Gpi Test; Result Display Screen - Yamaha DME24N Service Manual

Messages
· When asynchronous internal word clock is detected:
NG: INTERNAL UNSYNC ERROR
· When asynchronous external word clock is detected:
NG: EXTERNAL UNSYNC ERROR
· When slot initialization error is detected due to
selection of external word clock MY-SLOT1-4 (EXT2-
EXT4): NG: MY-SLOT INITIAL ERROR
· When unlock is detected:
(Note1) The details of external input word clock selection
display are as follows.
Display External input word clock
EXT1 BNC
EXT2 MY-SLOT1
EXT3 MY-SLOT2
EXT4 MY-SLOT3
EXT5 MY-SLOT4
EXT6 CASCADE IN
EXT7 CASCADE OUT

1-14. GPI Test

Content: The GPI output and the GPI input are loop
back connected via a special-purpose test jig, and the
GPI input voltage is measured to automatically check
for normality. The GPI output has two voltages, namely
L/H. The test result shows the L/H voltages for all
channels. DME64 shows the L/H voltages for 16
channels, while DME24 shows for 8 channels.
Executing Screen
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14. GPI
GPI Loopback Testing...
Fig. 33. GPI Test Screen (1)
NG: UNLOCK ERROR
Selecting Condition
Cannot select on DME24N.
Cannot select on DME24N.
Cannot select on DME24N.
Cannot select on DME24N.
Cannot select on DME24N.
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Result Display Screen

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14. GPI
CH No. Lo [V] Hi [V]
CH1 1.200 3.140
CH2 1.200 3.140
CH3 1.201 3.139
CH4 1.205 3.141
CH5 1.203 3.140
CH12 1.200 3.140
CH13 1.200 3.140
CH14 1.201 3.139
CH15 1.205 3.141
CH16 1.203 3.140
GPI OK!
EXIT: [ENTER]
CH12 1.200 3.140
CH13 1.200 3.140
CH14 1.201 3.139
CH15 1.205 3.141
CH16 1.203 3.140
NG: GPI CH ERROR!
EXIT: [ENTER]
Fig. 34. GPI Test Screen (2)
Using an encoder, the result display screen is scrolled.
DME24N/DME64N
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Scroll Display
Indicated in case of O.K.
Indicated in case of NG.
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