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SECTION 4
QQ
MECHANICAL ADJUSTMENTS
3 7 63 1515 0
1. Clean the following parts with a denatured-alcohol-moistene
swab:
playback head
pinch roller
rubber belt
capstan
idlers
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the power supply
voltage unless otherwise noted.
• Torque Measurement
Mode
Torqu Meter
Forward
CQ-102C
Forward
CQ-102C
Back Tension
Reverse
CQ-102RC
Reverse
CA-102RC
Back Tension
FF, REW
CQ-201B
• Tape Tension Measurement
Mode
Tension Meter
TE
L 13942296513
Forward
CQ-403A
Reverse
CQ-403R
SECTION 5
ELECTRICAL ADJUSTMENTS
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM (MW) Auto Scan/Stop Level adjustments
can be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Set the "power select" switch (S801) is "A" position.
2. Turn ON the regulated power supply. (All LEDs on the set
lights up, and the clock is displayed.)
Note: Press the OFF button, if the clock is not displayed.
3. Push the preset 4 button.
4. Push the preset 5 button.
5. Press the preset 1 button for more than two seconds.
6. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
1. Push the OFF button.
2. Return the "power select" switch (S801) to initially aet posi-
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tion.
.
http://www.xiaoyu163.com
Meter Reading
30 – 65 g•cm
(0.42 – 0.90 oz•inch)
0.5 – 4.5 g•cm
(0.01 – 0.06 oz•inch)
30 – 65 g•cm
(0.42 – 0.90 oz•inch)
0.5 – 4.5 g•cm
(0.01 – 0.06 oz•inch)
60 – 200 g•cm
(0.83 – 2.78 oz•inch)
Meter Reading
more than 90 g
(more than 3.18 oz)
more than 90 g
(more than 3.18 oz)
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2 9
8
See the adjustment location from on page 17 for the
adjustment.
TAPE DECK SECTION
Tape Speed Adjustment
Procedure:
1. Put the set into the FWD PB mode.
test tape
WS-48A
(3 kHz, 0 dB)
set
speaker out terminal
Specification: Constant speed
Speed checker
–1.5 to +2.5%
Adjustment Location: See page 17.
DOLBY Level Adjustment
Setting:
Preset 3 (DOLBY) button : OFF
Q Q
SEL (VOL) button
3
6 7
1 3
1 5
test tape
P-4-D400
(400 Hz, 0 dB)
set
Pocedure:
1. Put the set into the FWD PB mode.
2. Adjust RV401 (L-CH) and RV301 (R-CH) so that level meter
reading is – 6 ± 1 dB (0.35 to 0.43 V).
3. Select the REV play mode, and confirm that level meter read-
ing is within the specification given above.
Adjustment Location: See page 17.
co
.
9 4
2 8
0 dB=0.775 V
speed checker
or
frequency counter
4 Ω
–
+
Frequency counter
2,955 to 3,075 Hz
: Maximum
0 5
8
2 9
9 4
2 8
level meter
+
–
L-CH
MAIN board
TP (DOLBY)
R-CH
m
9 9
9 9
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