SECTION 3
ADJUSTMENT
3.1 PREPARATION3.2 TOOLS REQUIRED FOR ADJUSTMENT
(1) Precaution
Alignment tapeCassette torque meter
This model does not contain adjustment controls (VR).12YTU94151A
MC-1
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-
Guide driver (Hexagonal)INF adjustment lens
MENT WITH PERSONAL COMPUTER is setup and it ad-34
D-770-1.27YTU92001B
justs using a service support system. Please contact to
JVC Service for detail information.
? OP BLOCK
? EEP ROM (IC1005 of MAIN board)
? MONITOR
In the event of malfunction with electrical circuits, trouble-
shooting with the aid of proper test instruments most be6INF lens holder Camera stand
5
YTU94087YTU93079
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-Light box assemblyGray scale chart
78
YTU93096AYTU94133A
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
Color bar chartJig connector cable
910
or higher frequency.YTU94133CYTU93106B
d) Digital voltmeter
e) Frequency counter (with threshold level adjuster)
f) Personal computer
Extension connectorCommunication cable
1112
YTU94145C-30YTU93107A
PC cableService support system
1314
QAM0099-002YTU94057-67
Cleaning cloth
15
KSMM-01
Fig.3-2-1
1-18 (No.86722) |
ACEC
