General Description - Toshiba E-Studio 163 Service Manual

1. SYSTEM BLOCK DIAGRAM ........................................................................................ 1-1
1.1 e-STUDIO163/166/203/206 ................................................................................................. 1-1
1.2 e-STUDIO165/205 ............................................................................................................... 1-2
1.3 e-STUDIO167/207/237 ........................................................................................................ 1-3
2. GENERAL DESCRIPTION OF MAIN IC....................................................................... 2-1
2.1 ASIC (EC/N106) .................................................................................................................. 2-1
2.1.1 Functions .................................................................................................................. 2-1
2.1.2 Pin assignment ......................................................................................................... 2-1
2.1.3 Signals...................................................................................................................... 2-2
3. ELECTRIC CIRCUIT DIAGRAMS................................................................................. 3-1
3.1 Main circuit (MAIN board: e-STUDIO163/165/203/205) ...................................................... 3-2
3.2 SRAM circuit (SRAM board: e-STUDIO163/165/203/205) ................................................ 3-36
3.3 Laser drive circuit (LDR board).......................................................................................... 3-37
3.4 H-sync signal detection circuit (SNS board) ...................................................................... 3-39
3.5 Fuse circuit (FUS board).................................................................................................... 3-40
3.6 Control panel circuit (LPNL board: e-STUDIO163/166/203/206)....................................... 3-41
3.7 Control panel circuit (HPNL board: e-STUDIO165/205) .................................................... 3-45
3.8 Paper feed control circuit (PFC board: GH-1050).............................................................. 3-49
3.9 Facsimile circuit (FAX board: GD-1220) ............................................................................ 3-53
3.10 Telephone line network control circuit (NCU board: GD-1220NA/TW).............................. 3-58
3.11 Telephone line network control circuit (NCU board: GD-1220EU/AU) .............................. 3-60
3.12 TELBOOK circuit (TELBOOK board: GJ-1040) ................................................................. 3-62
3.13 External keyboard circuit (OTK board: GJ-1040)............................................................... 3-63
3.14 Memory circuit (MEM board: GC-1240)............................................................................. 3-64
3.15 Main circuit (MAIN board: e-STUDIO166/206) .................................................................. 3-65
3.16 Main circuit (MAIN board: e-STUDIO167/207/237) ........................................................... 3-99
3.17 SRAM circuit (SRAM board: e-STUDIO166/167/206/207/237) ....................................... 3-134
3.18 Control panel circuit (HPNL board: e-STUDIO167/207/237) ........................................... 3-135
3.19 Paper feed control circuit (PFC board: GH-1060)............................................................ 3-139
© June 2006 TOSHIBA TEC CORPORATION All rights reserved
CONTENTS
e-STUDIO163/165/166/167/203/205/206/207/237
CONTENTS