Sony Discman D-50MkII Service Manual page 21

2-3, OPTICAL PICK-UP BLOCK (FOP)
REPLACEMENT
Optical pick-up block (FOP) can be repaired with-
out removing mechanical section the replacing
method is explained below.
Disassembly: Installation:
Insert. shafts A, B to optical pick-up block
(FOP). (See page 23.)
Install optical pick-up block (FOP).
(Installing procedure is opposite to disassembly
Remove bottom panel.
(See page 21.)
Remove front panel.
(See page 21.)
Remove main board and SW board.
(See page 21.)
Remove optical pick-up block (FOP)
procedure indicated in the light figure.)
Note:
e Arrange flexible board be-
fore installing retainers A,
B,C, D. (See page 23.)
Oil shafts A, B. (See page 23.)
P1.7 x 5.5
vi ~ B1.4x5
© feed rack spring | @ cut portion @® retainer B
nods [Install front panel. |
6
é thy ~o
Install front panel.
(bent)
£ tapping screw
B1.4x5
Na retainer C
When installing
Y/- press portion @
f, with a finger in
the direction of
arrow and tighten
the screw.
Install bottom panel.
(o feed ruck uy
BSTG
Unsolder flexible board
and remove in the
direction of arrow.
1 6) tapping screw
BIL4AxS %
@ retainer A
(8) Unsolder
flexible board.
@ tapping screw
a BIAXS
_@O retainer D
df
Remove shafts A, B from optical pick-up block
_ (FOP). (See page 23 "MECHANICAL SEC-
TION REASSEMBLY.)
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
TURNTABLE
HEIGHT ADJUSTMENT
Procedure:
1. Lock the thrust screw with locking compound.
motor retainer
turntable gear
chassis
turntable
swelling portion
*: swelling portion of turntable
Lock the thrust screw with locking compound.
optical pick-up (FOP) Read current value under no-lead condition.
vt 100 £20 mA.
thrust. screw
Losen thrust screw so that the ammeter reading
is 5 —10mA more than the reading in step 3.
Note: Be careful not to turn the thrust screw too
tightly when tightening, or the current value
will change when the screwdriver is removal.