Alpine TDA7556R Service Manual page 67

(1) After removing the pinch roller spring, remove two screws @ as shown in Figure 15.
(2) Remove solder 23 and remove the head from the head P.C.Board as shown in Figure 16.
(3) After replacement, mount the new head following the removal steps in the reverse order.
NOTE : ( When using the soidering iron, set the temperature of the soldering iron to270° +20°C and the soldering
time to less than 1 second.
@ Take care that the solder is not loose, that there is no shortcircuit and that the coating is not damage.
@ Do not bring the soldering iron near the head P.C.Board. Make sure that the head P.C.Board is not lifted.
@ Fasten the two screws with a fastening torque 1kg.cm. Note that the tension of the head spring can be
descreased if the screws are fastened too strongly.
(4) Adjust the height of the head as shown in Figure 17, 18 and 19.
(4) -1 Place the height adjustment gauge(Al-500) on the head base, and adjust the height so that the check bar
fits in the tape head guide smoothly.
(4) -2 When the check bar touches the top (or bottom) of the tape guide, insert a spacer (t0.1mm or polystider
washer t0.13mm). If necessary, remove the spacer.
NOTE : @ If you do not have a height gauge like described in (4)-1, run the tape at normal speed and adjust the
height of the head and the tape head guide so that the tape does not curl.
(5) After having assembled the complete mechanism, adjust the angle of the head with test tape MTT-114NB.
(Refer to chapter "Adjustment of the head angle".) After the adjustment, apply the screw lock and fix the screws.
f. Nv FORMA
(1) EX FO-F-ATFUYLFERLER, 2ADAVORALET. (M15Sh)
(2) #2384, Avy FRR SAY FERUALET., (M168)
(3) READANy FERRER. RUOALADPOFIBCRU HUET.
(EM) © BAF tA t oR. HAF AME270 +20C,. KRAVEMIMLF ETS.
@M-K¥#B. Ya-hEORuUCIE,
@ry KRRMIClt, TFHESTEVTIE, RW Ay FRRMICBPEPCOREBRTSICL,
@ 2ADNRV iS kgomOD hILT CHOMUSCLE, BL. RVEMORLSENY ENRAPARW. INR
MOE ZENCEBTS IL,
(4) \y FBSMBtGuoet. (B17, 18, 1988)
(4) -1B5e7-Y (Al-500) EXKy KEN-AZICOH. Fryv7-N-PF-—TPry FHT FIEAZA-Aeo
ASBSKCSHCET,
(4) -2F7-TPHT KOE (RUF) CF ry 7+ N-PY4KSMIE. AZAN-Y-— (tO1mMUEKY ASL F-—
Dyv+7—t0.138mm) E-MANET, Rie, AN-—G-ERATFTITEMEDOCMHV ESS TRICULET.
GERIO (4) 10S
F-VOCUBS. F-FeMBER SY. F-TSA-VLIPECE<S
BSRIC
BAe (Ay KFRUF-TFrAy KAT EF) CMBLET.
(5) MEMTIGDAHEBARMICMALWVGKR, FAKF—T (MTT-114NB) CrAv FOREtCMBUVET.
(Ny FERRMBAKOMBCSRULTK AU.) ABR. AVOYVIEBAL, AVYERELET.
Playback head
Games) ge Spacer
fi
LOTT
(assdits ZILLA —— a
Al-S00gauge Tapehead = Figure 1
aug guide igure 18
Adjustment screw
F ixing screw
S
Head P.C.Board Figure 16
Tilting
Angle
90°+30°
1 Head
(NG) (NG) Maximum _ Al-500gauge
'i (The gauge must be
Al-500gauge The nosepiece of the gauge inserted smoothly)
; must be between the minimum Fi 19
Figure 17 and maximum positions. igure
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