STRONG SRT4355
Instrukcja Serwisowa

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