Pioneer FX-MG9107ZT/UC Service Manual page 46

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QQ
3 7 63 1515 0
CH1 : 6 TE
CH2 : 8 TIN
CH3 : * CIN
A
CH4 : 4 EC
During inside/outside search
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*note
RAM memory usage monitoring function
The memory usage within the RAM can be monitored by tracking the voltage levels at the test points,
RAM0,RAM1,RAM2, on the PCB.
C
Divide the total volume of the RAM by 7, and express the memory usage in 3 bits (3 binary digits),
RAM0,RAM1,RAM2. The RAM0 indicates the least significant bit. If then the combination of the voltage levels
measured at the RAM0,RAM1,RAM2 is converted to an octal number, X (Oct), the memory usage within the RAM
should be expressed by "X (Oct) / 7".
It is also possible to measure the memory usage within the RAM in voltage (appx 5V at max),
TE
L 13942296513
by adding the R/2R ladder resistance circuit detailed in the diagram on the right.
D
2R
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Mode:Test
R R
2R 2R 2R
RAM0 RAM1 RAM2
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FX-MG9107ZT/UC
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http://www.xiaoyu163.com
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CH1 : 1 FIN
CH3 : $ EC
CH3 : @ FG
DISC stop
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3 6 7
Point
Vmemo
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4
2 9 9 4
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Mode:Test
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2 8
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