4. NCU PBA ..................................................................................................... 7-77
4.1
Line Path Switching Control Circuit ................................................................ 7-79
4.2
Dial Pulse Generation Circuit ......................................................................... 7-81
4.3
Line Current Detect Circuit ............................................................................. 7-83
4.4
CI Detect Circuit ............................................................................................. 7-85
4.5
Line Monitor Circuit ........................................................................................ 7-87
4.6
Hook Detect Circuit (US/CA models only) ...................................................... 7-90
5. MOTHER PBA ............................................................................................. 7-91
6. OPERATION PANEL PBA ........................................................................... 7-93
7. LVPS ............................................................................................................ 7-95
7.1
Power Supply Voltage Generation ................................................................. 7-96
7.2
Stabilizing Circuit ............................................................................................ 7-97
7.3
Power Output Control Circuit .......................................................................... 7-98
7.4
Heater Drive Circuit ........................................................................................ 7-99
8. HVPS ............................................................................................................ 7-100
9. PC I/F PBA ................................................................................................... 7-102
10. MODEM PBA ............................................................................................... 7-103
11. TEL PBA ...................................................................................................... 7-104
12. MEMORY PBA ............................................................................................. 7-105
13. Bypass Tray Control Circuit ...................................................................... 7-106
14. OPTIONAL TRAY PBA ................................................................................ 7-108
Summary of Contents for DP120F
Page 1: ...PLAINPAPERFACSIMILE File No 31200001 R0112216901 TTEC ...
Page 401: ...DP120F DP125F Circuit Description 7 92 March 2000 TOSHIBA TEC 07 05 00 Fig 7 5 1 ...
Page 656: ...DP120F DP125F Troubleshooting 11 44 March 2000 TOSHIBA TEC ...
Page 700: ...DP120F DP125F Appendix 12 2 March 2000 TOSHIBA TEC 1 2 Error Count List ...
Page 701: ...March 2000 TOSHIBA TEC 12 3 DP120F DP125F Appendix 1 3 Function List for Maintenance ...
Page 702: ...DP120F DP125F Appendix 12 4 March 2000 TOSHIBA TEC 1 4 Drum Unit ...
Page 703: ...March 2000 TOSHIBA TEC 12 5 DP120F DP125F Appendix 1 5 Memory Dump List ...
Page 706: ...SHUWA SHIBA PARK BLDG A 2 4 1 SHIBA KOEN MINATO KU TOKYO 105 8524 JAPAN ...