Bulb "B" Operation - FujiFilm Fujica AX-1 Repair Manual And Part List

2.

Bulb "B" operation

Check the ST- printed circuit board for the " B " set position first.
Nest, check voltages on pins 1, 24 and 33 of the HA16517, and check the
parts, wiring and circuit related to these pins.
FUNCTION
PIN NO,
1 Shutter start input
24 Bulb set input
33 Power switch
Relative parts
51 switch
52 switch
Pin 33
Pin 1
NOTE: With the Tr2 and Tr3 circuit, the mirror and 1st shutter blind start
when the S2 switch turns on.
even if the S2 switch turns off, but it starts when the SI switch
turns off also.
Thus, the positions of the shutter release button, namely the 1st
shutter blind start position and 2nd shutter blind start position, are
provided with hysteresis.
REASSEMBLY, REPAIR AND ADJUSTMENT
VOLTAGE AND OCCURRENCE
Refer to Section B - 1.
When setting "Bulb": 0.3V or less;
Normally: 0.7V or more
Refer to Section A - 1 .
SI - 2 switch, S3 switch, ST - printed circuit board,
Tr2, Tr3, R32 (20K ), R33 (20K ), R34 (20K ),
and C15 (0.047 F)
OFF
ON
OFF
H
ON
L
H
L
Circuit power
S2 switch turns off.
supply turns on.
Mirror and 1st
shutter blind start.
The 2nd shutter blind does not start
- 1 1 7 -
FUJICA AX - 1
OFF
OFF
S1 switch turns off and
2nd shutter blind starts.