Power supply
wwwc.DhaetcakShineeptu4tUv.coolmtage ―→ check voltage of C910 anode ―→ check Pin 3 of N901 ―→ check V901 ―→
check output voltage of T901 secondary coil ―→check voltage of N904,N905 Pin 3(5.0v) and N903 Pin3
(9.0V) ―→check voltage of N103 Pin 8,31,32,35,36,43,55(5v) and Pin11,19(8v)―→ check voltage of N602
Pin 8 (+5V)
Audio circuit
check power supply of audio power amplify circuit ―→ check input audio signal of audio power amplify
circuit ―→ check waveform of N103 Pin 5―→ check waveform of xs808 Pin 16,17―→ check waveform of
N201 Pin 8,10
Horizontal circuit
Check voltage of T402 Pin 3 (110V) ―→ check voltage of N103 Pin 19 (+9.0V) ―→ check waveform of
V401 Base ―→ check waveform of V402 Collector ―→ check output voltage of T402 coil ―→ check
waveform of T402 Pin 8
Vertical circuit:
check voltage of N440 Pin 2 (+25V) and Pin7(+9V)―→ check voltage of N103 pin 19 (+9V) ―→ check
waveform of N103 Pin 17 ―→ check waveform of N440 Pin 1 ―→ check waveform of N440 Pin 5
MCU circuit:
check voltage of N103 Pin 31,32(5v) ―→ check waveform of N103 Pin 33
5
PIN 39 KEY
wPwIwN.D4at0aSheeRt4EUS.cEomT
PIN 41 PLL
PIN 42 CPU GND
PIN 43 CDD VCC
PIN 44 FBP INPUT
PIN 45 C INPUT FOR Y/C MODE
PIN 46 Y INPUT FOR Y/C MODE
PIN 47 DDS FILTER
PIN 48 Y INPUT FOR YcbCr MODE
PIN 49 Cb INPUT forYcbCr MODE
PIN 50 4.43MHz CRYSTAL
PIN 51 Cr INPUT FOR YcbCr MODE
PIN 52 SELECTED VIDEO OUTPUT OR FSC OUTPUT
PIN 53 CHROMA APC FILTER
PIN 54 EXT VIDEO INPUT
PIN 55 VIDEO CHROMA DEFLECTION VCC
PIN 56 INT VIDEO INPIT
PIN 57 BLACK STRETCH FILTER
PIN 58 PIF APC FILTER
PIN 59 AFT OUTPUT
PIN 60 VIDEO OUTPUT
PIN 61 RF AGC OUTPUT
PIN 62 IF GROUND
PIN 63
PIF AMP INPUT
PIN 64
KEY control
5V DC
11