Hitachi C14-RF60, Service Manual

Page: 7 / 24

C14-RF60
8
8-1
8-2
Line 3 is one step (data) br
ighter than line 2
# 12300
°K
X : 0.272 Y : 0.275
(MINOL
T
A
COLOUR ANAL
YZER CA-
100) *Note:
Abo
v
e
Data can be UP/DO
WN
b
y
V
olume
k
e
y.
LO
W
H
IGH
10cd/m2
200cd/m2
t
3.3Vdc 0
* Alter
nativ
e Procedure:
(1) Step (1), (2), (3) and (4) are same
as beside procedure
.
(2)
Then contin
ue adjust until retr
ace
line appear and mak
e sure the col-
our appear whether red, g
reen or
b
lue
.
(3) Connect the oscilloscope to related
test points as belo
w which is based
on colour appear at (2) RED = TP47R, GREEN =
TP47G, BLUE =
TP47B.
(4)
Then adjust Screen
VR until the tip
of signal reach 3.3Vdc.
* 12300°K
DRI-GW="DRI-GS"-7 DRI-BW="DRI-BS"-7 DRI-GC="DRI-GS"-7 DRI-RC=25
CR
T CUT
-OFF
, B
A
CKGR
OUND AND SUB-CONTRAST ADJUSTMENT
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
CONVERGENCE ADJUSTMENT
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
1
CONVER- GENCE ADJ
.
(T
o be done
after the purity adjustment.)
1.
Receiv
e the "Crosshatch P
atter
n" signal.
2
.
Using the remote controller
, call NORMAL
mode
.
ST
A
TIC CONVERGENCE
1.
T
u
rn
the 4-pole magnet to a proper opening
angle in order to super
pose the b
lue and red
colours
.
2.
T
u
rn
the 6-pole magnet to a proper opening
angle in order to super
pose the g
reen colour
o
v
er the b
lue and red colours
.
DYNAMIC CONVERGENCE 1.
Adjust the con
v
ergence on the fr
inges of the
screen in the f
ollo
wing steps
.
a)
Fig.
5-1
: Dr
iv
e the w
edge at point "a" and
s
wing the deflection coil upw
ard.
b)
Fig.
5-2
: Dr
iv
e the wedge at points "b" and "c"
and s
wing the deflection coil do
wnw
ard.
c)
Fig.
5-3
: Dr
iv
e the "c" w
edge deeper and
s
wing the deflection coil r
ightw
ard.
d)
Fig.
5-4
: Dr
iv
e the "b" wedge deeper and
s
wing the deflection coil leftw
ard.
2
.
Fix all the w
edges on the CR
T and apply glass
tape o
v
er them.
3
.
Apply lacquer to the deflection y
ok
e loc
k
scre
w
, magnet unit (pur
ity
, 4-pole
, 6-pole
magnets) and magnet unit loc
k scre
w
.
Finally receiv
ed the Red-only and Blue-only
signals to mak
e sure there is no other colours
on the screen.
Fig. 5-2 Fig. 5-1 Fig. 5-3 Fig. 5-4
RGB BGR
R G B
R G B
B G R
B G R
RGB BGR
Lacquer
Wedge "a"
Wedge "b"
Wedge "c"
About 100
°
About 100
°
4-pole magnet
6-pole magnet
CRT neck
Lacquer
Purity magnet
Note***
1.
Call " SUB-BRI" in ser
vice mode.
(Receiv
e Cross-
hatch patter
n with 5 b
lac
k le
v
el windo
ws)
2.
Adjust the " SUB BRIGHT " b
us data in order that
the line 1and 2 ha
v
e
the same darkness wherelse
line 3 is one step (data) br
ighter than line 2.
Fi-
nally data min
us 1 to mak
e line 1, 2, and 3 are in
same le
v
el (dar
kness).
3.
Clear the SER
VICE mode
.
Remar
k
1
.
Bef
ore CR
T cutoff adjustment, SUB-BRIGHT
,
DRI-RS/R
W/RC
, DRI-GS/GW/GC
, DRI-BS/BW/
BC
,
CUT
-R and CUT
-G m
ust be INITIAL D
ATA
.
2.
CR
T Cutoff adjustment m
ust be done inside a dar
k
room.
1.
Switch
TV to
VIDEO mode,BLUE BA
CK OFF
, with
NO VIDEO
signal.
2.
Press R/C to set Picture Nor
mal condition.
3.
First, off the screen b
y adjust screen v
ar
iab
le resis-
tor
.
*4.
Ne
xt, chec
king AKB circuit function b
y slo
wly in-
crease screen v
ar
iable resistor until colour r
aster
suddenly on and off (AKB star
t function).
5.
Then contin
ue adjust until retr
ace line appear
.
6.
Finally
, slo
wly decrease the screen v
ar
iab
le resis-
tor until screen retr
ace line cut off
. (Not Raster)
Note :
Must confir
m the AKB function in set bef
ore con-
tin
ue the ne
xt adjustment.
2
SUB- BRIGHTNESS ADJUSMENT (I
2
C B
U
S
CONTR
OL)
3
WHITE B
ALANCE
SER
VICE
MODE ADJ (I
2
C B
U
S
CONTR
OL)
1
.
Receiv
e the "WHITE" patter
n with B
URST signal.
2.
Press R/C to set Picture NORMAL condition.
3
.
Connect the DC miliammeter betw
een TP602
(-
) TP603
(+).
4.
Chec
k Beam current should be around 800 µ
A
.
5.
Set it to ser
vice mode and adjust the DRI-GS
, &
DRI-BS data to ha
v
e
a colour temper
ature of
12300°K ( white ). * Note .
6.
Receiv
e "WHITE" patter
n,
WITH B
URST signal,
and set BRIGHTNESS
Y b
y
generator
, to **10 cd/
m2 (MINOL
T
A
CA-100) b
y
reducing LUMINANCE
Y signal.
7.
Adjust "CUT
-R" & "CUT
-G" to get desired colour
temper
ature #.
Then go bac
k NORMAL mode
(HIGH BRIGHT) to chec
k colour temper
ature
. If
out of r
ange
, bac
k to (1).
Note:This adjustment m
ust be done after warm-
ing up the unit f
or 30 min
utes or long
er with
a beam current o
ver 500µA.
* ADJUST DRI-GC/GW
, DRI-BC/BW as f
ollo
wing
D
A
T
A, after finishing DRI-BS and DRI-GS D
ATA
ADJUSTMENT
.
DRI-R
W = 32 (FIXED), DRI-RS = 32 (FIXED)
DRI-BC = "DRI-BS"
1 2 3 4 5
1 2 3 4 5
1 2
4
Maxim
um
beam c
hec
k
1.
Receiv
e the "Monoscope P
atter
n" signal.
2.
Press R/C to set Picture NORMAL condition.
3.
Connect the DC miliammeter betw
een TP603
(+)
& TP602
(–).
(Full Scale: 3 mA Range)
4.
Beam current m
ust be within 800 ± 100 µ
A
.
1
CR
T CUT
OFF
ADJUSTMENT (I
2
C B
U
S
CONTR
OL)
Note*** SAMSUNG CR
T
: 32mm
CPT CR
T
:
35mm
T
OSHIBA CR
T
:
35mm