Onkyo TA-2820 Service Manual

WY23741)
Ref. No. 3393
ONKYO SERVICE MANUAL
STEREO CASSETTE
TAPE DECK
MODEL TA-2820
Black model
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 4 ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COM-
PONENTS WITH ONKYO PARTS WHOSE PARTS
NUMBERS APPEAR AS SHOWN IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT
EXPOSED PARTS ARE ACCEPTABLY IN-
SULATED FROM THE SUPPLY CIRCUIT BEFORE
RETURNING THE APPLIANCE TO THE
CUSTOMER.
ONKYO.
AUDIO COMPONENTS
SPECIFICATIONS
Track Format: 4-tracks, 2-channels
Erasing System: AC erase
Tape Speed: 4.8 cm/sec. (1-7/8 i.p.s.)
Wow and Flutter: 0.07% (WRMS)
Frequency Response:
S/N Ratio:
Input Jacks:
Outputs:
Motors:
Heads:
Power Supply Rating:
Power Consumption:
Dimensions:
Weight:
20 —-17,000Hz (Normal)
(30—16,000Hz + 3dB)
20 —18,000Hz (High)
(30~17,000Hz + 3dB)
20—19,000Hz (Metal)
(30—18,000Hz + 3dB)
58dB (metal tape, Dolby NR off)
A noise reduction of 10dB above 5kHz
and 5dB at 1kHz is possible with Dolby B
NR. A noise reduction of 20dB at 5kHz is
possible with Dolby C NR.
Line IN: 2
Input sensitivity: 30mV
Input impedance: 50kohms
Like OUT: 2
Standard output level: 500mV (OdB)
Optimum load impedance: over
50 kohms
Headphone jack: 1
Optimum load impedance: 8 to 200
ohms
DC servo motor: 1
DC motor: 1
REC/PB: Special Hard Permalloy x 1;
Erase head: Ferrite x 1
AC 230V, 50Hz
16 watts
455(W) x 120(H) x 308(D)mm
(17-15/16" x 4-3/4" x 12-1/8)
5.0kg. (11.0 Ibs.)
Specifications and external appearance are subject to change
without notice because of product improvements.

Onkyo TA-2820 Specifications

General

Brand	Onkyo
Model	TA-2820
Category	Tape Deck
Language	English

Summary

Safety Component Warning

Specifications

IC Block Diagrams

HA12142NT (Dolby NR) IC Diagram

Pin configuration and block diagram for the Dolby NR IC.

µPC1297CA (HX PRO) IC Diagram

Pin configuration and block diagram for the HX PRO IC.

Meter Drive and Display ICs

M62302P (Meter Drive) IC

Circuit diagram and functions of the meter drive IC.

BG-924GK (Display Tube) Diagram

Explains the display tube segments and peak level indicators.

Microcomputer

HD614049SA88/SB03 Microcomputer

Pinout and peripheral connections for the microcomputer.

Adjustment Procedures

Tape Speed Calibration

Head Azimuth and Playback Level Calibration

Steps for aligning the playback head and setting its level.

Bias and Record Level Calibration

Procedures for optimizing bias current and record level.

PC Board Parts Lists

NAAR-4165-1 PC Board Components

NADIS-4166-1 PC Board Components

Schematic Diagram 1/2

Schematic Diagram 2/2