Table of Contents
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3 7 63 1515 0
Service
Manual
MULTI CD CONTROL FM/AM CASSETTE DECK
FH-M2017
VEHICLE
HILUX
TE
L 13942296513
- This service manual should be used together with the following manual(s):
Model No.
CX-1011
CX-977
- Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
CONTENTS
1. SAFETY INFORMATION ............................................3
2. EXPLODED VIEWS AND PARTS LIST .......................4
4. PCB CONNECTION DIAGRAM ................................26
5. ELECTRICAL PARTS LIST ........................................36
6. ADJUSTMENT..........................................................41
www
.
PIONEER CORPORATION
PIONEER ELECTRONICS (USA) INC.
PIONEER EUROPE NV
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2001
http://www.xiaoyu163.com
DESTINATION
PRODUCED AFTER
THAILAND
October 2001
Order No.
Mech. Module Remarks
CRT2406
3L
CRT2624
S9
x
ao
y
i
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
8
TOYOTA
TOYOTA PART No.
86120-YZB21
Q Q
3
6 7
1 3
Cassette Mech. Module:Mech.Description, Disassembly
CD Mech. Module:Circuit Description, Mech.Description, Disassembly
7. GENERAL INFORMATION .......................................55
7.1 DIAGNOSIS ........................................................55
7.1.1 DISASSEMBLY .........................................55
7.1.2
7.2 PARTS .................................................................60
7.2.1 IC................................................................60
7.2.2 DISPLAY ....................................................68
7.3 OPERATIONAL FLOW CHART ...........................69
u163
8. OPERATIONS AND SPECIFICATIONS.....................70
.
2 9
9 4
2 8
ZT
X1N/ES
ID No.
PIONEER MODEL No.
T2602
FH-M2017ZT/X1N/ES
1 5
0 5
8
2 9
9 4
CONNECTOR FUNCTION DESCRIPTION........
m
co
K-ZZU. SEPT. 2001 Printed in Japan
9 9
ORDER NO.
CRT2723
2 8
9 9
59
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Related Manuals for Pioneer FH-M2017ZT
Summary of Contents for Pioneer FH-M2017ZT
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Page 1: Table Of Contents
PIONEER ELECTRONICS (USA) INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936 C PIONEER CORPORATION 2001 K-ZZU. SEPT. 2001 Printed in Japan http://www.xiaoyu163.com... -
Page 2: Service
FH-M2017ZT 3 7 63 1515 0 - CD Player Service Precautions 1. For pickup unit(CXX1482) handling, please refer to"Disassembly"(see page 55). During replacement, handling precautions shall be taken to prevent an electrostatic discharge(protection by a jumper-solder). 2. During disassembly, be sure to turn the power off since an internal IC might be destroyed when a con- nector is plugged or unplugged. -
Page 3: Safety Information
FH-M2017ZT 3 7 63 1515 0 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. -
Page 4: Exploded Views And Parts List
FH-M2017ZT 3 7 63 1515 0 2. EXPLODED VIEWS AND PARTS LIST 2.1 EXTERIOR L 13942296513 u163 http://www.xiaoyu163.com... -
Page 5: Manual
FH-M2017ZT 3 7 63 1515 0 NOTE: - Parts marked by “*”are generally unavailable because they are not in our Master Spare Parts List. ∇ mark on the product are used for disassembly. - Screws adjacent to EXTERIOR SECTION PARTS LIST Mark No. - Page 6 FH-M2017ZT 3 7 63 1515 0 2.2 CD MECHANISM MODULE L 13942296513 u163 http://www.xiaoyu163.com...
- Page 7 FH-M2017ZT 3 7 63 1515 0 - CD MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Control Unit CWX2608 46 Gear CNV6320 2 Connector(CN701) CKS1959 47 Arm CNV6322 3 Connector(CN101) CKS3486...
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Page 8: Http://Www.xiaoyu163.Com
FH-M2017ZT 3 7 63 1515 0 2.3 CASSETTE MECHANISM MODULE L 13942296513 u163 http://www.xiaoyu163.com... -
Page 9: Fh-M2017Zt 9
FH-M2017ZT 3 7 63 1515 0 - CASSETTE MECHANISM MODULE SECTION PARTS LIST Mark No. Description Part No. Mark No. Description Part No. 1 Screw BSZ20P040FMC 31 Lever ENV1551 2 Washer CBF1037 32 Flywheel ENV1554 3 Washer CBG1003 33 Gathering PCB... -
Page 10: Block Diagram And Schematic Diagram
FH-M2017ZT 3 7 63 1515 0 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3.1 BLOCK DIAGRAM MAIN UNIT FM/AM TUNER UNIT FM/AM 1ST IF 10.7MHz MPXREF 41kHz ANT1 AMRF T51 Q51 CF51 CF52 CF53 AMDET AMANT L ch IC 2 FM MPX... -
Page 11: Manual
FH-M2017ZT 3 7 63 1515 0 CN402 RESET IC 551 S-80735ANDZI BUS+ DOUT IC 571 HA12187FP SYSTEM µ-COM BUS- DIN1 IC 501(1/2) PD5708A Q451 CDVD VDCONT Q452 PCE1 Q402 PCE2 bsen asen Q403 CN401 ELECTRONIC VOLUME/ POWER AMP SOURCE SELECTOR FL—... -
Page 12: Service
FH-M2017ZT 3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) 3 7 63 1515 0 Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”. Large size SCH diagram FM/AM TUNER UNIT TUNER: -30dBs... -
Page 13: Manual
FH-M2017ZT 3 7 63 1515 0 MAIN UNIT C316 R015 FM: 14.4dBs E-VOLUME PML003AM E-VOL input AVC-LAN: -3.8dBs CD,MD: -3.8dBs TAPE:-9.8dBs FM:-30.7dBs FM: -11.6dBs 600µH AVC-LAN: 8.2dBs BUS DRIVER > L 13942296513 D5708A NOTE : The > mark found on some component parts indicates Symbol indicates a resistor. -
Page 14: Manual
FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 15: Manual
FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 16: Manual
FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 17: Manual
FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 18: Manual
FH-M2017ZT 3 7 63 1515 0 3.3 KEYBOARD UNIT KEYBOARD UNIT 8.4V CN681 L 13942296513 CD EJECT TAPE EJECT u163 http://www.xiaoyu163.com... -
Page 19: Manual
FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 20: Service
FH-M2017ZT 3.4 CD MECHANISM MODULE 3 7 63 1515 0 PICKUP UNIT(SERVICE)(S9) RF AMP CN101 L 13942296513 ACT/MOTOR DRIVER SPINDLE M1 CXB6007 LOADING/CARRIAGE M2 CXB5903 u163 5V REGULATOR http://www.xiaoyu163.com... -
Page 21: Manual
FH-M2017ZT 3 7 63 1515 0 CONTROL UNIT SERVO CONTROL/DSP/DAC/LPF TC9495FP L 13942296513 16.934MHz CN651 SWITCHES: CONTROL UNIT S901 : HOME SWITCH..ON-OFF S902 : CLAMP SWITCH..ON-OFF S903 : DSCSNS SWITCH..ON-OFF S904 : 12EJ SWITCH..ON-OFF S905 : 8EJ SWITCH..ON-OFF The underlined indicates the switch position. -
Page 22: Manual
FH-M2017ZT Note:1. The encircled numbers denote measuring pointes in the circuit diagram. 3 7 63 1515 0 2. Reference voltage VREF:2.1V - Waveforms 5 CH1:FD 1 CH1:DSCSNS 5V/div. 1 CH1:DSCSNS 5V/div. 500mV/div. 6 CH2:FOK 2 CH2:CLCONT 2 CH2:CLCONT 5V/div. -
Page 23: Manual
FH-M2017ZT 3 7 63 1515 0 % CH1:RFO 5 CH1:FD % CH1:RFO 1V/div. 1V/div. 1V/div. 200ms/div. 0 CH2:TE ^ CH2:FOP 0 CH2:TE 500µs/div. 1V/div. 5ms/div. 2V/div. 500mV/div. ! CH3:TD ! CH3:TD 1V/div. 1V/div. With no disk inserted 32 Track Jump During "Focus Close"... -
Page 24: Manual
FH-M2017ZT 3 7 63 1515 0 3.5 CASSETTE MECHANISM MODULE DECK UNIT CN252 C256 Rev-L Rev-R MUTE NF1(R) 120/70 Vref1 IC251 ser/REP RIN(L) Fwd-R HA12228F RIN(R) MSOUT C405 R033 Fwd-L R404 270K MSDET FIN(R) C404 Vref2 Dolby-B R403 MAOUT... -
Page 25: Manual
FH-M2017ZT 3 7 63 1515 0 M1 MOTOR UNIT (MAIN MOTOR) EXA1491 CN255 CN256 REEL SENSE CN253 Q101 EGN1004 L102 R375 L101 R373 ESG1007 70µs S103 MECHANISM ESG1007 S102 MODE DRIVER load ESG1007 S101 LOAD SENSOR UNIT CN254 MOTOR UNIT... -
Page 26: Pcb Connection Diagram
FH-M2017ZT 3 7 63 1515 0 4. PCB CONNECTION DIAGRAM MAIN UNIT 4.1 MAIN UNIT NOTE FOR PCB DIAGRAMS 1. The parts mounted on this PCB ANTENNA include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic dia- gram. -
Page 27: Manual
FH-M2017ZT 3 7 63 1515 0 SIDE A CAR HARNESS CAR HARNESS L 13942296513 CN251 u163 FRONT CN901 http://www.xiaoyu163.com... -
Page 28: Manual
FH-M2017ZT 3 7 63 1515 0 MAIN UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 29: Manual
FH-M2017ZT 3 7 63 1515 0 SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 30: Manual
FH-M2017ZT 4.2 KEYBOARD UNIT 3 7 63 1515 0 SIDE A KEYBOARD UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 31: Manual
FH-M2017ZT 3 7 63 1515 0 KEYBOARD UNIT SIDE B L 13942296513 u163 http://www.xiaoyu163.com... -
Page 32: Manual
FH-M2017ZT 3 7 63 1515 0 4.3 CD MECHANISM MODULE CONTROL UNIT SIDE A L 13942296513 u163 http://www.xiaoyu163.com... -
Page 33: Manual
FH-M2017ZT 3 7 63 1515 0 SIDE B CONTROL UNIT L 13942296513 u163 http://www.xiaoyu163.com... -
Page 34: Manual
FH-M2017ZT 3 7 63 1515 0 4.4 DECK UNIT CN621 DECK UNIT SIDE A CN251 C271 L 13942296513 DECK UNIT SIDE B HEAD ASSY IC,Q VR302 CN254 CN255 CN253 IC351 CN252 IC251 Q351 Q352 VR301 CN256 u163 http://www.xiaoyu163.com... -
Page 35: Manual
FH-M2017ZT 3 7 63 1515 0 4.5 SENSOR UNIT SENSOR UNIT S101 LOAD S103 70µs S102 MODE L101 CN256 L102 Q101 REEL SENSE CN253 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 36: Electrical Parts List
FH-M2017ZT 3 7 63 1515 0 5. ELECTRICAL PARTS LIST NOTE: - Parts whose parts numbers are omitted are subject to being not supplied. - The part numbers shown below indicate chip components. Chip Resistor RS1/_S___J,RS1/__S___J Chip Capacitor (except for CQS..) CKS.., CCS.., CSZS.. -
Page 37: Manual
FH-M2017ZT 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- RD1/4PU221J RS1/16S102J RS1PMF680J RS1/16S102J RS1/16S104J RS1/16S102J RS1/16S104J RS1/16S102J RS1/16S104J RS1/16S182J RS1/16S104J RS1/16S472J RD1/4PU102J... -
Page 38: Manual
FH-M2017ZT 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CKSRYB103K50 RS1/16S472J CKSRYB102K50 RS1/16S102J CKSRYB103K50 RS1/16S102J CEJQ100M16 RS1/16S102J CKSRYB473K25 RS1/16S0R0J CKSRYB102K50 RS1/16S473J CKSRYB103K50... -
Page 39: Manual
FH-M2017ZT 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- Switch CSG1120 RS1/16S823J Switch CSG1120 RS1/16S823J Switch CSG1120 RS1/16S823J Switch CSG1120 RS1/16S124J Switch... -
Page 40: Service
FH-M2017ZT 3 7 63 1515 0 =====Circuit Symbol and No.===Part Name Part No. =====Circuit Symbol and No.===Part Name Part No. ------ ------------------------------------------ ------------------------- ------ ------------------------------------------ ------------------------- CKSRYB103K50 CAPACITORS CKSRYB104K16 CKSRYB104K16 CKSRYB391K50 CKSRYB333K16 CKSRYB391K50 CKSRYB104K16 CKSRYB391K50 CKSRYB391K50 CKSRYB473K16 CKSRYB103K50 CKSRYB473K16... -
Page 41: Adjustment
FH-M2017ZT 3 7 63 1515 0 6 ADJUSTMENT 6.1 TEST MODE 1+6+[DISC]three times Diagnosis IN Segment all on OPERATION DISPLAY TOYOTA DIAGNOSIS S9 MECHANISM TEST MODE TUNE UP(") [DISC]+TUNE UP(") S9 MECHA. TEST MODE IN TOYOTA DIAGNOSIS IN P190... -
Page 42: Manual
FH-M2017ZT 3 7 63 1515 0 6.2 CD ADJUSTMENT 1) Precautions 2) Test Mode • This unit uses a single power supply (+5V) for the reg- This mode is used for adjusting the CD mechanism ulator. The signal reference potential, therefore, is module of the device. -
Page 43: Manual
FH-M2017ZT 3 7 63 1515 0 - Flow Chart [DISC] [KEY] Source On Contents Display RF AMP Power On Power On New Test Mode Gain switching (T. offset is adjusted) (T. offset is not adjusted) [TUNE UP] [TUNE DOWN]... -
Page 44: Manual
FH-M2017ZT 3 7 63 1515 0 6.3 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT • Note : The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mecha- nism module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU unit for the CD mechanism module. -
Page 45: Manual
FH-M2017ZT 3 7 63 1515 0 Ech → Xch 20mV/div, AC Grating waveform Fch → Ych 20mV/div, AC 0° 30° 45° 60° L 13942296513 75° 90° u163 http://www.xiaoyu163.com... -
Page 46: Manual
FH-M2017ZT 3 7 63 1515 0 6.4 CASSETTE SECTION - Connection Diagram Extention Cord GGD1121 DECK UNIT VR302 VR301 Pin2 Pin3 CN251 L-CH R-CH Meter(2) L 13942296513 DOLBY B NR ADJUSTMENT Test Tape Adjustment Point Adjustment Method (Switch Position) -
Page 47: Manual
FH-M2017ZT 3 7 63 1515 0 6.5 ERROR CODE - Error Messages If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of the error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from the users and also for facilitating trouble analysis and repair work in servicing. -
Page 48: Manual
FH-M2017ZT 3 7 63 1515 0 - New Test Mode S-CD plays the same way as before. If an error such as off focus, spindle unlocking, unreadable sub-code, or sound skipping occurs after setup, its cause and time occurred (in absolute time) are displayed. -
Page 49: Manual
FH-M2017ZT 3 7 63 1515 0 (4) Display of Operational Status during Setup Status No. Contents Protective action Focus search start Focus search timeout. Focus search 2 Focus search timeout. Focus search 3 Focus search timeout. Focus search 4 Focus search timeout. -
Page 50: Manual
FH-M2017ZT 3 7 63 1515 0 (5) Display Examples 1) During Setup TNO. Min Sec 11 11' 11" 2) During Operation (TOC read, TRK search, Play, FF and REV) The same as in the normal mode. 3) When a Protection Error Occurred (A) Error display ((A)←→(B), (C) : 4 key) - Page 51 FH-M2017ZT 3 7 63 1515 0 6.6 AVC-LAN DIAGNOSIS MODE L 13942296513 u163 http://www.xiaoyu163.com...
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FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
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FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
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FH-M2017ZT 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 55: General Information
FH-M2017ZT 3 7 63 1515 0 7. GENERAL INFORMATION 7.1 DIAGNOSIS 7.1.1 DISASSEMBLY - Removing the Case (not shown) 1. Remove the Case. - Removing the Grille Assy (Fig.1) CD Mechanism Module Remove the four crows and the Grille Assy. -
Page 56: Manual
FH-M2017ZT 3 7 63 1515 0 - Removing the Chassis (Fig.3) Remove the two screws and remove the Chassis. Chassis Fig.3 L 13942296513 - Removing the Cassette Mechanism Module (not shown) Remove the four screws and then remove the Cassette Mechanism Module. -
Page 57: Manual
FH-M2017ZT 3 7 63 1515 0 - How to hold the Mechanical Unit 1. Hold the top and bottom frame. 2. Do not squeeze top frame's front portion too tight, because it is fragile. Do not squeeze. - How to remove the Top and Bottom Frame 1. -
Page 58: Manual
FH-M2017ZT 3 7 63 1515 0 - How to remove the Control Unit 1. Give jumper-solder treatment to the Flexible Wire of Jumper-Solder the Pickup unit, then remove the wire from the Connector. Control Unit 2. Remove all 4 points of solder-treatment on the Lead Wire. -
Page 59: Connector Function Description
FH-M2017ZT 3 7 63 1515 0 7.1.2 CONNECTOR FUNCTION DESCRIPTION CDL CDR SGND MUTE L 13942296513 ANTENNA +B ACC CDL CDR u163 http://www.xiaoyu163.com... -
Page 60: Parts
FH-M2017ZT 3 7 63 1515 0 7.2 PARTS 7.2.1 IC - Pin Functions (PD5708A) Pin No. Pin Name Function and Operation PLL data output PLL data clock Not used LCE1 LCD driver chip enable output LCD driver data output... -
Page 61: Manual
FH-M2017ZT 3 7 63 1515 0 Pin No. Pin Name Function and Operation Forward/Reverse select output PLAY MS gain select output Metal input 69-72 XPIO3-0 CD LSI data input output Not used cdej CDS eject sense input csej Tape eject sense input... -
Page 62: Manual
FH-M2017ZT 3 7 63 1515 0 - Pin Functions (LC75853NE) Pin No. Pin Name Function and Operation S1/P1-S4/P4 Segment output 5-40 S5-S40 Segment output 41-43 COM1-3 Common output KS1/S41 Key scan output KS2/S42 Key scan output 46-49 KS3-KS6 Key scan output... -
Page 63: Manual
FH-M2017ZT 3 7 63 1515 0 - Pin Functions(TA2153FN) Pin No. Pin Name Function and Operation Power supply voltage terminal RFGC RF amplitude adjustment control signal terminal GMAD AGC amplifier frequency characteristic adjustment terminal Main beam amplifier input terminal... -
Page 64: Manual
FH-M2017ZT 3 7 63 1515 0 - Pin Functions(TC9495FP) Pin No. Pin Name Function and Operation TESTO Test mode terminal Replay speed flag output terminal uhso Replay speed flag output terminal EMPH Emphasis flag output terminal for sub code Q data LRCK Channel clock (44.1 kHz) output terminal... -
Page 65: Manual
FH-M2017ZT 3 7 63 1515 0 Pin No. Pin Name Function and Operation 58-61 FLGA-D External flag output terminal for internal signal monitor Digital + power supply terminal (5 V) Digital ground terminal RF amplifier gain switching terminal Not used... -
Page 66: Manual
FH-M2017ZT 3 7 63 1515 0 - Pin Functions(BA5996FM) Pin No. Pin Name Function and Operation Input pin for reference voltage OPIN2(+) Input pin for non-inverting input for CH2 preamplifier OPIN2(-) Input pin for inverting input for CH2 preamplifier... -
Page 67: Manual
FH-M2017ZT 3 7 63 1515 0 - FM/AM Tuner Unit FM/AM 1ST IF 10.7MHz MPXREF 41kHz AMRF T51 Q51 CF51 CF52 CF53 AMDET AMANT L ch IC 2 FM MPX R ch AMIN ANT ADJ COMP MIXER, IF AMP, DET. -
Page 68: Display
FH-M2017ZT 3 7 63 1515 0 7.2.2 DISPLAY - CAW1684 L 13942296513 u163 http://www.xiaoyu163.com... -
Page 69: Operational Flow Chart
FH-M2017ZT 3 7 63 1515 0 7.3 OPERATIONAL FLOW CHART Power ON VCC=5V 62pin VCC=5V 16pin bsen 19pin asen L 13942296513 20pin swvdd←L 54pin IPPW←H 22pin Source keys operative Source ON SYSPOW←L 41pin u163 (After that, proceed to each source operation.) -
Page 70: Operations And Specifications
FH-M2017ZT 3 7 63 1515 0 8. OPERATIONS AND SPECIFICATIONS 8.1 OPERATIONS - RADIO AM/FM select button Power Scan Traffic information Preset button Tuning button L 13942296513 - TAPE Power Tape eject button Cassette loading slot Tape button Skip... -
Page 71: Manual
FH-M2017ZT 3 7 63 1515 0 - CD CD button CD loading slot CD eject button Power Scan Random Track button Repeat L 13942296513 8.2 SPECIFICATIONS Power source..........13.2V(10.5–16.0V) FM tuner Backup current ..........1mA or less Frequency............87.5–108 MHz Grounding system........Negative type Usable selectivity............4dBµV...