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3.1 PREPARATION
(1) Precaution
This model does not contain adjustment controls (VR).
General deck system, camera system and monitor system
adjustment are not required. However, if MAIN board need
replacement, please use original EEP ROM on to new
board. Then adjustment are not required. And if parts such
as the following need replacement, special computerized
adjustment are required. 3.4.1 ELECTRICAL ADJUST-
MENT WITH PERSONAL COMPUTER is setup and it ad-
justs using a service support system. Please contact to
JVC Service for detail information.
• OP BLOCK
• EEP ROM (IC102 of MAIN board)
• MONITOR
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, replace-
ment and adjustment, etc.
a) In case of wiring to chip test points for measurement,
use IC clips, etc. to avoid any stress.
b) Since connectors are fragile, carefully handle them in
disconnecting and connecting.
c) Short circuit between operation unit and DECK chas-
sis.
(2) Required test equipment
a) Color TV monitor.
b) AC power adapter
c) Oscilloscope (dual-trace type, observable 100 MHz
or higher frequency)
• It is recommended to use one observable 300 MHz
or higher frequency.
d) Digital voltmeter
e) Frequency counter (with threshold level adjuster)
f) Personal computer
SECTION 3
ADJUSTMENT
3.2 TOOLS REQUIRED FOR ADJUSTMENT
Alignment tape
1
Cassette torque meter
3
PUJ50431-2
INF adjustment lens
5
YTU92001B
Gray scale chart
7
YTU94133A
INF lens holder
9
YTU94087
Camera stand
11
YTU93079
Communication cable
13
YTU93107A
15
QAM0099-002
Alignment tape
2
MHP-C
4
6
YTU92001-111
Color bar chart
8
Light box assembly
10
Jig connector cable
12
Service support system
14
PC cable
16
Fig.3-2-1
MHP-LC
Roller driver
PTU94002-2
Conn. ring
YTU94133C
YTU93096A
YTU93082G
YTU94057-65
Cleaning cloth
KSMM-01
(No.86721)1-19
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