Akai 21CTU91BC User manual

21CTU91BC
CRT COLOR TV SET

SERVICE MANUAL
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product
AKAI 21CTU91BC

- Content ......................................................................................................................... 2
- Bill of Materials ............................................................................................................. 3
- Safety Precautions ....................................................................................................... 7
- TV Block Diagram ......................................................................................................... 8
- Replacement Of Memory IC ......................................................................................... 10
- Service Adjustment ...................................................................................................... 10
- ICs Functional Description .......................................................................................... 18
- Test point Waveforms .................................................................................................. 22
- Purity / Convergence Adjustment ............................................................................... 23
- Explore View Diagram .................................................................................................. 25

SER DESCRIPTION QTY
1 AV6-14 1 XS801
2 CH5B-2.5-2DY 3 XS601 XS602 XS702
3 CH5B-2.5-4DY 4 XS403 XS703 XS704 XS804
4 CH5B-2.5-5DY 1 XS201
5 CH7-10-1DY 1 K9N
6 CH7-10-2DY 2 XS501 XS502
7 CH7-8-10-4DY 1 XS402
8CH9-2.5-2DY-400-CH5B 卧式 1 XS703 XS704
9CH9-2.5-4DY-400-CH5B 立式 1 XS701B
10 CH9-2.5-4DY-400-CH5B-4(带屏蔽)1 XS702B
11 CH9-2.5-4DY-450-CH5B 1 XP902
12 CH9-2.5-4DY-550-CH5B 1 PA102
13 CH9-2.5-5DY-500-CH5B 1 XP901
14 H03VVH2-F0.75mmX2C (250MM) short power cord 1 CN602A
15 Power cord (1.8mm ) 1 CN601A
16 RCA-106A (red) 1 AV3
17 RCA-106A (white) 1 AV2
18 RCA-106A (yellow) 1 AV1
19 RT-1/2W-1KΩ-J 1 R403
20 RT-1/2W-220KΩ-J 1 R501
21 RT-1/2W-220Ω-J 1 R564
22 RT-1/2W-22KΩ-J 1 R487
23 RT-1/4W-1.8KΩ-J 1 R507
24 RT-1/4W-150Ω-J 1 R575
25 RT-1/4W-1KΩ-J 2 R406 R457
26 RT-1/4W-1Ω-J 1 R302
27 RT-1/4W-2.2Ω-J 1 R304A
28 RT-1/4W-2.7KΩ-J 1 R508
29 RT-1/4W-220KΩ-J 1 R401
30 RT-1/4W-27Ω-J 1 R720
31 RT-1/4W-33Ω-J 2 L201 R940
32 RT-1/4W-8.2Ω-J 1 R511
33 RT-1/4W-82Ω-J 1 R562
34 RT-1/6W-1.2KΩ-J 1 R105
35 RT-1/6W-1.5KΩ-J 1 R706B
36 RT-1/6W-1.8KΩ-J 2 R301 R303
37 RT-1/6W-100KΩ-J 5 R313 R554 R716 R802 R837
R110 R111 R208 R209 R210 R212 R306 R307 R710 R711
R712 R714 R715 R823 R824 R825 R826 R838
R109 R211 R576 R602 R611 R612 R614 R702 R723 R811
R812 R815 R817 R821 R836 R912 R922 R932A
40 RT-1/6W-12KΩ-J 1 R207
41 RT-1/6W-150KΩ-J 1 R605
42 RT-1/6W-150KΩ-J 1 R700B
43 RT-1/6W-15KΩ-J 3 R725 R609 R610
R553 R558 R565 R566 R573 R713 R730 R803 R805 R816
R818 R820 R822
45 RT-1/6W-1KΩ-J 1 R719A
46 RT-1/6W-2.7KΩ-J 1 R705B
47 RT-1/6W-220KΩ-J 2 R407 R226
48 RT-1/6W-220Ω-J 6 R101 R309 R806 R913 R923 R933
49 RT-1/6W-22KΩ-J 2 R706 R221
50 RT-1/6W-27KΩ-J 1 R402
51 RT-1/6W-27KΩ-J 1 R701B
52 RT-1/6W-3.3KΩ-J 3 R613 R703 R704
53 RT-1/6W-3.9KΩ-J 1 R704B
54 RT-1/6W-330Ω-J 3 R916A R926 R936
55 RT-1/6W-33KΩ-J 2 R205 R705
56 RT-1/6W-390Ω-J 1 R201
57 RT-1/6W-39KΩ-J 4 R204 R222 R604 R603
58 RT-1/6W-39Ω-J 1 R103
59 RT-1/6W-3KΩ-J 1 R559
R104 R108 R213 R311 R707 R709 R718 R719 R721 R727
R728
61 RT-1/6W-4.7KΩ-J 1 R703B
62 RT-1/6W-4.7Ω-J 1 R217
63 RT-1/6W-470Ω-J 6 R102 R218 R219 R220 R312 R807
64 RT-1/6W-47KΩ-J 3 R106 R726 R606
65 RT-1/6W-47Ω-J 6 R911 R914 R916 R924 R932 R934
RT-1/6W-10KΩ-J
39
13
RT-1/6W-1KΩ-J
44
60 RT-1/6W-4.7KΩ-J 11
CABLE & SOCKET PCB NO.
1838 RT-1/6W-100Ω-J
18
CARBON RESISTOR
6

SER DESCRIPTION QTY PCB NO.
66 RT-1/6W-5.1KΩ-J 1 R414
67 RT-1/6W-680Ω-J 1 R202
68 RT-1/6W-680Ω-J 1 R707B
69 RT-1/6W-680Ω-J 1 R719B
70 RT-1/6W-8.2KΩ-J 1 R702B
71 CT-1KV-1000pF-K(湿封装） 2 C504 C505
72 CT-2KV-1000pF-K 1 C943
73 CT-2KV-471pF-K 1 C553
74 CT-2KV-680pF-K 2 C513 C511
75 CT-500V-1000pF-K 1 C452
76 CT-500V-3900pF-K 2 C451 C510
77 CT-63V-0.01uF-Z 9 C104 C105 C106 C216 C569 C612 C613 C701 C711
78 CT-63V-0.1uF-K 5 C220 C222 C223 C707 C713
79 CT-63V-1000pF-J 6 C202 C203 C205 C206 C213 C214
80 CT-63V-220pF-J 3 C313 C702 C703
81 CT-63V-390pF-J 3 C921 C931 C911
82 CT-63V-560pF-J 1 C225
83 CT7-2E4-400VAC-3300pF-M 1 C517
84 JLC/YDD-600µH 1 L311
85 LG0307-1.2UH-K 1 L101
86 LG0307-10UH-K 6 L202 L203 L701 L702 L703 L704
87 130-208-0011 1 L405
88 3.0mH 1 L404
89 JLC-128-23µH 1 L441
90 BCK-42-09936 1 T501
91 JBC-184-EI19/YDD-EI19 1 T451
92 YDD-UF16/JLF-98-UF16 1 L501
93 BAV21 3 D912 D922 D932
94 FR107 3 D301 D302 D401
95 FR154 2 D510 D513
96 FR157 1 D462
97 FR305/RU4C 2 D452 D559
98 FR309/RU4DS 1 D451
99 HER154/HER204 1 D553
100 HER204 3 D552 D554 D555
101 IN4148 8 D404 D461 D516 D558 D565 D566 D601 D701
102 IN5399/RL207 4 D501 D502 D503 D504
103 RU4A /RU4AM 1 D551
104 CD110-160V-100UF-M 2 C403 C551
105 CD110-16V-100UF-M 5 C208 C219 C221 C224 C568
C101 C108 C102 C103 C204 C217 C708 C603 C710 C801
C802 C804 C805 C806 C807 C808 C809 C813 C814 C815
C816
107 CD110-16V-220UF-M 1 C211
108 CD110-16V-470UF-M 4 C566 C567 C609 C803
109 CD110-16V-47UF-M 5 C563 C564 C565 C709 C712
110 CD110-16V-47UF-M 1 C701B
111 CD110-250V-10UF-M 1 C459
112 CD110-25V-470UF-M 5 C314 C315 C555 C556 C601
113 CD110-35V-100UF-M 1 C304
114 CD110-35V-470UF-M 1 C305
115 CD110-35V-47UF-M 2 C401 C508
116 CD110-50V-0.22UF-M 2 C607 C608
117 CD110-50V-1UF-M 5 C218 C611 C605 C810 C811
118 CD110-50V-4.7UF-M 1 C561
119 CD288H-250V-10UF-M 1 C402
120 CD293-400V-150UF-M 1 C507
121 CD71-50V-10µF-M 1 C312
122 BSC25-0226Q 1 T401
123 RI-1/2W-12MΩ-K 1 R514
124 HS-EW04-60 1 V303
125 HS-PH01-50 1 V451
126 HS-PW01-50 1 N502
127 HS-VS02-70 1 N301
128 HS-WS03-40 1 N601
129 5Q0765RF 1 N502
130 AT24C08/ATMEL24C08 1 N701
131 TDA11136 1 N201
132 PC817B/LTV-817/817B 1 N501
HEATSINK
GLASS ENAMEL RESISTOR
FBT
106 CD110-16V-10UF-M 21
INTEGRATE CIRCUIT
ELECTROLYTE CAPACITOR
DIODE
COIL, IN,LF,TFM
CERAMIC CAPACITOR
6

SER DESCRIPTION QTY PCB NO.
133 STV9325/STV8172A 1 N301
134 TC4052/HEF4052BP 1 N801
135 TDA7266SA 1 N601
136 TL431 1 V551
137 UPC574/KA33V 1 N561
W214 W216 W402 W504 W505 W509 W510 W563 W591 W602
W701 W702 W704 W712 W801 W802 W803 W804 W805 W806
L901
139 12.5MM 10 W502 W205 W204 W561 W593 W606 W709 W714 L301 L403
140 15MM 3 W551 R513 R568
141 17.5MM 2 W406 W405
142 5MM 4 W104 W215 C453 W807
W101 W102 W103 W201 W202 W203 W206 W207 W208 W209
W210 W211 W212 W403 W503 W506 W512 W513 W552 W601
W603 W604 W605 W708 W710 W713 D557 R319 D911 D921
D931
144 LED (RED) 2 LED1 LED2
145 BXGJ-1 2 F501
146 GZS10-108C 1 XS902
147 KDVF38.9H/F38.9H/LBN38.9H 1 Z101
148 PG-238 (INFRARED RECEIVER) 1 RE
149 T3.15A250V-AC 1 F501
150 X24.576M/T24.576M 1 G701
151 贴于场IC (HEATSINK LABEL) 1
152 贴于电源管 (HEATSINK LABEL) 1
153 Speaker 10W/8欧SL-51340H-1FB 2
154 RF-2W-1.5Ω-J 1 R451
155 RY-1/2W-120KΩ-J 3 R503 R504 R555
156 RY-1/2W-2.7KΩ-J 3 R918 R928 R938
157 RY-1/6W-39K-G 1 R206
158 RY-1W-180Ω-J 1 R305
159 RY-1W-1KΩ-J 1 R404
160 RY-1W-1Ω-J 1 R304
161 RY-2W-0.47Ω-J 1 R601
162 RY-2W-12KΩ-J 3 R915 R925 R935
163 RY-2W-15KΩ-J 1 R569
164 RY-2W-2.2Ω-J 1 R561
165 RY-2W-270Ω-J 1 R454
166 RY-2W-4.7Ω-J 1 R567
167 RY-2W-47KΩ-J 1 R512
168 RY-2W-5.6Ω-J 1 R317
169 RY-2W-8.2Ω-J 1 R571
170 IVPH-002/21 ver1.1 1
171 JS02-3AV-14 VER1.2 1
172 Power switch board (71.5 x 53.3mm) 1
173 VI-PH036RE-001 1
174 VI-PR036KY-001 1
175 CL11-100V-0.0047uF-K 1 C522
176 CL11-100V-0.0068uF-K 1 C215
177 CL11-100V-0.015uF-K 1 C301
178 CL11-100V-0.033uF-K 3 C404 C519 C559
179 CL11-100V-0.047uF-K 2 C302 C310
180 CL11-100V-0.1uF-K 8 C201 C209 C303 C458 C704 C705 C706 C520
181 CBB21-250V-0.22uF-J 1 C461
182 CBB21-400V-0.3uF-K 1 C460
183 CBB21-630V-0.027uF-K 1 C457
184 CBB21-630V-0.068uF-J 1 C462
185 CBB23A-250VAC-0.1µF-M 1 C501
186 CBB81-1.6KV-2200PF-K 1 C454
187 CBB81-1.6KV-8200pF-K 1 C456
188 CBB81-1.6KV-9100PF-K 1 C455
189 CL21X-63V-0.15uF-K 1 C207
190 KDC-A04-D 1 SW601A
191 8D-11 1 R502
192 MZ73-9Ω（3feet) 1 RT501
PTC & NTC THERMISTOR
138 10MM
143 7.5MM
POWER SWITCH
POLYPROPYLENE CAPACITOR
POLYESTER CAPACITOR
PCB
OXIDE FILM RESISTOR
OTHER
LED
JUMPERS
31
21
6

SER DESCRIPTION QTY PCB NO.
193 2.0 X 3.5MM 9 L441(短孔2) T501(4) T401(3)
194 2.3 X 3.5MM 2 C507(2)
195 TR 3×10 (without pad) 3 N301 N502 V451
196 TR 3×10 (with pad) 3 V303 N601(2)
197 KFC-A06-P5 6 SW1 SW2 SW3 SW4 SW5 SW6
198 2SA1015-Y 3 V563 V601 V803
199 2SC1674 1 V101
200 2SC1815-Y 9 V201 V202 V203 V311 V562 V602 V702 V801 V802
201 2SC2383 4 V401 V561 V564 V565
202 2SC2482 3 V911 V921 V931
203 2SC5296 1 V451
204 A940 1 V303
205 BF421/BF423 3 V913 V923 V933
206 EWE-5053-V8/ET-5K1E-EV100K 1 A101
207 W206-2AL20KΩ-K 1 RP551
208 MTZJ3V3/3C2 1 D703
209 MTZJ3V6/4A2 1 D509
210 MTZJ5V1/5C2 2 D801 D802
211 MTZJ5V6/6B1 2 D567 D564
212 MTZJ8V2 1 D941
213 MTZJ8V2/9A2 1 D402
214 MTZJ8V7/9B2 1 D561
SER DESCRIPTION QTY
1CT-1KV-1000pF-K(湿封装） +2 C503 C506
2 CT7-2E4-400VAC-2200pF-M +2 C515 C516
3 CT7-2E4-400VAC-3300pF-M -1 C517
4 F22-22R0-031000/JLF-148-ET24 +2 L501 L502
5 YDD-UF16/JLF-98-UF16 -1 L501
6 10MM -2 W509 W510
7 CBB23A-250VAC-0.1µF-M -1 C501
8 CBB23A-250VAC-0.1µF-M +1 C512
9 CBB23A-250VAC-0.22µF-M +2 C501 C502
TRIODE
TACT SWITCH
SCREWS
CERAMIC CAPACITOR
ZENER DIODE
VARIABLE RESISTOR
TUNER
CE STANDARD COMPONENT
COIL, IN,LF,TFM
JUMPERS
POLYPROPYLENE CAPACITOR
PCB NO.
6

.
7
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the
original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to those
used in the original circuits. Service should be performed by
qualified personnel only.
2. Alterations of the design or circuitry of the products should
not be made. Any design alterations or additions will void
the manufacturer’s warranty and will further relieve the
manufacturer of responsibility for personal injury or property
damage resulting therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics
are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by
using replacement components rated for higher voltage,
wattage, etc. Replacement parts which have these special
safety characteristics are identified in the parts list of
Service manual. Electrical components having such
features are identified by shading on the schematics
and by ( ！) on the parts list in Service manual. The use
of a substitute replacement which does not have the same
safety characteristics as the recommended replacement
part shown in the parts list of Service manual may cause
shock, fire, or other hazards
4. Don’t short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing. Some model’s power circuit is
partly different in the GND. The difference of the GND is
shown by the LIVE: ( ) side GND, ISOLATED (NEUTRAL) :
( ) side GND and EARTH : ( ) side GND. Don’t short
between the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND and never measure with a
measuring apparatus (oscilloscope etc.) the LIVE side GND
and ISOLATED (NEUTRAL) side GND or EARTH side GND
at the same time. If above note will not be kept, a fuse or
any parts will be broken.
5. If any repair has been made to the chassis, it is
recommended that the B1 setting should be checked or
adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).
6. The high voltage applied to the picture tube must conform
with that specified in Service manual. Excessive high
voltage can cause an increase in X-Ray emission, arcing
and possible component damage, therefore operation under
excessive high voltage conditions should be kept to a
minimum, or should be prevented. If severe arcing occurs,
remove the AC power immediately and determine the cause
by visual inspection (incorrect installation, cracked or melted
high voltage harness, poor soldering, etc.). To maintain the
proper minimum level of soft X-Ray emission, components
in the high voltage circuitry including the picture tube must
be the exact replacements or alternatives approved by the
manufacturer of the complete product.
7. Do not check high voltage by drawing an arc. Use a high
voltage meter or a high voltage probe with a VTVM.
Discharge the picture tube before attempting meter
connection, by connecting a clip lead to the ground frame
and connecting the other end of the lead through a 10kΩ
2W resitor to the anode button.
8. When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
9. manufacturer’s replacement components.
10. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control
knobs, metal cabinet, screwheads, earphone jack, control
shafts, etc.) to be sure the product is safe to operate without
danger of electrical shock.
11. The surface of the TV screen is coated with a thin film which
can easily be damaged. Be very careful with it when handle
the TV. Should the TV screen become soiled, wipe it with a
soft dry cloth. Never rub it forcefully. Never use any cleaner
or detergent on it.
(1) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second.
(…Withstand a voltage of 1100V AC (r.m.s.) to an appliance
rated up to 120V, and 3000V AC (r.m.s.) to an appliance
rated 200V or more, for a periode of one second.)
This method of test requires a test equipment not generally
found in the service trade.
(2) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
“Leakage Current Tester”, measure the leakage current
from each exposed metal part of the cabinet, particularly
any exposed metal part having a return path to the chassis,
to a known good earth ground (water pipe, etc.). Any
leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).
●Alternate Check Method
Plug the AC line cord directly into the AC outlet ( do not use
a line isolation transformer during this check.). Use an AC
voltmeter having 1000 ohms per volt or more sensitivity in
the following manner. Connect a 1500Ω10W resistor
paralleled by a 0.15μF AC-type capacitor between an
exposed metal part and a known good earth ground (water
pipe, etc.). Measure the AC voltage across the resistor with
the AC voltmeter. Move the resistor connection to each
exposed metal part, particularly any exposed metal part
having a return path to the chassis, and measure the AC
voltage across the resistor. Now, reverse the plug in the AC
outlet and repeat each measurement. Any voltage
measured must not exceed 0.75V AC (r.m.s.). This
corresponds to 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.).
This corresponds to 0.2mA AC (r.m.s.)

.
8
TV Block diagram
TUNER SAW IF IN R IN
RF AGC GIN
B IN
CHROMA
VIDEO
CVBS/Y IN
CVBS1 IN
CVBS2 IN
SDA
SCL MA IN L
MAOUTR MA IN R
MAOUTL
RGB OUT
V OUT H OUT
V
o
V
2i
A
R i1
R
G
B
A
Ri 2
A
Li 2
A
Li2
A
Li1
24C08
POWER
UNIT
130
V
24
V
+13
V
8
V
5
V
3.3
V
CRT PCB
V IN
TDA8177
V OUT
H IN
H OUT
H OUT
D
Y
200
V
SCREE
N
FOCU
S
TDA11105-
X
XXX
Vi1
OUT1-
OUT1+
Vi2
OUT2-
OUT2+
A
N17821
CRT
A
Lo
A
Ro
C
A
Li 1
405
2
audio audio
audio
video
video
bus
video
Video I
N
video
8
V
-13
V

.
9

10
REPLACEMENT OF MEMORY IC
1. MEMORY IC.
This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and
deflection circuits.
When replacing memory IC, be sure to use IC written with the initial value of data.
2. PROCEDURE FOR REPLACING MEMORY IC
(1) Power off
Switch the power off and unplug the power cord from AC outlet.
(2) Replace IC
Be sure to use memory IC written with the initial data values.
(3) Power On
Plug the power cord into the AC outlet and switch the power On.
(4) Check and set SYSTEM default value:
3. Note: enter a factory mode method
1) Factory remote control: Press the factory remote control up [PRESET], press again[TEST]key,
appear on the television screen 'M'.
2) Customer remote control
3) Press [menu] key, appear the picture menu, press few character keys 6483, the screen
appears M.
4) Press [standby] key, withdraw factory mode.
5) The “TEST” will be displayed on the screen.
6) Check the setting value of the SYSTEM default value of Table below. If the value is different,
select items by [CH+]/[CH-] keys and set value by [VOL+]/[VOL-] keys.
7) Press “STANDBY” key again and return to the normal screen.
SERVICE ADJUSTMENT
B1 POWER SUPPLY
1. Receive normal colour bar signal.
2. Connect DC voltmeter to VD541- and isolated ground.
3. Adjust potentiometer in power unit to get the voltage as 110V ±1.0V for 21 inch hereinafter,
130 ±1.0V for 25 inch upwards.
FOCUS ADJUSTMENT
1. Receive a crosshatch signal.
2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and
sharp as possible.
BUS CONTROL ADJUSTMENT
To enter BUS control mode, Press “TEST” key on the Remote control unit of factory. （Customer remote
control press "MENU" key behind in a row press"6""4""8""3"）
Choose a "SETUP SELECT" options in"M2" menu, one by one in order press the numerical key"6, 4, 8 and 3",
press "MUTE" key again can depend on this get into "M3"~"M9" of design menu, general factory the

11
production doesn't need to carry on M 3~ adjustments of M9.
In "M0"~under"M9" appearance press” CALL” the key can get into "M" appearance.
At “M”under the appearance press “-/-“ the key can get into “BUS OPEN” appearance, at “BUS OPEN under,
press “-/-“ the key recover factory appearance.
Remote Hand Unit keys
[M1] [M2] [M3]
[M0]
[M1] menu
MENU0 Geometrical adjustment
Receive PAL standard Complete pattern signal.
Adjustment steps：
a) Adjust V. SLOPE, to the center horizontal line just appeare from half bottom shadow.
b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT.
c) Adjust V. SHIFT, the center horizontal line correspond to CRT vertical center.
d) Adjust H.SHIFT, to get the picture horizontal center correspond to CRT horizontal center.
Receive NTSC signal and repeat above [M0] and [M1] adjustment.
[M2] Menu
AGC Adjustment.
Receive 60dBμ(1mV)VHcolour bar pattern signal，adjust AGC value（voltage from high to low），to noise
reduce gradually and just disappeared point.
Select “shipping”, push [V+] [V-]key to be shipped.
[M3] Menu
CRTcut off and white balance adjustment.
Receive white signal.
a) CRT cut off adjustment.
1. Select “SC”, then automatically vertical scan will be stopped.
2. Adjust SCREEN control on Flyback transformer to get the darkest single horizontal line (red,
green, or blue, sometimes shows more yellow, more purple or more white).
b) White balance adjustment.
1. Select RD/BD menu.
2. Adjust RD/BD to get colour temperature as x=281, y=311
c) Sub-Brightness adjustment. (Use stair case signal)
1. Select SB menu.
2. Adjust SB to get the darkest step being cutoff.
b
cde
ijk
fghHorizontal line
Shado
a

12
I2C standard UOC for export bus control adjustment item default setting 2007-12-05
MI Items Variable Preset recommendation
M0 50HZ 60HZ 50HZ 60HZ
V. LOPE 63 +/-32 Picture vertical center adjustment 35 -01
V. SIZE 63 +/-32 Vertical amplitude adjustment 20 +02
V. SC 63 +/-32 Vertical S Correction Adjustment 25 -01
V.LINE 63 +/-32 Vertical positions adjustment 18 +02
V.SCR 63 +/-32 Vertical S Correction R 32 -01
H.PSASE 15 +/-32 Horizontal position adjustment 40 0
EW.W 63 +/-32 Horizontal amplitude adjustment 55 0
EW.PW 63 +/-32 E/W amplitude adjustment 29 0
EW.TC 63 +/-32 Picture trapezoid adjustment 31 0
EW.UCP 63 +/-32 Picture top Cape adjustment 48 0
EW.LCP 63 +/-32 Picture bottom Cape adjustment 45 0
H.BOW 63 +/-32 Picture bow form adjustment 30 0
H.PAR 63 +/-32 Picture parallelogram adjustment 31 0
H.BLK.SW ON/OFF Horizontal blank switch ON
M1 TV /DVD
CL 0~15 Contrast level offset 13
BLOC 0~15 Black level offset course 6
R.BIA 0~63 R OUT Amplitude Adjustment 32
G.BIA 0~63 32 G OUT Amplitude Adjustment 32 -6
B.BIA 0~63 B OUT Amplitude Adjustment 32
R.DRV 0~63 R OUT Amplitude Adjustment 32
G.DRV 0~63 G OUT Amplitude Adjustment 32
B.DRV 0~63 B OUT Amplitude Adjustment 32
SUB BRT 0~63 Brightness of screen line 32
VSD 0~1 Vertical Ramp Out Stop Selection
TEST.S 0~5
M2 50HZ 60HZ
RF AGC 0~63 32 Tuner AGC Takeover Point Adjustment
OSD.V.POS 0~63 0~63 Vertical position of OSD 13 13
OSD.H.POS 0~63 Horizital position of OSD 13
OSD BRT 0~15 OSD brightness 15
SHIPPING
SETUP SELECT 0~1 Select 1, press the MUTE key to M 3~ M9
M3 SUB CONT 0~63 Sub contrast 63
SUB COLOR 0~63 Sub colour 63
SUB SHARP 0~63 Sub sharpness 63
SUB TINT 0~63 Sub tint 32

13
BTC 0~63 32
COF 0~1 Cut-off control range
0:normal control range 1:extended control range
1
CHINESE ON/OFF OSD language selection ON
THAI ON/OFF OSD language selection ON
VIETNAM ON/OFF OSD language selection ON
INDONESIA ON/OFF OSD language selection ON
ARABIC ON/OFF OSD language selection ON
M4 VA 0~3 Vercital amplitude 0
VAI 0~1 System I output signal amplitude correction 0:no
correction 1:amplitude + 12%
1
CBS 0~1 Control sequence of beam current limiting 0:normal
operation(contrast—brightness) 1:control on
contrast and brightness in parallel
1
COR 0~1 Video dependent coring(peaking)
0:off 1:coring active between 0 and 20 IRE
0
RPA 0~3 Ratio pre-and aftershoot 2
RPO 0~3 Ratio of positive and negative peaks 2
TCI2X 0~1 Top sync clamp current of the CVBS/Y input clamp
0: clamp current about 80 uA 1: clamp current
about 160 uA
0
BKS ON/OFF Baack stretch ON
BSD 0~1 Black stretch Depth 0:15IRE 1:30 IRE 0
AAS 0~3 Black area to switch off the black stretch 0
PWL 0~1 Peak white limiting 0:peak white limiting circuit not
active 1:peak white limiting circuit active
SOC 0~1 Soft clip adjust 0
PWLDAC 0~15 Peak white adjust 2
CHSE 0~15 Color degree identifies an intelligent degree 2
TFR 0~1 Transfer ratio
0:no black level shift due to video content
1:black level shift 10 IRE for a white picture
0
DSK 0~1 Dynamic skin control on/off 0:off 1:on 0
DSA 0~1 Dynamic skin tone angle 0:123 1:117 0
WS 0~1 0
BLS 0~1 Blue stretch mode 0:off 1:on 0
S.IDENT ON/OFF S-VIDEO Identify switch ON
M5 IF Vision IF of RF (38/38.9/45.75/58.75) MHZ 38.9MHZ
OIF 0~15 IF compensate 8
FFI 0~1 Fast filter IF -PLL 0
AGCS 0~3 AGC speed 1

14
DCXO 0~3 Crystal load electric capacity compensate 2
FSL 0~1 Forced slicing level for vertical sync 0
SSL 0~1 Slicing level for horizontal sync separator 0:50%
1:30%,direction top sync
0
GD 0~1 Group delay on CVBSI signal 0:no group delay
correction 1: group delay correction switched on
0
HP2 0~1 Sync hronization of OSD/TEXT display 0
AKB ON/OFF Black current stabilization OFF
DFL 0~1 Disable flash protection from deflection timer
0:restart horizontal output,after flash protection,via
slow start 1: restart horizontal output,after flash
protection,with typical duty-cycle
0
XDT 0~1 x-ray detection on/off 0
FBC 0~1 Fixed beam current switch off 0
ODT 0~1 0
FBC1 0~1 Fixed beam curuent during switch off
0:fixed beam current is 1 mA
1:fixed beam current is 2 mA
0
FSPS 0~1 Selection of left or right hand side in split-Screen
mode
0
FSPB 0~1 Blanking in split-screen mode 0
FSPE 0~1 Enable split-screen mode for demonstration of
features
0
HCO 0~1 EHT tracking mode 0
OSVE 0~1 Black current measuring lines in overscan(for
vertical zoom setting<1)
0
EVB 0~1 Extended vertical blanking 0
IFS.RED 0~1 IF Intelligent degree 1
PWM.VOL ON/OFF OFF
M6 CLF 0~1 Selection internal clamp speed 0:clamp slow
1:clamp 6 times faster
0
BPB 0~1 Enable bypass of sound bandpass filter at mono
mode 0:sound bandpass active for mono
demodulator 1:sound bandpass filter bypassed
0
BPB2 0~1 Bypass sound bandpass filter section 2
0:bandpass filter active 1:bandpass filter bypassed
0
FMWS 0~3 Window select for FM demodulator 0
AGN 0~1 Gain FM demodulator 0:normal operation 1:gain +6
dB
1
AGNE 0~3 FM sound demodulator outopt signal amplitude 1
AVL ON/OFF Auto volume levelling OFF
AVLE 0~1 AVL function on East-West output pin 0

15
DSGLS 0~1 Extra gain selection loudspeaker outputs 0:+0 Db
1:+6 Db
0
NRR 0~1 No red reduction during blue stretch 0
AMLOW 0~1 Audio output signal for AM sound 0
GSSIF 0~1 Extra gain-range SSIF for AM demodulation 0
V.P1 0~100 V.P1 volume of VALUE 10
V.P25 0~100 V.P25 volume of VALUE 45
V.P50 0~100 V.P50 volume of VALUE 70
V.P75 0~100 V.P75 volume of VALUE 85
ON DL 0~16 On delay time 3
OFF DL 0~7 Off delay time 1
ON/OFF MODE 0~1 0
M7 NAT N-USA/PAL N-JPN/PAL N-USA/PAL PAL MAT
ACL 0~1 Automatic color limiting 0:not active 1:active 0
CB 0~1 Chroma bandpass center frequency 0
SBO 0~1 SECAM B-Y blank level offset adjustment 0
BPS 0~1 Bypass of chroma base-band delay line 0:active
1:bypassed
0
FCO 0~1 Forced Color-on 0:on 1:off 0
DTR 0~1 Chroma trap mode
0:single chroma trap
1:dual chroma trap,more suppression but less
bandwidth
0
Y.P 0~15 Y-delay adjustment for PAL signal 8
Y.N 0~15 Y-delay adjustment for NTSC signal 8
Y.AV 0~15 Y-delay adjustment for PAL signal in AV mode 8
Y.SVHS 0~15 Y-delay adjustment for PAL signal in S-video mode 8
PF.P 0~3 PAL Center frequency with postpone adjust 0
PF.N 0~3 NTSC Center frequency with postpone adjust 0
PF.AV 0~3 AV Center frequency with postpone adjust 0
C.PHI.1
M8 S.BRT 0~100 Standard Brightness in pp mode 50
S.CONT 0~100 Standard Contrast in pp mode 75
S.COLOR 0~100 Standard Color in pp mode 50
S.SHARP 0~100 StandardSharpness in pp mode 50
D.BRT 0~100 dynamic Brightness in pp mode 75
D.CONT 0~100 dynamic Contrast in pp mode 100
D.COLOR 0~100 dynamic Color in pp mode 75
D.SHARP 0~100 dynamicSharpness in pp mode 75
M.BRT 0~100 mild Brightness in pp mode 40
M.CONT 0~100 mild Contrast in pp mode 40

16
M.COLOR 0~100 mild Color in pp mode 40
M.SHARP 0~100 mildSharpness in pp mode 40
W.BRT 0~100 factory adjusts Brightness 50
W.CONT 0~100 factory adjusts Contrast 75
W.COLOR 0~100 factory adjusts Color 0
SC BRT 0~100 Subsidiary Bright Adjustment 50
COOL 0~63 Cool color adjustment 8
WARM 0~63 Warm color adjustment 8
M9 AV2 ON/OFF AV2 selection ON
SVHS ON/OFF S-VIDEO selection ON
DVD ON/OFF
DVD（Y U V）selection ON
AUTO SOUND ON/OFF Auto sound system as auto search ON
BG ON/OFF Sound system of 6.0M selecting ON
I ON/OFF Sound system of 5.5M selecting ON
M ON/OFF Sound system of 4.5M selecting ON
DK ON/OFF Sound system of 6.5M selecting ON
SIF PRI ON/OFF Force sound system as auto search ON
POWER REST 0~3 AC power on start selection 1
BANLANCE ON/OFF AV stereo selection (ON:AV STEREO OFF:MONO) OFF
HALFTONE ON/OFF Half tone select OFF
MENU BG ON/OFF Menu background selection OFF
IR OPT SANYO/NEC Remote control selection SANYO
KEY OPT SANYO/MEK KEY BOARD selection SANYO
CURTAIN 0~2 CURTAIN selection 2
LOGO ON/OFF Logo selection OFF
TILT ON/OFF TILT selection ON
ASM OPT 0~1 Search speed selection 1
V.MUTE P.OFF ON/0~7 Select whether cutoff RGB ouput from solution
whlie power off
ON
KEY BOARD: multiple-choice test(0/1)
0: Control keys input (Max. Limit voltage) ---(MEK KEY BOARD)
1: Control keys input (Max. Limit voltage) –(SANYO KEY BOARD)
Function POWER MENU TV/AV V- V+ P- P+
Voltage 0 0.4125 0.825 1.2375 1.65 2.0625 2.475
Function POWER MENU TV/AV V- V+ P- P+
Voltage 2.2 1.75 0.85 1.3 0.4 0.0

17
4 , LOGO EDIT
This software LOGO is a pair of pleased words and customer to edit 2 kinds, at the M_MODE, long
press[P.P]the key can get into a pair of pleased words editor appearance.
( Operate
Press[1]/[2] keys: The LOGO perpendicular position adjust, [1] adjusts upward, [2] get down
adjustment;
Press[3]/[4] keys: The LOGO level position adjust, [3] is to the left adjustment, [4] rightwards adjusts;
Press[REVIEW]key: Withdraw LOGO editor appearance, the LOGO information remembers EEPROM and
return to M_MODE;
Press again[MENU]the key can get into and can edit LOGO appearance.
( Operate
Press[1]/[2] keys: The LOGO perpendicular position adjust, [1] adjusts upward, [2] get down
adjustment;
Press[3]/[4] keys: The LOGO level position adjust, [3] is to the left adjustment, [4] rightwards adjusts;
Press[5]/[6] keys: The color choice of the LOGO character list, [5] regulate the first color, [6] regulate the
second color;
Press[7]/[8] keys: The LOGO character list size adjust, [7] regulate the first size, [8] regulate the second size;
Press[0] keys:Delete the letter of alphabet of importation
Press[(]/[(]key: The LOGO character list choose(0~9;A~Z;a~z; ":.+-*/@", SPACE);
Press[(]/[(]key: Move cursor;
Press[REVIEW]key: Withdraw LOGO editor appearance, the LOGO information remembers EEPROM and
return to M_MODE;
5. The ZOOM adjust.
At the M_MODE, press[ZOOM]key: Press when screen showed "ZOOM" or"16:9"[VOL+]/[VOL-]the key
regulated ZOOM/16:9 of field.

18
ICs functional description
UOC TDA11105-XXXX/TDA11106-XXXX
SYMBOL PIN DESCRIPTION
IF VO 1 IF video output / selected CVBS output
VP2 2 2ND Supply voltage TV processor(+5v)
VCC AUDIO 3 8 volt supply for audio switches(+5V~8V)
PLL IF 4 IF-PLL loop filter
GND2 5 Gaound 2 for TV processor
DECSDEM 6
decoupling sound demodulator or SIF input 2
FMDEMOUT 7
audio output /AM audio output (volume controlled)
EHTO 8
EHT/overvoltage protection input
AGC 9 Tuner AGC output
IREF 10 Reference current input
VSC 11 Vertical sawtooth capacitor
IF IN2 12 IF input 1
IF IN1 13 IF input 2
VDRA 14 Vertical drive A output
VDRB 15 Vertical drive B output
AVL/EW 16 Automatic volume leveling /EAST-WEST drive output
DECBG 17 Band gap decoupling
SECPLL 18 SECAM PLL decoupling
GND1 19 Ground 1 for TV-processor
PH1LF 20 Phase-1 filter
PH2LF 21 Phase-2 filter
VP1 22 1st supply voltage TV-processor(+5V)
DECDIG 23 decoupling digital supply of TV-processor
XTALOUT 24
crystal oscillator output
XTALIN 25
crystal oscillator input
IR 26
Remote control signal input.
MUTE 27 Sound mute output
TILT/UHF 28
KEY 29 Control keys input *3
BAND2 30 Tuner Band selection output
BAND1 31 Tuner Band selection output
TUNING 32 tuning Voltage (Vt) PWM output
VDDP 33 Supply to periphery-3.3V)
SDA 34 I2C-bus data line
SCL 35 I2C-bus clock line
AV1 36
TV/AV (AV1) / AV2 mode Control Output.
AV2 37
TV/AV (AV1) / AV2 mode Control Output.
STANDBY 38 In STAND BY mode, high level (Power OFF).For Power ON this pin will
be reduced to low.
50/60 39

19
VDDC 40 Supply(3.3V)
GND5 41 Ground 5
VPE 42 OPT programming Voltage
VDDA 43 Supply voltage(3.3V)
BOUT 44 Blue output
GOUT 45 Green output
ROUT 46 Red output
BLKIN 47 black current input / V-guard input
BCL IN 48 beam current limiter input
PB 49 B input / U (B-Y) input / PBinput
Y3/CVBS3 50 G input / Y input
PR/C3 51 R input / V (R-Y) input / PRinput
YOUT 52 Y-output(for YUV interface)
Y SYNC 53 Y-input for sync separator
VP3 54 Supply voltage(5V)
GND3 55 Ground connection
HOUT 56 Horizontal output
FBISO 57 Flyback input/sandcastle output
LSR 58 Audio output R
LSL 59 Audio output L
C2/C3/C4/AIN5R 60 S-VIDEO C IN
AIN3/IN1R 61 R AUDIO IN
CVBS2/Y2 62 AV2 VIDEO IN
AIN2/1INL 63 L AUDIO IN
CVBS/Y4/AIN5L 64 AV1 VIDEO IN
TDA7266SA
WIDE SUPPLY VOLTAGE RANGE (3.5-18V)
MINIMUM EXTERNAL COMPONENTS
– NO SWR CAPACITOR
– NO BOOTSTRAP
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN
STAND-BY & MUTE FUNCTIONS
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7266SA is a dual bridge amplifier specially
designed for LCD Monitor, PC Motherboard, TV and
Portable Radio applications.
Pin to pin compatible with: TDA7266S, TDA7266,
TDA7266M, TDA7266MA, TDA7266B, TDA7297SA
& TDA7297.
CLIPWATT15
ORDERING NUMBER: TDA7266SA
7W+7W DUAL BRIDGE AMPLIFIER
TECHNOLOGY BI20II