Panasonic RN-105D - Reassembly Procedures; Measurement and Adjustment Methods; Head Azimuth Adjustment; Tape Speed Adjustment

RN-105D
Mi REASSEMBLY PROCEDURES
¢ How to install the Main
P.C.B.
Install the main P.C.B.
in the mechanism unit
so that positions @,
and © match with
positions @), 6) and ©
respectively as shown
in Fig. 2.
e How to install the
speaker.
Install the speaker in
the speaker box as
shown in Fig. 1.
Mechanism Unit
Fig. 2
¢ How to install the cassette lid.
1. First insert lid hinge ® and then hinge © in the front cabinet as shown in Fig. 3.
2. With the lid open, insert spring end @ in hole &) in the front cabinet as shown in
Fig. 4.
3. Close the cassette lid and then insert spring end © in hole ©&) in the cassette lid
as shown in Fig. 5.
Cassette lid
Mi MEASUREMENT AND ADJUSTMENT METHODES
NOTES: Make sure the unit is in good working order before attempting measurements and adjustments.
Set the switches and controls to the positions as specified for this procedure.
Make sure heads are clean.
eMake sure capstan and pinch roller are clean.
eSuggested room temperature for this procedure.
(A) Head Azimuth
. Assemble the mechanism and cabinet parts completely.
@Volume control: Maximum
e Tape speed selector switch: 2.4cm/s
eFF/REW switch: OFF
Adjustment . Play back the head azimuth adjusting tape (2.4cm/s, 3kHz...QZZMWA.)
Condition: . Adjust the azimuth adjusting screw (Refer to Fig. 1) of Record/Playback head to
Playback mode obtain the maximum monitor output.
Equipment: . After adjusting, repeat PLAY and STOP some times and confirm that the output
eTest tape variation is less than the specified level (within 3 dB).
... QZZMWA R/P Head
Tape speed . Test equipment connection is shown in Fig. 2. Monitor jack Fig. 1
adjustment
Condition:
Playback mode
Equipment:
@DC power supply
@ Digital electronic
counter
eTest tape
...QZZMWA for
. Apply 3 V to DC IN.
. Connect the monitor output (8Q) to the counter.
. Playback the tape speed adjusting tape (for oc power supply Playback mode
. Measure this frequency. Fig. 2
DC IN jack
Digital electronic
2.4 cm/s 3 kHz. QZZMWA). counter
Standard value: 2970 + 20 Hz (2.4cm/s)
(ambient temperature: 10° C~30° C)
2.4 cm/s 6. If measured value is not within standard, adjust as follows.
e2.4cm/s adjustment
1. Set the tape speed selector switch to 2.4cm/s.
2. Adjust tape speed adjustment VR2 (Refer to Fig. 3) so that frequency is
2970+ 20Hz.