Toshiba e-STUDIO 203 Manuale di servizio - Pagina 13

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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

CONTENTS

e-STUDIO163/165/166/167/203/205/206/207/237

CONTENTS