Sony TC-K222ESA - Service Manual

SERVICE MANUAL
steray
IC-
K808kS
AEP Model
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol DJ are trademarks of
Dolby Laboratories Licensing Corporation.
TC-K222ESA/
Model
Name
Using
Similar
Mechanism
TC-K890ES
TCM-200014
SPECIFICATIONS
Recording system
Fast winding time
Bias
Heads
Motors
4-track 2-channel stereo
Approx. 90 sec. (with Sony C-60 cassette)
AC bias
Erasing head x 1 (S&F head)
Recording head x 1 (SD head)
Playback head x 1 (SD head)
Capstan motor x 1 (direct drive linear torque
BSL motor)
Reel motor x 1 (DC motor)
Assist (mechanism drive) motor x 1 (DC
motor)
Signal-to-noise ratio (at peak level and weighted)
Cassette
(Dolby NR off) |
Type IV | Type II | Type |
Wow and flutter
+ 0.05% W.Peak (IEC)
0.025% W.RMS (NAB)
+ 0.07% W.Peak (DIN)
Inputs
Line
inputs
Sensitivity
0.16V
(phono
jacks)
|
Input
impedance
47
k
ohms
Outputs
Line outputs
(phono jacks)
Rated output level 0.5 V at a load impedance
of 47 k ohms
Load impedance Over 10 k ohms
| 59 dB | 57 dB
S/N ratio improvement (approximate values)
With Dolby B NR on: 5 dB at 1 KHz; 10 dB at 5 kHz
With Dolby C NR on: 15 dB at 500 Hz; 20 dB at 1 kHz
With Dolby S NR on: 10 dB at 100 Hz; 24 dB at 1 kHz
Harmonic distortion
0.4% (with Type |, 160 nWb/m, 315 Hz,
3rd H.D.)
1.5% (with Type IV, 250 nWb/m, 315 Hz,
3rd H.D.)
Frequency response (Dolby NR off)
Type IV cassette
20 - 21,000 Hz (+3 dB, IEC)
20 - 16,000 Hz [+3 dB (-4 dB recording)]
Type !I cassette
20 - 19,000 Hz (+3 dB, IEC)
Type | cassette
20 - 17,000 Hz (+3 dB, IEC)
Type IV : Sony METAL-S or ES-IV
Type Il : Sony UX-S or UX
Type! : Sony HF-S
MICROFILM
Headphones
(stereo phone jack)
0-3 mW ata load
Output level
impedance of 32 ohms
General
Power requirements
Power consumption
Dimensions
Mass
Supplied accessories
220 - 230 V AC, 50/60 Hz
26 W
Approx. 470 x 135 x 350 mm (w/h/d)
including projecting parts and controls
Approx. 8.0 kg (17 Ibs 11 0z)
Audio connecting cords (2)
M3x8 screws (4)
Design and specifications are subject to change without notice.
STEREO CASSETTE DECK
SONYY.

Summary

Specifications

GENERAL

Identifying Front Panel Components

Lists and identifies all controls, switches, and indicators on the front panel of the device.

DISASSEMBLY

Cassette Holder and Ornamental Plate

Details the procedure for removing the cassette holder and ornamental plate during disassembly.

Pinch Lever and FR2 Lever Removal

Outlines the steps for disassembling the pinch lever and FR2 lever mechanisms.

Comparator, Capstan, Flywheel, and FG Board Disassembly

Procedures for disassembling the comparator, capstan, flywheel, and FG boards.

MD and Reel Motor Board Disassembly

Steps for the disassembly of the MD board and the reel motor board.

MECHANICAL ADJUSTMENTS

Tape Passing Adjustment

Procedure for ensuring correct tape path during playback for optimal performance.

Head Alignment Adjustments

Adjustments for record/playback and erase heads for precise tape head contact.

Pinch Roller Adjustment

Procedure for adjusting the pinch roller to ensure proper tape tension and movement.

Adjustment Locations and Checks

Diagrams showing adjustment points and final checks for mechanical adjustments.

ELECTRICAL ADJUSTMENTS

Speed, Filter, and Torque Checks

Procedures for checking tape speed, MPX filter, and torque specifications.

Level Specifications and Adjustments

Details input/output levels and associated adjustments for playback and recording.

Head Azimuth and Erase Current Adjustments

Adjusting head azimuth and erase current for optimal audio signal playback.

Bias and Calibration Procedures

Procedures for bias, metal bias, and calibration adjustments for recording quality.

DIAGRAMS

IC Pin Assignments

Details the pin configurations and functions for key integrated circuits used in the device.

Semiconductor Lead Layouts

Diagrams illustrating the physical pinouts for various transistors and ICs.

Circuit Board Locations

Illustrations showing the physical placement of all internal circuit boards within the unit.

Block Diagram

High-level overview of the system's signal flow and interconnections between major modules.

Printed Wiring Boards

Layouts of the printed wiring traces for the audio sections of the circuit boards.

Schematic Diagrams

Detailed electronic circuit schematics for the audio and Dolby S sections.

EXPLODED VIEWS

Panel Section Exploded View

Exploded view showing the front panel components and their assembly order.

Chassis Section Exploded View

Exploded view illustrating the main chassis and major internal assemblies.

Mechanism Section Exploded Views

Detailed exploded views of the tape transport mechanism and its parts.

ELECTRICAL PARTS LIST

Sony TC-K222ESA Specifications

General

Track System	4-track, 2-channel stereo
Weight	5.5 kg
Type	Stereo Cassette Deck
Heads	1 x Record/Playback, 1 x Erase
Frequency Response	20 Hz - 20 kHz
Input	Line In, Mic In
Output	Line Out, Headphones
Tape Speed	4.76 cm/s
Dimensions	430 x 125 x 290 mm (W x H x D)