Onkyo TA-2200 - User Manual

ONKYO SERVICE MANUAL
TA-2200
SERIAL NO. 3326
STEREO CASSETTE
TAPE DECK
MODEL TA-2200
Black model
| UDUD® |
120V AC , 60Hz
UG ia 220V AC, 50Hz
UW
120 or 220V AC, 50/60Hz
UQA.UOB | 240V AC. 50Hz
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK “~ 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.
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)
ONKYO.
AUDIO
COMPONENTS
Frequency Response: 20—17,000Hz (Normal)
(30—16,000Hz +3dB)
20—18,000Hz (High)
(30—17,000Hz +3dB}
20—19,000Hz (Metal)
(30—18,000Hz +3dB)
S/N Ratio: 58dB (metal tape, Dolby NR off)
A noise reduction of 10dB above 5kHz
and 5dB at 1kHz is possible with Dolby B
NR. A noisy reduction of 20dB at 5kHz is
possible with Dolby C NR.
Input Jacks: Line IN: 2
Input sensitivity: G(OmV
input impedance: 50kohms
Outputs: Line OUT: 2
Standard output level: 5}00mV (OdB)
Optimum load impedance: over
50 kohms
Headphone jack: 1
Optimum load impedance: 8 to 200
ohms
Motors: DC servo motor: 1
DC motor: 1
Heads: REC/PB: Special Hard Permalloy x 1;
Erase head: Ferrite x 1
Power Supply Rating: U.K. and Australian models:
AC 240V, 50Hz
U.S.A. and Canadian models:
AC 120V, 60Hz
Worldwide models:
AC 120V and 220V switchable, 50/60Hz
Power Consumption: 19 watts
Dimensions: 435 (W) x 122(H) x 262(D) mm
(17-1/8" x 4-13/16” x 10-15/16")
Weight: 4.4 kg. (9.7 Ibs.)
RC-146T Remote Control Transmitter
(U.S.A. and Canadian models only)
Transmitter: infrared
Signal Range: Approx. 5 meters (16 feet)
Power Supply: Two AAA batteries
Dimensions: 38(W) x 150(H) x 15.3(D) mm
(1-1/2” x 5-7/8" x 5/8”)
Weight: 62 grams (2.2 oz.) (including batteries)
Specifications and external appearance are subject to change
without notice because of product improvements.

Summary

SPECIFICATIONS

General Specifications

Details on tape format, speed, wow/flutter, motors, heads, and power details.

Performance Metrics

Frequency response, S/N ratio, and input/output characteristics.

Remote Control Details

Specifications for the RC-146T remote control transmitter.

SAFETY WARNINGS

SERVICE PROCEDURES

Power Cord Replacement

Instructions for safely replacing the power supply cord.

Insulating Resistance Test

Procedure for measuring insulating resistance.

HX PRO CIRCUIT OPERATION

Recording Bias and Frequency

Explains recording frequency response with bias.

Basic HX PRO Functionality

Describes the fundamental operation of the HX PRO circuit.

HX PRO Operating Conditions

Details the conditions under which HX PRO operates.

HX PRO BLOCK DIAGRAM

OVERALL BLOCK DIAGRAM

IC BLOCK DIAGRAMS

Playback Amplifier IC (NCHC-3205)

Block diagram for the Playback Amplifier IC.

Dolby Noise Reduction IC (CX20187)

Block diagram for the Dolby Noise Reduction IC.

Meter Drive IC (BA6810 S)

Block diagram for the Meter Drive IC.

Motor Drive IC (TA-7291 S)

Block diagram for the Motor Drive IC.

DISPLAY TUBE SPECIFICATIONS

PIN CONNECTION GUIDE

PACKAGING DETAILS

Packing View

Visual representation of the product packaging.

Packing Part List

List of parts included in the product packaging.

MICRO COMPUTER PIN FUNCTIONS

MICRO COMPUTER TERMINAL FUNCTIONS

REPEAT MODES AND AMCS

Full Repeat Operation

Explains the operation of the Full Repeat function.

Block Repeat Operation

Details the Block Repeat function and its parameters.

AMCS Music Selection

Describes the Auto Music Cassette Selection function.

ADJUSTMENT PROCEDURES

Pre-Adjustment Precautions

Essential precautions before performing adjustments.

Adjustment Table

Lists items, connections, tests, and adjustment points.

TEST EQUIPMENT AND SETUPS

Oscilloscope Connections

Setup for using an oscilloscope for measurements.

Test Setup Diagrams

Diagrams illustrating test connections and phase relationships.

CHASSIS EXPLODED PARTS LIST

CHASSIS EXPLODED VIEW DIAGRAM

TAPE MECHANISM PARTS LIST

PC BOARD PARTS LIST

ADDITIONAL PC BOARD COMPONENTS

CONTROL SECTION SCHEMATIC DIAGRAM

AUDIO SECTION SCHEMATIC DIAGRAM

TAPE MECHANISM EXPLODED VIEW DIAGRAM

Overview

1. Function Description
2. Usage Features
3. Repeat Functions
4. Maintenance Features

The Onkyo TA-2200 is a stereo cassette tape deck designed for high-fidelity audio recording and playback. This manual provides comprehensive details on its operation, maintenance, and internal components, ensuring users can maximize its performance and longevity.

Function Description

The TA-2200 is a 4-track, 2-channel stereo cassette deck featuring an AC erase system and a tape speed of 4.8 cm/sec (1-7/8 i.p.s.). Its core functionality revolves around recording and playing back audio on standard cassette tapes. A key feature is the HX PRO circuit, which enhances recording frequency characteristics and bias control. This circuit, utilizing the µPC1297CA IC, dynamically adjusts the recording bias current to maintain optimal frequency response, particularly in the high-frequency range. When the recording signal's time constant (frequency) and level exceed certain thresholds, the VCA (Voltage Controlled Amplifier) reduces the bias current, thereby boosting the high-frequency region. This intelligent bias control ensures that the audio signal is processed instantaneously, resulting in superior recording quality.

The deck incorporates Dolby B and Dolby C Noise Reduction systems, significantly improving the signal-to-noise ratio. Dolby B provides a noise reduction of 10dB above 5kHz and 5dB at 1kHz, while Dolby C offers a more substantial 20dB reduction at 5kHz. These systems are crucial for minimizing tape hiss and other unwanted noise, delivering cleaner and more dynamic audio.

For user interaction, the TA-2200 includes a microcomputer (HD-614048SJ49) that manages various functions. This microcomputer handles inputs from keys such as FF, REW, PAUSE, REC, PLAY, AMCS, AUTO SPACE, STOP, and COUNTER RESET. It also controls outputs for FL tube displays (REC FL, PLAY FL, PAUSE FL, HIGH FL, NORMAL FL, METAL FL, GRID, and SEGMENT displays), line muting, record muting, record/playback selection, bias oscillator control, reel motor rotation (FF and REW directions), solenoid triggering, and capstan motor ON/OFF.

The deck features multiple input and output options, including Line IN, Line OUT, and a Headphone jack. The input sensitivity for Line IN is 60mV with an impedance of 50kohms. Line OUT provides a standard output level of 500mV (0dB) with an optimum load impedance of over 50kohms. The Headphone jack is designed for an optimum load impedance of 8 to 200 ohms.

Usage Features

The TA-2200 offers several advanced playback and recording features to enhance the user experience.

Repeat Functions:

• FULL REPEAT: This function allows five consecutive plays of one full side of the tape. Once activated, if the end of the tape is sensed during PLAY or rewind, the machine automatically enters this mode. The latest completed play is considered the first, and the tape will be played four more times. The PAUSE function does not affect the repeat count.
• BLOCK REPEAT: This enables five consecutive plays of a user-defined section between two selected points. The starting point is set when the BLOCK REPEAT function is switched ON or when the PLAY button is depressed. If PLAY is pressed multiple times, the last press defines the starting point. For reverse decks, if the tape end is sensed before the return point, the mechanism reverses, and that point becomes the new play starting point. The return point is set by pressing REW during F-PLAY or FF during R-PLAY. For one-way decks, if the tape end is sensed before the return point is set, the tape end itself becomes the return point. Similar to FULL REPEAT, PAUSE does not interrupt the operation. However, activating any other function during BLOCK REPEAT terminates it. The operation stops after the fifth repeat. A note advises that if the BLOCK REPEAT section is too short, the return point should be moved to allow sufficient length.

AMCS (Automatic Music Control System): This feature facilitates music selection by putting the mechanism into CUE condition. It monitors signals entering the SEARCH SIGNAL terminal to detect the start of music. Once detected, it plays the music for approximately ten seconds, with the PLAY display flashing at 1Hz. After ten seconds, the machine moves to the next music selection. The system detects gaps between music pieces by converting to normal play time, considering a nominal 5 seconds or actual 2.5 seconds or more as a non-recorded gap.

Remote Control: The TA-2200 supports remote control functionality with the RC-146T Remote Control Transmitter (for U.S.A. and Canadian models only). This infrared transmitter has a signal range of approximately 5 meters (16 feet) and is powered by two AAA batteries, offering convenient control over the deck's operations from a distance.

Display Tube: The BG-654G display tube provides visual feedback on various operational parameters, including counter readings, Dolby NR status, operation mode, tape selector (METAL, HIGH, NORM), and peak level meters for both left and right channels. This comprehensive display keeps the user informed about the deck's status.

Maintenance Features

The manual emphasizes several crucial maintenance procedures to ensure the TA-2200's optimal performance and safety.

Safety-Related Component Warning: Components marked with a specific symbol on the schematic diagram and in the parts list are critical for fire and electric shock risk. It is imperative to replace these components only with genuine Onkyo parts whose part numbers are specified in the manual. Additionally, leakage-current or resistance measurements must be performed to confirm that exposed parts are adequately insulated from the supply circuit before returning the appliance to the customer.

Power Supply Cord Replacement: The manual details the correct insertion direction for power supply cords into the strain relief. For AS-UC-3 (UD<120V> model), the cord should be inserted lengthwise, while other types of cords should be inserted horizontally to ensure safety.

Insulating Resistance Measurement: To verify electrical safety, the insulating resistance between the power supply cord plug and the chassis must be measured using an insulating-resistance tester. The specification requires more than 10MΩ at 500V.

Adjustment Procedures: Before performing any adjustments, it is critical to clean specific parts with an alcohol-moistened swab. These parts include the record/playback head, pinch roller, erase head, and capstan. It is also essential to demagnetize the record/playback head using a head demagnetizer and to avoid using magnetized screwdrivers for adjustments.

The manual outlines detailed adjustment procedures for various parameters:

• Tape Speed: Adjusted by connecting a frequency counter to the LINE output terminal and setting it to 3000±20Hz using the semi-fixed control on the motor with an MTT-111 test tape in PB mode.
• Head Azimuth: Adjusted using an AC voltmeter and oscilloscope connected to the LINE output terminal. The head azimuth screw is turned to achieve maximum and same phase at both left and right channels with a VTT-658 test tape in PB mode.
• Playback Level: Adjusted by connecting an AC voltmeter to terminals TP-3 and TP-4. R107 (Ch.L) and R108 (Ch.R) are adjusted to 245mV with an MTT-150 test tape in PB mode.
• OSC Block: The frequency counter is connected to P401 (read loose coupling), and L-407 is adjusted to 85kHz ± 2kHz with a METAL TAPE MX-C60 in REC mode.
• HX-PRO: An AC voltmeter is connected to terminals TP-1 and TP-2. L-405 (Ch.L) and L-406 (Ch.R) are adjusted to maximum with a METAL TAPE in REC mode. R439 and R440 are adjusted to maximum clockwise.
• Bias Current: With an AC voltmeter connected, R439 (Ch.L) and R440 (Ch.R) are adjusted to achieve the same level at REC/PB with 1KHz, -20dB and 12kHz, -20dB signals using an XL-II C-90 tape. Input VR should be at maximum.
• Record Level: An AC voltmeter is connected, and R401 (Ch.L) and R402 (Ch.R) are adjusted to achieve the same level at REC/PB with a 1kHz signal using an XL-II C-90 tape. The attenuator or AF OSC output should be 350mV.

These detailed instructions ensure that the TA-2200 can be precisely calibrated and maintained to deliver consistent, high-quality audio performance throughout its lifespan.

Onkyo TA-2200 Specifications