3-1
SECTION 3
ELECTRICAL ADJUSTMENT
3.1 PRECAUTION
1. Precaution
Both the camera and deck sections of this model needs a
personal computer for adjustment except simple adjustment
with potentiometers. If some of the following parts is replaced
for repair or other reason, the repaired set must be adjusted
with a personal computer.
• OP block
• E
2
PROM (IC1003 of MAIN board)
In the event of malfunction with electrical circuits, trouble-
shooting with the aid of proper test instruments most be done
first, and then commence necessary repair, replacement and
adjustment, etc.
1. In case of wiring to chip test points for measurement,
use IC clips, etc. to avoid any stress.
2. Since connectors are fragile, carefully handle them in dis-
connecting and connecting.
3. Shortcircuit between operation un it and DECK chassis.
2. Required test equipment
1. Color TV monitor
2. AC power adapter/charger
3. Oscilloscope (dual-trace type, observable 100 MHz or
higher frequency)
Note :
It is recommended to use one observable 300 MHz
or higher frequency.
4. Digital voltmeter
5. Frequency counter (with threshold level adjuster)
6. Personal computer
Table 3-1-1
3. Tools required for adjustments
INF adjustment lens
YTU92001B
10
INF adjustment lens holder
YTU94087
11
Camera stand
YTU93079
12
Light box assembly
YTU93096A
13
Gray scale chart
YTU94133A
14
Color bar chart
YTU94133C
15
Cleaning cloth
KSMM-01
16
PC cable
QAM0099-002
7
Alignment tape
MC-1
8
Service support system
YTU94057-61
9
Jig connector cable
YTU93106C
5
6
Communication cable
YTU93107A
Torque driver
YTU94088
1
Bit
YTU94088-003
2
3
Chip IC replacement jig
PTS40844-2
4
Tweezers
P-895
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