TELU/TEL-W2/TEL-W1/TEL-W2D/TEL-W2F
40838301TH Rev.1
A3 - 49
3-2
TEL-W2 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 accordance
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 SW3 connect the resistors in parallel. The sending level
is maximum when all the bits of SW3 are set to ON, and minimum when all the bits
of SW3 are set to OFF.
3)
Receiving Level Adjustment
The receiving level is determined by the circuit section formed by resistors R34, R35,
R36, R82, R83 and R84, and the bits of SW5. The receiving level is minimum when
all the bits of SW5 are set to ON, and maximum when all the bits of SW5 are set to OFF.
4)
Sending Frequency Response Adjustment
The circuit section affecting the low range level of the sending frequency response is
formed by capacitors C59, C35, C36 and C60, which are connected in series to the
section in front of a transmitter. The low range level can be adjusted by the ON/OFF
setting of bits 1 and 2 of SW3. The high range level can be adjusted by the ON/OFF
setting of SW6-5.
Note: When the frequency response is changed, the sending and receiving levels
may be
changed. Verify the sending and receiving levels after adjustment.
5)
Side Tone Adjustment
The setting of the side-tone level is performed by the setting of SW1-1 through 8 and
SW2-1. One of these bits it set to ON for each individual country. The side-tone level
is interrelated with the receiving and sending level. The side-tone level becomes
higher when the sending and receiving level are set lower.
Note: After the side tone level is changed, the sending and receiving levels change,
so readjust the sending and receiving level and reverify and readjust the side
tone.
6)
DC V-I (voltage-versus-current) Characteristics Adjustment
The adjustment of the DC V-I characteristics at the time of line supplement is
performed by D10, D11, D12, SW2-7, R25 and SW2-8. When raising the DC V-I value,
set SW 2-7 to OFF or SW2-8 to ON. When decreasing the value, set SW2-7 to ON,
or SW2-8 to OFF.
Содержание OKIFAX 5400
Страница 7: ...40838301TH Rev 1 CHAPTER 1 GENERAL INFORMATION...
Страница 46: ...40838301TH Rev 1 CHAPTER 2 INSTALLATION PROCEDURE...
Страница 130: ...40838301TH Rev 1 CHAPTER 3 BRIEF TECHNICAL DESCRIPTION...
Страница 138: ...40838301TH Rev 1 CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY...
Страница 157: ...40838301TH Rev 1 CHAPTER 5 ADJUSTMENTS...
Страница 162: ...40838301TH Rev 1 CHAPTER 6 CLEANING AND MAINTENANCE...
Страница 189: ...40838301TH Rev 1 CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIFAX 5400...
Страница 240: ...40838301TH Rev 1 CHAPTER 8 DIPSWITCHS SETTING TABLES...
Страница 353: ...40838301TH Rev 1 Appendix B Descriptions of Print Operation First Edition August 1999 Oki Data Corporation...
Страница 375: ...40838301TH Rev 1 Appendix C Circuit Diagram and Parts List OK IFAX 5400 First Edition August 1999 Oki Data Corporation...
Страница 380: ...40838301TH Rev 1 D 2 SECTION 1 CABINET ASSEMBLY 5...
Страница 382: ...40838301TH Rev 1 D 4 SECTION 2 CONTROL PANEL ASSEMBLY...
Страница 384: ...40838301TH Rev 1 D 6 SECTION 3 PRINTER ASSEMBLY 51...
Страница 387: ...40838301TH Rev 1 D 9 SECTION 4 BASE ASSEMBLY 30 37 36 39 40 5...
Страница 390: ...40838301TH Rev 1 D 12 SECTION 5 SCAN UNIT...
Страница 392: ...40838301TH Rev 1 D 14 SECTION 6 PAPER GUIDE U ASSEMBLY...
Страница 394: ...40838301TH Rev 1 D 16 SECTION 7 CABLES 10 11 19 12 20 21...
Страница 396: ...40838301TH Rev 1 D 18 SECTION 8 OPTION TELEPHONE US...
Страница 399: ...40838301TH Rev 1 D 21 SECTION 8 OPTION TELEPHONE UK ITA NOR DEN BEL...
Страница 402: ...40838301TH Rev 1 D 24 SECTION 8 OPTION TELEPHONE HOL GER FRA SWITZ AUT INT L...
Страница 405: ...40838301TH Rev 1 Appendix E Board Layout OKIFAX 5400 First Edition August 1999 Oki Data Corporation...
Страница 424: ...40838301TH Rev 1 F 15 5 2 PCB Layout TQSB 2PCB PU FG CONTROLLER MOTOR DRIVER SEN2 MOTOR OSC SEN1...
Страница 425: ...40838301TH Rev 1 F 16 Figure 6 1 6 PARTS LIST SECTION1 CABINET CASSETTE ASSEMBLY F 16 1 4 P 6 5 8 7 3 O 1 2...
Страница 426: ...40838301TH Rev 1 F 17 SECTION2 MECHANICAL ASSEMBLY Figure 6 2 F 16 2 9 A 0 C M L D N E F G H U V T S Q R J I B K A A B B...
Страница 428: ...40838301TH Rev 1 Appendix G RMCS SYSTEM MANUAL For Model 20 First Edition August 1999 Oki Data Corporation...