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Measuring
z
jo,
Item
instiurment
Test point and Adjustment part
Description
j
i
i
It
aring on the
]
1.) TARGET. | Oscilloscope
R313 (TARGET)
Ae Sate es display voltage appearing
ICKU
.
vee,
(ana)
a
LEER eC HVBORRE!
(Confirmation is facilitated by demounting
SETTING
:
BOARD]
a switching regulator.)
PRESETTING
2. Observe Point @) shown in Fig. 2-1 (a) and
A | To obtain
if a picture is not obtained, preset the follow-
measure cathode voltage ee pK
ee
a picture
ing VRs as indicated.
(Waveforms
shown
in
Fig.
observable.)
e@ PRE PROCESS BOARD
ke—
1H —+|
R12 (Y GAIN)
>
Mechanical center.
|
@ AGC BOARD
if
R26 (Y KNEE)
~ Turn fully counter-
i
clockwise.
R43 (CHROMA LIMITER)
VK
:
>
Turn fully counterclockwise.
ae
CHROMA
L e F
Vv
Fig. 2-1 (b)
LIMITER
A
a
yGain|
* ENCODER BOARD
:
{about 7V)
7
RO4 (Y SET UP) + Mechanical center.
;
3, Measure (B14) and adjust R313 (TARGET)
Y SETUP
Y KNEE
Wily
so that voltage
becomes
"pickup tube
\f a picture is already obtained or fine adjust-
display voltage + cathode voltage (Vk)."
ment
is to be made
later, presetting is not
7
z i
|
necessary.
- | 2.] Rough
Oscilloscope
R215 (LIGHT
© Close the tris
[Eee
rare eae
q
LEVEL
qooe
nnn fe
- 293+ ef
eno
a+
-------- - +--+}
+--+
- ----------- --+-+-
Adjustment
H-rate
[PRE-PRO
i n
F i g .
2 - 2 ,
a d j u s t
R215 (LIGHT
B Syeone
HBLCOMP-Y VRs_ | Before performing deflection adjustments, |
of the
1:1
BOARD]
[MOTHER BOARD} | * (eve. - ie oe
level
incellatio
i
indi
TA:
,
E
ou.
— IPREPRE
VBLCOMP-Y VAs. | Preset the following VRs as indicated,
:
pate
matches the blanking-period level.
Board]
LIGHT
&®
PHASE SH COMPVRs
1. Measure G12) at the H-rate and adjust
the H BL COMP-Y
VRs to obtain flat
[CM Board]
waveforms.
Signal pariod'—-|
H BL COMP-R VRs
2. Measure
at the V-rate and adjust
Blanking period
H BL COMP-B VRs
the V BL COMP-Y
VRs to obtain flat
Fig. 2-2
SH COMP-R VRs
waveforms:
2
eee
[DET Board]
SH COMP-B VRs
3. Measure
at the H-rate and adjust the
3.| Rough
Oscilloscope
R305 (FOCUS)
© Set the IRIS SWITCH to AUTO
1D
VBLCOMP-8 VR:
PHASE SH COMP VAs to obtain flat
Adjustment | /H-rate
prepre
(DEF & HV BOARD]
waveforms.
i
M
and adjust R305 (FOCUS) so
E
V BL COMP-R VRs
-
Jofthe
10:1
RD]
1.
Measure
:
{B. SET Board]
4. Measure (017) at the H-rate and adjust
FOCUS and
BOA
that the waveforms
are maximized
and
POINT @
DY. FOCUS VRs
the H BL COMP-R
VRs to obtain flat
phase Sines become
clearly observable,
as
[MOTHER Boara] [MOTHER BOARD]|
waveforms.
once
VIDEO OUT ROB (Y-B CARR. aly
Foe ines Mi
5, Measure
at the H-rate and adjust
ROG (R-Y CARR. BAL.
the H BL COMP-B VRs to obtain fist
[AGE BOARD)
waveforms.
'4
sa
tea ey, ts
a
adjust
the SH
COMP-R
VRs
to obtain
i
flat waveforms.
Fig. 2-3 (a)
7. Measure
at the H- and V-rate, and
,
FF)
adjust the SH COMP-B VRs to obtain
cea
loe AES
flat waveforms.
'aun
atetaiemanblyaanist
8. Measure €16) at the V-rate and adjust
1. Measure VI
pol
iaaiete
POINT (A)
the V BL COMP.B
URe to obtain flat
ROB (Y-B
CARR. BAL.) and R06 ee
waveforms,
CARR.
BAL.)
so
that
the
carriers
aré
MOTHER BOARD
9. Measure
at the V-rate and adjust
minimized as shown in Fig. 2-3 (b).
the V BL COMP-R
VRs
to obtain
flat
* As to th
KVR
mh
:
waveforms.
che ch OROIUSTHIENS TOeK.
10. Measure POINT @® at the H- and V-rate,
:
and adjust the DY.FOCUS VRs to obtain
Fig. 2-3 (b)
TIONS".
fl
tL
i
at waveforms.
i
14E (No. 5550)
(No. §550) 13E
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