50
V50 109B5
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Repair Flow Chart (Continued)
F. TDA4841
Check List
Basic check
Vcc > 9V
during startup
8. HDRV
14,15
Vsync,Hsync
12,13 Vout1/Vout2
inhibit pin6 output
if pin3 is pulled to
ground by 7505
floating ----->7671
floating ----->7672
floating ----->5681 pin2
floating ----->5681 pin4
a pin3 amplify pin5 and it compare to pin4
b. pin4 generate the saw_tooth wave
c. pin5 input voltage for the square output waveform
d. pin6 pwm output to 7617 & 7618 base
if active
pin16
CLBL=hi
if no exist
3.4.5.6 B+ control
2. Xray(Ground)
(Active LOT pin 12,
13 to 7411 pin1
1. HFLB
(from H.defl)
to H_deflection.
7606 base
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.pin10 = Vcc < 9V
16. CLBL
differential input
to 7401 pin 1, 7
the input sync from
cpu pin 33, 34
F
Содержание V50 109B5
Страница 7: ...9 Go to cover page 7 V500 109B5 Wiring Diagram ...
Страница 25: ...C B A Of Video Board 25 9 Go to cover page V50 109B5 ...
Страница 29: ...C B A Of Main Board 29 9 Go to cover page V50 109B5 ...
Страница 30: ...30 V50 109B5 9 Go to cover page C B A Of Main Board ...
Страница 34: ...34 V50 109B5 Control Panel board C B A 9 Go to cover page ...
Страница 36: ...36 V50 109B5 MHR board C B A 9 Go to cover page ...