40055101TH Rev.4
474 /
3-2
TEL-W2F circuit diagram
Note: Each country’s hardware parameters comparison table refer to page A3-82 ~ 83.
1)
Speech IC
General functions of the speech IC are as follows:
•
Basic speech functions included.
•
Separate receive pre-amplifier with signal output terminal
•
Separate receive power amplifier input terminal, cause it is possible to mixing input.
•
Balanced input for microphone input to provide immunity to common mode noise.
•
MF pre-amplifier input terminal is possible to mixing input.
•
Dial pulse waveform improvement circuit included.
•
Manual pad function included.
•
The transmit, receive, and DTMF amplifier are provided with AGC in accodance with
the line current.
2)
Sending Level Adjustment
The sending level is determined by the circuit section formed by resistors R55, R56,R57
and R58, and the bits of R110-R114 connect the resistors in parallel. The sending level is
maximum when all the bits of R110-R114 are set to "Mount", and minimum when all the
bits of R110-R114 are set to "Not mount".
3)
Receiving Level Adjustment
The receiving level is determined by the circuit section formed by resistors R34, R35, R36,
R37 and R38, and the bits of R101-R105. The receiving level is minimum when all the
bits of R101-R105 are set to "Mount", and maximum when all the bits of R101-R105 are
set to "Not mount".
4)
Sending Frequency Response Adjustment
The circuit section affecting the low range level of the sending frequency response is
formed by capacitors, C35 and C36, which are connected in series to the section in front of
a transmitter.
Note: When the fequency response is changed, the sending and receiving levels may be
changed. Verify the sending and receiving levels after adjustment.
5)
Side Tone Adjustment
Adjustment is unavailable.
6)
DC V-I (voltage-versus-current) Characteristics Adjustment
Adjustment is unavailable.
7)
Return Loss
Adjustment is unavailable.
8)
AGC (automatic gain control)
Adjustment is unavailable.
Summary of Contents for B4100
Page 73: ...40055101TH Rev 4 73 2 For OKIFAX 5000 series AC Power Switch AC Inlet FX050VP C2 014...
Page 158: ...40055101TH Rev 4 158 Appearance of the OKIOFFICE44 OKIFAX 4100 FX048 CP4 1 Fig 01...
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Page 545: ...40055101TH Rev 4 545 54 SECTION 1 CABINET ASSEMBLY FAX NIP FX048...
Page 548: ...40055101TH Rev 4 548 SECTION 2 UNIT PRINTER...
Page 550: ...40055101TH Rev 4 550 SECTION 3 UNIT 048 OPE PANEL...
Page 552: ...40055101TH Rev 4 552 SECTION 4 OPEPANEL OPERATION PANEL ASSEMBLY...
Page 554: ...40055101TH Rev 4 554 SECTION 5 FRAME ASSEMBLY SCANNER L...
Page 556: ...40055101TH Rev 4 556 SECTION 6 PLATE ASSEMBLY SCANNER B...
Page 558: ...40055101TH Rev 4 558 SECTION 7 PLATE ASSEMBLY SCANNER R...
Page 560: ...40055101TH Rev 4 560 17 16 15 10 SECTION 8 FRAME ASSEMBLY SCANNER U...
Page 562: ...40055101TH Rev 4 562 13 SECTION 9 COVER ASSEMBLY TOP...
Page 564: ...40055101TH Rev 4 564 SECTION 10 PLATE ASSEMBLY BASE...
Page 569: ...40055101TH Rev 4 569 SECTION 12 PRINTER HEAT ASSY...
Page 571: ...40055101TH Rev 4 571 SECTION 13 CABLES...
Page 574: ...40055101TH Rev 4 574 SECTION 1 CABINET ASSEMBLY...
Page 576: ...40055101TH Rev 4 576 SECTION 2 CONTROL PANEL ASSEMBLY OKIFAX 5200 5300...
Page 577: ...40055101TH Rev 4 577 SECTION 2 CONTROL PANEL ASSEMBLY OKIFAX 5500 5600...
Page 579: ...40055101TH Rev 4 579 SECTION 3 PRINTER ASSEMBLY...
Page 582: ...40055101TH Rev 4 582 SECTION 4 BASE ASSEMBLY 30 37 38...
Page 585: ...40055101TH Rev 4 585 SECTION 5 SCAN UNIT...
Page 587: ...40055101TH Rev 4 587 SECTION 6 PAPER GUIDE U ASSEMBLY...
Page 589: ...40055101TH Rev 4 589 SECTION 7 CABLES 10...
Page 591: ...40055101TH Rev 4 591 SECTION 8 OPTION TELEPHONE US...
Page 594: ...40055101TH Rev 4 594 SECTION 8 OPTION TELEPHONE UK ITA NOR DEN BEL...
Page 597: ...40055101TH Rev 4 597 SECTION 8 OPTION TELEPHONE HOL GER FRA SWITZ AUT INT L...