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42
HCD-CP505
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: REC/PB Head
Tape Speed Check
Procedure:
1.
MODE : FWD Playback.
2.
Insert the WS-48B into deck.
3.
Press the
Y
button of deck.
4.
Check the reading of frequency counter becomes 3000
±
90
Hz.
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.35%
(test tape: WS-48B)
Record Level Check
Procedure:
1.
Press FUNCTION button to select ANALOG IN. (This step
is not necessary if the above test mode has already been set.)
2.
Insert a tape into deck, press the
z
REC (TAPE) button, and
then press the
X
(TAPE) button to start recording.
3.
Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase
45
°
90
°
135
°
180
°
good
wrong
GND
R-ch
L
R
SJ301
SPEAKER
Output Terminal
6
Ω
6
Ω
test tape
WS-48B
(3kHz, 0dB)
SJ301
SPEAKER
Output Terminal
frequency
counter
set
6
Ω
Note:
Standard Volume Point is +10 dBs at SPEAKER Output Level (6
Ω
load resistance) during playbacking P-4-L300 Test Tape.
(DSG OFF, TREBLE/BASS CENTER)
Record/Playback Head Azimuth Adjustment
Procedure:
1.
Mode : Playback
Tape
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
Level 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 1 dB of peak.
L-CH
peak
R-CH
peak
screw
position
output
level
within
1 dB
L-CH
peak
R-CH
peak
screw
position
within 1dB
Signal
Used for
DECK SECTION
0 dB=0.775V
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 adjusted.
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
P-4-A100
(10kHz, –10dB)
SJ301
SPEAKER
Output Terminal
level meter
set
+
–
6
Ω
Summary of Contents for HCD-CP505
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