Sharp RT-203H - Mechanical Adjustment; Adjustment Points Overview; Test Tapes for Measurement

RT-203H(S)
© MECHANICAL ADJUSTMENT
Connect the input/output plug to the receiver, or apply
+12.8V by an external DC power supply.
ITEM ADJUSTMENT REMARKS
POINTS (CHECK)
Driving Tape tention More than 180g
power measuring
cassette
(Play : 35-609-cm)
(Fast-forward :
Tape speed | Test tape Normal speed
Normal speed| Deck 1: VR402
MTT-111 Deck 2: VR404
High speed | High speed
MTT-111 Deck 1: VR401
Deck 2: VR403
Dual-trace
Electronic Oscilloscope
Voltmeter
Playback Mode
Fast-forward 70-110g-cm)
TW-2231
(Rewind
:
ial
aes
@
Pin
Rewind 70-110g-cm) oe
TW-2231
Figure 10—1 AZIMUTH
Sine waveform
attains the maximum.
Test tape Azimuth
MTT-114 adjusting screw
As Smail as Possibte
ie
aa)
Normal speed
2990 + 20 Hz
High speed
5276+ 50 Hz
(
7
* To get the unit in playback mode at high speed, short the collector ; id
and emitter of Q403. 1 it
1 |
t
MAIN
PW.B.
Figure
10—2
AZIMUTH
WAVEFORM
Record /Playback
Head
Normal/High Speed (Record Mode) Frequency Counter
VR401 VR404
OOM)
Ground
VR 402
a403 VR403
Figure 10-3 TAPE SPEED
Figure 10—4 ADJUSTMENT POINTS
TEST TAPES FOR MEASUREMENT
COMPACT CASSETTE TYPE TORQUE METER FOR COMPACT CASSETTE |
T T
FREQUENCY/ MEASUREMENT |
TITLE MODEL LEVEL APPLICATION MODEL RANGE APPLICATION
FLUTTER MTT-111 | 3kHz,--10dB | Tape speed, TW-2111 10 — 100 g-cm Normal : Playback torque
Wow and flutter 1.5 — 10g-cm Normal! : Back-tension
check |
MTT-113 16.3 kH Oue:| Head'est ‘ TW-2121 10 — 100 g-cm Reverse : Playback torque |
. H z,- ead azimut' 7 am - ;
AZIMUTH
—sIMTT-113C|
8kHz,—10dB
|
adjustment
ea
ee
MTT-114 | 10 kHz, -10d8 TW-2231 30 — 200 g-cm Fast-forward, Rewind torque
DISTORTION MTT-118 | 1 kHz, —10dB Distortion check TW-2412 0 — 300g Normal : Driving power
fevel adjustment
DOLBY
LEVEL
|
MTT-150
|
Dolby
B-Type
|
Dolby
NR
B-type
ee
0
S009
Pewee
Dusieg
poner.
+
|
CALIBRATION Tone 200 nwb/m | level adjustment
BLANK MTT-502 - Record frequency
| | check
—10—