Toshiba IK-M40A User manual

SERVICE DATA
FILE NO. 410 - 001
CCD
COLOR
CAMERA
|
Model
IK-M40A
SERVICE
MANUAL
PRINTED IN JAPAN Mar. 1991 (S)

CONTENTS
SECTION 1
GENERAL DESCRIPTION ....... 1
SECTION 2
MAIN SPECIFICATIONS ........1
SECTION 3
ELECTRICAL ADJUSTMENT
PROCEDURES ..........--+-+2+22
1. Preparation before Adjustment and
Check Items ..........ccccscscsscsccsecssecensssssessesons 2
1-1. Before Adjustment ............-+eeeeeeee 2
1-2. Equipment Required ..............++.6++- 2
1-3. Preparation .........cce cece ees e seen eee 2
2. FIOW Cart ...sscrcssesscssssoseccsocensonsccecsosssenscssorss 3
3. Adjustment Procedures .........ecsresesreeerees 4
3-1. Initial Setting ........ cece eee e eee cece 4
3-2. VOFD Adjustment ........-..e ec eeeeeees 4
3-3. Input Level Adjustment....... serie tieeie oe 4
3-4. VAP Adjustment ..... ChE SERA Ree awewelee 4
3-5. YT Setting ........ cece cece cece ee eee eens 5
3-6. R Matrix Adjustment ..............seee05 5
3-7. B Matrix Adjustment ............-..s008- 6
3-8. CIIR Level Adjustment ...........---056. 6
3-9. Burst Level Adjustment ...........ese06- 6
3-10. W.B. Adjustment ......... 5. cece eee eee 6
3-11. White Clip Adjustment ............-+-- 7
3-12. AWB1 Adjustment ...........eeeeeee eens 7
3-13. AWB2 Adjustment ...........eeeeeeeeees 7
3-14. AWB3 Adjustment ........ cece essen eee 7
3-15. AGC Adjustment ........ cece ee sees eens 7
3-16. Shutter Operation Adjustment ...........- 8
3-17. External Sync Check ........ ees eeeeeeeee 8
3-18. 30m Cable Picture Quality Check .......... 8
3-19. Fimal Check ...... ccc ccc c cece eee eeceeens 9
SECTION 3
SERVICING DIAGRAM .........10
1. BLOCK DIAGRAMS AND CIRCUITS.. 10
1-1. Wiring Diagram ........ 2 dua taieeeoeess 10
1-2. CCU Block Diagram .........-seeeeeees 12
1-3. Rear 1 Circuit Diagram ...... pe eens Ss 14
1-4. Camera Head Block Diagram ......+++-+> 14
1-5. Front Circuit Diagram ........--+++eeeeee 5
1-6. Commector ........ cece e ese e cece ceeers 15
1-7. Mother Circuit Diagram ......---e+e+ee> 16
1-8. Main 1 SG1 Circuit Diagram ........---- 17
1-9. Main 2 SG2 Circuit Diagram ......-+-++> 20
1-10. Main 3 Pre Amp Circuit Diagram .....--- 23
1-11. Main 4 AWB Circuit Diagram ......+-+-- 26
1-12. Video Circuit Diagram ..........eeeeeees 29
1-13. Driver Circuit Diagram ........6ee+eeee- 32
1-14. Mead FPC Circuit Diagram .....---+++6++ 34
1-15. Rear 2 Circuit Diagram ........+6e+eeee 36
2. PRINTED CIRCUIT BOARD........... soe dD
2-1. Rear 1 PC Board ........6... ee eeee cress 38
2-2. Wead Unit PC Board .........eeseeerers 38
2-3. Front PC Board ........eeee ee eeeeecees 38
2-4. Connector PC Board ........eeeeeeeeres 38
2-5. Mother PC Board ..........-¢ esse 2.38
2-6. Main PC Board ........seeeee cece ereees 39
2-7. Video PC Board ........eeee ee erccececs 40
2-8. Rear 2 PC Board ........ cece ener eens 40
2-9. FPC PC Board ......ccceeeeeeeeees oe Al
SECTION 5
EXPLODED VIEWS
AND PARTS LIST .......--+++-+- 42
1. EXPLODED VIEWS......ccssscssoosreees nenensie a
1-1. Unit Assembly ......... 5c ee cee rene eens 43
1-2. Camera Head Assembly ......---++eeeee> 44
1-3. Packing Assembly .........2+-seeeeeeees 45
2. PARTS LIST. ........ccssscccssccrresssnererenecessnnses 46

SECTION 1
GENERAL DESCRIPTION
The
CCD
camera
IK-M40A
is
a
color
camera
which
has
To
obtain
full
performance
of
CCD
characteristics,
the
an
ultra
compact
sized
camera
head.
camera
head
and
the
camera
control
unit
have
been
A
1/2
inch
type
CCD
consisting
of
total
pixel
of
410,000
adjusted
in
the
pair.
So,
when
making
a
service
which
is
used
as
an
image
element
and
it
provides
horizontal
requires
readjustment,
always
perform
the
adjustment
in
resolution
of
higher
than
460
TV
lines.
that
pair.
SECTION 2
MAIN SPECIFICATIONS
Power supply
[Semnggean
[ Seanfrequency | 15.734 i, V 5994 He
DC 12V + 0.5V
1/2", CCD image sensor, effective pixels 768H x 494V
6.54 x 4.89mm (1/2 inch type)
Internal/external, automatic switching
Resolution
___|
A:
More
than
460
lines,
V:
More
than
350
lines
Minimum
intensity
of
illumination
for
objects
VBS 1.0 Vp-p (BNC terminal), NTSC system,
‘Video output Y/C separation output (S terminal)
Output impedance
Input
VBS L.0 Vp-p (BNC terminal), 75 ohms unbalanced
External sync
Adjustment function | Subcarrier phase, I] phase
White balance
Front switch
Rear switch
Auto/push to set/ manual
SENS UP (+6 dBs)/ON/OFF
1/60, 1/100, and high speed shutter selectable
Selectable one of seven:1/125, 1/250, 1/500, 1/1000, 1/2000,
1/4000, 1/10000
—-10°C — 40°C/less than 90%
Electronic shutter
Environmental temperature/humidity
Camera head 0.56 oz (without lens)
Camera control 1.37 Ibs
Weight
f=3mm, 4mm, 7.5mm, 15mm, 24mm
Camera cable 2m, 5m, 10m, 15m, 20m, 30m

SECTION 3
ELECTRICAL ADJUSTMENT PROCEDURES
1. Preparation before Adjustment and Check Items
1-1. Before Adjustment
The Adjustment procedures in this manual should be used
only when some electrical components are replaced and
related electrical adjustments are needed.
When some failures occur, always locate the failures
using measurement equipments and perform repairing ,
replacing, and then make required adjustments. Do not try
to make any adjustment before you do not find the
location(s).
Moreover, some of failures may not require readjustment,
so always perform the adjustment as required.
1-2. Equipment Required
1. Oscilloscope 5mV/div., 2 channels
2. Color video monitor
3. Lighting
Halogen lamp (SOOW) x 2
Note:
If unevenness illumination exists on the pattern surface,
correct adjustment will not be performed, so adjust
lighting devices until flat illum ination is obtained.
4, Camera adjustment chart
Color bar chart 70909322
Gray scale chart 70909321
Note:
- Use new test charts without dirt
5. Adjustment drivers
6. Color temperature conversion filter (C16)
7. Tripod, lens, and AC adapter
(or DC12V power supply)
8. Connection cables
(video cable, S terminal cable)
9. Vector scope
1-3. Preparation
1. Place the chart at a position of about 50cm in front of
the camera, and adjust light positions so that flat
illumination is obtained at the test chart.
2. Connect the video output signal to the monitor and
terminate it with a 75 ohm resistor.
3. Set switches on the CCU (Camera Control Unit) as
follows:
¢ Front panel
POWER
WHITE BALANCE FULL AUTO
AGC OFf
Note:
Perform the adjustment in a place free from dusts,
rubbish, etc. so that the camera head is free from dirty.
¢ Rear panel
SHUTTER
4, How to open CCU
1) Disconnect all cables connected to the CCU.
2) Remove three screws on bottom of the CCU.
3) Pull out the cover by sliding it in the direction A
shown.

2. Flow Chart
The adjustment procedures given in this manual are
described in the order required to perform all items. In
practical field, perform only the items required according
to the servicing carried out.
ONAAMWRWNE
. Initial setting
. VOFD Adjustment
. Input level Adjustment
VAP Adjustment
. YH Adjustment
. R matrix Adjustment
. B matrix Adjustment
. CHR level Adjustment
. Burst level Adjustment
. WB Adjustment
. White clip Adjustment
. AWB1 Adjustment
. AWB2 Adjustment
. AWB3 Adjustment
. AGC check
. Shutter operation check
. External sync check
. 30m cable picture quality check
. Final check
TP22 TP32
e) e)
Main P.C. Board
Video P.C. Board

3. Adjustment Procedures
3-1. Initial Setting
Adjusting point: RV41, RV42
1.. Set front switches as follows:
POWER
WHITE BALANCE
GAIN
SHUTTER
FULL AUTO
2. Turn RV4i clockwise and RV42 fully counter
clockwise.
3. Check to see POWER LED is turned on.
Check to see AWB LED is turned on.
3-2. VOFD Adjustment
Test point: Q202 emitter
Test equipment: Oscilloscope
Adjusting point: RV32
1. Shoot the gray scale to fill whole screen. Open the lens
aperture to maximum so that saturation occurs
sufficiently.
2. Adjust RV32 until emitter output of transistor Q202
shows 1000mV + 50mV.
eT
i ii
VN
3-3. Input Level Adjustment
Test point: TPS1, TPS2
Test equipment: Oscilloscope
Adjusting point: Lens aperture, RV21
1000 +50mvV
1. Shoot the gray scale to fill whole screen and adjust
lens aperture until waveform at TP51 shows
450 mVp-p.
3-4. VAP Adjustment
Test point: TP56
Test equipment: Oscilloscope
Adjusting point: RVS1, RV52
1. Shoot the gray scale to fill whole screen. Check
amplitude of waveform at TP56 is minimum. (If not,
perform following steps.)
2. Turn RV51 fully clockwise and adjust RV52 so that
waveform amplitude at TP56 shows minimum.
3. Turn RV51 counter clockwise and then the waveform
will appear again. Further turning in counter clockwise
direction decreases the amplitude. Fix the adjustment
at the minimum position.

3-5. YH Setting
Test point: TP51, TPS7
Test equipment: Oscilloscope
Adjusting point: RV92, RV62
1.
2:
Remove the lens cap and adjust RV92 (M.PED) until
pedestal level at TP57 shows 50 mVp-p.
Shoot the gray scale to fill whole screen. Adjust lens
aperture until waveform level of 450 mVp-p is
obtained at TP51.
. Adjust RV62 so that white part of the gray scale shows
720 mVp-p at TP57. (Hereafter, this level is called
gray scale shooting.)
3-6. R Matrix Adjustment
Test point: TP55S
Test equipment: Oscilloscope
Adjusting point: RV53, RV54
1. Shoot the color bar chart to fill whole screen and to
obtain 630 mVp-p at white at TP57. (Hereafter, this
operation is called a color bar shooting. )
2. Check waveform image at TP5S is doubled or not.
If doubled adjust RV53.
3. Turn RV54 fully clockwise.

3-7. B Matrix Adjustment
Test point: TPS3
Test equipment: Oscilloscope
Adjusting point: RV55
1. Perform the color bar shooting at TP53. Adjust RV55
until the following relation is obtained among Ye
level, G level and B level.
G>Ye>B
3-8. CHR Level Adjustment
Test point: TPS7
Test equipment: Oscilloscope, vector scope
Adjusting point: RV56 — 61
1. Shoot white part of the color bar at center of the screen
and set the white peak to 0.7V at TP57.
2, Adjust RV56 and RV57 for minimum white carrier.
3. Shoot red part and blue part of the color bar at center
of the screen respectively. Adjust color gain with
RV58 & RVS59, and hue with RV60 & RV61 to obtain
the values given in the table. ,
[eee
6
3-9. Burst Level Adjustment
Test point: TPS7
Test equipment: Oscilloscope
Adjusting point: RV65
1. Adjust RV65 so that burst level at TP57 shows
0.28 Vp-p.
3-10. W.B Adjustment
Test point: TPS7
Test equipment: Oscilloscope
Adjusting point: RV56, RV57
1. Shoot the gray scale to fill whole screen.
2. Adjust RV56 and RV57 alternately until carrier signal
of stair step waveform shows minimum.

3-11. White Clip Adjustment
Test point: TPS7
Test equipment: Oscilloscope
Adjusting point: RV65
1,
Shoot
the
gray
scale
to
fill
whole
screen.
Open
the
lens
aperture
so
that
sufficient
saturation
occurs
on
the
waveform.
Adjust
RV65
until
0.85V
is
obtained
at
TPS7.
3-12. AWB1 Adjustment
Test point: TP44, TP45
Test equipment: Oscilloscope
Adjusting point: RV41, RV42
1.
Shoot
the
gray
scale
to
fill
whole
screen
with
the
Specified
color
conversion
filter
(C16)
attached
and
to
obtain
700
m
Vp-p
at
white
peak.
2.
Adjust
RV41
until
hue
is
brought
onto
R
~
Y
axis.
Then,
adjust
RV42
until
the
carrier
level
decreases
to
1/2.
~
3.
Check
4.9V
+
0.3V
is
obtained
at
TP44
and
T
P45.
(If
not,
turn
RV41
fully
clockwise
and
RV42
fully
counter
clockwise,
and
return
to
the
Step
3-2.)
4.
Short
circuit
TP42
and
TP43
with
a
clip,
and
adjust
RV41
and
RV42
to
make
white
balance.
Remove
the
clip
after
the
adjustment.
R-Y
3-13. AWB2 Adjustment
_ Test point: TPS7
Test equipment: Oscilloscope
Adjusting point:
1.
Shoot
the
gray
scale
to
fill
whole
screen,
and
make
sure
the
carrier
is
within
0.1V.
2.
Remove
the
color
temperature
conversion
filter
and
shoot
the
gray
scale.
Make
sure
the
carrier
is
within
0.1V.
3-14. AWB3 Adjustment
Test point: | TP57
Test equipment: Oscilloscope
Adjusting
point:
R,
B
controls
(RV90,
RV91)
1. Set the AWB SW to SET position.
2.
Shoot
the
gray
scale
to
fill
whole
screen.
Push
the
SET
button
and
check
carrier
is
within
0.1V.
Also
check,
the
AWB
LED
will
change
from
blinking
to
lighting
up
under
this
condition.
3. Set the AWB SW to MANU position.
Adjust
FRONT
R
and
B
controls
for
minimum
carrier.
Make
sure
the
AWB
LED
is
tumed
off.
3-15. AGC Adjustment
Test point: TPS7
Test equipment: Oscilloscope
Adjusting point: GAIN SW
1. Shoot the gray scale to fill whole screen.
Adjust
the
lens
aperture
until
white
peak
shows
0.28V.
2.
Turn
on
the
gain
switch
and
make
sure
amplitude
of
white
shows
0.45V.
3.
Place
the
gain
switch
to
S.UP
and
make
sure
amplitude
of
white
shows
0.63V.
4. Turn off the gain switch.

3-16. Shutter Operation Adjustment
Test point: TP57
Test equipment: Oscilloscope
Adjusting point: SHUTTER SW, SHUTTER VR
1.
2:
ie)
Shoot the gray scale so that white level shows 0.7V at
TPS7.
Set the SHUTTER SW to 1/100 and make sure the
white level shows 0.56V at TP57.
. Turn off the SHUTTER SW.
. Switch the SHUTTER VR on the rear panel from
1/125 through 1/1000 successively, and make sure the
white level will decrease according to the switching.
Also make sure that no abnormality occurs during
above operations.
. Set the SHUTTER SW to OFF and the SHUTTER VR
to 1/125.
3-17. External Sync Check
Test point: VIDEO OUT
Test equipment: Oscilloscope, monitor
Adjusting point: H phase VR (RV01)
1. Feed an external sync signal (VBS or BBS)
2. Check the external sync signal and the camera VIDEO
output are synchronized. If not, turn RVO1 to adjust
SYNC position.
3. Check scope display shows no abnormality.
3-18. 30m Cable Picture Quality Check
Test point: TPS7
Test equipment: Oscilloscope, monitor
Adjusting point: RV32
1. Connect a 30m cable and make sure no abnormality
occurs on picture quality. Use the gray scale and the
color bar. (In this case also make sure the waveform
does not show any abnormality.)
2. Shoot excessively high incidence light with the 30m
cable connected and make sure there is no vertical
stripes or no discoloring occur at the light incidence
part. If not, adjust RV32 to obtain the best picture
quality.
Measurement condition for item 2 of 3-18
1. Switch positions on the front panel
WHITE BALANCE FULL AUTO
2. Lens:Fully open
3. RV32 adjustment
Counter clockwise Clockwise ~
Vertical stripes Best point Undesirable
coloring at
excessive light
incidence
4. Object: Fluorescent lamp (about 20000 lux)
5. Shoot the object so that it is brought at upper half of
the screen, and make sure undesirable coloring due to
excessive incident light at the upper half and the
vertical stripes at lower half of the screen.