In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
CX34K3
FEATURE
Ë
NTSC (AV thru)
Ë
Full Auto Channel Preset and Auto Channel Skip
Ë
100 CH Program Memory
Ë
CATV (Hyper Band) Ready
〈Use Frequency Synthesizer Tuner〉
Ë
AVL (Sound Keeper) Function
Ë
High Contrast Picture (Black Stretch Circuit)
Ë
ON Timer/Sleep Timer/Reminder Timer
Ë
Blue Back Noise Mute
Ë
Front AV In and Rear AV In/Out Terminals
Ë
Colour-Comb Filter (NTSC AV In)
Ë
Hotel Mode
Ë
Front Headphone Jack
Ë
Multi Language OSD (English/Chinese/French/
Arabic/Malay/Russian)
HEADPHONE UNIT ..................................... 38
Ë
SUPPLIED ACCESSORIES ........................39
Ë
PACKING PA RTS .........................................39
Ë
CABINET PARTS .........................................39
Page
WARNING
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user – serviceable
parts inside. Refer servicing to qualified service personnel.
SHARP CORPORATION
1
SPECIFICATIONS
CX34K3
Convergence ................................................................................. Self Converging System
Dimensions ..............................................................................................Width: 357.0 mm
Cabinet Material ................................................................................................. All Plastics
Specifications are subject to change without prior notice.
NZ1 thru NZ11 ch
Height: 361.0 mm
Depth: 369.0 mm
Weight (Approx.):9.2 kg
IMPORTANT SER VICE NOTES
Maintenance and repair of this receiver should be done by
qualified service personnel only.
SERVICING OF HIGH VOLTAGE SYSTEM AND
PICTURE TUBE
When servicing the high voltage system, remove static charge from it by
connecting a 10k ohm Resistor in series with an insulated wire (such as a
test probe) between picture tube dag and 2nd anode lead. (AC line cord
should be disconnected from AC outlet.)
1. Picture tube in this receiver employs integral implosion pr otection.
2. Replace with tube of the same type number for contin ued safety.
3. Do not lift picture tube by the nec k.
4. Handle the picture tube only when wearing shatterproof gog gles and after
discharging the high voltage completely
X-RAY
This receiver is designed so that any X-Ray radiation is kept to an absolute
minimum. Since certain malfunctions or servicing may produce potentiall y
hazardous radiation with prolonged exposure at close range, the following
precautions should be observed:
1. When repairing the circuit, be sure not to increase the high v oltage to more
than 23.5 kV (at beam 0 µA) for the set.
2. To keep the set in a normal operation, be sure to make it function on 22.0 kV
±1.5 kV (at beam 800 µA) in the case of the set. The set has been factory –
Adjusted to the above-mentioned high voltage.
If there is a possibility that the high voltage fluctuates as a result of the
repairs, never forget to check for such high voltage after the work.
3. Do not substitute a picture tube with unauthorized types and/or brands
which may cause excess X-ray radiation.
BEFORE RETURNING THE RECEIVER
Before returning the receiver to the user, perf orm the following safety c hecks.
1. Inspect all lead dress to make certain that leads are not pinched or that
hardware is not lodged between the chassis and other metal parts in the
receiver.
2. Inspect all protective devices such as non-metallic control knobs, insulating
fishpapers, cabinet backs, adjustment and compar tment covers or shields,
isolation resistor-capacity networks, mechanical insulator s and etc.
2-12-2
ADJUSTMENT PRECAUTIONS
Ë
SERVICE MODE
This model’s setting are adjusted in two different ways: though the I2C bus control and in the
conventional analog manner. The adjustments via the I2C bus control include preset-only
items and variable data.
1. Setting the service mode by the microprocessor.
1 Make a short-circuit JA122 and JA124 for a second and release to switch to the service
mode position and the microprocessor is in input mode. (Adjustment through the I2C bus
control). (Use JWS Key to set as well).
2 Press the CH DOWN / UP key on the remote controller to get ready to select the mode
one by one.
3 Press the CH DOWN / UP key on the remote controller to select the modes reversibly
one by one.
4 Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.
5 Make a short-circuit JA122 and JA124 for a second and release to switch to the normal
mode (OFF) position and the microprocessor is in out of the service mode.
2. Factory Presetting.
1 Make a short-circuit JA122 and JA124 for a second and release to switch to the service
mode position and turn on the main power switch. Initial v alues are automatically preset,
only when a new EEPROM is used (Judge with the first 4 bytes).
3
2 The initial data are preset as listed in pages 4-6.
3 Make sure the data need modify or not (Initial data).
Note: Once the chassis has been assembly together and ready to be POWER ON for the
FIRST TIME, make sure to make a short-circuit JA122 and JA124 switch to the
service mode position first and then turn on the main power switch. (See 2-1 above).
Precaution: If haven’t done this initiation, it ma y possibl y generate excessive Beam
current.
3. For reference please check with memory map
(UA1 Series type RH-IX3368CE Attachment)
(1)In the Service Mode, Key is used to select the mode in the following order.
AGC &
GEOMETRIC
MODE
MISC.
OPTION
MODE
AGC &
GEOMETRIC
MODE
AGC TAKE OVER POINT (AGC)
VERTICAL SLOPE (V-LIN)
VERTICAL AMP (V-AMP)
VERTICAL SHIFT (V-CENT)
HORIZONTAL SHIFT (H-CENT)
S-CORRECTION (S-COR)
↓
↓
↓
↓
↓
↓
W.P. GREEN W ARM W.P.(DRI-GW)
WHITE POINT
ADJ.
MODE
IC
OPTION
MODE
WHITE POINT
ADJ.
MODE
W.P. RED STD. W.T. (DRI-RS)
W.P. GREEN STD. W.T.(DRI-GS)
W.P.BLUE STD. W.P. (DRI-BS)
W.P. RED W ARM W.P.(DRI-R W)
W.P. BLUE W ARM W.P.(DRI-BW)
W.P. RED COOL W.P.(DRI-RC)
W.P. GREEN COOL W.P.(DRI-GC)
W.P. BLUE COOL W.P. (DRI-BC)
↓
↓
↓
↓
↓
↓
↓
↓
↓
FORWARD : CH DOWN KEY
REVERSE : CH UP KEY
MAX VOLUME (SUB-VOL)
SUB CONTRAST (SUB-CON)
SUB COLOUR (SUB-COL)
SUB BRIGHTNESS (SUB-BRI)
SUB TINT (SUB-TINT)
SUB SHARPNESS (SUB-SHP)
MAX HOTEL VOLUME (HTL-VOL)
HOTEL PROGRAM NO(HTL-PRG)
OSD GRB REFERENCE (RGB)
BLACK LEVEL OFFSET R(CUT-R)
BLACK LEVEL OFFSET B(CUT-B)
CATHODE DRIVE LEVEL(CDL)
SUB
ADJ.
MODE
Y-DELAY
ADJ.
MODE
OFFSET
ADJ.
MODE
SUB
ADJ.
MODE
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
FORWARD : CH DOWN KEY
REVERSE : CH UP KEY
* ( ) means OSD display.
3-13-2
CX34K3
Y-DELAY
ADJ.
MODE
Y-D TIME FOR PAL (TV) (DL-PT)
Y-D TIME FOR SECAM (TV) (DL-ST)
Y-D TIME FOR N358 (TV) (DL-3T)
Y-D TIME FOR N443 (TV) (DL-4T)
Y-D TIME FOR B/W (TV) (DL-TV)
Y-D TIME FOR PAL (AV) (DL-PA)
Y-D TIME FOR SECAM (AV) (DL-SA)
Y-D TIME FOR N358 (AV) (DL-3A)
Y-D TIME FOR N443(AV) (DL-4A)
Y-D TIME FOR B/W (AV) (DL-AV)
SOUND SYSTEM M (S-M)
4
SOUND SYSTEM DK (S-DK)
SOUND SYSTEM I (S-I)
SOUND SYSTEM BG (S-BG)
PLAYBACK SECAM (P-SECAM)
FE (RF) NTSC 3.58 (F-N358)
FE (RF) NTSC 4.43 (F-N443)
FE (RF) SECAM (F-SECAM)
MALAY LANGUAGE (MAL)
CHINESE LANGUAGE (CHI)
FRENCH LANGUAGE (FRE)
RUSSIAN LANGUAGE (RUS)
FORCED V-SYNC SLICING LEVEL(FSL)
SYNC OF OSD (HP2)
RESERVED FOR LATAM :ODER:BRAZIL
/ARGENTINA (OBA)
↓
↓
↓
↓
↓
↓
↓
↓
A
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
B
IC
OPTION
MODE
VERTICAL SCAN DISABLE(VSD)
BLACK STRETCH (BKS)
AUTO V OLUME LEVELING(A VL)
FAST FILTER IF-PLL(FFI)
ENABLE VERTICAL GUARD (EVG)
EHT TRACKING MODE (EHT)
OVERSCAN SWITCH OFF(OSO)
AUTO COLOUR LIMIT(ACL)
FORCED COLOUR LIMIT(FCO)
IF AGC SPEED BIT 0 (AGC0)
IF AGC SPEED BIT 1 (AGC1)
FOA Time Constant-RF (FOA-FE)
FOB Time Constant-RF (FOB-FE)
FOA Time Constant-AV (FOA-AV)
FOB Time Constant-AV (FOB-AV)
↓
↓
↓
↓
↓
↓
↓
↓
↓
B
↓
BILINGUAL(BIL)
↓
↓
↓
↓
↓
↓
USER DATA IN SERVICE MODE
* While SERVICE mode ON, EEPROM DATA will switch to the service data.
Also, once SERVICE mode OFF, EEPROM will switch back to previous USER DATA.
* In the service mode, the user data establish as below,
MODEUSER DATA
CONTRASTMIN (1/60)
COLOURMIN (1/60)
BRIGHTNESSMIN (1/60)
TINTMIN (1/60)
SHARPNESSMIN (1/60)
WHITE TEMPSTANDARD
S-VOLUMEMIN (1/60)
BLUE BACKOFF
C SYSTEMAUTO
S SYSTEM*1
The flow of Mode lists as following,
* Direct Key-in Step1 Mode
RC COMMANDSERVICE-ITEM
FUNCTIONAGC
CONTRAST DOWNV-LIN
COLOUR DOWNV-AMP
BRIGHTNESS DOWNV-CENT
TINT DOWNH-CENT
SHARPNESS DOWNEW / /
SYSTEMHB
BLUEBACKS-COR
TIMERSUB-VOL
CONTRAST UPSUB-CON
COLOUR UPSUB-COL
BRIGHTNESS UPSUB-BRI
TINT UP TINTSUB TINT
SHARPNESS UPSUB-SHP
*1 : For each CH, before
changing service mode
setting.
CX34K3
4-14-2
After short JA122 & 124, and turn on the main power switch, read data from E2PROM
address 00H ~ 03H, and compare to the list below, if different, initialize the E2PROM.
Address : DataAddress : Data
00H: 55H02H: 43H
01H: 4FH03H: A1H
EEPROM ITEMSOSDDATA LENGTH
AGC TAKE OVER POINTAGC0~6314ADJ
VERTICAL SLOPEV-LIN0~6332ADJ
VERTICAL AMPLITUDEV-AMP0~6332ADJ
VERTICAL SHIFTV-CENT0~6332ADJ
HORIZONTAL SHIFTH-CENT0~6332ADJ
S-CORRECTIONS-COR0~630FIX
WHITE POINT RED STD WHITE TEMPDRI-RS0~6332FIX
WHITE POINT GREEN STD WHITE TEMPDRI-GS0~6332ADJ
WHITE POINT BLUE STD WHITE TEMPDRI-BS0~6332ADJ
WHITE POINT RED WARM WHITE TEMPDRI-RW0~6332FIX
WHITE POINT GREEN WARM WHITE TEMPDRI-GW0~6332FIX(DRI-GS)-7 DATA
WHITE POINT BLUE WARM WHITE TEMPDRI-BW0~6332FIX(DRI-BS)-7 DATA
WHITE POINT RED COOL WHITE TEMPDRI-RC0~6325FIX(DRI-BS)-7 DATA
WHITE POINT GREEN COOL WHITE TEMPDRI-GC0~6332FIX(DRI-GS)-7 DATA
WHITE POINT BLUE COOL WHITE TEMPDRI-BC0~6363FIX(DRI-BS)SAMEDATA
MAX VOLUMESUB-VOL0~6363FIX
SUB CONTRASTSUB-CON0~6363FIX
SUB COLOURSUB-COL0~6332ADJ
5
SUB BRIGHTNESSSUB-BRI0~6332ADJ
SUB TINTSUB-TINT0~6332ADJ
SUB SHARPNESSSUB-SHP0~6332 (20)ADJ*1
MAX HOTEL VOLUMEHTL-VOL0~6332ADJ
HOTEL PROGRAM NUMBERHTL-PRG
OSD GRB REFERENCERGB0~1515FIX
BLACK LEVEL OFF-SET RCUT-R0~158FIX
BLACK LEVEL OFF-SET BCUT-B0~158FIX
CATHODE DRIVE LEVELCDL0~150 (2)FIX*2
Y-DELAY TIME FOR PAL(TV) [YD]DL-PT0~1512FIX
Y-DELAY TIME FOR SECAM(TV) [YD]DL-ST0~1515FIX
Y-DELAY TIME FOR N358 (TV) [YD]DL-3T0~1512FIX
Y-DELAY TIME FOR N443 (TV) [YD]DL-4T0~1512FIX
Y-DELAY TIME FOR B/W (TV) [YD]DL-TV0~1512FIX
Y-DELAY TIME FOR PAL (AV) [YD]DL-PA0~1512FIX
Y-DELAY TIME FOR SECAM (AV) [YD]DL-SA0~1515FIX
Y-DELAY TIME FOR N358 (AV) [YD]DL-3A0~1512FIX
Y-DELAY TIME FOR N443 (AV) [YD]DL-4A0~1512FIX
Y-DELAY TIME FOR B/W (AV) [YD]DL-AV0~1512FIX
COLOUR OFFSET (PAL)COL-OP0~158FIX
COLOUR OFFSET (SECAM)COL-OS0~158FIX
COLOUR OFFSET (NTSC358)COL-030~154FIX
COLOUR OFFSET (NTSC443)COL-O40~154FIX
SHARPNESS OFFSET (PAL)SHP-OP0~158FIX
SHARPNESS OFFSET (SECAM)SHP-OS0~154FIX
0~99 OR>99FOR NONE
INITIAL DATA FIX/ADJ
255FIX
5-15-2
REMARK
EEPROM ITEMSOSDDATA LENGTH
SHARPNESS OFFSET (NTSC358)SHP-O30~1512FIX
SHARPNESS OFFSET (NTSC443)SHP-O40~158FIX
VERTICAL SCAN DISABLEVSD
BLACK STRETCHBKS
AUT OMATIC VOLUME LEVELINGAVL
FAST FILTER IF-PLLFFI
ENABLE VERTICAL GUARD (RGB BLANKING)EVG
EHT TRACKING MODE (HCO)EHT
OVERSCAN SWITCH OFFOSO
AUTO COLOUR LIMITACL
FORCED COLOUR LIMITFCO
SOUND SYSTEM MS-M
SOUND SYSTEM DKS-DK
SOUND SYSTEM IS-I
SOUND SYSTEM BGS-BG
PLAYBACK SECAMP-SECAM
FE (RF) NTSC 3.58F-N358
FE (RF) NTSC 4.43F-N443
FE (RF) SECAMF-SECAM
VIDEO MUTE AT IDENT LOSSVMI
VIDEO MUTE AT PROGRAM/SOURCE CHANGE
HOTEL MODEHTL
REDUCED FM DEMODULATOR GAIN FORBTSC SIGNAL
NUMBER OF EXTERNAL AV SOURCEAV
FM WINDOW SELECTIONFMWS
SOUND MUTE BIT 0SM0
SOUND MUTE BIT 1SM1
THAI LANGUAGETHA
ARABIC LANGUAGEARA
MALAY LANGUAGEMAL
CHINESE LANGUAGECHI
FRENCH LANGUAGEFRE
RUSSIAN LANGUAGERUS
FORCED V-SYNC SLICING LEVELFSL
SYNC OF OSDHP2
TUNER CPTCRT
BILINGUALBIL
IF AGC SPEED BIT 0AGC0
IF AGC SPEED BIT 1AGC1
PHI-1 TIME CONSTANT (RF)FOA-FE
PHI-1 TIME CONSTANT (RF)FOB-FE
PHI-1 TIME CONSTANT (OFF AIR)FOA-AV
PHI-1 TIME CONSTANT (OFF AIR)FOB-AV
(1)The following default data has been factory-set for the E2PROM.
LAST PROGRAM/CHANNEL1
FLASHBACK PROGARM/CH1
After pressing "MODEL SETTING", 0 Channel will be skipped.
ITEMSDATA SETTING
DIGIT1
C-SYSTEMAUTO
S-SYSTEM*1
SKIPOFF
AFCON
VOLUME1
CONTRAST60 (MAX)
COLOUR0 (CENTER)
BRIGHTNESS0 (CENTER)
TINT0 (CENTER)
SHARPNESS0 (CENTER)
WHITE TEMPST ANDARD
REMINDER TIMERIn-active, "--:--"
ON TIMERIn-active, "--:--"
OFF TIMERIn-active, "--:--"
LAST POWERPOWER-ON
LANGUAGEENGLISH
BLUE BACK MUTEOFF
HOTEL MODEOFF
0 CHANNEL SKIPON
CX34K3
6-16-2
PIF ADJUSTMENT
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
Tuner IFT
1
(PRESET)
2 RF-AGC
TAKE OVER
POINT
ADJUSTMENT
7
(I2C BUS
CONTROL)
1. Get the tuner ready to receive the E-9 CH
signal, but with no signal input.
Adjust the PLL data.
2. Connect the sweep generator's output cable
to the tuner antenna. (RF SWEEP)
3. Adjust the sw eep generator's to 80dBuV .
4. Connect the response lead (use LOW IMPEDANCE probe with wave detector; see Fig.1) to
the tuner's IF output terminal. (This terminal
must have the probe alone connected).
5. Set the RF AGC to 0 - 6 V with no saturation
with the waveform.
6. Adjust the tuner IF coil to obtain the wav ef orm
as shown in Fig. 2.
2. Connect the oscilloscope to TP210 (Tuner’s
AGC Terminal) as shown in Fig. 3.
Oscilloscope
0.1V
–
Bias box
+
–
» Bias box: About 4.5 V
TP210+
TV Set
Fig. 3
3. Call "AG" mode in service mode. Adjust the
"AG" bus data to obtain the Tuner output pin
drop 0.1 V below maximum voltage.
4. Change the antenna input signal to
63~67dBµV, and make sure there is no noise.
5. Turn up the input signal to 90~95 dBµV to be
sure that there is no cross modulation beat.
Oscilloscope
Note:
For the 50 ohm signal strength
gauge, when not using 50/75
impedance adapter, signal
strength is 52 ±1 dBµV(75 ohm
open), instead of 54 ±1 dBµV
(75 ohm open).
Precaution:
The loss of using impedance
adapter
1n60
10k
100k
75ohm
Fig. 1
E-9 CH
P C
Fig. 2
1000p
IF OUT
-1.5+/-0.8dB
PURITY ADJUSTMENT
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
PURITY ADJ.1. Receive the GREEN-ONLY signal. Adjust the
1
beam current to about 500 µA.
2. Degauss the CRT enough with the degausing
coil.
Note: Follow the Job Instruction Sheet to ad-
just the magnetic field.
Vertical Bv: +0.030 mT
(0.30 gauss)
Horizontal Bh : +0.020 mT
(0.20 gauss)
3. Maintain the purity magnet at the zero
magnetic field and keep the static convergence
roughly adjusted.
4. Observe the points a, b as shown in Fig. 4-1
through the microscope. Adjust the landing to
the rank A requirements.
5. Orient the raster rotation to 0 eastward.
6. Tighten up the deflection coil screws.
» Tightening torque: 108 ± 20 N (11 ±2 kgf)
7. Make sure the CRT corners landing meet the
A rank requirements. If not, stick the magnet
sheet to correct it.
Note: This adjustment must be done after
warming up the unit for 30 minutes
or longer with a beam current over
500 µA.
Note: Set the service mode by JA122 &
JA124 (short) then press factory process R/C RGB key to change to RGB
mono colour mode.
* For the following colours press R/C RGB k e y
to change.
Green-only
Blue-only
Signal-colour
screen cleared
Red-only
a
b
Fig. 4-1
A
B
A = B
Fig. 4-2
Rank "A"
(on the right of the CRT)
A
B
A = B
Fig. 4-3
Rank "A"
(on the left of the CRT)
* Press R/C RGB key for 1 second
in NORMAL MODE, the colour
will change to RGB mono colour
mode.
The TEXT K ey "R. G. Cy" K ey can
be directly use to change to other
colours screen.
7-17-2
CX34K3
CONVERGENCE ADJUSTMENT
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
1 CONVERGENCE
ADJ.
(To be done
after the purity
adjustment.)
8
1. Receive the "Crosshatch Pattern" signal.
2. Using the remote controller, call NORMAL
mode.
Static convergence
1. Turn the 4-pole magnet to a proper opening
angle in order to superpose the blue and red
colours.
2. Turn the 6-pole magnet to a proper opening
angle in order to superpose the green colour
over the blue and red colours.
Dynamic convergence
1. Adjust the convergence on the fringes of the
screen in the following steps.
a) Fig. 5-1: Drive the wedge at point "a" and
swing the deflection coil upward.
b) Fig. 5-2: Drive the wedge at points "b"
and "c" and swing the deflection coil
downward.
c) Fig. 5-3: Drive the "c" wedge deeper and
swing the deflection coil rightward.
d) Fig. 5-4: Drive the "b" wedge deeper and
swing the deflection coil leftward.
2. Fix all the wedges on the CRT and apply glass
tape over them.
3. Apply lacquer to the deflection yoke lock scre w ,
magnet unit (purity, 4-pole, 6-pole magnets)
and magnet unit lock screw.
Finally received the Red-only and Blue-only
signals to make sure there is no other colours
on the screen.
B
G
R
R
G
B
About
100°
Lacquer
Wedge
"b"
4-pole magnet
BGR
Fig. 5-1
RGB
Fig. 5-2
RGB
Fig. 5-3
BGR
Fig. 5-4
Wedge "a"
Fig. 5-5
6-pole magnet
CRT neck
B
G
R
R
G
B
About
100°
Wedge
"c"
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
CRT CUTOFF
1
ADJUSTMENT
2
C BUS
(I
CONTROL)
2 SUB-
BRIGHTNESS
ADJUSMENT
2
C BUS
(I
CONTROL)
3 WHITE
BALANCE
SERVICE
MODE ADJ.
2
C BUS
(I
CONTROL)
1. Switch TV to VIDEO mode, BLUE BACK OFF
with NO VIDEO signal.
2. Press R/C to set Picture Normal condition.
3. Connect the oscilloscope to Red OUT from
IC801.(TP851)
Range: 1 V/Div (DC)
Sweep: 5 msec/Div
4. Adjust SCREEN VR, so that the tip of signal
reach 3.0 +0.1 Vdc.
1. Call "SUB-BRI" in service mode. (Receive
Crosshatch pattern with 5 black level windows)
2. Adjust the "SUB BRIGHT" bus data in order
that the line 1, 2 and 3 have the same darkness
wherelse line 4 is slightly brighter than line 1,
2 and 3 and finally line 5 will be the brighter
than line 4.
1. Receive the "WHITE" Pattern with BURST
signal.
2. Press R/C to set Picture NORMAL condition.
3. Connect the DC miliammeter between the
TP602 (-) and TP603 (+).
4. Check Beam current should be around 1,100 µA.
5. Set it to service mode and adjust the " WPG"
(White Point-G), "WPB" (White Point-B) data
to have a colour temperature of 12,300°K
(white). * Note .
6. Receive "White" pattern, with BURST Signal, and
set Brightness Y by generator, to ** 10 cd/m
(Minolta CA-100) by reducing Luminate Y signal.
7. Adjust "CUT -R" & "CUT -G" to get 12,300°K. Then
go back normal mode (High Bright)** to check
colour temperature. If out of range, back to (1) .
Note: This adjustment must be done after
warming up the unit for 30 minutes
or longer with a beam current over
700µA.
4. Using the R/C call "SUB COL" in SERVICE
mode. Adjust SUB COLOUR b us data, so that
the 75% White & Red portions of PAL Colour
Bar be at the same level shown as Fig. 8.
5. Clear the SERVICE mode.
W
75%
Cy
G
Y 100%W
Fig. 8
Mg R
NTSC CHROMA ADJUSTMENT
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
1 SUB-TINT
2
(I
C BUS
CONTROL)
1. Receive the "NTSC3.58 Colour Bar" signal
through AV in.
2. Connect the oscilloscope to TP853 (Pin (5) of
P882) BLUE-OUT.
3. Call the "SUB-TINT" mode in ser vice mode.
Adjust the "SUB-TINT" bus data to obtain the
same level of wa veform shown as Fig. 9.
4. Clear the SER VICE mode.
SAME LEVEL
Y
W
Cy G Mg R
Fig. 9
B
PROTECTOR OPERATION CHECKING
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
1 BEAM
PROTECTOR
2H, V
PROTECTOR
3 Other
protectors
1. Receive "Monoscope Pattern" signal.
2. Set CONTRAST MAX.
3. Set BRIGHT MAX.
4. During the Collector & Emitter of Q883/5/7
short, make sure the protector ON and switch
to standby mode.
1. Receive "Monoscope Pattern" signal.
2. Connect output of Bias Box to D607 cathode
(R606 side).
3. Set voltage of Bias Bo x to 18V and make sure
the protector is not work.
4. Set voltage of Bias Box to 27V, and make sure
the protector is work.
1. Once finish rectified Electrolytic Capacitor short
testing in +B line, check all possible damaged
components on +B line.
(Use random selected set for inspection)
* Select one of Q883/5/7 to do
each short test.
A/V INPUT AND OUTPUT CHECKING
B
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
VIDEO AND
1
AUDIO OUTPUT CHECK
2 VIDEO AND
AUDIO INPUT
CHECK
1. Receive the "PAL Colour Bar" signal (100%
White Color Bar, Sound 400 Hz 100% Mod.)
2. Terminate the Video output with a 75 ohm impedance. Mak e sure the output is as specified
(1.0 Vp-p ±3 dB).
3. Terminate the Audio output with a 10k ohm impedance. Mak e sure the output is as specified
(1.76 Vp-p ±3 dB).
1. Using the TV/AV key on the remote controller,
make sure that the modes change in order of
TV , A V1, A V2 & TV again and the video & audio
output are according to the input terminal for
each mode.
CX34K3
9-19-2
FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
CONTRAST
1
key
2 COLOUR key1. Receive "Colour Bar" signal.
3 BRIGHTNESS
key
4 TINT key1. Receive the "NTSC Colour Bar" signal thru AV
1. Receive "Monoscope Pattern" signal.
2. Set P-Mode to select CONTRAST.
3. Press Volume Up/Down key to check whether
the CONTRAST effect is OK or not.
2. Set P-Mode to select COLOUR.
3. Press Volume Up/Down key to check whether
the COLOUR effect is OK or not.
1. Receive "Monoscope Pattern" signal.
2. Set P-Mode to select BRIGHTNESS.
3. Press Volume Up/Down key to check whether
the BRIGHTNESS effect is OK or not
in.
2. Set P-Mode to select TINT.
3. Press Volume Up/Down key to check TINT, UP
for GREEN direction and DOWN f or PURPLE
direction whether is OK or not.
FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
(Continued)
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
9
Colour
system
1. Receive the "PAL COLOUR BAR" signal, press
the COLOUR SYSTEM key to select modes
except PAL, check the COLOUR is not working
properly. Then, select the "PAL" mode. Check
again its colour so that it is working properly.
2. Receive "NTSC 4.43" signal, press COLOUR
SYSTEM key to select modes except NTSC
4.43, check the COLOUR is not working
properly. Then, select the "NTSC 4.43" mode.
Check again its colour so that it is working
properly.
3. Receive "NTSC 4.43/3.58 COLOUR BAR" signal thru AV, press COLOUR SYSTEM key to
select modes except N4.43/3.58, check the
COLOUR is not working properly. Then, select
the "NTSC 4.43/3.58" mode. Check again its
colour so that it is working properly.
CX34K3
10
5 SHARPNESS
Key
6 CH DISPLA Y
COLOUR
7 NORMAL Key1. Once in PICTURE Mode, and the NORMAL
8 White Temp1. Receive "Monoscope P attern" signal.
1. Receive "Monoscope Pattern" signal.
2. Set P-mode to select SHARPNESS.
3. Press Volume Up/Down key to check whether
the SHARPNESS effect is OK or not.
1. All Ch (1~99) will hav e an OSD display of the
channel number in green colour under AFT ON
condition.
key is pressed, all the settings will be present
to normal setting.
(Normal setting value for every mode).
» CONTRAST: MAX
» COLOUR: CENTER
» BRIGHTNESS : CENTER
» TINT: CENTER
» SHARPNESS : CENTER
2. Set FUNCTION to select WHITE TEMP.
3. Press Volume Up/Down key to check WHITE
TEMP Option, STANDARD:
NORMAL SETTING, WARM for more
REDDISH direction changing, COOL for more
BLUISH direction changing.
10-110-2
Note:If nothing is display mean
contrast, colour, bright, tint
or sharpness are all in normal setting.
10 NOISE MUTE
CHECKING
11 OSD
LANGUA GE
QUANTITY
CHECK
1. Receive "PAL COLOUR BAR" signal.
2. Turn up the volume control to maximum, make
sure the sound is heard from the speakers.
Then put the unit in no signal state.
3. Check the sound mute is effective.
4. Finally turn sound level of CTV to minimum.
Check OSD LANGUAGE quantity and type as
English, Russian, Chinese, French, Arabic and
Malay.
HEADPHONE JA CK CHECKING
NO. Adjustment partAdjusting procedure and conditionsWaveform and others
1 HEADPHONE
OUTPUT
CHECKING
1. Receive PAL COLOUR PAR with SOUND
400Hz, 100% MODULATION (±50kHz Dev).
2. Maximum volume, and check the headphone
output with 400Hz sound and no sound out
from speaker.