Panasonic KX FLB758RU User Manual

7.1.2. CONNECTION DIAGRAM (2)
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7.1.3. POWER SUPPLY FLOW
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7.2. GENERAL BLOCK DIAGRAM
The followin g is an outline of each device IC on the digital board.
 1. ASIC (IC604) Composed mainly of an address decode r and a modem control.
Controls the general FAX operations.
Performs the image processing.
CPU and Real time clock
Provides the reset pulse for each of the major ICs.
 2. G/A (IC610) Controls the operation panel I/F.
Controls the LSU I/F.
Latches lower address.
Controls FANs, LEDs and analog I/F.
 3. Flash ROM (IC606) Contain s all of the program...

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7.3. FACSIMILE SECTION
7.3.1. DIGITAL SECTION
7.3.1.1. DIGITAL BLOCK DIAGRAM
CN614TOHVPS
CN615TOSMPS
CN613TOLASER
CN612TOPOLYGON
CN611
TO OPE
TOPARALLEL
IC610 IC604
G/A
MFC2000
IC606
IC608
FLASH
SDRAM
SDRAMIC603
CN600
CN607
TOUSB
CN601
TO
MOTOR
(CIS)
CN602
TO
MOTOR
(ADF)
TOMOTOR
(ENGIN)
CN605CN608
TO
FB
CN608
TO 
THERMISTOR
TO FAN
CN609
TO SOLENOID
IC609
CODEC
TO ANALOG CN616
CN606
DEV,CHG,TRS,SENCTL1
DRUM,TOPCVR,REGIST+24V,+5V
HTRON
XHSYNC
LDON,APC,VIDEOXREADY
POLON,POLCLK
KSTART,KLATCH,KSCLK,KTXD...

7.3.1.2. ASIC (IC604)
This IC is used for general FAX operations.
(1)CPU:This model uses ARM equivalent CPU operating at 40 MHz.
Many of the peripheral functions are handled by custom designed LSIs.
As a result, the CPU only needs to process the results.
(2)RTC:Real time clock.
(3)DECORDER:Decords the address.
(4)ROM/RAM I/F:Controls the SELECT signal of ROM or RAM and bank switching.
(5)ANALOG UNIT:Sends beep tones, etc.
7.3.1.3. ROM (IC606)
This 2MB FLASH ROM has 31 blocks.
The capacity of each block...

7.3.2. RTC BACKUP CIRCUIT
 1. Function
This unit has a lithium battery (BAT60 0) which works for the Real Time Clock IC (RTC: inside IC604).
The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.
 2.  RTC Inside (IC604) Backup Circuit Operation
W hen the power switch is turned ON, power is supplie d to the RTC (inside IC604). At this time, the voltage at pin F17 of the
IC604 is +3.3V. W hen the power switch is turned OFF, the BAT60 0 supplie s power to RTC through...

7.3.3. MODEM CIRCUIT OPERATION
The CODEC (IC609) and ASIC (IC604) has all the hardware satisfyi ng the CCITT standards mentioned previously.
ASIC (IC604) controlled codec (IC609) by senial data.
This CODEC (IC609) and ASIC (IC604) has an automatic applica tion equalizer. W ith training signal 1 or 2 at the time of G3
reception, it can automatically establish the optimum equalizer.
 1. Facsimile Transmission/DTMF Line Send
The digital image data on the data bus is modulated in ASIC(IC604), and sent from...

7.3.4. RESET
RESET signalThe System Reset signal (RESETn) comes from the IC 604-K18pin, ´H ´level (3.3V) in normal times, while ´L ´ (0V) at reset.
A built-in reset circuit inside IC 604 triggers a reset when the +5V power line voltage drop below 4.3V,or the 3.3V power line
voltage drop below 2.9V.
What to do when the system does not start up after the power is turned ON.
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7.3.5. ANALOG SECTION
7.3.5.1. ANALOG GATE ARRAY (IC201 on the Digital Board))
This IC can perform signal route switching and level adjustments for various types of analog signals.
This IC incorporates a cross-point switch (CPS), an electronic volume.
The CPS of this IC is controlled by sending data from digital ASIC.
Explanation of ANALOG GATE ARRAY (IC201 on the DIGITAL Board)
No.NameFunctionNo.NameFunction
1STRStrobe input19NCNot used
2CLOCKClock input20EXTINExt amp output
3DATAData input21EXTOUTExt...