Mechanism; Before Disassembling/Assembling; Notes; Mechanism Operation Check - JVC HR-S5950EU Service Manual

2.1 Before disassembling

2.1.1 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 control circuit detects the mechanism condition
using the rotary encoder's phase (internal switch phase).
Therefore, the parts such as the rotary encoder, control plate,
loading gear and control cam need to be installed correctly in
order for the mechanism to operate properly. (For the mecha-
nism phase adjustment, refer to the installation of each part.)
• For the disassembly procedure of the major parts of the main
unit and notes, refer to the "section 1 disassembly".
• 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. 2-1-1a

2.1.2 Mechanism operation check

When the mechanism is operated without a cassette loaded,
operate the mechanism in the mechanism service mode. (Re-
fer to the "section 1 disassembly".)
SECTION 2

MECHANISM

NG
not hooked all the
( )
way around

2.1.3 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. 2-1-3a
Guide hole (a)
DRIVE LEVER
Gear (a)
Unloading
2-1