Pllp2 Test; Sram Test; Battery Test - Yamaha DME24N Service Manual
Digital mixing engine
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Also See for DME24N:
- Manual del instrucción (80 pages) ,
- Owner's manual supplement (8 pages) ,
- Owner's manual (482 pages)
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DME24N/DME64N
In a multiple test pattern, when the [ENTER] key is
pressed after completion of all other patterns (regardless
of OK/NG display), it will return to the Testing Item
Selection List Screen. If the [ENTER] key is pressed
when any pattern remains untested, it will return to the
selection setting screen before execution of the test.
1-1. PLLP2 Test
Content: Compares and checks registers (00h, 0Fh,
10h, 16h) of the master and slave PLLP2 by writing
and reading them.
LCD screen
∗∗∗
01.
PLLP2
Mst.
0x00
W/R OK !
Mst.
0x0F
W/R OK !
Mst.
0x10
W/R OK !
Mst.
0x16
W:0x0F
R:0x00
S l v.
0x00
W/R OK !
S l v.
0x0F
W/R OK !
S l v.
0x10
W/R OK !
Fig. 12. PLLP2 Test Screen
Checking of All Output Results
The results of comparison checking are scroll-
displayed by encoder and checked for normality.
1-2. BATTERY Test
Content: Measures and automatically checks the
backup battery voltage with A/D. The measured battery
voltage is displayed.
LCD screen
∗∗∗
02.
BATTERY
VOLTAGE: 3.05 [V]
OK.
VOLTAGE: 2.05 [V]
NG. BATTERY LOWER ERROR!
Fig. 13. BATTERY Test Screen
Messages
· At battery overvoltage: NG: BATTERY OVER ERROR!
· At shortage of battery voltage:
· At lower battery voltage:
104
Indicated in case of O.K.
∗∗∗
Indicated in case of NG.
Indicated in case of O.K.
∗∗∗
EXIT: [ENTER]
Indicated in case of NG.
NG: BATTERY EMPTY ERROR!
NG: BATTERY LOWER ERROR!
Applicable Range of Measured Voltage
· Acceptable voltage range
· Overvoltage
· Low voltage
· Voltage shortage
1-3. SRAM Test
Content: Checks Address Bus and Data Bus of SRAM.
LCD screen
∗∗∗
03.
SRAM
SRAM AssressBus OK!
SRAM DataBus
OK!
EXIT: [CANCEL]
∗∗∗
SRAM
03.
SRAM AssressBus NG!
SRAM DataBus
NG!
EXIT: [CANCEL]
Fig. 14. SRAM Test Screen
Messages
· When address bus access abnormality is detected:
· When data bus access abnormality is detected:
2.80 [V] -3.50 [V]
3.51 [V] or above
2.79 [V] -0.51 [V]
0.5 [V] or below
∗∗∗
Indicated in case of O.K.
∗∗∗
Indicated in case of NG.
NG: SRAM AddressBus NG.!
NG: SRAM DataBus NG.!
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