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REFERENCE
Focus/Tracking Gain Adjustment
A
frequency
responce
analyzer
is necessary
in
order to perform this adjustment exactly.
However,
this gain has a margin, so even if it is
slightly off, there is no problem.
Therefore, do not
perform this adjustment.
Focus/tracking gain determines the pick-up follow-
up
(vertical and horizontal)
relative to mechanical
noise and mechanical
shock when the 2-axis device
operate,
:
However, as these reciprocate, the adjustment is at
the point where both are satisfied.
@
When
gain
is raised, the noise
when
the 2-axis
device operates increases.
When
gain is lowered,
it is more
susceptible to
mechanical shock and skipping occurs more easily.
When gain adjustment is off, the symptoms below
appear.
e The time until music starts
becomes longer for STOP
> DPLAY or automatic
selection (44, PPI buttons
pressed. (Normally takes
about 2 seconds.)
"e Music does not start and
disc continues to rotate
for STOP >PPLAY or
automatic selection (4,
>>I buttons pressed.)
e Disc table opens shortly
after STOP>DPLAY.
e Sound is interrupted dur-
ing PLAY.
Or time count-
er display stops progress-
ing.
low or high
@ More poise during 2-axis
high
device operation.
CDP-502ES/620ES
The following is a simple adjustment method.
— Simple Adjustment —
Note:
Since exact adjustment cannot be performed, remem-
ber the positions of the controls before performing the
adjustment.
If the positions after the simple adjust-
ment are only a little different, return the controls to
the original position.
oscilloscope
(DC range)
Procedure:
main board
enti
TP FE O———7-——_0 +
i
i
TP TEQ- -
. Keep the set horizontal.
If the
set is not horizontal,
this adjustment
cannot be performed due to the gravity against
the 2 axis device.
. Put set in adjustment mode.
(See page 37)
. Insert disc (YEDS-1) and press
> PLAY button.
. Connect oscilloscope to main amp board TP FE.
. Adjustment
RV502
so that the waveform
is as
shown in the figure below. (focus gain adjustment)
VOLT/DIV:
100mV
TIME/DIV:
2mS
®
Incorrent
Examples (DC level changes more than
on adjusted waveform)
low focus gain
VOLT/DIV:
100mV
TIME/DIV:
2mS
TIME/DIV:
2mS
CDP-502ES/620ES
low gain ©)
high gain
6. Connect oscilloscope to main board TP TE.
7, Adjust RV501
so that the waveform is as shown in
the figure below.
(tracking gain adjustment)
VOLT/DIV:
1V
TIME/DIV:
2mS
@
Incorrect Examples (fundamental wave appears)
low tracking gain
VOLT/DIV:
1V
TIME/DIV:
2mS
«high tracking gain
(higher fundamental wave than for low gain)
VOLT/DIV:
1V
TIME/DIV:
2mS
Adjustment Location:
main board
TP GND
TP FE
TP TE
RV502
RV501
aad
tracking
gain
gain
e@ Semiconductor Lead Layouts
C10P20FU
anode
cathode
C10P20FUR
cathode
; cathode
anode
CX20152
|
!
4
(Top view)
CX20198
roi
(Top view)
CX20108
30
(Top view)
CX23035
Marking
side view
MB8416-20LPF
CX23034
24
13
1
12
MSM6404A-44RS
MSM6404-46RS
'3 35
a
oo)
LJ
s
t
(Top view)
M50760-414P
20
18
16
14
12
19
17415 113
1
12345678910
(Top view)
M54543L
NE5532P
NJM4560D-D
NJM4558D-FA
TLO82CP
8765
TC74HCU04P
TC40HOO4P
14131211109
8
1234567
(Top view)
UPD4053BC
161S1413121110 9
12345878
(Top view)
LB1290
{Top view)
M50782SP
0
5
0
Bm
M5218L
CX20106
LF353H
NJM79M12A
|
NJM79M05A
\
iN OUT
EQB01-08G
21DQ05
cathode
enode
HZ6B2L
10YD1.3
HZS5CLL
RD2.7EL1
10E2
RD12EB2
10YD2.4A
RD5.1EB2
RD30EB2
cathode
PH302B
KV1236.
c
anode 7 ae
EBG343;
AA3432!
PG222S'
BR2222:
2SK 152.
iv]
==
2SC200
2SB740.
DTC142
DTC144
DTC114
28D774
2SC267
2SA113
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