Sony D-555 - Electrical Adjustments; Adjustment Preparation and Checks; Focus Bias Adjustment; Tracking Balance Adjustment

D-555/Z555 |
SECTION 3
ELECTRICAL ADJUSTMENTS
Notes on Adjustment
iV
ty
Perform adjustments except for RECHARGEA-
BLE VOLTAGE ADJUSTMENT and BATTERY
DISPLAY ADJUSTMENT in service mode. Be
sure to release service mode after completing
adjustment.
(Refer to ‘Service Mode (service program)’’ on
page 5.)
. Perform adjustments in the order given.
. Use YEDS-18 disc (part No.: 3-702-101-01) unless
otherwise indicated.
. Power supply voltage: DC 9 V
HOLD switch: OFF
PREPARATION
Put the set into service mode (see page 5) and per-
form the following checks. Repair if there are any
abnormalities.
I.
7
“
nN
Sled Motor Check
Press the OPEN button and open the top panel.
. Press thep>P| , Kd keys and make sure that the
UPF moves smoothly, without catching, from the
inmost ~ outmost > inmost circumference.
p> : UPF moves outward
kd<q : UPF moves inward
Focus Search Check
. Press the OPEN button and open the top panel.
. Press the P¥B key. (Focus search is performed
continuously.)
. Observe the UPF objective lens and check that it
moves smoothly up and down with no catching or
noises.
. Press the Mf key.
Check that focus search operation stops. If it does
not stop, press the Ml key again longer than before.
But disc motor continues rotating for a while by
inartia.
VC (1/2 Vcc) Connecting Point
FOCUS BIAS ADJUSTMENT
TRACKING BALANCE ADJUSTMENT
When the adjustments above are performed, connect
the O side of oscilloscope to the point below.
oscilloscope
to adjustment
Point
10
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