Contents Technical specifications & Safety precautions …… ……..…. Servicing precautions…………………………………….………. Functions & Location of controls …………………………..…. Brief operation instructions………………………………… …. Disassembly instructions………………………………………... A. Important notes………………………………………..B. Precautions for handling of picture tube…… ……..C. Exploded of cabinet parts………… ………………..…. Specific informations……………………………………………... A.
1. TECHNICAL SPECIFICATION & SAFETY PRECAUTIONS POWER SUPPLY: AC 160~250V, 50/60Hz Tuning system: voltage synthesized type auto-search fine tuning system PIF: 38.9MHz Soud output: 3W Power consumption: 70W Antenna input impedance: 75Ω Receiving system: a) Color system: PAL SECAM AV: NTSC3.58MHz/4.43MHz b) Broadcast TV system: B/G D/K Language displayed: English /Arabic Video input: 1.0V...
If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with a specified one. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Keep wires away from high voltage or high temperature parts. Due to the high vacuum and large surface area of the picture tube, extreme care should be taken in handling the Picture Tube.
SERVICING PRECAUTIONS Warning and Cautions 1. When you clean the TV set, please pull 4. To prevent the TV set from firing and out the power plug from AC outlet. Don't electric shock, don't clean the cabinet and the screen with make the TV set rain benzene, petrol and other chemicals.
Page 6
NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember : Safety First. General Servicing Precautions 1. Always unplug the receiver AC power cord from the AC power source before: a.
Page 7
9. Use with this receiver only the test fixtures specified in this service manual. CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components are usually called Electrostatically Sensitive (ES) Devices.
Page 8
General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range of 500 F to 600 2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.
Page 9
Replacement Carefully insert the replacement IC in the circuit board. Carefully bend each IC lead against the circuit foil pad and solder it. Clean the soldered areas with a small wire-bristle brush.(It is not necessary to reapply acrylic coating to the areas). “Small-Signal”...
CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds foil to the circuit board causing the foil to separate from or “lift-off”...
3. FUNCTIONS & LOCATION OF CONTROLS C bus control with digital technology Slide curtain power on/off display. Complete frequency range CATV (470MHz) 218 programs stored Multiple picture modes and volume modes Screen display of menu in English or Arabic Turn on/off the TV on defined time Program scan Child-lock Sleep timer...
Location of controls Front panel of the TV set Main power Power indicator MENU TV/AV Channel adjustment button Menu display button Volume adjustment button TV/Video conversion When using S terminal, please pull out video 1 input terminal Power indicator, the indicator is dim in normal stztus, the indicator lights in standby status(red), the indicator lights in sleep status(green), the indicator glints when you use remote comtroller.
Remote Controller Volume mode select Program scan SCAN Power on / standby Picture memory mode DISP TV/AV TV/ video conversion Call of screen display/ child-lock Digit direct select Call of menu One-digit / two-digit / three-digit select Channel alternate Menu item select Call of system menu Menu item adjust Mute...
4. BRIEF OPERATION INSTRUCTIONS Insert the power plug into the power line socket and insert the antenna plug into the antenna socket on the rear panel. Press down the power switch of the TV set. The red indicator light goes on. Follow the steps below. A Program preset 1.
5. DISASSEMBLY INSTRUCTIONS A. Important note This set is disconnected from the power supply through the converter transformer. An isolating transformer is necessary to service operations on the primary side of the converter transformer. Back Cabinet Removal Remove the screw residing on the back cabinet and carefully separate the back cabinet from the front cabinet.
C.EXPLODED VIEW OF CABINET PARTS Model: HS-2190 Part No. Description QTY. 0090200717 Front frame 0094000221 SPEAKER 0094000221 SPEAKER 0094000748 Color picture tube 0090200725 Bracket base board 0090200722 Rear cover...
SPECIFIC INFORMATIONS A. Principle integrated circuits A1. HS-2190 color TV set composed of the following sections (1) Microprocessor control: microprocessor N901 (TMP87CM38N V2.0)and memory N902 (AT24C08). (2) Small signal processing: super monolithic integrated circuits N201 (TB1238AN) (3) Sound processing and power a...
Page 18
2. Functions and parameters of integrated circuit TA8403K N402 Item Function Reference Reference resistance voltage (V) (KΩ) Forward Reverse Grounding terminal Output terminal ∞ Pump power output terminal 0.95 Vertical scanning saw-tooth wave signal input terminal ∞ ∞ Vertical scanning saw-tooth wave signal generating terminal Vertical power terminal Vertical power input terminal...
Page 19
N202 TN1275AZ Reference resistance Reference voltage (V) (KΩ) Function Forward Reverse With Without (black (red grounding) grounding) signal signal Y output 5.1k 4.2k Delay switch 11.6 11.6 R-Y output 5.2k 4.3k R-Y output B-Y output 5.0k 4.3k B-Y blanking control Recognition filter 5.2k 4.4k...
Page 20
N201 TB1238AN Function Reference Voltage(V) Reference Resistance(KΩ ) Forward Backward With signal Without signal Unweighted 6.7K 2.2K Audio signal output PIF circuit power supply 50.4 50.4 AFT output and auto-adjusting PIF circuit grounding IF signal input pin IF signal input pin RF AGC output 48.3 48.3...
Page 21
Function Reference Voltage(V) Reference Resistance(KΩ ) Forward Backward With signal Without signal Sandcastle pulse input 10.4 10.4 Video switching signal output Digital circuit power supply SECAM B-Y signal input 8.2k 4.7k SECAM R-Y signal input 7.6k 4.8k Y signal input 6.7k 4.8k Line AFC filtering...
Page 22
N901 TMP87CM38N Function Reference Voltage(V) Reference Resistance(KΩ) Forward Backward With signal Without signal Power supply grounding Tuning voltage output Vacant pin 5.3K 3.4K Mute 3.4K External mute 3.0K 0.9K Vacant pin 5.4K 3.4K Standby power supply 1.9K Vacant pin 1~5.1 6.7K 3.4K Band 1...
Page 23
Function Reference Voltage(V) Reference Resistance(KΩ) Forward Backward With signal Without signal Data bus control 0.5K Vacant pin Vacant pin Vacant pin Power supply 1.5K N101 LA7910 Function Reference Voltage(V) Reference Resistance(KΩ) With signal Without Forward Backward signal Output (BU) Output (BH) Control input Control input 43.4...
Page 24
signal processing circuit via C/VIDEO electronic switch. The video signals into the video signal processing circuit are amplified by 6dB gain. Then one part of the signals are sent to the scanning unit and horizontal and vertical signals are output through Pin (32) and (24) after horizontal and vertical oscillation. The other part of the signals is output via Pin (35) to Pin (39) after being followed and resistance voltage divided for 6dB attenuation by V201.
Page 25
attenuation by ATT circuit, they are output to the sound amplification circuit N701 via the input terminal Pin (6). The sound power amplification is carried out by TA8213K. Finally, the signals are output to loudspeaker SP901 and SP902. Horizontal scanning signal processing Switch on the set and 9V voltage is sent to N201.
Page 26
Power supply circuit The power supply circuit of Hs-2129 is a typical free-running pulse width switch power supply. The structure of the main circuit belongs to step-down type. It is a cold mechanism power supply. The circuit is mainly composed of switch tube V503, exciter tube V502, switch transformer T501 and rectifying filter circuit.
B.Service mode and adjusting items and datas 1. Adjustment Enter the D-MODE maintenance state with special remote controller Press the D-MODE ON/OFF button on the factory remote controller 1 to enter the maintenance state. Character D will appear on the top right corner of the screen and the following items and data to be adjusted on the top left part: RCUT After entering the adjustment state, press button↑...
Page 28
Item Data Content RCUT Red dark balance GCUT Green dark balance BCUT Blue dark balance GDVR Green bright balance BDVR Blue bright balance Press the ⊟ button on the remote controller. A horizontal bright line will appear on the screen. Then adjust the screen grid (G2) potentiometer on the horizontal output transformer in such a way that the bright line on the screen is just visible.
Page 29
When the adjustment finishes, do not forget to switch off the set with the remote controller to quit the S-MODE maintenance state. (3) Parameter record list for factory adjustment items HS-2190 Factory Adjustment (D-MODE) Items Data Reference List Item Content...
Page 30
Item Content Item Content Data Data CNTC Subcontrast intermediate value SECAM R-Y CNTN Min. subcontrast value RAGC High amplification AGC BRTX Max. subbrightness value Intermediate frequency VOC BRTN Min. subbrightness value HAFC AFC gain COLX Max. subchrominance value Volume 25% COLN Min.
Page 31
Note: the item marked “*” have been adjusted on product line ,those may differ in different TV .
C. Error Detection Process speaker Circuit block diagram Audio antenna ampligying PIF/SIFprocessing,video/au dio signal processing chroma signalprocessing RGB output and deflexion Horizontal scanning signal processing signal output Vertical scanning signal output Memory/N902 CPU N901 Remote controller Video /audio Video /audio Remote recerver input output...
Page 33
No raster and sound No raster and sound Check the Fuse normal Brocken inspectR501,C5 Inspect whether the voltage 115V 180Vloaded voltage is nornal or not 07,V503 etc. normal abnormal Inspect whether the voltage on the Inspect the voltage on all collector of V552 is 24V or not loaded resistor Normal...
Page 34
raster free Inspect whether the fuse has been broken Inspect the voltage SCREEN on CRT Board normal abnormal Inspect the voltage HEAT Inspect the voltage on the base of V432 normal abnormal Avalaibe Inspect Inspect Inspect voltage Inspect the voltage on the circuit from between the base and...
Page 35
Horizontal bright lines Horizontal bright lines Open R907 using a meter on 1k range with the red probe grounding then make the black probe touch N402(pin4) to see whether the line can suddenly spread. Available Fault in field signal circuit Fault in field signal output Inspect R907 R448 R448 Inspect the voltage onN402(3)
Page 36
Raster without picture and sound Raster without picture and sound Snow noise on the screen ? Available Inspect whether the item RAGC in Inspect the voltage on the pins of the tuner D-MODE is set to be 00 Normal Abnormal Inspect Using special...
7.ELECTRICAL ADJUSTMENT A. Safety Precautions 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to prevent the risk of electric shock and protect the instrument. 2. Never disconnect leads while the TV receiver is on. 3.
Page 38
3. Baseboard testing method: (1) Connect the main baseboard to a 21″ factory-assembled color TV set, and connect the company’s adjusting signal. (2) Switch on the 220V main power supply and press the P+, P- buttons on user’s remote controller to check grid, electronic circle, color bar, test card (without color), three primary colors, color test card signals on position number 0, 1, 2, 3, 4, 5 respectively.
INFORMATION RESISTORS CAPACITORS RESISTORS & CAPACITORS-PARTS NO.CODE Notes: 1.part numbers are indicated on most mechanical paarts. Please use this part number for parts orders. 2.The unit of resistance is (ohm).K=1000 ,M=1000K 3.The unit of capacitance is F(microfarad). P=10 Numbering system of Capacitor Example CL42 ----- 17 ---- 50V ---- 2F4 ---- 104 * ----...
10. APPENDIX speaker A.Circuit block diagram Audio antenna ampligying PIF/SIFprocessing,video/au dio signal processing chroma signalprocessing tuner RGB output and deflexion Horizontal scanning signal processing signal output Vertical scanning signal output Memory IC/N902 CPU N901 Remote controller Video /audio Video /audio Remote recerver input output...
ELECTRICAL PART LIST Material coding Location Name Specification Unit 0094000748 21"CRT A51JXS098X96 0090400476 21 inch TERRA WIRE 0094500443 HXC-54 LOOP 0090400003 21 inch TJC9-2Y loudhailer WIRE 0090400004 21 inch loudhailer WIRE 0094400752 V503 2SC4236----B-A POWER TRIODE 0094400753 V432 2SD1879----B-A TRIODE 0094400325 N402 TA8403K...
Page 45
0094100795 R245 RT13-1/6W-270-J------T CARBON FILM RESISTOR 0094100795 R297 RT13-1/6W-270-J------T CARBON FILM RESISTOR 0094100795 R271 RT13-1/6W-270-J------T CARBON FILM RESISTOR 0094100795 R272 RT13-1/6W-270-J------T CARBON FILM RESISTOR 0094100795 R273 RT13-1/6W-270-J------T CARBON FILM RESISTOR 0094100795 R316 RT13-1/6W-270-J------T CARBON FILM RESISTOR 0094100020 R604 RT13-1/6W-470-J------T CARBON FILM RESISTOR 0094100020 R614 RT13-1/6W-470-J------T...
Page 46
0094100753 R623 RT13-1/6W-1.2K-J------T CARBON FILM RESISTOR 0094100753 R633 RT13-1/6W-1.2K-J------T CARBON FILM RESISTOR 0094100025 R231 RT13-1/6W-1.5K-J------T CARBON FILM RESISTOR 0094100025 R224 RT13-1/6W-1.5K-J------T CARBON FILM RESISTOR 0094100025 R228 RT13-1/6W-1.5K-J------T CARBON FILM RESISTOR 0094100025 R274 RT13-1/6W-1.5K-J------T CARBON FILM RESISTOR 0094100025 R275 RT13-1/6W-1.5K-J------T CARBON FILM RESISTOR 0094100025 R276 RT13-1/6W-1.5K-J------T...
Page 47
0094100033 R709 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R926 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R927 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R931 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R952 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R955 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R956 RT13-1/6W-10K-J------T CARBON FILM RESISTOR 0094100033 R976 RT13-1/6W-10K-J------T...
Page 48
0094100039 R941 RT13-1/6W-68K-J------T CARBON FILM RESISTOR 0094100039 R999 RT13-1/6W-68K-J------T CARBON FILM RESISTOR 0094100712 R443 RT13-1/6W-82K-J------T CARBON FILM RESISTOR 0094100077 R314 RT13-1/6W-100K-J------T CARBON FILM RESISTOR 0094100917 R101 RT13-1/6W-220K-J------T CARBON FILM RESISTOR 0094100917 R225 RT13-1/6W-220K-J------T CARBON FILM RESISTOR 0094100944 R242 RT13-1/6W-390K-J------T CARBON FILM RESISTOR 0094100946 R515 RT14-1/4W-33-J------T...
Need help?
Do you have a question about the HS-2190 and is the answer not in the manual?
Questions and answers