Zenith XBV613 Service Manual - Page 91

Mechanism Assembly Mode Check

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DECK MECHANISM ADJUSTMENT 1. Mechanism Assembly Mode Check Purpose of adjustment : To make tools normally operate by positioning tools accurately. Fixtures and tools used VCR (VCP) status Checking Position • Blank Tape (empty tape) • Eject Mode (with cassette withdrawn) • Mechanism and Mode Switch 1) Turn the VCR on and take the tape out by pressing the eject button. 2) Separate both top cover and plate top, and check both the hole (A) of gear cam and the hole (A') of chassis correspond (Fig. C-2). 3) If it is done as in the paragraph 2): Turn the gear cam as in No.2) after mantling the motor assembly L/D. 4) Undo the screw fixing the deck and the main frame, and separate the deck assembly. Check both the hole (A) of gear cam and the hole (A') of chassis correspond (Fig. C-1). 5) Check the mode S/W on the main P.C. board locates at a proper position as in (B) of the Fig. (C-1). 6) Connect the deck to the main P.C. board and perform all types of test. CHECK DIAGRAM Gear Cam Mode S/W BOTTOM VIEW (B) (C) Gear Drive Fig. C-1 Correspondence of the gear cam hole (O) and the gear drive hole (O) Motor Assembly L/D 4-13 Gear Cam (A') (A) Chassis Hole Gear Cam Hole TOP VIEW Fig. C-2

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Purpose of adjustment : To make tools normally operate by positioning tools accurately.
DECK MECHANISM ADJUSTMENT
4-13
1) Turn the VCR on and take the tape out by pressing the
eject button.
2) Separate both top cover and plate top, and check both
the hole (A) of gear cam and the hole (A
’
) of chassis cor-
respond (Fig. C-2).
3) If it is done as in the paragraph 2): Turn the gear cam as
in No.2) after mantling the motor assembly L/D.
4) Undo the screw fixing the deck and the main frame, and
separate the deck assembly. Check both the hole (A) of
gear cam and the hole (A
’
) of chassis correspond (Fig.
C-1).
5) Check the mode S/W on the main P.C. board locates at
a proper position as in (B) of the Fig. (C-1).
6) Connect the deck to the main P.C. board and perform all
types of test.
Gear Cam
Gear Drive
(C)
Mode S/W
(B)
Motor Assembly L/D
Gear Cam
Chassis Hole
Gear Cam Hole
(A)
(A')
Fixtures and tools used
VCR (VCP) status
Checking Position
•
Blank Tape (empty tape)
•
Eject Mode
(with cassette withdrawn)
•
Mechanism and Mode Switch
Fig. C-1
Fig. C-2
CHECK DIAGRAM
BOTTOM VIEW
TOP VIEW
Correspondence of the gear cam hole (O)
and the gear drive hole (O)
1. Mechanism Assembly Mode Check