Jump to content

Sony HB-F1XD Service Guide

From RetroTechCollection

The HB-F1XD サービスガイド (HB-F1XD Service Guide) is Sony's Japanese-language service guide for the HB-F1XD, an MSX2 computer with a built-in 3.5-inch floppy drive. The cover gives the price as ¥54,800 and the release as October 1987 (Shōwa 62).[1] The copy hosted here is a 22-page PDF scanned by Hans Otten (HansO) in 2001 from a photocopy supplied by Bas Kornalijnslijper of the MCWF, and comes from the MSX Archive.[2] Bound in after the cover is Sony's supplement 追加-1 (Addition 1), part number 9-953-028-81, dated August 1988, which covers the floppy drive.[3]

It is the nearest Sony service document to the Sony HB-F1XDJ and Sony HB-F1XV, which use the same case and the same HIC-1 video and audio module, and for which no service manual has been found.[4][5]

Contents

[edit | edit source]

The guide has no contents list. This is what each page holds:

PDF page Printed page Contents
1 none Cover, price and release date, outline specification (CPU, memory, display, keyboard, floppy drive), a note that the machine is built to Japanese electrical safety law and cannot be used abroad
2 none Supplement 追加-1: the floppy drive is the MFD-11W-51L; its documentation is the separate MP-F11W guide (9-975-185-60), and the drive is the MP-F11W-50L without its front panel, eject button and LED
3 2 Input and output connectors, general specification, accessories, service precautions
4 3 Names and functions of the controls, front and rear
5 4 Removing the floppy drive unit; memory map
6 5 Adjustments: the BASIC check program, CPU clock, timer clock, floppy controller VCO and read pulse, with the test points on the PU-14 main board
7 6 Outline drawings of the semiconductors
8 none Semiconductor locations by grid reference; notes on the board drawings
9 to 11 7 to 10 Board drawings: VR-5, VR-6 and LE-10 control and lamp boards, keyboard, PU-14 main board, PS-5 power board, CN-12 drive connector board
12 11 HIC-1 circuit diagram (RGB/NTSC encoder module)
13 to 16 12 to 15 Exploded views and mechanical parts lists: cabinet, chassis, keyboard, keytops
17 to 22 none Schematic diagrams, including the power supply on page 22

The specification on PDF page 3 gives AC 100 V ±10 %, 50/60 Hz, a maximum consumption of 31 W, a size of 416.5 × 81.5 × 300 mm and a weight of about 3.7 kg. The accessories include two AA (単3) dry cells.[6]

What it settles

[edit | edit source]
  • The power supply on the HB-F1XD (PDF page 22): the transformer on the PS-5 board feeds the PU-14 main board through CN5. +5 V comes from D1 and D2 (S2V20F), reservoir C1 (22,000 µF, 16 V) and regulator IC1 (SI-3062V), with 10.1 V at its input and 4.9 V at its output and C10 (47 µF, 16 V) on the output. +12 V comes from D3 (10E2-TA2), C11 (330 µF, 35 V) and IC2 (µPC78L12), 22.5 V in and 12.5 V out, with C15 (47 µF, 16 V). −12 V comes from D4 (10E2-TA2), C12 (330 µF) and IC3 (NJM79L12A), −23 V in and −12 V out, with C16 (47 µF, 16 V). The floppy drive takes its power from CN7.[7]
  • The adjustments (PDF page 6): CPU clock 3,579,530 to 3,579,550 Hz at TP2, set with CV1; timer clock at TP1, set with CV2 to the range printed as "15,9999Hz ～ 16,000Hz", using the check program to start the clock output; floppy controller VCO 253 kHz at TP5, set with RV1, about three minutes after switch-on and with TP4 (pin 22 of IC10) grounded; read pulse 500 ns at TP3, set with RV2. All are on the PU-14 board. The check program's header reads "for HB-F5/F500".[8]
  • The HIC-1 module's internal circuit (PDF page 12), which the HB-F1XDJ and HB-F1XV capacitor guides refer to.

What it does not contain

[edit | edit source]
  • No electrical replacement parts list. Component values appear only on the schematic, and the parts lists cover cabinet, chassis and keyboard parts.
  • No fault-finding section and no self-test procedure.
  • Nothing for the floppy drive beyond the supplement's note; Sony put the drive in the separate MP-F11W guide, which is not part of this scan.
  • Nothing specific to the HB-F1XDJ or HB-F1XV. Their main boards differ from the HB-F1XD's (they carry the MSX2+ video chip and the FM sound chip), so check any designator or value against the board before using it on those machines.
  • The schematic pages are reduced to fit the page, and small print on them is hard to read in this scan.

Pages that cite this document

[edit | edit source]

Download: Sony HB-F1XD Service Guide.pdf

References

[edit | edit source]
  1. ↑ Sony, HB-F1XD サービスガイド, PDF page 1 (cover): price ¥54,800, released October 1987; outline specification.
  2. ↑ Index of /pub/msx/docs/service_manuals, MSX Archive—link(accessed 2026-10-21) Directory of MSX service manuals, including sonyhbf1xdsm.pdf (2.5 MB).
  3. ↑ Sony, HB-F1XD サービスガイド, PDF page 2: サービスガイド/補修部品表 追加-1, part number 9-953-028-81, 88H0507-1, © 1988.8.
  4. ↑ MSX2+, Japanese Wikipedia—link(accessed 2026-10-21) In Japanese. The HB-F1XDJ was released on 21 October 1988 and its case was carried over from the MSX2 HB-F1XD series.
  5. ↑ MSX2以降用ハイブリッドIC「EMC-NX0039」の回路図, 19 May 2020—link(accessed 2026-10-21) In Japanese. Mitsumi hybrid IC EMC-NX0039 (HIC-1): RGB to NTSC encoder (CXA1145M), sound output amplifier mixing the PSG, the 1-bit sound port and the audio from slots 1 and 2, reset and pause muting, cassette interface amplifiers and relay control. Used in the Sony HB-F1II, HB-F1XD, HB-F1XDmk2, HB-F1XDJ and HB-F1XV and the Panasonic FS-A1mkII and FS-A1F. Sony part number 1-464-877-11. The author notes that the HB-F1XD service guide also shows the module's internal circuit.
  6. ↑ Sony, HB-F1XD サービスガイド, PDF page 3 (printed page 2): general specification and accessories.
  7. ↑ Sony, HB-F1XD サービスガイド, PDF page 22: power supply schematic.
  8. ↑ Sony, HB-F1XD サービスガイド, PDF page 6 (printed page 5): adjustments.


Retrieved from "https://retrotechwiki.com/index.php?title=Sony_HB-F1XD_Service_Guide&oldid=27839"