ADJUSTMENT
<RADIO SECTION>
1. AM IF Adjustment
IFT101 ............................................................... 450kHz
2. AM VT Check
Settings:
• Test point: TP1 (VT)
Method:
Set to AM 530kHz and check the TP1 is
more than 0.9V. Then set to AM 1710kHz
and check the test point is less than 8.5V.
3. AM Tracking Adjustment
L106 .................................................................. 630kHz
VC101 .............................................................. 1440kHz
Adjustment location ................................................ L104
Method:
L102 ................................................................... 59MHz
Settings:
• Test point TP1 (VT)
Adjustment location ................................................ L103
Method:
Set to TV CH1 and adjust L103 so that
the test point becomes 1.0V ± 0.05V. Then
set to TV CH5 and check that the test point
is 8.0V ± 1.0V.
7. TV Tracking Ajustment
L101 ........................................................................ CH1
<TAPE PLAYER SECTION>
8. Tape Speed Adjustment
Settings:
• Test tape :
TTA–100
• Test point :
PHONES (J001)
• Adjustment location : SFR51
• Super Bass:
OFF
• Tape select:
NORM
• Tape/Radio:
Tape
• Volume:
Non-clip (MAX – 10dB
down)
Method:
Play back the test tape and adjust SFR51 for
3000Hz ± 10Hz (FWD) and 3000Hz ±
20Hz (REV). Then confirm WOW is less than
0.50%.
9. GOVERNER Adjustment
Perform the STOP —> PLAY and REVERSE operations
(or PAUSE ON —> OFF) after the motor is replaced.
When the tape starts running smooth, this adjustment
is not necessary. If wow is conspicuous at the beginning
of the tape-run, perform this adjustment following the
procedures below.
1) Solder resistor pattern of the MOTOR AND
GOVERNOR MATCHING ADJ. resistor group.
2) Set the tape speed (using speed adjustment SFR51).
3) Restrict the motor rotation by hand (or turn PAUSE ON).
4) Remove your hand and listen to the beginning of the
tape-run.
5) When the rise of tape running is smooth, no more
adjustment is necessary.
If wow continues for 1 to 2 seconds at the rise time,
change the combined resistance according to procedure
6 and check that the tape starts running smooth.
6) Solder the resistor pattern according to the table below
7) Finally re-check the tape speed.
Caution : Cool the patterns down to normal tempera-
ture after soldering. If the pattern remains
heated, the gorvernor circuit does not
operate normally.
Solder
Open
Open
Solder
Solder
Solder
Pattern
(Procedure
1 above)
Step (1)
Step (2)
Medium
resistance (B)
Low
resistance (A)
High
resistance (C)
Solder
Solder
Solder
11
12
A
MAIN C.B
IFT 101
L 101
L 102
VC 101
TP1(VT)
L 106
2
3
5
7
4
1
8
3
4
6
J001
VR 001
6
PHONES
L 104
SFR 51
J002
L 103
A
B
C
R54
R55
R56
9
(BAR ANTENNA)
* Other side of P.C.B
*
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
