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C.E.SUPPLY Service Manual CASSETTE CAR STEREO WITH FM/AM ELECTRONIC TUNER ORDER NO. CRT2327 KEH-1906ZZ2 VEHICLE DESTINATION U.S.A, CANADA PRODUCED AFTER 1999 PART No. ID No. X1R/UC - This additional service manual is designed to be used together with Model KEH-1906ZZ/X1H/UC Service Manual CRT1721. Refer to it for finding parts numbers and adjustment,etc. which are not shown in this manual. PIONEER MODEL No. KEH-1906ZZ2/X1R/UC ELECTRICAL PARTS LIST(Page 11) Tuner Amp Unit Symbol and Description Q271 Transistor L502 Inductor R501 R545 WB Unit Symbol and Description C802,803 C813 Part No. KEH-1906ZZ/X1H/UC KEH-1906ZZ2/X1R/UC CCSQCH120J50 CCSQCH150J50 CCSQCH180J50 CCSQCH200J50 Part No. KEH-1906ZZ/X1H/UC KEH-1906ZZ2/X1R/UC 2SB1242 2SB1241 Not used LCTBR47K2125 RS1/10S101J RS1/10S271J RS1/8S0R0J Not used 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 C PIONEER ELECTRONIC CORPORATION 1999 K-ZZB. FEB. 1999 Printed in Japan 1 2 3 4 KEH-1906ZZ2 3. SCHEMATIC DIAGRAM 3.1 OVERALL CONNECTION DIAGRAM (GUIDE PAGE) A Note: When ordering service parts, be sure to refer to "EXPLODED VIEWS AND PARTS LIST" or "ELECTRICAL PARTS LIST". TUNER AMP UNIT A-a 2 1 A-a A-b Large size SCH diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 FM:-16dBs AM:-22dBs A-a A-b Guide page AM IF B A-a A-b Detailed page VCO AMP 3 2 1 LOOP FILTER WB:-11.0dBs 1 2 3 4 5 6 7 1 2 3 4 5 6 7 WB UNIT 9 8 7 6 5 4 3 2 1 C RF AMP 1ST IF 10.7MHz 1 3 5 7 9 11 13 15 17 19 DET. 2 4 6 8 10 12 14 16 18 20 2ND IF 450kHz TAPE +B REGULATOR EQ AMP 1 2 3 4 5 6 7 8 TAPE:-22.0dBs D P.C.BOARD (A) TEST TAPE: 315Hz 0dB -73dBs MECHA +B SW 2 A 1 2 3 4 MECHANISM MUTE 5 6 7 8 KEH-1906ZZ2 A-b TAPE:-28.4dBs FM:-20.4dBs AM:-26.4dBs WB:-19.4dBs A ELECTRONIC VOLUME 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 48 47 46 45 44 43 42 POWER AMP B 20 6 25 5 2 3 11 5 TAPE:-4dBs 12 4 TU +B SWITCH WB +B SWITCH FM +B SWITCH AM +B SWITCH 13 9 8 7 6 7 AUDIO +B REGULATOR 15 SYSTEM POWER 17 18 8 14 19 21 9 10 11 22 24 23 MUTE 16 10 4 MUTE 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 SYSTEM CONTORLLER 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 1 C SYSTEM +B SENSE VDD REGULATOR 12 2 3 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 ACC SENSE BACK UP SENSE MECHANISM MUTE ILLUMINATION POWER SWITCH D MECHANISM +B SWITCH A 5 6 7 8 3 B A D C 4 A-a A-b TUNER AMP UNIT KEH-1906ZZ2 A-a FM:-16dBs AM:-22dBs 1 1 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2