- wiring between the pin A/8 of the relay (12KS1) and the pin A/A2 of the relay (9HQ)

 - RELAY-HORN CONTROL (9HQ)

 - diode module 1160VD

 - wiring between the pin A/A1 of the relay (9HQ) and the pin A/11 of the diode module 1160VD

 - wiring between the pin A/A of the relay (8WC) and the pin A/26 of the diode module 1160VD

 - RELAY-HORN SPLY RESET (8WC)

 - wiring between the pin A/1 of the relay (8WC) and the first terminal block

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-26-00-710-003 Operational Check of Smoke Configuration Control
 Circuit
 AMM 23-42-21-000-001 Removal of the Mechanic Call Horn (15WC)
 AMM 23-42-21-400-001 Installation of the Mechanic Call Horn (15WC)
 ASM 21-26/00
 ASM 23-42/00

 3. Fault Confirmation
__________________
 A. Test
 (1) Do an operational test of the control circuit of the smoke configuration (Ref. AMM TASK 21-26-00-710-003).
 (a) Make sure that the mechanic call horn operates correctly.
 May 01/05R CES

 4. Fault Isolation
_______________

 A. If the mechanic call horn does not operate correctly: - on the VENTILATION section of the panel 22VU, release the EXTRACT and the BLOWER pushbutton switches
 - on the overhead control and indicating panel 21VU, push the CALLS/MECH pushbutton switch
 - make sure that the mechanic call horn operates correctly.
 (1) If the mechanic call horn does not operate correctly:
 - make sure that the CALLS/MECH pushbutton switch is pushed, and do a check for: . ground at the pin A/X2 of the horn supply relay (4WC) . ground at the pin (-) of the mechanic call horn (15WC) . 28VDC at the pin A/A1 of the horn supply relay (4WC) . 28VDC at the pin (+) of the mechanic call horn (15WC) (Ref. ASM 23-42/00).
 (a) If there is a ground signal and 28VDC:

 - replace the HORN-MECH CALL (15WC) (Ref. AMM TASK 23-42-21-000-001) and (Ref. AMM TASK 23-42-21-400-001).

 (b) If there is no ground signal and 28VDC:

 - repair the wiring between the relay (4WC) and the mechanic call horn (15WC).
 1 If the fault continues:
_
 - repair the wiring between the pin A/X2 of the relay (4WC) and the first terminal block.
 (2) If the mechanic call horn operates correctly:
 - do a check for ground at the pin A/D of the ENG2 oil low pressure and ground relay (12KS2) (Ref. ASM 21-26/00).
 (a) If there is no ground signal:
 - replace the diode module 1800VD.
 1 If the fault continues:
_
 - repair the wiring between the pin A/D of the relay (12KS2) and the pins A/28 and A/29 of the diode module 1800VD.
 (b) If there is a ground signal:
 - do a check for ground at the pin A/A2 of the horn control relay (9HQ) (Ref. ASM 21-26/00).
 1 If there is no ground signal:
_
 - do a check of the RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1) and the RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2)

 - replace them if necessary.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 279
 May 01/05R CES

 a If the fault continues:
_
 - repair the wiring between the pin A/8 of the relay (12KS2) and the pin A/D of the relay (12KS1).

 - If the fault continues:
 . repair the wiring between the pin A/8 of the relay
 (12KS1) and the pin A/A2 of the relay (9HQ).

 2 If there is a ground signal:
_
 - do a check for ground at the pin A/A of the horn supply-reset relay (8WC) (Ref. ASM 21-26/00) and (Ref. ASM 23-42/00).
 a If there is no ground signal:
_
 - replace the RELAY-HORN CONTROL (9HQ).

 - If the fault continues:
 . replace the diode module 1160VD.

 - If the fault continues:
 . repair the wiring between the pin A/A1 of the relay
 (9HQ) and the pin A/11 of the diode module 1160VD.

 - If the fault continues:
 . repair the wiring between the pin A/A of the relay
 (8WC) and the pin A/26 of the diode module 1160VD.

 b If there is a ground signal:
_
 - do a check for ground signal at the pin A/X2 of the relay (4WC) (Ref. ASM 23-42/00).

 - If there is no ground signal:
　
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