SECTION 2
ELECTRICAL ADJUSTMENT
2.1 ELECTRICAL ADJUSTMENTGray scale chartColor bar chart
910
YTU94133AYTU94133C
2.1.1 Precautions
Both the camera section and deck section of this model
are designed and manufactured to be adjustment-free.
However, if both or either of the following parts is replaced,
it needs special adjustment with a personal computer at a
JVC service equipment after the part replacement
Y OP block assembly
Cleaning clothUSB
11
Y EEPROM (on the MAIN board)KSMM-0112QAM0252-001
When there is some trouble in the electric circuit, it is required
to detect the faulty part with specified test instruments first
and then to proceed to repair, replacement and adjustment.
1. When cheking a signal at a chip test point, be sure to use
an IC clip or the like not to apply any stress to the test point.
When replacing a chip part (IC in particular), completely
Smart media card
remove solder chips from it and its periphery before13
16MB
proceeding to part replacement (in order to avoid exfoliation
of the pattern).
2. Carefully disconnect/connect connectors because they
are apt to get damaged.
2.1.2 Test instruments required for electrical
adjustment
Patch cord ASSYJig connector cable
12
YTU93105YTU93104B2.1.3 Required test equipment
1. Color TV monitor.
2. AC power adapter (AA-V37 or equivalent)
3. Oscilloscope (dual-trace type, for more than 20 MHz).
4. Digital voltmeter
5. Frequency counter (with threshold level adjuster)
6. Personal computer
Service support systemPC cable
34
YTU94057-49QAM0099-002
2.1.4 Setup (LCD ADJUSTMENT)
Setup for electrical adjustment with personal computer
Note 1:As a general rule for adjustment with a personal
computer, connect a personal computer to its
PRINTER terminal.
Note 2:Use DC cord to supply the power.
Jig connector cableINF adjustment lens
56YTU93106A
YTU92001B
PRINTER
Service support system
YTU94057-49
RS-232C
Camera standLight box assemblyport
78
YTU93079YTU93096AMENU
PC cable
QAM0099-002Personal computer
Fig. 2-1-1 Setup for electrical adjustment with
personal computer (I)
2-1 |
ACEC
JVC
