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Yamaha K-200 Service Manual

Yamaha K-200
23 pages
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/*\
STEREO
CASSETTE
DECK
SERVICE
MANUAL
FRONT
PANEL
©
Power
Switch
(POWER)
Eject
Button
(EJECT)
©
Cassette
Holder
©
Tape
Counter/Reset
Button
(TAPE
COUNTER/RESET)
©
Rewind
Button
(
«
)
©
Play
Button
(
>
)
©
Fast-Forward
Button
(
W>
)
©
Stop
Button
(
)
'?•
Record-Standby/Pause
Button
(R
EC/PAUSE)
Record-Muting
Button
(MUTE)
S
VU
Level
Meters
(LEVEL)
©
Tape
Selector
Switches
(TAPE)
Q
Dolby
NR
Switch
(DOLBY
NR)
J
Headphone
Jack
(PHONES)
^
Microphone
Jacks
(MIC)
Record
Level
Control
(REC
LEVEL)
C
ONTENTS
Rear
Panel.
Names
of
the
Parts.
Disassembly
Instructions
.
General
Adjustments.
Specifications
....
Block
Diagram
....
..
Performance
Chart
for
Mechanism
Logic...
Printed
Circuit
Board
Pattern-side
Layout.
Printed
Circuit
Board
Parts-side
Components
Layout/Wiring
Schematic
Diagram.
.
.
.
....
1
..
2
.
3
.
4
.
7
..
.
7
...
8
..
.
10
..
.
.
.
11
..
.
.
.
12
SINCE
1887
H
YAMUHA
NIPPON
GAKKI
CO.,
LTD.
HAMAMATSU.
JAPAN
Printed
in
Japan
5.82
erj
<&)
2
.
65K
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Yamaha K-200 Specifications

General IconGeneral
Track System4-track, 2-channel stereo
Tape Speed4.76 cm/s
Heads1 x record/playback, 1 x erase
TypeCassette Deck
Inputs1 x line
OutputsLine Out (RCA), Headphone (6.3mm)
Signal to Noise Ratio (Dolby B)66dB (dolby B)
Signal-to-Noise Ratio (Dolby B On)66dB (dolby B)

Summary

Front Panel Controls and Indicators

Front Panel Layout Overview

Identifies key controls and indicators on the front panel of the cassette deck.

Rear Panel Connections and Ports

Audio Input and Output Jacks

Connects audio sources for recording and outputs for playback.

Power Cord Connection

Details the power cord connection for mains supply.

Internal Component Identification - Top View

Labeled Components in Top View

Identifies numbered parts such as transformers, motors, and circuit boards from the top.

Service Access: Disassembly Procedures

Initial Cover Removal

Steps for removing the top and bottom covers of the unit.

Front Panel and Mechanism Removal

Procedures for detaching the front panel and transport mechanism.

Internal Component Removal

Instructions for removing VU meters and circuit boards.

General Adjustments: Playback Calibration

Tape Speed and Playback Level Adjustment

Calibrating tape speed and setting playback signal levels.

Playback Adjustments: Azimuth and Frequency Response

Head Azimuth Adjustment

Aligning the R/P head for optimal audio output.

Playback Frequency Response Check

Verifying frequency response accuracy during playback.

Recording Adjustments: Calibration and Checks

Level Meter and Record Level Calibration

Adjusting VU meters and recording input levels.

Recording Bias Current Check

Verifying bias current for optimal recording quality.

Recording Adjustments: Tape Type Optimization

Tape Type Specific Response Adjustments

Optimizing recording performance for CrO2, LH, and Metal tapes.

Location of Adjustment Points Diagram

Diagram showing locations of adjustment potentiometers.

Technical Specifications

Performance and Electrical Specifications

Details on tape speed, frequency response, SNR, input/output levels.

Physical Dimensions and Power

Unit size, weight, power supply details, and model variations.

System Block Diagram

Signal Path Overview

Illustrates the flow of audio signals through the unit's circuitry.

Mechanism Operation Logic - Part 1

Forward and Record Mode Logic

Flowchart detailing logic for FWD and REC button operations.

Mechanism Operation Logic - Part 2

FF, REW, and FF/REW Mode Logic

Flowchart detailing logic for FF, REW, and FF/REW modes.

Schematic Diagrams and Component Identification

Main Circuit Schematic Diagram

Detailed electronic schematic of the main circuit board.

Component Type Overview

Lists common transistors, ICs, diodes, and other component types.

Detailed Schematic Circuit Sections

Record Amplifier and Dolby Sections

Schematics for record amp, EQ, and Dolby processing circuits.

Power Supply and Control Block

Diagrams for power supply and control logic circuits.

Printed Circuit Board Layouts

Pattern-Side Trace Layouts

Diagrams showing copper trace patterns on the main circuit boards.

Printed Circuit Board Component Layouts

Parts-Side Component Placement

Diagrams showing component placement and wiring on PCBs.

Parts List Overview and Notes

Parts List Organization

Information on how the parts list is structured.

Destination Abbreviations

Key for country codes used in market designations.

Exploded View - Overall Assembly

All-Component Assembly Diagram

Visual representation of all major parts and their assembly.

All-Component Parts List

Component Identification and Details

List of all parts with numbers, descriptions, and remarks.

Market and Model Specific Part Data

Data on part variations based on market and model.

Exploded View - Mechanism Section

Mechanism Assembly Diagram

Exploded view diagram of the tape transport mechanism.

Mechanism Components Parts List

Mechanism Part Numbers and Descriptions

List of parts specific to the tape transport mechanism.

Circuit Board Parts List - Capacitors

Capacitor Part Numbers and Values

Detailed list of capacitors used on the circuit boards.

Circuit Board Parts List - Capacitors and Resistors

Capacitor and Resistor Listings

Further details on capacitors and resistors for circuit boards.

Circuit Board Parts List - Resistors

Resistor Identification and Values

List of resistors with part numbers and resistance values.

Circuit Board Parts List - Active Components

Transistors, Diodes, and ICs

List of semiconductor components used on the circuit boards.

Switches and Variable Resistors

List of switches and potentiometers for control and adjustment.

Circuit Board Parts List - Connectors and Accessories

Fuses, Jacks, and Terminals

List of fuses, audio jacks, and connection terminals.

Holders, Solenoids, and System Accessories

List of component holders, solenoids, and system accessories.

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