Sharp 21FL91 User manual

21FL91
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
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.
COLORTELEVISION
Chassis No. GA-2
Page
»ELECTRICAL SPECIFICATIONS .........................................................................................................1
»IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
»LOCATION OF USER'S CONTROL .....................................................................................................4
»INSTALLATION AND SERVICE INSTRUCTIONS................................................................................5
»SERVICE MODE ..................................................................................................................................6
»ADJUSTMENT METHOD ...................................................................................................................11
»CHASSIS LAYOUT .............................................................................................................................26
»BLOCK DIAGRAM ..............................................................................................................................27
»SCHEMATIC DIAGRAMS ...................................................................................................................33
»PRINTED WIRING BOARD ASSEMBLIES ........................................................................................38
»REPLACEMENT PARTS LIST............................................................................................................42
»PACKING OF THE SET......................................................................................................................48
CONTENTS
SPEAKER
SIZE ...................................................................12 x 5 cm, 2pcs
VOICE COIL IMPEDANCE............................. 16 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF.....................................................75 ohm Unbalanced
TUNING RANGES
VHF-Channels...............................................................2 thru 13
UHF-Channels ............................................................14 thru 69
CATV Channels ...........................................................1 thru 125
(EIA, Channel Plan U.S.A.)
POWER INPUT....................................... AC 110~220 V, 50/60 Hz
POWER RATING .................................................................... 95W
PICTURE SIZE .......................................... 1,239 cm2 (192sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
(Nominal)
AUDIO POWER
OUTPUT RATING ........................................3.0 W(RMS) x 2pcs
Specifications are subject to change without
prior notice.
ELECTRICAL SPECIFICATIONS
MODEL
SERVICE MANUAL
21FL91
SX2U321FL91//

2
21FL91
IMPORTANT SERVICE SAFETY PRECAUTION
ËService work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and the servicing guidelines which follow:
X-RADIATION AND HIGHVOLTAGE LIMITS
1. Be sure all service personnel are aware of the
procedures and instructions covering X-radiation.
The only potential source of X-ray in current solid
state TV receivers is the picture tube. However, the
picture tube does not emit measurable X-Ray
radiation, if the high voltage is as specified in the
"High Voltage Check" instructions.
It is only when high voltage is excessive that X-
radiation is capable of penetrating the shell of the
picture tube including the lead in the glass material.
The important precaution is to keep the high voltage
below the maximum level specified.
2. It is essential that servicemen have available at all
times an accurate high voltage meter.
The calibration of this meter should be checked
periodically.
3. High voltage should always be kept at the rated value
−no higher. Operation at higher voltages may cause
a failure of the picture tube or high voltage circuitry
and;also, under certain conditions, may produce
radiation in exceeding of desirable levels.
4. When the high voltage regulator is operating properly
there is no possibility of an X-radiation problem.
Every time a color chassis is serviced, the brightness
should be tested while monitoring the high voltage
with a meter to be certain that the high voltage does
not exceed the specified value and that it is regulating
correctly.
5. Do not use a picture tube other than that specified
or make unrecommended circuit modifications to the
high voltage circuitry.
6. When trouble shooting and taking test
measurements on a receiver with excessive high
voltage, avoid being unnecessarily close to the
receiver.
Do not operate the receiver longer than is necessary
to locate the cause of excessive voltage.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
3. Semiconductor heat sinks are potential shock
hazards when the chassis is operating.
4. The chassis in this receiver has two ground systems
which are separated by insulating material. The non-
isolated (hot) ground system is for the B+ voltage
regulator circuit and the horizontal output circuit. The
isolated ground system is for the low B+ DC voltages
and the secondary circuit of the high voltage
transformer.
To prevent electrical shock use an isolation
transformer between the line cord and power
receptacle, when servicing this chassis.
SERVICING OF HIGH VOLTAGE SYSTEM
AND PICTURETUBE
When servicing the high voltage system,
remove the static charge by connecting a
10k ohm resistor in series with an insulated
wire (such as a test probe) between the pic-
ture tube ground and the 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 anode completely.

3
21FL91
123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123
1
2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
3
1
2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
3
123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123
SAFETY NOTICE
Many electrical and mechanical parts in television
receivers have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by "å"
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams.
IMPORTANT SERVICE SAFETY PRECAUTION
(Continued)
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 materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacity networks, mechanical
insulators, etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
•Plug the AC cord directly into a 110~220 volt AC
outlet, (Do not use an isolation transformer for this
test).
•Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series
with all exposed metal cabinet parts and a known
earth ground, such as electrical conduit or electrical
ground connected to earth ground.
•Use anAC voltmeter having with 5000 ohm per volt,
or higher, sensitivity to measure theAC voltage drop
across the resistor.
BEFORE RETURNINGTHE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks.
•Connect the resistor connection to all exposed metal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon, etc.) and measure the AC voltage drop
across the resistor.
AII checks must be repeated with the AC line cord
plug connection reversed. (If necessary, a non-
polarized adapter plug must be used only for the
purpose of completing these check.)
Any current measured must not exceed 0.5 milliamp.
Any measurements not within the limits outlined
above indicate of a potential shock hazard and
corrective action must be taken before returning the
instrument to the customer.
For continued protection, replacement parts must be
identical to those used in the original circuit. The use of
substitute replacement parts which do not have the same
safety characteristics as the factory recommended
replacement parts shown in this service manual, may
create shock, fire, X-radiation or other hazards.
1.5k ohm
10W
0.15 F
TEST PROBE
TO EXPOSED
METAL PARTS CONNECT TO
KNOWN EARTH
GROUND
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212
1
234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
2
1
234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
2
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212

4
21FL91
LOCATION OF USER'S CONTROL

5
21FL91
CIRCUIT PROTECTION
The receiver is protected by a 3.15A fuse (F701),
mounted on PWB-A, wired into one side of the AC
line input.
X-RADIATION PROTECTOR CIRCUITTEST
After service has been performed on the horizontal
deflection system, high voltage system, B+ system,
test the X-Radiation protection circuit to ascertain
proper operation as follows:
1. Apply 110~220V AC using a variac transformer for
accurate input voltage.
2. Allow for warm up and adjust all customer controls
for normal picture and sound.
3. Receive a good local channel.
4. Connect a digital voltmeter to TP653 and make sure
that the voltmeter reads 18.9 ±1.1V.
5. Apply external 24.5V DC at TP653 by using an
external DC supply, TV must be shut off.
6. To reset the protector, unplug the AC cord and make
a short circuit between TP651 andTP652. Now make
sure that normal picture appears on the screen.
7. If the operation of the horizontal oscillator does not
stop in step 5, the circuit must be repaired before the
set is returned to the customer.
HIGHVOLTAGE CHECK
High voltage is not adjustable but must be checked
to verify that the receiver is operating within safe
and efficient design limitations as specified checks
should be as follows:
1. Connect an accurate high voltage meter between
ground and anode of picture tube.
2. Operate receiver for at least 15 minutes at 110~220V
AC line voltage, with a strong air signal or a properly
tuned in test signal.
3. Enter the service mode and set Y-mute ON by using
Service R/C.
4. The voltage should be approximately 28.7kV (at zero
beam).
Ifa correct reading cannot beobtained, check circuitry
for malfunctioning components. After the voltage test,
make Y-mute off to the normal mode.
INSTALLATION AND SERVICE INSTRUCTIONS
Note: (1)When performing any adjustments to resistor controls and transformers use non-metallic
screwdrivers orTV alignment tools.
(2)Before performing adjustments, the TV set must be on at least 15 minutes.

6
21FL91
Service Mode Overview
1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset.
2. Service mode is cleared by entering SERVICE key command during service mode.
3. If key input port (SERVICE) input is LOW, then it is in service mode.
4. During key input port (SERVICE) input is LOW, clearing service mode by key input SERVICE is disabled.
5. Service mode can be switched to 4 modes as follows by key input MENU;
SERVICE MODE
6. AFT processing is disabled during service mode. PLL setting data is set to fo data.
7. All user data are set to default during service mode. FAO and SPEAKER user settings are off and on respectively
in service mode. Energy Save is off.
8. Sleep timer, View timer and Off timer are inactivated in Service mode.
9. Sound is muting in service mode except at Adjustment Items V20, M01, M03, M04, M05, and M06.
Adjustment mode
Setting mode First mode of service mode when SERVICE key is
pressed.
First mode of service mode when local key
CH-UP + VOL-DOWN is pressed after MCU reset.
Option mode
Check mode

7
21FL91
Adjustment Mode Items
No. Item Name IC Register Range Default
V01 SUB-PICTURE 1 Chip CONTRAST 0~127 127
V02 SUB-TINT 1 Chip TINT 0~127 64
V03 SUB-COLOR 1 Chip COLOR 0~127 64
V04 SUB-BRIGHT 1 Chip BRIGHT 0~255 128
V05 SUB-SHARP 1 Chip VIDEO-TONE 0~63 32
V06 V-SHIFT 1 Chip V-SHIFT 0~7 4
V07 H-SHIFT 1 Chip H-PHASE 0~31 16
V08 RF-AGC 1 Chip RF-Delay 0~127 127
V09 V-SIZE 1 Chip V-SIZE 0~63 32
V10 PIF-VCO 1 Chip VIF-VCO 0~63 32
V11 R-CUTOFF 1 Chip R-CUTOFF 0~255 127
V12 G-CUTOFF 1 Chip G-CUTOFF 0~255 127
V13 B-CUTOFF 1 Chip B-CUTOFF 0~255 127
V14 R-DRIVE 1 Chip R-DRIVE 0~127 64
V15 B-DRIVE 1 Chip B-DRIVE 0~127 64
V16 SUB-COLOR(YUV) 1 Chip COLOR 0~127 64
V17 SUB-TINT(YUV) 1 Chip BASEBAND-TINT 0~127 64
V18 CC-POS MICON 0~255 32
V19 (Vertical mode) 1 Chip V-MUTE,SERVICE 0, 1, 2 0
V20 SUB-VOL 1 Chip A-ATT 0~127 127
V21 H-VCO 1 Chip H-VCO 0~7 4
M01 MTS-ATT MTS ATT 0~15 10
M02 MTS-VCO MTS VCO 0~63 32
M03 MTS-FILTER MTS FILTER 0~63 28
M04 MTS-WIDEBAND MTS WIDEBAND 0~63 27
M05 MTS-SPECTRAL MTS SPECTRAL 0~63 32
M06 SUB-VOL MTS VOL 0~63 63

8
21FL91
ËSELF ADJUSTMENT
H-VCO
1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed.
2. H-FREE(1chip) is set to 1.
3. H-OUT is set by intelligent monitor output.
4. IM input is set as TIM input.
5. H-VCO(1chip) data is changed so that the number of input pulse is 125 inside 8ms interval.
6. When adjustment completed, OSD display and H-VCO self-adjustment status data of EEPROM are updated.
7. H-FREE(1chip), intelligent monitor output and IM input mode are recovered.
RF-AGC
1. When there is RF-AGC self-adjustment key input for adjustment item RF-AGC, self-adjustment is performed.
2. AGC-OUT is set by intelligent monitor output.
3. IM input is set as AD input.
4. By decreasing RF-AGC (1chip) data from current RF-AGC adjustment value to 0, AFT input voltage becomes the
maximum setting value.
5. Increase RF-AGC(1chip) data, when AFT input voltage is at (max. 0.3V) point, adjustment is completed.
6. When adjustment completed, OSD display and RF-AGC self-adjustment status data of EEPROM are updated.
7. Intelligent monitor output and IM input mode are recovered.
PIF-VCO
1. When there is PIF-VCO self-adjustment key input for adjustment item PIF-VCO, self-adjustment is performed.
2. VIF-DEF(1chip) is set to 1.
3. AFC is set by intelligent monitor output.
4. IM input is set as AD input.
5. VIF-VCO(1chip) data is changed so that input voltage becomes 2.5V.
6. When adjustment completed, OSD display and PIF-VCO self-adjustment status data of EEPROM are updated.
7. VIF-DEF(1chip), intelligent monitor output and IM input mode are recovered.
MTS-FILTER
Adjustment is performed in the center of the range when FILTER status is OK.
1. If data is changed from 0 to 63, point where NG → OK is A and point where OK → NG is B.
2. If data is changed from 63 to 0, point where NG → OK is C and point where OK → NG is D.
3. (A+B+C+D)/4 is the adjustment point.

9
21FL91
Setting Mode Items
No. Item Name IC Register Range Default
F01 VideoTone-Gain (TV) 1chip V-TONE 0 / 1 0
F02 VideoTone-Gain (AV) 1chip V-TONE 0 / 1 0
F03 VideoTone-Gain(YUV) 1chip V-TONE 0 / 1 0
F04 ABCL 1chip ABCL 0 / 1 0
F05 BS 1chip BS-OFF 0 / 1 0
F06 ABCL-G 1chip ABCL-G 0 / 1 0
F07 SHP-AV OFFSET VIDEO-TONE(OFFSET) -16~+16 0
F08 SHP-YUV OFFSET VIDEO-TONE(OFFSET) -16~+16 0
F09 RGB-CLIP 1chip ExtRGB-Clip 0 / 1 0
F10 E-SAVE OFFSET CONTRAST(OFFSET) 0~63 30
F11 FAO-VOL 1chip A-ATT 0~127 120
F12 PIF-G 1chip VIF-GAIN 0~7 4
F13 Y-DELAY(TV) 1chip Y-Delay 0~7 0
F14 Y-DELAY(AV) 1chip Y-Delay 0~7 0
F15 Y-DELAY(YUV) 1chip Y-Delay 0~7 0
F16 TINT-AV OFFSET TINT(OFFSET) -32~+32 0
F17 COL-AV OFFSET COLOR(OFFSET) -32~+32 0
F18 R-DRI(R2) OFFSET R-DRI(OFFSET) -32~+32 0
F19 R-DRI(R) OFFSET R-DRI(OFFSET) -32~+32 0
F20 R-DRI(B) OFFSET R-DRI(OFFSET) -32 ~+32 0
F21 B-DRI(R2) OFFSET B-DRI(OFFSET) -32~+32 0
F22 B-DRI(R) OFFSET B-DRI(OFFSET) -32~+32 0
F23 B-DRI(B) OFFSET B-DRI(OFFSET) -32~+32 0
F24 V-FREE 1chip V-FREE 0 / 1 0
F25 GAMMA 1chip GAMMA 0~3 0
F26 TRAP(TV) 1chip TRAP-FINE 0~3 2
F27 TRAP(AV) 1chip TRAP-FINE 0~3 2
F28 H-FREE 1chip H-FREE 0 / 1 0
F29 1W(TV) 1chip V.Window 0 / 1 0
F30 1W(AV) 1chip V.Window 0 / 1 0
F31 YLPF 1chip YSW-LPF 0 / 1 1
F32 BS-D 1chip BS-DISCHARGE 0~3 0
F33 BS-C 1chip BS-CHARGE 0~3 0
F34 SL(TV) 1chip S-SLICE DOWN 0~3 0
F35 SL(AV) 1chip S-SLICE DOWN 0~3 0
F36 SL(YUV) 1chip S-SLICE DOWN 0~3 0
F37 AFC2 1chip AFC2-G 0 / 1 0
F38 VD(TV) 1chip Vsync-Det 0 / 1 0
F39 VD(AV) 1chip Vsync-Det 0 / 1 0
F40 AS(TV) 1chip Auto-Slice 0 / 1 0
F41 AS(AV) 1chip Auto-Slice 0 / 1 0
F42 AS(YUV) 1chip Auto-Slice 0 / 1 0
F43 FBP(TV) 1chip FBP Vth 0 / 1 0
F44 FBP(AV) 1chip FBP Vth 0 / 1 0
F45 FBP(YUV) 1chip FBP Vth 0 / 1 0
F46 C.Clip Level 1chip C.Clip Level 0 / 1 0
F47 PSW MTS PSW 0 / 1 0
F48 FAO-VOL MTS VOL 0~63 60
F49 CP PLL CP 0 / 1 0
F50 CC LEVEL MICON 0 / 1 0
F51 OSD POS MICON 0 / 1 0
F52 OFFSET-ADJ-COL 1 chip COLOR -32~32 0
F53 OFFSET-ADJ-TINT 1 chip TINT -32~32 0
F54 OFFSET-ADJ-TINT-YUV 1 chip BASEBAND-TINT -32~32 0

10
21FL91
Option Mode Items
Check Mode
Micron mask version, software version and ROM correction function status are displayed in check mode.
No ITEM 0 1 DEFAULT
O01 DEM0 Without DEMO With DEMO 1
O02 DOWNLOAD Without V-CHIP OP With V-CHIP OP 1
O03 V-CHIP Without V-CHIP With V-CHIP 1
O04 SPEAKER Without SPEAKER With SPEAKER 1
O05 FAO Without FAO With FAO 1
O06 P.PREF Without P.PREF With P.PREF 1
O07 UNIV+ Without UNIV+ With UINIV+ 1
O08 VIEW TIMER Without VIEW TIMER With VIEW TIMER 1
O09 EZ-SETUP EZ-SETUP AUTO PRESET 1
O10 PON-CH Without POWER-ON With POWER-ON 1
O11 FAV-COL FAV-COL COL-TEMP 1
O12 COMPONENT Without COMPONENT With COMPONENT 1
O13 AV Without AV With AV 1
O14 AV2 AV1 system AV2 system 1
O15 MTS Without MTS With MTS 1
O16 TONE-CTRL Without S-ADJ With S-ADJ 1
O17 AUTO-OFF Without AUTO-OFF With AUTO-OFF 1
O18 INIT-LANG ENGLISH SPANISH 0
O19 SETUP-FLAG NO SETUP AUTO SETUP 1
O20 FR.AV (Front, 2
Rear AV)
3: Display "FRONTA/V INPUTS" and
"REAR A/V INPUTS" in DEMO mode.
2: Display "FRONTA/V INPUTS" only in
DEMO mode.
1: Display "REAR A/V INPUTS" only in
DEMO mode.
0: No display of above lines in DEMO mode.

11
21FL91
ADJUSTMENT METHOD
Caution:to get into the service mode, one of the ways is press direct key for service items. the other ways
is short the main chassis JA309 and JA402
There is three stage of Service Mode data
First stage data from V01 ~ M06
to go into second stage of service mode data, press MENU key
Second stage data from F01 ~ F54
to go into third stage of service mode data, press MENU key twice
Third stage data from 001 ~ 020
Below is the contents of these data
First Stage
Auto Adjustment Item
1. H-VCO (Currently need manual adj)
2. RF-AGC
3. PIF-VCO
4. MTS-FILTER
Data Service Mode Function Range Default Data
V01 SUB-PICTURE CONTRAST 0~127 127
V02 SUB-TINT TINT 0~127 64
V03 SUB-COLOR COLOR 0~127 64
V04 SUB-BRIGHT BRIGHT 0~255 128
V05 SUB-SHARP VIDEO-TONE 0~63 32
V06 V-SHIFT V-SHIFT 0~7 4
V07 H-SHIFT H-PHASE 0~31 16
V08 RF-AGC RF-DELAY 0~127 127
V09 V-SIZE V-SIZE 0~63 32
V10 PIF-VCO VIF-VCO 0~63 32
V11 R-CUTOFF R-CUTOFF 0~255 127
V12 G-CUTOFF G-CUTOFF 0~255 127
V13 B-CUTOFF B-CUTOFF 0~255 127
V14 R-DRIVE R-DRIVE 0~127 64
V15 B-DRIVE B-DRIVE 0~127 64
V16 SUB-COLOR(YUV) COLOR 0~127 64
V17 SUB-TINT(YUV) BASEBAND-TINT 0~127 64
V18 CC-POS CC-POSITION 0~255 32
V19 SCREEN CUT OFF CUT OFF 0
V20 SUB-VOL A-ATT 0~127 127
V21 H-VCO H-VCO 0~7 4
M01 MTS-ATT ATT (MTS) 0~15 10
M02 MTS-VCO VCO (MTS) 0~63 32
M03 MTS-FILTER FILTER (MTS) 0~63 28
M04 MTS-WIDEBAND WIDEBAND (MTS) 0~63 27
M05 MTS-SPECTRAL SPECTRAL (MTS) 0~63 32
M06 SUB-VOL VOL (MTS) 0~63 63

12
21FL91
Data Service Mode Function Range Default Data
F01 VIDEO TONE -GAIN (TV) V-TONE 0/1 0
F02 VIDEO TONE -GAIN (AV V-TONE 0/1 0
F03 VIDEO TONE -GAIN(YUV) V-TONE 0/1 0
F04 ABCL ABCL 0/1 0
F05 BS BS-OFF 0/1 0
F06 ABCL-G ABCL-G 0/1 0
F07 SHP-AV VIDEO-TONE (OFFSET) -16~+16 0
F08 SHP-YUV VIDEO-TONE (OFFSET) -16~+16 0
F09 SHP-CLIP EXTRGB-CLIP 0/1 0
F10 E-SAVE CONTRAST(OFFSET) 0~63 30
F11 FAO-VOL A-ATT 0~127 120
F12 PIF-G VIF-GAIN 0~7 4
F13 Y-DELAY(TV) Y-DELAY 0~7 0
F14 Y-DELAY(AV) Y-DELAY 0~7 0
F15 Y-DELAY(YUV) Y-DELAY 0~7 0
F16 TINT-AV TINT(OFFSET) -32~+32 0
F17 COL-AV COLOR(OFFSET) -32~+32 0
F18 R-DRI(R2) R-DRI(OFFSET) -32~+32 0
F19 R-DRI( R) R-DRI(OFFSET) -32~+32 0
F20 R-DRI(B) R-DRI(OFFSET) -32~+32 0
F21 B-DRI(R2) B-DRI(OFFSET) -32~+32 0
F22 B-DRI( R) B-DRI(OFFSET) -32~+32 0
F23 B-DRI(B) B-DRI(OFFSET) -32~+32 0
F24 V-FREE V-FREE 0/1 0
F25 GAMMA GAMMA 0~3 0
F26 TRAP(TV) TRAP-FINE 0~3 2
F27 TRAP(AV) TRAP-FINE 0~3 2
F28 H-FREE H-FREE 0/1 0
F29 1W(TV) V.WINDOW 0/1 0
F30 1W(AV) V.WINDOW 0/1 0
F31 YLPF YSW-LPF 0/1 1
F32 BS-D BS-DISCHARGE 0~3 0
F33 BS-C BS-CHARGE 0~3 0
F34 SL(TV) S-SLICE DOWN 0~3 0
F35 SL(AV) S-SLICE DOWN 0~3 0
F36 SL(YUV) S-SLICE DOWN 0~3 0
F37 AFC2 AFC2-G 0/1 0
F38 VD(TV) VSYNC-DET 0/1 0
F39 VD(AV) VSYNC-DET 0/1 0
F40 AS(TV) AUTO-SLICE 0/1 0
F41 AS(AV) AUTO-SLICE 0/1 0
F42 AS(YUV) AUTO-SLICE 0/1 0
F43 FBP(TV) FBP VTH 0/1 0
F44 FBP(AV) FBP VTH 0/1 0
F45 FBP(YUV) FBP VTH 0/1 0
F46 C.CLIP LEVEL C.CLIP LEVEL 0/1 0
F47 PSW PSW 0/1 0
F48 FAO-VOL VOL 0~63 60
F49 CP CHARGE PUMP 0/1 0
F50 CC LEVEL CC LEVEL 0/1 0
F51 OSD POS OSD POS 0/1 0
F52 COL OFFSET (SUR →NOR) 0
F53 TINT OFFSET (SUR →NOR) 0
F54 TING-YUV TINT-YUV(OFFSET) 0
Second Stage

13
21FL91
Third Stage
*
**POWER ON BY CH-UP/CH-DOWN KEY
Data Service Mode DATA="0" DATA="1" Default Data
001 DEMO DEMO DISABLE ON 1
002 DOWNLOAD V-CHIP OP DISABLE ON 1
003 V-CHIP V-CHIP DISABLE ON 1
004 SPEAKER SPEAKER DISABLE ON 1
005 FAO FAO DISABLE ON 1
006 P.PREF P.REF DISABLE ON 1
007 UNIV+ UNIV+ DISABLE ON 1
008 VIEW TIMER VIEW TIMER DISABLE ON 1
009 EZ-SETUP EZ-SETUP AUTO PRESET 1
010 *PON-CH POWER-ON DISABLE ON 1
011 FAV-COL FAV-COL COL-TEMP 1
012 COMPONENT COMPONENT DISABLE ON 1
013 AV AV DISABLE ON 1
014 AV2 AV2 DISABLE ON 1
015 MTS MTS DISABLE ON 1
016 TONE-CTRL S-ADJ DISABLE ON 1
017 AUTO-OFF AUTO-OFF DISABLE ON 1
018 INIT-LANG ENGLISH SPANISH 0
019 SETUP-FLAG NO SET UP AUTO SET UP 1
020 AV-FR "0"=NO AV "1"=REAR "2"=FRONT "3"=REAR & FRONT 2

14
14-1 14-2
21FL91
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
BUS OPTION FOR THIRD STAGE SERVICE DATA
FUNCTION
001 002 003 004 005 006 007 008 009 010
DEMO DOWNLOAD V-CHIP SP FAO P.PREF UNIV+ VIEW EZ PON-CH
21FL91 1 0 0 1 1 1 1 1 0 0
DEF “0”=DISABLE “1”=ENABLE
009 →“0”=EZ-SETUP “1”=AUTO PRESET
BUS OPTION FOR THIRD STAGE SERVICE DATA
FUNCTION
011 012 013 014 015 016 017 018 019 020
FAV-COL COMP AV AV2 MTS TONE AUTO LAN SETUP AV-FR
21FL91 1 1 1 1 1 1 1 1 1 3
DEF 011 →”0”=FAV-COL “1”=COL-TEMP
018 →“0”=ENGLISH “1”=SPANISH 019 →“0”=NO SET UP “1”=AUTO SETUP
OPTION SET UP
REFER AS BELOW STEP RANGE REFER AS BELOW
– – –
21FL91 OSD CHECKING
DATA SETUP FOR FIRSTAND SECOND STAGE SERVICE DATA
DATA SETUP FOR FIRSTAND SECOND STAGE SERVICE DATA
BUS SET UP
REFER AS BELOW STEP RANGE REFER AS BELOW
– – –
21FL91 OSD CHECKING
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION
OUTPUT
ADJUSTMENT PROCEDURE
FUNCTION V05 F13 F14 F16 F17 F30 F34 F38 F40 F49 F18
SHARP Y-DL(TV)
Y-DL(AV) TINT-AV COL-AV 1W(AV)
SL(TV) VD(TV) AS(TV) CP
R-D(R2)
21FL91 50 5 2 -7 4 1 1 1 1 1 +8
DEF
FUNCTION F19 F20 F21 F22 F23 F52 F53 F35 F41 F48 F54
R-D(R)
R-D(B) B-D(R2) B-D(R) B-D(B) C-OF
TI-OF SL(AV) AS(AV)
FAO-VOL
TINT-YUV
21FL91 +3 -2 -18 -8 +6 +10 +8 1 1 58 -8
DEF

15
21FL91
15-1 15-2
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
H-POSITION
V07 STEP RANGE 0-31
I2C BUS CONTROL
OPTION SET UP, BUS SET UP, CRT-PURITY US 4 CH LION HEAD (MONOSCOPE) AC 220V, MEXICO MAGNETIC FIELD CONFIRMATION BY CRT SCREEN
1. ADJUSTTHEV07 BUSDATATOHAVEABALANCE POSITION TOSPEC
OF A=B.
2. IF CANNOTMAKE IT TO A=B,ADJ FROM THE BEST POINTSO THAT
BSLIDELY SMALLER THAN A
[CHECKING SPEC] LEFT AND RIGHT SYMMETRICAL
AB
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
ADJUST THE V09 BUS DATA UNTILL THE OVERSCAN BECOME AS SPECIFIED BELOW. CAUTION: - PLEASE AGING TV MORE THAN 10 MINUTES BEFORE ADJUSTMENT.
V-SIZE
V09 STEP RANGE 0~63
I2C CONTROL
OPTION SET UP, BUS SET UP, CRT PURITY, V-PHASE, +B ADJUST US 4 CH LION HEAD AC 220V CONFIRMATION BY CRT SCREEN
[CHECKING SPEC] OVERSCAN 10 ±2.5%

16
16-1 16-2
21FL91
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
V-PHASE
V06 STEP RANGE 0-7
I2C CONTROL
OPTION SET UP, BUS SET UP, CRT-PURITY US 4 CH LION HEAD (MONOSCOPE PATTERN) 220V, RF INPUT, ZERO MAGNETIC FIELD CONFIRMATION ON CRT SCREEN
ADJUST V06 BUS DATA TO HAVE MOST ACCEPTABLE VERTICAL PO- SITION. THE MONOSCOPE PATTERN SHOULD BE BALANCE IN VERTICAL POSITION NOTE: THE DATA FOR V06 LIMIT AT <= 04, EVEN POSITION GOOD ENOUGH
[CHECKING CONFIRMATION]
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
1) BY SELECTING THE V18, BOX BLK TEXT WILL BE APPEARED. 2) ADJUST THE V18 BUS DATA TO HAVE A BALANCE POSITION TO
SPEC OF A=B.
CLOSED CAPTION SET UP
V18 STEP RANGE 0~255
I2C CONTROL
OPTION SET UP, BUS SET UP US 4 CH LION HEAD AC 220V CONFIRMATION ON CRT DISPLAY.
[CHECKING SPEC] LEFT AND RIGHT SYMMETRICAL
AB
TEXT BOX BLK

17
21FL91
17-1 17-2
H-VCO
V21 STEP RANGE 0-7
I2C CONTROL
OPTION SET UP, BUS SET UP NO SIGNAL (RASTER) CONDITION AC 220V IC 801 PIN 11
(MANUAL ADJ) 1) GO TO SERVICE MODE, 2) GO TO SERVICE DATA V21,ADJ UNTIL FREQAS BELOW (SELF ADJ) 1) GO TO SERVICE MODE,BY SELECTING THE SERVICE DATA V21 2) PRESS THE R/C TO OPERATE AUTO H-VCO,OSDAPPEAR "OK" AT
SCREEN
3) IF APPEAR "NG" PLS REPEAT STEP2
[CHECKING SPEC] FREQ = 15.735 ±0.2 KHz
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
(AT SELF ADJUSTMENT MODE) 1) GO INTO SERVICE MODE, BY SELECTINGTHE SERVICE DATAV10 2) PRESS THE R/C FOR AUTO PIF-VCO KEY, OSD APPEAR “OK” AT
SCREEN
3) IF APPEAR “NG” PLS REPEAT STEP2 (AT MANUAL ADJUSTMENT MODE) 1) GO INTO SERVICE MODE, BY SELECTINGTHE SERVICE DATAV10 2) ADJUSTTHE DATA UP/DOWN UNTILIC801 PIN 2 VOLTAGE BECOME
AS SPECIFIED BELOW
PIF-VCO
V10 STEP RANGE 0~63
I2C CONTROL
OPTION SET UP, BUS SET UP NO SIGNAL (RASTER) CONDITION AC 220V
CONFIRMATION ON CRT DISPLAY (AUTO), IC801 PIN 2 VOLTAGE (MANUAL).
[CHECKING SPEC] 2.5 ±0.5 V DC (CHECKING SPEC : 2.50 ±1.5V)

18
18-1 18-2
21FL91
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
RF-AGC
V08 STEP RANGE 0-127
I2C CONTROL
OPTION SET UP, BUS SET UP US10CH HALF COLOR BAR RF INPUT FIELD STRENGTH 53dBµV (FIX) TUNER AGC TERMINAL (TP 201) OR CRT DISPLAY CONFIRMATION
(AT SELF ADJUSTMENT MODE) 1. GO TO SERVICE MODE 2. GO TO SERVICE DATA V08, PRESS R/C TO OPEARATE AUTO-AGC
KEYAND CONFIRM THE OK DISPLAY ON THE SCREEN.
3. IFAPPEAR NG PLS REPEAT STEP 2 AGAIN. (AT MANUAL ADJUSTMENT MODE) 1. ADJUST THE V08 BUS DATA UNTILAGC TERMINAL VOLTAGE BE-
COME MAXIMUM, THEN DROP 0.1V BELOW MAXIMUM VOLTAGE.
2. CHANGE THE ANTENNA INPUT SIGNAL TO 63-67 dBµV, AND MAKE
SURE THERE IS NO NOISE
3. CHANGE THEANTENNAINPUT SIGNALTO 90-95 dBµV TO BE SURE
THAT THERE IS NO CROSS MODULATION BEAT.
[CHECKING SPEC] MAX - 0.1V dc
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
1) IN SERVICE MODE, SET V04&V11&V12&V13 TO 127; V14&V15 TO
64, GET IN Y-MUTE BY R/CAND SET V19 TO “1”, PICTUREAPPEAR IN CUT-OFF CONDITION
2) ADJUST THE SCREEN SO THAT CUT-OFF LINE APPEAR IN LOW
BRIGHT, THEN JUDGE THAT WHETHER THE CUT-OFF LINEAPPEAR IN RED OR GREEN OR BLUE COLOR, IN THIS CONDITION V11=R- CUTOFF, V12=G-CUTOFF, V13=B-CUTOFF, FIX THE DATA OF THE COLOR APPEAR IN CUTOFF LINE AND USE R/C TO ADJUST THE OTHER TWO CUT-OFF DATA SO THAT CUT-OFF LINE COLOR BE- COME WHITE.
3) TURN THE SCREEN VR OF FBT SO THAT CUT-OFF LINE JUST DIS-
APPEAR AND USE R/C TO SET V19 TO “0”, NEXT DISABLE THE Y- MUTE SO THAT PICTURE APPEAR IN NORMAL MODE.
SCREEN
V11,V12,V13 STEP RANGE 0-255
I2C CONTROL
OPTION SET UP, BUS SET UP WINDOW PATTERN OR US4CH LION HEAD
220V
CONFIRMATION ON CRT DISPLAY
[VOLTAGE CONFIRMATION]

19
21FL91
19-1 19-2
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
WHITE BALANCE
V14,V15,V11,V12,V13 STEP RANGE 0-127, 0~255
I2C BUS CONTROL
OPTION SET UP, BUS SET UP, SCREEN 23CH 501RE WINDOW PATTERN 220V CRT SCREEN DISPLAY.
1) WHITE (HIGH BEAM)
FIRST LET THE GUN POINT AT BLACK POSITION (AS DRAWING
ATTACH), ADJ V04 UNTIL BRIGHTNESSY BECOME 5 cd/m2, THEN LET THE GUN POINT AT WHITE POSITION (AS DRAWINGATTACH), ADJUST V01 UNTIL BRIGHTNESS Y BECOME 150 cd/m2, ADJUST THE BUS DATA OF V14 (R DRIVE), V15(B DRIVE) UNTIL THE AXIS OF COLOR TEMPERATURE BECOME X=0.273,Y=0.280
2) BLACK (LOW BEAM)
LET THE GUN POINT AT BLACK POSITION, IF THE VALUE SHIFTED
AWAY FROM THE DATAADJUSTED IN STEP 1),ADJUSTAGAIN THE TWO SERVICE DATA WHICH HAVE CHOSEN AT SCREEN ADJUST SO THAT TO OBTAIN THE SIMILAR AXIS AS ABOVE.
*WARNING: DO NOT DISTURB THE MINI STEP GUN DATA DURING
THIS ADJUSTMENT.
**REPEAT STEP 1), 2) TO GET A REGULATED POSITION.
[CHECKING CONFIRMATION] X=0.273, Y=0.280 (11,600°K + 1 MPCD)
BLACK
US14
WHITE
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
1) LETTHE GUN POINTAT BLACK POSITION (ASATTACH DRAWING),
ADJUST V04 BUS DATA UNTIL BRIGHTNESS Y=0.5 cd/m2, THEN STEP DOWN MORE 4 STEP
SUB-BRIGHT
V04 STEP RANGE 0-255
I2C CONTROL
OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE WINDOW PATTERN 220V CRT SCREEN DISPLAY.
[VOLTAGE CONFIRMATION] BRIGHTNESS Y=0.5 cd/m2, THEN STEP DOWN MORE 4 STEP
BLACK US14

20
20-1 20-2
21FL91
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
SUB-PICTURE
V01 STEP RANGE 0-127
I2C BUS CONTROL
OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE, SUB-BRIGHTNESS
WINDOW PATTERN 220V CRT SCREEN DISPLAY.
1) LET THE GUN POINTAT WHITE POSITION (AS ATTACH DRAWING),
ADJUST V01 BUS DATA UNTIL BRIGHTNESS Y=150 cd/m2.
NOTE: ALLOWABLE DATA FOR V01 IS >= 90, EVENY CAN’T MATCH
THE SPEC
[VOLTAGER CONFIRMATION] BRIGHTNESS Y=150 cd/m2
US14
WHITE
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
1) GET IN Y-MUTE FUNCTION BY R/C. 2) ADJUST THE V02 BUS DATA TO GETA WAVEFORM AS BELOW. 3) DISABLE THE Y-MUTE **PLS TAKE NOTE THAT SERVICE MODE DATA F53 NEED TO SET +8
SUB-TINT
V02 STEP RANGE 0-127
I2C CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC US 10 CH HALF COLOR BAR PATTERN 220V B-AMP TR BASE (TP853) CONFIRRM WITH OSCILLOSCOPE
[CONFIRMATION]
B-AMP BASE (TP853) MUST BE IN STEPPING LEVEL