Biamp EQ2818 Specifications

n AMPLIFIER SECTIONRMS output powerTHD 10%, both channels driven1 kHz(Low channel) 90 W per channel (5 Ω)10 kHz(High channel) 90 W per channel (5 Ω)To

10SA-AK330GC / SA-AK330GN

Ref. No. Part No. Part Name & Description RemarksR5 ERDS2TJ564T 560K 1/4W [M]R6 ERDS2TJ391T 390 1/4W [M]R7 ERDS2TJ272T 2.7K 1/4W [M]R8 ERDS2TJ684T

Ref. No. Part No. Part Name & Description RemarksR2511 ERJ3GEYJ104V 100K 1/16W [M]R2512 ERJ3GEY0R00V 0 1/16W [M]R2513 ERJ3GEYJ102V 1K 1/16W [M]R25

Ref. No. Part No. Part Name & Description RemarksR2916 ERJ3GEYJ472V 4.7K 1/16W [M]R2917 ERJ3GEY0R00V 0 1/16W [M]R2918 ERJ3GEYJ103V 10K 1/16W [M]R2

Ref. No. Part No. Part Name & Description RemarksR6601 ERDS2TJ471T 470 1/4W [M]R6602 ERDS2TJ471T 470 1/4W [M]R6603 ERDS2TJ221T 220 1/4W [M]R6604 E

Ref. No. Part No. Part Name & Description RemarksC2251 ECA1CM100B 10 16V [M]C2266 ECJ1VB1H102K 1000P 50V [M]C2281 ECJ1VB1H822K 8200P 50V [M]C2282

Ref. No. Part No. Part Name & Description RemarksC5812 ECEA1EKA330B 33 25V [M]C5813 ECEA1EKA100B 10 25V [M]C5814 ECBT1H103KB5 0.01 50V [M]C5820 EC

22.6. Packaging106SA-AK330GC / SA-AK330GNPRT0411 P/S/J/N/A/E

9 Disassembly and Assembly of Main Component“ATTENTION SERVICER”Some chassis components may have sharp edges. Be careful when disassembling and servic

9.2. Gear for servicing (jig) Information 1. This unit has a gear which is used for checking items (Open/Close of disc tray, up/down operation of trav

Step 1 Remove 2 screws at each side and 5 screws at rearpanel.Step 2 Lift up both sides of the top cabinet, push the topcabinet towards the rear and r

Step 6 Press the POWER button to turn the power off. · [Opening the disc tray manually (Using service tools)]Step 1 Insert the gear tool into t

Step 1 Remove 7 screws and disconnect wire CN2810 (Fan) atrear cabinet as shown.Step 1 Remove one screw at rear panel.Step 2 Detach the FFC wires (CN2

Step 1 Disconnect FFC wires CN2803 & CN2806 from MainP.C.B.Step 1 Remove the 2 screws fixed at heat sink and 1 screwfixed at Power P.C.B..Note:Ins

Step 1 Remove 2 screws fixed to the Power Amplifier IC and 1screw to Voltage Regulator.Step 2 Break the joint with a metal cutter as shown below.Step

Step 1 Lay the unit as shown below.Step 2 Release 2 claws at bottom and 2 claws each side, drawthe front panel ass’y forward.Step 3 Remove volume knob

Step 7 Unsolder the motor terminals.Step 1 Remove the CD changer unit.Step 2 Insert the gear with hexagonal wrench into the hole.Step 3 Rotate the hex

CD 44.1 kHzDecoding 16 bit linearDigital filter 8fsD/A converter MASH (1 bit DAC)PickupWavelength 780 nmBeam Source Semiconductor laserAudio output (D

Step 6 Lift up the traverse deck ass’y.Step 7 Remove the traverse deck ass’y from the timing lever.Caution:When removing or inserting the traverse dec

Note:Be careful not to lose the 3 floating spring because those willalso be removed on removal of the traverse deck ass’y. · Installation of th

Step 1 Remove 4 screws.Step 2 Remove the upper plate.Step 3 Remove 3 screws.Step 4 With lifting the claw in the direction of (1), draw the CDDetect P.

Step 8 Release the both claws, and then draw the disc tray.Step 9 With forcing the left guide bar manually because the leftguide bar interfers with cl

Step 1 Remove 3 screws.Step 2 Release the claw, and then remove the gear holder.Step 3 Remove the belt and change gear spring.NOTE:Take care not to lo

Step 9 Pressing the claw (B) in the direction of arrow (1), forcethe connection lever in the direction of arrow (2).Step 10 Move the slide plate 1 to

Step 13 Remove the traverse relay gear, traverse cam gearand drive gear.[Dissassembly/reassembly for the spindle base unit]Step 1 Draw the 5 disc spac

NOTE:Hold the loading stopper ass’y manually bacause it is flipped byspring.Step 6 Remove the cushion spring.Step 7 Remove the loading stopper ass’y i

Step 12 Squeeze the shaft of lower hook, and then draw it.Step 13 Rotate the lower spindle in the direction of arrow untilthe lower spindle interferes

Step 1 Install the traverse cam gear.Step 2 Rotate the traverse cam gear to the direction of arrow.Step 3 Install the drive gear and traverse relay ge

16.2. (B) Main (Tuner) Circuit 60 16.3. (B) Main Circuit 61 16.4. (C) Panel Circuit 66 16.5. (D) Transformer Circuit, (E) CD Detect Circuit, (F) Spi

Step 7 Move the slide plate 1 to forward fully.Step 8 Install the rear lock. (The claw should be latched.)Step 9 Install the Spindle Position P.C.B..

Step 1 Install the belt temporarily.NOTE:Take care not apply the grease to the belt.Step 2 Upset the CD loading unit.Step 3 Remove 3 screws.Step 4 Uns

* The mechanism as shown below is for DECK1. For DECK2, perform the same procedures.Step 1 Release the 2 claws, and then remove the headconnector.Step

Step 4 Remove 3 screws.Step 5 Remove the flywheel R.Step 6 Release the claw of tape side, and then remove thewinding lever and spring.Step 7 Remove th

Step 7 Put the capstan belt A temporarily as shown below.Step 8 Put the capstan belt B on the motor ass’y pulley.Step 9 Install the sub chassis to the

Step 1 Lift up the lever upward, open the cassette lid ass’y.(For DECK1 and DECK2)Step 2 Push up the cassette lid ass’y in the direction of arrow.(For

Step 1 If a cassette tape cannot be removed from the deck (thetape is caught by the capstan or pinch roller during playback orrecording), rotate the f

10 Checking for major P.C.B.Note:Checking of all major P.C.Bs (Main P.C.B., Panel P.C.B., Transformer P.C.B., Deck P.C.B., Deck Mechanism P.C.B. and P

10.2. Checking of Transformer P.C.B. 1. Remove Top Cabinet and Rear Panel. 2. Remove CD Lid. 3. Disassemble CD Mechanism Unit. 4. Connect FFC wires (C

10.3. Checking of Panel, Deck & Deck Mechanism P.C.B. 1. Remove Top Cabinet. 2. Remove CD Lid. 3. Disassemble CD Mechanism Unit. 4. Remove volume

1 Before Repair and AdjustmentDisconnect AC power, discharge Power Supply Capacitors C5820 and C5840 through a 10Ω, 5W resistor to ground.DO NOT SHORT

10.4. Checking of Power P.C.B. 1. Remove Top Cabinet and Rear Panel. 2. Remove CD Lid. 3. Disassemble CD Mechanism Unit. 4. Remove 3 screws at Transfo

11 Self-Diagnostic Function11.1. Self-diagnostic displayThis unit is equipped with a self-diagnostic display function which, will display an error cod

3. Press to close the tray. 4. Press “CD DIRECT PLAY (5)” andwait until the tray is open. 5. Pressand remove the CD. 6. Pressto close the tray. 7. Pr

11.8.3. Power supply related error detectionNo. Abnormal Items Error Display Method of Detection1 POWER AMP output abnormal F61 During normal operatio

12 CD Test Mode FunctionThis CD test mode is provided to check CD unit without connecting to changer loading mechanism. This mode shall operate CDPLAY

· It shall move up one counter when the above operations ends. The counter will reset to 00000 when 99999 is reached. · To exit CD agin

13.1. Cassette Deck Section · Measurement Condition − − − − Make sure head, capstan and press roller are clean. − − − − Judgeable room te

Fig.613.2.2. AM RF Adjustment 1. Connect the instrument as shown in Fig. 7. 2. Set the unit to AM mode. 3. Set AM-SG to 520kHz. 4. Receive 520kHz in t

14 Block DiagramT-T+F+F-PHOTO DETECTOROPTICAL PICKUPSEMICONDUCTORLASERQ7601LASERPOWER DRIVEM7302SPINDLEMOTORRESETSIGNALGENERATORFOCUSCOILDRIVETRACKING

MN6627953HBSERVO PROCESSORDIGITAL SIGNALPROCESSOR/DIGITAL FILTER/D/A CONVERTERTO MAIN BLOCKIC7002NTEST60IOMODE59NRST68TIMING GENERATOR71X170X2(SMCK)(P

3 Prevention of Electro Static Discharge (ESD) toElectrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easil

IC2601LA1833NMNTLMFM/AM IF AMP,DET/AM OSC,MIX/FM MPXSDSTSHIFT REGISTER LATCH12SWALLOW COUNTER1/6,1/17,4 BITS12 BITS PROGRAMMABLEDIVIDERREFERENCEDIVIDE

MOTOR DRIVEC0GAM0000005IC1IC2801C2CBJG000564MICROPROCESSORREGMLDMCLKCEMDATASDCD_RSTSWITCHBLKCKPLLCLKST/DOPLLDAQ2906STATQ2907RM1SWITCHC0HBB0000044FL DR

AN7348S-E1P.B EQ/REC AMP/ALC/TPS AMPIC1001C1AA00000612R/P SELECTIC1004IC971PHOTOINTERRUPTERCNB13030R2AUQ1003SWITCHING(BEAT PROOF/RECH)L1002BIAS OSCCON

IC2803C1BB00000732AUDIO SOUNDPROCESSORJK2801AUXQ2511,Q2512HPF FREQAMPSWITCHQ2181 (Q2281)HP_L(R)SWITCHMUTINGCONTROLQ2501Q2142 (Q2242)SI18SC1726ASP_DAT2

E5800RSN315H42C-PPOWER HICIC5801Q5812, Q5813T5950SYNCDC_DETFANSYNCDC_DETHP _SWHP_SWJK6551HEADPHONEDC DETECTSWITCHVOLTAGEREGULATOR(-VP)D5959Q5951POWER

15 Voltage Measurement55SA-AK330GC / SA-AK330GN

56SA-AK330GC / SA-AK330GN

(All schematic diagrams may be modified at any time with thedevelopment of the new technology)Note:SW1 : Push switchSW2 : Push switchSW3 : Open switch

16.1. (A) CD Servo Circuit: CD-DA SIGNAL LINEIC7003AN8739SBTE2FOCUS COIL/TRACKING COIL/TRAVERSE MOTOR/SPINDLE MOTOR DRIVER76014.7CN7001Q7601Q7601B1ADC

: CD-DA SIGNAL LINECN700216REST SW1/RSTBLKCKMLDMDATAMCLKP.GND+7.5VLD SWD.GND+3.3VRCH OUTA.GNDS7201REST SWC72430.1IC7002MN6627953HBSERVO PROCESSORDIGIT

5 Handling Precautions For Traverse DeckThe laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by sta

16.2. (B) Main (Tuner) CircuitMAIN (TUNER) CIRCUITSCHEMATIC DIAGRAM - 3C26471000PJK2601IC2602LC72131MDTRMPLL FREQUENCY SYNTHESIZERIC2601LA1833NMNTLMFM

16.3. (B) Main CircuitMAIN CIRCUITSCHEMATIC DIAGRAM - 41413121110246897531CN2805BOTTOMSWPLUNGERPOSITION5VDGNDCD_SW2PGNDCD_SW1OPENCLAMPCHG_CCWCD8VCHG_H

MAIN CIRCUITSCHEMATIC DIAGRAM - 5TOCD SERVO CIRCUIT(CN7002) ONSCHEMATIC DIAGRAM-2CN2801: +B SIGNAL LINE: CD SIGNAL LINE: MAIN SIGNAL LINECN2806R22713.

MAIN CIRCUITSCHEMATIC DIAGRAM - 6: +B SIGNAL LINER233222KR2591330K+9VR23310R23330C23320D2332B0ADCC000002C23340.22R2337470KR23381KLM_LR25371KQ2511B1GDC

R2834434445464748495042414039383736353433323130292827261009998979695949392919089888786858182838425242322212019181716151413121110987654321DCDETPCONTEE_

TOPOWERCIRCUIT(CN5800) ONSCHEMATICDIAGRAM-12CN2809MAIN CIRCUITSCHEMATIC DIAGRAM - 8TOPOWERCIRCUIT(CN5801) ONSCHEMATICDIAGRAM-12CN2808TOMAIN (TUNER)CIR

16.4. (C) Panel Circuit: MAIN SIGNAL LINEH6555/W6555-VPFL2FL1SYS6VSYS6VSTGNDDGNDPCONTSYNC986421357TOTRANSFORMER CIRCUIT(CN5951) ONSCHEMATIC DIAGRAM-11

SCHEMATIC DIAGRAM - 10PANEL CIRCUITCN6601HALFMODE_1PLG2RMTSSEQ_LEDVREF+SW5VSYNCSYS6V: +B SIGNAL LINE : -B SIGNAL LINETOMAIN CIRCUIT(CN2806) ONSCHEMATI

16.5. (D) Transformer Circuit, (E) CD Detect Circuit, (F) Spindle PositionCircuit & (G) CD Loading CircuitTOPANELCIRCUIT(H6555/W6555) ONSCHEMATICD

16.6. (H) Power CircuitCN5801CN5800-9V+9VMOT10VSW 5VCD8VUP GNDD_GNDP_GNDTOMAINCIRCUIT(CN2809)ONSCHEMATICDIAGRAM-8TOMAINCIRCUIT(CN2808)ONSCHEMATICDIAGR

6 Precaution of Laser DiodeCaution :This product utilizes a laser diode with the unit turned "ON", invisible laser radiation is emitted from

16.7. (I) Deck Circuit & (J) Deck Mechanism CircuitCS1001SCHEMATIC DIAGRAM -13DECK CIRCUITCS1002L10027L1A62N65432112342122232452061971881791610151

SCHEMATIC DIAGRAM - 14DECK CIRCUITTOMAIN CIRCUIT (CN2803) ONSCHEMATIC DIAGRAM-4R10842.2KR10862.2KR10490R10910R10500R10920R108747KR108547KC10640R10572.

17 Printed Circuit BoardNote: Circuit board diagrams may be modified at any time with the development of new technology.17.1. (A) CD Servo P.C.B.ABCDE

17.2. (B) Main P.C.B.ABCDEFG123456789GMAIN P.C.B (REPX0442B...GC) (REPX0442C...GN)B5178111001114-RG144N12121N11223579111346810 12 1

GGHI J KL M1730803181515011001111122311 10 9 8 7 6 5 4 3 2 13579111314121086421632 1185435791113151719212325272930282624222018161412108642357911131516

17.3. (C) Panel P.C.B.ABCDEFG123456789GPANEL P.C.B (REPX0441A)CBCEBCEBCEBCES6106S6105S6104S6103S6102S6101S6207S6206S6208S6205S6204S6203H6555/W6555JK65

GGHI J KL MBCEBCEPbFBCES6301S6303S6210S6209S6304S6305S6202S6201D6457D6458CN6601VR6491R6302R6304R6305R6303R6202R6209R6210R6399R6199J6108W6034W6075W6076

17.4. (D) Transformer P.C.B.ABCDEFG123456789DTRANSFORMER P.C.B (REPX0467B)998765432187654321W5909W5913W5955W5917W5930W5970W5994W5996W5997W5998W5918W59

17.5. (E) CD Detect P.C.B., (F) Spindle Position P.C.B., (G) CD LoadingP.C.B. & (K) Tuner Pack P.C.B.CD LOADING P.C.B (REP2578A-N)CD DETECT P.C.B(

17.6. (H) Power P.C.B.ABCDEFG123456789HGPOWER P.C.B (REPX0469G...GC) (REPX0469J...GN)BCEBCEBCEBCECBEBCEBCEBCEBCEBCE91818765432

7 AccessoriesRemote ControlFM AntennaAC Cord (For GN only)AC Cord (For GC only)AM Loop Antenna8SA-AK330GC / SA-AK330GN

GGHI J KL MBCEBCEBCEPbF1812345678910111217 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 11 +L2 +R3 -L4 -R1 -L2 -R4 +R3 +LR5805R5802W5871W5832W5816W5819W5868W5

17.7. (I) Deck P.C.B. & (J) Deck Mechanism P.C.B.ABCDEFG123456789DECK P.C.B.(REPX0331D)DECK MECHANISM P.C.B.(REPX0321A)JI13524IC100111C1006C1009C1

18 Wiring Connection DiagramCN5800JK5951JK5952LOW CH HIGH CHH5950/W59509. . . . . . . .1CN58011. . . . . . . .121. . . . . . . .12JK5950220-240V 50/60

19 Illustration of IC’s, Transistors and DiodesAN7348S-E1 (24P) LA1833NMNTLM (24P) LC72131MDTRM (20P) C1BB00000732 (32P) B0AACK000004MA2C16500EBCEB0BC

20.1. IC7002 (MN6627953HB) Servoprocessor/ Digital signalprocessor/ Digital filter/ D/AconverterPin No. Mark I/O Function1 EXT0 I/O Extend input/outpu

Pin No. Mark I/O Function13 D2+ O Motor driver (2) forward-actionoutput14 D3- O Motor driver (3) reverse-actionoutput15 D3+ O Crystal oscillating circ

Pin No. Mark I/O Function97 PHOTO_1 I Rotation Detection Signal(Deck 1)98 VREF - Reference for A-D (5V)99 AVcc - Analog Power Supply Input100 Demo I (

21 Troubleshooting Guide87SA-AK330GC / SA-AK330GN

Notes:22 Parts Location and Replacement Parts List · Important safety notice:Components identified bymark have special characteristics importan

22.1. Deck Mechanism (RAA4502-S)22.1.1. Deck Mechanism Parts Location89SA-AK330GC / SA-AK330GN

8 Operation Procedures9SA-AK330GC / SA-AK330GN

90SA-AK330GC / SA-AK330GN

22.1.2. Deck Mechanism Parts ListRef. No. Part No. Part Name & Description RemarksCASSETTE DECK101 RED0069 R/P HEAD BLOCK UNIT [M]102 RED0070 P/B

22.2. CD Loading Mechanism (RD-DAC026-S)22.2.1. CD Loading Mechanism Parts Location92SA-AK330GC / SA-AK330GN

93SA-AK330GC / SA-AK330GN

Ref. No. Part No. Part Name & Description RemarksTRAVERSE DECK301 RML0517 TIMING LEVER [M]302 RML0516 PLUNGER LEVER [M]303 RMB0551 UPPER SPINDLE S

22.3.1. Cabinet Parts Location22.3. Cabinet95SA-AK330GC / SA-AK330GN

96SA-AK330GC / SA-AK330GN

Ref. No. Part No. Part Name & Description RemarksCABINET AND CHASSIS1 L6FALEFH0030 FAN [M]2 REEX0202 10P FFC (PANEL) [M]3 REEX0211 14P FFC WIRE (D

Ref. No. Part No. Part Name & Description RemarksQ5953 B1AACF000064 TRANSISTOR [M]Q6411 B1ACKD000004 TRANSISTOR [M]Q6415 B1ACKD000004 TRANSISTOR [

Ref. No. Part No. Part Name & Description RemarksL2996 ERJ3GEY0R00V CHIP JUMPER [M]T5950 ETP76VST62HB POWER TRANSFORMER [M]T5951 RTP1H3E002 BACK U