Hi Sense HSM515AF free download

File name HSM515 SM.pdf

SERVICE MANUAL HSM515AV 51CM CTV SEP04 SERVHSM515AV Hisense UOC 2004-10-15 21 Ё & 14 Ё Color TV Service Manual Catalogue 1. Technology Specification and Feature... 2. The IC list ... Page 1 Page 2 3. Signal process... Page 2 4. The horizontal and vertical circuit... Page3 5. Power supply... Page 3 6. Appendix 1...Page 4 7. Appendix 2...Page 9 1 Technology Specification and Feature I2C Bus Control Auto Search Off/On Timer Rated Voltage: Sound output: Screen size System: AC 140V-250V 5 WЧ2 Picture tube Color RF AV PAL NTSC 50Hz/60Hz 54 cm Sound B.G Channel coverage: VHF Low channel (VL) =48.25 to 147.25 MHz VHF high channel (VH) =154.25 to 463.25 MHz UHF channel U) =471.25 to 863.25 MHz IF External input/output 38.9MHz Video/Audio(L/R)2 set input S-Video input YUV input Video/Audio(L/R) 1 set output 1 2. IC list Table 1, the main IC and functions Number 1 2 3 4 5 Power supply CPU + SIGNAL PROCESSER Field driver Sound driver AV SWITCH Function IC KA5Q0765RT Remark N611 OM8370/TDA9370 N301 STV9302A AN7522N TC4052BP N401 N161 N801 (Video) N121(sound) 6 7 8 9 10 Memory Photo-coupler IR-receiver 8V Regulator 5V Regulator AT24C08 HS817B HS0038A L7808CV L7805CV N702 N504 N1503 N503 N505 3. Signal process The TV signal enters into tuner (A201) from cable or antenna. Pin 10 and pin 11 of N301 are combined to select the band. Pin 4 of N301 outputs PWM tuning signal. The 38.9MHz IF signal is coupled to V308 (pre-amplify) and then to SAWF (Z301). After processed in the SAWF, the 38.9MHz signal gets to pin 23 and pin 24 of OM8370. The IF circuit in OM8370 includes such unit as the AGC amplifying circuit, 38.9MHz oscillator, PLL video demodulator, video amplifier, IF identify circuit and AFT circuit. The demodulated signal (CVBS) comes from the pin 38 of OM8370, the sound signal comes from the pin 44. The internal CVBS signal needs norm identification then outputs from pin 38 of OM8370, via the trap circuit (composed of the V351, Z351, Z354,V352 and so on) feeds back to the pin 40 of OM8370. The RGB signal comes from pin51, Pin52, Pin53 of OM8370, and outputs to the CRT board. The internal sound signal comes from pin 44 of OM8370 and then input to pin 1 and pin 12 of HEF4052BP. The sound signals from RF and AV are selected in it. The selected signal is output from Pin 3 and pin13, then input AN7522N(sound emplifier) or output from AV terminals. 2 4. Horizontal and vertical circuit: Through Synchronous separating circuit, the video signal is divided into horizontalSynchronizing signal and Vertical-Synchronizing signal. The horizontal-Sync pulse coming from pin 33 is t