Marantz-PMD-520-F-Service-Manual(1) 电路图 维修手册.pdf

Fully Independent Double Cassette Deck PMD520 418S855020 MIT First Issue 2001.09 PMD520/F1B R PMD520 Printed in Japan Service Manual OVERLAP REC AB A+B HP SELECT HP LEVEL PHONES POWER AUTO REW 5 4 3 2 1 010 9 8 7 6 FINE SPEED BALANCE 5 4 3 2 1 010 9 8 7 6 REC LEVEL DC SERVO CONTROLLED MOTOR / AUTO TAPE SELECTOR 3HEAD L 03+6dB36101520 R STOPPLAYREC MUTEREC AUTO BIAS TAPE TIMERESETRESETTAPE TIME CONT MONITOR TIMERTIMER A+B BIAS RESET BIAS RESET HIGHNORM MONITOR TAPE SPEED L 03+6dB36101520 R DC SERVO CONTROLLED MOTOR / AUTO TAPE SELECTOR 3HEAD STOPPLAYREC MUTEREC AUTO BIAS FULLY INDEPENDENT DOUBLE CASETTE DECK PMD520 REC/PLAYREC/PLAY DOLBY BC NR HX PRO QA01 NJM2068DD (1/2) 1 2 3 8 CA01 100p CA05 0.1u A-GND RA07 2.2k RA09 3.3k 13 2 CA02 100p QA01 NJM2068 (2/2) 7 6 5 4 RA06 220K A-GND RA10 3.3k 13 2 RA08 2.2k RA01 27K RA03 2.7k RA04 2.7k RA02 27K JA02 4 3 2 1 A-GND RA05 220k SA01 3 2 1 6 5 4 JA01 4 3 2 1 0dB -20dB Rch Rch Lch Lch (5) (6) (7) (8) Lch Rch Rch PA01 WA418S5010 (1) (4) (3) (2) PA01 QA01 PMD520FB 74PMD520/02B PMD520U電源部分変更 及 入力 ATT 回路 (PA01) 追加製品。 74PMD520/02B PMD520U相違部分記載。 他部分74PMD520/02B PMD520U (418S8550104822 725 51174) 参照下。 RadioFans.CN 收音机爱 好者资料库 Pos. No. PARTS NO. DESCRIPTION Page PA01 ATT CIRCUIT BOARD PA01 New CA01 DK16101300100pF K 50V PA01 New CA02 DK16101300100pF K 50V PA01 New CA05 DD38104010 0.1F +80%-20% 50V DC PA01 New RA01 GD05273160 27k 5% 1/6W PA01 New RA02 GD05273160 27k 5% 1/6W PA01 New RA03 GD05272160 2.7k 5% 1/6W PA01 New RA04 GD05272160 2.7k 5% 1/6W PA01 New RA05 GD05224160 220k 5% 1/6W PA01 New RA06 GD05224160 220k 5% 1/6W PA01 New RA07 GD05222160 2.2k 5% 1/6W PA01 New RA08 GD05222160 2.2k 5% 1/6W PA01 New RA09 RA03320780VR. 3.3k PA01 New RA10 RA03320780VR. 3.3k PA01 New QA01 HC10053090 IC NJM-2068-DD PA01 New SA01 SS02021710 SW. SSAA22-B NON-SHORTING PA01 New QU01 HS418ST1R Microprocessor(programmed) TMP87PM41N P800 59p J092 YJ04002360 AC INLET 2P SOT-16C Exv. 47p L001 TS15725180MAINS TRANSF. Exv. 47p W001 ZC01801050 MAINS CORD FOR JAPAN Exv. 47p 002T 418S851110 USER GUIDE Exv. 47p * 【変更追加以下部分】 1. TECHNICAL SPECIFICATIONS Input Sensitivity Line A (F). 1V Line B (F). 100mV Input Impedance Line A (F).25k Line B (F).100k Power Supply Power Requirement F Version .100V AC 50/60Hz 2. LEVEL DIAGRAM -30 -20 -10 0 10 LEVEL dBV LEVEL DIAGRAM -26.9dBV 3 B QF02 A QF01 2 LINE INPUT 400Hz 1 -3.9dBV B QG41 A QG01 REC VOL.CENTER 1 2 3 4 5 6 7 89 10 11 12 METAL HIGH NORMAL -5.4dBV 1 1 20 25 15 2 RadioFans.CN 收音机爱 好者资料库 3 Line A input Loop Through out Line B input A A,B A, B A B:Rec VR A:Rec VR Count Rec sw A 0dB -20dB 3. BLOCK DIAGRAM LINE_A_L1 LINE_A_R1 A-GND JP01 JP02 JG01 7 8 10 9 A-GND 4.7/25v CG05 4.7/25v CG06 QG01 NJM4558 7 6 5 8 QG01 1 2 3 4 2.2k RG05 2.2k RG06 220k RG03 220k RG04 22/16v CG03 22/16v CG04 VCC/2_A VCC/2_A 100p CG01 100p CG02 220k RG01 220k RG02 0.1 CG30 +12V A-GND 1.5k RG94 VCC/2_A 3.3k RG91 1.5k RG93 3.3k RG92 JG01 1 2 3 22/16v CG07 22/16v CG08 JG52 1 2 3 4 JG51 1 2 3 4 LINE_A_R1 LINE_A_L1 L R LOOP THROUGH OUT 6V 6V 6V 6V 6V 6V A LINE AMP,SELECTOR INPUT L R LINE A (3/3) (1/3) 4. CONNECTION DIAGRAM PA01 PG01 基板上。 5. SCHEMATIC DIAGRAM LINE A OUT LEVEL ADJ 部 (PG01-1/8:13p 参照 ) 電源部 USA Version 同回路図 (P851:31p 参照 ) RadioFans.CN 收音机爱 好者资料库 4 6. EXPLODED VIEW P G 0 1 5 1 2 8 3 X 8 ( M ) 5 1 2 8 3 X 8 ( M ) 5 1 2 8 3 X 8 ( M ) 5 1 2 8 3 X 8 ( M ) 9 0 0 G 9 0 8 G ( UO N L Y ) 5 1 5 0 3 X 8 ( U ) J 0 9 2 P A 0 1 F O N L Y 9. ELECTRICAL ADJUSTMENTS 調整部 3 箇所 (51p, 53p 参照 ) 2. S.R.L Setting 1) Apply a 1kHz, Line A : 1100 mV(F) / 100 mV(U, /02), Line B : 100 mV to the LINE INPUT jacks. 2) Put the unit in RECORD mode and adjust the REC LEVEL control to obtain 388 mV of signal at the DOLBY test points J601 (Deck A) and J651 (Deck B). 3) Adjust the output of the audio oscillator applied to the LINE INPUT jacks to 70.8 mV (-3 dB). This is the rated recording condition for the STANDARD RECORDING LEVEL (S.R.L.). 9.4 LINE OUTPUT LEVEL ADJUSTMENT 1) Connect the audio oscillator to the LINE INPUT jacks. 2) Connect the VTVM to LINE OUTPUT jacks. 3) Set the MONITOR switch to the source position. 4) Set the REC volume to the center click position. 5) Supply 100 mV to the LINE INPUT jacks. 6) Adjust the following semi-fixed resistor to set Line A : 1100 mV(F) / 100 mV(U, /02), Line B : 100 mV from the LINE OUTPUT jacks; 注：Line A SW. : SA01(PA01) -20dB 側。 9.7REC/PLAY-BACK FREQUENCY RESPONSE ADJUSTMENT 1) Insert the AC-225 tape in the holder. 2) Set the REC volume to the center position. 3) Supply 1kHz Line A : 330 mV(F) / 30 mV(U, /02), Line B : 30 mV to the line input jacks. 4) Record the 400Hz and 12.5kHz signals by turns. 5) Playback the section just recorded, and adjust the following semi-fixed resistor so that the level of dif- ferences between 400Hz and 12.5kHz are within 1.0dB; 6) Only check HIGH POSITION and METAL tapes. CH. ADJUSTMENT POINT MECHA. L R901 A R R902 A L R951 B R R952 B CH. ADJUSTMENT POINT MECHA. Ver. L RA09 (SA01:-20dB, PA01) A F R RA10 (SA01:-20dB, PA01) A F L RG91 A U, /02 R RG92 A U, /02 L RG95 B R RG96 B