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TM-1650SDU
The three adjustments
NTSC SUB CHROMA, NTSC SUB PHASE and PAL SUB CHROMA described in this page are basic
adjustments for another three adjustments NTSC 3.58 CHROMA, NTSC 3.58 PHASE, PAL CHROMA and PAL PHASE described
in a subsequent
page. The adjustments
shall be done by using component
parts such as semi-fixed
type VR.
Both
adjustments
in this page and the subsequent
page should be always done at the same time and in accordance with the
specified order. Note that unilateral adjustments should be avoided.
Item
NTSC
SUB CHROMA
Adjustment
NTSC
SUB PHASE
Adjustment
Test equipment
Test points
Adjustment
locations
Signal generator
TP-B : S4 @pin
SUB COLORVR
(NTSC full color bar)
[INPUT PWB]
[INPUT PWB]
Oscillo-scope
W (75%)
-···~·················r·
Cy
_
(A)
1-.
y
Signal generator
(NTSC full color bar)
Oscillo-scope
-
1-.
y
-
Mg
-·*-·
B
G
-
I
R
TP-B : S4 @ pin
SUB PHASE VR
[INPUT PWB]
[INPUT PWB]
Mg
B
-
G
-
R
I
PAL
Signal generator
TP-CR: S4 (IDpin
SUB COLOR VR
SUB CHROMA
(PAL full color bar)
[INPUT PWB]
[INPUT PWB]
Adjustment
Oscillo-scope
s
·············r·
LJ
(C)
_l
....................
l ..
I
I
No.51702
Adjustment procedure
•
Color synchronisation adjustment (NTSC
&
PAL)
have been finished.
•
PAL lissajous adjustment have been finished.
1. Input the NTSC full color bar.
2. Connect the oscillo-scope to TP-B.
3. Adjust the SUB COLOR VR to bring the voltage
of
(A)
in the illustration to 0±40mV.
4. Input the NTSC full color bar.
5. Connect the oscillo-scope to TP-B.
6. Adjust the SUB PHASE VR to bring the voltage
of
(B)
in the illustration to 0±40mV.
7. Input the PAL full color bar.
8. Connect the oscillo-scope to TP-CR.
9. Adjust the SUB COLOR VR to bring the voltage
of
(C)
in the illustration to 520±20mV.
27
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