7
7
D-FJ200/FJ201
Procedure:
1. Connect the oscilloscope to the test point TP601(RF) on the
MAIN board.
2. Set a disc. (YEDS-18)
3. Press the
u
button.
4. Check the oscilloscope waveform is as shown below.
A good eye pattern means that the diamond shape (
◊
) in the cen-
ter of the waveform can be clearly distinguished.
RF Signal reference Waveform (Eye Pattern)
To watch the eye pattern, set the oscilloscope to AC range and
increase the vertical sensitivity of the oscilloscope for easy
watch-ing.
5. Stop revolving of the disc motor by pressing the
x
button.
SECTION 4
ELECTRICAL ADJUSTMENTS
TUNER SECTION
AM section
BAND : AM
FM section
BAND :FM
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency
Reading on digtal
voltmeter
Confirmation
530kHz
<
531kHz
>
Standard value : 0.8–1.8V
Confirmation 1,710kHz <1,602kHz>
Standard value : 8.5–10.0V
<6.9–8.4V>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
620kHz
<
621kHz
>
CT1
1,400kHz
<
1,404kHz
>
TV/WB/FM FREQUENCY COVERAGE ADJUSTMENT
Frequency
Reading on digtal voltmeter
Confirmation
87.5MHz
Standard value : 4.3–5.7V
L2
108MHz
Adjustment value : 9.5V
Standard value : 9.0–10.0V
Confirmation
TV : 2ch
Standard value : 0.1–0.55V
(US model)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
87.5MHz
Confirmation
108MHz
US model
TV/WB TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
197.75MHz [TV : 10ch]
0 dB = 1
µ
V
•
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 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
16
Ω
phones jack (J301)
level meter
ECB
ECB
C16
C8
C33
C22
C17
R13
C10
C23
R1
C5
C44
BP1
TP1(VT)
TP3(FM RF IN)
TP6(TU GND)
C12
Q4
R2
1
D3
CF2
R4
D2
D4
C9
C21
C34
Q8
C27
R16
C43
FL1
1
2
3
FL1
FL2
C37
L4
L3
L2
FJ200:US
FJ200:US
FJ201
FM RF signal
generator
33.75kHz frequency deviation
by 1kHz signal.
Output level :
as low as possible
TP3
(FM RF IN)
0.01
µ
F
[MAIN BOARD]
(Side A)
< > : 9kHz step
Adjustment Location :
Adjustment Location : Main board
Frequency Coverage Adjustment
Setting :
ECB
ECB
C16
C8
C33
C22
C17
R13
C10
C23
R1
C5
C44
BP1
TP1(VT)
TP3(FM RF IN)
TP6(TU GND)
C12
Q4
R2
1
D3
CF2
R4
D2
D4
C9
C21
C34
Q8
C27
R16
C43
FL1
1
2
3
FL1
FL2
C37
L4
L3
L2
FJ200:US
FJ200:US
FJ201
[MAIN BOARD]
(Side A)
TP1 (VT)
TP6 (TU GND)
digital voltmeter
(DC range)
[MAIN BOARD] (SIDE B)
L4 : FM Traking Adjustment
L3 : TV/WB Traking Adjustment
L2 : TV/WB/FM Frequency
Coverage Adjustment
L5 : AM Tracking Adjustment
CT1 : AM Tracking Adjustment
The CD section adjustments are done automatically in this set.
Precautions for Check
1. Perform check in the order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise
indicated.
3. Power supply voltage requirement :DC4.5 V in DC IN jack.
(J401)
VOLUME button : Minimum
HOLD switch : OFF
CD SECTION
RF Level Check
Condition:
• Hold the set in horizontal state.
Connection:
RF level
0.4 to 0.8 Vp-p
VOLT/DIV : 100 mV (With the 10 : 1 probe in use)
TIME/DIV : 500n
s
C
4 C606
C630
5
C613
C612
C615
CL410
(A GND)
TP601(RF)
C309
22
23
12
11
C30
R300
C304
R605
Q601
R608
L601
R614
C310
C312
C321
C308
TP601(RF)
CL410(A GND)
oscilloscope
(AC range)
[MAIN BOARD]
(Side A)
0 dB = 0.765V
