Yamaha DME24N, Service Manual

Page: 111 / 289

DME24N/DME64N
111
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: NG: UNLOCK ERROR
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
∗∗∗
14.
∗∗∗
GPI
GPI Loopback Testing...
Fig. 33. GPI Test Screen (1)
Result Display Screen
Using an encoder, the result display screen is scrolled.
Fig. 34. GPI Test Screen (2)
Cannot select on DME24N.
Cannot select on DME24N.
Cannot select on DME24N.
Cannot select on DME24N.
Cannot select on DME24N.
EXT2
EXT1
EXT3
EXT4
EXT5
EXT6
EXT7
MY-SLOT1
BNC
MY-SLOT2
MY-SLOT3
MY-SLOT4
CASCADE IN
CASCADE OUT
Selecting Condition Display
The details of external input word clock selection
display are as follows. (Note1)
External input word clock
∗∗∗
14.
∗∗∗
GPI
CH No.
GPI OK!
CH1
CH2
CH3
CH4
CH5 1.200
1.200
1.201
1.205
1.203 3.140
3.140
3.139
3.141
3.140
Lo [V] Hi [V]
CH12
CH13
CH14
CH15
CH16 1.200
1.200
1.201
1.205
1.203 3.140
3.140
3.139
3.141
3.140
EXIT: [ENTER]
NG: GPI CH ERROR!
CH12
CH13
CH14
CH15
CH16 1.200
1.200
1.201
1.205
1.203 3.140
3.140
3.139
3.141
3.140
EXIT: [ENTER]
Indicated in case of O.K.
Indicated in case of NG.
Scroll Display