Hitachi C14-RF60, Service Manual

Page: 8 / 24

C14-RF60
9
9-1
9-2
HORIZONT
AL AND
VER
TICAL DEFLECTION LOOP ADJUSTMENT
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
V
-LIN
(I
2
C B
U
S
CONTR
OL)
V
-CENTER
(I
2
C B
U
S
CONTR
OL)
V
-AMP
(I
2
C B
U
S
CONTR
OL)
H-CENTER (I
2
C B
U
S
CONTR
OL)
S-CORREC- TION (I
2
C B
U
S
CONTR
OL)
SUB- SHARPNESS
1.
Receiv
e Monoscope P
atter
n Signal.
2.
Call the "V
-LIN" mode
.
3.
Increase or decrease "V
-LIN" b
y
V
olume ke
y
till the horizontal line in the center of monoscope is just at the position where the b
lanking star
ts
.
1.
Call the "V
-CENT" mode
.
2.
Increase or decrease "V
-CENT" b
y
V
olume k
e
y
till the picture is centered.
1.
Call the "V
-AMP" mode
.
2.
Increase or decrease "V
-AMP" by
V
olume k
e
y
to set o
v
erscan of 9.5% typical.
Adjustment Spec 9.5% r
ange +1% -0%.
1.
Call the "H-CENT" mode
.
2.
Increase or decrease "H-CENT" b
y V
olume
k
e
y to center the picture hor
izontal.
1.
SET D
A
T
A
T
O
17.
* Chec
k the E-5 CH Monoscope P
atter
n then
re-adjust
V
-Slope
,
V
-Shift and
V
-Amp to
mak
esure adjustment is in acceptab
le Ring-
Shaped.
1.
SET D
A
T
A
T
O
20.
1
Focus
1.
Receiv
e the "Monoscope P
atter
n" signal.
2.
Press R/C to set Picture NORMAL condition.
3.
Adjust the f
ocus control to get the best f
ocus-
ing.
1 2 3 4 5 6
PR
O
TECT
OR OPERA
TION CHECKING
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
1
BEAM PR
O
TECT
OR
1.
Receiv
e "Monoscope P
atter
n" signal.
2.
Set CONTRAST MAX.
3.
Set BRIGHT MAX.
4.
Dur
ing the Collector & Emitter of Q883/5/7
shor
t, mak
e sure the protector ON and s
witch
to standb
y mode
.
*
Select one of Q883/5/7 to do each shor
t test.
2
H.
V
PR
O
TEC-
TO
R
1.
Receiv
e "Monoscope P
atter
n" signal.
2.
Connect output of Bias Bo
x to D603 cathode
(R610 side).
3.
Set v
o
ltage of Bias Bo
x to 18V and mak
e sure
the protector is not w
orking.
4
.
Set v
oltage of Bias Bo
x to 27V
, and mak
e sure
the protector is w
orking.
A/V INPUT AND OUTPUT CHECKING
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
1
VIDEO AND A
UDIO
OUT
-
PUT CHECK
1.
Receiv
e the "P
AL Colour Bar" signal (100%
White Colour Bar
, Sound 400 Hz 100% Mod).
2.
T
e
rminate the
Video output with a 75 ohm im-
pedance
. M
a
k
e
sure the output is as speci-
fied (1.0
Vp-p ±3 dB).
3.
T
e
rminate the A
udio output with a 10k ohm
impedance
. M
a
k
e
sure the O/P is as speci-
fied (1.76
Vp-p ±3 dB).
2
VIDEO AND A
UDIO INPUT
CHECK
1.
Using the
TV/A
V k
e
y on the remote controller
,
mak
e sure that the modes change in order of
TV
, A
V
&
TV again and the video & audio out-
put are according to the input ter
minal f
or each
mode
.If connect input to F
ront and Rear A
V
ter
minal, input ter
minal of F
ront A
V
will be se-
lected.
3
Other pr
otector
s
1
.
Once finish rectified Electrolytic Capacitor shor
t
testing in +B line
, check all possib
le damaged
components on +B line
.
(Use r
andom selected set f
or inspection)
P
AL CHR
OMA ADJUSTMENT
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
1
SUB COLOUR (I
2
C B
U
S
CONTR
OL)
1.
Receiv
e the "P
AL Colour Bar" signal.
2.
Press R/C to set Picture Nor
mal condition.
3.
Connect the oscilloscope to Red cathode(D881 Cathode).
»
Range
: 2
0
V/div
. (A
C) (Using 10:1
probe)
»
Sw
eep time
: 10 µ
sec/div
.
4.
Using the R/C call "SUB COL" in SER
VICE
mode
. Adjust SUB COLOUR b
us data, so that
the 75%
White & Red por
tions of P
AL Color
Bar be at the same le
v
el sho
wn as
Fig.
6-1
.
Bef
ore adjust SUB-COL, mak
e sure COL-
OP=8, COL-OS88, COL-03=4, COL-04=4.
5
.
After adjust SUB-COLOUR, change colour off set. COL-OP : 8 ------> 14
COL-O3 : 4 ------> 10
COL-OS : 8 ------> 14
COL-O4 : 4 ------> 10
6.
Clear the SER
VICE mode
.
Fig. 6-1
Cy
G
B
W
Y
100%W
75%
Mg
R
NTSC CHR
OMA ADJUSTMENT
NO
.
Adjustment par
t
Adjusting pr
ocedure and conditions
W
a
vef
orm and other
s
1
SUB-TINT (I
2
C B
U
S
CONTR
OL)
1.
Receiv
e the "NTSC 3.58 Colour Bar" signal
thr
u A
V
in.
2.
Connect the oscilloscope to
TP47B (P882 pin
5) BLUE-OUT
.
»
Range
: 100mV/div
. (A
C)(Use Probe
10:1)
»
Sw
eep time
: 10 µ
sec/div
.
3.
Call the "SUB-TINT" mode in ser
vice mode
.
Adjust the "SUB-TINT" b
us data to obtain the
w
a
v
e
fo
rm
sho
wn as
Fig.
7-1
.
4.
Clear the SER
VICE mode
.
Fig. 7-1
W
Y
Cy
G
M
g
R
B
SAME LEVEL