / VD1-AV
VD3 / VD2 / VD1-YUV
SL-TV (WEAK)
VIF-AGC THRESHOLD
AFT OFFSETAFT OFFSET
VOL-STARTVOLUME START POINT
VOL-STEPVOLUME STEP
BASS-LIMIT1BASS-LIMIT1
BASS-LIMIT2BASS-LIMIT2
BASS-LIMIT3BASS-LIMIT3
BASS-LIMIT4BASS-LIMIT4
BRIGHTNESS SETTING- MOVIE
COLOUR SETTING- NEWS
COLOUR SETTING- MUSIC
COLOUR SETTING- MOVIE
SHARPNESS SETTING- NEWS
SHARPNESS SETTING- MUSIC
SHARPNESS SETTING- MOVIE
SURROUND SETTING- NEWS
SURROUND SETTING- MUSIC
SURROUND SETTING- MOVIE
TREBLE SETTING- NEWS
TREBLE SETTING- MUSIC
TREBLE SETTING- MOVIE
BASS SETTING- NEWS
BASS SETTING- MUSIC
BASS SETTING- MOVIE
S-BOOSTER SETTING- NEWS
S-BOOSTER SETTING- MUSIC
S-BOOSTER SETTING- MOVIE
R-GAIN OFFSET WHEN WHITE
TEMP IS RED CENTER TONE
B -GAIN OFFSET W HEN WHITE
TEMP IS RED CENTER TONE
R-GAIN OFFSET WHEN WHITE
TEMP IS BLUE CENTER TONE
B-GAIN OFFSET WHEN W HITE
TEMP IS BLUE CENTER TONE
TREBLE OFFSET WHEN
SURROUND ONII
V-FREE WHEN H LOCKED OUT
VD2 & VD1-VERT SYNC DETECT
MIN W IDTH MS B & LS B
RESPECTIVELY (TV)
VD2 & VD1-VERT SYNC DETECT
MIN W IDTH MS B & LS B
RESPECTIVELY (AV)
VD2 & VD1-VERT SYNC DETECT
MIN W IDTH MS B & LS B
RESPECTIVELY (YUV)
SL-TV (WEAK)
VIF AGC THRESHOLD
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
BUS SETUP
3 – 10
Page 14
OPTION MODE (FOURTH STAGE)
(
)
,
,
(
)
)
(
)
y
(
)
(
)
(
)
(
)
EEPROM ITEMS
***HOTEL MODE
***HTL-POS
***HTL-VOL
VIF-NOT-USE
SECAM
N443(RF)
N358(RF)
Force-Col
S-SYS
AV
AV2
YUV
S-CTRL
NICAM-NOT-USE
A2-NOT-USE
TEXT-NOT-USE
BIL
LANG
SERCH-SP
R/C-MENU
LED-CONT
S-BOOSTER
SHARP-LOGO
TUNER BAND
WHITE BACK
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
(ONLY FUNCTION IF
ANTE NNA BO OSTER
O26
=1)
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
OPTION SET UP
*** HOTEL MODE
OPERATION OF HOTEL MODE:
WHEN CHANGE SERVICE DATA O01 TO 1, HOTEL MODE IS ON
WHEN HOTEL MODE IS ON,
1. Max volume data is determined by option setting HTL-VOL (O03)
2. Channel position after POWER ON is determined by option setting HOTEL-POS (O02) (if option setting
HOTEL-POS is not set, processing is according to last position data).
3. User data updates of EEPROM regarding the video and audio control is not allowed.
4. Preset mode is disable.
5. CH SETTING menu is not available.
** TUNER BAND
41.10MHz ~ 122.10MHz
122.15MHz ~ 143.10MHz
143.15MHz ~ 362.10MHz
362.15MHz ~ 426.10MHz
426.15MHz ~ 871.10MHz
P-Freq
VHF-H (0010)
UHF (1000)
BAND
TUNER BAND = 1TUNER BAND = 0 (same as GA6)
VHF-L (0001)VHF-L (0001)
VHF-H (0010)
UHF (1000)
3 – 11
Page 15
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
ADJ ITEM: BUS SET UP (1 ST & 2ND STAGE SERVICE DATA)
F136
F144 CONT NEWS
F145 CONT MUSIC
F150 COL NEWS
F152 COL MOVIE
F153 SHARP NEWS
F155 SHARP MOVIE
TREBLE NEW S
F159
TREBLE MUSIC
F160
TREBLE MOVIE
F161
F162
BASS NEWS
BASS MUSIC
F163
BASS MOVIE
F164
TRE OFFSET SUR ONII
F172
AFT OFFSET
F179
VOL-START
F180
VOL-STEP
F181
BASS-LIMIT1
F182
BASS-LIMIT2
F183
BASS-LIMIT3
F184
F185
BASS-LIMIT4
38
90
63
+4
-2
44
-9
36
+3
38
1
7
5
6
+4
+12
+8
+14
+1
+7
+2
+7
+7
+1
+7
+2
+7
+7
+7
+2
0
-9
-6
+8
1
1
2
3
3
3
0
4
0
25
40
0
8
8
0
0
0
50
60
-5
+6
-6
+6
-10
0
+5
-5
0
+10
+1
2
60
0
7
7
7
7
REMARK
ADJUST IF NECESSARY
TO IMPROVE
3 – 12
Page 16
ADJ ITEM: OPTION SET UP (4TH STAGE SERVICE DATA)
)
)
)
)
)
)
)
)
(RF)
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
SERVICE ITEMS
O01
HTL MODE
O02
HTL-POS
HTL-VOL
O03
HSYNC-JUDGE
O04
SECAM
O05
N443(RF
O06
N358
O07
FORCE-COL
O08
S-SYS
O09
AV
O10
AV2
O11
YUV
O12
S-CTRL
O13
NICAM-NOT-USE
O14
A2-NOT-USE
O15
TEXT-NOT-USE
O16
BIL
O17
LANG 1~255
O18
SEARCH-SP
O19
R/C MENU
O20
LED-CONT
O21
S-BOOSTER
O22
SHARP-LOGO
O23
O24
TUNER BAND
O25
WHITE BACK
O26
BOOSTER
O27 250 CHANNEL
O28
AVL
O29 LNA TUNER
O30 CHILD LOCK
O31 NORMAL KEY
O32 AV MODE
O33 S-CTRL LIMIT
O34 MP-IN
O35 VIRGIN-MODE
O36 W HITE-TEMP
O37 LK MENU
0(0FF)/1(0N)
0~99,-0~60,--
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
1(BG ONLY)~15(ALL)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
1(350)~2(450)~3(550)~4(650)~5(750)
0 (ENABLE) / 1 (DISABLE)
0(ONELED)/1(TWOLED)
0 (DISABLE) / 1 (ENABLE)
0 (DISABLE) / 1 (ENABLE)
0/1
0(DISABLE)/1(ENABLE
0 (DISABLE) / 1 (ENABLE)
0(100 channels) /1(250 channels)
0(fixto0)~1(fixto1)~2(AVLin
SOUND MENU)
0 (Alps) / 1 (Matsushita)
0(DISABLE)/1(ENABLE
0 (PICTURE & SOUND) /1 (PICTURE
ONLY)
0(DISABLE)/1(ENABLE
0(DISABLE)/1(ENABLE
0(DISABLE)/1(ENABLE
0(DISABLE)/1(ENABLE
0(3MODES)/1(5MODES
0 (DISABLE) / 1 (ENABLE)
21F-PT220
0
--
-0
0
0
1
0
5
1
1
0
0
0
0
0
1
5
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
21F-PA18
21F-PA18(B)
21F-PD250
0
--
-0
0
0
1
0
5
1
0
0
0
0
0
0
1
5
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
3 – 13
Page 17
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
[2] ADJUSTMENT
ADJUSTMENT PRECAUTION: Makesure TV Set is in “Normal Condition” before switch to Service Mode for Adjustment.
1. PIF ADJUSTMENT
No.
Adjustment point
Tuner IFT
11. Get the tuner ready to receive the CH. E - 9
( PRESET )
Adjustment procedure/conditionsWaveform and others
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 IMPEDANCE probe with wave detector ; see Fig.1 ) to
the tuner's IF output terminal. ( This terminal must
have the probe alone connected ).
5. Set the RF AGC to 0 - 6 V with no saturation with
the waveform.
6. Adjust the tuner IF coil to obtain the waveform as
shown in Fig. 2.
Note: Be sure to keep the tuner cover in posi-
tion during this adjustment.
RF-AGC
2
TAKE OVER
POINT ADJUSTMENT
2
CBUS
(I
CONTROL)
(AUTO &
Oscilloscope
+
0.1V
-
+
TP201
TV Set
MANUAL ADJ)
-
Bias box
Bias box: About 4.5 V
Fig. 3-1
1000p
10k
Oscilloscope
100k
1n60
1000p
IF OUT
75ohm
Fig.1
E-9 CH
PC
-1.5+/-0.8dB
Fig.2
* for Auto ADJ
1)Receive “PAL COLOUR BAR”
signal.
signal strength: 56
±1dBµV(75
ohm open)**
1)Go to service mode.
2)Go to service data V01, press
R/C to operate auto key (Hex
C1) and confirm the ‘OK’
display on the screen.
3)If appear NG, increase data
some step and pls repeat step
4)Proceed step 4 & 5 in manual
mode.
2.
3 – 14
Page 18
2. PURITY ADJUSTMENT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
No.
Adjustment point
PURITY ADJ.
1
(No need if used
ITC CRT)
Adjustment procedure/conditionsWaveform and others
1. Receive the GREEN-ONLY signal. Adjust the
beam current to ~700 µA .
2. Degauss the CRT enough with the degausing coil.
Note: Follow the Job Instruction Sheet to adjust
the magnetic field.
(Reference: page 3-5)
3. Maintain the purity magnet at the zero magnetic
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: 108 ± 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
µ
longer with a beam current over 700
Note:
Set to service mode by remote con-
A.
troller then press factory process R/C
RGB key to change to RGB mono colour mode.
* For the following colours press R/C RGB(Hex 7E)
key to change.
a
30mm30mm
Fig. 1-1
b
A
B
A=B
Fig. 1-2
Rank "A"
(on the right of the CRT)
GREEN
ONLY
BLUE
ONLY
Signal-colour
screen cleared
A
RED
ONLY
B
A=B
Fig. 1-3
Rank "A"
(on the left of the CRT)
* Press R/C RGB key for 1 sec-
ond in NORMAL MODE, the
colour will change to RGB
mono colour mode.
3 – 15
Page 19
3. CONVERGENCE ADJUSTMENT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
No.
1
Adjustment point
CONVERGENCE
ADJ.
(Tobedone
after the purity
adjustment.)
(No need if used
ITC CRT)
Adjustment procedure/conditionsWaveform and others
1. Receive the "Crosshatch Pattern" signal.
2. Using the remote controller, call NORMAL mode.
Static convergence
1. Turn the 4-pole magnet to a proper opening angle in order to superpose the blue and red colours.
2. Turn the 6-pole magnet to a proper opening angle in order to superpose the green colour over
the blue and red colours.
Dynamic convergence
1. Adjust the convergence on the fringes of the
screen in the following steps.
a) Fig. a: Drive the wedge at point "a" and swing
the deflection coil upward.
b) Fig. b: Drive the wedge at point "b" and "c" and
swing the deflection coil downward.
c) Fig. c: Drive the "c" wedge deeper and swing
the deflection coil rightward.
d) Fig. d: Drive the "b" wedge deeper and swing
the deflection coil leftward.
2. Fix all the wedges on the CRT and apply glass
tape over them.
3. Apply lacquer to the deflection yoke lock screw,
magnet unit (purity, 4-pole, 6-pole magnets) and
magnet unit lock screw.
BGR
B
G
R
Fig. a
RGB
R
G
B
Fig. b
B
RGB
G
R
Fig. c
R
BGR
G
B
Finally received the Red-only and Blue-only signals to make sure there is no other colours on the
screen.
4-pole magnet
6-pole magnet
CRT neck
Lacquer
Purity magnet
20mm
About
100Deg
Lacquer
Wedge
"b"
Fig. d
Wedge "a"
About
100Deg
Wedge
"c"
3 – 16
Page 20
4. H-VCO, VIF-VCO & S-TRAP fo ADJUSTMENT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
No.
1
2
Adjustment point
H-VCO ADJ
2
CBUS
(I
CONTROL)
(AUTO &
MANUAL ADJ)
VIF-VCO ADJ
2
CBUS
(I
CONTROL)
(AUTO &
MANUAL ADJ)
Adjustment procedure/conditionsWaveform and others
(MANUAL ADJ)
1) In No signal (RASTER) condition.
2) Go to service mode, choose service data V03.
3) Connect oscilloscope to IC801 pin13 (H-OUT),
adj
V03
until freq become
15.625±0.15 KHz
(Auto Adj)
1) In No signal (RASTER) condition.
2) Go to service mode.
3) Choose service data V03, by pressing R/C Auto(Hex C1) key, OSD will appear “OK” at screen.
4) If appear “NG” pls repeat step 3.
(Manual ADJ)
1) In No signal (RASTER) condition.
2) Go to service mode, choose service data V02.
3) Connect oscilloscope to IC801 pin7 (AFT),
adj
V02
until voltage become
2.5±1V
.
(Auto Adj)
1) In No signal (RASTER) condition.
2) Go to service mode, choose service data V02.
3) Press the R/C Auto (Hex C1) key, OSD will appear
“OK” at screen.
4) If appear “NG” pls repeat step 3.
This adjustment must be done
after aging at least 3 minutes.
S-TRAP fo
3
ADJ
2
CBUS
(I
CONTROL)
(AUTO &
MANUAL ADJ)
(Manual ADJ)
1) In No signal (RASTER) condition.
2) Go to service mode, choose service data V21.
3) Connect oscilloscope to TP 801, adj V21 until
voltage become Min (below 5 V).
4) After that pls adj service data V20 same as
“V21”, V22 to “V21+1”, V23 to “V21-2”.
(Auto Adj)
1) In No signal (RASTER) condition.
2) Go to service mode, choose service data
V21.
(S-TRAP I).
3) Press the R/C Auto (Hex C1) key, OSD will appear
“OK” at screen.
4) If appear “NG” pls repeat step 3.
5) Adjust V24 (S-TRAP 574) by repeating step 3 &
4 at final line after aging TV set to get accurate
data.
*CAUTION :
Make sure to adjust V24 at final
line after aging the TV set.
3 – 17
Page 21
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
5. SCREEN, WHITE BALANCE, SUB-BRIGHTNESS & SUB-CONTRAST ADJUSTMENT
No.
Adjustment point
1
SCREEN
ADJUSTMENT
2
(I
CBUS
CONTROL)
Adjustment procedure/conditionsWaveform and others
1) In window pattern signal condition.
2) Go to service mode, then select V00.
3)
By pressing R/C key S-Mute (Hex E8), R-D
auto switch to 63, B-D auto switch to 63, R-
C auto switch to 127, G-C auto switch to
127, B-C auto switch to 127, Subbrightness V06 auto switch to 127.
Y-mute & Vertical off, screen will be in
vertical cut-off condition.
4)
Adjust the Screen so that cut-off line ap-
R-CUTOFF (R-C) UP
R-CUTOFF (R-C) DOWN
G-CUTOFF (G-C) UP
G-CUTOFF (G-C) DOWN
B-CUTOFF (B-C) UP
B-CUTOFF (B-C) DOWN
R-DRIVE (R-D) UP
R-DRIVE (R-D) DOWN
B-DRIVE (B-D) UP
B-DRIVE (B-D) DOWN
pear in low bright, then judge that whether
the cut-off line appear in Red or Green or
Blue color, in this condition between R-C &
G-C & B-C, fix the data of the color appear
in cut-off line and adj the other two cut-off
data (Note 1) so that cut-off line color become white.
Turn the screen VR of FBT so that cut-off
line just disappear and use R/C by press-
ing key S-Mute (Hex E8) to disable the Y-
mute & V-cut so that picture appear in normal mode.
WHITE (HIGH BEAM) ( In Window Pattern
1)
Signal)
First use Minolta Color Analyzer CA100, let
the gun point at Dark White position (as
drawing attach), Adj V06 until LUMI-NANCE Y become 5 cd/m2, then let the
gun point at White position ( as drawing attach), Adj V04 until LUMINANCE Y become: 160 cd/m2.
Adj the R-D & B-D until the axis of color
temperature become
o
12300
KX:0.272
Y:0.275
DARK WHITE (LOW BEAM) (In Window
2)
Pattern Signal)
Let the gun point at Dark White position, if
the color temperature data shift away from
the data adjusted in step 1, adjust R-C, G-
C & B-C but between them, first color
appears in Screen adj item 1)-4 is fixed,
adj the other two so that to obtain the similaraxisasabove.
** Repeat step 1 & 2 to get a regulated
position
5.5% IRE
*Note :
WINDOW PATTERN SIGNAL
White
50% IRE
Signal using W/B Pattern Generator
SX-1006 (IWATSU) or equivalent.
Window Pattern Signal output level
are as above:
Dark White
9.5% IRE
3 – 18
Page 22
No.
Adjustment point
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
Adjustment procedure/conditionsWaveform and others
SUB-
3
BRIGHTNESS
(to be done
after screen,
white balance
adj)
(12C BUS
CONTROL)
4
SUBCONTRAST
(to be done
after screen,
white balance
adj,
sub-brightness adj)
(I
CONTROL)
2
CBUS
1) In Window Pattern Signal condition.
2)
Using Minolta Color Analyzer CA-100, let the
gun point at Dark White position (as attach
drawing), adjust V06 Bus data until
LUMINANCEY=3±0.5cd/m2.
1) In Window Pattern Signal condition.
2)
Using Minolta Color Analyzer CA-100, let the
gun point at White position (as attach drawing),
adjust V04 Bus data until LUMINANCE Y = 160
±10cd/m2
WINDOW PATTERN SIGNAL
Dark White
WINDOW PATTERN SIGNAL
White
Beam Current
5
Check
1) Receive the “Monoscope Pattern” signal.
2) Press R/C to set Picture NORMAL condition.
3) Connect the DC miliammeter between TP 603
(+)&TP602(-).
(Full Scale: 3mA Range)
µ
4) Beam current must be within 1100±100
A.
3 – 19
Page 23
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
6. HORIZONTAL, VERTICAL, DEFLECTION LOOP and FOCUS ADJUSTMENT
No.
Adjustment point
H-SHIFT
1
2
C BUS
(I
CONTROL)
(to be done
after purity adj)
V-SHIFT
2
2
(I
C BUS
CONTROL)
(to be done
after purity adj)
1) Receive Monoscope Pattern Signal (PAL 50Hz).
2) Choose the service data V13.
3) Adjust the V13 bus data to have a balance position to
spec of A=B (as attach drawing).
4) If cannot make it to A=B, adjust from the best point so
that B slightly smaller than A.
1) Receive Monoscope Pattern Signal (PAL 50Hz).
2) Choose the service data V12.
3) Adjust the V12 bus data to have a most acceptable
vertical position, the monoscope pattern should be
Balance in vertical position.
Adjustment procedure/conditionsWaveform and others
Note: B line (Monoscope middle line) must same or
nearest higher position to the A mark (Tube middle
mark), refer to the attach drawing.
V-SIZE
3
2
(I
C BUS
CONTROL)
(to be done
after purity,
1) Receive Monoscope Pattern Signal (PAL 50Hz).
2) Choose the service data V11.
3) Adjust V11 bus data until the overscan become
10 1.5%.
Caution 1: Pls aging TV more than 10 minutes before
V-shift adj)
Caution 2: for H-shift & V-shift & V-size adj, after adj
pls switch to Monoscope pattern signal (NTSC 60 Hz)
to confirm all positions are the same.
4
SUB-
1) Confirm Service data V08 & V32 are 38.
SHARPNESS
5
FOCUS
1) Receive the "Monoscope Pattern" signal.
2)
Press R/C to set Picture NORMAL condition.
3) Adjust the focus control to get the best focusing.
7. PAL CHROMA ADJUSTMENT
No.
Adjustment point
adjustment
Focusing Point
(middle of center
and edge of
monoscope
pattern)
Adjustment procedure/conditionsWaveform and others
SUB COLOUR
1
2
(I
CONTROL)
(to be done
after subpicture, subtint adj)
C BUS
1) Receive the “PAL Colour Bar” signal.
2) Press R/C to set Picture Normal condition.
3) Connect the oscilloscope to R-Amp Transistor
Base(JUMPER 401).
Range :100mV/Div (AC)
(Using 10:1 Probe)
Sweep Time : 10 msec/Div
4) Using the R/C call V05 in SERVICE mode. Adjust V05 bus data, so that the 75% White & Red
portions of PAL Colour Bar be at the same level
shown as Fig 1-1.
5) Clear the SERVICE mode.
3 – 20
75%
CyGB
Y 100% W Mg R
W
Fig. 1-1
Page 24
8. NTSC CHROMA ADJUSTMENT
No.
Adjustment point
SUB-TINT
1
(I
CONTROL)
2
CBUS
1) Receive the "NTSC 3.58 Color Bar" signal thru
AV in.
2) Connect the oscilloscope to B-Amp Transistor
Base (JUMPER 410).
3) In Service mode, go to V07,pressR/C Y-mute(Hex F4) or FLASHBACK Key.
4) Call the "V07" data in service mode. Adjust the
"V07" bus data to obtain the waveform shown as
Fig. 1-1.
5) Disable Y-Mute by pressing key (Hex E4) orFLASHBACK, then clear the SERVICE mode.
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
Adjustment procedure/conditionsWaveform and others
9. PROTECTOR OPERATION CHECKING
No.
Adjustment point
BEAM1) Receive "Monoscope Pattern" signal.
1* Select one of Q853/4/5 to do
PROTECTOR
2) Set CONTRAST MAX.
Adjustment procedure/conditionsWaveform and others
each short.
3) Set BRIGHT MAX.
4) During the Collector & Emitter of Q853/4/5 short,
make sure the protector ON and switch to standby
mode.
H, V PROTECTOR1) Receive "Monoscope Pattern" signal.
2
2) Connect output of Bias Box to D602 cathode
(C602 positive).
3) Set voltage of Bias Box to 18V and make sure
the protector is not working.
4) Set voltage of Bias Box to 27V , and make sure
the protector is working.
3
OTHER
PROTECTOR
1) Once finish rectified Electrolytic Capacitor short
testing in +B line, check all possible damaged
components on +B line.
(Use random selected set for inspection)
3 – 21
Page 25
10. A/V INPUT, OUTPUT CHECKING
(2)
ADJUSTMENT POINT
NO
1VIDEO AND AUDIO
OUTPUT CHECK
(1) Receive the "PAL Color Bar" signal (100% White Color Bar, Sound
400 Hz 100% Mod).
ADJUSTMENT CONDITION / PROCEDURE
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
WAVEFORM OR OTHERS
2VIDEO AND AUDIO
INPUT CHECK
(2) Terminate the Video output with a 75 ohm impedance. Make sure the output
is as specified
(3) Terminate the Audio output with a 10K ohm impedance. Make sure the O/P
is as specified
(1) Using the TV/VIDEO 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.
Video cross-talk AV to TV checking:
a) When connect AV1 input, check TV also
b) When connect AV2 input, check TV also (Model 21F-PT220 only)
2) Set MENU, then go into PICTURE mode to select BRIGHTNESS.
3) Press Volume Up/Down key to check whether the
BRIGHTNESSeffectisOKornot.
TINT key1) Receive the "NTSC Colour Bar" signal thru AV in.
4
2) Set MENU, then go into PICTURE 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 MENU, then go into PICTURE 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 (0~99) will have an OSD display of the
channel number in green colour under AFT ON
condition.
3 – 22
Page 26
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
No.
8
9
Adjustment point
NORMAL Key7
WHITE TEMP
COLOUR
SYSTEM
Adjustment procedure/conditionsWaveform and others
Once in PICTURE Mode, and the NORMAL key is
1)
pressed, all the settings will be preset to normal setting
accordingly.
PICTURE MODE
CONTRAST60
COLOUR+6
BRIGHTNESS0
TINTCENTER
SHARPNESS+6
WHITE TEMPMid
1) Receive "Monoscope Pattern" signal.
2) Set MENU, then go into PICTURE mode to se-
lect WHITE TEMP
3) Press Vo ume Up/Down key to check WHITE
TEMP function The back ground will change to
(shift right) bluish and (shift left) reddish.
Receive the "PAL COLOUR BAR" signal, press
1)
MENU, choose CH-SETTING to select COLOR
modes except PAL, check the COLOUR is not
working properly. Then, select the "PAL" mode.
Check again its colour so that it is working properly.
Receive "NTSC 4.43" signal, press MENU, choose
2)
CH-SETTING to select COLOR modes except
N443, check the COLOUR is not working properly.
Then, select the N443 mode. Check again its colour so that it is working properly.
Receive "NTSC 3.58" signal thru AV, press MENU,
3)
choose CH-SETTING to select COLOR modes except N358, check the COLOUR is not working
properly. Then, select the N358 mode. Check again
its colour so that it is working properly.
*
Note:
In NORMAL Mode, when
press NORMAL key, will appear NORMAL OSD and all
setting PICTURE function
set to NORMAL.
SOUND
10
SYSTEM
11OSD
LANGUAGE
QUANTITY
CHECK
Receive "PAL-B/G" signal, press the “SOUND
1)
SYSTEM” to select D/K. Check the sound output
in not working proprely. Select B/G and check the
sound output to make sure it is working properly.
Receive "PAL-D/K" signal, press the “SOUND
2)
SYSTEM” to select B/G. Check the sound output
in not working proprely. Select D/K and check the
sound output to make sure it is working properly.
Check OSD LANGUAGE quantity and type for
1)
respect model.
MODEL
ALL MODEL 2 O O
QUANTITY ENGLISH THAI
3 – 23
Page 27
12. SHOCK TEST CHECKING
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
No.
Adjustment point
SHOCK TEST1) Hit at the top of TV set for two time.
1
Adjustment procedure/conditionsWaveform and others
2) Check TV set not damage and TV operation operate correctly.
3 – 24
Page 28
CHAPTER 4. MEMORY MAP
[1] MEMORY MAP
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
MODEL :
GA-7_IXC129WJN1
EEPROM CHECK DATA LIST 1
SEM PCD SOFTWARE GROUPTV DESIGN ENGINEERINGTV PRODUCTION ENGINEERING
WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE
MODELMODEL
LAST INITIAL
SETTING DATA
MATSUNAGA
ISMAIL
CHIN
REMARK
LETTER NO.LETTER NO.
4 – 32
Page 60
TV21Q-FG1FService Manual21Q-FG1FMarketE
CHAPTER 5. TROUBLE SHOOTING FLOWCHART
[1] TROUBLE SHOOTING FLOWCHART
NO RASTER
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
Check NR701.
Check D751.
Check F701.
Check T702 pin (17) voltage
(Approx. 310V at 220V AC)
Check Secondary Main+B
(Approx. 125V)
Check CRT connector Kwire and the signal on it.
Check 185V
Bias on
CRT board.
Does horizontal circuit
oscillate ?
Check Q601 and Q602.
Check
IC801.
Blown out.
Replace the fuse.
The fuse is blown out again.
Check IC701, D701 and
C705.
Check Q752 for 8V regulator
circuit and Q753, IC751, Q754
for 5V regulator circuit.
Checking the
protector circuit.
CIRCUITS TO BE CHECKED:
Tuner.
PIF.
Automatic Gain Control.
(5V), (32V) Power Source.
Noise increases but no signal is
received.
Check the tuner supply voltage LB must
approx. 5V. BT must be approx. 33V.
And check the CH preset data.
Check the tuner AGC at
TP201.
Check pin(24) of
IC801.
Check pin (37) of
IC801, Tuner and
related circuit.
NO PICTURE, NO SOUND
Does the noise level increase at max.
Contrast, Brightness and Sound controls ?
Does noise or signal appear at pin (24)
of IC801 ?
Does noise or
signal appear at
pin (38) and (39)
of IC801 ?
Check pin (1) of
SF201, Tuner and
related circuit.
No snow noise.
Check IC801 and
related circuit.
Check pin (36) at
IC801 and related
circuit.
5 – 1
Page 61
TROUBLE SHOOTING FLOWCHART (Continued)
CIRCUITS TO BE CHECKED:
Sound Detector Circuit.
Sound Switch and Att.
Control.
Audio Output Circuit.
Does signal appear at pins
(8) of IC301 ?
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
NO SOUND
Check signal appear from pin (50)
of IC801 to pin (4) of IC301.
Check Speaker.
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED:
Sync. Separator Circuit.
Check IC301 and
peripheral circuit.
NEITHER VERTICAL NOR
Check pins(9), (13) and (14)
of IC801.
NO VERTICAL SCAN
Check IC501 bias.
5 – 2
Check IC501.Check C511.
Page 62
TROUBLE SHOOTING FLOWCHART (Continued)
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Re-adjust vertical size.
(Bus Data)
Vertical linearity and size are
abnormal.
Check R503, R506, R513,
R520 and C515.
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
Check IC801.
Check Q855 and its adjacent
circuits.
NO SPECIFIC COLOUR
Is some colour produced in
B/W broadcast reception ?
Check Q854 and its adjacent
circuits.
Is the white balance properly
adjusted ?
Re-adjust the white balance.
The picture colour is yellow.The picture colour is magenta.The picture colour is cyan.
Check Q853 and its adjacent
circuits.
NO COLOUR
“PAL”
(NO COLOUR SYNCHRONIZATION)
Check IC801 and bias
control circuit.
Check X801 (4.43MHz)
5 – 3
Page 63
TV21Q-FG1F21Q-FG1FMarketE
CHAPTER 6.
SOLID STATE DEVICE BASE DIAGRAM
[1] SOLID STATE DEVICE BASE DIAGRAM
TOP VIEW
85
COLLECTOR
COLLECTOR
HR
14
M24C08
CATHODE
A
2
ANODE
EX1393C
BASEEMITTER
C3928
BASEEMITTER
TR
A1530
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
6441
6540
IXC129WJ
8025
14
IXC129WJ
SIDE VIEW
ECB
2SC3198
PX0013
CATHOD
ANODE (RED)
ECB
2SD468-C
2SC2235
+~~
DX0476CE
TT2140
LOTNo.
123
TT2140
_
LA42031E
ECB
113
LA42031E
3. BASE
BF422
2. COLLECTOR
1. EMITTER
17
STV9302B
14
PQ05RDA
17
STRW5453
6 – 1
Page 64
CHAPTER 7. CHASSIS LAYOUT
[1] CHASSIS LAYOUT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
7 – 1
Page 65
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
7 – 2
Page 66
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
CHAPTER 8.
BLOCK DIAGRAM
[1] BLOCK DIAGRAM: MAIN UNIT
8 – 1
Page 67
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
8 – 2
Page 68
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
8 – 3
Page 69
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
8 – 4
Page 70
[2] BLOCK DIAGRAM: CRT UNIT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
8 – 5
Page 71
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
TV21Q-FG1FService Manual21Q-FG1FMarketE
CHAPTER 9. DESCRIPTION OF SCHEMATIC DIAGRAM
[1] DESCRIPTION OF SCHEMATIC DIAGRAM
SAFETY NOTES:
DISCONNECT THE AC PLUG FROM THE AC OUT-
1.
LET BEFORE REPLACING PARTS.
SEMICONDUCTOR HEAT SINKS SHOULD BE RE-
2.
GARDED AS POTENTIAL SHOCK HAZARDS
WHEN THE CHASSIS IS OPERATING.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH "" () ARE IMPOTANT FOR MAINTAINING THE SAFETY OF THE SET.
BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY AND
PERFORMANCE OF THE SET.
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE (-) IS DIRECTLY CONNECTED WITH AC MAINS VOLTAGE.
WHEN SERVICING THE AREA, CONNECT AN ISOLATING TRANSFORMER BETWEEN TV RECEIVER AND
AC LINE TO ELIMINATE HAZARD OF ELECTRIC
SHOCK.
NOTES:
The unit of resistance "ohm" is omitted.
1.
(K = 1000 ohms, M = Mega ohm).
All resistors are 1/16 watt, unless otherwise noted.2.
All capacitors are µF, unless otherwise noted.
3.
(P = µµF).
VOLTAGE MEASUREMENT CONDITIONS:
Voltages in parenthesis measured with no signal.1.
Voltages without parenthesis measured with 3mV B & W
2.
or Colour signal.
All the voltages in each point are measured with VTVM.3.
WAVEFORM MEASUREMENT CONDITIONS:
The colour bar generator signal of 1.0V peak applied at
1.
pin (41) of IC801.
25
Approximately 4V AGC bias.2.
CAUTION:
This circuit diagram is a standard one, prited circuits may
be subject to change for product improvement without prior notice.
9 – 1
Page 72
CHAPTER 10. WAVEFORMS
[1] WAVEFORMS
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
10 – 1
Page 73
CHAPTER 11. SCHEMATIC DIAGRAM
[1] SCHEMATIC DIAGRAM: CRT UNIT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
11 – 1
Page 74
[2] SCHEMATIC DIAGRAM: MAIN UNIT
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
11 – 2
Page 75
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
11 – 3
Page 76
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
11 – 4
Page 77
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
11 – 5
10 11 12 13 14 15 16 17 18 19
Page 78
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
TV21Q-FG1FService Manual21Q-FG1FMarketE
CHAPTER 12. PRINTED WIRING BOARD ASSEMBLIES
[1] PWB-A: MAIN COMPONENT SIDE
12 – 1
Page 79
[2] PWB-A: MAIN CHIP SIDE
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
12 – 2
Page 80
[3] PWB-B: CRT COMPONENT SIDE
D
C
B
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
A
12345678910
[4] PWB-B: CRT CHIP SIDE
D
C
B
A
12345678910
12 – 3
Page 81
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
PARTS GUIDE
21F-PT220
21F-PD250
21F-PA18
[1]PICTURE TUBE
[2]PRINTED WIRING BOARD
ASSEMBLIES
[3]MAIN UNIT
[4]CRT UNIT
MODEL
CONTENTS
21F-PA18(B)
[5]MISCELLANEOUS PARTS
[6]SUPPLIED ACCESSORIES
[7]CABINET PARTS
[8]PACKING PARTS
Parts marked with "" are important for maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and performance of the set.
Main Unit (21F-PT220)
Main Unit (21F-PA18, 21F-PA18(B))
Main Unit (21F-PD250)
CRT Unit (21F-PT220)
CRT Unit (21F-PA18, 21F-PA18(B))
CRT Unit (21F-PD250)
Front Cabinet Assembly
Front Cabinet
Power Button
Spring
R/C & LED Cover
Control Button
Sharp Badge
Rear Cabinet Assembly
Rear Cabinet
CABINET PARTS (21F-PA18 / 21F-PA18(B))
CCABAB876WEA0
1
CCABAB877WEA0
Not Available
1-1
JBTN-A455WJSA
1-2
MSPRC0005PEFW
1-3
COVAB226WJSA
1-4
HBDGB0001KJSC
1-5
GDORFA152WJSA
1-6
MSPRPA025WJFW
1-7
HINDPB780WJZZ
1-8
CCABBA215WEA0
2
Not Available
2-1
Front Cabinet Assembly (for 21F-PA18 only)
Front Cabinet Assembly (for 21F-PA18(B) only)
Front Cabinet
Power Button
Power Button Spring
R/C & LED Cover
Sharp Badge
Door
Door Spring
Indication Plate
Rear Cabinet
Cab B Indication Plate
CABINET PARTS (21F-PD250)
CCABAB849WEA0
1
Not Available
1-1
JBTN-A571WJSC
1-2
MSPRCA067WJFW
1-3
GCOVAB628WJSA
1-4
JBTN-A572WJSB
1-5
HBDGB0001KJSC
1-6
CCABBB148WEA0
2
Not Available
2-1
LHLDWA101WJZZ
2-2
Front Cabinet Assembly
Front Cabinet
Power Button
Spring
R/C & LED Cover
Control Button
Sharp Badge
Rear Cabinet Assembly
Rear Cabinet
AC Cord Hook