Sharp WOQ-272H(R) - Electrical Adjustments; Dial Cord Stringing Procedure; Audio Section Circuit Adjustment

WOQ-272H(R)
©
485 *O mm
STRINGING OF DIAL CORD
1. Turn the drum fully in the direction @) shown in Fig. 10—2
and stretch its cord over the parts in the numerical order.
2. Then turn the tuning control shaft fully in the direction (B)
shown in Fig. 10—2 and fix its pointer as shown in Fig. 10—1.
Dial Cord Assembly (203)
SETTING
POSITION
OF SWITCH
AND KNOB
BIAS OSCI-
LLATION
FREQUENCY
PLAYBACK
AMPLIFIER
SENSITIVITY
Figure 10—1
Dial Pinter
(214)
5 Turns
Tuning
Control
Figure 10—2
CIRCUIT
ADJUSTMENT
(AUDIO
SECTION)
@ Volume control: Maximum
@ Tone control: Maximum
© Function selector switch: Tape
© Beat cancel switch: A
Test tape
MTT-118
REMARKS (CHECK)
(A = 100 + 3 kHz)
(B = 103 + 3 kHz)
(C = 94+ 3 kHz)
(Normal: 45 + 5 mV)
(1.3 V +3 dB)
E.V: ELECTRONIC VOLTMETER
Record
Mode
Record/Playback
—cijloscope
Head
oa
Vv.
Frequency
Counter
Figure 10-3 BIAS OSCILLATION FREQUENCY
Record
Mode
Erase Oscilloscope
Figure 10—4 ERASE CURRENT
Oscilloscope
Test Tape &
MTT-118 77
Record/Playback
Head
Figure 10—5 PLAYBACK AMPLIFIER SENSITIVITY
—~10—