Akai VS-2EGN

ADJUSTMENT) ADJUSTMENT]
STEP} ITEM INPUT MODE | TEST POINT PARTS RESULT & REMARKS
Color Bar
from P2003 ,@ Ms
Color Bar REC | (Audio/Pre VR3
Generator PCB)
‘CHROMA:
(NTSC) ) 1) Fully turn the VR4 clockwise.
2) Adjust the chroma Rec Current
so that P203 (@), @) waveforms
are set to 35mVp-p by the VR3.
Rec ba
i Current | i | i -
Color Bar
VR2
from P203) ,@
Color Bar | REC | (Audio/Pre ee
Generator PCB) a ispa i
Y)
ay) bracers sees et
ceeniciziecm nei omens
1) Adjust the Chroma Rec current so
that P203 ) , @ waveforms are
set to 35mVp-p by the VR2.
2) Adjust the Y Rec current so that
the P203 @ , @ waveforms are
set to 150mVp-p by the VR4.
Video Head vez
Resonance NRG
Test Tape (CH1)
12 | andQ | cat-7sog02)| PB | P202@ vel
(quality VRS
factor)
(CH2)
*Refer to the Audio/pre | 1) Fully turn the VR6 clockwise and
P.C Board Adjustment then adjust the VC2 so that the
point (Fig. 11-4)
peak frequency is 5.0MHz.
2) Adjust the VR6 so that “Q” is set
at a ratio of A:B=1:1.2
3) Connect the TP to the GND level
and adjust the CH2 (VC1, VRS)
in the same way as in the CH1.
‘Service Manual VS-2EGN’
113