Teac CTM6845 User manual
SERVICE MANUAL
CTM6845
68CM CTV
* 2 types of chassis please check serial number of unit to determine which CCT to use.
SECTION 1 – HAIER CHASSIS SECTION 2 – SYBER CHASSIS
Brand Factory Model Serial no. from To
TEAC Syber CT-M6845 3600001-49 3603120-49
TEAC Syber CT-M6845 3603121-49 3606084-49
TEAC Syber CT-M6845 3606085-49 3610062-49
TEAC Syber CT-M6845 3800001-49 3802964-49
TEAC Syber CT-M6845 3Y00001-49 3Y02340-49
TEAC Haier CT-M6845 3Z00001-49 3Z02592-49
TEAC Haier CT-M6845 4200001-49 4202340-49
JUN03 SERVCTM6845
UOC TDA9373 SERIES
CT-M6845
S
S
SE
E
ER
R
RV
V
VI
I
IC
C
CE
E
EM
M
MA
A
AN
N
NU
U
UA
A
AL
L
L
COLOUR TELEVISION
PUSH PUSH
SECTION 1:
.
2
CONTENTS
1. safety precautions…………………………………………………………………………..……………3
2. TV block diagram
and PHILIPS UOC functional difference between the various IC versions …………….…..…….4
3．Replacement of memory IC………………………………………………………… …………………7
4．Service adjustment………………………………………………………… ………………………...7
5．ICs functional description………………………………………………………………………………9
6．Test point waveform………………………………………………………………………………….…12
7．All ICs/transistors voltages…………………………………………………………………………….13
8．Purity / convergence adjustment……………………………………………………………………..14
9．List of Parts ………………………………………………………………………….………………….16
.
3
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 10kΩ2W
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 3000VAC (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 0.5mAAC (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 0.5mAAC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.).
This corresponds to 0.2mAAC (r.m.s.)
.
4
2. TV Block diagram
PHILIPS UOC FUNCTIONAL DIFFERENCE BETWEEN THE VARIOUS IC VERSIONS
IC VERSION 9350 9351 9352 9353 9360 9361 9362 9363 9364 9365 9366 9367 9380 9381 9382 9383 9384 9385 9386 9387 9388 9389 9370 9373 9375 9377 9378
TV rang 90 90 90 110 90 90 110 110 110 110 90 90 90 90 90 110 110 110 110 90 110 110 90 110 110 90 110
Mono inter-carrier multi-standard
Sound demodulator (4.5-6.5MHz)
With switch able centre frequency
√√√√√√√√√√√√√√√√√
Audio switch √√√√√√√√√√√√√√√√√
TUNER SAW
IF IN Y IN
RF AGC V IN
U IN
CVBSINT
CHROMA
IFVO OUT
CVBS/Y IN
SDA
SCL
AUDIO OUT IK
RGB OUT
V OUT H OUT
S
TRAP
V
o
V2i
V1i
Y
C
r
C
b
ARi2
ARi1
ALi2
ALi1
S-VHS
24C04
POWER
UNIT
130V
24V
16V
8V
5V
3.3V
CRT PCB
V IN
TDA8351
V OUT
H IN
H OUT
H OUT
DY
200V
+15V
-15V
S
CREEN
F
OCUS
TDA93X
X
Vi1
OUT1-
OUT1+
Vi2
OUT2-
OUT2+
A
N7522
CRT
ALo
ARo
C
Y
4052
TDA9859
A OUTR
A OUTL
MAIN L
MAIN R
SDA/SCL
AV 2 R
AV 2 R
M OUTR
M OUTL
AV 1 L
AV 2 L
7
4
5
1
2
6
7
8
XS303
5
V
TDA9874
audio audio
audio
audio
video
video
bus
bus
video
video
video
.
5
Automatic volume leveling √√√√√√√√√√√√√
Automatic volume leveling or
Subcarrier output (for comb filter
applications)
√√√√√√√√√√√√√
QSS sound IF amplifier with
Separate input and AGC circuit
√√√√√√√√√√
AM sound demodulator without
Extra reference circuit
√√
PAL decoder √√√√√√√√√√√√√√√√√√√√√√
SECAM decoder √√√√√√√√√√√
NTSC decoder √√√√√√√√√√√√√√√√√√√√√√√√√√√
Horizontal geometry(E-W) √√√√√√√√√√√√√√
Horizontal and vertical zoom √√√√√√√√√√√√√√
ROM size 32-
64k
32-
64k
32-
64k
32-
64k
64-
128
64-
128
64-
128
64-
128
64-
128
64-
128
64-
128
64-
128
16-
64k
16-
64k
16-
64k
16-
64k
16-
64k
16-
64k
16-
64k
16-
64k
16-
64k
16-
64k
32-
55k
32-
55k
32-
55k
32-
55k
32-
55k
User RAM size 1k 1k 1k 1k 2k 2k 2k 2k 2k 2k 2k 2k 1k 1k 1k 1k 1k 1k 1k 1k 1k 1k 2.25 2.25 2.25 2.25 2.25
Teletext 1 p 1p 1p 1p 10p 10p 10p 10p 10p 10p 10p 10p
Closed captioning √√√√√√√√√√√√√√√√√√√√√√√√√√√
Block diagram TDA93xX PS/N2 series with mono intercarrier sound demodulator
.
6
7
3.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:
1) Press “QV” key holding about 4 second and then press “MENU1” key on the Remote control unit.
Or Press “TEST” key on the Remote control unit for factory used.
2) The “TEST” will be displayed on the screen.
3) Press digital key, (Mkey) and corresponding on-screen display will be appeared.
Some time “PASSWORD” on-screen display will be appeared, you need to input 828.
4) 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.
5) Press “STANDBY” key again and return to the normal screen.
4.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 CONTROLADJUSTMENT
To enter BUS control mode, Press “TEST” key on the Remote control unit of factory.
Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared.
On TV screen “TEST” will be indicated, this means entered bus control mode.
And press following key, each function will be available.
Remote Hand Unit keys
[M1] [M2] [M3]
[M0]
[M8] menu
MENU8
V SLOPE
31
V SHIFT
31
V AMP
31
V SCOR
31
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ijk
fgh
8
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.
[M7] 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.
[M9] 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.
ICs Default Settings
1．TDA9381(1.0) EK cord=NTDA9381-----NG
MI Items Variable Preset MI Items Variable Preset
M0 AVL ON/OFF ON M4 SUBCON 0~63 63
FSL ON/OFF ON SUBCOL 0~63 63
FMWS ON/OFF OFF SUBSHP 0~63 63
FFI ON/OFF OFF SUBTINT 0~15 15
OSO ON/OFF ON YDLY PAL 0~15 12
FCO ON/OFF OFF YDLY NTSC 0~15 12
WOOFER ON/OFF OFF YDLY SEC 0~15 12
DUAL OUT 0~1 0 YDLY AV 0~15 12
Volume mode 0~1 1 UOC VOL ON/OFF Off
CATHODE 0~15 15
M1 BAND 0~2 2 SC BRI 0~63 10
AV CFG* 0~8 3
NTSC MX USA M5 OSD VPOS 0~63 53
VIDEO OUT CVBS OSD HPOS 0~59 15
PIN5 NTSC WIDE 0~63 15
PRO 0~3 0 ZOOM 0~63 59
NENU TITLE 0~6 3
M2 VISION IF 38.9M E2PROM ADRESS 0~33
DK ON/OFF OFF E2PROM VALUE 0~95
BG ON/OFF ON E2PROM WRITE
I ON/OFF OFF
M ON/OFF OFF M8 FREQUENCY 50HZ 60HZ
SIF PREFER BG VSLOPE 0~63 31 31
AUTO SOUND ON/OFF ON VSHIFT 0~63 31 31
VAMP 0~63 31 31
M3 START ON 0~2 0 VSCOR 0~63 31 31
ENGLISH ON/OFF ON HSHIFT 0~63 31 31
9
ARABIC ON/OFF OFF
PERSIAN ON/OFF OFF M9 BT 0~63 48
TURKISH ON/OFF OFF CT 0~63 48
FRANCE ON/OFF OFF SC OFF
RUSSIA ON/OFF OFF RB 0~63 32
GB 0~63 32
M6 SHIPMODE RD 0~63 32
SEARCH SPEED 0~3 0 GD 0~63 32
M7 AGC-TOP 0~63 25 BD 0~63 32
AGC-SPEED 0~3 2 SB 0~63 40
2. TDA9361(1.1) EK cord=NTDA9361-----NF
MI Items Variable Preset MI Items Variable Preset
M0 AVL ON/OFF ON M4 SUBCON 0~63 63
FSL ON/OFF ON SUBCOL 0~63 63
FMWS ON/OFF OFF SUBSHP 0~63 63
FFI ON/OFF OFF SUBTINT 0~15 15
OSO ON/OFF ON YDLY PAL 0~15 12
FCO ON/OFF OFF YDLY NTSC 0~15 12
WOOFER ON/OFF OFF YDLY SEC 0~15 12
DUAL OUT 0~1 0 YDLY AV 0~15 12
Volume mode 0~1 1 UOC VOL ON/OFF Off
CATHODE 0~15 15
M1 BAND 0~2 2 SC BRI 0~63 10
AV CFG* 0~8 3
NTSC MX USA M6 LOGO ON/OFF ON
VIDEO OUT CVBS LOGO COLUR 0~7 0
PIN5 NTSC LOGO POSITION 0~11 0
PRO 0~3 0 LOGO CHAR
SHIPMODE
M2 VISION IF 38.9M SEARCH SPEED 0~3 0
DK ON/OFF OFF
BG ON/OFF ON M7 AGC-TOP 0~63 25
I ON/OFF OFF AGC-SPEED 0~3 2
M ON/OFF OFF
SIF PREFER BG M8 FREQUENCY 50HZ 60HZ
AUTO SOUND ON/OFF ON VSLOPE 0~63 31 31
VSHIFT 0~63 31 31
M3 START ON 0~2 0 VAMP 0~63 31 31
ENGLISH ON/OFF ON VSCOR 0~63 31 31
ARABIC ON/OFF OFF HSHIFT 0~63 31 31
PERSIAN ON/OFF OFF
TURKISH ON/OFF OFF M9 BT 0~63 48
FRANCE ON/OFF OFF CT 0~63 48
RUSSIA ON/OFF OFF SC OFF
Spanish bit 0~1 0 RB 0~63 32
TXT DEF 0~3 0 GB 0~63 32
RD 0~63 32
M5 OSD VPOS 0~63 53 GD 0~63 32
OSD HPOS 0~59 15 BD 0~63 32
WIDE 0~63 15 SB 0~63 40
ZOOM 0~63 59
NENU TITLE 0~6 3
10
5. ICs functional description
UOC TDA93XX
SYMBOL PIN DESCRIPTION
STAND BY output. 1 In STAND BY mode, high level (Power OFF).
For Power ON this pin will be reduced to low.
SCL 2 I2C-bus clock line
SDA 3 I2C-bus data line
TUNING 4 tuning Voltage (Vt) PWM output
P3.0/NTSC SW 5 Port 3.0 or NTSC output/SCART SW input, Forced NTSC selection,
Low-level output, otherwise High output.
KEY 6 Control keys input *3
VOL 7 Sound Volume control PWM output
MUTE 8 Sound mute output
VSSC/P 9 Digit ground for µ-controller core and periphery
BAND1 10 Tuner Band selection output
BAND2 11 Tuner Band selection output
VSSA 12 Analog ground of teletext decoder and digital ground of TV-processor
SECPLL 13 SECAM PLL decoupling
VP2 14 2nd supply voltage TV-processor(+8V)
DECDIG 15 decoupling digital supply of TV-processor
PH2LF 16 Phase-2 filter
PH1LF 17 Phase-1 filter
GND3 18 Ground 3 for TV-processor
DECBG 19 Band gap decoupling
AVL/EWD 20 Automatic volume leveling /EAST-WEST drive output
VDRB 21 Vertical drive B output
VDRA 22 Vertical drive A output
IFIN1 23 IF input 1
IFIN2 24 IF input 2
IREF 25 Reference current input
VSC 26 Vertical sawtooth capacitor
TUNER AGC 27 Tuner AGC output
AUDEEM/SIFIN1 *1 28 Audio deemphasis or SIF input
DECSDEM/SIFIN2 29 decoupling sound demodulator or SIF input 2
GND2 30
ground 2 for TV processor
SNDPLL/SIFAGC *1 31 narrow band PLLfilter orAGC sound IF
AVL/SNDIF/REF0/
AMOUT *1 32 Automatic Volume Levelling / sound IF input / subcarrier reference output / audio
deemphasis
HOUT 33
horizontal output
FBISO 34
flyback input/sandcastle output
AUDEXT/QSSO/
AMOUT *1 35 external audio output / QSS intercarrier out
EHTO 36
EHT/overvoltage protection input
PLL IF 37 IF-PLL loop filter
IFVO/SVO 38
IF video output / selected CVBS output
VP1 39
supply voltage TV processor
CVBS INT 40 internal CVBS input
GND1 41
ground for TV processor
CVBS/Y 42
CVBS/Y input
CHROMA 43
C input
AUDOUT/AMOUT *1 44 audio output /AM audio output (volume controlled)
INSSW2 45
2nd RGB / YUV insertion input
R2/VIN 46
2nd R input / V (R-Y) input / PR input
11
G2/YIN 47
2nd G input / Y input
B2/UIN 48
2nd B input / U (B-Y) input / PB input
BCLIN 49
beam current limiter input
BLKIN 50
black current input / V-guard input
RO 51
Red output
GO 52
Green output
BO 53
Blue output
VDDA 54
analog supply of Closed Caption decoder and digital supply of TV-processor (3.3 V)
VPE 55
OTP Programming Voltage
VDDC 56
digital supply to core (3.3 V)
OSCGND 57
oscillator ground supply
XTALIN 58
crystal oscillator input
XTALOUT 59
crystal oscillator output
RESET 60
reset
VDDP 61
digital supply to periphery (+3.3 V)
P1.0/INT1 62
TV/AV (AV1) / AV2 /S-VHS mode Output.
P1.1/T0 63
TV/AV (AV1) / AV2 /S-VHS mode Output.
P1.2/INT0 64
Remote control signal input.
Note
1. The function of pin 20, 28, 29, 31, 32, 35 and 44 is dependent on the IC version (mono intercarrier FM demodulator /QSS IF
amplifier and East-West output or not) and on some software control bits. The valid combinations are given in table 1.
2. the vertical guard function can be controlled via pin 49 or pin 50. the selection is made by means of the
IVG bit in subaddress 2BH.
TABLE 1
IC version FM-PLL version QSS version
East-West Y/N NYNY
CMB1/CMB0
bits
00 01/10/11 00 01/10/11 00 01/10/11 00 01/10/11
AM bits - - - - - 0 1 - 0 1
Pin 20 AVL EWD AVL EWD
Pin 28 AUDEEM SIFIN1
Pin 29 DECSDEM SIFIN2
Pin 31 SNDPLL SIFAGC
Pin 32 SNDIF(1) REFO(2) AVL/SNDIF(1) REFO(2) AMOUT REFO(2) AMOUT REFO(2)
Pin 35 AUDEXT AUDEXT QSSO AMOUT AUDEXT QSSO AMOUT
Pin 44 AUDOUT Controlled AM or audio out
Note
1. When additional (external) selectivity is required for FM-PLL system pin 32 can be used as sound IF input. This function is
selected by means of SIF bit in subaddress 28H.
2. the reference output signal is only available for the CMB1/CMB0 setting of 0/1. for the other settings this pin is a switch
output(see also 5 table 67).
Pin No. 6: Control keys input (Max. Limit voltage)
AN7522/7523 Function:audio output
Symbol PIN Function Symbol PIN Function
Vcc 1 Power supply GND 7 ground
Out 1 (+) 2 Ch 1 output (+) In 2 8 Ch 2 input
GND(out 1) 3 Ch 1Ground VOL 9 Volume Control
Out 1 (-) 4 Ch 1 output (-) Out 2 (-) 10 Ch 2 output (-)
Standby 5 Mute input GND(out 2) 11 Ch 2 Ground
In 1 6 Ch 1 input Out 2 (+) 12 Ch 2 output (+)
Note: AN7523 is pin 1 to 9,AN7522 is pin 1 to 12.
Function POWER MENU TV/AV V- V+ P- P+
Voltage 0 0.4125 0.825 1.2375 1.65 2.0625 2.475
12
LA78040/78045 Function:vertical output
Symbol PIN Function Symbol PIN Function
INV IN 1 Input V OUT 5 Vertical output
VCC1 2 Power VCC2 6 Output power supply
PUMP UP 3 Pump up power NON INV IN 7 Negative feedback
GND 4 Ground
TDA9859 Function:Universal Sound processor
Symbol Pin Function Symbol Pin Function
AV1L 1 AV1 Audio Left input AV1R 32 AV1 Audio input Right
P1 2 Not used P2 31 Not used
MAINL 3 Main Audio Left input AV2R 30 AV2 Audio input Right
CSMO 4 Smoothing Capacitor CPS1 29 Pseudo stereo Cap. 1
MAINR 5 Main Audio Right input AV2L 28 AV2 Audio input Left
VP 6 Power Supply CPS2 27 Pseudo stereo Cap. 2
OUT R 7 Right Output OUT L 26 Left Output
GND 8 Ground MAD 25 Not used (GND)
LINOR 9 Line Output Right LINOL 24 Line Output Left
LINIR 10 Line Input Right LINIL 23 Line Input Left
CBR1 11 Bass Cap. Right 1 CBL1 22 Bass Cap. Left 1
CBR2 12 Bass Cap. Right 2 CBL2 21 Bass Cap. Left 2
Headphone R 13 Headphone-R output Headphone L 20 Headphone-L output
CTR 14 Treble Cap. Right CTL 19 Treble Cap. Left
MAINOR 15 Main Audio out Right MAINOL 18 Main Audio out Left
SCL 16 I2C Bus clock SDA 17 I2C Bus data
6. Test point Waveforms
V451 C
5Vpp
0.9Vpp
1000Vpp
1.3V
pp
H H
1Vpp
V H
H
CRTKB
CRTKGCRTKR
95Vpp
95Vpp
95Vpp
H H H
T511PIN7
HEATER
300Vpp
22Vpp
H H
V451 B
2.7Vpp
3
2KH
TDA93XX
PIN53
2.5Vpp
2.5Vpp
3.8Vpp
H H
H
TDA93XX
PIN52
TDA93XX
PIN51
TDA93XX
PIN33
TDA93XX
PIN34
0.8Vpp
V
TDA93XX
PIN21
TDA93XX
PIN22
TDA93XX
PIN59
1.2Vpp
2.6Vpp
H H
TDA93XX
PIN40
TDA93XX
PIN38
13
7. IC voltages
TDA93XX
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
V 2.8 3.8 3.6 3.3 3.5 3.5 0.1 0.1 0 5.4 0.1 0 2.3 8 5 3
PIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
V 4 0 4 0.9 0.7 0.8 1.9 1.9 3.9 3.8 1.6 3.2 3.4 0 2.4 0.1
PIN 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
V 0.6 0.5 3.7 1.7 2.4 3.1 8 3.8 0 3.4 1.5 3.6 2.3 2.6 2.6 2.6
PIN 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
V 2.3 7.2 2.7 2.7 2.7 3.5 0 3.5 0.1 1.7 1.8 0 3.5 0.1 0.1 5
LA76040
PIN 1 2 3 4 5 6 7
V 0.7 15 -12 -15 0.3 15.9 -0.07
AN 7522
PIN 1 2 3 4 5 6 7 8 9 10 11 12
V 12 7 0 7 3.3 1.4 0 1.4 0 7 0 7
TDA9859
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14
V 4.0 0 4.0 8.0 4.0 8.0 4.0 0 4.0 4.0 4.0 4.0 4.0 4.0
PIN 15 16 17 18 19 20 21 22 23 24 25 26 27 28
V 4.0 4.5 4.6 4.0 4.0 4.0 4.0 4.0 4.0 4.0 0 4.0 4.0 4.0
PIN 29 30 31 32
V 4.0 4.0 0 4.0
14
8. PURITY / CONVERGENCE ADJUSTMENT
PURITY ADJUSTMENT
1. Demagnetize CRT with the demagnetizer.
2. Loosen the retainer screw of the deflection yoke.
3. Remove the wedges.
4. Input a green raster signal from the signal generator,
and turn the screen to green raster.
5. Move the deflection yoke backward.
6. Bring the long lug of the purity magnets on the short
lug and position them horizontally. (Fig2)
7. Adjust the gap between two lugs so that the GREEN
RASTER will come into the center of the screen. (Fig.
3)
8. Move the deflection yoke forward, and fix the position
of the deflection yoke so that the whole screen will
become green.
9. Insert the wedge to the top side of the deflection yoke
so that it will not move.
10. Imput a crosshatch signal.
11. Verify that the screen is horizontal.
12. Input red and blue raster signals, and make sure that
purity is properly adjusted.
CRT
WEDGE
DEFLECTION
YOKE
P
4 6
P: PURITY MAGNET
4: 4-POLES (convergence magnets)
6: 6-POLES (convergence magnets)
P/C MAGNETS
Fig. 1
PURITY MAGNETS
Long lug
Short lug
Bring the long lug over the short lug
and position them horizontally.
Fig.2
(FRONT VIEW)
GREEN RASTER
CENTER
Fig.3
15
STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal.
2. Using 4-pole convergence magnets, overlap the red and
blue lines in the center of the screen (Fig. 1) and turn
them to magenta (red/blue).
3. Using 6-pole convergence magnets, overlap the magenta
(red/blue) and green lines in the center of the screen and
turn them to white.
4. Repeat 2 and 3 above, and make the best convergence.
DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down and overlap lines
in the periphery. (Fig. 2)
2. Move the deflection yoke left to right and overlap the
lines in the periphery. (Fig. 3)
3. Repeat 1 and 2 above, and make the best convergence.
After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke.
Fix the 6 magnets with glue.
(FRONT VIEW)
Fig. 1
(FRONT VIEW)
RED GREEN BLUE
BLUE
RED
GREEN
GREEN
RED
BLUE
BLUE GREEN RED
Fig.2
(FRONT VIEW)
RED GREEN BLUE BLUE
GREEN RED
RED
GREEN
BLUE
BLUE
GREEN
RED
Fi
g
. 3
16
9. List of Parts
NAME TYPE Q'TY REMARK
CU-2988（AUSTRALIA）
PC BOARD MODULE 1
CRT BOARD MODULE 1
KEY AND REMOTE CONTROL BOARD MODULE
PRINTED CIRCUIT BOARD
TOUCH SWITCH KFC-A06-21050 1
TOUCH SWITCH KFC-A06-21050 1
TOUCH SWITCH KFC-A06-21050 1
TOUCH SWITCH KFC-A06-21050 1
TOUCH SWITCH KFC-A06-21050 1
TOUCH SWITCH KFC-A06-21050 1
CARBON FILM RESISTOR RT13-1/6W-470Ω-J-T52 1
CARBON FILM RESISTOR RT13-1/6W-560Ω-J-T52 1
CARBON FILM RESISTOR RT13-1/6W-1KΩ-J-T52 1
CARBON FILM RESISTOR RT13-1/6W-1.2KΩ-J-T52 1
CARBON FILM RESISTOR RT13-1/6W-1.8KΩ-J-T52 1
CARBON FILM RESISTOR RT13-1/6W-390Ω-J-T52 1
LED BT205-L 1
INRARED RECEIVER HS0038A IMPORTATION 1
WIRE WIRE
1
FRONT AV MODULE
PRINTED CIRCUIT BOARD FRONT AV BOARD 1
AV SOCKET AV3-8.35-6AK 1
WIRE WIRE
1
FRONT FRAME MODULE BJK4076-----Q 1
FRONT FRAME ASSEMBLY MTAA4086AA--Q 1
FRONT FRAME (ABS) MTAA4098AA--Q 1
LIGHT CONDUCTION COLUMN MTAH4057AA--Q 1
BOLT SJ2825-87 ST3X8F 1
FUNCTION KEY MTAH4055AA--Q 1
BOLT SJ2825-87 ST3X8F 2
POWER BUTTON MTAH4056AA--Q 1
SPRING MTBH4090BC--Q 1
CRT TRESTLE MTAH4058AA--Q 2
CRT BRACKET 4
BOLT SJ2824-87 ST4X16F 20
SPEAKER YDT0813-10W-8Ω-01 2
BOLT SJ2824-87 ST4X12F 8
METAL SCUTCHEON Haier 49mm ARGENTINE 1
WIRE WIRE 1
BACK COVER MODULE BJH4075-----Q 1
BACK COVER ASSEMBLY MTAA4078AB--Q 1
BACK COVER MTAA4092AB--Q 1
17
INTEGER MATERIEL MODULE BJZ4078-----Q 1
RUBBER TRAY H=3mm 4
DEGUASSING COIL TIE MTAJ1001AG--Q 4
NUT M6 ASSEMBLED NUT 4
101 HIGHVOLTAGE CLAMP TEM101 1
411 CLAMPER MTAJ3000AA--Q 2
POWER BUTTON CLAMPER MTAH4060AA--Q 1
TERMINAL BOARD MTAH4059AC--Q 1
POTHOOK MTAH4059AA--Q 1
BOLT SJ2824-87 ST4X12F 2
BOLT SJ2825-87 ST3X12F 2
BOLT SJ2824-87 ST4X16F 10
BOLT SJ2824-87 ST4X16F 6
PAD (TOP) MTEA4058----Q 1
PAD (BOTTOM) MTEA4059----Q 1
WIRE 60mm 1
CRT M68LWF188X50 1
DEGUASSING COIL 1
GROUNDING WIRE 1
GAUCHE CONNECTING WIRE 1
BRACKET MODULE BXY4069-----Q
BRACKET MTAC4068AA--Q 1
BOLT SJ2825-87 ST3X10F
FBT TRANSFORMER TRESTLE MTAC4072AC--Q 1
BOLT SJ2824-87 ST4X12F 2
POWER CABLE PRE-WORKING MODULE
POWER BUTTON CAP MTAB0014AA--Q 1
POWER CABLE 1
POWER SWITCH 1
POWER TRANSMITTING WIRE 1
PACKING ARK MODULE 1
POWER CABLE PLASTIC BAG 1
WIRE 60mm 1
OPERATION INTRODUCTIONS（ENGLISH）1
TEAC PROPAGANDIZE PAGE 1
POP STATIC FILM （ENGLISH）1
BATTERY 5# 2
REMOTE CONTROL 1
OPERATION INTRODUCTIONS PLASTIC BAG 1
29“90 SERIES INTEGER PLASTIC BAG 1
PACKING ARK 1
ENCASEMENT NAIL 20
BACK COVER LABEL 1
TRANSPORT SCUTCHEON 2
18
Mainboard element list
r01n r14 r02 ra
TF-0090----1J 1 T451
RCD152K-NACNH 3 1/2W 1.5K R918 R928 R938
RDB100J-NAATD 3 1/6W 10 R312 R801 R871
RDB101J-NAATD 8 1/6W 100
R301 R302 R363 R365 R366 R381
R382 R383
8
R401 R402 R452 R723 R724 R743
R815 R824
2 R861 R862
RDB102J-NAATD 8 1/6W 1K
R128 R129 R369 R460 R464 R481
R531 R541
8
R544 R712 R734 R802 R803 R807
R816 R818
2 R825 R827
RDB103J-NAATD 8 1/6W 10K
R126 R127 R163 R380 R395 R396
R461 R543
8
R548 R551 R704 R705 R706 R707
R709 R816A
8
R818AR825AR827AR851AR852AR912
R922 R932
RDB104J-NAATD 5 1/6W 100K R441 R444 R483 R802AR803A
RDB122J-NAATD 3 1/6W 1.2K R305 R560 R713
RDB151J-NAATD 3 1/6W 150 R815AR848 R852
RDB152J-NAATD 2 1/6W 1.5K R397 R732
RDB153J-NAATD 1 1/6W 15K R331
RDB154J-NAATD 1 1/6W 150K R318
RDB181J-NAATD 1 1/6W 180 R353
RDB182J-NAATD 3 1/6W 1.8K R403 R405 R714
RDB183J-NAATD 1 1/6W 18K R162
RDB220J-NAATD 3 1/6W 22 R914 R924 R934
RDB221J-NAATD 5 1/6W 220 R311 R442 R917 R927 R937
RDB222J-NAATD 6 1/6W 2.2K R351 R371 R451 R540 R701AR804
RDB223J-NAATD 2 1/6W 22K R384 R455
RDB242J-NAATD 1 1/6W 2.4K R515
RDB272J-NAATD 2 1/6W 2.7K R321 R512
RDB273J-NAATD 2 1/6W 27K R484 R487
RDB274J-NAATD 1 1/6W 270K R174
RDB301J-NAATD 3 1/6W 300 R913 R923 R933
RDB330J-NAATD 2 1/6W 33 R398 R806
RDB331J-NAATD 3 1/6W 330 R916 R926 R936
RDB332J-NAATD 8 1/6W 3.3K
R702 R721 R722 R728 R735 R736
R737 R741
1 R742
RDB333J-NAATD 5 1/6W 33K R171 R175 R317 R385 R434
RDB391J-NAATD 2 1/6W 390 R322 R775
RDB392J-NAATD 1 1/6W 3.9K R462
RDB470J-NAATD 5 1/6W 47 R368 R708 R911 R921 R931
RDB471J-NAATD 2 1/6W 470 R308 R710
RDB472J-NAATD 7 1/6W 4.7K
R131 R133 R154 R158 R306 R443
R733
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