45
104S CM23 GSIII
Repair Flow Chart
F. TDA4857
Check List
Basic check
Vcc > 9V
during startup
11.EWDRV
8. HDRV
14,15
Vsync,Hsync
12,13 Vout1/Vout2
inhibit pin6 output
if pin3 is pulled to
ground by 7507
pin17 = Hunlock = floating
pin30 = Hpll2 = 0V
Pin8 = HDRV = floating
pin6 = B+DRV = flaoating
pin12 = Vout1 = floating
pin13 = Vout2 = floating
pin16 = CLBL= Hi
a pin3 amplify pin5 and it compare to pin4
b. pin4 generate the saw_tooth waveform
c. pin5 input voltage for the square output waveform
d. pin6 pwm output to 7603 & 7604 base
if active
pin16
CLBL=hi
if no exist
3.4.5.6 B+ control
2. Xray
(from LOT)
1. HFLB
(from H.defl)
to H_deflection.
7605 Gate
Vcc=pin9=pin10=12V
gnd =pin7=pin25=0v
Vertical blank will be activated = hi
1.pin30 = softstart pll2 = 0V
2.pin26 = pll1 is unlock in searching mode
3.pin1 = HFLB no exist
4.pin2 = Xray once actived
5.pin10 = Vcc < 9V
16. CLBL
to H_deflection
east/west control
7505 emitter
V_differential input
to 7401 pin 2, 3
the input sync from
cpu pin 20,21
Содержание 104S11/00
Страница 67: ...23 1 104S CM23 GSIII VIDEO BOARD PCB Go to cover page Forward Back CLICK HERE FOR COMPONENT LAYER ...
Страница 72: ...PWB MAIN BOARD 27 1 104S CM23 GSIII Go to cover page Forward Back CLICK HERE FOR COMPONENT LAYER ...
Страница 73: ...PWB MAIN BOARD 27 104S CM23 GSIII Go to cover page Forward Back CLICK HERE FOR COPPER PATH LAYER ...