Read Sharp XL-UR5H (serv.man2) Service Manual online
XL-UR5H
2 – 3
Electrical Performance
Standard
Adjusting
Values
positions
1 With the recording and playback
mechanism, load the test tapes
TDK-D60
TDK-D60 , and set the mechanism to the
4.5Ӵ
Ӵ A
+/-0.5
ӴA
2 After connecting 100
Ө in series to the
recorder head, measure the bias current
with a valve voltmeter at both of the
with a valve voltmeter at both of the
terminals
Adjustment of
recording and
playback
frequency
characteristics
recording and
playback
frequency
characteristics
1 with the recording and playback
Output
mechanism, load the test tapes (TDK-D60)
deviation
and set the mechanism to the
between
recording and pausing condition in
1KHz and
advance
8KHz
2 While repetitively inputting the reference
:-1dB +/-2dB
frequency signal of 1KHz and 8KHz from
OSC IN, record and playback the tape.
3 While receding and playback the test tape
Lch and Rch so that the output
deviation between 1KHz and 8KHz
becomes -1dB +/-2dB
becomes -1dB +/-2dB
Reference Values for Electrical Function Confirmation Items
Measurement method
Standard
Adjusting
Values
positions
1 While changing over to and form BIAS 1
and 2, confirm that the frequency is
changed
and 2, confirm that the frequency is
changed
62KHz
T201
+/-6KHz
2 With the recording and playback
mechanism, load the test tape.
(TDK-D60 ) , and set themechanism to the
recording and pausingcondition in advance.
(TDK-D60 ) , and set themechanism to the
recording and pausingcondition in advance.
3 Confirm that the BIAS TP frequency on the
P.C. board is 62KHz +/-6KHz
P.C. board is 62KHz +/-6KHz
P.C. board
Items
Items
Measurement
conditions
Playback
:Test tape
Measurement
terminal
terminal
Recording
bias
frequency
bias
frequency
TDK-D60
:OSC IN
(REF.:- 10dB)
:Reference frequency
1KHz and 8KHz
:Test tape
Adjustment of
recording bias
current
(Reference
Value)
recording bias
current
(Reference
Value)
:Both recording and
headphone terminals
Measurement
output terminal
output terminal
Recording mode
Measurement
conditions
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:Mode
Playback mode
TDK-D60
Measurement
output terminal
output terminal
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TDK-D60
:Test tape
: BIAS TP on
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