Teac R-919X Service Manual

V-970X/R-919X |
10
4-4 REEL TORQUE CHECKS AND ADJUSTMENTS
1. Using a cassette torque meter, check that reel torque at each
tape transport operation is within the following specified range.
fe ee 2 V-970X R-919X
25 ~ 60 g-cm 25 ~ 60g-cm
(0.34 ~ 0.83 oz-inch) | (0.34 ~ 0.83 oz-inch)
Take-up
(FWD/REV)
0.40 ~ 0.52
* . pee
Fast Forward/ 90 ~ 160 g-cm
Rewind (1.25 ~ 2.22 oz-inch)
*Back Tension
1. Connect a DC voltmeter between TP.4 and TP.GND on the
main PC board.
2. Play the middle part of test tape MTT-5511 and adjust the
follawing so that the voltmeter shows the values in the above
table.
V-970X: R42
R-919X: R42 (FWD), R74 (REV)
(Since R42 and R74 are interlocked, after adjusting one, check
the other.)
4-5 TAPE SPEED ADJUSTMENT
1. Connect a frequency counter to the deck as shown in Fig. 4-10.
2. Playing the mid portion of an MTT-111 test tape in FWD and
REV directions, adjust the semi-fixed resistor on capstan
motor so that tape speed becomes 3,000 Hz +5 Hz. An insu-
lated and non-metallic flat-head screwdriver should be used for
this adjustment,
3. In both FWD and REV play modes, check that the following
values are obtained at the beginning and at the end of the tape.
Deviation: 3,000 Hz +45 Hz
Width of deviation: Within 30 Hz
4-6 WOW AND FLUTTER CHECKS
Note: tn both FWD and REV play modes, these measurements
should be made at the beginning, middie and the end of the
tape.
4-6-1 PLAYBACK METHOD
1. Connect a wow and flutter meter to the deck as shown in
Fig. 411.
2. Loada TEAC MTT-111 test tape or equivalent and, in FWD and
REV directions, play it to measure the wow and flutter value.
3. Specifications are shown below.
0.05% WRMS (V-970X)
0.055% WRMS (R-919X)
4-4 YW hb ORRRORE
lL ARy hE RIL - A-—FICKSMEMAT HO MAINT
HDOELLCSHERSS.
25~60 g > cm
FAGLEF
eRe
(FHD/REV)
25~60 g + cm
0.40~0. 52V
(FHD/REV)
90~1609 - cm | 90~~160g - cm
enKy DeFvYary
1. DC @BGERt4% HAIN PCB ® TP.4 & TP.GND KCeMRTS.
2. FAb+F—T HIT-5511 OPRAAEBEL, BHO
0. 40~0. 56V
FRO (F.F.,REWSE )
DEROECSOLA RBIS.
V-970X R42
V-919X R42 (FWD), R74 (REV)
( R42 & R74 SMBHLTTWSOCHASMBLERAI
HHFTOHBITSce. )
4-5 F-TPREWE
1. Fig. 4-l0OD KK DITIMKRADUY SET y FICS B.
20 MTT-S Ab F—IO WE MEFWD.REVENENT
FEEL, KE D3, 000Hz PSHzIC OK DIC Fp
DAPY > EC-IO FEM IETS S. TAMIA HARK
SNEFTEGBR VY IFA KBSCNEWHNTSCK,
3. FWD,REVENENICRT, F-ID BME SRUICT
POH DEESNS CEMA S,
fi: = 3,000Hz * 45Hz
ZH. 30H2 LWA
4-6 D9 -7>v7T7RER
its FWD,REV#H, FTO BH, 4A, BRU CEA
ENMET SB.
4-6-1 BAK
1 Fig4-lIDkDICDD-DIOyvI + A-—- Fay FICHE
B.
2. TEAC MTT-HIF Ah» F~ TRIGA MER TAR,
FWDAUREVO ii i CHELID - D Oy BG WE
tS.
3. BUS 0.05% WRMS (Re HUE) V-970X
0.055% WRMS (HBRe HIE) creo R-919X

Teac R-919X Specifications

General

Brand	Teac
Model	R-919X
Category	Cassette Player
Language	English