Sony PCS-G70N Service Manual page 60

No.28
VIA1 (IC2102/DSP-113) - SDRAM
Check the power supply No
Is FB2102/DSP-113
+3.3 V (±10%)?
Yes
Check the clock No
Is pin 68 of IC2102/DSP-113
54 MHz?
Yes
Check the
IC2102/DSP-113,
or the peripheral circuit.
No.30
Graphics (IC601/CPU-382) - SDRAM
No
Check the power supply
Are FB603, FB606/CPU-382
+3.3 V (±10%)?
Yes
Check the clock
No
Is pin 2 of IC506/CPU-382
27 MHz?
Yes
No
Check the clock
Is R617/CPU-382
108 MHz?
Yes
Check the
IC602, IC603/CPU-382,
or the peripheral circuit.
4-22 (E)
VIA2 (IC2202/DSP-113) - SDRAM
Check the
IC2401/DSP-113,
or the peripheral circuit.
Check the IC2101, IC101,
X101/DSP-113,
or the peripheral circuit.
VOA (IC801/CPU-382) - SDRAM
Check the IC302/PS-686,
or the peripheral circuit.
Check the followings
. IC506/CPU-382,
or the peripheral circuit
. IC102, IC103,
X101/DSP-113,
or the peripheral circuit
Check the IC601, IC602,
IC603/CPU-382,
or the peripheral circuit.
No.29
Check the power supply No
Is FB2202/DSP-113
+3.3 V (±10%)?
Yes
Check the clock No
Is pin 68 of IC2202/DSP-113
54 MHz?
Yes
Check the
IC2202/DSP-113,
or the peripheral circuit.
No.31
Check the power supply No
Is FB802/CPU-382
+3.3 V (±10%)?
Yes
No
Check the clock
Is pin 19 of IC506/CPU-382
27 MHz?
Yes
No
Check the clock
Is R804/CPU-382
81 MHz?
Yes
Check the
IC802/CPU-382,
or the peripheral circuit.
Check the
IC2401/DSP-113,
or the peripheral circuit.
Check the IC2201, IC101,
X101/DSP-113,
or the peripheral circuit.
Check the IC302/PS-686,
or the peripheral circuit.
Check the followings
. IC506/CPU-382,
or the peripheral circuit
. IC102, IC103,
X101/DSP-113,
or the peripheral circuit
Check the
IC801, IC802/CPU-382,
or the peripheral circuit.
PCS-G70N/G70NP/G70NP2
PCS-G70S/G70SP