Pioneer-FX55ZL-tun-sm电路图 维修手册.pdf
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1、Service cTHanual CIRCUIT DESCRIPTIONS REPAIR ey to set FM mode. Note: Stereo modulation: Main 1 kHz L+R 68.25 Hz dev. Pilot 19 kHz6,75 kHz dev. Step No. FM SG (1kHz 75kHz dev.) F-X552L(BK) (F-X55ZL) tuned frequency display Adjustment Step No. Frequency (MHz) Level (dB) F-X552L(BK) (F-X55ZL) tuned fr
2、equency display Adjustment location Specifications 1 No input signal 87.5 MHz -Check pin 3 (3.4V 1.5V) of tuner assembly. 2 No input signal 108.0 MHz -Check pin (8.7V;!:2;|v) of tuner assembly. 3 98.0 20-30 98.0 MHz T101, T102 Set the output from pin 1 of the tuner assembly to maximum level. (Before
3、 performing the adjustment of Step 3, turn VR401 fully counterclockwise.) 4 98.0 60 No modulation 98.0 MHz L202 Set pin 2 of tuner assembly to 1.4V (0.01V). 5 98.0 80 No modulation 98.0 MHz VR401 Set pin 1 of tuner assembly to 1 .IV (0.01 V). 6 98.0 0 No modulation 98.0 MHz -Check pin 1 of tuner ass
4、embly below 0.8V. 7 98.0 80 98.0 MHz VR301 Adjust the frequency at pin 4 of tuner assembly to 76kHz (150 Hz). 7 No modulation 98.0 MHz VR301 Adjust the frequency at pin 4 of tuner assembly to 76kHz (150 Hz). 8 98.0 60 98.0 MHz T102 Minimize distortion in both left and right channel outputs (adjust T
5、102 to within 90). 8 Stereo modulation (note) 98.0 MHz T102 Minimize distortion in both left and right channel outputs (adjust T102 to within 90). 9 98.0 Variable 98.0 MHz Confirm that the TUNED IND and STEREO IND light up when the level of FM SG is turned to high, and that the TUNED IND and STEREO
6、IND light off when the level of the FM SG is turned to low. 9 Stereo modulation (note) 98.0 MHz Confirm that the TUNED IND and STEREO IND light up when the level of FM SG is turned to high, and that the TUNED IND and STEREO IND light off when the level of the FM SG is turned to low. AM (MW) Tuner Se
7、ction Adjustment Connect up as indicated in Fig. 12-2. Press the AM (MW) key to set AM (MW) mode. Set the AM CHANNEL STEP switch to the 9 kHz position. (F-X55Z(BK)/ZUC, Z model only) Step No. AM SG (400Hz. 3 0 % modulation) F-X55ZL(BK) (F-X55ZL) tuned frequency display Adjustment Step No. Frequency
8、(kHz) Level (dB) F-X55ZL(BK) (F-X55ZL) tuned frequency display Adjustment location Specifications 1 No input signal 531 kHz L401 Set pin 3 of tuner assembly to 1.3V (0.1V). 2 No input signal 1602 kHz TC402 Set pin 3 of tuner assembly to 10.OV (0.3V). 3 Repeat steps 1 and 2 until both specification r
9、atings are satisfied. 4 603 40 603 kHz T401 Set the output from pin 1 of the tuner assembly to maximum level. 5 1395 40 1395 kHz TC401 Set the output from pin 1 of the tuner assembly to maximum level. 6 Repeat steps 4 and 5 until both specification ratings are satisfied. 7 1395 Variable 1395 kHz Che
10、ck that the TUNING indicator comes on when the AM SG level is gradually increased. AM (LW) Tuner Section Adjustment (F-X55ZLBK), F-X55ZL/ZEB model only) Connect up as indicated in Fig. 12-2. Press the AM (LW) key to set AM (LW) mode. Step No. AM SG (400Hz.30% modulation) F-X55ZL(BK) (F-X55ZL) tuned
11、frequency display Adjustment Step No. Frequency (kHz) Level (dB) F-X55ZL(BK) (F-X55ZL) tuned frequency display Adjustment location Specifications 1 No input signal 281 kHz L503 Set pin 3 of tuner assembly to 5.2V (0.1 V). 2 164 40 164 kHz T501 Set the output from pin 1 of the tuner assembly to maxim
12、um level. 3 254 40 254 kHz TC401 Set the output from pin 1 of the tuner assembly to maximum level. 4 Repeat steps 2 and 3 until both specification ratings are satisfied. 1 y F - X 5 5 Z L B K , F - X 5 5 Z L MPX SG FM SG AM SG LW ANT trimmer TC501 CU LW ANT transformer T501 I FM RF transformer Tl 01
13、 T r FM coupling transformer Tl 02 FM DET coil L202 300n dummy Tuner assembly | p. 3 j F-X55ZL (BK) (F-X55ZL) FM 300 ohm antenna terminal / 1 r Oscilloscope AC voltmeter Frequency | counter I Digital voltmeter Distortion meter Fig. 12-1 FM adjustment connection diagram AM antenna terminal lOkn -AAA
14、, , Pin 7 (R ch) Tuner assembly 1 Pm 8 (L ch) F-X55ZL (BK) (F-X55ZL) AM loop antenna AC voltmeter Oscilloscope Fig. 12-2 AM adjustments connection diagram AM ANT trimmer TC401 F AM ANT transformer T401 Connect DC voltmeter Connect AC voltmeter, Oscilloscope and Distortion meter Connect frequency cou
15、nter MPX VCO VR301 R ch AM OSC coil L401 LW OSC coil L503 l 1 AM OSC trimmer TC402 DC12V : AC2.5V TUNE VR401 Connect DC voltmeter Connect DC voltmeter Fig. 12-3 Adjustment positions 1 B F - X 5 5 Z L B K , F - X 5 5 Z L 12. RGLAGE Rglage de la partie syntoniseur MF Faire les raccordements comme indi
16、qu en Fig. 12-1.zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA tro: Principal ikHz L+R 68,25kHz dv. Enfoncer la touche M F pour rgler en mode MF. Pilote l9kHz6,75kHz dv. Etape N FM SG (1kHz 75kHz dv.) Affichage de fr- quence syntonise F-X55ZL(BK) (F-X55ZL) Rglage Etape N Frquence(MHz) Niveau (
17、dB) Affichage de fr- quence syntonise F-X55ZL(BK) (F-X55ZL) Lieu de rglage Caractristiques 1 Pas de signal dentre 87,5 MHz -Vrifier la fiche 3 (3,4V 1,5V| de lensemble syntoniseur. 2 Pas de signal dentre 108,0 MHz - Vrifier la fiche 3 (8,7V*2;oV) de lensemble syntoniseur. 3 98,0 20 a 30 98,0 MHz T l
18、 O l , T102 Rgler la puissance de la fiche 1 de lensemble syntoniseur au niveau maximal. (Avant deffectuer Ie rglage de lEtape 3, tourner VR401 a fond dans Ie sens horaire inverse) 4 98,0 60 Pas de modu- lation 98,0 MHz L202 Rgler la fiche 2 de lensemble syntoniseur a 1,4V(0,01 V). 5 98,0 80 Pas de
19、modu- lation 98,0 MHz VR401 Set pin 1 of tuner assembly to 1,1V (0,01V). 6 98,0 0 Pas de modu- lation 98,0 MHz Vrifier si la fiche 1 de lensemble syntoniseur est endessous de 0,8V. 7 98,0 80 98,0 MHz VR301 Rgler la frquence de la fiche 4 de lensemble syntoniseur a 76 kHz (150 Hz). 7 Pas de modulatio
20、n 98,0 MHz VR301 Rgler la frquence de la fiche 4 de lensemble syntoniseur a 76 kHz (150 Hz). 8 98,0 60 98,0 MHz T l 02 Rduire la distorsion dans les sorties des deux canaux droit et gauche (rgler T l 02 a 90). 8 Modulation stro (Note) 98,0 MHz T l 02 Rduire la distorsion dans les sorties des deux ca
21、naux droit et gauche (rgler T l 02 a 90). 9 98,0 Variable 98,0 MHz Confirmer que Ie TUNED IND et Ie STEREO IND sallument lorsque Ie niveau de FM SG est syntonis trop haut, et que Ie TUNED IND et STEREO IND sont teints lorsque Ie niveau de FM SG est syntonis trop bas. 9 IVIodulation stro(Note) 98,0 M
22、Hz Confirmer que Ie TUNED IND et Ie STEREO IND sallument lorsque Ie niveau de FM SG est syntonis trop haut, et que Ie TUNED IND et STEREO IND sont teints lorsque Ie niveau de FM SG est syntonis trop bas. Rglage de la partie syntoniseur MA (MW) Faire les raccordements comme indiqu en Fig. 12-2. Enfon
23、cer la touche MA (MW) pour rgler en mode MA (MW). Rgler Ie commutateur MA C H A N N E L S T E P en 9me position. (F-X55Z(BK)/ZUC, seulement modle Z) Etape zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA N AM SG (400H2, 30% modulation) Affichage de fr- quence syntonise F-X55ZL(BK) (F-X55ZL) Rgla
24、ge Etape N Frquence (kHz) Niveau (dB) Affichage de fr- quence syntonise F-X55ZL(BK) (F-X55ZL) Lieu de rglage Caractristiques 1 Pas de signal dentre 531 kHz L401 Rgler la fiche 3 de lensemble syntoniseur a 1,3V (0,1V). 2 Pas de signal dentre 1602 kHz TC402 Rgler la fiche 3 de lensemble syntoniseur a
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