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3-1
SECTION 3
ELECTRICAL ADJUSTMENT
3.1 ELECTRICAL ADJUSTMENT
3.1.1
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 and
MONITOR board need replacement, please use original
E
2
PROM on to new board. Then adjustment are not required.
And if parts such as the following need replacement, special
computerized adjustment are required (Refer to sec. 3.1.1-
4). Please contact to JVC Service for detaile information.
• OP block
• EEP ROM (IC104 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.
1. In case of wiring to chip test points for measurement, use
IC clips, etc. to avoid any stress.
2. Since connectors are fragile, carefully handle them in
disconnecting and connecting.
3. Shortcircuit between operation un it and DECK chassis.
2. Required test equipment
1. Color TV monitor.
2. AC power adapter
3. Oscilloscope (dual-trace type, observable 100 MHz or
higher frequency)
* It is recommended to use one observable 300 MHz or
higher frequency.
4. Digital voltmeter
5. Frequency counter (with threshold level adjuster)
6. Personal computer
3. Required adjustment tools
For detsails of special jigs necessary for adjustment, refer to
page 1-2 and 1-3 of the Section 1.
4. Setup for E. VF section adjustment
1. B/W VF (For AXM230/SXM330)
Referring to “SEC. 1 DISASSEMBLY” and connect the E. VF
WIRE to CN12 of the MAIN board.
2. COLOR VF (For SXM930)
Referring to "SEC. 1 DISASSEMBLY" and connect the E. VF
FPC to CN11 of the MAIN board.
Note:
•
This adjustmentalls into a special adjustment that requires
a personal computer.
For details, refer to “3.1.1 Preparation”.
Fig. 3-1-1 Connection for Service support system
Service Support
System software
RS232C
COM Port
PC CABLE
Personal Computer
MENU
5. Connection for Service support system
Serial No.
label
Bottom case assy
Parts No.
Adjustment ltem : 3.2
LY20701
Screw
(LY20701)
Содержание GR-SXM335U
Страница 1: ......
Страница 19: ...SECTION 4 CHARTS AND DIAGRAMS 4 1 BOARD INTERCONNECTIONS 5 4 1 2 3 A B C D 4 1 Only for SXM735 ...
Страница 21: ...5 4 1 2 3 A B C D 4 3 4 2 DSP SCHEMATIC DIAGRAM 3 The mark means modified points ...
Страница 27: ...5 4 1 2 3 A B C D 4 9 4 5 LCD CTL SCHEMATIC DIAGRAM NOTES 1 2 The mark means modified points FOR SXM735 ...
Страница 42: ...1 6 Fig C7 L7a 7 L7b 8 9 22 S7a 23 S7a 25 S7a 24 S7b 7a L7c Fig C8 10 8a 26 S8a 27 S8a 28 S8b ...
Страница 87: ...5 4 3 2 1 A B C D E F G H 4 3 4 4 4 1 BOARD INTERCONNECTIONS ...
Страница 103: ...5 4 3 2 1 A B C D E F G H 4 35 4 36 4 17 ELECTRONIC VIEWFINDER SCHEMATIC DIAGRAM FOR AXM230 SXM330 ...
Страница 112: ...5 4 3 2 1 A B C D E F G H 4 23 POWER SYSTEM BLOCK DIAGRAM 4 51 4 52 ...
Страница 113: ...5 4 3 2 1 A B C D E F G H 4 24 CPU MDA SYSTEM BLOCK DIAGRAM 4 53 4 54 ...
Страница 114: ...5 4 3 2 1 A B C D E F G H 4 55 4 56 4 25 CAMERA SYSTEM BLOCK DIAGRAM ...
Страница 115: ...5 4 3 2 1 A B C D E F G H 4 57 4 58 I J K L M N O P 4 57 4 58 ...
Страница 116: ...5 4 3 2 1 A B C D E F G H 4 26 Y C SYSTEM BLOCK DIAGRAM 4 59 4 60 ...
Страница 117: ...5 4 3 2 1 A B C D E F G H 4 27 MONITOR SYSTEM BLOCK DIAGRAM 4 61 4 62 ...