Sony TC-K370 Service Manual

TC-K370/RX370
SERVICE MANUAL
AEP Model
UK Model
Australian Model
TC-K370
US Model
Canadian Model
AEP Model
TC-RX370
Photo: TC-K370
* Dolby noise reduction and HX Pro headroom extension manufactured
under license from Dolby Laboratories Licensing Corporation. HX Pro
originated by Bang & Olufsen.
“DOLBY”, the double-D symbol OO and “HX PRO” are trademarks of Dolby
Laboratories Licensing Corporation.
Model Name Using TC-W370/W41 1
Similar Mechanism /WR511/WR570
TC-K370 | TCM-190VB12C
TC-RX370 | TCM-190RB12C
SPECIFICATIONS Tape Transport
Mechanism Type
4-track 2-channel stereo
Approx. 90 sec. (with Sony C-60
Recording system
Fast-winding time
Outputs
Line outputs Rated output level] 0.32 V ata load
cassette)
(phono
jacks)
impedance
of
Bias
AC
bias
47
k
ohms
Motors
Capstan
motor
x
1
(DC
motor)
Load impedance | Over 10 k ohms
Headphones 0.3 mW at a load
(stereo phone impedance of
jack) 32 ohms
Reel motor x 1 (DC motor)
Signal-to-noise ratio (at peak level)
Dolby NR switch OFF B-Type | C-Type
Cassette ON ON
Output level
General
Type | (Sony HF-S)
| Type lV (Sony METAL-SLT) | 58dB | 66dB | 73dB
Type |! (Sony UX-S) 57dB | 65dB
5a | oae | 7008.
Total harmonic distortion
1% (with Sony METAL-SLT cassette)
Frequency response (DOLBY NR OFF)
Type IV cassette
(Sony METAL-SLT)
| (Sony HF-S)
Wow and flutter
Inputs
recording]
Type Il cassette
30 - 15,000 Hz (+3 dB, IEC)
(Sony UX-S)
Type | cassette 30 - 14,000 Hz (+3 dB, IEC)
30 - 15,000 Hz (+3 dB, IEC)
30 - 13,000 Hz [+3 dB, OVU (-4 dB)
socal
40.13% W. Peak (IEC)
0.07% WRMS (NAB)
+0.18% W. Peak (DIN)
_ Line inputs
(phono jacks)
77.5 mV
input impedance | 47 k ohms
Sensitivity
Power requirements
Power consumption
Dimensions
Weight
US, Canadian model :120V AC, 60Hz
AEP, Germany, Australian model:
220-230V AC, (or 240V AC adjustable
by Sony personnel) 50 /60Hz
UK model :240V ‘AC, (or 220V AC adjustable
by Sony personnel) 50/60Hz
20 W
Approx. 430 x 123 x 287 mm (w/h/d)
(17 x 4% x 113% inches)
including projecting parts and controls
Approx. 3.9 kg (8 Ibs 10 02)
Supplied accessory Audio connecting cords (2)
Design and specifications subject to change without notice.
STEREO CASSETTE DECK
ONY.

Sony TC-K370 Specifications

General

Type	Cassette Deck
Track System	4-track, 2-channel stereo
Heads	1 x record/playback, 1 x erase
Motor	DC Servo Motor
Frequency Response (Metal tape)	20 Hz - 20 kHz
Wow and Flutter (WRMS)	0.04%
Outputs	1 x Line, 1 x Headphones
Tape Type	CrO2, Metal
Frequency Response	20 Hz - 20 kHz (Metal Tape)
Wow and Flutter	0.07%
Input	Line In
Output	Line Out
Inputs	1 x Line
Dimensions	430 x 125 x 310mm

Summary

Specifications

Recording and Output Specifications

General and Input Specifications

Safety Check-Out Procedures

AC Leakage Test

Procedures and methods for testing AC leakage from metal parts to earth ground.

Safety-Related Component Warnings

Identifies critical components for safety and replacement guidelines.

Section 2: Disassembly Procedures

Case and Front Panel Removal

Mechanism Deck and Component Views

Section 3: Adjustments

Mechanical Adjustments

Procedures for mechanical adjustments like torque measurement and head alignment.

Electrical Adjustments

Procedures for electrical adjustments like playback level and tape speed.

Phase and Playback Level Adjustments

Procedures for phase checking and adjusting playback signal levels.

Tape Speed Adjustment

Procedure for setting the correct tape speed for normal and high-speed modes.

Bias and Record Level Adjustments

Procedures for adjusting bias consumption current and record levels.

Record Bias Adjustment

Procedure for adjusting the bias level for optimal recording.