Marantz SR7013 Service Manual page 121

3-12. Error Code H1-12 failure detection procedure
Checking device. [IC202 : PCM9211]
Checking the reset waveform. (DIR)
Check item(3-12.1.). Checking the reset :
Check the CPU.
Is the waveform of the TP near the DIR [IC202] correct (like the one
shown in the diagram) when the power is turned on?
IC202
34 pin
YES NO
Check the reset circuit between CPU [IC151] and DIR [IC202].
If there is no problem, the DIR [IC202] is faulty.
Replace with a new device.
Recheck from check item (3.1.)
If it does not work, replace the PCB.
Check the communication line. (DIR)
Check item(3-12.2.).
Check the CPU.
Is the waveform of the TP near the DIR [IC202] correct (like the one
shown in the diagram) when the power is turned on?
IC151 IC151
Examples of confirmation waveform
Voltage scale : 1.0V/div
Time scale : 20ms/div
YES
DIR [IC202] is faulty.
Replace with a new device.
Recheck from
If it does not work, replace the PCB.
121
YES
Check the communication line :
DR_CK:CLK
DR_DIN:MOSI
DR_CE:CS
DR_DOUT:MISO
NO
Check item(3-12.3.). Check the communication line :
Check DIR [IC202], CPU[IC151] patterns as well as soldering.
If there is no problem, go to the next step.
check item (3.1.)
*The diagram shows an example.
(Signal patterns vary depending on the tim-
ing.)
Points for checking waveforms
- Crest value (3.3V normally)
- Signal change
- CLOCK frequency (about 2MHz)
Voltage scale : 2.0V/div
Time scale : 2us/div