Aiwa XR-MK25 Service Manual
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Aiwa XR-MK25 Service Manual

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Summary of Contents for Aiwa XR-MK25

  • Page 3 λ...
  • Page 4 PICK–UP Assy P.C.B. PICK–UP Assy P.C.B. Solder Solder...

  • Page 9: Transistor Illustration

    TRANSISTOR ILLUSTRATION E C B E C B E C B 2SA1296 2SC4115 2SA952 2SC2878 DTA144ES CSD655E KTA1266 DTC144ES KTC3198 CHIP RESISTOR PART CODE Chip Resistor Part Coding Figure E C B E C B B C E Resistor Code Value of resistor 2SA1318 KTA1267...
  • Page 10 BLOCK DIAGRAM – 1 (MAIN / FRONT / AC2 / AC1 / DECK / RELAY)
  • Page 11 BLOCK DIAGRAM – 2 (VCD / VCD POWER / CD DRIVE / CD MOTOR)

  • Page 12: Wiring - 1 (Main)

    WIRING – 1 (MAIN)
  • Page 13 SCHEMATIC DIAGRAM – 1 (MAIN:1/2 / AC2 / AC1 / RELAY)
  • Page 14 SCHEMATIC DIAGRAM – 2 (MAIN:2/2 – TUNER BLOCK)
  • Page 16 WIRING – 2 (FRONT / DECK / RELAY)

  • Page 17: Schematic Diagram - 3 (Front / Deck)

    SCHEMATIC DIAGRAM – 3 (FRONT / DECK)
  • Page 18 WIRING – 3 (VCD:1/2 / VCD POWER / CD DRIVE / CD MOTOR)
  • Page 19 WIRING – 3 (VCD:2/2)
  • Page 20 SCHEMATIC DIAGRAM – 4 (VCD:1/2 / VCD POWER / CD DRIVE / CD MOTOR)

  • Page 21: Schematic Diagram - 5 (Vcd:2/2)

    SCHEMATIC DIAGRAM – 5 (VCD:2/2)
  • Page 22 FL (11BT–162GK) GRID ASSIGNMENT / ANODE CONNECTION WIRING – 4 (AC2 / AC1) GRID ASSIGNMENT ANODE CONNECTION...
  • Page 37 IC, MB89627R-361 Pin No. Pin Name Description Pin No. Pin Name Description SSP, DSP Control Clock. ENCRST Video Encoder Reset. (Not used) DATA SSP, DSP Control Data. DVCC – DVCC. SENS SSP, DSP Status. PAL/PAL60 PAL/PAL60 Switch. XLAT SSP, DSP Command Latch. XNTSC PAL/NTSC Switch.

  • Page 38: Practical Service Figure

    ADJUSTMENT – 1 <TUNER> PRACTICAL SERVICE FIGURE 7. DC Balance / Mono Distortion Adjustment <TUNER SECTION> Settings : • Test point : TP5, TP6 (DC balance) <FM SECTION> MAIN C.B TP8, TP9 IHF Sensitivity : Less than 10dB (Distortion) (THD 3%) [at 87.5MHz] •...
  • Page 39 F DECK C.B PIN1 SFR1 DECK R / P / E HEAD...

  • Page 40: Eye Pattern

    VCD C.B SFR701 SFR702 (TE) IC701 SFR703 (RF) (VC) (TG1) (TG2) 1.4 ± 0.1 Vp-p Oscilloscope (DC range) EYE PATTERN VOLT / DIV: 0.5 V must be CLEAR and MAX TIME / DIV: 0.5µs Ω TP1 (RF) TP2 (VC) KSS-213F 50.2mA 18553 KA502...
  • Page 41 2. Tracking Balance Adjustment 4) Adjust SFR703 so that the waveform appears as High tracking gain Gain Focus) Tracking Symptoms shown in the figure below. (tracking gain (The frequency of the fundamental wave is higher Oscilloscope adjustment) than in low gain.) (DC range) •...

  • Page 42: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 1/1 XR-M25 3ZG-3 YC1NM FRONT C.B VCD C.B FL301 MAIN C.B AC1 C.B WIRE ASSY, IP (GND) POWER C. B AC2 C.B PT101 WIRE ASSY, IP(SEC) FROM VCD C.B HT-SINK ASSY WIRE ASSY, 1P (DECK) PLATE, SHLD CHAS MAIN 2ZM-1 YR6N...

  • Page 43: Mechanical Parts List

    MECHANICAL PARTS LIST 1 / 1 SPRING APPLICATION POSITION REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 82-ZM1-257-010 82-ZM1-218-010 SPR-T,CAS SPR-E,HB 82-ZM1-285-410 82-ZM1-244-010 SPR-C,BT L SPR-C,BT 82-ZM3-323-010 SPR-T,LINK...

  • Page 44: Tape Mechanism Exploded View

    TAPE MECHANISM EXPLODED VIEW 1 / 1 DECK C.B SOL2 RELAY C.B HLDR WIRE 3...
  • Page 46 CUSH-G, MAIN A CUSH-G, MAIN A 3ZG2 CD MOTOR C.B...
  • Page 48 CD DRIVE C.B...

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