DOWNLOAD Panasonic KX-MB1900RUB / KX-MB1900RUW Service Manual ↓ Size: 15.99 MB | Pages: 127 in PDF or view online for FREE

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KX-MB1900RUB/KX-MB1900RUW

1. Toner low can be judged by continuous 5-times TONER LOW signal at only printing.

(It is not executed at.)

2. Toner full can be judged by continuous 6-times TONER FULL signal at initialization.

(It is not executed at printing.)

3. In the ordinal operation, “CHANGE DRUM” is displayed when TONER EMPTY sensor does not generate a signal for 7.4 sec-

onds.

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KX-MB1900RUB/KX-MB1900RUW

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KX-MB1900RUB/KX-MB1900RUW

The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array
(IC1) on Operation board and IC300 on Main board. 
The key matrix table is shown below.

1. Key Matrix 

a. Hard Scan

*LED7 should be set to KSL4.  "8 x 5" key matrix is executed by hardware scanning. 

2. LED

• AUTO ANSWER LED ON/OFF port---LED2 (IC1-36pin)
• COPY MODE LED ON/OFF port---XLED12 (IC1-15pin)
• SCAN MODE LED ON/OFF port---XLED11 (IC1-16pin)

The Gate Array (IC1) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the LCD drive. 
R6 and R7 are density control resistors. 
Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC1).

KIN0

KIN1

KIN2

KIN3

KIN4

KIN5

KIN6

KIN7

KSL0

8

7

↓

9

S2

S4

RESOLUTIOIN

KSL1

0

→

#

CONTRAST

KSL2

2

1

MENU

3

REDIAL

S1

COLLATE

KSL3

STOP

←

↑

START

N in 1

COPY

S3

ZOOM

KSL4
(LED7)

5

4

SET

6

SCAN

AUTO
ANSWER

CN2

CN511

IC300

ASIC

LCD MODULE

CN1

8x5

KEYS

MATRIX

(Hard)

LED

MAIN BOARD

OPERATION BOARD

GATE ARRAY IC

IC1

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KX-MB1900RUB/KX-MB1900RUW