SAMSUNG CW29Z306VBXXEC - TROUBLESHOOTING BY BLOCKS

SYSTEM BOARDS TROUBLESHOOT

Tuner Diagnosis

If no signal is received even though the RF signal from the external aerial is connected to the MAIN Board Tuner, check the following items.

1. Supply Power: 5V, 9V, 33V
2. Check for an RF defect: Check the CVBS output
3. Check for an AUDIO defect: Check the SiF Signal output.

External Input Diagnosis

It receives the EXT1/EXT2/signal and consists of monitor output (video and audio).  The signal is input to VSP9402 through the port. If no signal input/output is detected, check the following items.

• Power supply : VSP9402 (3.3V,1.8V) , CXA2180(5V)
• Check if the input and output jacks are defective.

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DNIe (SPD41) Diagnosis

The signal is received from the Audio Processor (MSP3421G) and sound is output at 10W + 10W power.

Power supply :15V

• Check for input defects : L/R
• Check for output defects : L+, L-, R+, R-

STV8237(Audio Processor) Diagnosis.  It processes the SIF and SCL 1/2 signal output from the Tuner.

Power supply : 3.3V,1.8V,9V , 5V

Check for input defects : SIF, SCL1/2-IN,SCL1/2-OUT

Check for output defects : SOUND L/R.

VSP9402 Diagnosis

It receives RF, AV1/2/3 and S-VHS (Y,C) signals and outputs to Y/Pb/Pr of CXA2180Q, M-OUT and V-OUT through internal switching.

• Power supply :1.8V, 3.3V
• Check for input defects : RF, SCL1/2,S-VHS(Y,C)
• Check for output defects :M-OUT,Y,Pb,Pr,HS1,VS1.

CXA2180 Diagnosis

The Y/Pb/Pr signal is received from VSP9405B and CXA2151Q and the signal is output as R/G/B. It also outputs the V/H Drive, E/W and performs the ABL and EHT operation.  If V-Drive output is not detected, check for an IC defect..

• Power supply : 5V, 9V
• Check for input defects : Y/Pb/Pr, H/V
• Check for output defects : R/G/B, ABL, EW, V/H-DRIVE.