Sanyo dc d7u

Page 1

Service Manual

MINI SHELF SYSTEM

sin/Miro

FlLE NO. Exist}?
DC-D7 (US)

Specifications

TUNER SECTION
Frequency range FM : 87.9 - 107.9 MHZ
(200 kHz steps)

FM : 23.3 dBf (mono)
AM : 520 - 1,710 kHz

(10 kHz steps)

Usable sensitivity
Frequency range

Sensitivity .......... AM ; 500 yV/m (AM Loop antenna)
ASSETTE DECK SECTION
{rack system ....... 4 track stereo, 2 channel stereo

Frequency response . . 80 Hz - 13,500 Hz
Signal to noise ratio . . 50 dB

Wow & Flutter ...... 0,15 % (WRMS)
Tape speed ........ 1-7/8 ips. (4.75 cm/sec)
Fast forward and
rewind time Approx. 110 sec. (0-60)
CD PLAYER SECTION
Channels .......... 2 channel stereo
Sampling frequency 44.1 kHz
Digital filter ......... 2 x Oversampling
D/A converter ....... Dual 16-bit linear D/A converters
Pick-up ............ Optical 3-beam semiconductor laser
Frequency response . . 20 Hz - 20,000 Hz
Signal to noise ratio , . 90 dB
Wow & Flutter ...... Below measurable limits

Specifications subject to change without notice.
This service manual consists of "DC-D7U"( main unit ),
"RB-05" ( remote control ) and "SX-D7" ( speaker system ).

PRODUCT CODE No.
129 452 00

AMPLIFIER SECTION

Continuous minimum sine wave RMS power output

per channel at 1 kHz into 4 ohms with no more than

10% total harmonic distortion.......5 Watts

input sensitivity and

impedance ......... AUXNIDEO 300 mV/50 kohms
Graphic equalizer control 1 6 dB (300 Hz. 1 kHz. 10 kHz)

Bassxpander ....... + 6 dB ( 100 Hz )
GENERAL

Power requirements . , AC : 120 V, 60 Hz

Power consumption . . 35 W

Dimensions (WxHxD) . Approx. 10.6" x 11.3 x 8.5"
Weight ............ Approx. 8.6 lbs.

RB-D5 WIRELESS REMOTE CONTROL
Power requirements 2 "AA batteries
Dimentions (WXHXD) Approx. 1,6 x 6,9" x 0.7

Weight ............ Approx. 3 oz. (without batteries)
SX-D7 SPEAKER SYSTEM

Type .............. 2 way bass reflex

Unit used .......... Woofer: 4.7 cone type

Tweeter : 0.8 piezoelectric
Maximum power-handling capacity 10 W (peak)
Nominal impedance 4 ohms
Dimensions (WxHxD) . Approx. 7.1 x 11.3" x 75"
Weight ............ Approx. 3 lbs. (per speaker)

REFERENCE No. SM580375

Page 2

CD PLAYER MECHANISM ADJUSTMENTS

a. INSTALLING THE DISC TRAY

(1) Turn the pick-up sled gear (13) in the direction of the
arrow. (CD)

(2) Align the disc tray with the mechanism chassis,

(3) While pressing down on the disc tray. check that the tray
move gear (3) and disc tray interlock, as shown in the
figure. (®)

(4) After the disc tray has been housed, place the screw at the
back left screw of the disc tray. (®)

b. DISASSEMBLV OF THE CD PLAYER MECHANISM
(a) Replacement of the spindle motor

0 First. prepare the new turntable (50 - 2 ) and new special
washer ( 50 - 4 ) for replacement.

The removed turntable will be deformed by the heat of
the soldering iron, and cannot be reused.

0 Prepare dial-type calipers.

(1) The attached bonding material can be dissolved by using
a 60W soldering iron to heat the shaft at the upper part
of the turntable for about one minute.

(2) The turntable can then be removed from the shaft by very
carefully applying force upward at the center of the lower
surface of the turntable.

(3) Remove the two screws ( 50 - 5 ) and remove the spindle
motor (50 - 3).

(4) Attach the special washer ( 50 - 4 ) to the spindle motor.

(5) Clean the spindle motors shaft.

To clean them, use a soft cloth soaked in isopropyl alcohol.

(6) Apply a small amount of a mixture of the Three Bond
2001 and 2015F bonding materials to the motors shaft.

(7) Install the turntable as shown in the figure,

(8) Secure the turntable by pressing gently.
Be sure to wipe away (by using a piece of cloth. or similar
material) any bonding material coming out of the hole.

PICK-UP SLED GEAR (13)

TRAV MOVE GEAR(3)

Dont attached bonding material at the top of shaft.
. Bonding material

I

(SO-A)
(SPECIAL WASHER)

(50-1)
(CHASSIS)

:52;
[as

SHAFT

Be sure to wipe away the
bonding material

CHUCK PULLEV