Gasboy 1000 Series FMS Diagnostic Manual - Manual (Page 135)

GASBOY Series 1000
7-16 03/07/03
REPLACING A BUILT-IN MODEM
Remove Old Modem
1. Locate the modem inside the head of the Series 1000. It is mounted on the inside of the
metal plate which holds the MPU PCB.
2. Disconnect the ribbon cable and the 2-position phone line connector from the modem.
3. The modem is secured to four mounting posts which have release levers holding it in place.
Push in the release lever for one of the posts and pull that corner of the modem outward (off
the post) as far as it will go. Repeat this procedure for each post until the modem may be
slipped off the posts and removed. Be careful not to let the modem slip down on the post
and be reheld by the retaining levers.
Install New Modem
4. Install the new modem by pressing it firmly onto the posts until the retaining levers hold it
securely in place. Position the modem so its two connectors are located toward the base of
the Series 1000 head assembly.
5. Reconnect the ribbon cable to the 20-position modem connector so that pin 1 (the red or
dark blue edge of the cable) faces down.
6. Reconnect the 2-position phone line connector to the modem with the green wire facing
downward.
ORDERING INFORMATION: When replacing a modem, first verify the revision level of the
Series 1000 MPU PCB. If the revision level is less than Rev. N, the C05738 Modem
Communication Ribbon Cable must be replaced with C07004 Modem Communication/Power
Cable to allow proper modem operation. Remember to order a C07004 cable with the modem
when required.