DOWNLOAD Sony CMT-DC1 / HCD-DC1 Service Manual ↓ Size: 4.66 MB | Pages: 51 in PDF or view online for FREE

Model
CMT-DC1 HCD-DC1
Pages
51
Size
4.66 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-dc1-hcd-dc1.pdf
Date

Sony CMT-DC1 / HCD-DC1 Service Manual ▷ View online

HCD-DC1
10
3-6.
CD  MECHANISM  DECK (CDM55F-K6BD41A)
3-7.
BASE  UNIT (BU-K6BD41A)
3
screw
(BVTP3 
×
 8)
4
CD mechanism deck
(CDM55F-K6BD41A)
2
connector
(CN401)
1
flexible flat cable (19core)
(CN101)
1
floating screw
(PTPWHM2.6)
2
base unit
(BU-K6BD41A)
HCD-DC1
11
3-8.
LOADING  MOTOR  BOARD
3-9.
CAM (CDM55)
2
belt (CDM55)
B
3
Pull the tray pushing 
B
.
4
two screws
(BTP2.6 
×
 6)
5
LOADING MOTOR board
1
Rotate the gear(B) in
the direction of arrow 
A
.
A
2
lever (SW)
1
torsion spring
6
gear (B)
3
spacer (55)
4
pulley (LDG)
5
gear (A)
7
roller
8
cam (CDM55)
HCD-DC1
12
SECTION  4
TEST  MODE
Start
REC pause for 3 seconds
FWD REC
Fast forward
REV Play
REC pause for 3 seconds
REV REC
Rewind
FWD Play
Shut off
Shut off
Shut off
Shut off
1 minute
3 minutes
1 minute
3 minutes
Start
Open the disc tray
Close the disc tray
Play the last track
[Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Turn ON the power.
2. Press three buttons
x
(TAPE), 
x
(CD), and
[TUNER/BAND]
 simultaneously.
3. The set is reset.
[Liquid Crystal Display All Lit Check Mode]
Procedure:
1.
Set to standby state.
2.
Press three buttons of
x
(TAPE),
x
 (CD), and
[FUNCTION]
 simultaneously.
3.
Liquid crystal display are all turned on.
4.
To exit from this mode, press the
I/1
button to turn the power
OFF.
[Tape Deck Aging Mode]
This mode can be used for operation check of tape deck section.
Procedure:
1.
Set a tape in the tape deck.
2.
Set to standby state.
3.
Press three buttons of
x
(TAPE),
x
 (CD), and 
[+]
 (TUNING)
simultaneously.
4.
The aging is executed in bellow sequence.
5.
To exit from the aging mode, press the
I/1
button to turn the
power OFF.
Aging mode sequence:
[CD Aging Mode]
This mode can be used for operation check of CD section.
Procedure:
1.
Load a CD disc.
2.
Set to standby state.
3.
Press three buttons of
x
(TAPE),
x
(CD), and 
[--]
 ( TUNING)
simultaneously.
4.
The aging is executed in bellow sequence.
5.
To exit from the aging mode, press the
I/1
button to turn the
power OFF.
Aging mode sequence:
HCD-DC1
13
Note:
Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.
1.
Demagnetize the record/playback head with a head
demagnetizer.
2.
Do not use a magnetized screwdriver for the adjustments.
3.
After the adjustments, apply suitable locking compound to the
parts adjust.
4.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5.
The adjustments should be performed in the order given in this
service manual.  (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6.
The adjustments should be performed for both L-CH and R-
CH.
7.
Switches and controls should be set as follows unless otherwise
specified.
• Test Tape
Record/Playback Head Azimuth Adjustment
Procedure:
1.
Mode:  Playback
SECTION  5
ELECTRICAL  ADJUSTMENT
2.
Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
3.
Mode: Playback
4.
Repeat step 1 to 3 in playback (REV) mode.
5.
After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location:
0 dB=0.775 V
DECK  SECTION
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
set
MAIN board
SPEAKER terminals (SJ301)
L-CH, R-CH
+
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
Screw
position
L-CH
peak
within
1 dB
Output
level
L-CH
peak
R-CH
peak
within
1 dB
Screw
position
R-CH
peak
set
test tape
P-4-A100
(10 kHz, –10 dB)
R-CH
oscilloscope
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
MAIN board
SPEAKER terminals (SJ301)
L-CH
forward
reverse
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