Sony tc k 850 es service manual

Page 1

SERVICE MANUAL

US Model

Canadian Model

UK Model

West Germany Model

TC-K85OES
E Model
TC>K222ESG
TC- K850ES
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
"D0 LBY" and the double-D symbol DU are trademarks of
Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism New
Tape Transport Mechanism Tyne TCM-2OOD2
SPECIFICATIONS
Recording system 4-track 2-channel stereo Outputs

Bias AC bias

Heads Erase head x1 (5 & F head)
Recording head x1 (Permailoy head)
Playback head X1 (LA head)

Motors capstan motor x1
(direct drive linear torque BSL motor)

Line outputs
(phono jacks)

Rated output level 0.44 V (-5 dB) at a
load impedance
47k ohms

Wow and llutter

Reel motorxt (DC motor)
DC motorx 1
0.024% WRMS (NAB), 10.0$5% (DIN)

Fasttorward and rewind time

Approx 90 sec. (with 060 cassette)

Frequency response (DOLBY NR OFH

TYPE IV cassette
(Sony METALES)

15-21,000 HZ (13 dB, DIN)
15- 16,000 Hz (OVU recording)

TYPE li cassette

15-19000 HZ (:3 dB, DIN)

(Sony UXS)
TYPE I cassette 15-11000 Hz (:3 dB. DIN)
(Sony HF-S)

Signal-to~noise ratio (at peak level)

Dolby NR switch OFF BvTYPE C-TVPE
Cassette ON ON
(r3125: ET/(MS) 61 as 70 as 76 dB
TYPE Il (Sony UXS) 59 dB 68 dB 74 dB
TYPE l (Sony HF-S) 57 dB 66 dB 72 d8

Total harmonic distortion

10% (with Sony METAL-ES cassette)

Load impedance

Over 10k ohms

Headphones
(stereo phone jack)

Output level

0-2.5 rnW at a load

impedance of 32
ohms

General
Power requirements

Power consumption
Dimensions

Weight

West Germany model:
220 V Actor 240 V AC adjustable
by Sony personnel), 50/60 Hz
S. Canadian model:
120 V AC, 60 H2
UK model:
240 V AC (or 220 V AC adjustable
by Sony personnel), 50/60 Hz
E model:
120. 220, or 240 V AC adjustable,
50/60 Hz
23 W
Approx, 430 x 135 x 350 mm (wlh/d)
(17 x 53/, x 137. inches)
Approx, 470 x 135 x 350 mm (Wlhld)*
(18/2X5/.X 137/. inches)
Approx 69 kg (15 lbs 4 oz)
Approx. 7.9 kg (17 lbs 7 oz)

* including protecting parts. controls and wooden side panels

Supplied accessory
Optional accessory

Audio connecting cord (2)
Wireless remote control unit Flt/H701

Inputs
Line inputs Sensitivity 775 NW (-20 dB)
(phone jacks) Input impedance 50k ohms

CD DIRECT input
(phone jacks)

Design and specifications subject to change without notice.

Note
This appliance conforms wnh EEC Directive 87/308IEEC regarding
interference suppression.

STEREll CASSETTE DECK
ONE

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TC- K222ESG/K850ES i

TABLE OF CONTENTS

Section Title Page
SPECIFICATIONS ----------- 1
MODEL IDENTIFICATION 3
SAFETY CHECK-OUT ~~~~~~ 3
1. GENERAL ......................................... 4
2. DISASSEMBLY-- 5
3. ADJUSTMENTS
3-1. Mechanical Adjustments ~ 7
3-2. Electrical Adjustments'w ~~~~~~~~~~~ 10
4. DIAGRAMS
4- 1. Block Diagram ............................. 15
4-2. Semiconductor Lead Layouts ~~~~~~~~~~~~~~ 17
4-3. Circuit Boards Location ~ ~~~~~~~~~~ 18
4-4. IC Block Diagrams~~~ . 18
4-5. Printed Wiring Boards
_ Main Section - .......................... 20
4-6. Schematic Diagram
~Main Section- .......................... 25
4-7. Schematic Diagram
-Panel section~ .......................... 30
4-8. Printed Wiring Boards
_ Panel Section _ .......................... 33
5. EXPLODED VIEWS
5.1. Overall Section ............................. 35
5-2. Panel Section .............................. 36
5-3. Mechanism Section (1) ~~~~~~~~~~~~~~~~ 37
5-4. Mechanism Section (2) ~~~~~~~~~~~~~~~~~ 38
6. ELECTRICAL PARTS LIST ....................... 22

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A DR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND W THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LlSHED BY SONY.

Flexible Circuit Board Repairing

- Keep the temperature of the soldering iron around
270C during repairing.

Do not touch the soldering iron on the same conductor
of the circuit board (within 3 times).

- Be careful not to apply force on the conductor when
soldering or unsoldering.

Notes on chip component replacement

0 Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum capacitor may
be damaged by heat.

Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang &
Olufsen.

Operating voltage -

Before connecting the unit to the power source, check
that the operating voltage of your unit is the same as the
local power supply.

If your model has a voltage selector on the rear panel
and it must be reset, disconnect the AC power cord
and set the selector to the appropriate voltage.

65 VOLTAGE selector

ATTENTION AU.COMPOSANT AYANT RAPPORT
A LA secumrer

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sun LES DIAGRAMMES SCHEMATIOUES ET LA LlsTE
DES PIECES sour CRITIOUES POUR LA sécuniré
DE FONCTIONNEMENT. NE REMPLACER css COM-
vosmst ous PAR DES PIECES souv pom LES
numénos sour DONNES DANS c: MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR sonv.