Mamiya ZE-2 - Check by Tester; Incorrect Shutter Speed at M Mode

B. Check by tester
l. Incorrect shutter speed at M mode
Connection of tes ter
terminal Tes ter
Red
(+)
Black
indi -
e-) cates
Pink leadwire land
Body
Approx
on
MPCB earth
5.9V
(l )
(2)
ICS-NO. 5 pin
"
Approx
2.9 V
(3)
ICS-NO. 2 pin
"
Ap prox
0.3 V
ICS - NO. 6 pin
Approx
But,
at 1/ 1000.
5.9V
(4)
(When shifting the
"
shutter peed to s1ower,
the voltage wi11
reduce)
ICS-NO.
3 pin
"
Approx
(5)
But
unsolder purp1e 0.2 V
1eadwire from memory sw.
(0.7V)
By D.M
TR7 -
Collector
"
Approx
5.9V
(6 )
Ditto, but in operating
ov
"
shutter
ICS - NO. 1 pin
"
(7)
NO.
7
pin
TR7 - Base
But
in operation shutter
at 1 sec.
-27-
Selector: M
Main
SW : ON
Checking point
1) Broken or ma1so1dering of pink
leadwires .
2)
Loosened
earth screw of MPCB
3)
Contact efficiency of reverse
side selector brush
4)
Broken
or malsoldering
of
1eadwire from selector
1)
Malsoldering of VRS
2)
Malsoldering of R44, R45,
R46
3) ICS-Malsoldering
1) C12 - Ma1so1der
2)
Yellow 1eadwire - Broken
malso1der
3) T R8 - malso1der
1)
Purp1e
leadwire- Broken,
ma1so1der
2)
Memory SW -Chattering
1)
Green
leadwire- Broken,
malsolder
2)
TR7. DS- Nalsolder
1) R47, 48- Malsolder
2) T R7- Malso1der