Geräte Informationen:

Yaesu FT-840 Transceiver
Hersteller:
Yaesu
Modell: FT-840
Datum:
Kategorie: Funk und Kommunikation
Gruppe: Transceiver
Beschreibung:
Informationen:
                                    

Folgende Anleitungen sind für obiges Gerät verfügbar:

Yaesu -- FT-840 -- Serviceanleitung
Dateiname: Yaesu-6230-Manual-Page-1-Picture
Dokumenttyp: Serviceanleitung
Seitenanzahl: 166
Dateigröße: 8.20 Mbytes (8602472 Bytes)
Sprache: Englisch
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Qualität: Gescanntes Dokument, teilweise schwer oder teilweise nicht zu lesen.
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MD5: 27f89f792fd6d6e5a5f572581da1f2b0
ed2kID: 1c664cfe55a310bba076235183ab213f
Downloads: 281 seit 27 Juli 2014
Informationen:
Introduction & Chip Component Information................ 1-1

Circuit Board Access, Battery & Lamp Replacement............2-1

Alignment....................................3-1

Block Diagram & Interconnection Diagram.................4-1

Board Unit (Schematics, Layouts & Parts)

MAIN Unit ............................................5A-1

LOCAL Unit ...........................................SB-1

DDS-1 Unit ............................................5C-1

DDS-2 Unit............................................5D-1

OSC Unit .............................................5E1

REG Unit.............................................5F-1

DISPLAY Unit..........................................5G-1

LPF Unit..............................................5H-1

PA Unit .............................................. 51-1

VR-A/-B/-C/-D Unit........................................5J-1

SW-A/-B/-C/-D Unit.......................................5K-1

MIC Unit .............................................5L-1

PHONE Unit...........................................5M-1

Exploded View & Miscellaneous Parts .................... 6-1

Accessory & Optional Board Units (Schematics, Layouts & Parts)

TCXO-4 Master Reference Oscillator
(option).........................7A-1

FM Unit-747 (option).......................................7B-1

YF-112A AM Crystal Filter
(option)..............................7C-1

YF-112C CW Crystal Filter
(option)..............................7D-1

FC-10 Automatic Antenna Tuner
(option)...........................7E-1

MH-1B8 Hand-Held Microphone (accessory)
..........................7F-1

MD-1C8 Microphone (option)..................................7G-1

YH-77ST Lightweight Headphones
(option)...................*......7H-1


This manual provides the technical information necessary for
servicing the FT-840 hf transceiver. It does not include
information on specifications, installation and operation,
which are described in the FT-840 Operating Manual, provided
with the transceiver, or on FT-840 accessories, which are
described in the manuals provided with each.

Servicing this equipment requires expertise in handling
surface-mount chip components. Attempts by non-qualified
persons to service this equipment may result in permanent
damage not covered by warranty.

For the major circuit boards, each side of the board is
identified by the type of the majority of components
installed on that side. In most cases one side has only chip
components, and
the other has either a mixture of both chip and leaded
component (trimmers, coils, electrolytic capacitors,
packaged ICs, etc.), or leaded components only.
Yaesu-6230-Manual-Page-1-Picture
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