Arcam-CD82-cd-sm维修电路原理图.pdf

CD82DiVA CD82 Compact Disc Player (Text)Service Manual ARCAMIssue 1.0RadioFans.CN 收音机爱 好者资料库 Contents List Section Issue Service guide ! Technical specification - ! CD82 upgrade instructions - Main board L934 ! Circuit description - ! Component overlay 5.0 ! Parts list 4.1 ! Circuit diagrams 4.1 DAC board L949 ! Component overlay 3.0 ! Parts list 3.05 ! Circuit diagrams 3.0 Mechanical Mechanical parts list - RadioFans.CN 收音机爱 好者资料库 Service Guide Contents ! Technical specification ! CD82 Upgrade fitting instructions CD82 Technical Specifications Digital to Analogue conversion DAC Dual mono 24 bit Wolfson Laser pick-up 3 beam Laser wavelength 780nm Numeric aperture 0.45 Dynamic range 106dB Signal to noise ratio (CCIR) 100dB Harmonic distortion (0dB, 1kHz) 0.005% Frequency response (+-0.5dB) 5Hz-20kHz Output level (0dB) 2.3Vrms Output impedance 50 ohm Minimum recommended load 5k ohm General Digital output connection 75 ohm co-axial Power consumption 35VA Dimensions (including feet) W430 x D290 x H84mm Weight (net) 5.5kg Weight (packed) 7.0kg Supplied accessories Mains lead CR314 remote control 2 x AAA batteries DiVA CD82 UPGRADE FITTING INSTRUCTIONS Compatible with: Alpha 7, 7SE, 8, 8SE CD players DiVA CD72, CD72 (text) CD players Note When converting from 8SE to CD82 you will no longer be able to decode the extra information on the few HDCD discs available, however the sound quality offered by the CD82 upgrade is significantly superior on all discs to that of the original 8SE. Kit Contents 1x CD82 DAC module L951AY 1x Upgrade instruction sheet E836UI 1x Silver CD82 drawer front assembly E993AY 1x Black CD82 drawer front assembly E993AYB 2x PCB support locking pillars H037 5x Self tapping screws HF4V09B 1x Product registration card SH000 1x CD82 authentication label E954SL 1x Surface cleaner wipe F227 Upgrading an Alpha 7/7SE, 8/8SE to CD82 DAC For 7/7SE follow steps 1,2,3A onwards (not 3B) For 8/8SE follow steps 1,2,3B onwards (not 3A) 1. Disconnect the mains supply from the Alpha CD player. 2. Remove the top cover by taking out the 2 screws from the top edge of the rear panel marked ! (Pozi no.1 driver required and on each side marked (Pozi no.2 driver required). 3A. For Alpha 7/7SE to DiVA CD82 DAC upgrade only Pull off the sticky plastic gasket between the digital output socket and the audio output sockets to reveal the 4 audio output socket holes through which the DAC sockets will pass. Any remnants of adhesive can be removed by rubbing it gently with your finger and rolling it off. We do not recommend the use of solvents. Fit the 2 supplied PCB (printed circuit board) pillars to the holes in the main board on either side of the flex foil coming from the display board, these are marked # in figure 1. The big end of each PCB pillar goes into the main PCB, these push in and clip home. Take great care not to damage the main circuit board. Remove the Alpha 7/7SE Configuration Module (the small vertically mounted PCB in the centre of the main board). It will not be needed once the new DAC board is fitted. Note: The original nickel-plated audio output sockets are no longer connected after the upgrade and cannot be used. However the digital output still functions. 3B. For Alpha 8/8SE to DiVA CD82 DAC upgrade only Remove the 5 screws holding the Alpha 8/8SE board in place. Squeeze the top of the two PCB pillars supporting the end of the aluminium extrusion and lift the extrusion up and out of the unit. If the flex foils do not come away with the DAC board then remove them as well. 4. Take static precautions first. With the aluminium extrusion of the CD82 DAC module uppermost fit the flex foils from the module into the appropriate sockets in the main board, ensuring they are pushed fully home. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module slightly upwards to achieve this. 5. Push the module down firmly on to the support pillars, ensure it is latched in place. 6. Fit the supplied screws with integral washers to the 5 points marked $ in figure 1 (T10 Torq driver required) to hold the module in place. 7. Refit the top cover and attach the CD82 authentication label to the underside of the CD player Upgrading a CD72 to CD82 1. Disconnect the mains supply from the DiVA CD player. 2. Remove the top cover by taking out the 3 screws from the top edge of the rear panel marked ! (T10 Torq driver required) and on each side marked (T20 Torq driver required) in figure 1. 3. Pull off the sticky plastic gasket between the digital output socket and the audio output sockets to reveal the 4 audio output socket holes through which the DAC board sockets will pass. 4. Any remnants of adhesive can be removed by rubbing it gently with your finger and rolling it off. We do not recommend the use of solvents. 5. Fit the 2 supplied PCB (printed circuit board) pillars to the holes in the main board on either side of the flex foil coming from the display board, these are marked # in figure 1. The big end of each PCB pillar goes into the main PCB, these push in and clip home. Take great care not to damage the main circuit board. 6. Remove the Configuration Module (the small vertically mounted PCB in the centre of the main board). It will not be needed once the new DAC board is fitted. 7. Note: The original nickel-plated audio output sockets are no longer connected after the upgrade and cannot be used. However the digital output still functions. 8. Remove the following jumpers: - PL2, PL3, PL4, PL6 Fit the following jumpers: - PL5, PL7 9. Take static precautions first. With the aluminium extrusion of the CD82 DAC module uppermost fit the flex foils from the module into the appropriate sockets in the main board, ensuring they are pushed fully home. If they are not pushed fully home, the unit may not read discs. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module slightly upwards to achieve this. 10. Push the module down firmly on to the support pillars, ensure it is latched in place. 11. Fit the supplied screws with integral washers to the 5 points marked $ in figure 1 (T10 Torq driver required) to hold the module in place. Refit the top cover. 12. Removing the drawer front - connect a mains supply to the unit; press load and allow the tray to fully open; remove the mains supply from the unit. Hold the drawer tightly with one hand and with the other pull the drawer front forward away from the player (pull hard). Remove any remnants of tape from the drawer front mechanism; clean the drawer mechanism front using the surface cleaner wipe provided. 13. Fitting the new CD82 drawer front - connect a mains supply to the unit and allow the drawer to close automatically. Remove the backing from the tape attached to the new drawer front and carefully align the drawer front with the mechanism and press gently together; reposition the drawer front if necessary and press firmly to the unit. Upgrading a CD72 (TEXT) to CD82 (TEXT) 1. Disconnect the mains supply from the DiVA CD player. 2. Remove the top cover by taking out the 3 screws from the top edge of the rear panel marked ! (T10 Torq driver required) and on each side marked (T20 Torq driver required) in figure 1. 3. Pull off the sticky plastic gasket between the digital output socket and the audio output sockets to reveal the 4 audio output socket holes through which the DAC board sockets will pass. 4. Any remnants of adhesive can be removed by rubbing it gently with your finger and rolling it off. We do not recommend the use of solvents. 5. Fit the 2 supplied PCB (printed circuit board) pillars to the holes in the main board on either side of the flex foil coming from the display board, these are marked # in figure 1. The big end of each PCB pillar goes into the main PCB, these push in and clip home. Take great care not to damage the main circuit board. 6. Note: The original nickel-plated audio output sockets are no longer connected after the upgrade and cannot be used. However the digital output still functions. 7. Set the main board jumper settings as listed below: - PL200 ON PL201 ON PL202 ON PL203 OFF PL204 ON PL205 OFF PL300 2 and 3 PL400 OFF PL401 OFF PL402 OFF 8. Take static precautions first. With the aluminium extrusion of the DAC module uppermost fit the flex foils from the module into the appropriate sockets in the main board, ensuring they are pushed fully home. If they are not pushed fully home, the unit may not read discs. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module slightly upwards to achieve this. 9. Push the module down firmly on to the support pillars, ensure it is latched in place. 10. Fit the supplied screws with integral washers to the 5 points marked $ on figure 1 (T10 Torq driver required) to secure the module in place. Refit the top cover. 11. Removing the drawer front - connect a mains supply to the unit; press load and allow the tray to fully open; remove the mains supply from the unit. Hold the drawer tightly with one hand and with the other pull the drawer front forward away from the player (pull hard). Remove any remnants of tape from the drawer front mechanism; clean the drawer mechanism front using the surface cleaner wipe provided. 12. Fitting the new CD82 drawer front - connect a mains supply to the unit and allow the drawer to close automatically. Remove the backing from the tape attached to the new drawer front and carefully align the drawer front with the mechanism and press gently together; reposition the drawer front if necessary and press firmly to the unit. Figure 1 Main Board L934 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams CD72, CD82 & CD92 (text) Circuit Description Summary The main Motherboard/Display PCBs for the Diva CD players may be assembled as three different versions: ! DiVA CD62 (text) - With alternate components fitted and the 92DAC upgrade connections omitted (L933AY). ! DiVA CD72 (text) - With the standard set of components fitted (L899AY). ! DiVA CD82/92 (text) - With analogue components and connectors omitted, for use as a host motherboard for the plug-in 82 or 92DAC (L934AY). The CD72T version may be converted for use with an upgrade plug-in DAC board by changing on-board jumpers. All systems are based on a Sony kit, comprising CDM14BL-5BD25 CD transport / loader / laser mechanism, micro-controller and fluorescent display. Power Supplies The CD72, CD82 & CD92 transformers :- ! 230/115VAC - part number L866TX ! 100VAC only - part number L851TX The mains transformer has three secondary windings: 1. 13.7V 0V 13.7V to provide 12V(A) supplies (IC201 and IC205) for the audio output circuitry via regulators IC201 and IC205. 2. 9V-0V-32V to produce the digital, motor drive and fluorescent display grid supplies: +11V(U) Unregulated supply for relay drive and +5V(D) supply +7V (IC200) Mechanism and motor driver supply +5V(D) (IC202) General digital logic supply +5V(A) (IC203) Supply to DAC -30V (IC204) Display grid voltage. 3. 0-5V to provide an AC supply for the display filament. All of these supplies are delivered also to the optional CD82 or CD92DAC upgrade board via the DAC power connector SK203. The supplies are conventional and are linearly regulated by 3-terminal voltage regulators. When the DAC upgrade board is used, analogue regulators IC201 and IC205 can be bypassed by removing JP203 and JP205, and fitting JP202 and JP204 since regulation is contained on the DAC board itself. Soft-charging resistors R204 and R205 are bypassed similarly. Relay Mute Control This circuit drives a relay to un-mute the analogue output 5 seconds after the unit is powered on, and quickly mutes the output when the unit is switched off. The circuit works effectively as an “AND” gate. If AC is present on the transformer secondary winding and the 5-second timer composed of R222 and C221 has reached the threshold voltage (Vbe of TR200 + Vbe of TR201 - Vce of TR202, or 1.0V), the relay coil is connected to +11V (referenced to 0V_3 as required by the DACs internal circuitry) via TR204. When AC is removed, C231 discharges quickly through R225, the base voltage of TR204 rises and the relay coil voltage is removed, muting the output. TR203 resets the timer by discharging C221 quickly at turn-off. Remote Control/PIC Micro Remote control data is received from the IREye on the display PCB and buffered by TR300 and TR301. The Programmable Interrupt Controller converts the RC-5 format data into the NEC format required by the Sony micro. The PIC also controls the configuration of the digital filter/DAC on the DAC board. Motor Driver The status of the drawer is indicated to the micro by two micro switches INSW and OUTSW on SK205. The micro controls the drawer motor via driver IC303. Clock Buffering The clock and data signals LRCK, ADATA and BCLK from the mechanism connector SK300 are double buffered by IC300 before being delivered to the DAC. Power-On/Reset The power-on reset signal XRST (or RESET) is generated by R409, C410 and IC404. When the power is turned on, C410 is initially uncharged and pin 11 of IC404 is at high voltage, and thus the output is low. After a short time, C410 is charged via R409; IC404 pin 11 is then low, and the output switches high (RESET is de-asserted). DAC & System Clock The DAC is a Burr Brown PCM1716E, the DAC is configured for hardware control. Digital audio is input on pins 1, 2 & 3 in standard Red Book Audio format, i.e. Word Clock, Bit Clock and Data. The system clock is based around 16.9344 MHZ crystal X400 and transistor TR402. This produces a stable clock with low jitter. IC404A & B buffer the clock as linear buffers. IC404C & D buffer the individual mech & DAC clock lines. The CD82 & CD92 system clock is generated on the DAC board. The clock and data signals LRCK, ADATA and BCLK from the mechanism connector SK300 are double buffered by IC300 before being delivered to the DAC. The system clock is delivered to the mech via two-position jumper PL300. The clock source is selected to be either from the main board (CD62/72) or from the DAC board (CD82/CD92) by the position of JP300. When the 82 or 92DAC is fitted as an upgrade to a CD72, removing JP400 disables the main board clock Analogue Output Left channel: IC400A and IC400B are cascaded 69kHz 2nd order low-pass Bessel filters. The output devices internal to both op-amps in IC400 are “pulled down” to the negative supply rail to force operation in class A (one output device is conducting at all times and crossover distortion is eliminated). IC402A is a DC servo with a very low cut off frequency, acting to impose a non-zero voltage virtual earth at the non-inverting input of IC400B, thus eliminating the offsets caused by the pull-down resistors and DC-coupling the ou