Sony TC-K808ES 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.

Sony TC-K808ES Specifications

General

Track System	4-track, 2-channel stereo
Type	Cassette Deck
Motor	DC servo motor
Tape Type	Type I, Metal
Frequency Response	20Hz to 20kHz (Metal tape)
Input	Line Level, Microphone
Output	Line Level
Tape Speed	4.76 cm/s
Heads	3 (1 x combination record/playback, 1 x erase)

Summary

General

Identifying the Parts

Identifies components and controls on the front panel of the cassette deck.

Mechanical Adjustments

Tape Passing Adjustment

Adjusting tape path for optimal playback and recording.

Pinch Roller (S Side) Adjustment

Erase Heads Adjustment

Electrical Adjustments

Tape Speed and WOW Check

Procedures to measure and verify tape speed and wow/flutter.

Record/Playback Head Azimuth Adjustment

Aligning heads for correct stereo phase and channel separation.

Playback Level Adjustment

Adjusting output levels for playback to specified standards.

Erase Current Adjustment

Bias Consumption Current Adjustment

Metal Bias Adjustment

Calibration and Level Meter Adjustment

Calibrating internal circuits and adjusting level meter response.

Diagrams

Block Diagram

Schematic Diagram - AUDIO Section

Detailed circuit schematic for the audio sections of the deck.

Schematic Diagram - SYSTEM CONTROL Section

Detailed circuit schematic for the system control sections.

Schematic Diagram - DOLBY S Section

Detailed circuit schematic for the Dolby S decoder circuitry.