4. Trouble Shooting
4-1. Apperance (Exterior) Test
Check the condition of install, joining of connectors, break or bend of PCB, cold-soldering or
Short of components and problem of part ,etc.
4-2. Power Test
5V Checking to L(910,905,906)
3.3V Checking to L(909,907,908)
30V Checking to L901
23V Checking to L902
12V Checking to L903
7V Checking to L904
4-3. System Test
Check STI5518 CPU or Flash Momory TE28F160C3T is working or not.
Check Message Display and Execution of Hyper Terminal in PC.
* Configuration of Hyper Terminal
Baud rate : 115,200 bps
Data bit : 8 bits
Parity bit : none
Stop bit : 1
Control : none
4-3-1. Check STI5518 Clock
4-3-2. Test for Flash Memory
4-4. MPEG and Audio Video Test
Check the whole process from MPEG Decoder (STI5518) and Audio/Video SWITCH (STV6412) of R, G, B, Y, C, CVBS
Also Check the Audio signal (U502(AK4351VT)
Output port (SCART, Phone Jack, RF-Modulator)
4-4-1. STI5518 (MPEG-2 Audio/Video Decoder)
4-4-2. SCART Controller STV6412
4-4-3. Audio DAC (U502(AK4351VT))
4-5. Channel Test
4-5-1. When “NO SIGNAL” Message display.
4-5-1-1. U106 (KA317 Regulator)
?
Check the Voltage 21V ~ 24V at Pin 3.
Check the Voltage 13V(Vert) or 18V(Horz) at R125.
4-5-1-2. I2C Control Signal
4-5-2. 22Khz Control through , TS-Data and Data Error control signal
4-6. Common Interface Test
Summary of Contents for SRT4155Evolution
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