CMT-EP707, HCD-EP707 - Sony Audio Service Manual (repair manual). Page 14

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HCD-EP707
14
TUNER  SECTION
0 dB=1 
µ
V
[AM]

Setting:
Function: TUNER
TUNER/BAND switch: AM
[FM]

Setting:
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.
AM RF signal 
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to 
the set.
+
–
level meter
set
32 
Ω
SPEAKER JACK board
SPEAKER terminal (SP801)
FM RF signal
generator
22.5 kHz frequency
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)
MAIN board
TP (GND)
SPEAKER JACK board
SPEAKER terminal (SP801)
digital voltmeter
100 k
Ω
MAIN board
TP (VT)
TP (GND)
SECTION  4
ELECTRICAL  ADJUSTMENTS
Tape Speed Adjustment

Setting:
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-
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)
set
SPEAKER JACK board
SPEAKER terminal (SP801)
–
+
47 k
Ω
CAPSTAN/REEL
motor
Tape Speed
Adjustment

Sample Value of  Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)

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