Sharp WQ-T281Z - Page 6

WQ-T2812
CIRCUIT ADJUSTMENT (AUDIO SECTION)
SETTING @ Tape selector switch: Normal E.V: ELECTRONIC VOLTMETER
POSITION e Volume control: Maximum
OF SWITCH | e Graphic equalizer controls: Center pia Record/Playback
AND
KNOB
|
e
Function
selector
switch:
Tape
Oscilloscope
Head
@ Beat cancel switch: A eo
E.V.
Frequency
Counter
REMARKS (CHECK)
BIAS OSCI- (A= 98+ 4kHz) :
LLATION (B = 104 + 1.5 kHz) Figure 8—1 BIAS OSCILLATION FREQUENCY
FREQUENCY (C = 108 + 2 kHz)
Record
(Normal: 60 + 10 mV) Mode wae Oscilloscope
PLAYBACK Test tape (2.0 V + 3 dB)
AMPLIFIER
SENSITIVITY
Figure 8-2 ERASE CURRENT
Oscilloscope
Playback
CNP103
Test Tape
MTT-118
Record/Playback
Head
Figure 8—3 PLAYBACK AMPLIFIER SENSITIVITY
TEST TAPES FOR MEASUREMENT
COMPACT CASSETTE TYPE TORQUE METER FOR COMPACT CASSETTE
TITLE FREQUENCY/ APPLICATION MODEL | MEASUREMENT APPLICATION
LEVEL RANGE
curren | wrtait | 3enz,—1088 | Tepespma, | | twaitr | 10~T009en
Wow and flutter
/15-10gem Normal : Back-tension
AZIMUTH MTT-113 6.3 kHz, —10 dB
MTT-113C | 8kHz, —10 dB
MTT-114 | 10 kHz, —10 dB
check
TW-2121 10 — 100 g-cm Reverse : Playback torque
DISTORTION MTT-118 1 kHz, —10 dB Distortion check
level adjustment
[is= oven | Rowe beckwmion
DOLBY LEVEL| MTT-150 Dolby B-Type Dolby NR
CALIBRATION Tone 200 nwb/m | B-type level
adjustment
TW-2231 30 — 200 g-cm Fast-forward, Rewind torque
BLANK MTT-502 Record fre-
quency check
Head azimuth
adjustment
TW-2412 0 -— 300g Normal : Driving power
TW-2422 Reverse : Driving power