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RQ-P303
MEASUREMENT AND ADJUSTMENTS
Mi ADJUSTMENT INSTRUCTION
READ CAREFULLY BEFORE ATTEMPTING ADJUSTMENT
1. Set volume control to maximum.
5. Set tape selector switch to normal.
2. Set Dolby NR switch to OFF.
6. Set power source voltage to 1.5V DC.
3. Set hold switch to OFF.
PROCEDURE
4. Set XBS selector switch to OFF.
Playback the central part of the tape and adjust
MEASUREMENT | ADJUSTMENT
ITEM
TEST TAPE
POINT
POINT
VR1 and VR2 so that the tape speed is as follows.
Headphones
jack| VR1...Forward
Forward: 3,000*3Hz
(16Q)
VR2...Reverse
(Refer to Fig. 1) | (Refer to Fig. 2)
Reverse: 3,000:2Hz
QZZCWAT
(3kHz, —10dB)
Tape speed
Mi ADJUSTMENT POINT
* Please refer to the Circuit Boards and Wiring Connection Diagram for test point locations
TAPE
SPEED
TAPE
SPEED
(REV}
(FWD)
3000*29H2 30007882
—e
for
Headphones Jack
~« For Measuring
—e Instrument
R=16Q
* Tape Pass Control
Fig. 2
This unit uses the TPC system making the head azimuth adjustment unnecessary.
eTPC System Outline
The TPC guides on both sides of the head and on one side of the pinch rollers are
installed in such a way (see Fig. 3) that the tape will run evenly and along the headgap
at the right angle. The head azimuth adjustment is therefore unnecessary; there are
no head azimuth adjustment screws.
The TPC guides on one side of the pinch rollers also control the disturbance caused
TPC System
ee
<i
DA
u
by the tape width and speed in the forward and reverse mode.
=
&
«ime
;
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TPC Guide
TPC Guide
TPC Head
Fig. 3
Mi How to check the operation of the Mechanism
1. Remove the P.C.B. as shown in "'How to remove the Main P.C.B."' and then remove the Mechanism Assembly.
Fig. 4
PLAY button
Fig. 5
pray button
2. In the stop mode, connect the motor lead with the
3. Inthe stop mode, connect the motor lead with the
red covering to the plus
(+) voltage and the motor
red covering to the minus (—) voltage and the
lead with the black covering to the minus (—)
motor lead with the black covering to the plus (+)
voltage of the 1.2V power supply.
voltage of the 1.2V power supply.
The "rewind"? mode will be set on the unit.
In
The fast forward mode will be set on the unit.
In
this mode, press the PLAY button to check if the
this mode, press the PLAY button to check if the
mode is changed to reverse playback.
mode is changed to forward playback.
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