Sanyo dcda 1200 m service manual

Page 1

Service Manual

Micro Component System

SIM/O

FILE NO.

DC-DA1200M (XE-2)
DC-DA1250M (SP-2)

0 ©©©i

l I=l I= I=l

(XE)

Contents

Laser beam safety precaution
Tape adjustments
Tuner adjustments ..
CD pick-up maintenance
Exploded view ................
Parts list ....................................
IC block diagram & description .
Schematic diagram

(FRONT) ..

(CD) .........

r -. - -. - - - - -. -
I This servnce manual conSIsts of

Wiring diagram

[=IIIIIIII

(SEQ I
©

(SP)

PRODUCT CODE No.
129 694 13 (XE-2)
129 694 16 (SP-2)

(TUNER) ..........
(AMPLIFIER)

(FRONT & CD)
(KEY) ...............
(TUNER) ..........
(AMPLIFIER)
(POWER TRANSFORMER) ..

Wiring connection ............................................................ 29

________________ _|

For XE-2 ; "DC-DA1200MU/XE-2" (Main unit I 129 693 13) and " SX-DA12OOM/XE" (Speaker system: 165 104 04) I
LFor SP-2 ; "DC-DA1250MU/SP-2" (Main unit : 129 693 16) and "SX-DA1250M/SP" (Speaker system: 165 045 15) _|

REFERENCE No. SM5810658

Page 2

LASER BEAM SAFETY PRECAUTION

- Pick-up that emits a laser beam is used in this CD player section.

CAUTION :

LASER OUTPUT
WAVELENGTH

THIS PRODUCT CONTAINS A LOW POWER LASER DEVICE,
TO ENSURE CONTINUED SAFETY DO NOT REMOVE ANY
COVERS OR ATTEMPT TO GAIN ACCESS TO THE INSIDE
OF THE PRODUCT.

REFER ALL SERVICING TO QUALIFIED PERSONNEL.

0.6 mW Max. (CW)
790 nm

CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL- USYNLIG LASER STRALING VED ABNING, NAR
SIKKERHEDSAFERVDERE ER UDE AF FUNKTION, UNDGA UDS ETIELSE
FOR STRALING.

VARNINO -O_SYNLIG LASER STRALNING NAR DENNA DEL AR OPPNAD
OCH SPARR AR URKOPPLAD. STRALEN AR FARLIG.

VORSICHT -__UNS|CHTBARE LASERSTRAHLUNG TRITT AUS, WENN
DECKEL GEOFFNET UND WENN SICHERHEITSVERRIEGELUNG
UEERBRUCKT IST. NICHT, DEM STRAHL AUSSETZEN.

who -_AVATTA_ESSA JA SUOgALUKITUS ORITETIAESSA OLET ALI'TIINA
NAKYMATIOMALLE LASERSATEILYLLE. ALA KATSO SATEESEEN.

IIIIIIIIIII

TAPE ADJUSTMENTS
a. Replacing the head

eLAss t LASER PRODUCT
mu

IIIIIIIII
IIIIIIIII

I

3mm:
14 :2 mm

c. Adjusting motor speed

1.

After replacement, demagnetize the heads by using
a degausser.

Be sure to clean the heads before attempting to make
any adjustments.

Be sure both channels (1 and 2) are the same level.

(Using a dual-channels oscilloscope).

All wiring should be returned to the original position d.

after work is completed.

Ft/P HEAD
RED WHITE
T:l

I
\

YELLOW EARTH

b. Adjusting head azimuth

Load a test tape (VTT-738, etc. :10kHz) for

Use a cross-tip screwdriver to turn the screw for
normal azimuth adjustment so that the left and right
outputs are maximized at the same phase during

1.
azimuth adjustment.
2. Press the PLAY button.
3.
normal playback.
4. Press the STOP button.

1. Insert the test tape (MTT-111 or etc. 3.000 H2).

2. Press the PLAY button.

3. Use a flat-tip screwdriver to turn the SVR to adjust so
that the frequency counter becomes 3,000 Hz.

4. Press the STOP button.

Replacing the motor

MOTOR SPEED
ADJ USTMENT

e. Checking the mechanism torques

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

Measurement Take-up torque Back tension Tape tension
Cassette Ior PLAY : TW-21 1 1A PLAY : TW-21 1 1A Drive-power cassette
measurement F.FWD/REW : TW-2231 TW-2412
PLAY 30 ~ 709mm 1.0 ~ 6.Dgr.cm 80 gr or more
F.FWD/REW 55 gr or more