User manual STRONG SRT 4355 SERVICE MANUAL

[. . . ] RF-Modulator RF-Connector Frequency Output Channel TV Standard Audio Output Preset Channel 75w IEC169-2, Male/Female 470MHz to 860MHz CH 21-69 for the Demodulator PAL B/G/I/D/K Selectable by Menu Setting Mono with Volume Control CH 40 (or TBD). Power Supply Input Voltage Type Power Consumption Stand-by Power Protection AC90 to 260V, 50Hz/60Hz PWM Regulator Max. [. . . ] Also , Checking soldering or Chip is consider flash-rom and CPU Where are replace of component Part, and Check the insertion of part (5) Confirm that Message is displayed when interlink STB and PC by RS232 CABLE and did Power off/on with next time Execute H yper te rminal in PC and do together Setup Baud Rate: 115, 200bps. Data bit:8 bit Parity bit :none Stop bit :1 Control: none 1) When Message is not displayed 1. : Do AC Power put on in state that click Menu and Select key simultaneously after AC power put off, ( method by boot mode Boo ting) Still, if any message is not displayed, it changes U2(39VF800A flash ROM) . if "starting boot " message is displayed , Do Download again by suitable Firmware to model . If screen is displayed, it does FACTORY RESET necessarily. 2) When Message is displayed : (Message can be different according to Firmware Version) Set ACLK <32000> PHILIPS TDA8044 connected IT520S SET -TOP BOX MONITOR v1. 10 BY INTEGRA TELECOM Nov 02 2000, 23:35:35, http: www. integra. co. kr >size of sysconfig=140 flash pattern(ffff) flash pattern(ffff) flash pattern(ffff) PHILIPS TDA8044 connected Enable AV Interrupts launch OSD launch OSD 3 Set ACLK <3> launch OSD 4 launch OSD 4. 5 launch OSD 5 intr EN end[D:0][AV:3c00] RegValue23=3 AVO:OSD Initialized AV decoder and OSD initialized 1. When I2C ERROR , EEPROM ERROR, TUNER CONNECT FAIL message happens resistance between U1's it is measured After AC POWER OFF, measuring pin 156 and GND, pin 155 and GND , if must change. (20ohm ~ 0 ohm ), L64108 ( CPU ) 2. When "EEPROM ERROR" Message happens U4 : EEPROM(24C64) change 3. When "Tuner connect Fail " Message happens If POWER supplied to Tuner is normalcy , Tuner must change. 4. When " FLUSH DRAM " Message happens U7(L64005) and U 8(KM416S1020) Re - sold ering do, and change U 7(L64005) if is happened again. 5. Normal Message as being displayed, change MICOM if TV screen does not come 5. 2. 2. When "NO SIGNAL" message appears (1) U19:(KA317(Regulator)) - > pin 3 : 21V~24V U19:(KA317(Regulator))-> pin 2 : 13V /18V If confirm that voltage is measured and is not measured Action) : When U 19 's( KA317) input voltage is low, , U19 change do you change SMPS, do U 19 Voltage Line check in SMPS if change SMPS and is low. (2) Measure by Voltage Meter(Oscilloscope) whethe r VERTICAL(13Volt) or HORIZONTAL(18Volt), 22KHz(ON/OFF) is displayed normally measuring voltage of F100's Lead(or Tuner LNB OUT PORT) when do SCAN satellite in INSTALL MENU. (LNB supply voltage check) (3) When LNB voltage(13V/18V) is not displayed, 13V/18V is displayed measuring Q it changes Q 27 (TR:kta1273) if 27 's(TR:kta1273) Emitter monad by Voltage Meter and measure whether 13V/18V is displayed in F100(Poly Switch) Action) : If mania is happened to F100 or Q 27 after shift Tuner shift (4) Volta ge measurement supplied 1. L13(Coil) : about 5V, to TUNER L14(Coil): about 28V , U12(Regulator)-Pin 3 : about 5V (E54(+)Elect Cap ) : 3. 3V Action) : If voltage is normalcy TUNER change . 2. U12(Regulator)-Pin3 : 3V~ 0V Action) : If it is 100 ohm lows, d oing AC POWER OFF and measure , U12 's(Regulator) 3Pin and resistance between GND Tuner change (5) Check I2C Control Signal Action) : if Voltage is drop SCL as well as SDA. therefore each of part check have to SCL with SDA of Voltage 3. 2 ~3. 5V. Check the install chip-position and short of solder, cold solder, etc. Where are replace of component Part, Check the insertion of part SCL -- SDA -- (6) Changing SMPS test (7) Try scan a gain after Factory reset Action) : Do U2(39VF800A Flash ROM) and U1(L64108 CPU) Re - solder if "Wait to Reset setting" Message comes continually when did Factory Reset. "CI CARD INITIALIZING NOW. . . . " Message becomes Display continually on screen and when Menu transfer is slow Firmware again Download do . 5. 2. 4. [. . . ] If you already have the newest version noting will happen, and you can leave the menu. When you need the newest version software, the receiver will automatically download that version from the satellite signal. [. . . ]