Panasonic KX-MB2230RU / KX-MB2270RU / KX-MB2510RU / KX-MB2540RU Service Manual ▷ View online
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KX-MB2230RU/ KX-MB2270RU/ KX-MB2510RU/ KX-MB2540RU
6.5.
ITS (Integrated telephone System) and Monitor Section ( Fax supported
models only )
models only )
6.5.1.
General
The general ITS operation is performed by IC201 which has a handset circuit. The alarm tone, the key tone, and the beep are
output from SOC (IC300).
output from SOC (IC300).
6.5.1.1.
Telephone Monitor
1. Function
This is the function when you are not holding the handset and can hear the caller’s voice from the line.
2. Circuit Operation
(Signal Path)
Signals received from the telephone line are output through at the speaker via the following path.
Signals received from the telephone line are output through at the speaker via the following path.
3. Signal Path
Refer to Check Sheet for Signal Route of MONITER RX (P.214).
6.5.1.2.
Monitor Circuit
1. Function
This circuit monitors various tones, such as (1) DTMF tone, (2) Alarm/Beep/Key tone/Bell.
2. Signal Path
a. DTMF Monitor
(Speaker Operation)
Refer to Check Sheet for Signal Route of DTMF Monitor (Speaker) (P.214).
Refer to Check Sheet for Signal Route of DTMF Monitor (Speaker) (P.214).
b. ALARM/BEEP/KEY TONE/BELL
Refer to Check Sheet for Signal Route of MONITER RX (P.214).
6.5.1.3.
TAM Interface Section
1. Function
When TAM is connected to this unit, the unit receives documents for FAX calls or the external TAM records a voice message
automatically.
automatically.
2. Circuit Operation
The TAM INTERFACE circuit consists of Soc(IC300) to detect the other party CNG signal, and RLY100 to separate EXT.TAM.
a. CNG Signal Detection Circuit
The CNG signal from the other party’s FAX is detected in SOC (IC300).
(Signal path)
Refer to Check Sheet for Signal Route of CNG/DTMF detection (P.214).
(Signal path)
Refer to Check Sheet for Signal Route of CNG/DTMF detection (P.214).
b. Remote Receiving
This is the parallel-connected DTMF signal for the TEL or EXT.TEL mode between T and R. When the other party is a
FAX, the unit switches to FAX receiving.
(Signal Path)
Refer to Check Sheet for Signal Route of CNG/DTMF detection (P.214).
FAX, the unit switches to FAX receiving.
(Signal Path)
Refer to Check Sheet for Signal Route of CNG/DTMF detection (P.214).
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KX-MB2230RU/ KX-MB2270RU/ KX-MB2510RU/ KX-MB2540RU
6.6.
CIS Control Section
The scanning block of this device consists of a control circuit and a CIS (contact image sensor), and AFE (Analog Front End)
include A/D Converter.
include A/D Converter.
When start the scanning, pin A3 of IC300 will be low level and the transistor Q518 turns on, 3.3V is supplied to the CIS.
The CIS is driven by each of the signals (CCDSH, CCDCLK, RESOLUTION) which are output from IC300.
The analog image signal is input to the AFE (20pin of IC503), and converted into 16-bit data by the A/D converter inside.
Then this signal undergoes digital processing in order to obtain a high-quality image in IC300.
Resolution
The CIS can change the resolution, 300dpi mode or 600dpi mode. If RESOLUTION signal is High level, CIS operates 600dpi mode.
The other case is 300dpi mode.
The CIS is driven by each of the signals (CCDSH, CCDCLK, RESOLUTION) which are output from IC300.
The analog image signal is input to the AFE (20pin of IC503), and converted into 16-bit data by the A/D converter inside.
Then this signal undergoes digital processing in order to obtain a high-quality image in IC300.
Resolution
The CIS can change the resolution, 300dpi mode or 600dpi mode. If RESOLUTION signal is High level, CIS operates 600dpi mode.
The other case is 300dpi mode.
Operation
CIS Resolution
300dpi
600dpi
COPY
-
ALL
PC SCAN
~300 X 300
400 X 400~
FAX
-
ALL
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KX-MB2230RU/ KX-MB2270RU/ KX-MB2510RU/ KX-MB2540RU
6.7.
Motor Drive Section
6.7.1.
Main Motor Control Circuit
1. Functions
All driving forces of printer engine part are supplied by this main motor.
Main motor is controlled so as to rotate at constant speed during printing and copying.
Main motor is controlled so as to rotate at constant speed during printing and copying.
2. Motor operation
<Start operation>
In order to start the motor rotation, following 3 signals are supplied from IC300.
In order to start the motor rotation, following 3 signals are supplied from IC300.
1. SS signal (Output pin: Pin D24/Output Signal: "H")
When this signal is inverted by transistor Q502 and becomes "L", motor recognize this signal as "start" signal.
2. Clock signal (Output pin: Pin C26/Output Signal: Pulse)
Pulse frequency :approx. 1.8KHz (at normal printing speed)
Pulse frequency :approx. 0.9KHz.(at half printing speed)
This signal is also inverted by transistor Q525, and supplied to motor as "clock" signal.
3. Brake signal (Output pin: Pin D26/Output Signal: "H")
When this signal is inverted by transistor Q526 and becomes "L", motor recognize this signal as "brake off" signal.
When this signal is inverted by transistor Q502 and becomes "L", motor recognize this signal as "start" signal.
2. Clock signal (Output pin: Pin C26/Output Signal: Pulse)
Pulse frequency :approx. 1.8KHz (at normal printing speed)
Pulse frequency :approx. 0.9KHz.(at half printing speed)
This signal is also inverted by transistor Q525, and supplied to motor as "clock" signal.
3. Brake signal (Output pin: Pin D26/Output Signal: "H")
When this signal is inverted by transistor Q526 and becomes "L", motor recognize this signal as "brake off" signal.
When motor reaches constant speed, "L" signal is supplied from motor to IC300 pin D25 as "Lock detect (LD)" signal.
If "LD" signal does not becomes "L" within predetermined period after "SS" signal becomes "H", or if "LD" signal becomes
"H" during rotation, it is judged that motor Error occurred.
If "LD" signal does not becomes "L" within predetermined period after "SS" signal becomes "H", or if "LD" signal becomes
"H" during rotation, it is judged that motor Error occurred.
Timing Chart of Start operation
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KX-MB2230RU/ KX-MB2270RU/ KX-MB2510RU/ KX-MB2540RU
<Stop operation>
In order to stop the motor rotation, following 2 signals are supplied from IC300.
1. SS signal (Output pin: Pin D24/Output Signal: "L")
When this signal is inverted by transistor Q502 and becomes "H", motor recognize this signal as "stop" signal.
2. Brake signal (Output pin: Pin D26/Output Signal: "L")
When this signal is inverted by transistor Q526 and becomes "H", motor recognize this signal as "brake on" signal.
In order to stop the motor rotation, following 2 signals are supplied from IC300.
1. SS signal (Output pin: Pin D24/Output Signal: "L")
When this signal is inverted by transistor Q502 and becomes "H", motor recognize this signal as "stop" signal.
2. Brake signal (Output pin: Pin D26/Output Signal: "L")
When this signal is inverted by transistor Q526 and becomes "H", motor recognize this signal as "brake on" signal.
Timing Chart of Stop operation
6.7.1.1.
Main Motor Drive Circuit
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