Repair flow chart (continued) – Philips V30 User Manual

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Repair Flow Chart (Continued)

107T5

F. TDA9112A

Check List

24.EWDRV

26. HDRV

1,2
Vsync,Hsync

23,13 Vref/Vout

pin3 = Vblk = floating
Pin5 = Hpll2 = 0V
pin6 = HDRV = floating
pin8 = BDRV = flaoating
pin12 = Vout1 = floating
pin13 = Vout2 = floating
pin16 = CLBL= Hi

if active

Check 6806

Check pin 12
pulse

25. Xray

(from LOT)

12. HFLB

(from H.defl)

to H_deflection.

7601 base

Vcc=pin29
gnd =pin7=pin27=0v

to H_deflection

east/west control

7602 base

differential input

to 7401 pin 1, 7

the input sync from
cpu pin 33,34