Sanyo TRC-2050-C Service manual

FILE NO.

Service Manual

Compact Cassette Recorder

TRC-2050C

(XE)
(US)

Contents

Tape adjustments ............................................................1

Exploded view .................................................................. 2

Parts list ...........................................................................3

Wiring connection ............................................................4

Schematic diagram

(AMPLIFIER).................................................................6

Wiring diagram

(SWITCH)......................................................................5

(AMPLIFIER).................................................................8

PRODUCT CODE No.
164 100 00(XE)
164 100 01(US)

REFERENCE No.

SM5810410

TAPE ADJUSTMENTS

a. Adjusting Azimuth

• Be sure to clean the heads before attempting to make any adjustment.

• Be sure both channel's waveform are the same for the phase matching.

• Be sure both channels (1 and 2) are the same level using a dual-channel oscilloscope.

• After completion of the adjustment, apply the threadlock (TB-1401B) to the azimuth adjustment screws to fix them securely.

(1) Load an azimuth adjustment test tape (VTT-703 etc., 10 kHz)

in tape deck.
(2) Press the PLAY button.
(3) Use a cross-tip screwdriver to turn the screw for azimuth

adjustment so that the left and right outputs are maximized.
(4) Press the STOP button.

HEAD AZIMUTH ADJUSTMENT

PLAY

b. Replacing the Head

• After replacing the head, demagnetize the head by using a

degausser.

• All wiring should be returned to the original position after work is

completed.

c. Adjusting Tape Speed

• Use a plastic screwdriver for adjustment.
(1) Inset the test tape (TCC-119 etc., 3000 Hz).
(2) Press the PLAY button.
(3) Use a flat-tip screwdriver to turn the VR403 to adjust so that

the frequency counter becomes 3000 Hz.

TAPE SPEED CONTROL

TAPE PLAY SPEED

SLOW NOR FAST

R / P HEAD

WHITE

WHITE

MOTOR SPEED
ADJUSTMENT

BLACK

GRAY

2.4 4.8
SPEED

d. Checking the Mechanism Torques

• Clean the head, capstan and pinch roller before making any measurement.

Measurement Take-up torque Back tension Tape tension

Cassette for PLAY : TW-2111A

measurement F.FWD / REW : TW-2231 TW-2412

PLAY 23~50 gr.cm 1.0~5.0 gr.cm 30 gr or more

F.FWD 55 gr.cm more --- ---

REW 55 gr.cm more --- ---

PLAY : TW-2111A

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Drive-power cassette

EXPLODED VIEW

1

CABINET & CHASSIS

3

2

11

4

5

6

71

7

16

14

17

12

15

18

TM2050CTN-SH

19

Y02

20

8

9

10

13

TM1

Y01

TAPE MECHANISM
TM2050CTN-SH

TM2

TM5

TM3

Y01

TM4

27

21

72

24

22

23

Y03

25

26

Y04

Y04

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