Toshiba 21E88 User manual

SERVICE MANUAL
FILE NO. SM-CTV-O-081
COLOR TELEVISION
SERVICE MANUAL
MODELNO. 21E88
CHASSIS NO. CN-18EA
Please read this manual carefully before service.

SERVICE MANUAL
TABLE OF CONTENTS
SPECIFICATIONS........................................................................................................... 1
SAFETY INSTRUCTIONS AND MAINTENANCE....................................... 2
X-RAY RADIATION PRECAUTION ........................................................................................ 2
SAFETY PRECAUTION .......................................................................................................... 2
PRODUCT SAFETY NOTICE ................................................................................................. 3
SAFETY SYMBOL DESCRIPTION ......................................................................................... 4
MAINTENANCE ...................................................................................................................... 4
ADJUSTMENTS................................................................................................................ 5
SET-UP ADJUSTMENTS........................................................................................................ 5
CIRCUIT ADJUSTMENTS ...................................................................................................... 8
CONTROL BUTTONS................................................................................................. 23
CONTROL BUTTONS .......................................................................................................... 23
REMOTE CONTROL ............................................................................................................ 24
BASIC FUNCTIONS......................................................................................................... 25
STRUCTURE AND CHASSIS FUNCTION DESCRIPTION................ 28
STRUCTURE BLOCK DIAGRAM ......................................................................................... 28
BLOCK DIAGRAM FOR SUPPLY VOLTAGE SYSTEM ....................................................... 29
CHASSIS DESCRIPTION..................................................................................................... 30
SERVICE DATA.............................................................................................................. 31
TECHNICAL DATA OF KEY ICS .......................................................................................... 31
SERVICE DATA OF KEY ICS............................................................................................... 55
REPLACEMENT OF PARTS.................................................................................. 60
APPENDIX
1. CIRCUIT DIAGRAMS
2. FINAL ASSEMBLY DIAGRAMS
3. FIND WIRING DIAGRAMS
4. PRINTED CIRCUIT BOARD LAYOUTS

SERVICE MANUAL
SPECIFICATIONS
Model Number 21E88
Color system PAL, NTSC3.58, NTSC4.43
RF system
Sound system B/G, M, D/K, I
Video system PAL4.43, NTSC3.58, NTSC4.43 (50/60Hz)
Programs preset 236 (0-235)
Antenna input 75Ω(unbalanced)
Picture tube
Effective screen dimensions
(Approx.)
406×305mm
Audio output (THD≤7%) Main channel: 3W+3W
Power source 220V ~, 50Hz
Weight (Approx.) 23 Kg
Dimensions
(W×H×D) (Approx.)
585×457×484mm
Rated power consumption 87W
Designs and specifications are subject to change without notice.
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SERVICE MANUAL
SAFETY INSTRUCTIONS AND MAINTENANCE
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “ X-RAY RADIATION
PRECAUTION ” , “ SAFETY PRECAUTION ” AND “ PRODUCT SAFETY NOTICE ” INSTRUCTION
BELOW.
X-RAY RADIATION PRECAUTION
1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit
X-ray radiation as result of excessive EHT voltage. The maximum EHT voltage permissible in any
operating circumstances must not exceed the rated value. When checking the EHT, use the High
Voltage Check procedure in this manual using an accurate EHT voltmeter.
2. The only source of X-RAY radiation in this TV is the CRT. The TV minimizes X-RAY radiation,
which ensures safety during normal operation. To prevent X-ray radiation, the replacement CRT
must be identical to the original fitted as specified in the parts list.
3. Some components used in this TV have safety related characteristics preventing the CRT from
emitting X-ray radiation. For continued safety, replacement component should be made after
referring the PRODUCT SAFETY NOTICE below.
4. Service and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT
anode. So ensure that the maximum EHT voltage does not exceed the rated value after service
and adjustment.
SAFETY PRECAUTION
WARNING: REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.
1. The TV has a nominal working EHT voltage. Extreme caution should be exercised when working
on the TV with the back removed.
1.1 Do not attempt to service this TV if you are not conversant with the precautions and procedures for
working on high voltage equipment.
1.2 When handling or working on the CRT, always discharge the anode to the TV chassis before
removing the anode cap in case of electric shock.
1.3 The CRT, if broken, will violently expel glass fragments. Use shatterproof goggles and take
extreme care while handling.
1.4 Do not hold the CRT by the neck as this is a very dangerous practice.
2. It is essential that to maintain the safety of the customer all power cord forms be replaced exactly
as supplied from factory.
3. Voltage exists between the hot and cold ground when the TV is in operation. Install a suitable
isolating transformer of beyond rated overall power when servicing or connecting any test
equipment for the sake of safety.
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SERVICE MANUAL
4. When replacing ICs, use specific tools or a static-proof electric iron with small power (below 35W).
5. Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to
avoid electronic gun magnetized and decrement in convergence of the CRT.
6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control buttons,
switch, insulating sleeve, shielding cover, isolating resistors and capacitors, are installed on the
original place.
7. Replace blown fuses within the TV with the fuse specified in the parts list.
8. When replacing wires or components to terminals or tags, wind the leads around the terminal
before soldering. When replacing safety components identified by the international hazard symbols
on the circuit diagram and parts list, it must be the company-approved type and must be mounted
as the original.
9. Keep wires away from high temperature components.
PRODUCT SAFETY NOTICE
CAUTION: FOR YOUR PROTECTION, THE FOLLOWING PRODUCT SAFETY NOTICE
SHOULD BE READ CAREFULLY BEFORE OPERATING AND SERVICING THIS TV SET.
1. Many electrical and mechanical components in this chassis have special safety-related
characteristics. These characteristics are often passed unnoticed by a visual inspection and the
X-ray radiation protection afforded by them cannot necessarily be obtained by using replacements
rated at higher voltages or wattage, etc. Components which have these special safety
characteristics in this manual and its supplements are identified by the international hazard
symbols on the circuit diagram and parts list. Before replacing any of these components read the
parts list in this manual carefully. Substitute replacement components which do not have the same
safety characteristics as specified in the parts list may create X-ray radiation.
2. Do not slap or beat the cabinet or CRT, since this may result in fire or explosion.
3. Never allow the TV sharing a plug or socket with other large-power equipment. Doing so may result
in too large load, causing fire.
4. Do not allow anything to rest on or roll over the power cord. Protect the power cord from being
walked on, modified, cut or pinched, particularly at plugs.
5. Do not place any objects, especially heavy objects and lightings, on top of the TV set. Do not install
the TV near any heat sources such as radiators, heat registers, stove, or other apparatus that
produce heat.
6. Service personnel should observe the SAFETY INSTRUCTIONS in this manual during use and
servicing of this TV set. Otherwise, the resulted damage is not protected by the manufacturer.
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SERVICE MANUAL
SAFETY SYMBOL DESCRIPTION
The lightning symbol in the triangle tells you that the voltage inside this product may
be strong enough to cause an electric shock. Extreme caution should be exercised
when working on the TV with the back removed.
This is an international hazard symbol, telling you that the components identified by
the symbol have special safety-related characteristics.
FDA This symbol tells you that the critical components identified by the FDA marking have
special safety-related characteristics.
UL This symbol tells you that the critical components identified by the UL marking have
special safety-related characteristics.
C UL This symbol tells you that the critical components identified by the C-UL marking
have been evaluated to the UL and C-UL standards and have special safety-related
characteristics.
VDE
This symbol tells you that the critical components identified by the VDE marking have
special safety-related characteristics.
MAINTENANCE
1. Place the TV set on a stable stand or base that is of adequate size and strength to prevent it from
being accidentally tipped over, pushed off, or pulled off. Do not place the set near or over a
radiator or heat register, or where it is exposed to direct sunlight.
2. Do not install the TV set in a place exposed to rain, water, excessive dust, mechanical vibrations or
impacts.
3. Allow enough space (at least 10cm) between the TV and wall or enclosures for proper ventilation.
4. Slots and openings in the cabinet should never be blocked by clothes or other objects.
5. Please power off the TV set and disconnect it from the wall immediately if any abnormal condition
are met, such as bad smell, belching smoke, sparkling, abnormal sound, no picture/sound/raster.
Hold the plug firmly when disconnecting the power cord.
6. Unplug the TV set from the wall outlet before cleaning or polishing it. Use a dry soft cloth for
cleaning the exterior of the TV set or CRT screen. Do not use liquid cleaners or aerosol cleaners.
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SERVICE MANUAL
ADJUSTMENTS
SET-UP ADJUSTMENTS
The following adjustments should be made when a complete realignment is required or a new picture
tube is installed.
Perform the adjustments in the following order:
1. Color purity
2. Convergence
3. White balance
Notes:
①The purity/convergence magnet assembly and rubber wedges need mechanical positioning.
②For some picture tubes, purity/ convergence adjustments are not required.
1. Color Purity Adjustment
Preparation:
Before starting this adjustment, adjust the vertical sync, horizontal sync, vertical amplitude and
focus.
1.1 Face the TV set north or south.
1.2 Connect the power plug into the wall outlet and turn on the main power switch of the TV set.
1.3 Operate the TV for at least 15 minutes.
1.4 Degauss the TV set using a specific degaussing coil.
1.5 Set the brightness and contrast to maximum.
1.6 Counter clockwise rotate the R /B low brightness potentiometers to the end and rotate the green
low brightness potentiometer to center.
1.7 Receive green raster pattern signals.
1.8 Loosen the clamp screw holding the deflection yoke assembly and slide it forward or backward to
display a vertical green zone on the screen. Rotate and spread the tabs of the purity magnet
around the neck of the CRT until the green zone is located vertically at the center of the screen.
1.9 Slowly move the deflection yoke assembly forward or backward until a uniform green screen is
obtained.
1.10 Tighten the clamp screw of the assembly temporarily. Check purity of the red raster and blue
raster until purities of the three rasters meet the requirement.
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Yok
Fig. 1
2. Convergence Adjustment
Preparation:
Before attempting any convergence adjustment, the TV should be operated for at least 15 minutes.
2.1 Center convergence adjustment
2.1.1 Receive dot pattern.
2.1.2 Adjust the brightness/contrast controls to obtain a sharp picture.
2.1.3 Adjust two tabs of the 4-pole magnet to change the angle between them and red and blue
vertical lines are superimposed each other on the center of the screen.
2.1.4 Turn both tabs at the same time keeping the angle constant to superimpose red and blue
horizontal on the center of the screen.
2.1.5 Adjust two tabs of the 6-pole magnet to superimpose red/blue line and green line.
2.1.6 Remember red and blue movement. Repeat steps 2.1.3～2.1.5 until optimal convergence is
obtained.
2.2 Circumference convergence adjustment
2.2.1 Loosen the clamp screw holding the deflection yoke assembly and allow it tilting.
2.2.2 Temporarily put the first wedge between the picture tube and deflection yoke assembly. Move
front of the deflection yoke up or down to obtain better convergence in circumference. Push the
mounted wedge in to fix the yoke temporarily.
2.2.3 Put the second wedge into bottom.
2.2.4 Move front of the deflection yoke to the left or right to obtain better convergence in
circumference.
2.2.5 Fix the deflection yoke position and put the third wedge in either upper space. Fasten the
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SERVICE MANUAL
deflection yoke assembly on the picture tube.
2.2.6 Detach the temporarily mounted wedge and put it in either upper space. Fasten the deflection
yoke assembly on the picture tube.
2.2.7 After fastening the three wedges, recheck overall convergence and ensure to get optimal
convergence. Tighten the lamp screw holding the deflection yoke assembly.
Fig. 2
4-pole Magnet Movement 6-pole Magnet Movement
Center Convergence by Convergence Magnets
Incline the Yoke Up (or Down) Incline the Yoke Right (or Left)
Circumference Convergence by DEF Yoke
Fig.3
3. White Balance Adjustment
Generally, white balance adjustment is made with professional equipment. It’s not practical to get
good white balance only through manual adjustment. For TVs with I2C bus control, change the bus
data to adjust white balance.
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SERVICE MANUAL
CIRCUIT ADJUSTMENTS
Preparation:
Circuit adjustments should be made only after completion of set-up adjustments.
Circuit adjustments can be performed using the adjustable components inside the TV set. For TVs with
I2C bus control, first change the bus data.
1. Degaussing
A degaussing coil is built inside the TV set. Each time the TV is powered on, the degaussing coil
will automatically degauss the TV. If the TV is magnetized by external strong magnetic field,
causing color spot on the screen, use a specific degausser to demagnetize the TV in the following
ways. Otherwise, color distortion will be shown on the screen.
1.1 Power on the TV set and operate it for at least 15 minutes.
1.2 Receive red full-field pattern.
1.3 Power on the specific degausser and face it to the TV screen.
1.4 Turn on the degausser. Slowly move it around the screen and slowly take it away from the TV.
1.5 Repeat the above steps until the TV is degaussed completely.
2. Confirmation and Adjustment for Voltage
Caution: +B voltage has close relation to high voltage. To prevent X-ray radiation, set +B voltage to
the rated value.
2.1 Make sure that the supply voltage is within the range of the rated value.
2.2 Connect a digital voltmeter to the voltage output terminal of the main PCB. Power on the TV and
set the brightness and sub-brightness to minimum. Ensure that the voltage from the main PCB
reads as follows.
2.3 Regulate voltage adjustment components on the power section until the +B the voltage reaches the
rated value.
Table 1
Test Point Voltage (V)
Negative of VD851 118V±2V
Negative of VD852 17V±1V
Negative of VD854 11V±1V
Negative of VD857 14V +1V
-1.5V
Positive of C874 9V±0.5V
Positive of C878 5V±0.5V
Positive of C800 5V±0.25V
Note:
It’s impossible to check the power part separately from the main chassis board as the part is
mounted on the main chassis board. The power components, etc. should be checked for burnout
when power-on. If burned out, do not power on the TV again until the cause is found out.
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SERVICE MANUAL
3. High Voltage Inspection
Measure voltages of test points on the main PCB with the digital voltmeter. Measure the CRT high
voltage with the high-voltage testing equipment and heater voltage with the high-frequency
effective voltmeter. The rated values are shown as below.
Table 2
Test Point Voltage (V)
Negative of VD603 25±1.5V (for BSC6OU FBT only)
27±1.5V (for BSC62V1 FBT only)
Negative of VD855A 195±5.0V
CRT anode 25±1.5KV (for IRICO，SHANGHAI NOVEL, LG, CHUNGHWA，
and THAI CRTs)
27±1.5KV (SAMSUANG，BMCC)
Heater 6.3±0.3Vrms
4. Focus Adjustment
Caution: Dangerously high voltages are present inside the TV. Extreme caution should be
exercised when working on the TV with the back removed.
4.1 After removing the back cover, look for the FBT on the main PCB. There should be a FCB on the
FBT.
4.2 Power on the TV and preheat it for 15 min.
4.3 Receive a normal TV signal. Rotate knob of the FCB until you get a sharp picture.
BeforeAdjusting AfterAdjusting
Fig. 4
5. Safety Inspection
5.1 Inspection for insulation and voltage-resistant
Perform safety test for all naked metal of the TV. Supply high voltage of 3000V AC, 50Hz (limit
current of 10mA) between all naked metal and cold ground. Test every point for 3 sec. and ensure
no arcing and sparking.
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SERVICE MANUAL
5.2 Requirements for insulation resistance
Measure resistance between naked metal of the TV and feed end of the power cord to be infinity
with a DC-500 high resistance meter and insulation resistance between the naked metal and
degaussing coil to be over 20MΩ.
6. SERVICE mode
6.1 To enter the DESIGN/SERVICE mode
Set the volume to 0. Then press and hold the MUTE button on the remote control, and press the
MENU button on the TV to enter the SERVICE mode. In this case, red “S”is displayed on the
upper center of the screen. To exit from the S mode, turn off the TV set by the POWER button on
the remote control.
Caution: The user service mode adjustment can be changed only when service personnel adjust
the whole set data during servicing. As the control data have dramatic effects on functions and
performance of the TV, service personnel should not tell user how to enter the SERVICE mode to
avoid improper data settings.
6.2 Adjustments and bus data (CH08T0603)
Table 3 Function Description for Bus Data
Bit Function Description Status
Bit7.6 Audio system options (available during
auto search and use of AUTO button)
00: B/G 01: I
10: D/K 11: M
Bit5
Bit4
SECAM
INHIBIT
00: SECAM gate pulse width, 2.2 usec
01: 2.0 usec
10: 1.8 usec
11: SECAM demodulation inhibit
Bit3 V MUTE When changing channels:
0:Y-MUTE 1:RGBMUTE
Bit2 SECAM 0:No 1:Yes
Bit1 AUTO2 0: PAL 1: Without PAL
MODE0
Bit0 Power-on modes 0: Memory on 1: Soft on
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SERVICE MANUAL
Bit7 Write-in LOGO 0:No 1:Yes
Bit6 NICAM DK for CHINA 0:No 1:Yes
Bit5
With two sets of AV terminals,
refresh AV terminals ?
0：Yes (Recommended) 1：No
Bit4 Screen saver 0:No 1:Yes
Bit3 M 0:No 1:Yes
Bit2 D/K 0:No 1:Yes
Bit1 I 0:No 1:Yes
MODE1
Bit0 B/G 0:No 1:Yes
Bit7 NO USE
Bit6
Small character processing
program
0: New program (Recommended)
1: Old program
Bit5 RF NTSC options 0:No 1:Yes
Bit4 Power-on message display 1: Yes 0: No (Recommended)
Bit 3 NICAM sound with MDB 0:No 1:Yes
Bit 2 Mono system 1:Yes 0：No
Bit 1 Single language 1:Yes 0：No
MODE2
Bit.0
TA1343 woofer or MDB output
mode options
0: Mono output 1: Overlapped to main
channel（Recommended）
BIT 7 Childlock vertical bug processing 0: Yes (Recommended) 1:No
BIT 6 Horizontal AFC bug processing 0: Yes (Recommended) 1:No
BIT 5 DVD option 1: No 0: Yes (Recommended)
MODE3
BIT.4
Step length setting for lighting up
gradually during power-on
1: Large step (Recommended) 0：Small step
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SERVICE MANUAL
BIT 3
Option bit for default language by
AUTO button and initialization
0: Chinese 1: English
BIT 2 PWM output option 0: No 1: Yes
BIT 1 Instant on 1:Yes 0：No
BIT 0 AV Switch 4053 option 0:No 1:Yes
BIT 7
Audio processing IC (SOUND
menu) 0:No 1:Yes
BIT 6 Woofer option in SOUND menu 0:No 1:Yes
BIT 5 TA1343 option 0:No 1:Yes
BIT 4 MSP3410G option (NICAM) 0:No 1:Yes
BIT 3 NJW1161 option (SRS IC) 0:No 1:Yes
BIT 2
NJW1160 option (BBE IC & SRS
IC) 0:No 1:Yes
BIT 1 NJW1137 option (BBE IC) 0:No 1:Yes
MODE4
BIT 0 Soft IIC option 0:No 1:Yes
Bit 7 No use
Bit 6 VCO adjustments
0: PIF VCO functions (PIFVCO = 10) during auto
search and search；
1: PIFVCO = 10 during turn-on，and PIFVCO = 00
in Normal mode
Bit 5 No use
Bit 4 Large-amplitude AFT switch when no
signal
1:Off 0:On
OPT
Bit 3 Audio gain switch
0：927mVrms at 25kHz/dev
1：500mVrms at 25kHz/dev
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Bit 2 Y-MUTE 0:No 1:Yes
Bit 1 No use
Bit 0 No use
OSD Horizontal position of OSD
RCUT R cut off
GCUT G cut off
BCUT B cut off
GDRV G drive
BDRV B drive
CNTX Contrast Max.
BRTC Bright center
COLC Color center (for NTSC)
TNTC Tint center (for NTSC)
TNTCAV Tint center in VIDEO mode(for NTSC)
COLP Color center (for PAL)
COLS Color center (for SECAM)
DCOL DVD color
SCOL Sub color center (for DVD)
SCNT Y-sub contrast
CNTC Contrast center
CNTN Contrast Min.
BRTX Bright Max.
BRTN Bright Min.
COLX Color Max.
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COLN Color Min.
TNTX Tint Max.
TNTN Tint Min.
ST3 Sharp center for NTSC 3.58 (TV)
SV3 Sharp center for NTSC 3.58 (VIDEO)
ST4 Sharp center for other color system (TV)
SV4 Sharp center for other color system (VIDEO)
SVD Sub sharp center in DVD
ASSH Asymmetry sharpness
SHPX Sharpness Max.
SHPN Sharpness Min.
TXCX Text RGB in user contrast Max.
RGCN Text RGB in user contrast Min.
Bit 5 Y peak limiter 0: Off 1: On
Bit4 OSD ABL 0:Active 1:Inactive
Bit 3.2 ABL start point
00: ABL start point: 0V 01: -0.15V
10:-0.30V 11:-0.45V
ABL
Bit 1.0 ABL gain
00:-0.2V 01:-0.4V
10:-0.6V 11:-0.8V
Bit 7 Blank SW 0: H, V blanking on 1: H, V blanking off
Bit 6
Bit 5.4 OSD level
00: OSD level, 80 IRE 01: 70IRE
10:60IRE 11:50IRE
DCBS
Bit 3.2 Y gamma
00:Off 01:Ypoint 90 IRE, Gain –3dB
10: 80IRE 11: 70IRE
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Bit 1.0 Black stretch
00: Off 01: Black stretch point, 25 IRE
10: 35IRE 11: 45IRE
Bit 7 Killer off 0: Normal 1: Always killer off
Bit 6 P/N ID
0: PAL/ NTSC killer sensitivity, 1mVpp
1: 10mVpp
Bit 5 C gamma 0: Color gamma off 1: On
Bit 4.3
NTSC matrix
00: USA (105 degree) 01: Japan (93 degree)
10:DVD 11:
CLTO
Chroma
data
(TV&not
M)
CLTM
(TV&M)
CLVD
(DVD)
CLVO
(50hz)
/CLVM
（60hz）
(VIDEO)
Bit 2.1.0 Y DL
000: -40 nsec 001: 0 010: 40 nsec
011: 80 nsec 100: 120 nsec 101: 160 nsec
110: 200 nsec 111: 240 nsec
DEF
BIT0 = 0: V AGC reference depends on YC VCC;
BIT0 = 1: V AGC reference depends on integrated regulator
SECD No use
HPOS 50hz horizontal phase 00: -3usec 10: 01F: +3usec
VP50 V phase (50Hz) 0: V phase delay, 0H 7: 7H
HIT V size 00:-50% 20:0% 3F:50%
HPS Adjusting difference between horizontal centers in PAL and NTSC
VP60 V phase (60Hz) 0: V phase delay, 0H 7: 7H
HITS Adjusting difference between vertical amplitudes in PAL and NTSC
VLIN V-linearity 0:-15% 8: 0% F:15%
VSC V-S correction 0:-16% 8: 0% F:16%
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VLIS Adjusting difference between vertical linear in PAL and NTSC
VSS Shift data of 50 Hz/ 60 Hz Correction
DPC No use
DPCS No use
HIT69 Vertical amplitude in 16:9 mode (PAL)
DPC69 No use
HIT69S Vertical amplitude in 16:9 mode (NTSC)
DPC69S No use
KEY No use
KEYS No use
WID No use
WIDS No use
ECCT No use
ECCB No use
VEHT No use
HEHT No use
SBY Use in SECAM
SRY Use in SECAM
BRTS Sub bright (difference)
RFAGC RF AGC
00: IFmute
01: 65dBu
3F: 100dBu
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BIT 3.2
AFC gain
(in VIDEO mode)
Data Description
Blanking Period Picture Period
0 0 3 1
0 1 4/7 2/7
1 0 4/3 1
1 1 Off Off
HAFC
BIT 1.0
AFC gain
(in TV mode)
Data Description
Blanking Period Picture Period
0 0 3 1
0 1 4/7 2/7
1 0 4/3 1
1 1 Off Off
V01 Volume output data at 1%
V25 Volume output data at 25%
V50 Volume output data at 50%
V100 Volume output data at 100%
Woofer TA1343 woofer Max.
STAT No use
Bit 7
VCO readjust when
position select
0: Enable 1: Disable
Bit 2 N buzz cancel 0: Nyquist buzz cancel, on 1: Off
Bit 1 AFT window SW
0: Wide (-/+ 250kHz) AFT sensitivity, for channel
search
1: Narrow 83kHz) for normal operation
FLG0
Bit 0 Over modulation 0: Normal 1: PIF over modulation switch on
Bit 5 MIX gain 0: SIF 1MHz convert gain, low gain 1: High gain
FLG1
Bit 4 Sync separation. 0: Sync separation level 40% 1: 36%
REFP AKB pulse position
000: 0H 001: 1H 010: 2H 011: 3H
100: 4H 101: 5H 110: 6H 111: 7H
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RSNS R sense 00: x 0 20: x 0.5 3F: x 1.0
GSNS G sense 00: x 0 20: x 0.5 3F: x 1.0
BSNS B sense 00: x 0 20: x 0.5 3F: x 1.0
Bit
6.5.4
PIF frequency
001: 45.75 MHz 011: 38.9 MHz
100: 38.0 MHz
MOD
Bit 1.0 AKB mode
00: AKB off
01: ACB (cutoff: align to targets)
10: ADB (drive: align to targets)
11: AKB (cutoff/drive: align to targets)
Bit 3.2 VCD standby
00: Normal 01: Normal
10: Normal 11: VCD standby
STBY
Bit 1.0 IF standby
00: Normal 01: Normal
10: Normal 11: IF standby
SVM No use
SVM1 No use
SVM3 No use
BIT 3.2 V blanking stop point
00: 310H(50hz) 263H(60hz)
01: 299H(50hz) 254H(60hz)
10: 295H(50hz) 250H(60hz)
11: 291H(50hz) 246H(60hz)
VBLK
BIT 1.0 V blanking start point
00: 23H(50hz) 22H(60hz)
01: 33H (50hz)30H(60hz)
10: 37H (50hz)34H(60hz)
11: 41H(50hz) 38H(60hz)
VCEN Vertical centering 00: -32% 20: 0% 3F: 30%
Bit 1.0 Internal ADC
00: GND 01: R output
10: B output 11: Monitor RF AGC via ADC
UCOM
Bit 5.4.3 Improving NTSC color
signal-to-noise ratio
Available range: 000….011
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