Garmin GI 275 Installation Manual page 387

NOTES
TUNE RESISTANCE POTS ON HEADING ERROR HI AND COURSE ERROR HI TO END OF TRAVEL IN ORDER
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NOT TO AFFECT THE HEADING AND COURSE ERROR SIGNALS.
THE NAV1/NAV2 LIGHTED SWITCH LEGEND MUST BE OBSCURED SUCH THAT ANY NAV SOURCE
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INDICATION ON THE AUTOPILOT MODE CONTROLLER IS HIDDEN FROM VIEW.
INSTALL TRANSFORMER P/N TY-141P OR EQUIVALENT.
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FLIGHT DIRECTOR WIRING TO EXISTING ADI MUST BE DISCONNECTED IF THIS INDICATOR IS USED AS A
STANDBY INSTRUMENT FOR THE GI 275. THIS INDICATOR MUST BE LOCATED IN ACCORDANCE WITH
SECTION 3.2. IF THIS INDICATOR IS BEING RELOCATED TO THE CO-PILOT'S SIDE, WIRING MAY BE
4
CONNECTED IN PARALLEL TO THIS ADI AND MUST BE CONNECTED IN ACCORDANCE WITH THE
MANUFACTURER'S INSTRUCTIONS.
MAINTAIN EXISTING CONNECTION BETWEEN AUTOPILOT COMPUTER AND MODE SELECTOR.
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JUMPER IS REQUIRED FOR DC HEADING/COURSE ERROR SIGNALS.
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THE ILS/GPS APPROACH DISCRETE OUTPUT MUST ALSO BE CONNECTED TO THE BACK COURSE RELAY –
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REFER TO MANUFACTURER'S DOCUMENTATION FOR ADDITIONAL DETAILS.
ATTITUDE TEST SWITCH NOT USED IN ALL INSTALLATIONS. FOR INSTALLATIONS THAT USE AN
ACCELERATION SENSOR TEST SWITCH CIRCUIT, THE GI 275 "PITCH AC OUT HI" PIN (P2752-6) MUST BE
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DIRECTLY CONNECTED TO THE DEPICTED "PITCH INPUT" PIN ON THE AUTOPILOT.
REMOVE EXISTING WIRING FROM THE "A/P DISABLE IN" PIN AND CONNECT THIS REMOVED WIRING TO
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THE GI 275 "GYRO VALID COMMON" PIN (P2752-3).
PIN 32 MUST BE UNCONNECTED FOR ALL INSTALLATIONS. IF A G-895A INDICATOR WAS PREVIOUSLY
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INSTALLED, VERIFY THAT WIRING ON PIN 32 IS REMOVED.
GI 275 GYRO VALID RELAY BECOMES PART OF EXISTING INTERLOCK CIRCUIT AS DEPICTED. SPLICE INTO
EXISTING ACTUATOR INTERLOCK WIRING AS DEPICTED. GI 275 GYRO VALID RELAY IS REQUIRED FOR ALL
INSTALLATIONS, EVEN IF PREVIOUS GYRO DID NOT UTILIZE GYRO VALID CIRCUIT (I.E., G-519/550). REFER
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TO AIRCRAFT WIRING DIAGRAMS TO ENSURE THAT ACTUATOR INTERLOCK CIRCUIT IS PROPERLY
RETAINED.
MAINTAIN EXISTING CONNECTION BETWEEN AUTOPILOT COMPUTER AND AIRCRAFT WIRING.
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CONNECTIONS MUST BE MADE TO THE PILOT'S PRIMARY ADI ONLY.
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Figure B-14 Autopilot/Flight Director Interconnect - Cessna
190-02246-10
Rev. 11
Sheet 5 of 5
GI 275 Part 23 AML STC Installation Manual
Page B-42