Panasonic RQ-J6 - Electrical Parts Location

RQ-J6 RQ-J6
CAUTION:
Be sure to unplug the headphones while measurements and adjustments.
(Measured values may vary with the headphones plugged in or unplugged.)
Playback gain
Condition:
* Playback mode
Equipment:
* VTVM * Oscilloscope
« Test tape --- QZZCFM
Output level adjustment
1. Test equipment connection is shown In fig. 1.
2. Playback standard recording level portion on test tape (QZZCFM 315Hz, OdB), and using VT VM
measure the output level at LINE OUT.
. Make measurement for both channels.
Standard value: 0.42V+3dB
Tape speed adjustment VR
Adjustment
lf measured value is not standard, adjust VR3 (L-CH), VR4 (R-CH) (shown in electrical parts location).
L-CH/R-CH output balance adjustment
After adjustment (output level adjustment), make sure that difference between the measured values of
bat that | Vi (V) _ Ve (V)
L-CH and R-CH output level is within 1.548 {71 cH outvut level] =[R-CH out put level] 0:79 dB}.
If not, adjust VR3 (L-CH), VR4 (R-CH) so that the difference is minimum (within 1.5 dB).
E4
VR3
VR4
S1
VR5
Bias current adjustment 1. Test equipment connection is shown in
Condition:
fig.
8.
|
«
Record
mode
Z.
Connect
MIC
terminal
1
or
2
each
.
.
terminal
3
(shown
in
fig.
9).
(L-CH)
Equipment:
4
Place
the
unit
into
the
record
mode.
*
VTVM
5. Read voltage on VT VM and calculate
bias current by the following formula:
Value read on VTVM (V)
10 2
Standard value: 0.75+0.1mA
6. |f measured value is not within standard value, make adjustment by
turning VR5.
Bias current (A) =
VTVM Oscilloscope
Fig. 8
MIC. JACK
C1OSIR-CHlS 2193(R-CH)
(L-CH - R-CH)
ELECTRICAL PARTS LOCATION
REPLACEMENT PARTS LIST
Part Name & Description
ELECTRICAL PARTS
QWY4129Y Record/Playback Head
QWY2146 Erase Head
QMA4222 Switch Angle
QJAA0012 Jack Board
QGT1541 Volume Knob (for VR1)
QGT 1542 Volume Knob (for VR2)
ac,
WM034Z
Electret
Condenser
Microphone
|
QBG1679
Microphone
Rubber
QTSA0016
Shield
Plate
QTD1298 Wire Clamper
XQS14C3FN Screw 41.4x3
XQNI6B3FN Screw #1.6X3
XQN17B28FZ Screw 41.7X2.8
XTN2+6 Tapping Screw 2X6
XTN26+6B Tapping Screw $2.6 X6
XWC2B Washer
E2 E1