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| 4. Rotation
|
check
"
output from OV to 5V
F. TDA9112A
Vec=pin29
Check List
gnd =pin7=pin27=0v
check
Aare
output from OV to 5V
42. HFLB
Check pin 12
(from H.def)
pulse
a
ee
»{check key Power, Ok, LF,
check 3891~3894
Sou eyped
Brightness and contrast keys
pin3 = Vbik = floating
Pin5 = Hpll2 = 0V
check pin24
25. Xray
;
;
pin6 = HDRV= floating
1.no HV sync & IF cable pin5 floating
- show msg.
(trom LOT)
if active
pa ae
2.H/V sync exist & IF cable pinS to ground
— - normal
ae i = Wee = dean
3.H/V sync non-exist & IF cable pinS to gnd = -power saving
so 6 a CLBL= Hi
:
24, Selftest
-—----—-»
4 After 189281893 pressed on, then power on
pues
-
(1895) with IFeable pin5 =L
-factory mode
5.After 1892&1893 pressed on, then power on
(1895) without IFcable pin5=H
-burn in mode
eo
to H_deflection.
7601 base
check idle status
25,26. DDC bus |
sda=pin25=hi
scl=pin26=hi
to H_defiection
east/west control
7602 base
24.EWDRV
check
7802
M24C16
7501
TDA9112A
7331
NT6812K°
check idle status
31,32. 1C bus
= }-—-———»_
sda=pin32=hi
scl=pin31=hi
differential input
23,13 Vret/Vout
to 7401 pin 1,7
~
check
7802 pin 7
EEPROM
[UT
Low
: write enable
Hi
: write disable
1,2
the input sync from
Vsync,Hsyne
cpu pin 33,34
check
80. Fllinganty
output from OV to 5V
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