EFJohnson 764X, 761X service manual General Information

GENERAL INFORMATION

SECTION 1 GENERAL INFORMATION

1.1 SCOPE OF MANUAL

This service manual contains operation, installa- tion, programming, alignment, and service information for the EFJohnson® 7610 and 7640 mobile transceiv- ers.

1.2 TRANSCEIVER DESCRIPTION

1.2.1 GENERAL

The 7600-series mobile transceivers operate on conventional (non-trunked) channels. The 7610 oper- ates in the VHF frequency range of 146-174 MHz, and the 7640 operates in the UHF frequency range of

400-430, 450-470, 470-490, or 488-512 MHz. Up to 32 channels can be programmed. Power output is user selectable or fixed for the following levels. Refer to Section 3.1 for more information on features.

Model	High	Low 1	Low 2
7610 (VHF)	45W	25W	4.5W
7640 (UHF)	35W	20W	3.5W

These transceivers are digitally synthesized and microprocessor controlled. Transceiver programming is performed using a PC-compatible computer, a spe- cial EFJohnson programming cable, and program- ming software (see Table 1-1). The alignment proce- dure is performed using this same hardware setup, a fabricated test cable, and special Adjust software included with the programming software (see Section 4).

1.3 PRODUCT WARRANTY

The warranty statement for this transceiver is available from your product supplier or from the War- ranty Department, EFJohnson, 299 Johnson Avenue, P.O. Box 1249, Waseca, MN 56093-0514. This infor- mation may also be requested from the Warranty Department by phone as described in Section 1.7. The Warranty Department may also be contacted for War- ranty Service Reports, claim forms, or any other ques- tions concerning warranties or warranty service.

1.4 PART NUMBER BREAKDOWN

The following is a breakdown of the part number used to identify this transceiver.

242 - 7 6 x x - 0	x x
Band			Config.
			2 = Std mic
1 = VHF
			3 = With DTMF
4 = UHF
			mic
Type			7 = w/o mic
			Freq Range
0 = Half duplex, dual
		0	= Full band
IF, high power
Signaling		1	= 400-430 (UHF)
		3	= 146-174 (VHF)
0 = Conventional only
			450-470 (UHF)
NOTE: Not all configurations		4	= 470-490 (UHF)
		5	= 488-512 (UHF)
are available.

1.5 TRANSCEIVER IDENTIFICATION

The transceiver identification number is printed on a label that is attached to the chassis. The following information is contained in the identification number:

	Model		Revision	Manufacture					Warranty
From P.N.			Letter		Date		Plant		Number
	76xx	0 A		23 8			J		12345
8th Digit			Week No.					J = Japan
	of P.N.		of Year			Last Digit of Year

1.6 ACCESSORIES

The accessories available for this transceiver are listed in Table 1-1.

1.7 FACTORY CUSTOMER SERVICE

The Customer Service Department of EFJohnson provides customer assistance on technical problems and the availability of local and factory repair facili- ties. Regular Customer Service hours are 7:30 AM. -

	November 1998
1-1	Part No. 001-7600-001