Yamaha DME24N, Руководство по обслуживанию

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DME24N/DME64N
(2) Display Screen at NG
Scroll display at NG is the same as in “1-4. DSP6” and
“1-5. DM DSP7”.
1-7. DM ATSC2 Test
1-8. CA ATSC2 Test
Content: Writes, reads, and displays each register of
ATSC2.
Checking targets are as follows for specific sheets and
models.
LCD screen
Fig. 19. CA DSP7 Test Screen (2)
Fig. 20. DM ATSC2 Test Screen
Detailed contents at NG are as follows:
· NG register name "MODE REG.NG"
· NG address W/R data "adrs: 0x00 W:0x00 R:0x0F
When the results are not displayed in one screen, the
display scrolls. Use the encoder to scroll the test results
and check for normality.
When NG, a register name and its port address where
NG was detected first are displayed along with the W/
R data contents.
1-9. MIDI Test
Content: Transmits and receives data "DDh, 33h, 55h
and CCh" from MIDI OUT → MIDI IN at 31.25 Kbps
and checks for identity.
Connect MIDI OUT and the MIDI IN connectors of the
main unit with a general-purpose MIDI cable.
LCD Screen
Messages
· Data disagreement error: NG: DATA ERROR.!
1-10. RS 232C/422 Test
Content: Loops back the COM terminal, transmits and
receives data "DDh, 33h, 55h and CCh", and checks
for identity. The test is performed continuously in the
order of RS232C
→ RS422.
Setup: Connect a RS232C connector test jig (for loop
back) with the COM terminal of the main unit.
LCD screen
Fig. 21. MIDI Test Screen
Fig. 22. RS232C/422 Test Screens
Circuit
Board
DSP
CA
ATSC2No.
ATSC2#1 (IC202)
ATSC2#2 (IC203)
ATSC2#3 (IC302)
ATSC2#4 (IC303) ○
−
○
○
ATSC2#1 (IC404)
ATSC2#2 (IC405)
ATSC2#3 (IC502) −
−
−
○
○
○
○
○
○
○
DME24N DME64N
DSP ATSC2 #1 : OK!
DSP ATSC2 #2 : OK!
DSP ATSC2 #3 : OK!
DSP ATSC2 #4 : OK!
CA ATSC2 #1 : NG!
MODE REG. NG
adrs: 0x00 W: 0x00 R:0x0F
CA ATSC2 #2 : NG!
OUT TDIF CH STS REG. NG
adrs: 0xA8 W: 0x20 R:0x0F
EXIT: [ENTER]
∗∗∗
07.
∗∗∗
DM ATSC2
∗∗∗
07.
∗∗∗
DM ATSC2
Indicated in case of O.K.
Indicated in case of NG.
OK !
NG: DATA ERROR. !
EXIT: [CANCEL]
∗∗∗
09.
∗∗∗
MIDI
Indicated in case of O.K.
Indicated in case of NG.
RS232 OK !
RS422 OK !
NG: RS232 DATA ERROR !
NG: RS422 DATA ERROR !
EXIT: [ENTER]
∗∗∗
10.
∗∗∗
RS232/422
Indicated in case of O.K.
Indicated in case of NG.
∗∗∗
06.
∗∗∗
＞
[DIAGNOSTICS FOR DSP7]
DSP7-7
X X X X X X X X X X X X X X X X
X :
O :
CA DSP7
CPU I/F (DATA BUS)...NG !
＞
DSP7-7
X X X X X X X O
CPU I/F (ADR BUS)...NG !
＞ CPU I/F (CHIP SEL)...NG !
abnormal bit
normal Bit