Sony D-66 - Page 5

SECTION 3
ELECTRICAL ADJUSTMENTS
Notes on Adjustment
1, Perform adjustments except for BATTERY REMAINS
ADJUSTMENT in service mode,
Be sure to release service mode after completing
adjustment,
(Refer to “Service Mode (service program)” on page 4.)
2, Perform adjustments in the order given,
3. Use YEDS-18 disc (part No, : 3-702-101-01) only indicated,
4, Power supply voltage: DC 6V
HOLD switch : OFF
VOLUME knob: MIN
PREPARATION
Put the set into service mode (See page 4.) and perform
the following checks,
«Sled Motor Check
1, Press the OPEN button and open the top panel,
2, Press the DW,K€ keys and make sure that the optical
pick-up block moves smoothly, without catching, from
the inmost->outmost—inmost circumference,
>|: UPF moves outward
Kd :.UPF moves inward
*Focus Search Check
1, Press the OPEN button and open the top panel,
2, Press theif key. (Focus search is performed continuously,)
3. Observe the UPF objective lens and check that it moves
smoothly up and down with no catching or noises.
4, Press the MM key.-
Check that focus search operation stops, If it does not,
press the MJ key again,
Recharging voltage Adjustment
Adjustment method :
VOM (DC range)
main board
omc,
TP6
Connect a tester to TP6 of the main circuit board,
Apply 6V DC from the external power jack CN401,
Adjust RV402 so that the reading of the tester becomes
4,9V —-5V.
Note :Read the value after that the read of the tester
becomes clam,
+3.6V Adjustment
Adjustment method :
cle ai oa
VOM (DC. range)
main board
os
TP7 LL
o&
1, Aadjust the power voltage after applying +3.0V between
the terminals of BATT (AMS),
2, Set the set to the service mode stop status,(see page 4.)
3. Connect a tester to TP7 of the main circuit board,
4, Adjust RV403 so that the reading of the tester becomes
3,55V —3.65V.
5. After performing adjustment, release the service mode.
+5V Adjustment
Adjustment Procedure :
VOM (DC range)
main board
Vomeemtomenn
TPS
' Put the set into STOP state service mode (see page 4),
Connect the VOM to main board test point TP5
Adjust RV401 for 5V0,5V on the VOM reading,
After adjustment, release service mode (see page4),
Nw e
Battery Remains Indication Adjustment
Adjustment procedure :
VOM
(DC range)
main board wa
TP3 (VREF) + :
(IC802@) wage | ce
Make sure to turn ON S401
Apply DC 3.5V both side of battery terminal.
Insert the disc (YEDS-18) and press the bilkey.
Adjust RV801 so that the voltage of TP4 (IC802q)) is
the same as TP3 (V REF),
ee OI
PLL Free Run Frequency Check and Adjustment
Check/“Adjustment Procedure :
frequency counter
7
7
. Open the jumper terminal of Z3 (EFM).
2, Connect a frequency counter to test point TP8 (PLCK)
main board
panes War eaane
TP8 (PLCK)
of the main circuit board,
3, Set the unit to the service mode stop status.(see page 4.)
4, Confirm that the reading of the frequency counter is
4,31+0.01MHz,
If that is not the case, adjust RV504 so that the reading
of the frequency counter becomes 4,.31+0.01MHz,
5. After performing adjustment, release the service mode,
(see page 4.)
6.. Short circuit the jumper terminal which was opened
in step 1 above
| D-66