Yamaha AD8HR Service Manual page 37

These are results of checks of SRAM (IC010 and IC011) and CPU connections.
The first line shows the D15,D14 ..., D1,D0 status from the left for the data bus.
The second line shows the A15,A14...,A2,A1 (seen from CPU) status from the left for the address bus.
In all cases, correct locations are shown with an O. Error locations are shown with an X.
[2] FLASH MEMORY (IC013)
This is displayed when W/R check results of the FLASH MEMORY (IC013) were a failure.
[3] BATTERY
This appears when the voltage of the backup battery is wrong (below 3 volts or above 3.5 volts). This is also
displayed during service test when below 2.5 volts or above 3.5 volts.
[4] PLLP2 (IC052)
This appears when results of the PLLP2 (IC052) and CPU connection check were NG (failure).
[5] PLL (IC058, IC059) BNC OUT ->BNC IN
This appears when results of the PLL (IC058 and IC059) check were NG (failure).
This is also displayed when the repeating BNC OUT-> IN loop-back check was NG (failure).
[6] ATSC2 (IC921)
This appears when the ATSC2 (IC921) and CPU connection check results were NG (failure).
[7] DSP7 (IC902) Data Bus
DSP7 (IC902) Chip Select
DSP7 (IC902) Address Bus
DSP7 (IC902) SO [24] -> ATSC2 (IC921) PI [A0]
DSP7 (IC902) SO [25] -> ATSC2 (IC921) PI [A1]
DSP7 (IC902) SO [26] -> ATSC2 (IC921) PI [A2]
DSP7 (IC902) SO [27] -> ATSC2 (IC921) PI [A3]
DSP7 (IC902) SO [32] -> ATSC2 (IC921) PI [C0]
DSP7 (IC902) SO [33] -> ATSC2 (IC921) PI [C1]
DSP7 (IC902) SO [34] -> ATSC2 (IC921) PI [C2]
DSP7 (IC902) SO [35] -> ATSC2 (IC921) PI [C3]
This appears when the DSP7 (IC0902) connection check results were NG (failure). OK (pass) items are not
displayed.
The first line shows the D15,D14 ..., D1,D0 status from the left for the data bus.
The third line shows the A7,A6...,A2,A1 (seen from CPU) status from the left for the address bus.
In all cases, correct locations are shown with an O. Error locations are shown with an X.
The second line is displayed when the Chip Select is NG (failure).
The 4th to 11th lines are displayed when the SO->ATSC2 PI connection check for DSP7 (IC902) was NG (fail).
[8] DIT A (IC903)
This appears when the DIT A (IC903) and CPU connection check results were NG (failure).
[9] DIT B (IC924)
This appears when the DIT B (IC924) and CPU connection check results were NG (failure).
[10] DIR (IC929)
DIR (IC929) DIGITAL OUT A
The first line appears when the DIR (IC929) and CPU connection check results were NG (failure).
The second line appears when the repeating check results for DIGITAL OUT-> IN was NG (failure).
OOOO OOOO OOOO OOXX
OOOO OX X
AD8HR
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