Electrical Adjustment - JVC GC-X3E-DS Service Manual

2.1

ELECTRICAL ADJUSTMENT

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
• OP block assembly
• EEPROM (on the MAIN board)
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
remove solder chips from it and its periphery before
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 ASSY
1
YTU93105
Service support system
3
YTU94057-49
Jig connector cable
5
YTU93106A
Camera stand
7
YTU93079
SECTION 2
ELECTRICAL ADJUSTMENT
Jig connector cable
2
YTU93104B
PC cable
4
QAM0099-002
INF adjustment lens
6
YTU92001B
Light box assembly
8
YTU93096A
Gray scale chart
9
YTU94133A
Cleaning cloth
11
KSMM-01
Smart media card
13
16MB
2.1.3 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
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.
PC cable
QAM0099-002
Fig. 2-1-1 Setup for electrical adjustment with
personal computer (I)
Color bar chart
10
YTU94133C
USB
12
QAM0252-001
PRINTER
Service support system
YTU94057-49
RS-232C
port
MENU
Personal computer
2-1