Article #1 | 06:30 PM Saturday 12/10/2018

Introduction

Despite the lack of quality radio stations around where I live, I always wanted a good tuner.

Disclaimer
The following articles are not to be treated as do-it-yourself tutorials on how to fix, restore, rebuild, or improve the unit in cause. This was not my initial intention. But you can consider this whole content as a general guideline, should you decide to launch into such an adventure.

The entire documentation is just a reflection of my work and I cannot be held responsible if you damage your unit, or even harm yourself in the process.

Article #2 | 01:33 PM Wednesday 24/12/2020

Technical Data

This tuner has the following technical characteristics.

Article #3 | 01:50 PM Wednesday 24/12/2020

Parts List

I have assembled a parts list for this tuner.

The schematic value corresponds to what normally can be found in the electrical schematics. The recommended value is what I used as replacement for the former part. Where I found appropriate, I have chosen a film capacitor replacement instead of an electrolytic. My reasons are reliability in time. Less electrolytic capacitors, less time-ticking bombs.

Descriptions and Parts Listings

There is one capacitor underneath the chassis.

Chassis
Identifier	Schematic	Recommended	Mouser Number
C024	100 uF / 6.3 V	100 uF / 25 V	TBD

The Power Supply board is coded F-1455.

Power Supply (F-1455)
Identifier	Schematic	Recommended	Mouser Number
C006	100 uF / 25 V	100 uF / 35 V	647-UBT1V101MPD
C008	100 uF / 25 V	100 uF / 35 V	647-UBT1V101MPD
C009	100 uF / 16 V	100 uF / 35 V	647-UBT1V101MPD
C011	100 uF / 25 V	100 uF / 35 V	647-UBT1V101MPD
C012	220 uF / 10 V	220 uF / 25 V	647-UBT1E221MPD
C013	3.3 uF / 50 V	4.7 uF / 50 V	647-UBT1H4R7MPD

The FM IF Block is coded F-1419.

FM IF Block (F-1419)
Identifier	Schematic	Recommended	Mouser Number
C222	10 uF / 16 V	10 uF / 50 V	647-UPW1H100MDD

The FM MPX Block is coded F-1420E.

FM MPX Block (F-1420E)
Identifier	Schematic	Recommended	Mouser Number
C401	10 uF / 25 V	10 uF / 50 V	647-UFG1H100MDM
C406	47 uF / 6.3 V	47 uF / 25 V	647-UPW1E470MDD
C407	10 uF / 25 V	10 uF / 50 V	647-UPW1H100MDD
C408	10 uF / 25 V	10 uF / 50 V	647-UFG1H100MDM
C409	47 uF / 16 V	47 uF / 25 V	647-UPW1E470MDD
C410	10 uF / 25 V	47 uF / 25 V	647-UFG1H100MDM
C411	47 uF / 16 V	47 uF / 25 V	647-UPW1E470MDD
C414	100 uF / 25 V		647-UFG1E101MPM
C421	1 uF / 50 V	1 uF / 50 V FILM	N/A
C426	100 uF / 25 V		647-UFG1E101MPM
C427	10 uF / 25 V	10 uF / 50 V	647-UPW1H100MDD
C429	3.3 uF / 25 V	XXX uF / 50 V	XXX
C430	100 uF / 25 V		647-UFG1E101MPM
C435	3.3 uF / 25 V	XXX uF / 50 V	XXX

The AM Block is coded F-1417A.

AM Block (F-1417A)
Identifier	Schematic	Recommended	Mouser Number
C302	1 uF / 50 V	1 uF / 50 V FILM	N/A
C307	1 uF / 50 V	1 uF / 50 V FILM	N/A
C318	10 uF / 25 V	10 uF / 50 V	647-UPW1H100MDD
C321	1 uF / 50 V	1 uF / 50 V FILM	N/A
C329	4.7 uF / 25 V	4.7 uF / 50 V	647-UPW1H4R7MDD
C339	47 uF / 16 V	47 uF / 25 V	647-UPW1E470MDD

The Filter Block is coded F-1421.

Filter Block (F-1421)
Identifier	Schematic	Recommended	Mouser Number
C603	33 uF / 25 V		647-UFG1V330MEM
C604	33 uF / 25 V		647-UFG1V330MEM
C609	100 uF / 6.3 V	100 / 16 V	647-UFG1C101MPM
C610	100 uF / 6.3 V	100 / 16 V	647-UFG1C101MPM
C611	10 uF / 25 V	10 uF / 50 V	647-UFG1H100MDM
C612	10 uF / 25 V	10 uF / 50 V	647-UFG1H100MDM
C613	10 uF / 25 V	10 uF / 50 V	647-UFG1H100MDM
C614	10 uF / 25 V	10 uF / 50 V	647-UFG1H100MDM
C616	100 uF / 25 V		647-UFG1E101MPM

...

Tip
Should you venture into such a restoration, do not hurry, take your time and do the job once. And do it well.

your help matters

Please note that all the work presented on this site is non-commercial. This is my hobby, and I do this in my spare time. Since I freely share my knowledge, if you like my work, please consider helping me buy a transistor or a capacitor for my projects.

Thank you!