Sony DXC-637 - DTL Crispening;Aliasing Adjustment

1E-47 BOARD
CNi
a
[ous
cores
Rv6 RV12
(HE OFFSET) (HF nun, [rs
@
ois[_| a Ltrs
(OTL ALIAS)
TPi0 =Di4 pL2
DL3
RV4
QICRISP.)
oO @ pvt
TPB TP7 (BLK. BAL.)
RvV10
(LEV. DEP.)
Rv9
(DTL CLIP)
— COMPONENT SIDE —
TP2
oO
FL2
LJ Avis@ Orvis
(2H LEV.) (1H LEV.)
FL
Cates Ne
FLi
cv A
(HF PHASE)
RVI
@ (PHASE?)
$i @
qo oF
RVS RV3
(DTLLEV.) (HV RATIO)
DXC-637 (UC)
DXC-637P (EK)
3-17
3-5-16. DTL Crispening/Aliasing Adjustment
Note:
Be sure that “3-5-13. HF Aliasing Adjustment” is completed.
Object: Multi-burst chart
Equipment: Oscilloscope, Waveform monitor
To be extended: PR-208 board
Preparation: @RV5 (DTL LEVEL)/IE-47 board
— Fully clockwise Q
Adjustment Procedure
1. Chart frame = Underscanned monitor frame
2. Test point: VIDEO OUT
Adjusting point: Lens iris
Specification: A= 80+3 IRE (for NTSC)
560 + 20 mV (for PAL)
3. Test point: pin B15 (GND: B1)/extension board
Adjusting point: @RV4 (CRISPENING)/IE-47 board
Specification: B=250+10mV
3. Set the LINE SEL switch on the waveform monitor to “15
LINES”. Select the center of the monitor screen by using
the VAR control of LINE SEL.
Adjusting point: @RV8 (DTL ALIAS)/IE-47 board
Specification: C = Minimum
Note: After adjustment, re-adjust “3-5-13. HF Aliasing
Adjustment”. Then, carry out “3-5-18. H/V RATIO
Adjustment”.