(No.YF073)1-17
SECTION 4
ADJUSTMENT
4.1
PREPARATION
4.1.1 Precaution
Camera system and deck system of this model are specially
adjusted by using PC.
However, if parts such as the following are replaced, an
adjustment is required. The adjustment must be performed in a
Service Center equipped with the concerned facilities.
• EEP ROM (IC102 of MAIN board)
• OP BLOCK ASSEMBLY
• VF ASSEMBLY
• MONITOR ASSEMBLY
In the event of malfunction with electrical circuits, first find a de-
fective portion with the aid of proper test instruments as shown in
the following electrical adjustment procedure, and then com-
mence necessary repair/ replacement/adjustment.
• In observing chip TP, use IC clips, etc. to avoid any stress.
Prior to replacement of chip parts (especially IC), remove the
solder completely to prevent peeling of the pattern.
• Use a patch cord if necessary. As for a patch cord, see the
BOARD INTERCONNECTIONS.
• Since connectors are fragile, carefully handle them in
disconnecting and connecting the FPC.
4.1.2 REQUIRED TEST EQUIPMENT
• Personal computer (for Windows)
• Color TV monitor
• Oscilloscope (dual-trace type, observable 100MHz or higher
frequency). The one observable 300 MHz or higher frequency
is recommended.
• Digital voltmeter
• DC power supply or AC adapter
• Frequency counter (with threshold level adjuster)
4.1.3 TOOLS REQUIRED FOR ADJUSTMENT
•
Alignment tape
To be used for check and adjustment of interchangeability of
the mechanism.
(Video: Color bar signal, Audio: Non-signal)
•
Cassette torque meter
This is used to cheek the back tension and play torque during
mechanism adjustment.
•
Roller driver
To be used to turn the Roller driver to adjustment of the linear-
ity of playback envelope.
•
Cleaning Cloth
Recommended the Cleaning cloth to wipe down the video
heads, mechanism (tape transport system), optical lens sur-
face.
Service Support System
YTU94057-83
INF Adjustment Lens
YTU92001B
INF Adjustment Lens Holder
YTU94087
Camera Stand
YTU93079
Light box Assembly
YTU93096A
Gray Scale Chart
YTU94133A
Color Bar Chart
YTU94133C
Communication Cable
YTU93107A
PC Cable
QAM0099-002
Jig Connector Cable
YTU93082G
Alignment tape
MHP-C
Alignment tape
MHP-LC
Roller driver
PTU94002-2
Cassette torque meter
PUJ50431-2
Cleaning Cloth
KSMM-01
Conn. ring
YTU92001-109
(30.5)
