foc.us 1690 User manual

Focus
Service Manual
October 2007

1. Scanner Introduction
a. See User’s Guide
2. Theory of Operations
a. See User’s Guide
3. Basic Troubleshooting
a. See User’s Guide
4. Revision History
a. 1690
A – June 2005
- Released
B – August 2006
- RoHS compliant
C – Not used
D – May 2007
- Blackfin platform
- IR integrated into Decode board
- Window and Illumination board change
- Camera board running at 35MHz
b. 1633
A – November 2006
- Limited release of 315 to one customer
B – January 2007
- Released
C – Not used
D – Pending Release
- Blackfin platform
- IR integrated into Decode board
- Window and Illumination board change
- Camera board running at 35MHz
c. 1650
A – September 2007
- Released
d. 1890
A – September 2007
- Released

5. Basic IR & Illumination Functions (1690, 1633, 1650 & 1890)
a. IR
i. Two ranges to control which LED pattern is used to illuminate the object
1. Near IR – Unfocused LED pattern is used (0” to ~ 5”)
2. Far IR – Focused LED pattern in used (~5” to ~ 11”)
3. Typical IR operation ranges are:
a. Near – 0” to 4”
b. Far – 4” to 8”
c. When an object is at the near/far transition point the LED
pattern may toggle back and forth between the two modes.
b. Illumination
i. 3 modes of operation (see figure below for LED locations of 1690A &
B, 1633A and B & 1890A – NOTE: 1690D, 1633D & 1650A pattern is
slightly different)
1. Linear
a. 4 focused LEDs (Two are used as the “targeting” beam)
b. For rapid decoding of 1-D codes within linear image frame
c. Default linear image frame: 1280 x 32 pix. (width x height)
2. Near
a. 12 unfocused LEDs
b. For area decoding of a close object.
c. Default area image frame: 1280 x 512 pix.
3. Far
a. 15 focused LEDs
b. For area decoding of a far object.
c. Default area image frame: 1280 x 512 pix.
4. Targeting
a. 2 of the inside Linear LEDs create a “target line” when IR
detects an object.
b. The “line” shows where the camera center line is so the
operator can scan or image the desired object.
window
linear linear
IR
near far
LED locations

6. Torque Values
a. The below table contains the torque value of screws that may need to be removed
and reinstalled during servicing.
b. Screws on non-serviceable components have been omitted.
c. All values are in units of in-lbf and have a tolerance of ±3% of the listed value.
Torque Values for Screws
Model >> 1690 1633 1650 1890
Revision >> A B D A B D A A
External Screws
Top Case (qty 1) 1.6 1.6 1.6 1.6 1.6 1.6 1.6 2.8
Bottom Case (qty 2) 1.6 1.6 1.6 1.6 1.6 1.6 1.6 2.8
RJ45 Assembly (qty 1) 1.6 1.6 1.6 1.6 1.6 1.6 1.6 2.8
BT Bottom Case Cover (qty 1) NA NA NA 1.6 1.6 1.6 NA NA
Internal Screws
Camera Assembly (qty 2) 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6
IR Block Assembly (qty 2) 1.6 1.6 NA 1.6 1.6 NA NA 1.6
All values are in-lbf

7. Disassembly Instructions (1690A & B)
a. Remove 2 labels
b. Remove 4 screws
c. Separate top case
d. Unplug beeper cable
e. Remove window
assembly from top
f. Remove beeper by
bending tab back
and gently pulling
out beeper
Labels
Screws (3 are
under labels)
Unplug
Window
assembly
Beeper tab

g. Unplug camera cable
h. Remove 2 screws to
release camera
assembly
i. Remove decode
board from bottom
case
j. Unplug both cables from decode board
Camera
cable
Camera
assembly
screws (2)
Unplug
cables

k. Remove bottom cover by pushing up on the
end and pull out
l. Remove the interface
assembly
m. Remove cables
Push up
Pull out
Unplug
cables

8. Assembly Instructions(1690A & B)
a. Reverse the disassembly instructions while observing the following key points
b. Interface Installation
i. Insert the interface board
with the bottom side (without
the 2 connectors) facing the
screw insert, into the grooves
nearest the insert of the case
bottom as shown.
ii. Thread the 22 pin flex cable
through the top handle of the
bottom case.
iii. Snap the bottom cover
assembly into place by
pushing down and then in on
the cover to snap it into the handle.
c. Decode Installation
i. Install the cable from a bottom
case assembly into the connector
(J2) on the bottom side of the
decode board.
ii. Loop the interface to decode flex
cable down inside the bottom
case handle and seat the decode
into the case as shown. Do not
allow the cable to interfere with
the trigger. While holding down
on the decode, pull the trigger
and you must hear/feel the button
clicking. If not re-dress the cable
and re-seat the decode and try
again.
iii. NOTE: 16 pin illumination cable
must be installed prior to
installing the decode board.
Interface Install
Screw insert

d. Camera Assembly Installation
i. Install a focused camera
assembly onto the posts,
and install 2 screws.
ii. Install the camera cable
into the camera board.
iii. Do not touch the camera
lens or remove the
camera PCB from the
assembly.
e. Illumination Assembly Installation
i. Install the flex cable
from the decode
board into the
connector on the
window assembly.
ii. Install the window
assembly into the
bottom case inside
the groove.
iii. Verify the capacitor
boot is in the
orientation shown.
iv. Fold and route the
cable as shown.
NOTE: DO NOT ALLOW THE CABLE TO CURVE IN FRONT OF THE COLLECTOR
NOTE: DO NOT TOUCH THE FRONT OR BACK SURFACE OF THE WINDOW
v. Inspect the photodiode shield’s
position. It MUST be flush with the
board and the opening MUST be at the
Install 2
screws here
Photodiode cover
Fold cable
as shown
Capacitor boot

Window groove – Do
not pinch the rubber
Fig. 7
front of the photodiode as shown. If not adjust it accordingly.
vi. Connect the beeper flex cable to the decode board as shown.
vii. Carefully close the top case onto the bottom case ensuring that the
cables are not pinched. The window MUST be captured completely
inside the top case groove. The capacitor retaining post in the top case
MUST slide inside the slot in the capacitor boot when the case halves
are closed. When the top case is about halfway closed rotate it forward
slightly to capture the window in the groove, and then rotate it back.
This helps to ensure the window sits properly inside the case groove as
shown.
NOTE: THE TOP CASE WILL SLIDE ONTO THE BOTTOM CASE WITH LITTLE
RESISTANCE. IF IT FEELS TOUGH TO INSTALL, SOMETHING IS NOT LINED UP
PROPERLY.
f. Case Screws
i. Install 4 screws as shown.
Do not pinch
these cables
with the cases
Capacitor
retaining post