Sony CFD-E55 Service Manual ▷ View online
– 13 –
CASSETTE LID ASSY AND CASSETTE HOLDER
HEAD (HRP301), MOTOR ASSY (M301) AND BELT
7
spring
(cassette)
(cassette)
8
boss
8
boss
3
two screws
(BVTP3
(BVTP3
×
10)
4
speaker (R ch)
1
two screws
(BVTP3
(BVTP3
×
10)
2
bracket (SP)
(TYPE A, B, C)
(TYPE A, B, C)
2
bracket (SP)
(TYPE D)
(TYPE D)
5
screw
(BVTP3
(BVTP3
×
10)
6
damper
9
cassette lid assy and
“holder, cassette”
“holder, cassette”
3
two screws
(B2.6
(B2.6
×
5)
1
connector
(CNP301)
(CNP301)
REC SW board
4
motor assy (M301)
5
belt
2
head (HRP301)
– 14 –
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
Mode
Tension Meter
Meter Reading
FWD
CQ-403A
more than 100 g
(more than 3.53 oz)
• Tape Tension Measurement
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head magnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
• Torque Measurement
Mode
Torque Meter
Meter Reading
2.95 – 6.86 mN•m
FWD
CQ-102C
(30 – 70 g•cm)
(0.42 – 0.97 oz•inch)
0.15 – 5.39 mN•m
FWD
CQ-102C
(1.5 – 5.5 g•cm)
Back Tension
(0.021 – 0.076 oz•inch)
more than 5.89 mN•m
FF
CQ-201B
(more than 60 g•cm)
(more than 0.83 oz•inch)
more than 5.89 mN•m
REW
CQ-201B
(more than 60 g•cm)
(more than 0.83 oz•inch)
Tape Speed Adjustment
Setting:
Function: TAPE
Function: TAPE
Procedure:
1. Playback WS-48A (tape center) in the FWD state.
2. Adjust the volume in CAPSTAN/REEL motor (M301) so that
1. Playback WS-48A (tape center) in the FWD state.
2. Adjust the volume in CAPSTAN/REEL motor (M301) so that
the frequency counter reading becomes 3,000 Hz.
Specified Value: 2,985 to 3,015 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
SOUND control : OFF
TAPE DECK SECTION
0 dB=0.775 V
Test tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
Tape Speed Adjustment
Tape speed
Adjustment
Adjustment
CAPSTAN/REEL motor
(M301)
(M301)
– TAPE deck block –
+
–
–
set
Test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
frequency counter
3.2
Ω
POWER board
BH352 pin 1 (TYPE A)
CNP352 pin 1 (TYPE B, C, D)
BH352 pin 1 (TYPE A)
CNP352 pin 1 (TYPE B, C, D)
POWER board
BH352 pin 2 (TYPE A)
CNP352 pin 2 (TYPE B, C, D)
BH352 pin 2 (TYPE A)
CNP352 pin 2 (TYPE B, C, D)
– 15 –
(
): Singapore, Argentine, Australian models
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
530 kHz (531 kHz)
1.0 ± 0.1 V
Confirmation
1,710 kHz
below 5.6 V (below 5.3 V)
(1,611 kHz)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
620 kHz (621 kHz)
CT2
1,400 kHz (1,404 kHz)
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L2
108 MHz
4.0 ± 0.1 V
Confirmation
87.5 MHz
1.7 ± 0.2 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: MAIN board (See page 16)
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function : RADIO
BAND button : AM
Function : RADIO
BAND button : AM
[FM]
Setting:
Function : RADIO
BAND button: FM
Function : RADIO
BAND button: FM
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
pacitors.
• Remove FM antenna in FM adjustment.
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
MAIN board
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
3.2
Ω
POWER board
BH352 pin 1 (TYPE A)
CNP352 pin 1 (TYPE B, C, D)
BH352 pin 1 (TYPE A)
CNP352 pin 1 (TYPE B, C, D)
POWER board
BH352 pin 2 (TYPE A)
CNP352 pin 2 (TYPE B, C, D)
BH352 pin 2 (TYPE A)
CNP352 pin 2 (TYPE B, C, D)
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
3.2
Ω
0.01
µ
F
MAIN board
TP (GND)
TP (GND)
MAIN board
TP (ANT)
TP (ANT)
POWER board
BH352 pin 1 (TYPE A)
CNP352 pin 1 (TYPE B, C, D)
BH352 pin 1 (TYPE A)
CNP352 pin 1 (TYPE B, C, D)
POWER board
BH352 pin 2 (TYPE A)
CNP352 pin 2 (TYPE B, C, D)
BH352 pin 2 (TYPE A)
CNP352 pin 2 (TYPE B, C, D)
– 16 –
Adjustment Location (TYPE A, B, C):
(TYPE D: Almoset same as TYPE A, B, C)
(TYPE D: Almoset same as TYPE A, B, C)
– MAIN BOARD (Conductor Side) –
TP (VT)
TP (GND)
TP (ANT)
– MAIN BOARD (Component Side) –
L2
FM VCO Voltage Adjustment
L4
AM VCO Voltage Adjustment
AM Tracking Adjustment
T1 AM IF Adjustment
FM Tracking Adjustment
L1
CT1
CT1
L3
CT2
CT2
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