Pioneer ctf 1250 owners manual

Page 1

CASSETTE TAPE DECK

T-F'IEED

OPERATING INSTRUCTIONS

KU
KC

GDPIONEEW

Before operating your CT-FlZSO CASSETTE TAPE
DECK, please read these Operating Instructions
through and then you will know how to connect the
tape deck properly and operate the tape deck cor-
rectly. This will ensure that you enjoy the stereo
performance to the full.

After reading these instructions, keep them in a safe
place together with the warranty card. Then you will
know exactly where it is in case you wish to refer to it.

CONTENTS

Features ........................... 2
Precautions ......................... 3
Front Panel Facilities ................. 4
Connections ........................ 7
Basic Operations ..................... 8
Cassette Tapes ...................... 9
How to use the Tape Calibration ........ 10
Playback ........................... 1 2
Repeat Playback Function ............. 13
Recording .......................... 14
Microphone Recording ................ 16
Maintenance ........................ 16
Operations with the Timer ............. 17
The Dolby NR System ................ 18
Specifications ....................... 19
Troubleshooting ..................... 20
Schematic Diagram .............. Insertion
Leading Brands of Tapes ......... Insertion

IMPORTANT NOTICE
The serial number for this equipment is located on the
rear panel. Please write this serial number on your
enclosed warranty card and keep in a secure area. This
is for your security.

WARNING: TO PREVENT FIRE 0R SHOCK
HAZARD, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.

Page 2

FEATU RES

Tape calibration system

Even if you are using the same type of tape, the charac-
teristics vary slightly from tape to tape. With Pioneers pre-
vious tape decks, the reference bias and equalizer values
have been fixed by a uniform standard tape, and it has not
been possible to cope with slight differences even by chang-
ing the position of the tape selector. This deck, however,
adopts the tape calibration system which detects the opti-
mum bias, equalizer and recording/playback level (sensi-
tivity) and which adjusts the recording circuit so as to
obtain a flat frequency response up to the highest fre-
quency range limit with the minimum of distortion for each
and every tape.

Dual capstan system with direct drive using a
quartz PLL brushless DC servomotor

The quartz PLL (phase-locked loop) system serves to com-
pare the output waveforms of the frequency generator,
which is incorporated into the capstan motor rotor, with
the waveforms from the high-precision reference oscillator
which uses a quartz crystal, and thereby controls the rota-
tional speed of the motor. This system features superior
time, and temperature drift and load resistance character-
istics and it always ensures a constant rotational speed.

This feature goes hand in hand with the closed-loop dual
capstan system, whereby a capstan is placed on both sides
of the heads, to eliminate level fluctuations and sound
variations caused by irregularities in the cassette tape and
also to provide stable tape travel.

Three-head system with Uni-crystal combination
head

In order to do full justice not only to metal tapes but also
to chrome and ferrichrome tapes, a uni-crystal recording]
playback combination head is employed. In addition, the
erase head features superior temperature characteristics in
order that the most is made of the metal tapes properties.
This combination improves the input/output character
lstics, the distortion and the frequency response and also
provides a superlative signal-to-noise ratio. The recording
and playback heads are amalgamated into a single packaged
combination head so that the quality ofa recording can be
checked at the flip of a switch.

Feather-touch tape function buttons using LSI
logic control circuitry .

The adoption of single-paCkaged lC logic control circuitry
makes it possible to select the tape travel in a smooth
feather-touch operation. Even when switching from the fast
forward or rewind mode to the playback mode, the tape is
not damaged in any way and the switchover is both direct
and speedy. Another big feature is the LSI-stored program
which deals with faulty operation and duplicated depressing
of the function buttons and which puts the tape automati-
cally through the stop mode when necessary during switch»
over.

Digital bar-graph fluorescent display meter
The level meter features ail-electronic digital control and
bar-graph fluorescent display tubes. The length of the bars
are made to correspond to the strength of the signals sup-
plied both for the left and right channels in parallel. This
makes it easy to set the recording level accurately.

4-digit tape counter

The tape counter is all-electronic thanks to a built-in IC
which detects the rotation of the reel base in pulses and
displays them on the 4-digit fluorescent display tube.

3-stage meter selector switch

The meter selector switch performs a triple function. It can
be used to display the average signal strength of a program
source on the florescan meter, the peak level for approxi-
mately two seconds or the peak hold value (by holding the
maximum value on the display). This handy mechanism
allows the recording level to be set easily in accordance
with the content of the program source which is to be re-
corded.

Repeat playback, memory stop, memory play
functions

A total of six programs are stored in the LSI logic circuitry.
Memory stop involves bringing the tape back automatically
to the position where the tape counter was set to 0000",
memory play entails the automatic playback of the tape
from the stop position, and repeat playback involves repeat-
ing play from the start of the tape automatically or from
the place on the tape where the counter was set to 0000
during playback after rewinding to that position. All these
programs are stored in the LSI.