Aiwa CX-JT8 Service Manual
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Aiwa CX-JT8 Service Manual

Aiwa CX-JT8 Service Manual

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  • Page 1 http://servis-manual.com/...
  • Page 2 CX-JT8 SECTION 4 TEST MODE [COLD RESET] [CD TRAY LOCK MODE] • The cold reset clears all data including preset data stored in the • This mode is used to unable to take sample disc out of tray in RAM to initial conditions. Execute this mode when returning the shop.
  • Page 3 CX-JT8 [AGING MODE] 3. Tape Deck Section The sequence during the aging mode is following as below. • This mode can be used for operation check of CD section and If an error occurred, stop display that step. tape deck section.
  • Page 4 CX-JT8 [GC TEST MODE] [MODEL, DESTINATION AND VERSION DISPLAY] • This mode is used to check the fluorescent indicator tube, LED • This mode is used to check the model, destination and software and key. version. Procedure: Procedure: [POWER] 1. Press the key to turn the power ON.

  • Page 5: Electrical Adjustments

    CX-JT8 SECTION 5 ELECTRICAL ADJUSTMENTS Note: Clear RF signal waveform means that the shape “ ◊ ” can be clearly CD SECTION distinguished at the center of the waveform. Note: RF signal waveform 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.
  • Page 6 CX-JT8 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – CD Section – RF AMP, FOCUS/TRACKING ERROR AMP, DIGITAL SIGNAL PROCESSOR, DIGIRAL SERVO PROCESSOR, • R-ch is omitted due to same as L-ch. DIGITAL FILTER, D/A CONVERTER • SIGNAL PATH IC721 : CD PLAY...
  • Page 7 CX-JT8 6-2. BLOCK DIAGRAM – TUNER/TAPE/PANEL Section – DECK A/B SELECT SWITCH, REC/PB EQ AMP IC201 (SUFFIX-11) IC201 (SUFFIX-13) AIN (L) L-CH TAI (L) MUTE EQOUT (L) PB-OUT (L) TAPE-L, REC-L BIN (L) TAPE-L (Page 24) (PB) (DECK-A) R-CH R-CH...
  • Page 8 CX-JT8 6-3. BLOCK DIAGRAM – AMP/POWER SUPPLY Section – (Except AEP, UK, CIS) MIC LEVEL MIC, SA (Page 23) Q401 J401 VR401 D401 MIC MIXING D402 SWITCHING MIC AMP MIC AMP OUTPUT LEVEL IC401 (1/2) IC401 (2/2) FAN MOTOR M731...
  • Page 9 CX-JT8 6-6. SCHEMATIC DIAGRAM – BD Board – • See page 52 for IC Block Diagrams. • See page 52 for Waveforms. R732 IC803 MM1571J R731 2.2k R721 R722 C753 R834 R707 C709 C746 C742 C708 R729 C744 C754 6.3V...
  • Page 10 CX-JT8 6-8. SCHEMATIC DIAGRAM – CHANGER Section – • See page 52 for IC Block Diagrams. LOADING MOTOR DRIVE IC701 BA6956AN R702 R701 CN721 CN704 LM-2 LM-2 D701 M751 C751 LM-1 LM-1 MTZJ-T-77 0.01 (LOADING) 5.1A S711 DISC TRAY ADDRESS DETECT...
  • Page 11 CX-JT8 6-9. SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-11) – • See page 52 for IC Block Diagram. (1/4) CN101 VM+9V D102 10EDB40-TB3 TUNER UNIT (COAXIAL) SUPPLIED WITH TUNED TUNED ANTENNA C101 C310 THE ASSEMBLED C103 100 16V BLOCK LOOP...
  • Page 12 CX-JT8 6-10. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-11) – • • See page 52 for IC Block Diagram. See page 52 for Waveforms. C268 (2/4) R268 R266 R220 4.7k 4.7k C248 R286 R216 R272 C260 C272 (PB) 4.7k 0.47...
  • Page 13 CX-JT8 6-11. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-11) – • See page 52 for IC Block Diagram. (Page 30) (3/4) R375 4.7k R339 R331 3.3k R340 5.6k R478 2.2k R403 C316 C330 C340 Q315 R347 R338 Q316 2SK2158 CN306 4.7k...
  • Page 14 CX-JT8 6-12. SCHEMATIC DIAGRAM – MAIN Board (4/4) (Suffix-11) – (Page 30) (Page 31) (4/4) C363 MIC10V R309 R313 100k CN304 FIL2 FIL1 D-GND -VFL -VFL EVER+10V EVER 10V BUFFER MIC+10V IC304 MIC 10V NJM4565M 4V(SW) BU1924 CLK C364 R432...
  • Page 15 CX-JT8 6-15. SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-13) – • See page 52 for IC Block Diagram. (1/4) ∗ CN101 CN101 (AEP,UK) ∗ (EXCEPT AEP,UK) VM+9V D102 10EDB40-TB3 TUNED TUNED C101 C310 C103 100 16V TUNER UNIT (COAXIAL) SUPPLIED WITH...
  • Page 16 CX-JT8 6-16. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-13) – • See page 52 for IC Block Diagram. • See page 52 for Waveforms. C268 (2/4) R268 R266 R220 4.7k 4.7k C248 R286 R216 R272 C260 C272 (PB) 4.7k 0.47...
  • Page 17 CX-JT8 6-17. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-13) – • See page 52 for IC Block Diagram. (Page 36) (3/4) R375 ∗ R339 R331 ∗ ∗ R340 R403 ∗ R331 ∗ R340 ∗ R375 (E,E51,SP,AUS) 1.5k (AEP,UK,CIS) R478 2.2k 5.6k...
  • Page 18 CX-JT8 6-18. SCHEMATIC DIAGRAM – MAIN Board (4/4) (Suffix-13) – (Page 36) (Page 37) (4/4) C363 MIC10V R309 R313 100k C437 220p CN304 (AEP,UK) FIL2 FIL1 D-GND -VFL -VFL EVER+10V EVER 10V BUFFER MIC+10V IC304 MIC 10V NJM4565M 4V(SW) RCLK...
  • Page 19 CX-JT8 6-21. SCHEMATIC DIAGRAM – POWER Board (1/2) – (1/2) (SUFFIX-11) CN501 L-OUT SP-GND R-OUT SURR LINK/MATRIX UNREG VM RYB+ (Page 32) RELAY B+ IN-L A-GND IN-R PW-GND VM(AC) (Page 38) VM(AC) O-POWER (SUFFIX-13) HOLD 0.22 4.7k 6.8k 1SS355TE-17 2.2k...
  • Page 20 CX-JT8 6-22. SCHEMATIC DIAGRAM – POWER Board (2/2) – (2/2) D503 MC2838 R539 R529 4.7k R541 2.2k R537 D501 R521 MC2836 ∗ C517,518 R543 2.2k 1.8k D510 R559 0.22 50V (AEP,UK,CIS) MC2836 3.9k 0.47 50V (E,E51,SP,AUS) Q501 C511 Q507 2SD2562...
  • Page 21 CX-JT8 6-24. SCHEMATIC DIAGRAM – CD BUTTON/HEADPHONE/MICROPHONE Boards – (E,E51,SP,AUS) (SUFFIX-11) CN402 CN105 C301 C302 J401 1000p 1000p J221 MIC IN L-OUT PHONES HP-GND (Page 32) MIC OUT R-OUT HP CTL (Page 47) HP CTL (Page 38) (SUFFIX-13) DISC DIRECT PLAY...
  • Page 22 CX-JT8 6-20. SCHEMATIC DIAGRAM – PANEL Board – • • See page 52 for IC Block Diagram. See page 52 for Waveforms. FL901 FLUORESCENT INDICATOR TUBE JR901 R613 R614 R615 R616 R617 R618 R619 R620 2.2k 2.2k 2.2k 2.2k 2.2k 2.2k...
  • Page 23 CX-JT8 6-29. SCHEMATIC DIAGRAM – TRANSFORMER BOARD – (AEP, UK, CIS, E51 models) (EXCEPT E51) PT901 ∗ NOT REPLACEABLE: MAIN POWER TRANSFORMER BUILT IN TRANSFORMER (E51) F902 T2.5AL 250V PT901 MAIN POWER TRANSFORMER (E51) CN902 F905 S901 T8AL (EXCEPT E51)
  • Page 24 CX-JT8 6-30. SCHEMATIC DIAGRAM – TRANSFORMER BOARD – (E, SP, AUS models) ∗ NOT REPLACEABLE: BUILT IN TRANSFORMER PT901 F902 MAIN POWER TRANSFORMER T2.5AL 250V F905 T8AL 250V JW918 (E,SP) (AUS) JW905 JW913 S901 CN902 VH(AC) VOLTAGE VL(AC) 220-240V JW906...
  • Page 25 CX-JT8 • Waveforms • IC Block Diagrams – MAIN Board – – PANEL Board – – BD Board – – BD Board – IC721 LC78646E-E 1 IC721 4 (RF) (CD Play Mode) qa Q223 (Base) (REC Mode) wa IC901 qs (XT1)
  • Page 26 CX-JT8 7-8. CD MECHANISM DECK SECTION-1 (CDM74F-K6BD71A) M741 CD mechanism deck section -2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark -243-815-01 TABLE (LOADING) 1-687-134-11 MOTOR (TB) BOARD 4-243-816-01 TRAY 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING 4-218-253-21 SCREW (M2.6), +BTTP...
  • Page 27 CX-JT8 7-9. CD MECHANISM DECK SECTION-2 (CDM74F-K6BD71A) S711 M751 CD mechanism deck section -3 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING 3-016-533-11 WASHER (FR), STOPPER 4-244-034-01 BELT (LOADING) 4-244-108-01 GEAR, SWING...
  • Page 28 CX-JT8 7-10. CD MECHANISM DECK SECTION-3 (CDM74F-K6BD71A) BU-K6BD71A Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-4955-707-1 PULLEY (A5) ASSY, CHUCKING 4-227-549-11 INSULATOR 1-471-035-11 MAGNET ASSY 4-227-045-31 SPRING (INSULATOR), COIL 4-231-151-01 STOPPER (BU) 4-231-189-01 PULLEY (B), CHUCKING 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING...
  • Page 29 CX-JT8 7-11. BASE UNIT SECTION (BU-K6BD71A) M702 M701 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No.

  • Page 30: Electrical Parts List

    CX-JT8 SECTION 8 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 31 CX-JT8 CD BUTTON Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark FB806 1-550-907-21 FERRITE R805 1-216-809-11 METAL CHIP 1/10W FB807 1-550-907-21 FERRITE R806 1-216-809-11 METAL CHIP 1/10W R807 1-216-809-11 METAL CHIP 1/10W FB808 1-550-907-21 FERRITE R817 1-216-827-11 METAL CHIP 3.3K...
  • Page 32 CX-JT8 DRIVER HEADPHONE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-687-135-11 DRIVER BOARD A-4734-192-A MAIN BOARD, COMPLETE (AEP, UK) A-4734-455-A MAIN BOARD, COMPLETE (E51) ************* A-4734-803-A MAIN BOARD, COMPLETE (CIS) < CAPACITOR > A-4734-957-A MAIN BOARD, COMPLETE (E, SP, AUS)
  • Page 33 CX-JT8 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C314 1-107-714-11 ELECT 10uF C386 1-126-947-11 ELECT 47uF C390 1-162-953-11 CERAMIC CHIP 100PF C315 1-126-963-11 ELECT 4.7uF C391 1-162-953-11 CERAMIC CHIP 100PF C316 1-126-963-11 ELECT 4.7uF...
  • Page 34 CX-JT8 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark CN306 1-778-982-21 CONNECTOR, BOARD TO BOARD 13P JR302 1-216-864-11 SHORT CHIP 0 (SUFFIX-11) CN307 1-778-982-21 CONNECTOR, BOARD TO BOARD 13P JR303 1-216-864-11 SHORT CHIP CN310 1-564-707-11 PIN, CONNECTOR (SMALL TYPE) 5P...
  • Page 35 CX-JT8 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R315 1-216-833-11 METAL CHIP 1/10W Q330 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R316 1-216-833-11 METAL CHIP 1/10W Q331 6-550-289-01 TRANSISTOR 2SA1235F Q372 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R317 1-216-825-11 METAL CHIP 2.2K...
  • Page 36 CX-JT8 MAIN MICROPHONE MOTOR (LD) MOTOR (TB) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R375 1-216-829-11 METAL CHIP 4.7K 1/10W R432 1-216-809-11 METAL CHIP 1/10W (E, E51, SP, AUS) 0 R433 1-215-891-11 METAL OXIDE 0 R434...
  • Page 37 CX-JT8 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4734-174-A PANEL BOARD, COMPLETE (AEP, UK) C504 1-126-964-11 ELECT 10uF A-4734-290-A PANEL BOARD, COMPLETE (E51) C505 1-126-916-11 ELECT 1000uF 6.3V A-4734-798-A PANEL BOARD, COMPLETE (CIS) C506 1-164-156-11 CERAMIC CHIP 0.1uF...
  • Page 38 CX-JT8 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D502 8-719-991-33 DIODE 1SS133T-77 JR401 1-216-864-11 SHORT CHIP D503 8-719-991-33 DIODE 1SS133T-77 D504 8-719-991-33 DIODE 1SS133T-77 JR403 1-216-296-11 SHORT CHIP 0 (E, E51, SP, AUS) D505...
  • Page 39 CX-JT8 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R104 1-216-821-11 METAL CHIP 1/10W R247 1-249-429-11 CARBON 1/4W R105 1-249-417-11 CARBON 1/4W R248 1-249-433-11 CARBON 1/4W R106 1-249-417-11 CARBON 1/4W R249 1-249-433-11 CARBON 1/4W R107...
  • Page 40 CX-JT8 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R414 1-216-797-11 METAL CHIP 1/10W (E, E51, SP, AUS) R808 1-216-797-11 METAL CHIP 1/10W R415 1-247-807-31 CARBON 1/4W R809 1-249-429-11 CARBON 1/4W (E, E51, SP, AUS)
  • Page 41 CX-JT8 PANEL POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R949 1-216-845-11 METAL CHIP 100K 1/10W S801 1-786-396-11 SW, RTRY EC12E24604-30MM (VOLUME) R950 1-249-441-11 CARBON 100K 1/4W S802 1-786-396-11 SW, RTRY EC12E24604-30MM (BASS) R951 1-249-441-11 CARBON...
  • Page 42 CX-JT8 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 6-500-334-01 DIODE MC2836 C507 1-100-152-11 CERAMIC CHIP 100PF 100V 6-500-335-01 DIODE MC2838 C508 1-100-152-11 CERAMIC CHIP 100PF 100V C509 1-164-733-11 CERAMIC CHIP 820PF 8-719-988-61 DIODE 1SS355TE-17...
  • Page 43 CX-JT8 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > 1-216-842-11 METAL CHIP 1/10W 1-216-842-11 METAL CHIP 1/10W 6-550-289-01 TRANSISTOR 2SA1235F 8-729-120-28 TRANSISTOR 2SC1623-L5L6 1-216-821-11 METAL CHIP 1/10W 8-729-120-28 TRANSISTOR 2SC1623-L5L6 1-216-821-11 METAL CHIP...
  • Page 44 CX-JT8 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-835-11 METAL CHIP 1/10W R512 1-216-821-11 METAL CHIP 1/10W 1-216-833-11 METAL CHIP 1/10W R513 1-218-867-11 METAL CHIP 6.8K 1/10W 1-216-829-11 METAL CHIP 4.7K 1/10W R514 1-218-867-11 METAL CHIP 6.8K...
  • Page 45 CX-JT8 POWER SENSOR TRANSFORMER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R561 1-216-843-11 METAL CHIP 1/10W 1-687-669-11 SW BOARD R562 1-216-857-11 METAL CHIP 1/10W ********* R563 1-216-214-00 RES-CHIP 4.7K 1/8W < SWITCH > R564 1-216-214-00 RES-CHIP 4.7K...
  • Page 46 CX-JT8 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 0 302 1-792-948-12 CORD, POWER (E) 1-769-939-11 WIRE (FLAT TYPE) (11 CORE) (CIS, E, E51, SP, AUS) 1-773-003-11 WIRE (FLAT TYPE) (15 CORE) (AEP, UK) 1-827-146-11 WIRE (FLAT TYPE) (19 CORE)

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