KENWOOD DP-SG7G Service Manual

Cover page of KENWOOD DP-SG7G Service Manual

Service Manual for KENWOOD DP-SG7G, downloadable as a PDF file.

Manual details

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  • Delivered as a PDF file.
  • The manual has 14 pages
  • File size: 1.99 MB
  • Available language versions: English
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Sample pages

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COMPACT DISC PLAYER
DP-SG7/SG7G
SERVICE MANUAL
© 1999-7/B51-5542-00 (K/K) 2299
70%
6
0
repeat
7
¢
4
1
time
space
compact disc player
D.R.I.V.E.with 24bit D/A converter
on/standby
24bit Fine D.R.I.V.E.
'
603
616
617
651
606
604
650
OPTICAL
SYSTEM
CONTROL
DIGITAL OUT
PLAY OUT
R
L
AC power cord *
(E30-)
Oscillating module
(W02-1114-05)
Phono jack
(E63-0122-05)
Metallic cabinet
(A01-3313-01)
Power cord bushing
(J42-0083-05)
Rectangular receptacle
(E08-0312-05)
Illustration is DP-SG7.
* Refer to parts list on page 15.
In compliance with Federal Regulations, following are repro-
ductions of labels on, or inside the product relating to laser
product safety.
KENWOOD-Crop. certifies this equipment conforms to
DHHS Regulations No. 21 DFR 1040. 10, Chapter 1, Sub-
chapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM
Refer to DP-SE7 service manual (B51-5371-00),
if require the circuit description.
Indicator
(B12-0318-04)
Panel
(A60-1671-03)
Panel
(A29-1058-03)
Knob (POWER)
(K29-6741-04)
Front glass
(B10-2372-03)
Knob
(K29-7571-03)
SUB panel
(A22-1778-31)
background image
COMPACT DISC PLAYER
DP-SG7/SG7G
SERVICE MANUAL
© 1999-7/B51-5542-00 (K/K) 2299
70%
6
0
repeat
7
¢
4
1
time
space
compact disc player
D.R.I.V.E.with 24bit D/A converter
on/standby
24bit Fine D.R.I.V.E.
'
603
616
617
651
606
604
650
OPTICAL
SYSTEM
CONTROL
DIGITAL OUT
PLAY OUT
R
L
AC power cord *
(E30-)
Oscillating module
(W02-1114-05)
Phono jack
(E63-0122-05)
Metallic cabinet
(A01-3313-01)
Power cord bushing
(J42-0083-05)
Rectangular receptacle
(E08-0312-05)
Illustration is DP-SG7.
* Refer to parts list on page 15.
In compliance with Federal Regulations, following are repro-
ductions of labels on, or inside the product relating to laser
product safety.
KENWOOD-Crop. certifies this equipment conforms to
DHHS Regulations No. 21 DFR 1040. 10, Chapter 1, Sub-
chapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM
Refer to DP-SE7 service manual (B51-5371-00),
if require the circuit description.
Indicator
(B12-0318-04)
Panel
(A60-1671-03)
Panel
(A29-1058-03)
Knob (POWER)
(K29-6741-04)
Front glass
(B10-2372-03)
Knob
(K29-7571-03)
SUB panel
(A22-1778-31)
background image
DP-SG7/SG7G
2
CONTENTS / CAUTIONS
CONTENTS / CAUTIONS .......................................... 2
DISASSEMBLY FOR REPAIR....................................3
ADJUSTMENT ............................................................4
PC BOARD ................................................................ 5
SCHEMATIC DIAGRAM ............................................ 7
EXPLODED VIEW ....................................................13
PARTS LIST..............................................................15
SPECIFICATIONS ......................................Back cover
Contents
Operation to reset
The microcomputer may fall into malfunction (impos-
sibility to operate, erroneous display, etc.) when the
power cord is unplugged while power is ON or due
to an external factor. In this case, execute the follow-
ing procedure to reset the microcomputer and return
it to normal condition.
DP-SG7
Pull the power plug from the receptacle, and then
plug it in again.
÷ Please note that resetting the microcomputer clears
the contents stored in it returns it to condition when it
left the factory.
Cautions
background image
DP-SG7/SG7G
3
DISASSEMBLY FOR REPAIR
How to open tray if not comes out.
1. Insert screwdriver to hole on bottom plate and turn screw
clockwisely about 100° (
1).
2. Pull tray out by hand if tray comes out (
2).
background image
DP-SG7/SG7G
4
ADJUSTMENT
FIG.
VC
CN3
L.P.F.
+
+
L.P.F.
VTVM
VTVM
1
2
3
4
5
6
7
1.2 kHz
50 mVrms
RF
FE1
FE2
VC
TE2
TE1
S.S
+
_
(a)
No.
ITEM
INPUT
SETTINGS
OUTPUT
SETTINGS
ALIGNMENT
POINTS
ALIGN
FOR
PLAYER
SETTINGS
1
LASER POWER
-
Apply the sensor section
of optical power meter
on the pickup lens.
-
On the power from
0.08 to 0.15 mW,
when the diffraction
grating is correctly
aligned with the RF
level of 0.6 Vp-p or
more.
Press the
PLAY/PAUSE key,
then confirm that the
LED is "03".
ALIGNMENT POINTS
Pickup
3
FOCUS ERROR
BIAS
Test disc
Type 4
Connect an oscilloscope
as follows.
CH1 : RF (CN3 pin 1)
CH2 : TE (CN3 pin 6)
FE BIAS
VR2
Optimum eye pattern
Press the
PLAY/PAUSE key,
then confirm that the
LED is "05".
Note:
Type 4 disc : SONY YEDS-18 Test Disc or equivalent.(KTD-0V)
LPF: Around 47 k
+ 390 pF or so.
Step 1~4 are in Test Mode.
0.08
0.15 mW
Optical power meter
2
TRACKING ERROR
BALANCE
Test disc
Type 4
Connect an oscilloscope
as follows.
CH1 : RF (CN3 pin 1)
CH2 : TE (CN3 pin 6)
TE BALANCE
VR1
Symmetry between
upper and lower pat-
terns
Press the
PLAY/PAUSE key,
then confirm that the
LED is "03".
(e)
4
TRACKING GAIN
Test disc
Type 4
Apply signal of
1.2 kHz,
50mVrms to
CN3 pin 5-6.
Connect a LPF to CN3
pin 5-6 to which you
connect an oscilloscope
or AC voltmeters.
TRACKING
GAIN
VR3
Two VTVMs should
read the same value.
Press the
PLAY/PAUSE key,
then confirm that the
LED is "05".
While pressing the "REPEAT" key, turn the AC ON.
{ Refer to test mode (MODE 0 0) }
(e) Tracking gain
(a) Laser power
T-GAIN
VR3
VR1
VR2
CN1
TE-B
FE-B
background image
ACE
G
I
BD
F
H
J
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD(Component side view)
5
6
CD PLAYER UNIT
(X32-3600-00)
ELECTRIC UNIT
(X25-6100-01)
DISPLA
Y
UNIT
(X14-4760-21)

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