Changhong color motor core identification method (1) The naming method between 91-97 is a four-digit method, and the area method is identified by ten digits: 1, 3 is the NC-3 movement, 4 is the M11 movement, 5 is A3 movement, 6 is TA two movement, 8 is NC-2 movement, 9 is TDA movement; in 1997, the naming method is distinguished by the letter starting with the model: (2) A is A6 movement, B is A3 movement, D is TDA movement, N is NC-5 movement, G is NC-6 movement, T is NC-7 movement, P is TA movement; (3) Double happiness R series The suffix letters (see item 2 above) are used to distinguish.
14"M11 movement" CJ37A, CJ37A1;
(NC-2 movement) C1462;
(TDA movement 1) C1492;
17"M11 movement" CK44A, C1742;
18"M11 movement" CJ47A, CJK47A1, C1842, C1843;
(NC-2 movement) C1861, C1862, C1863, C1865;
(A3 movement) C1851, C1851K;
19" M11 movement" CK49A, C1941, C1942;
(A3 movement) C1951, C1951K;
20" M11 movement" CJ51A, CK51A, CJK51A;
(NC-2 movement) CJK51B2;
21" M11 movement" CK53A, C2141, C2122, C2143;
(NC-2 movement) CJKJ53B2, C2161, C2162, C2163, C2164, C2165, C2165P, C2165T, C2165Y, C2166, C2168, C2169, C2169A, C2169C, C2188;
(A3 movement) C2151, C2151A, C2151C, C2151Z, C2153, C2151KV, C2152, C2152KV, C2155;
(TDA movement 2) C2191, C2191A, 2191C, 2191D
(A6 movement) A2116, A2117, A2118, P2119A, C2191A, R2111, R2111A, R2113A, R2115A, R2116A,
R2117A, R2118A, R2119A, R2120A, R2121A, R2122A, R2123A, R2118A;
(CN-9 movement) R2112T, R2113T, R2115T/TB, R2116BT, R2117T/BT, R2118T/BT
22"NC-2 movement" C2262, CK56B2
25"NC-3 movement" C2518;
(NC-2 movement) 2588A, C2589P;
(TDA movement 2) C2592P, C2594P;
(A6 movement) A2528, A2528B, A2528BC, R2516A, R2518A
29"NC-2 movement" C2988, C2988P;
(NC-3 movement) C2919P, C2919PS;
(TDA movement 2) C2919, C2992, C2993
(A6 movement) R2916A, R2918A, A2928;
(NC-6 movement) G2966, C2966A, C2966B, C2967, C2967A, R2916G, R2917G, R2918G, R2919G;
(CN-5 movement) N2918, R2918N;
(CN-7 movement) T2981, T2982;
(CH-10 movement) D2983, G2983, G2985, G2986, R2938D, G2938G, D2986, 2936FD, R2939D, 2939FD, 29SD83, 29SD89;
34"NC-3 movement" C3418PN
38": NC-6 movement G3898, R3818G;
M11 movement consists of AN5132, AN5250, AN5612, AN5622, AN5435.
NC-2 movement composition: TA7680, TA7698, TA5265, TDA2009.
NC-3 movement consists of TA8800, TA8783, TA8777, TA8795, TA8427, TA8739, TA8859, TA8776, TA8212.
The NC-6 movement consists of TDA9808, TA8427, TA8859, TA8256, TA1229, TA8772, and STR6709.
TDA movement consists of 1: TDA8305A (TDA4501), TDA3565, TDA3653.
TDA movement composition 2: TDA8361 (TDA8361), TDA4661, TDA3654, TDA8395, TDA6103
A3 movement consists of LA7680 (LA7681), LA7837.
A6 movement consists of: LA7688 (LA7687), LA7837, TDA7496, AN5265.
The CN-5 movement consists of AN5195 (AN5095), AN5637, TDA4665 (MN3868), TDA6103, AN5534, and TEA2261.
CN-7 movement consists of TDA9808, TB1227, TA8211, TA8859, TDA6103, TA8776, TA8427.
CN-9 movement composition: TB1213 (TA1238), TA8427, TDA2611.
CH-10 movement composition: TDA8843, TDA8350, TDA7057, TDA9859, TDA4605, TDA6107.
59. Changhong C1942 color TV: There is no power indicator at boot, the keyboard control is normal, and the remote control fails. Using the remote control of this machine to control another color TV of the same CPU model has a role, indicating that the remote control is good, observe the image, and find that there is no obvious interference line moving from bottom to top. It is suspected that the power supply filter capacitor of the motherboard is poor. Capacitor C807 (100UF/400) voltage is only 230V, it is the same as the current mains voltage, indicating that the fault is normal, replace the capacitor, the remote control returns to normal, but can not remotely shut down (can only turn off characters, sound, still Image), combined with the phenomenon of no power indicator light, find that the standby power supply voltage R823 (12K/3W) has been opened, replaced, the power indicator light is turned on after remote control shutdown, and the two faults are eliminated and repaired. 2002.1.12
58. Changhong C2591 color TV: Suddenly three in the viewing. The power supply of the power-on test is 135V, the power supply input terminal of the line output transformer T402 also has 135V voltage, and the voltage of the 1st end of the line output transformer T402 (row output tube collector) fluctuates between 98-103V. The output tube heat sink has a little temperature rise, indicating that the line has started to work. It is suspected that the output transformer is damaged. After replacing it with a new line, the fault does not change. Inadvertently found the 7-pin of the line output transformer (12V for the main channel) The resistor R412 (0.82Ω/1W) outside the voltage winding) is desoldered at one end, re-welded, and the fault is eliminated. 2002.1.10
57. Changhong N2516 color TV: It will be a bright line when it is turned on for about one minute. When the fault occurs, the main voltage B1 is 115V, and the voltage of the field pulse input terminal 2 of the field scanning block N301 (AN5534) is changed from the normal 1.1V to 0V, and the field output terminal 10 is also changed from the normal 15V to 0V. The time domain power supply VCC1 is still 9V, and VCC2 and VCC3 are still 30V. According to the 2-pin measurement, the 58-pin (field pulse output) voltage of the integrated processing block N701 (AN5095k) is also changed from 3.8V at normal to 0V. At this time, the voltage at the X-ray protection input terminal 55 is increased from the normal 0V. At 0.8V, it indicates that the horizontal bright line is caused by poor performance of a certain component. The gradual disconnection method is used to find that the channel supply overvoltage detection regulator diode D431 (W04Z15C) has a low value of 15V, and the measured value is measured by a digital transistor tester. Only 13.5V, so a 1N4148 diode is connected in series with it, and the fault is no longer present after three hours of startup. 2002.1.3
56. Changhong CJK565B color TV: a bright line. The voltage at the field pulse output terminal of the power-on scanning block IC201 (TA7698) is 0V, and the voltage at the field oscillating terminal 29 is 2.7-2.8V (normally changed with the adjustment of the field synchronous potentiometer), and the field output is down. The Q junction of Q301 (A940) has a reverse bias of 1.9V, and the C of the field output upper tube Q310 (C2073) is 110V (its BE junction voltage is a normal 0.4V positive bias), field push tube Q302 (2SC1815) The B-pole voltage is 0V, the midpoint voltage of the field output is 16V (normal value is 27V), and the replacement field vibration capacitor is invalid. After that, the bootstrap resistor R313 (820Ω/1W) is opened, replaced, trouble-shooted, and repaired. 2001.12.29
55. Changhong C3418P color TV: There are no images, sounds, and only rasters that are not synchronized. It is suspected that the scanning channel is heated and has a solder joint phenomenon. It is re-welded again, turned on, the sound image appears, and repaired. 2001.12.24
54. Changhong CJK56B color TV: The horizontal direction of the image grating is stacked in the middle, the upper and lower amplitudes are not full, and the field frequency is not adjusted to the synchronization point. The midpoint of the field output circuit is half 30V of the field power supply. The field oscillation and anti-etching voltage of the scanning integrated circuit block N201 (TA7698) are normal. The field output part bootstrap capacitor C302 (10UF/50V) is found by the replacement method. The capacity is only 7.3UF, and the replacement is repaired. 2001.11.24
53. Changhong C2991 color TV: there is no sound. When the power is turned on, the picture tube filament is lit. The cathode voltage of the three guns is up to 190V, indicating that the video is in the off state. The voltage of pins 7, 8, and 9 of the integrated circuit block N150 is 190V, and the voltage of the 5 pin is 0V. The bias resistor R1519 (220K) is open, replaced, turned on, and the voltage of the 5 pin rises to the normal 1.3V. The TV image appears and is repaired. 2001.11.1
52. Changhong C2165 color TV: When the program is automatically searched, only the H segment can not be locked, and it flashes past, and occasionally can lock up to three stations. Repeated debugging of the intermediate frequency coil T127, T131 (TF1445) failure does not change, with a pair of intermediate frequency coils debugged on the normal machine, after replacing T127, 131, the fault remains unchanged, the integrated circuit block N101 (TA7680) feet The voltage is also normal. Check the RC components of the IF section are intact. The RC117 of the AGC potentiometer is also invalid. The rogue has to find a Changhong C1462 circuit drawing and find the capacitor C126 outside the 16 and 19 feet of the TA7680 on the C1462. The capacity of C130 is 2P (2P) and 12P (2P, the value of C2165 machine in parentheses), so replace this capacitor with 15P, and change capacitor C130 (2P) to 10P again, search again, H segment Just locked all the TV shows that were played. It took about an afternoon to fix this fault. 2001.10.25
51. Changhong CK53A color TV: After watching a sudden strong fire, there is no light. When the power is turned on, the tube is obviously emitting purple light, indicating that the picture tube has been damaged, and the line on the circuit board is deflected to the ground series resistor R554 (100/1W), which is red and smoke, indicating that the line scanning part is not working properly. In order to find out which causes the damaged picture tube, the following method is adopted: the power supply is disconnected from the line tube, and the power supply for the test line is normal 110V, indicating that the power supply part is normal; the deflection coil insert C0-4 is turned off, and the high voltage of the 500 type multimeter is turned on. Test rod, the voltage at the high-voltage cap of the measuring line has been hit, more than 30,000 volts, and it is obvious that there is a strong high-voltage discharge ionizing air sound, and the normal voltage at the high-voltage cap when the deflection yoke is not connected Generally only about 15,000 volts. Re-weld all the parts of the line that are easy to solder, and eliminate the possibility of soldering. Use the frequency meter of the digital meter to measure the line frequency up to 18.6K. The voltage of each foot of IC501 (AN5435) is almost normal, replace the line oscillation part and AFC part. All the capacitors are invalid. When the resistance of the line frequency adjustment potentiometer R505 (1K) is measured, it is found to be less than 1K (since in parallel with the resistor R507 [2.7k]), and this time is 2.7k, indicating that the R505 has The open circuit is damaged, replaced, and there is no obvious discharge sound at the high-voltage cap. The voltage is only 15,000 volts, and the deflection coil is inserted, and the voltage is only 25,000 volts. At this point, the cause of the malfunction is detected. This fault is rare, the reason is a potentiometer, but the resulting damage is huge: large picture tube. 2001.10.22
50. Changhong C2163 color TV (retrofit machine): Sometimes the boot is normal, sometimes it can't be turned on. When the power is off, the main voltage B1 is only 26V. For such faults, repair by component replacement, first remove the overvoltage protection thyristor V819 (SFDR1B42), and replace electrolytic capacitors C814 (47U/50V), C817 (1U/50V), C820 (4.7U/50V). After invalid, the feedback diodes V807, V808, V809 (S5295G) are replaced by 1N4148, feedback capacitor C813 (0.47U/50V), pulse modulation transistor V811 (2SA966), V812 (2SC1959) and sampling amplifier tube V813 (2SA1015) Replaced by good components, still ineffective, when replacing the feedback capacitor C818 (2400P/100V) of the sampling part, B1 outputs 115V normal voltage, and then restores the protection circuit, and starts up multiple times, B1 outputs normal 115V voltage, at this point, Troubleshooting. After using the digital meter to measure the original capacitor capacity has not been reduced, when heated with an electric soldering iron, there is no capacity immediately. 2001.10.20
49. Changhong C2163 color TV: The film station and Shandong TV station have noise, the rest of the station is normal, and the image is normal. Trial adjustment of the sound IF coil T140 core is invalid, adjust the core of the TA7680's 7-pin 8 passband coil (the role of the sound surface filter), the sound is restored to normal, repair. 2001.10.8
48. Changhong C2165 color TV: After the repair, the automatic search can not lock the table, when the TV signal is not inserted, the screen does not have a snowboard without timing. When watching the original TV program, only the noise is not accompanied by sound. Open the case and observe that IC1 (TA7680p), image intermediate frequency coil T127, 131 (1RF1077), audio intermediate frequency coil T140 (CS5245), sound intermediate frequency filter Z102 (6.5M), Z103 (6.0) M) etc. have been replaced.
47. Changhong C2992 color TV: horizontal bright line. The voltage of each pin of the power-on field output block N301 (TDQ3654) is basically normal. Check N201 (TDA8362) for the field scan pins 41 and 42. The voltage is almost normal, but the 42-pin voltage is 0.2V lower than the normal 2.8V. Resistor R392 (3.6M) is open, replaced and repaired. 2001.9.25
46. ​​Changhong C2939KS color TV: The image sometimes becomes a negative film, and the rest is normal. Start up to check the brightness signal processing circuit, measure NQ501 (TA8783N) degree light signal input terminal 59 pin voltage is normal 3.6V, color transient processing circuit block NQT01 (TA8814N), pin 15, pin voltage, black level extension circuit NQE02 (CX20125) and other voltages are normal, so the fault range is reduced to the brightness processing board, the brightness processing board is removed, and the brightness sharpness enhanced integrated circuit block DQL10 (AN5342K) pin is soldered by the previous repairer and re-welded again. Check that the rest of the components on the board are normal (the board is mounted on the surface of the smaller component, which is inconvenient to repair) and reinstall the motherboard. The fault remains. Therefore, according to its principle, directly connect the 4.7U/50V capacitor to the 1st and 3rd ends of the video signal input and output plug-in XTL1A of the motherboard to the brightness processing board, and disconnect the 1st end of the plug-in XPL1A that is input to the brightness board. . After this treatment, the fault no longer occurs and is repaired. 2001.8.23
45. Changhong C2165F color TV (retrofit machine): one boot light board, all functions are invalid. When sent, the computer block D001 (CH01001) and the character block D003 (TC9020P-003) have been replaced. The CPU power supply 5V is only 1.2V, the main channel power supply is 12V, and the high frequency head BM terminal voltage is also 1.2V. The inductance L106 is found to be broken. After the replacement, the grating has a normal snowflake point, but all functions still fail. When the TV signal is input, an image appears and is silent. Pressing the keyboard and remote control are invalid. Appropriately, the CPU block is added with a sub-piece, so the 26-29 feet of the keyboard pulse input (output) of the near CPU are separated from the integrated circuit block by the disengagement method. At this time, the remote control works, and then the input is gradually inserted. Feet, when inserting 26 steps, the remote control is out of order, indicating that the 26 feet are not facing the right side. Follow the direction of the 26 to the keyboard. It is found that the front foot of the CPU has been welded together by the front repairer and welded. On, all functions, images are normal, repaired. 2001.8.22
44. Changhong CJ47A color TV: After 5-15 minutes, it will be synchronized. After synchronization, the center will be left 1/3 screen, and sometimes the center is right. When the power-on measurement is not synchronized, the digital frequency meter is used to measure the line frequency of about 14.5K. It is suspected that the line frequency and the center potentiometer are not good. After the new product is replaced, the fault does not change. The voltage of each foot of IC501 (AN5435) is completely normal. The line oscillation and AFC capacitor are invalid. Finally, the line power supply filter capacitor C510 (47U/25V) capacitor is changed to 31UF, and replaced with a 100UF/25V capacitor. The entire fault is removed and the original part is reloaded. The image is still normal, indicating that the original fault is caused by the ripple power supply filter capacitor. 2001.8.21
43. Changhong C2163 color TV: three no. Check the fuse F801 (2.5A) has been burned black, the resistance of the line to ground is 0, the strip tube V405 (2SD1555) collector tube is good, check the output transformer damage; test the switch on the power board V806 (2SC4745), push tube 811 (2SA966) has been broken down, resistor R805 (2.2 Ω) was burned open, and all of them were replaced and repaired. 2001.8.12
42. Changhong C2919P color TV: raster shrinkage occurs from time to time. When the fault occurs, the power supply voltage fluctuates between 90V and 115V. The auto-coupling voltage regulator is used to supply power to the TV. When the voltage is between 220V and 250V, the fault phenomenon is more obvious. Firstly, the overvoltage protection detection diode VD821 (8.2V stable) is disconnected. Pressure tube) and overvoltage amplifier tube VQ821 (2SC2500) collector, the fault is unchanged; short circuit line overcurrent detection resistor R476, the fault remains the same; replace the voltage regulator block VQ87 (S1854) is invalid, then disconnect the undervoltage amplifier tube VQ832 (2SA1015) is still invalid. It is necessary to connect 100W/220V incandescent lamps at both ends of C831 capacitor to accelerate the fault, and the fault will be obviously accelerated. Connect a 0.39Ω/2W in parallel with the limit (over) current resistance R838/839 (0.27Ω/1W). Resistance, fault no longer appears, repaired. 2001.8.11
41. Changhong B2113 color TV: no characters. Check CPU D701 (CH04001) character oscillation pins (14), (15) voltage is normal 5.0V, 25-pin pulse voltage is 4.9V, normal, and 26-pin field pulse voltage is 0.4V (normally 4.2V), Explain that the pulse circuit is faulty, and the components related to it are ineffective. If you go back and check the pulse circuit, when the capacitor C761 (1000P) is replaced, the character appears, and the capacity is basically 0. 10n ceramic capacitor replacement, repair. The special fault of this fault is that the line and field pulse voltages are normal and not correct, but the fault is normal. 2001.6.20
40. Changhong 2588A lightning strike color TV: the indicator light is on, the boot has no effect. When the main voltage is turned on, there is output when there is no secondary power-on. The value is 148V. The output line VQ44 (2SD2253) has been broken down. How to discharge the tube requires such a high voltage output. Path, found that the power supply copper bouge has been blown, connect it with wires, and temporarily do not charge the tube. First repair the power supply section, check the regulator optocoupler NQ826 (TLP621), optocoupler current limiting resistor R842 (56Ω1/8W), work / standby switching tube VQ828 (2SC2230), main regulator integrated circuit block VQ827 (S1854 Both are damaged, replaced, the main voltage output is 115V, and the secondary switch machine can be used to indicate that the power supply is repaired; then replaced with a new line tube, boot, sound image is good, repair. 2001.6.17
39. Changhong D2965 color TV: After a few minutes of work, the blue screen appears, and all function keys and remote control are invalid. According to the phenomenon, the 5V power supply of the CPU is only 4.2V, and the input terminal 1 of the power supply integrated circuit block N090 (MC33267TV) with 5V reset is only 4.3V, and the input terminal of the current limiting resistor R091 (4.7Ω) has 12V voltage, and N090, R091 severely heated, indicating that N090 thermal stability is poor, with 5 foot reset power supply integrated circuit block L78MR05 replacement, troubleshooting, repair. 2001.6.6
38. Changhong C2589 color TV: There is no image in the viewing, and there is no signal-like blue background, and another TV in the house always has a signal. The power-on search again can not receive the station. The voltage of the high-frequency head TU is only 4.2V when searching. The TU terminal is disconnected, and the TU voltage output terminal (capacitor CA17 hot spot) is measured separately. The voltage can reach 32V during the search. , indicating that the tuner has been broken, replaced, repaired. 2001.5.18
37. Changhong C2162 color TV: After a few minutes, the image is in a wire-like shape (the line frequency is seriously deviated), no image is light, and there is no light after a while. The above phenomenon is repeated after the power is turned off and on again. When the power is not normal, use the digital meter (TD9108 with frequency measurement) to measure the line frequency obviously, and gradually change the capacitance of the oscillation part C907 (3000PF/50V), C906 (5600PF/50V), C910, 911. (1UF/50V) and resistors, AFC part of the RC components, including N201 (D7698CP) and line output transformers, almost all components related to the line frequency, or no effect, until the last disengaged V402 (2CK75D) do not work, can work Hours, the diode and R405 (180Ω/0.5W) are connected in series between the main 12V to D7698CP line oscillation power supply pin 33, only for the normal operation of the D7698CP internal line oscillation auxiliary power supply, when disconnecting V402, D7698CP The voltage of pin 33 is 7.8V. When the voltage is connected to V402, the voltage of pin 33 is 8.3V, which indicates that the fault is due to the high internal voltage of D7698CP and the heat is generated. Use a 7.2V voltage regulator diode to connect to the ground at 33 feet. During the observation, the fault is not present and repaired. 2001.5.18
36. Changhong C1942 color TV: three no. Check the fuse F801 (3.15A) has been blown, the overvoltage protection thyristor Q804 (TPD315M), Q802 (2SA966), Q801 (2SD850) are damaged, replaced and repaired. 2001.5.9
35. Changhong CK51A color TV: During the viewing, the screen gradually shrinks, and then there is no light, and there is a scream. The Q551 collector of the power-on measurement output tube has no voltage, and the C814 (220UF/160V) has a voltage of 113V at both ends. It is found that the overcurrent protection resistor R816 (5.6Ω/3W) has been blown, indicating that there is a short circuit in the output part. Remove the deflection coil insert CO-4, replace the resistor R816 with a 1Ω/1W resistor, and turn on the output transformer 5 pin voltage to 113V. When the deflection coil is inserted, the voltage drop is 93V, indicating that the deflection coil winding portion is Damaged, removed and found to be markedly burnt, replaced with a new deflection coil, repaired. 2001.5.7
34. Changhong C2919P color TV: After one hour, there is no sound. According to the phenomenon, it is estimated that the voltage of the picture tube filament voltage is caused by the thermal desoldering. There is no voltage at both ends of the filament of the measuring filament. The voltage of the plug of the XP52B is 0.17V (measured by the digital meter), and the analysis is correct. Solder the plug once and weld the sight tube VQ55, VQ57, VQ59 again, troubleshoot and repair. 2001.4.29
33. Changhong P2119 color TV: There is a retrace line at the top of the screen, and the image is not effective after automatically searching for the program. The field capacitance C310 (10UF/160) has been violently replaced, and the retrace line disappears; the middle week T127 (10744) and T131 (10744) are replaced and the middle core is fine-tuned. After searching for the program automatically, the effect is good and repaired
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