TELU/TEL-W2/TEL-W1/TEL-W2D/TEL-W2F
40838301TH Rev.1
A3 - 62
3-5
TEL-W2F circuit diagram
Note: Refer to each country’s hardware parameters comparison table.
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 OKIFAX 5400
Page 7: ...40838301TH Rev 1 CHAPTER 1 GENERAL INFORMATION...
Page 46: ...40838301TH Rev 1 CHAPTER 2 INSTALLATION PROCEDURE...
Page 130: ...40838301TH Rev 1 CHAPTER 3 BRIEF TECHNICAL DESCRIPTION...
Page 138: ...40838301TH Rev 1 CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY...
Page 157: ...40838301TH Rev 1 CHAPTER 5 ADJUSTMENTS...
Page 162: ...40838301TH Rev 1 CHAPTER 6 CLEANING AND MAINTENANCE...
Page 189: ...40838301TH Rev 1 CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIFAX 5400...
Page 240: ...40838301TH Rev 1 CHAPTER 8 DIPSWITCHS SETTING TABLES...
Page 380: ...40838301TH Rev 1 D 2 SECTION 1 CABINET ASSEMBLY 5...
Page 382: ...40838301TH Rev 1 D 4 SECTION 2 CONTROL PANEL ASSEMBLY...
Page 384: ...40838301TH Rev 1 D 6 SECTION 3 PRINTER ASSEMBLY 51...
Page 387: ...40838301TH Rev 1 D 9 SECTION 4 BASE ASSEMBLY 30 37 36 39 40 5...
Page 390: ...40838301TH Rev 1 D 12 SECTION 5 SCAN UNIT...
Page 392: ...40838301TH Rev 1 D 14 SECTION 6 PAPER GUIDE U ASSEMBLY...
Page 394: ...40838301TH Rev 1 D 16 SECTION 7 CABLES 10 11 19 12 20 21...
Page 396: ...40838301TH Rev 1 D 18 SECTION 8 OPTION TELEPHONE US...
Page 399: ...40838301TH Rev 1 D 21 SECTION 8 OPTION TELEPHONE UK ITA NOR DEN BEL...
Page 402: ...40838301TH Rev 1 D 24 SECTION 8 OPTION TELEPHONE HOL GER FRA SWITZ AUT INT L...