Service manual

5-2-1. sys
In the FlashROM and SDRAM program section, operation is normal if the
test program starts.
Checks the SDRAM coefficient buffer range, backup RAM (SRAM) and
battery.
5-2-2. led
The LEDs will come on in the sequence shown below. Visually check that
they come on as indicated.
5-2-3. drive
Checks the internal Card, CD-ROM Drive, PCMCIA Slot
Insert the CD-ROM disk included in the package for the product in the CD-
ROM drive.
Insert the PC ATA card for inspection into the PCMCIA slot.
A: Internal CF Card, B: If both of the CD-ROM drives are NG, remove
the FPC cable for CN109 and CN110. and reinspect the internal CF card.
5-2-4. dsp6
Checks the DSP6 and DRAM.
If all the items are NG, check the system clock (60 MHz).: X104
If all of the DRAM items are NG, check 128Fs, Sync.: IC165
5-2-5. cnv
Checks the CNV circuit boards.
Since DSP6 is used for inspecting Data1and Coef, make sure that the DSP6
has passed its test before proceeding.
5-2-6. aes
Checks AES/EBU IN/OUT
5-2-7. my8
Checks the miniYGDAI slot.
Automatically identifies the MY cards in the slot. If the cards are MY-8AE,
MY8-AT, MY8-TD, the following checks are performed. Only card
identification is performed for all other cards. There is a need to loop back
MY-8AE, MY8-AT, MY8-TD cards.
INPUT1/2 Hot - OUTPUT1/2 Hot
INPUT1/2 Cold - OUTPUT1/2 Cold
INPUT3/4 Hot - OUTPUT3/4 Hot
INPUT3/4 Cold - OUTPUT3/4 Cold
INPUT5/6 Hot - OUTPUT5/6 Hot
INPUT5/6 Cold - OUTPUT5/6 Cold
INPUT7/8 Hot - OUTPUT7/8 Hot
INPUT7/8 Cold - OUTPUT7/8 Cold
1 - 5
14 - 18
2 - 6
15 - 19
3 - 7
16 - 20
4 - 8
17 - 21
10, 12, 13, 21, 22, 23, 24, 25 GND
9, 11 OPEN
MY8-AE
13 1
14
25
Inspection items
SDRAM (Data Bus)
SDRAM (Addr Bus)
Backup RAM (Data Bus)
Backup RAM (Addr Bus)
Battery
Check these areas if NG
SDRAM (IC111, IC112), IC110
SDRAM (IC111, IC112), IC110
SRAM (IC108, IC109)
SRAM (IC108, IC109)
BT101, IC103
Inspection items
All LEDs
Each LED
All LEDs Blink
Notes
All LEDs come on for 1 second.
The LEDs come on one at a time in 0.3 second
intervals. The sequence for the LEDs to come on is
shown in the figure below. Two cycles are performed.
All LEDs blink for 3 seconds.
Inspection items
A: Internal CF Card
B: CD-ROM Drive
C: PCMCIA Slot
Check these areas if NG
CF101, IC113, IC117, IC123, IC137, IC138
CD-ROM circuit board, CD-ROM Drive, CN109,
CN110, IC113, IC117, IC123, IC137, IC138
PCMM circuit board, IC117, IC121, IC127, IC128,
IC129, IC130, IC132, IC135, IC136, IC139
Inspection items
CPU Interface (Data Bus)
CPU Interface (Data Bus)
CPU Interface (CS, TXB)
CPU Interface (Addr Bus)
Check these areas if NG
[oX] IC159
[Xo] IC143
[XX] IC113, IC177, IC178, IC143, IC159
[oX] IC159
[Xo] IC143
[XX] IC113, IC169
[oX] IC159
[Xo] IC143
[XX] IC113, IC179
[oX] IC159
[Xo] IC143
[XX] IC113, IC179
Inspection items
CPU Interface (BWR/BRR)
DRAM Interface (Data Bus)
DRAM Interface (Addr Bus)
DRAM Interface (MPR)
PIO Connection
Check these areas if NG
[oX] IC159
[Xo] IC143
[XX] IC153, IC154, IC159
[oX] IC153, IC154, IC159
[Xo] IC140, IC141, IC143
[oX] IC153, IC154, IC159
[Xo] IC140, IC141, IC143
[oX] IC159
[Xo] IC143
IC159, IC143
Inspection items
CPU Interface (Data Bus)
CPU Interface (Addr Bus)
CPU Interface (IRQ)
Data1 (Pulse <- Rand)
Coef2 (Linear <- Pulse)
Check these areas if NG
IC160, IC161, IC162, IC163, IC170, IC171
IC164, IC170, IC171
IC301
IC168, IC170
IC168, IC170
Inspection items
DIR5-1 Micon Interface
DIR5-1 Lock
DIT2-1 -> DIR5-1 Subcode
DIT2-1 -> DIR5-1 Signal
DIR5-2 Micon Interface
DIR5-1 Lock
DIT2-2 -> DIR5-2 Subcode
DIT2-2 -> DIR5-2 Signal
Check these areas if NG
IC113, IC145, IC146, IC150, IC156,
IC157, IC158,IC162
IC142, IC150
IC113, IC142, IC148, IC157, IC158, IC162
IC142, IC148
IC113, IC145, IC146, IC151, IC156,
IC157, IC158, IC162
IC142, IC151
IC113, IC142, IC149, IC157, IC158, IC162
IC142, IC149
Inspection items
Card Detect
Status (Lock/Hold)
Audio Line
Check these areas if NG
IC113, IC155, IC157, IC158
IC160, IC165, IC167
IC166, IC172
SREV1
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