Pioneer RX-P840 User Manual

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The
chapter
1
of
this
Service
Manual
will
not
be
reprinted.
On
your
additional
orders,
we
may
supply
only
the
chapter
2.
For
the
chapter
1,
please
make
copies
and
attach
to
the
chapter
2
at
your
side
if
necessary.
STEREO CASSETTE DECK RECEIVER
RX-P840
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
5 The voltage can be converted by the
Tape RX —P840 Power Roauseinent following method.
AC110V/120—127V/220V/240V
With
the
voltage
selector
VU
HB @ AC240V AC230V, *
KU oO AC120V _—
Ke
3
AGI20V
Sa
%*:
Alter
the
wiring
of
the
Power-supply
block
at
the
primary
winding
of
Power
transformer
referring
to
the
“Line
Voltage
Selection”
described
in
Service
Manual.
@ This product is a system(s) component.
This
product
does
not
function
properly
when
independent;
to
avoid
malfunctions,
be
sure
to
connect
it
to
the
prescribed
system
component(s),
otherwise
damage
may
result.
CONTENTS
CHAPTER 1 CHAPTER 2
1.1
SAFETY
INFORMATION
--------2
1-2
2.1
PACKING
AND
EXPLODED
VIEWS
--
2-3
1.2
SPECIFICATIONS
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1-3
2.2
SCHEMATIC
AND
PCB
CONNECTION
1.3
PANEL
FACILITIES
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—-4
DIAGRAMS
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1.4
DISASSEMBLY
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2.3
BLOCK
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1.6 FL INFORMATION Beas e ede sea veet cenaeeues 1 —_ 10
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1.8 PARTS LIST FOR PACKING AND
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PIONEER ELECTRONIC CORPORATION = 4-1, Meguro 1-Chome, Meguro-ku. Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760. Long Beach. California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham, Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER
ELECTRONICS
AUSTRALIA
PTY.
LTD.
178-184
Boundary
Road,
Braeside,
Victoria
3195,
Australia
TEL:
[03]
580-9911
YZ
24
©
PIONEER
ELECTRONIC
CORPORATION
1994
T—DFF
MAY
1994.
Printed
in
Japan

Pioneer RX-P840 Specifications

General

Brand	Pioneer
Model	RX-P840
Category	Cassette Player
Language	English

Summary

CHAPTER 1

1.1 SAFETY INFORMATION

General safety instructions for qualified technicians and warnings regarding lead.

1.2 SPECIFICATIONS

Technical specifications for Amplifier, Tuner, and Cassette Deck sections.

1.3 PANEL FACILITIES

Identification and description of front panel controls and indicators on the main unit.

REMOTE CONTROL UNIT

Detailed explanation of the remote control unit's buttons and functions.

1.4 DISASSEMBLY

Step-by-step instructions for disassembling the main unit and its sections.

1.5 IC INFORMATION

Pin assignments and block diagrams for the PD4523A IC.

1.6 FL INFORMATION

Pin assignments and grid layout for the FL display.

1.7 ADJUSTMENT

Procedures for adjusting FM and AM tuner sections.

Handling Precautions

Safety precautions for the Power Amp Module Assy.

Adjustment and Confirmation of Idle Current

Procedure to measure and adjust idle current in the power amplifier.

Adjusting the Operating Temperature Setting of the Fan Motor

Procedure to adjust the fan motor speed based on temperature.

CASSETTE DECK SECTION

Overview of cassette deck adjustments and test points.

Mechanical Adjustment

Steps for tape speed adjustment.

Tape Speed Adjustment

Procedure for adjusting the tape playback speed.

Electrical Adjustment

Preparation and procedures for electrical adjustments.

Playback Adjustment

Head azimuth and playback level adjustments.

Head Azimuth Adjustment

How to adjust head azimuth for tape playback.

Playback Level Adjustment

How to adjust playback level for tape playback.

Recording Adjustment

Bias oscillation, recording level, and frequency response adjustments.

Bias Oscillation Frequency Adjustment

Procedure for adjusting bias oscillation frequency.

Recording Level Adjustment

Procedure for adjusting recording level.

Recording/playback Frequency Characteristics Adjustment

Adjusting frequency response for recording/playback.

ALC Operation Check

Checking the Automatic Level Control operation.

1.8 PARTS LIST FOR PACKING AND EXPLODED VIEWS

Lists parts for packing and exploded views, detailing differences between models.

(1). PACKING

Exploded view of packing and accessories.

(2). EXTERIOR

Lists exterior parts and their part numbers, noting model variations.

(3). POWER MOD. F100 (FOR ALL TYPES)

Lists parts for the Power Mod. F100, applicable to all types.

(4). CASSETTE MOD. BC (FOR ALL TYPES)

Lists cassette mecha parts for all types.

(5). REMOTE CONTROL UNIT (CU-RX025) (HB TYPE)

Lists parts for the remote control unit specific to HB type.

1.9 PCB PARTS LIST

Lists PCB assemblies and their part numbers by model.

LIST OF WHOLE PCB ASSEMBLIES

Lists all available PCB assemblies and their corresponding part numbers.

CONTRAST OF PCB ASSEMBLIES

Details differences in PCB assemblies for specific models.

MAIN ASSY

Lists parts for the Main Assy, noting model variations.

PRIMARY ASSY

Lists parts for the Primary Assy, noting model variations.

DISPLAY ASSY

Lists parts for the Display Assy, noting model variations.

FM/AM TUNER MODULE

Lists parts for the FM/AM Tuner Module, noting model variations.

VOL ASSY

Lists parts for the Vol Assy, noting model variations.

CHAPTER 2

2.1 PACKING AND EXPLODED VIEWS

Exploded views and parts lists for packing.

2.2 SCHEMATIC AND PCB CONNECTION DIAGRAMS

Schematic diagrams and PCB connection layouts.

2.3 BLOCK DIAGRAM

System block diagram illustrating signal flow.