Secam Adjustment - Sony trinitron PVM-1450QM Service Manual

PVM-1450QM/1454QM
I 7. PAL CHROMA (ACC OFF) (PVM-1454QM only)
I) Switch ACC Off with the menu.
2) Adjust jCHROMA PAL ACC OFF! in the same manner as
15.-4). (Fig. 23)
18. PAL R-Y LEVEL (PVM-1454QM only)
I) Input a PAL color bar.
2) Connect the oscilloscope probe to JC404 Pin 41 or TP40I.
3) Put the unit into service mode.
4) Adjust j R-Y LEVEL PAL I so that the tops of the waveform
line up as in the diagram below. (Fig. 24)
IC404 41 pin
A
Adjust so that B=D above
60mV max.
B
Fig. 24
9. SECAM Adjustmnet
. J ...
····.J ...
'"f"
20mV max.
*
This must be done after the deflection adjustment.
Note: Varies with H-FREQ, H-BLK, VIDEO-PHASE, ANGLE,
BOW, H-DELA Y, etc.
1. HP EIDTH (NORMAL) ADJUSMTNET (PVM-1454QM only)
The board adjustment in 9.-1. is a rough adjustment and this may
also be managed with the JC317 Pin 10 pulse width.
I) Input a SECAM color bar.
2) Put the unit into under scan mode.
3) Put the unit into service mode.
4) Adjust jHP WIDTH NORI so that the color of the color
section at the top left of the screen almost disappears.
2. HP POSITJOM ADJUSMTNET (PVM-1454QM only)
Note : 9.-2. is the same as above. This adjustment can be managed
with the phase relationship between the start of the pulse at
!C317 Pin IO and the input video signal.
I) Input a SECAM color bar.
2) Put the unit into H/V delay mode.
3) Put the unit into service mode.
4) Adjust
I
HP POSITION I as in the diagram on the right.
3. HP WIDTH (H/V -DL) ADJUSMTNET (PVM-1454QM only)
1) Input a SECAM color bar.
2) Put the unit into H/V delay mode.
3) Put the unit into service mode.
4) Adjust HP WIDTH H/V DELAY as in the diagram below.
Note : Check the HP POSITION and if it is off, repeat 2 and
3.
_J
.,,:;:;~ H-SYNC
l!lfl/J
L
1,···,··················1
Eodof~i
- Start of picture
!
Use HP POSITION to
adjust the block edge
to here.
Use HP WIDTH HN-DL to
adjust the block edge to
here.
4. SECAM COL BALANCE (PVM-!454QM only)
I) Input a SECAM color bar.
2) Connect the oscilloscope probe to TP306.
3) Put the unit into service mode.
4) Adjust I SECAM COLOR BALANCE R-Y I so that the
non-color section forms a straight line.
5) Connect the oscilloscope probe to TP305.
6) Adjust
I
SECAM COLOR BALANCE 8-Y
!
so that the
non-color section forms a straight line.
5. SECAM CHROMA (PVM-1454QM only)
1) Input a SECAM color bar.
2) Connect the oscilloscope probe to IC404 Pin 30 or TP402.
3) Put the unit into service mode.
4) Adjust !CHROMA SECAM jso that the tops of the waveform
line up as in the diagram below. (Fig. 25)
IC404 30 pin
Adjust
so
that the B and D peaks are the
same.
A
C
B
Fig. 25
6. SECAM R-Y LEVEL (PVM-1454QM only)
I) Input a SECAM color bar.
20mVmax.
... J
D
·r
2) Connect the oscilloscope probe to IC404 Pin 41 or TP401.
3) Put the unit into service mode.
4) Adjust I R-Y LEVE SECAM j so that the tops of the waveform
line up as in the diagram below. (Fig. 26)
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