Service Note; Power Supply During Repairs - Sony DCR-TRV890E Service Manual

DCR-TRV890E/TRV900/TRV900E
1.

POWER SUPPLY DURING REPAIRS

In this unit, about 10 seconds after power is supplied (8.4V) to the
battery terminal using the service power cord (J-6082-223-A), the
power is shut off so that the unit cannot operate.
This following two methods are available to prevent this. Take note
of which to use during repairs.
Method 1.
Connect the servicing remote commander RM-95 (J-6082-053-B)
to the LANC jack, and set the remote commander switch to the
"ADJ" side.
Method 2.
Press the battery switch of the battery terminal using adhesive tape,
etc.
Method 3.
Use the AC power adaptor.
2. HOW TO TAKE A CASSETTE OUT
WHEN THE MAIN POWER CANNOT
BE TURNED ON
Note: To take a cassette out forcibly as follows when the main power
cannot be turned on, remove the cassette lid, cabinet (L) and cabinet
(R). Apply +4.5 V power from an external power supply to the
loading motor, as shown below. Refer to sections 2-1 and 2-2 for
the procedure to remove the cabinet (L) assembly.
Procedure:
1) Disconnect the CN2913 of VI-151 board.
2) Apply +4.5 V directly to the loading motor as shown to drive
the loading motor that ejects a cassette.
Disconnect CN2913
of VI-151 board.

SERVICE NOTE

Loading motor
— 6 —
DC power supply (+4.5V)
: loading
: unloading