—5 Power defect of
CH1-4 ADC (IC4701)
and
CH5-6 ADC (IC4801)
Step Cause Diagnostics Point Item to be Checked Corrective Action Reference
Check the following voltages at the
diagnostics point.
[
The communication between
MAIN CPU/DSP and MASTER/BOOTH DAC]
R2118 (3.3 V amplitude)
R2119 (3.3 V amplitude)
MAIN Assy
R2118 (66Ak_DAC_SCL)
R2119 (66AK_DAC_SDA)
2-1-4-4
—4 !
If an output signal can be confirmed, replace
MAIN Assy.
! If not, the circuit or the parts between IC1101
and IC2101 may be defective.
If the parts other than IC1101 are defective,
replace its. If IC1101 is defective, replace
MAIN Assy.
I2C communication
error of
MASTER/BOOTH
DAC (IC2101)
2-1-4-5
AIN Assy
TP V+3R3A
Check the following voltages at the
diagnostics point.
[Power supply of CH1-4 ADC and CH5-6 ADC]
V+3R3A (3.3 V)
! If the voltage is confirmed correctly, go to step 6.
! If not, the circuit or the parts around IC4008
may be defective. Replace its.
* The error of V+5A is able to detect at the
voltage monitoring circuit on the MAIN Assy.
—7
I2C communication
error of
CH1-4 ADC (IC4701)
and
CH5-6 ADC (IC4801)
2-1-4-7
AIN Assy
R4708, R4808 (SCL)
R4709, R4809 (SDA)
Check the following voltages at the
diagnostics point.
[The I2C communication between
MAIN CPU/DSP and CH1-4 ADC/CH5-6 ADC]
R4708, R4808 (3.3 V amplitude)
R4709, R4809 (3.3 V amplitude)
!
If an output signal can be confirmed, replace
MAIN Assy.
! If not, perform a crosscheck of AIN Assy and
MAIN Assy.
If the problem is caused by the MAIN Assy,
the circuit or the parts between IC1101 and CN2
may be defective. If
AIN Assy, between
CN4001
and IC4701, CN4001 and IC4801 may be defective.
If the parts other than IC1101 are defective,
replace its. If IC1101 is defective, replace
MAIN Assy.
—6 RST defect of
CH1-4 ADC (IC4701)
and
CH5-6 ADC (IC4801)
2-1-4-6
AIN Assy
TP XRST
Check the following voltages at the
diagnostics point.
[RST of CH1-4 ADC and CH5-6 ADC]
XRST (3.3 V)
! If the voltage is 3.3 V, replace MAIN Assy.
! If 0 V, perform a crosscheck of AIN Assy and
MAIN Assy.
If the problem is caused by the MAIN Assy,
the circuit or the parts between IC1101,
IC1503
and CN2 may be defective. If AIN Assy,
the circuit or the parts between CN4001, IC4701,
IC4801, IC4902, IC5002, IC5102 and IC5203
may be defective.
If the parts other than IC1101
are defective,
replace its. If IC1101 is defective, replace
MAIN Assy.
——1 Other defects — Replace MAIN Assy.
[2-1-6] "E-0020" is displayed
[2-1-5] "E-0010" is displayed
A setting error of DIT was generated.
Step Cause Diagnostics Point Item to be Checked Corrective Action Reference
——1 Other defects — Replace MAIN Assy.
A setting error of DIR was generated.
Step Cause Diagnostics Point Item to be Checked Corrective Action Reference
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