Pioneer PL-990 Manuel utilisateur

Add A PreAmp On/Off Swith

to Pioneer PL-990

(ca. 2014 Model)

D. MCDONALD

14-FEBRUARY-2016

BACKGROUND

•Pioneer PL-990 Turntable has a built-in PreAmplifier

•This is useful for many because the Turntable Output is already amplified, and it

can be connected to AUX or CD (Line Level) Inputs

•If a PreAmplifier is NOT present in a turntable, then the output from the

turntable must be amplified before it becomes “Line Level” and useful.

•Old-School Amplifiers have a “Phono” Input for this express purpose

•Vintage Turntables do not have built-in PreAmplifiers, and Vintage

Amplifiers always had a “Phono” input that would appropriately

amplify the raw output signal from a turntable.

BACKGROUND

•Why would one need or want a switch?

•If you want to connect this turntable to the “Phono” input of your vintage amplifier and have it

work correctly, then a switch will help…

•If you don’t like the PreAmplifier included with this Turntable and want to use one of your own

choosing, then a switch will help…

•If you just want to have a turntable, and just want to listen to sounds from vinyl LPs, and don’t have

an amplifier with a “Phono” input that you want to use, then this switch doesn’t really matter.

•If you are more than a little picky about the quality of sounds you listen to, or if you

care about the quality of the hardware you use to produce these sounds then you

probably won’t have a turntable like this, and then this switch doesn’t really matter.

BACKGROUND

•It appears that this Turntable model was designed with the capability of

having a PreAmp On/Off switch.

•This option seems to have only been enabled rarely, if ever.

•There is a hole molded in the plastic below the platter which allows access to the PreAmp PCB

where a switch would have been/could have been installed

•The PCB includes a location for a switch and nearly all of the electrical traces necessary for such a

switch

•Note that the PreAmplifier PCB in my turntable unit is significantly different

from the one described in a service manual available online.

•But the provision for a switch is available on both versions.

•My Turntable’s PreAmp is based on a TI-DRV602 chip.

A LOOK AT WHERE THE SWITCH SHOULD BE

•2. Remove Pad,

Rotate Platter

•1. Remove Top Cover •3. Look Here

(No Switch!)

A LOOK AT WHERE THE SWITCH SHOULD BE

•Look Here (No Switch!)

No Switch (As Received)

•Look Here (No Switch!)

WHAT TO DO (SUMMARY)

•Dismantle Turntable, to gain access to PreAmp PCB

•Remove some jumpers from the PCB

•Some jumpers are present which make the PCB Default to PreAmp

Always-On

•Install some additional jumpers to the PCB

•Some jumpers will be needed to complete the electrical pathways for the

unamplified signal

•Install an appropriate switch into the position provided

•Reassemble Turntable

MY MODEL IDENTIFICATION

•Pioneer PL-990

•Mfr Date: Jan-2014

•Made in China

DISMANTLE THE TURNTABLE

REMOVE THE PLATTER

•Unhook the Belt

•Then Pull the Platter straight up

Autres manuels pour PL-990

3

Autres manuels Pioneer Amplificateur

Pioneer

Pioneer SA-1060 Manuel utilisateur

Pioneer

Pioneer A-51 Manuel utilisateur

Pioneer

Pioneer SA-7800 Manuel utilisateur

Pioneer

Pioneer GM-1006ZG Manuel utilisateur

Pioneer

Pioneer A-509R Manuel utilisateur

Pioneer

Pioneer SA-5500II Manuel utilisateur

Pioneer

Pioneer A-550R Manuel utilisateur

Pioneer

Pioneer GM-D1004 Manuel utilisateur

Pioneer

Pioneer GM6400F - Bridgeable Amplifier Manuel utilisateur

Pioneer

Pioneer VSA-1000 Manuel utilisateur

Pioneer

Pioneer GM-X962XR/UC Manuel utilisateur

Pioneer

Pioneer A-351R Manuel utilisateur

Pioneer

Pioneer M-IS22 Manuel utilisateur

Pioneer

Pioneer GM-X424 X1R/UC Manuel utilisateur

Pioneer

Pioneer VSA-E08 Manuel utilisateur

Pioneer

Pioneer SA-V350 Manuel utilisateur

Pioneer

Pioneer PREMIER PRS-D1200M Manuel utilisateur

Pioneer

Pioneer GM-3300T Manuel utilisateur

Pioneer

Pioneer Elite SX-A6MK2-K Manuel utilisateur

Pioneer

Pioneer SC-LX90 Manuel utilisateur

Pioneer

Pioneer SP-X707 Manuel utilisateur

Pioneer

Pioneer SA-9500II Manuel utilisateur

Pioneer

Pioneer A-A9MK2-K Manuel utilisateur

Pioneer

Pioneer GM-A6704 Manuel utilisateur

Manuels Amplificateur populaires d'autres marques

ASTRO

ASTRO HVO V40 P Manuel utilisateur

Marantz

Marantz SUPERSCOPE BLA-545 Instructions de montage

NAD

NAD CI980 Manuel utilisateur

Technics

Technics SE-CH770 Manuel utilisateur

Harman Kardon

Harman Kardon HK6300 Manuel utilisateur

NAD

NAD T975 Manuel utilisateur

McIntosh

McIntosh MA6850 Manuel utilisateur

Electro-Harmonix

Electro-Harmonix ENGLISH MUFF’N Manuel utilisateur

Viatron

Viatron Autrix Manuel utilisateur

GME

GME GA9800 Manuel utilisateur

Atlas

Atlas CP700 Manuel utilisateur

Roland

Roland KC-1000 Manuel utilisateur

Pyle

Pyle PFMRA350BW Manuel utilisateur

Advantage

Advantage S-250 Manuel utilisateur

IRT Electronics

IRT Electronics DVA-3007 Manuel utilisateur

Dimavery

Dimavery BA-100 Series Manuel utilisateur

Sony

Sony XM-S400D Manuel utilisateur

Schertler

Schertler ROY X Manuel utilisateur