ORDER NO. PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936 � � � � � � � � � �PIONEER ELECTRONIC CORPORATION 1998 c GR-408 RRV2059 1. SAFETY INFORMATION ...................................... 2 2. EXPLODED VIEWS AND PARTS LIST ................ 3 3. SCHEMATIC DIAGRAM ....................................... 6 4. PCB CONNECTION DIAGRAM ............................ 8 5. PCB PARTS LIST ............................................... 10 6. ADJUSTMENT .................................................... 10 7. GENERAL INFORMATION ................................ 11 7.1 IC .................................................................. 11 8. PANEL FACILITIES AND SPECIFICATIONS .... 13 CONTENTS T – IZK DEC. 1998 Printed in Japan THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). GRAPHIC EQUALIZER Type Model Power Requirement Remarks GR-408 KUCXCN AC120V www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 2 GR-408 1. SAFETY INFORMATION This service manual is intended for qualified service technicians ; it is not meant for the casual do-it- yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health & Safety Code Section 25249.6 – Proposition 65 NOTICE (FOR CANADIAN MODEL ONLY) Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must be of identical designation. REMARQUE (POUR MODÈLE CANADIEN SEULEMENT) Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces de remplacement doivent avoir la même désignation. ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. 2. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual. The use of a substitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER. 1. SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5mA. (FOR USA MODEL ONLY) Leakage current tester Reading should not be above 0.5mA Device under test Test all exposed metal surfaces Also test with plug reversed (Using AC adapter plug as required) Earth ground AC Leakage Test www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 3 GR-408 2.1 PACKING • PACKING PARTS LIST Mark No. Description Part No. 2. EXPLODED VIEWS AND PARTS LIST NOTES: • Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. • The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. • Screws adjacent to mark on the product are used for disassembly. 4 7 5 3 2 1 1 6 8 1 Pin Plug Cords (L = 1m) PDE1248 2 Polyform L 14904081-000 3 Polyform R 14904082-000 4 Polybag 20×26 15020026-510 5 Operating Instructions 15204080-0297 (English/French) 6 Carton Box 15304080-099 NSP 7 Warranty Card • • • • • NSP 8 Packing Sheet • • • • • www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 4 GR-408 9 18 18 18 18 18 18 10 12 11 1 5 4 6 6 6 6 7 2 2 19 18 18 18 18 18 18 18 18 18 18 18 18 18 13 18 3 3 19 18 18 20 20 18 19 19 3 3 17 6 8 14 6 6 6 13 13 13 18 18 15 16 2.2 EXTERIOR SECTION www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 5 GR-408 • EXTERIOR SECTION PARTS LIST Mark No. Description Part No. 1 Front Cabinet 10104080-001 2 EQ Bracket 12904082-010 3 EQ Knob(Black) 12704082-010 4 Power Button 12804080-010 5 EQ On/Off Button 12804080-110 6 Post 13004082-000 7 Rear Panel 18004085-101 NSP 8 Bottom Cabinet • • • • • 9 Bonnet Cover 18004083-010 10 Main Bord Assy (1/4) GR408-A (EQ PCB) 11 Main Bord Assy (2/4) GR408-A (POWER PCB) 12 Main Bord Assy (3/4) GR408-A (EQ ON/OFF PCB) 13 Foot(Black)W/O H/S 13821007-010 14 Main Bord Assy (4/4) GR408-A (JACK PCB) 15 AC Cord UL 02360040-006 NSP 16 Bushing • • • • • 17 Name Plate PAM1776 18 Screw BBZ30P080FZK 19 Screw IBZ30P080FMC 20 Screw BPZ26P080FMC www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com GR-408 6 A B C D 1 2 3 4 1 2 3 4 3. SCHEMATIC DIAGRAM A 3.1 MAIN BOARD ASSY AC CORD UL 02360040-006 IC1B LA6458S INPUT INPUT B IN BUF AM VR KNOB LED GRAPHIC EQUALIZER ON/OFF POWER SUPPLY POWER OFF/ON (LINE OUTPUT MUTE) OFF ON EQUALIZER OFF / ON -29 OUTPUT VC -12 +12 0 0 0 0 +29 A MAIN BOARD ASSY (GR408-A) 2/4 POWER PCB A 4/4 JACK PCB A 01804083-520 AC-2 AC-1 250V/630mA SW2 : EQUALIZER OFF/ON SW3 : POWER OFF/ON C51 0.22µ/500V R21 820/1W R22 820/1W R6 6.8k www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com GR-408 7 A B C D 5 6 7 8 5 6 7 8 Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST". A IC1B LA6458S IC1A LA6458S INPUT BUFFER AMP. OUTPUT (EQUALIZER OFF) GRAPHIC EQUALIZER GRAPHIC EQUALIZER INPUT BUFFER AMP. INPUT BUFFER AMP. GRAPHIC EQUALIZER INPUT GRAPHIC EQUALIZER INPUT GRAPHIC EQUALIZER INPUT EQUALIZER OFF / ON EQUALIZER OFF / ON OUTPUT GRAPHIC EQUALIZER OUTPUT VEE VCC GND VEE VCC VEE VCC VCC GND GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT VR1-VR14 : 01110203-230 GRAPHIC EQUALIZER OUTPUT 0 0 0 +12 0 0 0 +12 -12 +12 -12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 +12 -12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1/4 EQ PCB A 3/4 EQ ON/OFF PCB A R36 6.8k 6.8k VR8 C19 R6 6.8k R7 6.8k www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com GR-408 8 A B C D 1 2 3 4 1 2 3 4 4. PCB CONNECTION DIAGRAM A 4.1 MAIN BOARD ASSY 4/4 JACK PCB A 1/4 EQ PCB A 2/4 POWER PCB NEUTRAL WHITE LIVE A SIDE A NOTE FOR PCB DIAGRAMS : 1. Part numbers in PCB diagrams match those in the schematic diagrams. 2. The parts mounted on this PCB include all necessary parts for several destinations. For further information for respective destinations, be sure to check with the schematic diagram. 3. View point of PCB diagrams. Capacitor Connector P.C.Board Chip Part SIDE A SIDE B www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com GR-408 9 A B C D 5 6 7 8 5 6 7 8A B 3/4 EQ ON/OFF PCB A IC3 IC2 IC1 POWER CORD AC SIDE A MAIN BOARD ASSY A www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 10 GR-408 Mark No. Description Part No. Mark No. Description Part No. LIST OF ASSEMBLIES MAIN BOARD ASSY GR408-A NSP EQ PCB • • • • • NSP POWER PCB • • • • • NSP EQ ON/OFF PCB • • • • • NSP JACK PCB • • • • • MAIN BOARD ASSY SEMICONDUCTORS IC2,IC3 AUDIO IC M5229P IC1 IC LA6458SS 00206458-040 LED1 LED 01912000-110 SWITCHES SW SK-22F03G5 02012205-110 SW PBS-42H03-F18 02014218-110 RESISTOR VR1-VR14 SLIDE VR. 01110203-230 OTHERS T1 TRANSFORMER EI-35 01804083-520 Mark No. Description Part No. 5. PCB PARTS LIST NOTES: •Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. •The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. •When ordering resistors, first convert resistance values into code form as shown in the following examples. Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%). 560 Ω → 56 × 10 1 → 561 ........................................................ RD1/4PU 5 6 1 J 47k Ω → 47 × 10 3 → 473 ........................................................ RD1/4PU 4 7 3 J 0.5 Ω → R50 ..................................................................................... RN2H R 5 0 K 1 Ω → 1R0 ..................................................................................... RS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5.62k Ω → 562 × 10 1 → 5621 ...................................................... RN1/4PC 5 6 2 1 F A 6. ADJUSTMENT There is no information to be shown in this chapter. www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 11 GR-408 1 IN 1 NF 1 IN 2 NF 2 IN 3 NF 3 IN 4 NF 4 IN 5 NF 5 IN 1 NF 1 IN 2 NF 2 IN 3 NF 3 IN 4 NF 4 IN 5 NF 5 –Vcc –Vcc GND GND +Vcc +Vcc OUTPUT OUTPUT NON-INVERTING INPUT INVERTING INPUT INVERTING INPUT NON- INVERTING INPUT NF 7 NF 7 IN 7 IN 7 NF 6 NF 6 IN 6 IN 6 10k 10k 47k 560 47k 560 47k 560 47k 47k 560 560 560 47k 47k 47k 560 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 7. GENERAL INFORMATION • The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams. M5229P (MAIN BOARD ASSY : IC2, IC3) • Graphic Equalizer •Pin Arrangement 7.1 IC •Block Diagram •Pin Function . o N e m a N n i P n o it c n u F . o N e m a N n i P n o it c n u F 1 1 N I a g nitc e n n o c y b r e tlif s s a p d n a b e h t e s o p m o C sla ni m r e t F N d n a sla ni m r e t N I h ti w r o tic a p a c e b n a c nia g e h t d n a ,r e h t o h c a e o t tx e n d e t a c ol e dils ( r o tsis e r elb air a v a g nitc e n n o c y b p u t e s .) e m ulo v 1 1 6 N I a g nitc e n n o c y b r e tlif s s a p d n a b e h t e s o p m o C sla ni m r e t F N d n a sla ni m r e t N I h ti w r o tic a p a c e b n a c nia g e h t d n a ,r e h t o h c a e o t tx e n d e t a c ol e dils ( r o tsis e r elb air a v a g nitc e n n o c y b p u t e s .) e m ulo v 2 1 F N 2 1 6 F N 3 2 N I 3 1 7 N I 4 2 F N 4 1 7 F N 5 3 N I 5 1 g nitr e v ni- n o N t u p ni . p m a P O t u p t u o r o f nip t u p ni g nitr e v ni- n o N 6 3 F N 6 1 t u p ni g nitr e v n I . p m a P O t u p t u o r o f nip t u p ni g nitr e v n I 7 4 N I 7 1 T U P T U O . p m a P O t u p t u o r o f nip t u p t u O 8 4 F N 8 1 c c V + nip ylp p u s r e w o p e vitis o P 9 5 N I 9 1 D N G nip d n u o r G 0 1 5 F N 0 2 c c V – nip ylp p u s r e w o p e vit a g e N www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 12 GR-408 LA6458S (MAIN BOARD ASSY : IC1) • Input Buffer Amplifier •Pin Arrangement 1 Vcc VOUT1 VOUT1 VOUT2 VOUT2 VIN-1 VIN-1 VIN+1 VIN+1 VIN+2 VIN+2 VIN-2 VIN-2 VEE VEE Vcc Vcc 2 3 4 5 6 7 8 9 1,9 4 3 5 2 8 7 6 •Block Diagram www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 13 GR-408 8. PANEL FACILITIES AND SPECIFICATIONS • FRONT PANEL FACILITIES Equalizer ON indicator 1 2 3 1 POWER switch (POWER OFF / ON) When this switch is set to the ON position, power is supplied to the unit’s main circuits (Equalizer indicators lights). NOTE: Even when performing playback without using the functions of this component, be sure that its power switch is ON. If the power switch is OFF, no sound will be produced from the speakers. 2 EQUALIZER button (EQUALIZER OFF / ON) When this button is pressed, the equalizer ON indicator lights and its functions become operative. When pressed once again, this indicator go out and the unit’s functions are turned OFF, Use this button in the following manner: ON: When using the equalizer to add sound compen- sation while performing mixing operations with program sources (FM broadcasts, CD play, tape playback, etc.). OFF: When not using the equalizer, but playing back or recording program sources without compensation. 3 Equalizer controls These are equalizer controls for the bands 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4 kHz, 6 kHz and 15 kHz. When the equalizer button has been set to ON, these controls may be adjusted. When a control is raised upwards from the “0” position, the frequency band corresponding to that control will be emphasized; when the controls is lowered, the frequency band will be attenuated. These controls can be used independently for right and left channels. NOTE: In order to protect your speakers from damage resulting from excessively large inputs, whenever augmenting high- frequency sound over a wide range, be sure not to raise your amplifier’s sound volume too high. Left channel Equalizer indicators Right channel Equalizer indicators www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 14 GR-408 +0 –3 • SPECIFICATIONS Accessories Pin-plug cords : PDE1248 (L=1m) × 2 Input terminals (Reference input level/Input impedance) INPUT .......................................................... 150 mV/50 kΩ Gain............................................................................. -2 dB Output terminals (Reference output level/Output impedance) OUTPUT ..................................................... 150 mV/3.3 kΩ Harmonic distortion (20 Hz ~ 20 kHz, Output 1V) .................................................................................. 0.03 % Frequency response INPUT ................................................... 20Hz~20kHz dB Equalizer bands Center frequencies ................................................60 Hz, 150 Hz, 400 Hz,1 kHz 2.4 kHz, 6 kHz, 15 kHz Variable range .......................................................... ±10 dB SN ratio (IHF, A network, short circuit, 1V) INPUT ......................................................................106 dB Electrical section, miscellaneous Power requirements ................................... AC 120 V, 60 Hz Power consumption.........................................................6 W External dimensions (W x H x D) .......... 420 x 85 x 214 mm 16-9/16 x 3-3/8 x 8-7/16 in. Weight ................................................... 2.2 kg (4 lb. 14 oz.) Accessories Pin-plug cords .................................................................... 2 Operating Instructions ........................................................ 1 NOTE: Specifications and the design are subject to possible modifi- cations without notice, due to improvements. Red White Red White www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com