- repair the above wiring.

 (b) If there is continuity:

 - do a check and repair the wiring of the annunciator light test and interface board (4LP) from pin A/37 to the first terminal block (Ref. ASM 34-48/01).

 (2) If the G/S legend of the CAPT GPWS/G/S pushbutton switch only does not come on:

 - replace the P/BSW - GPWS/G/S (5WZ) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002).
 (a) If the fault continues:
 - do a check and repair the wiring of the CAPT GPWS/G/S pushbutton switch (5WZ) : . pin A/4 to the first terminal block . pin A/9 to pin A/5
 「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 ∞∞34-48-00∞∞∞∞∞∞∞∞∞∞Page 228
 Aug 01/05 CES . pin A/8 to F/O GPWS/G/S pushbutton switch (4WZ) pin A/6 (Ref. ASM 34-48/01).

 (3) If the G/S legend of the F/O GPWS/G/S pushbutton switch only does not come on:

 - replace the P/BSW - GPWS/G/S (4WZ) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002).
 (a) If the fault continues:
 - do a check and repair the wiring of the F/O GPWS/G/S pushbutton switch (4WZ) from pin A/4 to the first terminal block (Ref. ASM 34-48/01).

 (4) If the two G/S legends come on:

 - replace the GPWC (1WZ) (Ref. AMM TASK 34-48-34-000-001) and (Ref. AMM TASK 34-48-34-400-001).
 (a) If the fault continues:
 - replace the BOARD-ANN LT TEST & INTFC (4LP) (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).
 1 If the fault continues:
_
 - do a check of the wiring of the annunciator light test and interface board (4LP): . pin A/38 to GPWC (1WZ) pin AB/3D . pin A/40 to pin A/20 . pin A/21 to the circuit breaker 2WZ (Ref. ASM 34-48/01).
 a If there is no continuity:
_ - repair the above wiring.
 b If there is continuity:
_
 - replace the C/B - EIS/GPWS/28VDC (2WZ).
R **ON A/C 106-149, 215-299, 301-399, 401-499,
 A. If the GPWS legend of one or two PULL UP/GPWS pushbutton switches does not come on: - on the panel 25VU, set the INT LT/ANN LT switch to TEST and do a check
 to see if the GPWS legends come on.
 (1) If the two GPWS legends do not come on:
 - do a check of the wiring of the F/O PULL UP/GPWS pushbutton switch (4WZ): . pin A/8 to the first terminal block . pin A/9 to pin A/5 (Ref. ASM 34-48/01).
 (a) If there is no continuity:
 - repair the above wiring.
 「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 ∞∞34-48-00∞∞∞∞∞∞∞∞∞∞Page 229
 Aug 01/05 CES (b) If there is continuity:

 - do a check and repair the wiring of the annunciator light test and interface board (4LP) from pin A/37 to the first terminal block (Ref. ASM 34-48/01).
 (2) If the GPWS legend of the CAPT PULL UP/GPWS pushbutton switch only does not come on:

 - replace the P/BSW - PULL UP/GPWS (5WZ) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002).
 (a) If the fault continues:
 - do a check and repair the wiring of the CAPT PULL UP/GPWS pushbutton switch (5WZ) : . pin A/4 to the first terminal block . pin A/9 to pin A/5 . pin A/8 to F/O PULL UP/GPWS pushbutton switch (4WZ) pin A/6 (Ref. ASM 34-48/01).

 (3) If the GPWS legend of the F/O PULL UP/GPWS pushbutton switch only does not come on:

 - replace the P/BSW - PULL UP/GPWS (4WZ) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002).
 (a) If the fault continues:
 - do a check and repair the wiring of the F/O PULL UP/GPWS pushbutton switch (4WZ) from pin A/4 to the first terminal block (Ref. ASM 34-48/01).

 (4) If the two GPWS legends come on:

 - replace the GPWC (1WZ) (Ref. AMM TASK 34-48-34-000-001) and (Ref. AMM TASK 34-48-34-400-001).
 (a) If the fault continues:
 - replace the BOARD-ANN LT TEST & INTFC (4LP) (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).
 1_ If the fault continues:
 - do a check of the wiring of the annunciator light test and
 interface board (4LP):
 . pin A/38 to GPWC (1WZ) pin AB/3D
 . pin A/40 to pin A/20
 . pin A/21 to the circuit breaker 2WZ
 (Ref. ASM 34-48/01).

 a If there is no continuity:
_
 - repair the above wiring. b If there is continuity:
_ - replace the C/B - EIS/GPWS/28VDC (2WZ).

R **ON A/C ALL
 B. Do the test given in Para. 3.
 5. Close-up
　
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