Polaroid Joshua Captiva, Service Manual

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5 - 3
Battery -
B
Note: Flex Shown Completely
Unfolded (Contact Side Up)
Motor +
To Erect (Power) Switch
See Fig. 5-2
To Connector on
Rear of Shutter
Assembly
G N D
B+
Mo to r +
M o to r -
G N D
Motor -
V E R
V C C
G N D
Tri m +
S1 A
Tri m -
F u l l
Ch am b e r
D KE C
S1B
E O P
SPD
5. Troubleshooting
Introduction
The Joshua Camera employs electronics of a unique design, utilizing a single PC Board mounted within the
Shutter Subassembly. A single Flex interconnects the PC Board, Battery, Motor, 3-wire Erect (Power) Switch
and 5-wire Logic Switch (Figures 5-1, 5-2 and 5-3).
Because analysis of PC Board performance, in most cases, would require an oscilloscope and other fairly
sophisticated test equipment, it is not a practical field troubleshooting procedure at this time. Thus, if a camera
failure is traceable to the PC Board, the present recommended procedure is to replace the entire Shutter/PC
Board Assembly.
Limited repair experience thus far from early returns also indicates that some problems are related to rework
piece parts, notably in the Mainframe and Mirror Catcher. Hence most repairs at this time will necessitate
replacing sub-assemblies (Mainframe, Door, Erect System or Shutter), rather than individual parts.
Note: Certain Joshua piece parts are available, which may offer
solutions to some service problems encountered. In such
cases, the piece part should be replaced, rather than an entire
sub-assembly.
In the near future when defective cameras can be analyzed with less sophisticated equipment, and when
reworked piece parts are not used, a set of troubleshooting charts will be available. In the meantime, use the
procedures and guides which follow to troubleshoot Joshua Cameras, starting with the Joshua Camera
Functional Check.
Figure 5-1. Joshua Camera Flex Interconnections
To Logic Switch
See Fig. 5-3