Pioneer lx 880 service manual

Page 1

Solid State AM/FM STEREO RECEIVER «

ModeI LXBB O

l

CAUTION Before connecting the line cord to the wall socket, carefully read
and follow the instructions shown below', to assure the safety '-
of your unit. »

0 Model LX-88O is set 240V operation when shipped. If .this unit
is used in a different line-voltage area, read and follow LINE
VOLTAGE SELECTION AND FUSE oh page -1.

Be sure.that the line voltage setting on your unit agrees with
the linevoltage in your area and that the fuse installed in your
unit is a proper one. I

_
INSTALLATION, OPERATING AND SERVICE MANUAL

lncludi'hg PARTS LIST, CIRCUIT DIAGRAMS AND TROUBLE SHOOTING

PIONEER ELECTRONIC CORPORATION

A

Page 2

SOME UNIQUE FEATURES:

3 FM front-end employlng a field effect
transistor to hear more stations more clearly

0 Integrated circuit (IC) employed in FM tuner
assures outstanding capture ratio with high
reliability

OMultiplex circuitry (MIX) for maximum
channel separation

0 Unique muting circuit permits the easiest
tuning control

0High performance single ended push-pull
(SEPP) output stage eliminates audio trans-
formers and provides large output with true
frequency fidelity

0 Full complement input and output jacks and
terminals

LOCATION FOR INSTALLATION OF MODEL LX-880

Your Model LX-880 is a solid-state unit. Determine
location for installation of the unit with the following

precautions in mind:

The place where influence of dust and humidity is not
significant and where good ventilation can be obtained.

By the use of PET (field effect transistor) in the FM radio frequency
amplifier stage, design of nearly perfect FM front-end was achieved
~lree from cross modulation, free from drift. with better sensitivity,
lower inherent noise, and high spurious rejection ratio.

In the FM intermediate frequency amplifier stage, integrated circuits
are employed, resulting in an entirely different outstanding performance
from that of IF stages hitherto designed, especially in the limiter char-
acteristic and the capture ratio.

The accurate electronic switching circuitry is employed in the FM
multiplex demodulator, insuring maximum separation with excellent
tonal quality.

The muting circuit provided in the FM tuner completely eliminates
the FM inter-station noise which has hitherto been annoying the user
in tuning.

The power-amplifier employs the high-performance single ended push-
pull circuitry in the output stage and the push-pull complementary
circuitry in the driver stage, completely eliminating the distortion
inherent transformers from the audio stage. Transistors are adopted
as the power transistors in the output stage for full-fidelity frequency
response with large audio output power and least harmonic distortion.

For reproduction of various program sources, this receiver is provided
with input jacks to be connected to a turntable equipped with a
magnetic cartridge, a semiconductor cartridge or a ceramic cartridge
as well as to microphones or a tape player (for monitoring). It is also
provided with 2 pairs of speaker output terminals, headphone jacks
and a tape recording jacks.

Note: Transistors get easily damaged by excessive heat.
Take special care to ventilation of the unit. Placing
things on the unit or installing the unit in recessed
place will tend to excessively raise the internal tem-
perature of the unit.

The place where the unit will not be exposed to the sun

rays.

LINE VOLTAGE SELECTION AND FUSE

SWITCHING LINE VOLTAGE SETTING AND FUSE

In order to remove the fuse, turn the fuse cap located on
the line voltage selector switch in the direction indicated by
an arrow. Then remove the fuse plug from the unit. Put
the fuse plug back so that the proper line voltage marking
can be seen thru the cut on the edge of the plug. Whenever
the set position of the selector switch is changed, check
the rating of the fuse. A (IS-ampere fuse is to be used for
either 220V or 240V operation and a l-ampere fuse for
any of 110V, 117V, or I30V operation. lfthe rating of the
fuse is proper, install the fuse on the fuse cap.

ruse can ruse ms: FLIIG socxn

m. at! m. a... up by Imntrlw n with .
coin. ck u. in. autumn mamuu by or.
allow mm

REPLACING 0F FUSE
When the fuse is blown off, remove the fuse cap and replace
the fuse with a new one.

cow

Fig. 1.