– 18 –
set
+
–
test tape
P-4-D400
(400Hz, 0 dB)
level meter
MAIN board
TP (DOLBY-L)/
TP (DOLBY-R)
SECTION 6
ELECTRICAL ADJUSTMENTS
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and 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 (S600) is “A (ON)” position.
2. Turn ON the regulated power supply. (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 (S600) to initially set posi-
tion.
Tape Speed Adjustment
Setting:
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
reading on the speed checker or frequency counter becomes in
specification.
Specification: Constant speed
Adjustment Location: See page 22.
Dolby Level Adjustment
Setting:
[SHIFT]
button
: ON (light up SET UP and
PLAY MODE)
Preset
[4]
(PLAY MODE)
n
[5]
(
n
) buttons
: NR off
SOUND (BAS) button
: Center
SOUND (TRE) button
: Center
SOUND (BAL) button
: Center
SOUND (FAD) button
: Center
SOUND (VOL) button
: Maximum
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV230 (L-CH) and RV240 (R-CH) so that the level
meter reading is –6±0.5 dB (0.37 to 0.41 V).
Adjustment Location: See page 22.
See the adjustment location from on page 22 for the
adjustment.
0 dB=0.775 V
TAPE DECK SECTION
Speed checker
Frequency counter
–1.5 to +2.5%
2,955 to 3,075 Hz
set
+
–
test tape
WS-48A
(3 kHz, 0 dB)
LINE OUT REAR jack (CN780)
10 k
Ω
speed checker
or
frequency counter
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