Disassembling/Assembling Of Mechanism; Before Disassembling/Assembling; Notes; Mechanism Operation Check - JVC HR-J691U Service Manual

DISASSEMBLING/ASSEMBLING OF MECHANISM

1. Before disassembling/assembling

1.1 Notes

This model's mechanism relates closely to the rotary encoder
and system control circuit (the rotary encoder is meshed with
the control cam).
The system circuit detects the mechanism condition using the
rotary encoder's phase (internal switch phase). Therefore, the
parts such as the rotary encoder, control plate, locking gear
and control cam need to be installed correctly in order for the
mechanism to operate properly. (For the mechanism phase
adjustment, refer to the installation of each part.)
• For the disassembling procedure of the main parts of the
main unit and notes, refer to the "Specific items for the prod-
uct".
• Before using a soldering iron, be sure to disconnect the
power plug from the AC outlet.
• Do not touch any of the adjustment points until a defect po-
sition is specified.
• When plugging or unplugging the connector, be sure not to
damage the wire.
• Be sure the springs are hooked all the way around and in
the correct direction.
• When performing repairs, take care not to damage a catch,
etc.
<Example>
OK
Fig. 1-1a

1.2 Mechanism operation check

When the mechanism is operated without a cassette loaded,
operate the mechanism in the mechanism service mode. (Re-
fer to the specific service items for the product.)
SECTION 2
NG
( not hooked all the )
way around

1.3 Setting the mechanism assembling mode

The mechanism-assembling mode is provided with this mecha-
nism. When disassembling and assembling, it is required to
engage this mode.
Set the mode by adopting the following procedures.
(1) Remove the mechanism assembly using the disassembling
procedure.
(2) Turn gear (a) of the loading motor manually to set the mecha-
nism assembly to the eject end mode. Make sure that the
main deck is connected to the guide hole (a) of the drive
lever and the seal (a) of the main deck is connected to the
mark "E" of the control plate. This condition is called the
mechanism-assembling mode.
Seal (a)
"E" mark
CONTROL PLATE
LOADING MOTOR
Loading
Fig. 1-3a
Guide hole (a)
DRIVE LEVER
Gear (a)
Unloading
2-1