Page 1
AUDIO D/A CONVERTER BOARD BKPF-L752 MAINTENANCE MANUAL 1st Edition Serial No. 10001 and Higher...
Page 2
Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres. Pour toute réparation faire appel à une personne compétente uniquement. BKPF-L752...
Board Layout This section describes the board layout for the DAC-38 board. The following manual is prepared for this unit..Installation Manual (Supplied with BKPF-L752) This manual describes the information on BKPF-L752 installing. 3 (E)
Therefore, specified parts should be used in the case of replacement. 2. Standardization of Parts Some repair parts supplied by Sony differ from those used for the unit. These are because of parts common- ality and improvement. Parts list has the present standardized repair parts.
(including the case where no signal is input) Green: When a digital audio signal is input to the AES/EBU IN 2 connector Red: When no signal is normally input to the AES/EBU IN 2 connector (including the case where no signal is input) BKPF-L752...
11. Check the voltage. Specification: After adjusting the power supply voltage, be sure to perform “2-4. Input/Output Gain Adjustment”. 4.75 0.05 V dc 4.75 0.05 V dc +25.10 0.05 V dc +12.55 0.15 V dc _12.55 0.15 V dc BKPF-L752...
8. Adjust the CH2 output level on the audio level meter. Adjustment point: 1RV201/DAC-38 (A-2) 4.0 0.1 dBm (at 600 Z load) Specification: BKPF-L752 2-4. Input/Output Gain Adjustment CH3 adjustment 9. Connect the generator to the CH3 input of AUDIO IN connector of the audio A/D converter board (BKPF- L751).
7-621-775-10 s SCREW +B 2.6x4 7-688-002-11 s WASHER 2.6, MIDDLE The components in the connector panel assembly of BKPF-L752 are out of spare parts except above. When component replacement (except above) is required, replace by assembly (including CN-1858/1859 mounted circuit boards) below.
Page 14
8-719-800-76 s DIODE 1SS226 D508 8-719-800-76 s DIODE 1SS226 D511 8-719-800-76 s DIODE 1SS226 D512 8-719-941-09 s DIODE DAP202U D513 8-719-941-09 s DIODE DAP202U D814 8-719-027-84 s LED CL-155UR/G-D, RED/GRN D815 8-719-027-84 s LED CL-155UR/G-D, RED/GRN DD701 1-418-402-11 s CONVERTER UNIT, DC-DC BKPF-L752...
Page 15
Q502 8-729-120-28 s TRANSISTOR 2SC1623-L5L6 Q503 8-729-929-02 s TRANSISTOR DTC124XE Q505 8-729-140-75 s TRANSISTOR 2SD999-CLOCK Q506 8-729-040-87 s TRANSISTOR 2SJ463A BKPF-L752 (DAC-38 BOARD) Ref. No. or Q'ty Part No. SP Description Q507 8-729-028-91 s TRANSISTOR DTA144EUA Q508 8-729-040-87 s TRANSISTOR 2SJ463A...
Page 16
RV101 1-230-749-21 s RES, ADJ, CERMET 5K RV201 1-230-749-21 s RES, ADJ, CERMET 5K RV301 1-230-749-21 s RES, ADJ, CERMET 5K RV401 1-230-749-21 s RES, ADJ, CERMET 5K 1-570-598-11 s SWITCH, DIP 4-CKT 1-760-954-11 s OSCILLATOR, CRYSTAL 6.144 MHz BKPF-L752...
Page 17
DAN217 ... 4-2 DAN217-T146 ... 4-2 DAP202U ... 4-2 DAP202UT106 ... 4-2 BKPF-L752 Section 4 Semiconductors of which functions are equivalent are described here. For parts replacement, refer to the section of Spare Parts in this manual. The circuit diagram of each IC is obtained from the IC data book published by the manufacturer.
Page 19
TC74VHC08FT(EL) (TI) C-MOS QUAD 2-INPUT AND GATES —TOP VIEW— Y = A • B = : LOW LEVEL : HIGH LEVEL BKPF-L752 CS8412-CS (CRYSTAL) CS8412-IS-E1 (CRYSTAL) CS8412-IS-E2 DIGITAL AUDIO INTERFACE RECEIVER —TOP VIEW— C OUT Cd/F1 Cc/F0 Cb/E2 Ca/E1 C0/E0...
Page 20
: ANALOG VOLTAGE (L-CH) : ANALOG VOLTAGE (R-CH) : OSCILLATOR ZERO : ZERO DATA FLAG OTHER : NO CONNECTION LOW-PASS OVERSAMPLING ENHANCED FILTER DIGITAL FILTER MULTI-LEVEL WITH DELTA-SIGMA FUNCTION LOW-PASS MODULATOR CONTROLLER FILTER BPZ-CONT. OPEN DRAIN CRYSTAL/OSC EXTL EXTR ZERO CLKO BKPF-L752...
Page 21
REGISTER PORTS write pulse read pulse POWER-ON RESET SSM-2142P (PMI) BALANCED LINE DRIVER —TOP VIEW— _FORCE +FORCE _SENSE +SENSE BKPF-L752 TL7705ACPS (TI) TL7705ACPSR POWER VOLTAGE SUPERVISOR —TOP VIEW— REF OUT RESIN T IN +2.5 V SENSE RESIN OUT (1) SENSE...