FujiFilm FUJICA GSB45 User manual

REPAIR MANUAL
&
PARTS LIST
FOR
FU..JI PROFESSIONAL CAMERA
· FU"ICA GSB45
.: fil FU~I PHOTO FILM CO., LTD.
26-30, Nishiazabu 2-Chome, Minato-ku, Tokyo 106, Japan

CONTENTS
CONTENTS
FUJICA GS645
I DISASSEMBLY AND REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.
Top cover assembly (1- 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Range
finder assembly (2- 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Film advance mechanism assembly
(3- 1) .. 0 ••••••• 0.. • • • • • • • • • • • • • • • • • • • • • 6
4 Housing assembly
(4- 10) ............................................... 10
5. Front cover mechanism assembly (5- 46) .................................. 12
II REASSEMBLY AND ADJUSTMENT ......... 0 ••••••••• 0 •••••••••••••••••••••• 15
1.
Friction of film take up shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2. Air discharging groove
of the bellows ..................................... 16
3. Adjustment of parallelsim of the front cover mechanism assembly ............. 18
4. Adjustment of shutter setting ............................................ 20
5. Adjustment of focusing (Infinity adjustment) ............................... 22
6. Adjustment of viewfinder (Coincidence of images) .......................... 22
7. Film advance/shutter charge system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.
Shutter release locking mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9. Front cover linkage mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10. Adjustment of electrical circuit ....... 0 •••••••••••••••••••••••••••••••••• 50
III SPECIAL TOOL LIST ...................................................... 57
IV PARTS LIST ............................................................. 61
CONTENTS- 1

DISASSEMBLY AND REASSEMBLY
FUJICA GS645
I DISASSEMBLY AND REASSEMBLY
-1-

DISASSEMBLY AND REASSEMBLY
FUJICA GS645
1. Top cover assembly (1 -1)
o Remove the film advance lever assembly (1 - 33) after removing the set screw
(1 -30).
o Raise the top cover assembly (1 - 1) to remove it after removing three set screws
(1-27, 1-28 and 1-29).
NOTE: Pay attention on the two lead wires extended to the shoe (1- 4).
[REASSEMBLY]
o Be sure to set the film selector knob (1 -9) to the 120 film side before installing
the top cover. If the top is installed with the film selector knob set to 220
film side, the selector lever in the film advance mechanism assembly (3- 1) will
be bent.
o Arrange the associated lead wires properly so that they are not seen through the
viewfinder window, and install the top cover.
o Carefully
combine the top cover with the terminal cover (7- 40) and cover frame
(7 . 50).
o Carefully install
the lock plate (1- 37) so that it will not be overlapped on the
lever (3 -29).
o Check
the shutter release for the operating stroke. The desirable operating stroke
of the shutter release is shown below.
0.3 to 0.5 mm More than 0.5 mm More than 0.3 mm
--11'-* ---;t----
LED turns on shutter is released
-2-

Fig. 1
Fig. 2
"120" must be exposed
Lever runs against
here and will
be bent if "220"
is exposed.
1 - 9
-3-
Fig. 3
DISASSEMBLY AND REASSEMBLy
FUJICA GS645

DISASSEMBLY AND REASSEMBLY
FUJICA GS645
2. Range finder assembly (2- 12)
o Disconnect the associated lead wires so that the flexible PCB assembly (2- 1) can
be removed together with the cover (2 - 13).
o Remove the range finder assembly (2- 12) upward after removing three set screws
(2 -
8X2 and 2 - 9).
[REASSEMBLY]
o Combine the pin (6- 37) of the linkage assembly with the interlock plate (2- 60).
o Secure the flexible PCB assembly (2- 1) on the cover (2- 13) with a piece of
double -sided adhesive tape.
o Combine the photocell (built in the flexible PCB assembly) with the photocell
frame (2- 35), and install the flexible PCB assembly with two screws (2- 2).
Fig. 4
2-52
-4-

-5-
REASSEMBLY
DISASSEMBLy AND FUJICA GS645

DISASSEMBLY AND REASSEMBLY
FUJICA GS645
3. Film advance mechanism assembly (3 -1)
o The following instructions for removal of the film advance mechanism assembly
are for your reference only. A new method may be developed and used.
In this case, however, it must be kept in your mind that the wire assembly
(5- 37) which operates when charging the shutter is associated with the film
advance mechanism. Be careful not to damage or fold the wire.
a.
Remove the bellows from the housing side after removing four set screws
(6- 46).
b. Remove the wire from the pulley base assembly (5-7) by moving the set lever
(5- 33) so that the wire is loosened.
c. Remove set screws (3- 125X3) and screw (3- 126).
d. With the film chamber door and zero reset lever opened, remove the film advance
mechanism assembly (3- 1) upward.
e. When separating the wire from the film advnace mechanism assembly (3- 1),
loosen two eccentric pins (3- 49) on the large pulley.
When the wire is removed once, do not use it again but replace the wire
assembly (5- 37) with a new one.
For wire assembly setting, refer to II- 4 below.
-6-

Fig. 6
DISASSEMBLY AND REASSEMBLY
FUJICA GS645
This portion should not be in
touch with the camera body.
Push the set lever toward the arrow mark.
Detach
the wire from this pulley.
-7-

DISASSEMBLY AND REASSEMBLY
FUJICA GS645
4. Housing assembly (4- 10)
o Remove four set screws (6- 46) from the rail surface.
o Wind
up the film advance lever, and fold the linkage mechanism in a half way.
o
Remove two screws (5- 17) with a pin- face spanner.
NOTE: When reinstalling these screws, be sure to lock them with screw locking
agent.
o
Remove two set screws (5- 18) with a flat head screw driver.
NOTE: When reinstalling these screws, be sure to lock them with screw locking
agent.
o
Remove the gate (5- 76) and two links (5- 67), and take out the housing
assembly
(4- 10) carefully.
NOTE: Pay attenion on the lead wires extended from the shutter assembly.
o When replacing
the shutter assembly with a new one.
Remove the housing assembly (4 -10) as described above, take out the lead wires
from the camera body, remove the rear lens assembly (4 - 57) and hold ring
(4- 56) with a pin face spanner, and then, take out the shutter assembly.
[REASSEMBLY]
£e careful-Rot-to OOld the l€ad wire in-between----the---hellu_ws and housing when
installing the bellows.
If the lead wire is held, the helicoid will not operate smoothly.
When the helicoid is operated to the position for the minimum distance, the lead
wires
must have an extra length.
-10-

Fig. 8
4- 10
Fig. 9
- 11-
DISASSEMBLY AND REASSEMBLY
FUJICA GS645
r5-17X2
0
5-76
The lead wire must
have an extra length
when the helicoid is
operated to the position
for the minimum distance.

DISASSEMBLY AND REASSEMBLY
FUJICA G$645
5. Front cover mechanism assembly (5 -46)
o Do not loosen eight set screws (5-5) unless otherwise necessary. These screws
are used
to adjust the parallelism between the film plane and shutter installing
surface.
o When
these set screws are loosened, adjust the parallelism in accordance with the
instructions in II - 3 below.
o
Do not remove four washers (6- 22) expect when adjusting focusing performance.
o When removing
the front cover mechanism assembly, remove four set screws
(5. 83).
[REASSEMBLY]
o Pay attention on the installing directions of the two holders (5- 45).
o Combine the front cover mechanism assembly with the camera body with the
' lever
(6- 11) released.
o
Open and fold the front cover and make sure that the lever (6 - 11) hooks and
unhooks with the leaf spring (5- 16).
-12-

Fig. 10
5-2.}
5-3 5-I
5-4
=':/__,;' 5-11-ij
e:~ {5-14tl •
5-12 "'/
5-13 _,
e
5-15
5-16 ,_
5-46
-13-
5-17xz
DISASSEMBLY AND REASSEMBLY
FUJICA GS645
[5-49•2
5-46 .. ~ ~
5-47 $)
5-51}
5-52 5-50
5-53

REASSEMBLY AND ADJUSTMENT
FUJICA GS645
II REASSEMBLY AND ADJUSTMENT
-15-

REASSEMBLY AND ADJUSTMENT
FUJICA GS645
1. Friction of film take up shaft.
One stroke of the film advance lever consists of one frame film feeding and shutter
charging. Film feeding length differs depending on diameter of the film wound up
on the film take up shaft.
For the above reasons, the film take up shaft must have a proper friction so
that no force is applied to the film take up shaft by the number of turns of the
counter roller.
o
The spring (6 - 7 4) functions to provide the film take up shaft with a proper
friction. If this spring does not operate smoothly, the film advance lever will
not operate smoothly.
Apply a sufficient volume of Helicolube/Molycote mixed grease.
2. Air discharging groove of the bellows
When the bellows is opened rapidly after loading a film, the bellows will shrink as
vacuum occurs
within the space.
To prevent this occurrence, the camera body has grooves, and to prevent light
leakage
through the grooves, moquette is used.
The
moquette is located behind the rail s1.1.rface;
Note that the function of the moquette affects both the air discharging and light
shielding.
-16-

/
-17-
6-6
6-7
JUSTMENT
REASSEMBLy AND :u~ICA GS645
6-1