Sony PCS-1500 Service Manual page 184

4-2. Self-diagnostics Function
A-8
"Downloading is
OK" when judged from the
result of the
diagnostics?
YES
"DRAM Test
PASSED" when judged
from the result of the
diagnostics?
YES
V-2
m
. When an error occurs during the DRAM test of VCP, the DRAM may be defective, or the clock (27
MHz, V-Sync) of the video system may be not input correctly.
. When the application does not work even though the system has PASSED self-diagnostics, a trouble
may be existing inside the VCP. Replace the VCP (IC300).
4-54
NO (PutByte Timeout)
NO
The input video
signal (NTSC/PAL) including
the camera signal has
no error?
YES
IC300 [126] = 27 MHz?
YES
IC303, IC304, IC305, IC306
or their peripheral
NO
IC300 [35] = 3.3 V?
YES
NO
X300 = 40 MHz?
YES
IC300
NO
Check the input signal
NO
IC354, IC352 or their peripheral
IC110
Replace X300
PCS-1500/1500P