Panasonic PV-M2738 Operating, Руководство по обслуживанию

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Opener Lever
Cassette Door Tab
View "A"
Cassette Door-Lid
Cassette Door-Lid
VCR Unit
View "A"
Press
CAUTION
Portion "a"
Top Plate
Tab
Lever
Lever
Hole Hole
Holder Unit
Tab
Slide
+
P2552
Unsolder
Chassis
Motor P.C.B. of
Motor Block Ass'y
Rear Side View
-
P2551
DC Power Supply
(+10VDC)
"a"
"c"
"b"
"a" "b"
Load
Unload/Eject
Main Cam Gear
Needlenose Pliers
HOT CIRCUIT
Primary circuit exists on the Main C.B.A., TV Main C.B.A., and
TV Power C.B.A.
This circuit is identified as "HOT" on the C.B.A. and in the
Service Manual. Use extreme care to prevent accidental shock
when servicing.
SERVICE MODE
In order to inhibit detection of the Supply & Takeup Photo
Transistors, Reel Sensor, and Cylinder Lock, place a jumper
between TP6001 and GND.
In this mode, Mechanism movement can be confirmed. When
removing Cassette Up Ass'y, it can be confirmed without a
cassette.
To release from this mode, remove the jumper between
TP6001 and GND.
INSTALLATION OF VCR UNIT
CAUTION
1. Swing the Cassette Door -Lid all the way open until the
Cassette Door tab clears the Opener Lever.
2. Make sure that all guide tabs are aligned properly. Then,
press the VCR Unit straight in.
Fig. 3
METHOD FOR LOADING/
UNLOADING OF MECHANISM
(Manual Method)
Turn the Main Cam Gear counterclockwise (for loading) or
clockwise (for unloading) using needlenose pliers etc.
Note:
Do not use this method if Mechanism is jammed or locked.
Fig. 4-1
(Electrical Method)
Remove the solder as shown and apply +10.0 VDC Power
Supply (DC + to Portion "a," DC - to Portion "c").
Note:
Be careful not to let the DC Power Supply Unit GND contact
the chassis GND. This may damage the Loading Motor Drive
IC (IC 2501).
Be sure to apply DC + to Portion "a" of Motor P.C.B.
If DC + is applied to Portion "b", the Loading Motor Drive IC
(IC2501) may be damaged.
Fig. 4-2
Note:
Do not forget to solder Portions "a" and "b" after loading/
unloading operation is completed.
When loading without a cassette, press Portion "a" on
both sides of the Holder Unit of Cassette Up Ass'y so that
the Levers clear the Tabs and Holes.
Fig. 4-3