Philips 107T50/00 Service Manual page 45

Repair Flow Chart (Continued) Repair Flow Chart (Continued)
4 Go to cover page K4¢ Go to cover page
' ope rough check for R,G, B
|B. Video 1. video input= 0.7V C. Horizontal deflection
| Repair Fiow 2. 7331 video output =2.5V check blanking blanking output repair flow :
i 3. 7701 video output > 35Vpp 7501 ping es
Sok yt let 2 ss a ee
1. Sympton : 1. 8) ton :
(with white pattern) check heater check check No cra eins iat check Hsync check Hsync check Hsync
| no picture *) = +6.3V EHT=25KV VGi <-150V pe net ys H-detlection. [ 7605 base 7601 base 7501 pin26
Laren ED .on 30<2724<80
Ok
check Xray prot
7501 pin25
check DC restoration
7722,7732,7752
7721,7731,7751
check
VG2 > 450V
check check Hsync check Hsync
replace 5156 190V 0 | 7615 drain ahs 7 7501 pin28
Rv
check refer 7501 check list
6611,7613,7614 or replace 7501
check blanking
7501 pin3
= Ok
4
2.Sympton :
.
2.8 :
: : . Sympton : check 2614 check check 7501
no video (or dim), check Vg1 L.No»| turn down Vg2 + — check cathod East /West parabola 7602 ~ 7604 Pin24 ase
only raster with/without retrace line
Vg1 = -30V +83V,
corr.
exist parabola exist parabola exist
green LED on
chack 7331 check 7701 check 7701
pe belies pin 7,6,5 pint,2,4 } pin 9,10,11 3. Sympton : enter factory mode
input swing input 2 output swing H-linearity check linearity data
(full freq. range) in eeprom
Ok
check 7331 Cras a eae 7701
Pin24 HFLB ght check cpu
Lestedteeins Sts 7801 replace 5608
Ok
pin 30
replace 7331 }
H.V.check 7331
check 7402 check
3422
oe ae eiaca es
4. Sympton : check
controt range
i3. Sympton :
no OSD or
OSD out of sync.
enter OSD
function
disable motier|
check check
761 6collector 7501 pin 32
6. Sympton :
Focus