Diagnosis; Power On Sequence - Pioneer BDP-51FD Service Manual

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5. DIAGNOSIS

5.1 POWER ON SEQUENCE

A
[1] Power On Sequence
Pressing of the POWER key is detected by the IC4001 Submicrocomputer on the MAIN Assy.
The IC4001 then outputs a POWER_ON signal to the SYPS Assy.
After receiving the POWER_ON signal, the SYPS Assy activates, secondary
Power[SW+12 V], setting it to ON.
B
The R8A34019BG (IC1001), the core LSI, starts up. {RS-232C connectorCN1601,
log it to ON}
Communication between the R8A34019BG and the DDR2 SDRAM starts.
C
Communication between the R8A34019BG and the FLASH_IC starts.
It takes about 1 minute to complete the startup process.
[2] Troubleshooting
D
Are the pins at CN7001 and CN7002 supplied with voltages?
MAIN ASSY(1/10) V+3S, V+3PLL with 3.3 voltages?
MAIN ASSY(1/10) V+1R8S with 1.8 voltages?
MAIN ASSY(1/10) V+1R1S with 1.1 voltages?
Is the reset signal H? (R1161)
Is the 27 MHz CLK oscillating? (R1141)
Power ON, and log of R8A34019BG stops with [DRAM failed].
E
R8A34019BG and communication failure of DDR memory.
Power ON, and log of R8A34019BG stops with [zboot failed].
R8A34019BG and communication failure of FLASH memory.
F
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