Int Sc Phase Adjustment; Y Clamp Adjustment Ou - Sony CCU-TX7 Service Manual

4-2-5. INT SC Phase Adjustment
Note : The SC-H phase measurement equipment (Tektronix :
Waveform monitor 1765 or equivalent) is used for
this adjustment. In case of using another measurement
equipment, read its instruction manual carefully and
then perform the following adjustment.
Equipment : SC-H phase measurement equipment
To be extended : ES-20 board
Preparation :
* Set the mode of Textronix 1765 to "SC-H" mode.
¢ Make sure that the video signal is not inputted to the GEN
LOCK connector on the CCU-TX7/TX7P rear panel.
Test point : VBS 1 OUT/CCU rear panel
Adjustment Procedure :
* Adujst @RV5 (SC-H PHASE)/ES-20 board so that the
luminance line of BURST (SC) is the same as following
figure.
[For NTSC] [For PAL]
Note : After this adjustment is completed, set the mode of
Tektronix Waveform monitor 1765 to "WFM" mode.
Y LEVEL (VBS)
SYNC LEVEL (VBS) oO
SYNC WIDTH
Rva@®
Rv2
SYNC PHASE
RVE03 RYS02
RV7 HPHasE RVB00
Y SETUP LEVEL
(NTSC ONLY}
RY6 sc PHASE
Ava ort
'SC FREQUENCY
RVS
'SC-H PHASE
GMATBAL2 BWHTBAL AWHTBAL -
Rvs06 «= RVS0S = R500
RV514
BOCBAL
RV513 B LEVEL B-Y GAIN ADJ _8-¥ BLK BAL
CCU-TX7 (E\V1
4-2-6. Y CLAMP Adjustment
Equipment : Oscilloscope
To be extended : ES-20 board
Preparation :
¢ Select the BARS mode on the RCP-TX7 or COU-TX7.
Test point : TP507 (GND : E1)/ES-20 board
Adjusting point : @RV515 (Y CLAMP)/ES-20 board
Specification :A=0+5mV
[For NTSC]
{For PAL]
o8
0°
TP17 TPIS ,
ES-20 Board (A SIDE)