SECTION 3
ELECTRICAL ADJUSTMENT
3.1 PRECAUTION
3. Tools required for adjustments
1. Precaution
Both the camera and deck sections of this model needs aTorque driver1Bit2
YTU94088YTU94088-003
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.
Y OP block
Y E2PROM (IC1003 of MAIN board)
TweezersChip IC replacement jig
34
In the event of malfunction with electrical circuits, trouble-P-895PTS40844-2
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.
Jig connector cableCommunication cable
56
2. Since connectors are fragile, carefully handle them in dis-YTU93082GYTU93107A
connecting and connecting.
3. Shortcircuit between operation and DECK chassis.
2. Required test equipment
1. Color TV monitor.PC cableService support system
78
QAM0099-002YTU94057-60
2. AC adapter
3. Oscilloscope (dual-trace type, observable 100 MHz or
higher frequency)
Note :It is recommended to use one observable 300 MHz
or higher frequency.
Alignment tapeINF adjustment lens
4. Digital voltmeter910
MC-2YTU92001B
5. Frequency counter (with threshold level adjuster)
6. Personal computer
INF adjustment lens holderCamera stand
1112
YTU94087YTU93079
Light box assemblyGray scale chart
1314
YTU93096AYTU94133A
Color bar chart
15
YTU94133C
Table 3-1-1
3-1 |
ACEC
JVC
