#Bill of Materials
Note Some of the values (Resistors and condensers) are approximations. Take them with a grain of salt.
| Name | Model | Description | Notes | | U1 | N/A | Not connected | Looks like a beefier voltage regulator | | U2 | TPS76601 | 5.5V Voltage regulator | | | U3 | N/A | Not connected | A voltage supervisor maybe? | | U4 | BS250 | Enhancement mode MOSFET | | | U5 | MM74GC86M | Quad 2-input OR | | | U8,U9 | 74VHC244 | Octal Line Driver | | | U10 | MM74HC374WM | Tristate Octuple D Flip Flop | | | U11 | PIC16C54C | 8-bit microcontroller | Manages IR communications | | U12 | PHR? | Too small to identify | Maybe a voltage regulator? | | U14 | Z8S18010VSG | Z180 Microprocessor | | | U17 | CY62138F | 2-Mbit (256k) SRAM | | | U18 | M27C801 | 8-Mbit (1MB) UV-EPROM | | | U19 | 74HC138D | 3-to-8 Line Decoder | | | U20 | 74GC00M | Quad NAND Gate | | | U21 | 74HC139B | Dual 2-to-4 Line Decoder | | | Y1 | 32C821 | Unknown Crystal Oscillator | I think is a 32.768 khz oscillator | | Y2 | 6.14ECSR | Unknown Crystal Oscillator | 6.14 Mhz crystal for the Z180 | | D1-D8 | N/A | Unknown radial diode | The closest thing I have is a 1N4148 | | D13,D14 | V4H | Zener Diode 2.4V 150mW | | | D15 | N/A | Not Connected | | | D16 | N/A | Not Connected | | | D17 | V4H | Zener Diode 2.4V 150mW | | | LED1 | N/A | IR Led | | | Q1-Q3 | 589 | BD589 NPN Transistor | | | C2,C3 | | 900nF | | | C10 | | 100nF | | | C13 | | 180pF | | | C14 | N/A | Not connected | | | C15 | | 450pF | | | C16 | | 900nF | | | C17,C18 | | 150pF | | | C19-C21 | | 100nF | | | C22 | | 900nF | | | C27 | | 380pF | | | C28 | | 500pF | | | C30,C31 | | 100nF | | | C33 | | 100nF | | | C36 | N/A | Not connected | | | C37 | | 100nF | | | C38 | GC5.5V0.22F | | Helps changing batteries | | C39 | | 100nF | | | R4 | | 100k | | | R5 | | 1k | | | R6 | | 10k | | | R7 | | 165k | | | R8 | | 100k | | | R9 | | 300k | | | R10 | | 100k | | | R11 | | 2200 | | | R12 | | 470k | | | R13 | | 100k | | | R14 | | 33k | | | R15 | | 1k | | | R16 | | 100k | | | R17,R18 | | 100 | | | R19 | | 10k | | | R20,R21 | | 100k | | | R22,R23 | | 1k | | | R24 | | 220k | | | R25 | | 0 (shunt) | | | R26 | N/A | Not connected | | | R27,R28 | | 22k | | | R29 | | 10k | | | RN1,RN2 | L101C103 | 10 pin 10k Resistor Network | | | POT1 | 103 | 10k 90º TH Potentiometer | Contrast adjust for screen | | L1 | 100J | 1uH inductor | | | KB1 | N/A | 28x1 TH Flat Cable Connector | Connector for the keyboard | | J1 | N/A | 6pin TH 90º RJ Connector | Unknown use. Printer? | | LCD1 | N/A | 8x2 TH 2.54 Male Connector | Connector for the screen | | H1 | N/A | Not Connected | Probably for external power | | H2 | N/A | 2 pin TH JSX 90º Connector | Connector for the battery | | SW1 | N/A | 90º TH Momentary Switch | Reset button |
To do: check led diameter, check flat cable connector pitch, check front face resistor values.