Panasonic KX-FP158RU-B / KX-FP158RU-W Service Manual ▷ View online
4.3.
FLAT PACKAGE IC INSTALLATION PROCEDURE
1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins.
*Check the accuracy of the IC setting with the corresponding soldering
foil.
foil.
2. Apply flux to all pins of the FLAT PACKAGE IC.
3. Solder the pins, sliding the soldering iron in the direction of the arrow.
4.4. BRIDGE MODIFICATION PROCEDURE
1. Lightly resolder the bridged portion.
2. Remove the remaining solder along the pins using a soldering iron as shown in the figure below.
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KX-FP158RU-B / KX-FP158RU-W
5 CIRCUIT OPERATIONS
5.1. CONNECTION DIAGRAM
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5.2. GENERAL BLOCK DIAGRAM
The following is an outline of each device IC on the digital board. (Refer to GENERAL BLOCK DIAGRAM(P.128).).
1. ASIC (IC501)
Composed mainly of an address decoder and a modem control.
Controls the general FAX operations.
Controls the operation panel I/F.
Controls the thermal head I/F and CIS I/F.
Performs the image processing.
CPU and Real time clock
Provides the reset pulse for each of the major ICs.
2. ROM (IC502)
Contains all of the program instructions on the unit operations.
3. Static RAM (IC504)
This memory is used mainly for the parameter working in the storage area.
4. Dynamic RAM (IC503)
This memory is used mainly for the parameter working in the storage area.
5. MODEM (IC505)
Performs the modulation and the demodulation for FAX communication.
6. Read Section
CIS image sensor to read transmitted documents.
7. Motor Driver (IC508)
Drives the transmission motor and the reception motor.
8. Thermal Head
Contains heat-emitting elements for dot matrix image printing.
9. Analog Board
Composed of ITS circuit and NCU circuit.
10. Sensor Section
Composed of a cover open and film end switch, a document set switch, a document top switch, a paper top sensor and a motor
position switch.
position switch.
11. Power Supply Board Switching Section
Supplies +5V and +24V to the unit.
12. Flash Memory (IC512)
This memory is used for voice prompt and TAM.
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5.2.1. GENERAL BLOCK DIAGRAM
CROSS REFERENCE:
ANALOG UNIT BLOCK DIAGRAM(P.166)
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KX-FP158RU-B / KX-FP158RU-W
