The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to alert
the user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may
be of sufficient magnitude to constitute a risk of
electric shock to persons.
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR BACK). NO
USER-SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL
ONL Y.
PRECAUTIONS DURING SERVICING
1.In addition to safety, other parts and assemblies are
specified for conformance with such regulations as
those applying to spurious radiation. These must
also be replaced only with specified replacements.
Examples: RF converters, tuner units, antenna
selection switches, RF cables, noise-blocking
capacitors, noise-blocking filters, etc.
2.Use specified internal Wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
3.Use specified insulating materials for hazardous
live parts. Note especially:
1) Insulating Tape
2) PVC tubing
3) Spacers (insulating barriers)
4) Insulating sheets for transistors
5) Plastic screws for fixing micro switches
4.When replacing AC primary side components
(transformers, power cords, noise blocking
capacitors, etc.), wrap ends of wires securely about
the terminals before soldering.
5.Make sure that wires do not contact heat generating
parts (heat sinks, oxide metal film resistors, fusible
resistors, etc.)
6.Check if replaced wires do not contact sharply edged
or pointed parts.
7.Make sure that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
MAKE YOUR CONTRIBUTION TO
PROTECT THE ENVIRONMENT
Used batteries with the ISO symbol
for recycling as well as small
accumulators (rechargeable batteries), mini-batteries
(cells) and starter batteries should not be thrown
into the garbage can.
Please leave them at an appropriate depot.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
WARNING:
Before servicing this TV receiver, read the X-RAY
RADIATION PRECAUTION, SAFETY INSTRUCTION
and PRODUCT SAFETY NOTICE.
X-RAY RADIATION PRECAUTION
1.Excessively high can produce potentially hazardous
X-RAY RADIATION. To avoid such hazards, the high
voltage must not exceed the specified limit. The
normal value of the high voltage of this TV receiver
is 27 KV at zero bean current (minimum brightness).
The high voltage must not exceed 30 KV under any
circumstances. Each time when a receiver requires
servicing, the high voltage should be checked. The
reading of the high voltage is recommended to be
recorded as a part of the service record, It is
important to use an accurate and reliable high
voltage meter.
2.The only source of X-RAY RADIATION in this TV
receiver is the picture tube. For continued X-RAY
RADIATION protection, the replacement tube must
be exactly the same type as specified in the parts
list.
3.Some parts in this TV receiver have special safety
related characteristics for X-RADIATION protection.
For continued safety, the parts replacement should
be under taken only after referring the PRODUCT
SAFETY NOTICE.
SAFETY INSTRUCTION
The service should not be attempted by anyone
unfamiliar with the necessary instructions on this TV
receiver. The following are the necessary instructions
to be observed before servicing.
1.An isolation transformer should be connected in the
power line between the receiver and the AC line
when a service is performed on the primary of the
converter transformer of the set.
2.Comply with all caution and safety related provided
on the back of the cabinet, inside the cabinet, on the
chassis or picture tube.
1
3.To avoid a shock hazard, always discharge the
picture tube's anode to the chassis ground before
removing the anode cap.
4.Completely discharge the high potential voltage of
the picture tube before handling. The picture tube is
a vacuum and if broken, the glass will explode.
5.When replacing a MAIN PCB in the cabinet, always
be certain that all protective are installed properly
such as control knobs, adjustment covers or shields,
barriers, isolation resistor networks etc.
6.When servicing is required, observe the original lead
dressing. Extra precaution should be given to assure
correct lead dressing in the high voltage area.
7.Keep wires away from high voltage or high tempera
ture components.
8.Before returning the set to the customer, always
perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas,
terminals, screwheads, metal overlay, control shafts,
etc., to be sure the set is safe to operate without
danger of electrical shock. Plug the AC line cord
directly to the AC outlet (do not use a line isolation
transformer during this check). Use an AC voltmeter
having 5K ohms volt sensitivity or more in the
following manner.
Connect a 1.5K ohm 10 watt resistor paralleled by a
0.15µF AC type capacitor, between a good earth
ground (water pipe, conductor etc.,) and the exposed
metallic parts, one at a time.
Measure the AC voltage across the combination of
the 1.5K ohm resistor and 0.15 uF capacitor. Reverse
the AC plug at the AC outlet and repeat the AC
voltage measurements for each exposed metallic
part.
The measured voltage must not exceed 0.3V RMS.
This corresponds to 0.5mA AC. Any value exceeding
this limit constitutes a potential shock hazard and
must be corrected immediately.
The resistance measurement should be done
between accessible exposed metal parts and power
cord plug prongs with the power switch "ON". The
resistance should be more than 6M ohms.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this TV
receiver have special safety-related characteristics.
These characteristics are offer passed unnoticed by
visual spection and the protection afforded by them
cannot necessarily be obtained by using replacement
components rates for a higher voltage, wattage, etc.
The replacement parts which have these special
safety characteristics are identified by
the schematic diagram and on the parts list.
Before replacing any of these components, read the
parts list in this manual carefully. The use of
substitute replacement parts which do not have the
same safety characteristics as specified in the parts
list may create shock, fire, X-RAY RADIATION or
other hazards.
marks on
Good earth ground
such as the water
pipe, conductor,
etc.
27.5≤30KV For 25”
27Audio frequence response±3dB ref. to 1KHz0.2~100.2~10KHz
28Audio output power1KHz 10% THD2x7.5≥2x7.5W For 34”
50KHz DEV. (BG/I/DK)2x5≥2x5W For 25” 29”
25KHz DEV. (M/N)
2
For 29” 34”
2
For 25”
3
No. ItemsInstructionTypicalLimitUnit
29THDPo=0.5W 1KHz1≤3%
30Signal to buzz ratio42≥40dB
31Minimum volume hum6≤10mVrms
32Maximum woofer output powerN/AN/AW
33Woofer audio freqency response±3dB ref. to 80Hz AV modeN/AN/AHz
34Bass control range100Hz ref. to 1KHz AV modeN/AN/AdB
35Treble control range10KHz ref. to 1KHz AV modeN/AN/AdB
36BalanceCenterN/AN/A
1Picture Modulation87.5%
2Sound Modulation27KHz Dev. For DK/I/BG
15KHz Dev. For M/N
3Picture to Sound Ration10dB
4Sound Artificial Load Resistor8 ohm
5Video signalWhite and black
(three white & two black)
6Audio signal1KHz sine wave 0.5Wrms
7Conditions of the TV setting:screen
A. Switch TV on and let it warm up for more than 30 minutes.
B. Connect RMS volt meter to speaker terminals and adjust theTV volume to get 500mW RMS power at each terminal.
C. Place the MINOLTA CA-100 test probe to white part of the screen,adjust the contrast until a reading of 80cd/m
is obtained.
D. Place the MINOLTA CA-100 test probe to black part of the screen,adjust the brightness until a reading of 2cd/m
is obtained.
E. Repeat step C & D until the exact luminance values is obtained or the nearest possible values you can get.then
record the luminance values & R.G.B gun voltage values at the same time. and take the largest values for
measurement referenct.
F. Input standard color bar(100/0/75/0),then adjust the colour.until the waveforms at the blue gun of same level
is obtained.
+P8P5+
+P1
1/9H
+P4P2++P0
+P7P6+
+P3
H
1/9W
W
Convergence error test point on
2
2
4
III. Level List of Equipments & Instruments Required for Production
No. DesignationRequirementReference ModelRemark
1Pattern GeneratorSystem of output signal:PHILIPS
RF out: PAL BG/SUB/DK/I,PM5518-TN
SECAM B/G/D/K, NTSC MPM5418-TN
Video out: NTSC 4.43/3.58 PAL 60Hz
2Digital voltmeterInput Resistance 10MFLUKE 45
3WithstandingWithstanding Voltage:KIKUSUI TOS 8650Irresistible Voltage Measure
Voltage TesterAC 1.5KV, 5KV/0-5KV ± 3%
Cut-off current: AC 0-2mA,
20mA / continuously Adjustable
4Insulation TesterTest voltage:1000V. 500VKIKUSUI TOS 7100L
5Sine wave SignalFrequency Range: 0.1~140MHzLEADER 3216For generating IF Signal
Generator( Precision:10KHz )
Level Range: -20~126dB
6OscilloscopeFrequency response: 20MHz or above
7CRT ColorMINOLTA CA-100For White Balance Adjustment
Analyzer
8DC RegulatedMax output Voltage
Power Supply
9Color MonitorAV receiving system: Should includeSame model (of TV set)For operation check
all the AV output system of theas the productsFor resolution check
products at least.For Skew Check
10 Audio SignalFrequency of output signal:KENWOOD AG-203AFor generating audio signal
Generator20Hz-20kHz
14VSupply DC power
IV. Applying Adhesive on Main PCB
Note: The ref. No. from 1 to 10 should be applied one Diabond 1603HFR Ivony Adhesive for each.
5
V. Wiring Diagram
A. For model 34E2ABN88
6
B. For models 25A9/29A9ABN88
7
C. For model 25B8ABN88
8
D. For model 29B8ABN88
9
VI. Block Diagram
10
VII. Disassembly
In case of trouble, etc., necessitating disassemble, please disassemble in the order shown in the illustrations. Reassemble in the reverse order.
1.Removal of the Back Cover
2.Removal of the MAIN PCB
a. Remove the screws.
b. Slide out the TV chassis slightly; pull up the connector of AC cord from PCB; pull up the CRT PCB from
CRT.
c. Remove the anode cap from the picture tube. To avaid a shock hazard, be sure to discharge the picture
tube’s anode to the chassis ground before removal.
d. Take out the TV chassis.
VIII. Input Signals & Equipments List for Alignment
A.Equipments List
1. Pattern Generator2. Digital Voltmeter3. High Voltage Meter
4. Sine Wave Signal Generator5. Demagnetizer6. Personal Computer (486)
7. DC Regulated Power Supply8. Oscilloscope9. CRT Colour Analyzer
B. Input Signals
1. Philips Pattern2. Color Bar3. Cross Hatch
4. Grey Scale Bar5. Monoscope Pattern6. Moving Picture With Sound
11
IX. E2PROM (IC602) Setting
A. Option Code
The option code listed below is for selection of different TV systems, features and functions, the code is preset in
factory, in case of changing the EEPROM, the option code will not be the same as before. In this case, it is
necessary to adjust the option code again. How to set the option code by hand is described in “method to enter
into SERVICE MENU and ADJUST MENU”. Please refer to “IV. Electrical Adjustment”.
9NULL
10OSYS10 = SINGLE COLOR SYSTEM (PAL) AVAILABLE
1 = MULTI COLOR SYSTEM(AUTO/PAL)AVAILABLE
11OSYS20 = MULTI SYSTEM SECAM NOT AVAILABLE (TV & AV)
1 = MULTI SYSTEM SECAM AVAILABLE (TV & AV)
12OSYS30 = MULTI SYSTEM NTSC NOT AVAILABLE (TV)
1 = MULTI SYSTEM NTSC AVAILABLE (TV)
Digit 4:
13NULL
14/15/16TUNER IFSETUPOTUN1OTUN2OTUN3
34.47MHz000
36.875MHz001
38MHz010
38.9MHz011
39.5MHz100
45.75MHz101
Digit 5
17NULL
18OBL0 = BILINGUAL (MAIN/SUB) NOT AVAILABLE
1 = BILINGUAL (MAIN/SUB) AVAILABLE
19OSND10 = MULTI SIF SYSTEM AVAILABLE
1 = SINGLE SIF SYSTEM AVAILABLE
— THIS OPTION IS NOT COUNT BILINGUAL
12
20OSNDB0 = SIF [BG] NOT AVAILABLE
1 = SIF [BG] AVAILABLE
Digit 6:
21NULL
22OSNDI0 = SIF [I] NOT AVAILABLE
1 = SIF [I] AVAILABLE
23OSNDD0 = SIF [DK] NOT AVAILABLE
1 = SIF [DK] AVAILABLE
24OSNDM0 = SIF [M] NOT AVAILABLE
1 = SIF [M] AVAILABLE
Digit 7:
25NULL
26NULL
27OBB0 = BLUE BACK NOT AVAILABLE
1 = BLUE BACK AVAILABLE
28OTVO0 = SCART MONITOR OUTPUT
1 = SCART TV OUTPUT
Digit 8:
29NUL
30OCHIT0 = RUSSIA OSD NOT AVAILABLE
1 = RUSSIA OSD AVAILABLE
31OCHIS0 = SIMPLE CHINESE (CHINA) OSD NOT AVAILABLE
1 = SIMPLE CHINESE (CHINA) OSD AVAILABLE
32OENG0 = ENGLISH OSD NOT AVAILABLE
1 = ENGLISH OSD AVAILABLE
Digit 9:
33ODKSIF0 = DK SIF INTERNAL
1 = DK SIF EXTERNAL
34OMSIF0 = M SIF INTERNAL
1 = M SIF EXTERNAL
35OBGSIF0 = B G SIF INTERNAL
1 = BG SIF EXTERNAL
36OISIF0 = I SIF INTERNAL
1 = I SIF EXTERNAL
Digit 10:
37SRS0 = SRS NOT AVAILABLE
1 = SRS AVAILABLE
38TONE0 = TONE NOT AVAILABLE
1 = TONE AVAILABLE
39NICAM0 = NICAM NOT AVAILABLE
1 = NICAM AVAILABLE
40TEXT0 = TELETEXT NOT AVAILABLE
1 = TELETEXT AVAILABLE
B.Data Setting
The data setting item B~D is the initialization data preset in the EEPROM before adjustment in case of
changing the EEPROM, please set the data to initialization data listed below before adjustment. How to set
the data by hand is described in “method to enter into SERVICE MENU and ADJUST MENU”. Please refer
to “IV. Electrical Adjustment”.
Remark1:For different CRT, the following data are recommended to change for better performance before
alignment. These Data Settings are listed as following:
CRTCRT Type No.Value
VER.LINVER.SCURVER.LIN60VER.SC60
34”E6101-082005A80LJF60X10(C) N140224022
SEG
Remark2: ISUD5 must set to “0”. Please check ISUD5 after read 5198. If ISUD5 is “1”, please set to “0”.
Remark3: PAL or NTSC VER.POS only can select 0 or 1.
Remark4: C-Y:0 For MS models(using NN5198K)C-Y:1 For other models(using NN5199K or NN5099K)
Remark5:
MODELSWMODE
25A9/29A9/25B8/29B8/34E2ABN880
C.Intelligent picture control (I.P.C) DATA SETTING
Note: Please refer to the CRT conversion table for other CRT.
b. Adjustment Step
Adjust VR901 (or VR902) to make the read-out on the Voltmeter to be +B±0.3V.
ii. Method to enter into SERVICE MENU and ADJUST MENU
a. Turn on the Main Power Switch, then press volume buttons both "+" and "-" simultaneously for over 5 seconds,
the "KWTVxx SERVICE" will be displayed on the screen.Press “MENU” key (on the unit or the remote control)
to select “SERVICE” , “AFT-SET” , “IPC SET” or “OTHER” MENU.
b. The “KWTVxx SERVICE” menu is indicated with each item on the
screen. The item can be selected by pressing channel “
keys.Press volume “+” and “-” keys to change the parameter value.
c. AFT-Step
Selecting “AFT-SET” to set AFT DATA, on-screen display will be shown as:
Use channel “ ” and “ ” keys to select the parameter, the
parameter value can be changed by pressing volume “+” and “-”
keys. See “AFT data setting”. Press “MENU” key to exit.
d. IPC
Press “MENU” key to selecting “IPC-SET” to set picture mode data, the picture mode data is indicated with
each parameter on the screen. On-screen display will be shown as:
Press volume “+” and ”-” keys to select picture mode, then select
the parameter and change the parameter value. When all picture
mode data is being set, press “MENU” key to exit.
e. Press “MENU” key,select “Other”,on-screen display will be shown as following:
KWTVxx OTHERx-xx
Productionon
Optionxxxxxxxxxx
Read 5198CNT: x
1). Production
The function of ”Production” is for production aging purpose. When no RF signal input and if it is set
to “on”, the TV set will not be blue back and standby shortly. When the TV set is finished, it must be
set to “off”. If it is set to “on”, a character “P” will appear on the top of the screen when changing
channel, this means that it is set for production purpose. By pressing the volume “+” and “-” keys,
“Production” can be set to “off” or “on”. By pressing the “MENU” ,it will exit the “OTHER” menu.
2) Option
Selecting “Option”, input the option code by number keys on the remote handset according to the
“Option code”.Then pess “MENU” to store. After changing “OPTION”, the TV set must be set to
standby and power on again, then enter into “SERVICE MENU”.
15
Loading...
+ 32 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.