Size, H. Center Coarse Adjustment; Vertical Amplitude Coarse Adjustment; Discharge Of 200V Line; Common Service Adjustment A - Hitachi 35UX85B/CZ68 Service Manual

Table of Contents

Advertisement

AGLXU
Adjustment
Procedure
(1)
Vary
R7HF
so that the right and left vertical
lines are
straight.
(3)
CPT P.W.B.
2.6
H. size,
H. Center
Coarse
Adjustment
Adjustment
Preparation
(1)
Receive
a circle
pattern
signal
or cross-hatch
signal.
(Cross-hatch
signal:
20 vertical
lines,
14 horizontal
lines.)
(2)
Set the AC input
power
supply
to 120+ 1V.
(3)
Set CONTRAST
to maximum
and BRIGHTNESS
to
center.
Adjustment
Procedure
(1)
Vary R7H6
so that the horizontal
size markers
of the
circle
pattern
at the right and left end are 1.5-I
.5 on
the average.
(2)
If using
the cross-hatch
signal,
vary
R7H6
so that the
far left and right vertical
lines are at the screen
edges.
(3)
Vary
R759 so that the difference
of the horizontal
size
markers
of the circle
pattern
at the right and left end
are within
1.5.
(4)
If using
the cross-hatch
signal,
vary
R759
so that the
difference
of the far left and right vertical
lines at the
screen
edges
are within
0.5 of a cross-hatch.
2.7
Vertical
Amplitude
Coarse
Adjustment
(R631)
Adjustment
Preparation
(1)
Receive
a circle
pattern
signal
or cross-hatch
signal.
(Cross-hatch
signal:
20 vertical
lines,
14 horizontal
lines.)
(2)
Set the AC input power
supply
to 120f
IV.
(3)
For picture
controls,
set the BRIGHTNESS
to maximum
and set the other
controls
to their standard
conditions.
Adjustment
Procedure
(1)
Turn the vertical
amplitude
adjustment
VR (R631)
and
adjust
as shown
below.
(2)
If using
the cross-hatch
signal,
vary
R631 so that the
top and bottom
of the screen
edge
is 7 cross-hatch
away
from the exact
center
of the cross-hatch
signal.
Adjustment
position
(inner
edge
of the outer
circle)
2.8
Discharge
of 200V
Line
Adjustment
Preparation
(1)
After the adjustment
of assembled
P.W.B.
and after the
checking
of mounting,
the jig below
is connected.
(2)
Deflection
P.W.B.
EY2 connector
PY2
+2oov
1
GND
Adjustment
Procedure
(1)
After the adjustment
and checking
of the mounting,
the
power
is turned
off then close
the Sl, S2 switch
(for
3-5
seconds)
and discharge
200V
line.
It.
COMMON
SERVICE
ADJUSTMENT
1.
DEFLECTION
CIRCUIT
ADJUSTMENT
1.1
Alteration
Contents
for
CPT
(1)
Keep
DY sticked
to CPT funnel.
(2)
Receive
white
raster
signal
and adjust
the white
balance
according
to Item II, 2.1.
(3)
Set BRIGHTNESS
control
and CONTRAST
to maximum
and apply
heat-run
to the TV set with circle
pattern
or
white
raster
signal
received
for "T" minutes
or more.
(See Table
l-1 .)
Table
l-l
MODEL
1
CPT (MAKER)
1 MINUTES(T)
1
NOTE
1
I
I
I
35UX85B
A89AGFll
Xi 0
40
min.
17% Cf'T
(CZSS)
1.2
Purity
Check
The magnetic
field in artificial
magnetic
field should
follow
the magnetic
field according
to the destination,
and the set
should
face
as follows.
After degaussing
in each
direction,
check
these
items
visually
and with a microscope.
(A)
No problem
in white
uneveness.
(B)
Each
single
color
must
not hit any other
colors.
(C)
If white
or each
single
color
is defective,
apply
a
magnet(S)
on CPT for correction.
If any magnet
is
applied,
check
it after degaussing.
MODEL
(
CPT (MAKER)
(
CHECK
FACE
35UX85B
(CZ68)
A89AGFllXlO
North
South
A: 1OKR

Advertisement

Table of Contents
loading

Table of Contents