Electro-Mechanical Checks And Adjustments; Head Base Plate Positioning; Microswitch (A) Assembly Clearance; Microswitch (B) Assembly Clearance - Tascam 122 Service Manual

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6. ELECTRO-MECHANICAL CHECKS AND ADJUSTMENTS
6-1. HEAD BASE PLATE POSITIONING
1) Set the deck in the PLAY mode.
2) Push the head base plate by hand in the direc ­
tion of the a rrow and check that the head base
plate and the stopper portion of the mecha ­
nism chassis make contact.
3) If there is any clearance, loosen the two screws
on the head base plate solenoid and reposition
the solenoid until the clearance is eliminated.
There should be
no clearance at
this point .
1---
--t~:::::C:..=.=.::
Stopper portion of
mechanical
chassis
Push by hand
when in PLAY mode
Fig. 6-1
Head Base
Solenoid
Fig.6-2 Head base solenoid location
6-2. MICROSWITCH (A) ASSEMBLY
CLEARANCE
1) I nsert a blank cassette and close the cassette
holder.
2) Loosen the two screws on the microswitch
(A).
3) Move the switch so that actuator of the switch
contacts the safety lever.
4) Adjust the switch position to obtain a clear­
ance of between 0.1 mm to 0.3 mm.
5) Retighten the screws.
Safety lever
Blank cassette
@ @
Safety I ever Bent tip of
switch bracket
Fig. 6-3
6-3. MICROSWITCH (B) ASSEMBLY
CLEARANCE
1) Push the EJ ECT button to open the cassette
holder.
2) Loosen the two screws on the microswitch
(8).
3) Move the switch so that switch actuator con­
tacts the bent projecting portion of the eject
lever.
4) Adjust the switch position to obtain a clear­
ance of approximately 1 mm.
5) Retighten the screws.
Eject lever
I
(6)
Ii
~ I
t
-.... Clearance of
:: appro)(. 1 mm
rl
Fig. 6-4
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