Sony CMT-EP707 / HCD-EP707 Service Manual ▷ View online
HCD-EP707
11
3-10. COVER
2
cover
1
two screws
1
two screws
HCD-EP707
12
3-11. DRAWER
lever (slider-2)
1
Slide the lever (slider-2)
in the direction of arrow
in the direction of arrow
A
,
at the full.
2
Slide the lever (slider-2)
in the direction of arrow
in the direction of arrow
B
,
at the full.
3
front
-bottom view-
rear
lever (slider-2)
lever (slider-2)
A
B
6
drawer
4
Push the drawer
in the dirrection of arrow
in the dirrection of arrow
C
,
and remove two claws.
5
Push the drawer
in the dirrection of arrow
in the dirrection of arrow
D
,
and remove two claws.
C
D
HCD-EP707
13
3-12. BELT (GRAY/BLACK)
1
belt (gray)
2
belt (black)
7
flexible cable
8
two cushions
qa
optical block
9
two cushions
0
cushion
1
two screws
2
arm
3
carriage
6
5
four washers
4
four screws
3-13. OPTICAL BLOCK
HCD-EP707
14
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function: TUNER
TUNER/BAND switch: AM
Function: TUNER
TUNER/BAND switch: AM
[FM]
Setting:
Function: TUNER
TUNER/BAND switch: FM
Function: TUNER
TUNER/BAND switch: FM
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
32
Ω
SPEAKER JACK board
SPEAKER terminal (SP801)
SPEAKER terminal (SP801)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
deviation by 400 Hz
signal
Output level: as low as possible
+
–
–
level meter
set
32
Ω
0.01
µ
F
MAIN board
TP (FM ANT)
TP (FM ANT)
MAIN board
TP (GND)
TP (GND)
SPEAKER JACK board
SPEAKER terminal (SP801)
SPEAKER terminal (SP801)
digital voltmeter
100 k
Ω
MAIN board
TP (VT)
TP (GND)
SECTION 4
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Setting:
Function: TAPE
Function: TAPE
Procedure:
1. Playback WS-48B (tape center) in the FWD state.
2. Adjsut the volume in CAPSTAN/REEL motor so that the fre-
1. Playback WS-48B (tape center) in the FWD state.
2. Adjsut the volume in CAPSTAN/REEL motor so that the fre-
quency counter reading becomes 3,000 Hz.
Specified Value: 2,910 to 3,090 Hz
3. Confirm that the frequency at the beginning and that at the
end of tape winding are between 2,955 to 3,045 Hz.
Adjustment Location:
PRECAUTION
1. Setting
MEGA BASS switch : OFF
TAPE DECK SECTION
0 dB=0.775 V
Test tape
Type
Signal
Used for
WS-48B
3 kHz, 0 dB
Tape Speed Adjustment
frequency counter
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
set
SPEAKER JACK board
SPEAKER terminal (SP801)
SPEAKER terminal (SP801)
–
+
47 k
Ω
CAPSTAN/REEL
motor
motor
Tape Speed
Adjustment
Adjustment
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)
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