Philips 70DCC600 Service Manual page 25

MEASUREMENTS ON DIGITAL BOARD PCBS
Note: All measurements carried out with digital oscilloscope and probe 10:1
RDCLCK
~
RDSYNC
~
RDMUX
~
....
~
..
,,,
I'
I
illill f'
n
I :,
r:
I
II
I~
I"
I
III Ill' "
""
Ill' '" •
iii
" I'. '"
n
j
r-"
t-
JI.-+.
-7f
~
~ tj. ~1.rH t
~
~
I.v'
"1
" IH
t~
Ch.l: 0,5 VIDIV
500 ns
Ch.2: 0,5 VlDIV
500 ns
Ch.3: 50 mV/DIV
500 ns
WCLCK
~
WDATA
~
I
I
I
i-
1,1
1l1';~L
' I V
rll
~1Jr ,:1~11I
II,
W1,IW,
,
, I'
of/ "',
2-' i
I
ill
IllJl Jl
J~l
II
1 rite evel
.10 1
u
I
Ch.l: 0,5 VIDIV
2~
Ch.2: 0,5 VlDIV
2
~s
START MARKER (IDEAL)
START MARKER
(DETECTION POSSIBLE BUT NOT RELIABLE)
AUX ENV
~
LABEL
~
I
,
~~
I
pI
•(IT
In]f(
I,M
IWI~U
I
Ch.l: 0,5 VlDIV
50ms
Ch.2: 0,5 VlDIV
50 ms
AUX ENV
~
LABEL
~
I
I
~,;~}l l~m;1
!f
,III
~W: 1' t \1IJ1I1nY
a'"
I"IfI: "1"'(1
I
I
I
Ch.l: 0,5 VIDIV
50ms
Ch.2: 0,5 VlDIV
50 ms
START MARKER
(CORRECT DETECTION IMPOSSIBLE)
AUX ENV
~
LABEL
~
I
JIll
1[1
11m,' h~l~
III
1In~',NIL l~
III !
I
I
I~I 1/\ :\
Ch.l: 0,5 VlDIV
50 ms
Ch.2: 0,5 VlDIV
50ms
TCHO
~
TCHl
~
TAUX
~
I
11111
IIII' I
I
i
III
\I I
11\
I
,I
T
ni'
l~
nn
Inl 1f
I
r n
1
-
~ ~
I
r
-
n
r
'-
~ ..J
-
,.....,
~ '-r-
Ch.1: 50 mVlDlV
50
~s
Ch.2: 50 mViDIV
50
~s
Ch,3: 50 mVlDlV
50
~s
AZCHK
~
I
I
/
I
dEliay time bjatwe
nTCHO nd CH
(.'azilT
lJth error
igilal)
-
-
Ch.l: 0,5 VIDIV
20~
41
Ch.l: 0,5 V/DIV
500 ns
Ch.2: 0,5 mVlDlV
500 ns
Ch.3: 0,5 V/DIV
500 ns
Ch.4: 0,5 V/DIV
500 ns
CS 45 933