Pioneer f 757 service manual

Page 1

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ORDER NO.
ARP2019

FM/AM DIGITAL SYNTHESIZER TUNER

F-757

MODEL F-757 HAS FOLLOWING VERSIONS:

Type Power requiremem Export deninnrion
HEWZI ACZZOV, 240V (switchable) West Germany and Italy
HE AC220V. 240V (switchable) European continent
HB ACZZDV, 240V (switchable) " Unired Kingdom

* Change the primary wiring of the power transformer.

o This manual is applicable to the F-757/HEWZI, HE and HB types.

0 As to the HE and HB types, refer to page 33.

0 Ce manual pour le service comprand les explications de réglage en frangais.
o Este manual de servicio trata del método aiuste escrito en espafiol.

CONTENTS

1. PANEL FACILITIES .................................................... 2
2. EXPLODED VIEWS, PAKING AND

PARTS LIST
3. SCHEMATIC D
4. P.C. BOARDS CONNECTION DIAGRAM ..
5. P.C.B'S PARTS LIST .........................................

6. ADJUSTMENTS..
REGLAGE.
AJUSTE....

7. IC INFORMA IO

8. FOR HE AND HB TYPES

9. SPECIFICATIONS ...............

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1«Chome. Meguro-ku, Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE INC. R0. Box 1760, Long Beach, California 90801 U.S.A.

PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Drive, Markham, Ontano L3H 8E3 Canada

PIONEER ELECTRONIC [EUROPE] N.V. KeetbergIaan 1. 2740 Beveven. Belgium .

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside. VICtoria 3195, Australia TEL: [03] 580-9811

© PIONEER ELECTRONIC CORPORATION 1990

FV APR. 1990 Primed in Japan

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1. PANEL FACILITIES

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@ POWER (STANDBY/ON) switch/indicator
When the power is on, indicator lights.
ON ............... When setto ON position, power is supplied and the unit

becomes operational

When set to STANDBY position, the main power flow

is out and the unit is no longer fully operational. A
minute flow of power feeds the unit to maintain

0 The memory will be backed up so long as the power cord is not

I If the powercord is unplugged, the memory wri/ be retained for several

STANDBY .....
operation readiness.
NOTE:
unplugged
days.
® SSS button/indicator

When SSS is on, indicator lights. It turned on during reception of AM
or when MPX MODE is set to MONO during FM, this will produce a
simulated stereo effect which provides rich ambiance.

SSS: Spectrum Simulated Stereo.
NOTE:

This bumm's status is preset for each station in station memory.

® ANT AIB button

Selects between two antennas connected to the FM antenna A and

5 terminals. ANT A or ANT B indicator lights up.

NO TE:

This buttans status is preset for each station in station memory.

69 RF ATT button

Set this switch to ON when receiving strong FM signals (nearby stations)
to reduce sound distortion (IRF ATT] indicator lightsl.
Normally, this switch should be set to OFF,

NO TE:

This buttans status is preset for each stat/an in station memory,

® BAND selector buttons
FM:
Press to receive FM broadcasts
AM:
Press to receive AM broadcasts.

lF BAND button
Each time this button is pressed the bandwidth of the IF circuit switches
between "normal" and super narrow" Ior the FM band and the AM

band.
The selected bandwidth is displayed as follows:

The NORMAL or SUPER NARROW indicator lights up.

Set to SUPER NARROW in case of interference from other stations.

N0 TE:
The setting of this button is memonzed together with the stau'on in the
station memory.

® MEMORY button

Press to memorize preset stations. The- indicator will remain
lit for several seconds. Press the desired STATION CALL buttons to
memorize it during this period.

.TUNING UPIDOWN buttons

Use these buttons to tune in broadcasting stations. Press UP 1 +1 to
receive a station whose frequency is higher than the displayed
frequency, and DOWN (-) to tune into a lower frequency station.

@STATION CALL buttons

Use these buttons to preset stations and to receive already preset
stations.