Cd Player Adjustments; Eye Pattern - Sanyo DC-D9 Service Manual

CD PLAYER ADJUSTMENTS
,.
a.
PREPARATIONS
(a) Measuring instruments, tools and filter
(1)
(2)
(3)
Test disc. : YEDS 18 (SONY) or etc.
Oscilloscope : SS5711 (1O MHz or dual-phenomenon)
or Memory scope : DSS6521 (Storagescope)
Screwdrivers (non-metallic) for adjustments
b. PARTS LOCATION
TRACKING BALANCE
EYE PATTERN
+
(+)
(+)
OSCILLOSCOPE
_ OSCILLOSCOPE
(-) (-) .
<–!
(3[
. CN102
•~
VR101
TP1
(RF)
TRACKING
TP2(FE)
BALANCE
TP3(TE)
TP4(VC)
?
TEST POINT
c. ADJUSTMENTS
Adjustment
Measuring Input
output
Adjustment
Item
Adjustment value
instrument connection connection
location
(a) Tracking
Oscilloscope —
TP3:TE'
VRIO1
Waveform symmetry
balance TP4:VC
A=B
(b) Checking
Check be sure that the
"eye"
the "eye" Oscilloscope —
TP1:RF
—
pattern is at the center of the
TP4:VC
pattern
waveform and that the diamond
shape is clearly defined