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Daewoo Electronics
SERVICE MANUAL
T008
2
CONTENTS
1. Safety Precautions…………………………………………………………………………………
2. MCU and signal Processor for a PAL/NTSC TV……………………………………………………
3. Definition of A8891CPNG-**** Pin…………………………………………………………………
4. Remote Control Circuit Diagram and Function……………………………………………………
1)User Remote………………………………………………………………………………………
2)Service Remote……………………………………………………………………………………
5. Service Controlled Function…………………………………………………………………………
1)White balance adjustment…………………………………………………………………………
2)Pictureand AGC adjustment……………………………………………………………………
3)Option set…………………………………………………………………………………………
6. Service and Design Data……………………………………………………………………………
7. ICs Functional Description…………………………………………………………………………
8. Test Point Waveforms………………………………………………………………………………
9. IC Voltages…………………………………………………………………………………………
10. Other……………………………………………………………………………………………
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1. 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 1500Ω 10W 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.)
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2.MCU and signal processor for a PAL/NTSC TV
The TMP8893CPNG-6RE1 is an integrated circuit for a PAL/NTSC TV. A MCU and a TV
signal processor are integrated in a 64-pin shrink DIP package. The MCU contains 8-bit
CPU, ROM, RAM, I/O ports, timer/counters, A/D converters, an on-screen display
controller, remote control interfaces, IIC bus interfaces and the Closed Caption decoder. The
TV signal processor contains PIF, SIF, Video, multi-standard chroma, Sync, RGB
processors.
◆ A8893CPNG-6RE1 MCU+OSD+CCD+ TV Processor controller with Software inside.
◆ 24C08 Non Volatile memory(EEPROM)
◆ STV9302B Vertical deflection system output circuit.
◆ TDA7263 Audio Output
◆ SC6122 Remote Controlled Transmitter.
TOSHIBA G8 chassis color TV block diagram
MCU ， PIF/SIF, Video ,Chroma,
Sync, RGB processors,
H./V. driving pulse
Audio Out
CRT Drive
V. O U T
H.OUT
Tune
r
AV I nput/Output
MEMORY
IR receive
IR transmit
Speake
r
Power
Supply
5
3. Definition of A8891CPNG-6RE1 Pin
NO.
Pin name I/O Function
1 EyeCare or X-ray I/O EyeCare or X-ray
2
Thermal resistance（FS）
Out Thermal resistance
3 KEY I/O Key input
4 VSS - GND connection
5 RESET I/O Reset signal input
6 XOUT In 8 MHz oscillator connecting
7 XIN Out 8 MHz oscillator connecting
8 TEST In GND connection
9 VDD - 5V power supply
10 VSS - GND connection
11 TV DEF AGND - GND yerminal for TV DEF block
12 FBP in In Input terminal for FBP
13 H out Out Output terminal for Horizontal driving pulse
14 HAFC 1 - Terminal to be connected capacitor for H AFC filter
15 V saw - Terminal to be connected capacitor to generate Vsaw signal
16 V out Out Output terminal for Vertical driving pulse
17 AVcc(8V) - Vcc terminal for DEF,RGB,Audio out and PIF out circuit
18 TV A GND - GND terminal for TV block
19 Cb in In Input terminal for Cb signal
20 Y in In Input terminal for Y signal
21 Cr in In Input terminal for Cr signal
22 Ext AU1 in In
Input terminal for Audio1 signal 1
23 C/V3 in In Input terminal for Chroma or Video signal
24 V2 in In Input terminal for Video signal
25 ALC Filter In Terminal to be connected capacitor for ALC(Audio Level Control)
26 V1 in In Input terminal for Video signal.(Input leave = 1 Vp-p)
27 ABCL In Input terminal for ABL/ACL control
28 AU out1 Out Output terminal 1 for Audio signal
29 AU out2 Out Output terminal 2 for Audio signal
30 TV out/FM radio Out Output terminal for detected PIF signal or FM radio
31 SIF out Out Output terminal for 1bit DAC, detected SIF signal or audio monitor out 2.
32 Ext AU2 in In Input terminal for External Audio signal 1
33 H correct/SIF in In Input terminal for H correction and 2nd SIF
34 DC NF Out Terminal to be connected capacitor for DC Negative Feedback from SIF Det
output
35 PIF PLL - Terminal to be connected with loop filter for PIF PLL.This terminal voltage is
controlled PIF VCO frequency.
36 IF Vcc 5V - Vcc terminal for IF circuit. Supply 5V.
37 Reg Fil - Terminal to be connected capacitor for stabilizing internal bias.
38 AU monitor out1 Output terminal for External Audio signal or TV audio signal selected by
BUS(Audio SW)
39 IF AGC - Terminal to be connected with IF AGC filter.
40 IF GND - GND terminal for IF circuit.
41 IF in In Input terminals for IF signals.
42 IF in In Input terminals for IF signals.
43 RF AGC Output terminal for RF AGC control level.
44 Black Det - Terminal to be connected with Black Det filter for black stretch.
45 SVM/Monitor Output terminal for monitor function. Also output terminal for SVM signal
selectable through IIC bus.
46 APC Filter Terminal to be connected with APC filter for chroma demodulation.
47 YC Vcc 5V Vcc terminal for Y/C circuit
48 H/L out Output terminal for High or Low.
49 DVCC Vcc terminal for digital block
50 R out Out Output terminal for R signal.
51 G out Out Output terminal for G signal.
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52 B out Out Output terminal for B signal.
53 TV DGND - GND terminal for digital block.
54 up AGND - GND for Oscillator circuit
55 up AVDD - Vdd for Oscillator circuit Supply 5V
56 VIDEO1/2 Out
TV=0,AV1=OPEN，AV 2 = 5 V
57 SDA1 I/O IIC-BUS SDA1
58 SCL1 I/O IIC-BUS SCL1
59 50/60Hz control I/O 50/60Hz
60 PWM I/O PWM
61 MUTE I/O MUTE
62 H.SYNC I/O Horizontal sync signal input
63 REMOTE I/O Remote controller signal input
64 POWER I/O Power control & Check, On=Hi-Z(input),Off=L(output)
4. Remote Control Circuit Diagram and Function
A.User Remote
NO. Code Name TV Mode
01 00 0 0
02 01 1 1
03 02 2 2
04 03 3 3
05 04 4 4
06 05 5 5
07 06 6 6
08 07 7 7
09 08 8 8
10 09 9 9
11 0A CCD CCD
12 0B -/-- 1-13 0C MENU Menu switch
14 0D SYS System
15 0E QV Quick View
16 0F
→∣ P∣←
Video PP
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
12
16
56
1A
1B
1E
1F
49
OPTION
4C
14
11
45
4D
40
User Remote
CUSL 40
CUSH BF
Diode Pin15
7
17 10 MUTE Mute/unmute
18 11 EyeCare EyeCare
19 12 POWER Power on/off
20 14 TV/AV TV/AV
21 16 DISPLAY Status Recall
22 1A V+ Volume +/Menu Item adjust(increase) and confirm
23 1B P+ Channel +/Menu Item select
24 1E V- Volume -/Menu Item adjust(decrease)
25 1F P- Channel -/Menu Item select
26 40 Service Service in
27 45 SLEEP Sleep
28 49 CALE Calendar
29 4C ZOOM Screen zoom/wide
30 4D MSG Message
31 56 LOCK Lock
B.Service Remote
NO. Code Name TV Mode
01 00 G-DRV G DRIVE
02 01 B-DRV B DRIVE
11 0A MUTE3 To set the screen into a horizontal line.
12 0B MENU MENU
13 0C
↑
ITEM SELECT UP
14 0D
↓
ITEM SELECT DOWN
15 0E
←
Menu Item adjust(decrease)
16 0F
→
Menu Item adjust(increase)
21 14 POWER Power / Stand-by
24 17 HPOS 60Hz HORIZONTAL PHASE
25 18 OSD OSD POSITION ADJUSTMENT
26 19 M-MODE ON M-MODE ON (factory produce mode)
29 1C VP50 50Hz VERTICAL PHASE
Service Remote
CUSL 8E
CUSH 8E
Diode Pin6,7,8,12
8
30 1D HIT 60Hz VERTICAL AMPLITUDE
31 1E HPS 50Hz HORIZONTAL PHASE
32 1F VP60 60Hz VERTICAL PHASE
33 20 RCUT - R CUT adjust(decrease)
34 21 RCUT + R CUT adjust(increase)
35 22 GCUT - G CUT adjust(decrease)
36 23 GCUT + G CUT adjust(increase)
37 24 BCUT - B CUT adjust(decrease)
38 25 BCUT + B CUT adjust(increase)
39 26 HITS 50Hz VERTICAL AMPLITUDE
40 27 VLIN 60Hz VERTICAL-LINEARILTY
42 29 Search Down Manual Search Down
43 2A Search Up Manual Search Up
44 2B BRTS Sub Bright
45 2C D-Mode ON/OFF D-Mode ON/OFF switch
48 2F POS UP Position Up
49 30 POS DOWN Position Down
50 31 Shopout Shop-out
51 32 S-PVOC LOGO ADDRESS
58 39 BUS OFF BUS OFF
60 3B VSC 60Hz VERTICAL-S CORRECTION
61 3C VLIS 50Hz VERTICAL-LINEARILTY
62 3D AGC RF-AGC
63 3E TV IC ADJUST White balance automatic adjustment
5.Service Controlled Function
The Service mode is entered by pressing the “D-MODE ON/OFF” key when the TV is in ON condition,”D” is displayed on
the screen.. Press the “POWER” key to exit Service mode.
Note:How to use user remote enter Service mode?
Press “MENU”
→“6”→“4”→“8”→“3”
key
(1)White balance adjustment
The items within the White Balance mode can be accessed using “Item up” (↑ )/ “Item down” (↓ ) keys and the selected
item value is modified using “Value+” (→ )/ “Value-” (← ) keys. The parameters controlled in the White Balance menu are:
a)Press the key to set the screen into a horizontal line
b)RCUT + : Red cut-off value increase
c)RCUT - : Red cut-off value decrease
d)GCUT +: Green cut-off value increase
e)GCUT -: Green cut-off value decrease
f)BCUT +: Green cut-off value increase
g)BCUT -: Green cut-off value decrease
h)Press the key again to return to the normal picture.
i)GDRV -: Green drive
j) → : value increase
k) ← : value decrease
l)BDRV +: Blue drive
m) → : value increase
n) : value decrease
(2)Picture and AGC service adjustment
1)The items within the Picture mode can be accessed using “Item up” (↑ )/ “Item down” (↓ ) keys and the selected item
value is modified using “Value+” (→ )/ “Value-” (← ) keys. The parameters controlled in the Picture menu are:
a) HPOS: 60Hz HORIZONTAL PHASE
b) VPOS: 60Hz VERTICAL PHASE
c) HIT: 60Hz VERTICAL AMPLITUDE
d) HITZ: 60Hz ZOOM VERTICAL AMPLITUDE
e) HITW: 60Hz WIDE VERTICAL AMPLITUDE
f) VLIN: 60Hz VERTICAL-LINEARILTY
g) VSC: 60Hz VERTICAL-S CORRECTION
h) HPS: 50Hz HORIZONTAL PHASE
i) VPS: 50Hz VERTICAL PHASE
D
040 HPOS
15
00010101
D
009 GDRV
40
01000000
9
j) HITS: 50Hz VERTICAL AMPLITUDE
k) VLIS: 50Hz VERTICAL-LINEARILTY
l) VSS: 50Hz VERTICAL-S CORRECTION
m)AGC:Tuner AGC.
2)For Mass Production
The items of the Picture adjust mode can be accessed quickly using below service remote No.2
and No.5.
For example: If you want to adjust Vertical-SIZE ,then you push [V-SIZE] button Æpush [+] /[-]keys
to adjust Æpush [M-ON] button to exit after you adjust over.
These service remote is common remote, so some function of items is a little difference as below:
Service R/C No.2:
50HZ V-LINE: 60Hz VERTICAL-LINEARILTY
50HZ V-SIZE: 60Hz VERTICAL AMPLITUDE
50HZ V-CENT: 60Hz VERTICAL PHASE
V-SADJ: 60Hz VERTICAL-S CORRECTION
50HZ H-CENT: 60Hz HORIZONTAL PHASE
Service R/C No.5:
RFAGC: RF AGC.
OSD: OSD position adjust.
BRTC: SUB BRIGHT CENTER
Other three buttons are no used.
:
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(3)Option set
1)OPT
Bit Function
Status “ 0” Status “ 1”
Bit7 The algorithm of ASM ASM doesn't judge IFLOCK with case 4 ASM judge IF LOCK with case 4
Bit6 The algorithm of ASM ASM doesn't judge AFT area with case 4 ASM judge AFT area with case 4
Bit5 VT Down of AFT when No Signal no use use
Bit4 Fjp_bb_v_freq C_BB_V_FREQ_313H C_BB_V_FREQ_312_5H
Bit3 Fjp_digital_aft no use use
Bit2 V MUTE V-MuteOn/Off when CH changes Off On
Bit1 Fvmute_type During POS change Y-MUTE RGB-CUT Off DC
OPT
Bit0 Fjp_menu_background no use use
2)OPT1
Bit Function
Status “ 0” Status “ 1”
Bit7 Fjp_calendar no use use
Bit6 Fjp_eyecare no use use
Bit5 Fjp_tint normal inverse
Bit4 Fjp_screen no use use
Bit3 Fjp_rf_pwron AV status memory only TV while power on
Bit2 Fjp_ntsc358 multi color system only358ntsc
Bit1 Fjp_uhf p3 p2
OPT1
Bit0 Fjp_message no use use
3)OPT2
Bit Function
Status “ 0” Status “ 1”
Bit7 Fjp_mute_process no special process add special process for mute
Bit6 Fjp_refresh_tuner no refresh refresh the registers of FS tuner at
the interval of 256ms
Bit5 Fjp_pwr_delay nouse 1S delay power on
Bit4 Fjp_power_option stand by status must use remote control to open
TV
Bit3 Fjp_woofer no use use
Bit2 Fjp_ta1343n no use use
Bit1 Fav_chg_mute not mute mute
OPT2
Bit0 Fslice_level(use to control the seventh
bitof2in1 0x1e register)
40%( set bit6 of register 0x1e of 2in1 to
0)
35%(set bit6 of register 0x1e of
2in1 to 1)
4)OPT3
Bit Function
Status “ 0” Status “ 1”
Bit7 No use
Bit6 PP mode option
VID
mode
Contrast Brightness Sharpness Colour
Standard 100 50 50 50
Dynamic 80 75 60 50
Mild 50 40 30 40
Movie 60 40 50 50
Nature 75 50 40 45
EK
mode
Contrast Brightness Sharpness Colour
Standard 50 50 50 50
Dynamic 100 75 60 50
Mild 40 50 30 50
Movie 100 40 50 50
Nature 75 50 40 50
Bit5 Fjp_pos_av_option no use using local pos key to enter AV while no local
TV/AV key
Bit4 Fjp_mute_exmute no use use
Bit3 Fjp_50_60hz_control no use use
Bit2 Fjp_panel_power panel power key is permitted while panel lock panel power key is forbidden while panel lock
Bit1 Exmute while pos
change
exmute output no exmute
OPT3
Bit0 Extend mode attenuation according to effect1 -5db
5)AOPT
Bit Function
Status “ 0” Status “ 1”
Bit7-6 No use AOPT
Bit5 Fjp_dvd_output following AV1 following AV2(pin56 or pin61)
11
Bit4 Fjp_av_stereo AV mono AV stereo
Bit3 Fjp_fm no FM use FM
Bit2 Fjp_video2 no VIDEO2 use VIDEO2
Bit1 Fjp_dvd no DVD use DVD
Bit0 Fjp_S-video no S-video use S-video
6)EFF1
Bit Function
Status “ 0” Status “ 1”
Bit7 No use This bit must be zero
Bit6 ALS SW for ta1343 off on
Bit5-4 ALS start point 00:220[mv] 01:380[mv] 10:525[mv] 11:770[mv]
Bit3 No use This bit must be zero
Bit2 Input attenuation 0dB -5dB
EFF1
Bit1-0 No use
7)EFF2
Bit Function
Status “ 0” Status “ 1”
Bit7 Bass boost off on
Bit6 No use This bit must be zero on
Bit5-4 Woofer LPF 00:100[hz] 01:125[hz] 10:170[hz] 11:210[hz]
Bit3 No use
EFF2
Bit2-0 Surround effect level 000:off
001:1
…..
111:7
8)CCOR
Bit Function
Status “ 0” Status “ 1”
Bit7 No use No use
Bit6 Italic enable specification register normal italic
Bit5-4 No use No use
CCOR
Bit3-0 Set menu character’s color 0:BLACK 1:BLUE 2:GREEN 3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE 8:BLACK 9: DARK BLUE
10:DARK GREEN and so on
9)TCOR
Bit Function
Status “ 0” Status “ 1”
Bit7 No use No use
Bit6 Italic enable specification register normal italic
Bit5 Underline enable specification register normal underline
Bit4 No use No use
TCOR
Bit3-0 Set menu top character’s color 0:BLACK 1:BLUE 2:GREEN 3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE 8:BLACK 9: DARK BLUE
10:DARK GREEN and so on
10)SCOR
Bit Function
Status “ 0” Status “ 1”
Bit7 No use No use
Bit6 Italic enable specification register 0:normal 1: italic
Bit5-4 No use No use
SCOR
Bit3-0 Set menu selected character’s color 0:BLACK 1:BLUE 2:GREEN 3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE
11)ACOR
Bit Function
Status “ 0” Status “ 1”
Bit7 Transparency enable register for the menu
area
not assign half transparency assign half transparency
Bit6-4 Color select for the menu area 0:BLACK 1:BLUE 2:GREEN
3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE
ACOR
Bit3 Transparency enable register for the
highlight menu area
not assign half transparency assign half transparency
12
Bit2-0 Color select for the highlight menu area 0:BLACK 1:BLUE 2:GREEN 3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE
12)CALB
Bit Function
Status “ 0” Status “ 1”
Bit7 Transparency enable register for calendar
area
not assign half transparency assign half transparency
Bit6-4 Background color for the calendar area 0:BLACK 1:BLUE 2:GREEN3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE
Bit3 Transparency enable register for week area not assign half transparency assign half transparency
CALB
Bit2-0 Background color for the week area 0:BLACK 1:BLUE 2:GREEN3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE
13)CALC
Bit Function
Status “ 0” Status “ 1”
Bit7-3 No use CALB
Bit2-0
Set the character color of calendar
0:BLACK 1:BLUE 2:GREEN3:CYAN 4:RED 5: MAGENDA
6:YELLOW 7:WHITE
14)LOGO
Bit Function
Status “ 0” Status “ 1”
Bit7 No use
Bit6 Fjp_logv_plus up down
Bit5 Fjp_logo_size middle large
Bit4 Fjp_logo_tvon no use logo display while switching on
TV set
Bit3 Fjp_logo_nosignal no use logo display while no signal
LOGO
Bit2-0 Set logo color 000: black 001:blue 010: green 011: cyan 100: red 101: magenda
110: yellow 111: white
15)LOGH
adjust the horizontal display position of lo
16)LOGV
adjust the vertical display position of logo
17UVBK
Bit Function
Status “ 0” Status “ 1”
Bit7-4 U BLK ADJ 0: -22mV, Input DC 8: 0mV F: 19mV, 2.75mV/dev LOGO
Bit3-0 V BLK ADJ 0: -22mV, Input DC 8: 0mV F: 19mV, 2.75mV/dev
18) ABCL
Bit Function
Status “ 0” Status “ 1”
Bit7 Fjp_rf_agc IF isn't mute while AV IF mute while AV
Bit6 Y Peak Limiter Y peak limiter on,105IRE Y peak limiter off
Bit5-4 ACL STATR POINT 0:0V 01:-0.2V 10:-0.3V 11:-1.0V ACL OFF
Bit3
Bit2
ABL START POINT 00: 0V 01: -0.2V 10: -0.30V 11: -0.4V
Bit1
ABCL
Bit0
ABL GAIN 00: -0.2V 01: -0.35V 10: -0.5V 11: -0.65V
19)DCBS
Bit Function
Status “ 0” Status “ 1”
Bit7 C Trap Q _Y Low High
Bit6 Blanking switch H,V blanking on H,V blanking off
Bit5 No use
Bit4 Black stretch SW Off On
Bit3-2 Y GAMMA 00:off 01:Y gamma point 78IRE,gain-6db 10:68 IRE 11:58 IRE
DCBS
Bit1-0 Black stretch start point and gain 00:30IRE,gain high 01:40IRE,gain high 10:50IRE,gain low 11:75IRE,gain
low
20)CLTM
13
Bit Function
Status “ 0” Status “ 1”
Bit7 P/N ID PAL/NTSC killer sensitivity, Normal LOW
Bit6 Killer off Normal Always killer off
Bit5 N COMB Off Color comb filter for NTSC. On
Bit4-3 Demodulation Phase 00:PAL 01:NTSC1 10:NTSC2 11:DVD
CLTM
Bit2-0 Y Delay Time 000:0ns 001: 40ns 010: 80ns 011: 120ns 100: 160ns 101: 200ns
110: 240ns 111: 280ns
21)HAFC
Bit Function
Status “ 0” Status “ 1”
Bit7-6 AFC GAIN (TV mode, weak signal and
Nois_Bit4=0)
Bit5-4 AFC GAIN (TV mode, strong signal and
Nois_Bit4=0)
Bit3-2 AFC GAIN (AV mode)
CLTM
Bit1-0 AFC GAIN (TV mode, and Nois_Bit4=1)
Data Description Blanking
Blanking period Picture period
00: 1 1
01: 4/3 1/3
10: 2 1
11: OFF OFF
22)FLG0
Bit Function
Status “ 0” Status “ 1”
Bit7 vco adjust when position select enable disable
Bit6-5 Select f0 of chroma BPF 0: BPF (AV) 01: TOF1(F0=5MHZ)RF 10: TOF2(F0=6MHZ)RF
11: TOF3(F0=7MHZ)RF
Bit4 BPF-SW Normal, CVBS signal passes along BPF By pass, CVBS signal doesn't
pass along BPF
Bit3 Fvcd_spot_killer off If BB=1, RGB out is 110 IRE
Bit2 Nyquist Buzz cancel Nyquist Buzz cancel off
Bit1 No use
FLG0
Bit0 Over mode Normal PIF over modulation switch on
23)FLG1
Bit Function
Status “ 0” Status “ 1”
Bit7 OSD ABL ABCL active for OSD inactive
Bit6 No use (don't use it)
Bit5-4 OSD CONTRAST 00: 95 IRE 01: 60 IRE 10: 70 IRE 11: 80 IRE
Bit3 Horizontal side blanking OFF On, 92% (FBP BLK off, then
internal BLK only)
Bit2 Fvcd_fm_band Normal Wide
Bit1 V ramp bias power from Y/C VCC power from IC
FLG1
Bit0 CW SW Off On
24)SVM
Bit Function
Status “ 0” Status “ 1”
Bit7-5 No use
Bit4 MON/SVM Pin45 SVM out Monitor out
Bit3-2 SVM delay 00:off 01:-120ns 10:-100ns 11:-80ns
SVM
Bit1-0 SVM gain 00: -7dB 01:-1Db 10:+5dB 11:+11dB
25)UCOM
Bit Function
Status “ 0” Status “ 1”
Bit7-5 No use
Bit4-3 C APC DATA 00: data 1-normal for black &white &NTSC 01: Data 2 10: Data 3 for
PAL 11: the same as 10
UCOM
Bit2 Set chroma APC disable enable use Bit 3,4 data
14
Bit1-0 Internal ADC 00:GND 01: R output 10: B output 11: Monitor RF AGC via ADC
26)SSM
Bit Function
Status “ 0” Status “ 1”
Bit7-6 No use
Bit5-4 S Trap Frequency response Control HP/LP
For M
00:OFF 01:1dB HPF 10:-3dB LPF 11:-2dB LPF
Bit3-2 S Trap Q. for M 00: Q = 3 01:Q = 5 10:Q = 7 (Recommended) 11:Q = 9
SSM
Bit1-0 S Trap Group Delay Control for M 00:off 01:60ns 10:90ns 11:120ns
27)SYNC
Bit Function
Status “ 0” Status “ 1”
Bit7-3 No use
Bit2 H sync judgement BUS TC3
Bit1 Fvcd_sync_separation level 40% 50%
SYNC
Bit0 Sync slice level for weak signal normal low
28)SYNB
Bit Function
Status “ 0” Status “ 1”
Bit7 No use
Bit6 Reg.19H bit7 SY-DET-1 for 889x
Bit5 Reg.19H bit6 SY-DET-4 for 889x
Bit4 Reg.19H bit5 0 for 889x
Bit3 Reg.21H bit1 SY-DET-2 for 889x
Bit2 Reg.21H bit0 SY-DET-3 for 889x
Select the input IF signal level of Sync Lock detection. 00010: 0dB
00011: 0dB 10010: 0dB 10011: 0dB 10001:-4dB 10000:-8dB weak signal
others:Do not use
SYNB
(Sync
detecti
on
setting
for BB
On)
Bit1-0 Sel sync check mode for BB on 00:checking H-LOCK-1 flag(bit3 of r0) 01:checking H-LOCK-2
flag(bit4 of r1) 1x:checking VLOCK flag (bit7 of r1)
29)SYBF
Bit Function
Status “ 0” Status “ 1”
Bit7 No use
Bit6 Reg.19H bit7 SY-DET-1 for 889x
Bit5 Reg.19H bit6 SY-DET-4 for 889x
Bit4 Reg.19H bit5 0 for 889x
Bit3 Reg.21H bit1 SY-DET-2 for 889x
Bit2 Reg.21H bit0 SY-DET-3 for 889x
Select the input IF signal level of Sync Lock detection. 00010: 0dB
00011: 0dB 10010: 0dB 10011: 0dB 10001:-4dB 10000:-8dB weak signal
others:Do not use
SYNB
(Sync
detecti
on
setting
for BB
Off)
Bit1-0 Sel sync check mode for BB oFF 00:checking H-LOCK-1 flag(bit3 of r0) 01:checking H-LOCK-2
flag(bit4 of r1)
1x:checking VLOCK flag (bit7 of r1)
30)SYSR
Bit Function
Status “ 0” Status “ 1”
Bit7 No use
Bit6 Reg.19H bit7 SY-DET-1 for 889x
Bit5 Reg.19H bit6 SY-DET-4 for 889x
Bit4 Reg.19H bit5 0 for 889x
Bit3 Reg.21H bit1 SY-DET-2 for 889x
Bit2 Reg.21H bit0 SY-DET-3 for 889x
Select the input IF signal level of Sync Lock detection. 00010: 0dB
00011: 0dB 10010: 0dB 10011: 0dB 10001:-4dB 10000:-8dB weak signal
others:Do not use
SYNB
(Sync
detect
ion
settin
g for
searc
h/tuni
ng)
Bit1-0 Sel sync check mode for search/tuning 00:checking H-LOCK-1 flag(bit3 of r0) 01:checking H-LOCK-2
flag(bit4 of r1)
1x:checking VLOCK flag (bit7 of r1)
31)VCD0
Bit Function
Status “ 0” Status “ 1”
Bit7-6 Audio Monitor Out 00:depend on Audio SW 01:TV 1X:mute
Bit5-4 C Trap MD 00: interlocking video SW 01: as 00 10: not interlocking C-trap off 11: not
interlock C-trap on
Bit3 Halftone Gain Main:OSD 30%: 70% Main:OSD 50%: 50%
Bit2 U/V Switch Cb/Cr, Cr input(#21)gain up,+3Db U/V
Bit1 Sharpness f0 frequency 2.75MHz 4MHz
VCDO
Bit0 Sync. skew switch OFF sync skew detection on
15
32)VCD1
Bit Function
Status “ 0” Status “ 1”
Bit7-4 No use
Bit3-2 PIF detected output level trimming 00: 1.05Vp-p 01:do not use 10: 2.2Vp-p 11:do not use
VCD1
Bit1-0 FM BPF 00: internal BPF mode 01: not use10: not use 11: external BPF mode
33)CATVM
00=STD
01=IRC
02=HRC
34)LOGO address
280-28F logo display while switching on TV set
290-29F logo display while no signal
Use No.5 Service Remote press “ S-PVOC” key into LOGO address, then use No.1 Service Remote press “ ↑ /↓ ” key to select LOGO
address and press “ ← /→ ” key to adjustment data.
alphabet A B C D E F G H I J K L M
data 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D
alphabet N O P Q R S T U V W X Y Z
data 4E 4F 50 51 52 53 54 55 56 57 58 59 5A
number 0 1 2 3 4 5 6 7 8 9 Spacing End
data 30 31 32 33 34 35 36 37 38 39 20 00
35) PVHH/PVHL/PUHH/PUHL
FS Tuner band set
For example: Some Tuner band specification is:
L：55.25-127.25 MHz(C2-B)/M:133.25-361.25 MHz(C - W+11)/H:367.25-801.25 MHz(W+13 –C69)
PVHH/PVHL
{[(127.25+133.25)÷2+45.75]x16-48} =2768(algorism), change to hex is 0AD0，so PVHH=0A ，PVHL=D0
PUHH/PUHL
{[(361.25+367.25)÷2+45.75]x16-48}=6512(algorism), change to hex is 1970，so PVHH=19 ，PVHL=70
PVHH=OA
PVHL=D0
PUHH=19
PUHL=70
6. Service and Design Data
21” UTI T008 BUS DATE
T008 21” SAMSUNG
NO. ITEM DATA REMARK ITEM DATA REMARK
006 RCUT 20
R CUT OFF
069 TREC 40
TREBLE CENTER VALUE
007 GCUT 20
G CUT OFF
070 BALC 3F
BALANCE CENTER VALUE
008 BCUT 20
B CUT OFF
071 WOFC 39
WOFFER CENTER VALUE
009 GDRV 40
G DRIVE
072
BASX 72
BASS MAX VALUE
010 BDRV 40
B DRIVE
073 TREX 72
TREBLE CENTER VALUE
011 CNTX 7F SUB CONTRAST MAX 074 WOFX 72
WOFFER CENTER VALUE
012 BRTS 00 SUB BRIGHNESS 075
EFF1 40 SOUND EFFECT1
013 BRTC 48 SUB BRIGHT CENTER 076
EFF2
17 SOUND EFFECT2
014 COLC 40 SUB COLOR for NTSC 077 FLG0 44 FLAGS
015 TNTC 40 SUB TINT CENTER 078 FLG1 20 FLAGS
016 COLP 00 SUB COLOR for PAL 079 SVM 10 SVM
017 SCNT 0A SUB CONTRAST 080 VBLK 00 V BLK Start/Stop
018 CNTC 58 SUB CONTRAST CENTER 081 VCEN 27 V CENTERING
019 CNTN 00 SUB CONTRAST MIN 082 UCOM 10 Miciom Control
020 BRTX 35 SUB BRIGHT MAX 083 PYNX 33
NORMAL H.SYNC MAX
021 BRTN 25 SUB BRIGHT MIN 084 PYNN 11
NORMAL H.SYNC MIN
022 COLX 35
SUB COLOR MAX
085 PYXS 22
SEARCH H.SYNC MAX
023 COLN 0B
SUB COLOR MIN
086 PYNS 1E
SEARCH H.SYNC MIN
024 TNTX 35
SUB TINT MAX
087 AUSTP 04 AUDIO STEP
025 TNTN 28
SUB TINT MIN
088 STM 07 S Trap f0 For M
026 ST3 20
TV—3.58 SHARP
089 SSM 07 S Select For M
027 SV3 25
AV—3.58 SHARP
090 SYNC 02 SYNC
028 ST4 18
TV—4.43 SHARP
091 SYBN 44 Sync detection setting for BB On
029 SV4 25
AV—4.43 SHARP
092 SYBF 44 Sync detection setting for BB Off
030 SVD 25 DVD SHARP CENTER 093 SYSR 44 Sync detection setting for search/tuning
16
031 ASSH 07
ASYMMETRY SHARP
094
BBCT 04 Blue back hysteresis counter (BUS H sync
detection)
032 SHPX 35
SUB SHARP MAX
095 VCD0 0E VCD0 data
033 SHPN 10
SUB SHARP MIN
096 VCD1 08 VCD1 data
034 UVBK 88 U/V BLK ADJ 097 CCOR 43 Set menu character’s color
035 ABCL E7 ABL SYSTEM 098 TCOR 65 Set menu top character’s color
036 DCBS 17 A part of Video data in detail 099 SCOR 06 Set menu selected character’s color
037 CLTM B7 The data when TV mode&SOUND SYS=M 100 ACOR 88 Set menu’s background color
038 CLVO B7 The data when YUV mode&SOUND
SYS!=M
101 CALB FD Menu color option
039 CLVD 98 The data when YUV mode&SOUND SYS=M 102
CALC
00 SET CALENDAR BACKGROUND COLOR
040 HPOS OC 60Hz HORIZONTAL PHASE 103 CCD OSD 30 CCD OSD POSITION ADJUSTMENT
041 VPOS 01 60Hz VERTICAL PHASE
104
CCD
OSDF
59 CCD OSD WIDTH
042 HIT 24 60Hz VERTICAL AMPLITUDE 105 OSDF 51 OSD WIDTH
043 HITZ 09 Zoom VERTICAL AMPLITUDE
106
OSD 10 OSD POSITION ADJUSTMENT
044 HITW 12 Wide VERTICAL AMPLITUDE
107 CUSL
40 To set remote controller's custom code(low
byte)
045 VLIN 12 60Hz VERTICAL-LINEARILTY
108 CUSH
BF To set remote controller's custom code(high
byte)
046 VSC 0E 60Hz VERTICAL-S CORRECTION
109
FSAD
C0 FS tuner address
047 HBOW 04 H. BOW
110
VPL
C5 Be used to adjust the xray protect voltage
048 HPAR 04 H. PAR
111 VAD J
00
Be used to adjust the base input voltage of
eyecare
049 OV60 05 OSD Vertical position for 60Hz
112 SADJ
07
Be used to adjust the check speed of eyecare
050 HPS 00 50Hz HORIZONTAL PHASE
113 LOGH
00
LOGO HORIZONTAL POSITION
051 VPS 00 50Hz VERTICAL PHASE
114 LOGV
0F
LOGO VERTICAL POSITION
052 HITS 00 50Hz VERTICAL AMPLITUDE 11 5
LOGO
45 LOGO select
053 VLIS 00 50Hz VERTICAL-LINEARILTY
116
ERAS
A3 Be used to adjust the time of thermal resistance
control
054 VSS 00 50Hz VERTICAL-S CORRECTION
117
CATVM 00 CATV select
055 OV50 00 OSD Vertical position for 50Hz
118 WTON 7D Turn on delay set
056 RAGC 25 RF AGC
119 WOTF EF Turn off delay set
057 HAFC 86 AFC GAIN
120 PVHH
0A
Be used to set the start frequency of VHFH
band of FS tuner(high byte)
058 NOIS 0F NOISE
121 PVHL
D0
Be used to set the start frequency of VHFH
band of FS tuner(low byte)
059 NDTC 1F NOISE DET count (Weak -> Normal)
122
PUHH
19
Be used to set the start frequency of UHF band
of FS tuner(high byte)
060 V1 09 TV VOLUME 1%
123
PUHL
D0
Be used to set the start frequency of UHF band
of FS tuner(low byte)
061 V25 3D TV VOLUME 25%
124 SOSP
10
Position OSD adjustment
062 V50 57 TV VOLUME 50%
125 HPSD
03
DVD HORIZONTAL PHASE
063 V100 75
TV VOLUME 100%
064 AV50 5A AV VOLUME 50%
001 OTP
17
OPTION
065 AV100 79 AV VOLUME 100%
002 OTP1
9D
OPTION1
066 ATTV 70 To set the register of audio ATT while using
ta1343n at TV or FM mode
003 OTP2
B2
OPTION2
067
ATAV
70 To set the register of audio ATT while using
ta1343n at VIDEO or DVD mode
004 OTP3
53
OPTION3
068 BASC 40
BASS CENTER VALUE
005 AOTP
14
AV OPTION
7．ICs Functional Description
TDA9302B Function : Vertical Output
PIN PIN CONNECTIONS PIN PIN CONNECTIONS
1 Input 5 V. OUT
2 Vcc 6 Output Stage Vcc
3 PUMP UP OUT 7 NON. INV. IN
4 GND
TDA7267 Function : Audio Output
PIN PIN CONNECTIONS PIN PIN CONNECTIONS
1 NC 7 NC
2 NC 8 OUTPUT
3 SUR/MUTING 9 Vcc
4 INPUT(-) 10 NC
5 INPUT 11 NC
6 GND
17
8．Test Point Waveforms
9. IC Voltages
A8893CPNG-6RE1
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Voltage 2.7 0.1 5.1 0.0 5.1 2.3 2.1 0.0 5.1 0.0 0.0 1.1 2.1 5.5 4.1 4.9 7.9 0.0 1.9
Pin 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
Voltage 1.9 2.0 3.9 2.4 2.5 0.7 2.7 4.4 3.1 3.2 3.0 3.2 3.9 2.9 2.2 2.4 5.0 2.1 3.1
V411 C
5Vpp
7Vpp
1000Vpp
1.3V
pp
H
H
4.5Vpp
V
H
H
CRT KB
CRT KG
CRT KR
95Vpp
95Vpp
95Vpp
H
H
H
V444 C
HEATER
75Vpp
23Vpp
H
H
V444 B
0.7Vpp
A8891 PIN50
3.8Vpp 3.8Vpp
3.8Vpp
H H
H
A8891 PIN51
A8891 PIN52
A8891 PIN13 A8891 PIN12
A8891 PIN16
A8891 PIN6
H
A8891 PIN26
A8891 PIN30
H
2Vpp
1Vpp
18
Pin 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 53 55 56 57
Pin 3.0 0.0 2.0 2.0 2.0 1.9 2.8 2.3 5.0 2.0 3.3 2.6 2.6 2.6 0.0 0.0 5.1 0.0 5.1
Pin 58 59 60 61 62 63 64
Voltage 5.1 5.1 5.1 0.1 0.6 5.1 3.4
STV9302B
Pin 1 2 3 4 5 6 7
Voltage 3.0 26.5 1.5 0.0 13.2 26.8 3.0
TDA7253(Mono)
Pin 1 2 3 4 5 6 7 8 9 10 11
Voltage 0.0 0.0 11.5 1.7 1.7 0.0 0.0 8.9 19.6 0.0 0.0
TDA7263(Stereo)
Pin 1 2 3 4 5 6 7 8 9 10 11
Voltage
AC supply : 110V 50/60Hz
10. Other
1)Binary code change to hex
Binary code Hex
0 0 0 0 0
0 0 0 1 1
0 0 1 0 2
0 0 1 1 3
0 1 0 0 4
0 1 0 1 5
0 1 1 0 6
0 1 1 1 7
1 0 0 0 8
1 0 0 1 9
1 0 1 0 A
1 0 1 1 B
1 1 0 0 C
1 1 0 1 D
1 1 1 0 E
1 1 1 1 F
2) Some skills of factory adjustment:
a)How to use Service Remote enter service mode?
Pressing the “D MODE ON/OFF” key. Press “D MODE ON/OFF” key again to exit service mode.
b)How to use User remote enter Service mode?
Press “MENU”→“ 6”→“4”→“8”→“3” key(within 6s).
c)How to unlock V-CHIP if you forgot password?
Press V-” key on the set to“ 00” keep then press MENU” key on the User Remote. Into V-CHIP menu, set V-CHIP password again.
3)Keyboard input:
Key In Key Pressed
0.0-0.3V POWER
0.3-1.0V Program+
1.0-1.7V Program-
1.7-2.4V Volume+
2.4-3.1V Volume-
3.1-3.8V TV/AV
3.8-4.5V Menu
28V
0
0
0
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