Yamaha RX-V795a Service Manual
Yamaha RX-V795a Service Manual

Yamaha RX-V795a Service Manual

Yamaha av receiver service manual
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RX-V795a / RDS
CONTENTS
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1 0 0 6 9 1
HTR-5170
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are
already known and understood by the users, and have therefore not been restated.
WARNING:
Failure to follow appropriate service and safety procedures when servicing this product may result in
personal injury, destruction of expensive components, and failure of the product to perform as specified.
For these reasons, we advise all YAMAHA product owners that any service required should be performed
by an authorized YAMAHA Retailer or the appointed service representative.
IMPORTANT:
The presentation or sale of this manual to any individual or firm does not constitute authorization, certifica-
tion or recognition of any applicable technical capabilities, or establish a principle-agent relationship
of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and
service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,
inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to
exist, please contact the distributor's Service Division.
WARNING:
Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this
buss).
IMPORTANT:
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the
unit.
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AV RECEIVER
SERVICE MANUAL

IMPORTANT NOTICE

DISPLAY DATA
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YAMAHA CORPORATION
P.O.Box1,Hamamatsu,Japan
Printed in Japan

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Summary of Contents for Yamaha RX-V795a

  • Page 1: Important Notice

    This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated.
  • Page 2: To Service Personnel

    RX-V795a/RDS/HTR-5170 TO SERVICE PERSONNEL 1. Critical Components information. Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Model only). When service has been completed, it is imperative that you verify that all exposed conductive surfaces are properly insu- lated from supply circuits.
  • Page 3: Front Panels

    RX-V795a/RDS/HTR-5170 FRONT PANELS RX-V795a D I G I T A L CINEMA DSP DOLBY NATURAL SOUND AV RECEIVER RX-V795a D I G I T A L SURROUND VOLUME INPUT SELECTOR STANDBY/ON TAPE/MD MON /EXT. DECODER ∞ TUNING A/B/C/D/E MEMORY EDIT...
  • Page 4: Rear Panels

    " DTS DIGITAL SURROUND ", ARE TRADEMARKS OF DIGITAL THEATER SYSTEMS, AUDIO SIGNAL COPYRIGHT 1992 DOLBY LABORATORIES, INC. ALL RIGHTS RESERVED. INC. COPYRIGHT 1996 DIGITAL THEATER SYSTEMS,INC. ALL RIGHTS RESERVED. RX-V795a/HTR-5170 R, T models REAR CENTER (SURROUND) EXTERNAL DECOODER INPUT...
  • Page 5 ARE TRADEMARKS OF DOLBY LABORATORIES LICENSING CORPORATION. " DTS DIGITAL SURROUND ", ARE TRADEMARKS OF DIGITAL THEATER SYSTEMS, AUDIO SIGNAL COPYRIGHT 1992 DOLBY LABORATORIES, INC. ALL RIGHTS RESERVED. INC. COPYRIGHT 1996 DIGITAL THEATER SYSTEMS,INC. ALL RIGHTS RESERVED. RX-V795a L model REAR CENTER (SURROUND) EXTERNAL DECODER INPUT...
  • Page 6: Specifications

    RX-V795a/RDS/HTR-5170 SPECIFICATIONS Turnover Frequency ........ 3.5kHz AUDIO SECTION Filter Characteristics MAIN, REAR SP SMALL : H.P.F..fc = 90Hz, 12dB/oct. Minimum RMS Output Power per Channel SUB WOOFER : L.P.F......fc = 90Hz, 18dB/oct. RX-V795a Bass Extension (MAIN L/R) ......... +6dB (50Hz) MAIN, 20Hz to 20kHz, 0.04% THD, 8Ω...
  • Page 7 RX-V795a/RDS/HTR-5170 DIMENSIONS VIDEO SECTION Video Signal Type U, C models ..............NTSC A, B, G, L models ............PAL R, T models ............NTSC/PAL Video Signal Level ..........1Vp-p/75Ω S-Video Signal Level Y ................1Vp-p/75Ω C ..............0.286Vp-p/75Ω Maximum Input Level ........1.5Vp-p or more Signal-to-Noise Ratio ........
  • Page 8: Internal View

    RX-V795a/RDS/HTR-5170 INTERNAL VIEW w e r u i o q P. C. B. INPUT (3) w P. C. B. MAIN (6) e P. C. B. INPUT (4) (R, T models) r P. C. B. MAIN (5) t P. C. B. VIDEO (2) y P.
  • Page 9: Self Diagnosis Function

    SELF DIAGNOSIS FUNCTION 1. PURPOSE AND OPERATION The RX-V795a/RDS/HTR-5170 has a Self Diagnosis Function to locate a faulty part, if any, by inspecting and taking measurements. There are 11 main items in the diagnostic menu and some of them have sub-menu items as listed below.
  • Page 10 RX-V795a/RDS/HTR-5170 2. BEGINNING AND CANCELLATION (1) STARTING UP THE FUNCTION AND THE DISPLAY There are two ways to start up. One is by using the front panel keys, another is by using the remote control transmitter. After starting up, the menu No. 1 is displayed.
  • Page 11 RX-V795a/RDS/HTR-5170 FL display at start-up of diagnostic program When the diagnostic program has started, the history (*2) of the protection function (*1) is displayed. If the protection function has been activated in the past, the type and voltage value are displayed. After a few seconds the diagnosis function menu will appear.
  • Page 12 RX-V795a/RDS/HTR-5170 3. OPERATION AND DISPLAY WHEN STARTING DIAGNOSIS FUNCTION (1) Selection of diagnostic menu The diagnostic menu and the sub-menu can be selected by using the front panel keys of the main unit or the remote control unit. Selection by using the front panel keys The main menu can be changed cyclically by using the "TUNING UP/DOWN"...
  • Page 13 RX-V795a/RDS/HTR-5170 4. CONTENTS OF DIAGNOSIS FUNCTION This section describes the contents of the self diagnosis function in detail. (1) ANALOG THROUGH The input is fixed to analog (A/D). There are two submenus. 1. MAIN BYPASS The MAIN L/R signals bypass the analog circuits to be output.
  • Page 14 RX-V795a/RDS/HTR-5170 (2) DSP THROUGH The input is automatically discriminated by signal detection and switched with priorities AC3>DTS>PCM AUDIO>analog. There are the following three submenus. 2. YSS918-SRAM MAIN L/R are input to the DSP via AC3D2av, pass through SRAM, and are then output to all channels without being processed.
  • Page 15 RX-V795a/RDS/HTR-5170 (3) AC3/DTS THROUGH The input is digital signal only. Dolby Digital (AC-3) or DTS decoding operation is executed, according to the input source. 3. ST:10001001 AC3 decoded signals are output to each channel via AC3D2av. CODEC.AD AC3D2av(YSS918) MAIN L...
  • Page 16 RX-V795a/RDS/HTR-5170 (5) SPEAKERS SET The input is automatically discriminated by AC3>DTS>PCM>analog. The L/R signals are output to the channels specified by the submenu without being processed (through). There are the following 9 submenu items: The signal from the DSP block is normally in the effect off status for menu items 1-4.
  • Page 17 RX-V795a/RDS/HTR-5170 (6) DISPLAY CHECK Check program for FL display. The display status will change as follows with submenu operation. The signal is processed with EFFECT OFF. For switching between internal and external sync commanded by the microprocessor, the forced external sync is selected.
  • Page 18 RX-V795a/RDS/HTR-5170 (9) AD DATA CHECK The A/D conversion values of the main CPU which detects key scan, protection, etc. are displayed in % (100%: 5V). All signal processing before this menu is executed will be held. The keys on the main unit cannot be operated to detect the values of all keys in the K0/K1 and K2/RE pages. Turning the rotary encoder (input selector on the main unit) will switch the submenu.
  • Page 19 RX-V795a/RDS/HTR-5170 (10) STATUS FROM DSP MICOM The status data from the DSP microprocessor is sequentially displayed in a hexadecimal number. All signal processing before this menu is executed will be held. 10.CPU/1 02 10 10.CPU/2 6A 00 10.CHS/1 00 01 10.CHS/2 00 00...
  • Page 20 RX-V795a/RDS/HTR-5170 (11) CPU VERSION/CHECK SUM/PORT INFO/EXIT DIAG The check sum, version and port setting of main CPU/DSP CPU are displayed. The signal is EFFECT OFF. Operating the submenu will finish self-diagnosis, and ordinary operation mode will be restored. The suffix letter ("A" in the following) of version indication is for compatibility of communications between the main and DSP microprocessors.
  • Page 21: Factory Preset

    RX-V795a/RDS/HTR-5170 FACTORY PRESET All of the system settings are initially set from the factory as follows. INPUT (VIDEO) DVD/LD (DVD/LD) EFFECT LEVEL EFFECT CHANNEL PRESET VALUE CENTER RIGHT SURROUND LEFT SURROUND SUB WOOFER DSP PROGRAM INPUT DSP RROGRAM PHONO CONCERT HALL...
  • Page 22: Amp Adjustments

    RX-V795a/RDS/HTR-5170 AMP ADJUSTMENTS Confirmation of Idling Current 1) No signal applied. 2) Non-loaded condition. 3) Aging is not neccessary. Note Item Rating (DC) Test Point MAIN L CB529 Cut OFF If the measured voltage exceeds1.6mV, cut the R557 (L ch)
  • Page 23: Tuner Adjustments

    RX-V795a/RDS/HTR-5170 TUNER ADJUSTMENTS Measuring Instruments Dummy antenna FM signal generator (FM SG) FM dummy antenna Stereo signal generator (SSG) 10Ω 45Ω AM signal generator (AM SG) Distortion meter (DIST. M) RECEIVER FM SG (75Ω) (50Ω) AC voltmeter (ACVM) DC voltmeter (DCVM)
  • Page 24 RX-V795a/RDS/HTR-5170 FM Adjustment Before Adjustment 1) For dB, 1µV=0dBµ 3) Install the Matching Transformer and connect FM SG. Example : 60dBµ=1mV 4) Set each switch to the following position unless other- 2) 100% modulation means that the frequency deviation is wise specified.
  • Page 25 RX-V795a/RDS/HTR-5170 See page 22 for TP locations & adjustment points. Reception Adjusted Rating Step Adjustment item Signal (ANT IN) Test point frequency point Adjustment of 98.1MHz Adjust so that the DC voltage FM ANT (75Ω) Front end IFT Pin 16 of IC1...
  • Page 26 RX-V795a/RDS/HTR-5170 AM Adjustment (This should be done after FM adjustment.) Connection Diagram (Measuring instruments) 1) Adjustment of sensitivity AM loop antenna AM ANT ACVM TUNER AM SG Dummy P. C. B. Antenna DIST. M Oscilloscope See page 22 for TP locations & adjustment points.
  • Page 27 RX-V795a/RDS/HTR-5170 DISPLAY DATA (V2573800) V101 : 16-BT-60GK PATTERN AREA PIN CONNECTION Pin No. Connection Pin No. Connection Pin No. Connection Pin No. Connection Pin No. Connection Note 1) F1, F2 ..Filament 3) NC ..... No Connection 5) 1G~16G ..Grid 2) NP ....
  • Page 28: Ic Data

    RX-V795a/RDS/HTR-5170 IC DATA IC3 : YM3436DK DIR ( Digital Format Interface Receiver ) 24 26 28 25 17 15 14 13 12 31 DAUX EXTW HDLT SYSTEM CLOCK DOUT TIMING TSTN SYNC GENERATOR D DIN SYNC CTLP DATA CLOCK EIAJ (AES/EBU) CONTROLLER (N.C.)
  • Page 29 RX-V795a/RDS/HTR-5170 IC4 : YSS918-F Digital Pro-Logic Decoder...
  • Page 30 RX-V795a/RDS/HTR-5170 IC4 : YSS918-F Digital Pro-Logic Decoder Name Function VDD1 +5V terminal (for terminal section) RAMCEN Chip enable terminal for external SRAM RAMA16 Address terminal 16 for external SRAM RAMA15 Address terminal 15 for external SRAM SDIB0 PCM input terminal 0 to Sub DSP...
  • Page 31 RX-V795a/RDS/HTR-5170 IC4 : YSS918-F Digital Pro-Logic Decoder Name Function NONPCM non-PCM data detect terminal AC-3 CRC error detect terminal MUTE Auto mute detect terminal KARAOKE AC-3 karaoke data detect terminal SURENC AC-3 2/0 mode dolby surround encode input detect terninal...
  • Page 32 RX-V795a/RDS/HTR-5170 IC14 : LC87F5164A µ -Com...
  • Page 33 RX-V795a/RDS/HTR-5170 IC14 : LC87F5164A µ -Com Name Function Name Function Parallel interface output WR SI2P2/SCK2 PA3/WR SI02 clock input/output PA4/RD Parallel interface output RD SI2P3/SCK20 SI02 clock output Parallel interface output RS PWM1 PA5/RS PWM1 output port INT0 input/HOLD release input/...
  • Page 34 RX-V795a/RDS/HTR-5170 IC406 : LC74781-9626 Superimpose VSS1 VDD1 XTAL IN XTAL OUT CTRL3 CTRL1 CTRL2 BLANK SEP IN OSC IN SEP OUT OSC OUT SEPC CHARA SYN IN VDD1 SCLK CV IN VDD2 CV OUT SERIAL 8 BIT LATCH COMMAND PARALLEL...
  • Page 35 RX-V795a/RDS/HTR-5170 IC406 : LC74781-9626 Superimpose Pin No. Symbol Terminal name Function Ground terminal Connection to GND (Digital system ground terminal) VSS1 Crystal oscillation Terminal to connect the crystal of the crystal oscillator for internal synchronous XTAL IN terminal signal generation and a capacitor or to input an external clock. (2fsc or 4fsc)
  • Page 36 RX-V795a/RDS/HTR-5170 IC102 : LC75712E Display Driver Name Function Name Function AM33 AM34 AM35 Anode outputs Pull-down resistors are built in. AA4/G16 AA5/G15 Anode/grid outputs AA6/G14 Pull-down resistors are built in. AM10 AA7/G13 AM11 AA8/G12 AM12 AM13 AM14 AM15 Anode outputs AM16 Pull-down resistors are built in.
  • Page 37 RX-V795a/RDS/HTR-5170 IC21 : HD6433397A97F Main Micro Processor 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 XTAL EXTAL STBY or Fvpp P52/SCK0 P51/RXD0 P50/TXD0 P96/ P47/PW1 P46/PW0 P92/IRQ0 P91/IRQ1...
  • Page 38 RX-V795a/RDS/HTR-5170 IC21 : HD6433397A97F Main Micro Processor Name Function I/O Detail of Function Name Function I/O Detail of Function 1 /RES /RES CPU Reset 41 P42 O Volume Down 2 XTAL XTAL 8MHz 42 P43 Input Selector A 3 EXTAL...
  • Page 39: Pin Connection Diagram

    RX-V795a/RDS/HTR-5170/DSP-R795a PIN CONNECTION DIAGRAM µPC29M33T-E1 µPC4570HA NJM78L05A NJM7812FA NJM79M12FA NJM2068L-D NJM7805FA 1:INPUT 2:GND 3:OUTPUT LA7956 LB1641 HD74HC00P HD74HC153P LA3401 LA1266 TC74HCU04AP TC4053BP LC72131 LC74781-9626 µPD4066BC TC9299P LC72720N LC78211 NJM2904M-T1 HD74HC02FPEL AK4320-VM M5M51288BKJ-20L µPC4570G2 LC78212 LC78213 NJM2068MD M5220FP AK4526 LC75710NE HD6433397A97F...
  • Page 40: Block Diagram

    RX-V795a/RDS/HTR-5170/DSP-R795a RX-V795a/RDS/HTR-5170/DSP-R795a BLOCK DIAGRAM E-63/J-53...
  • Page 41 RX-V795a/RDS/HTR-5170/DSP-R795a BLOCK DIAGRAM IC351 MAIN TONE BYPASS SW201 COAX DVD/LD PHONES MAIN POWER AMP IC19 IC19 VR251 INPUT IC352 LEVEL Q507,511,514,515, 7 11 13 37 SELECTOR IC202 SELECTOR IC10A IC16A IC251A 522A/C,523A/C MAIN IC18 IC353 H,P,F Q540 Q502 RY501 DVD/LD...
  • Page 42 RX-V795a/RDS/HTR-5170/DSP-R795a SCHEMATIC DIAGRAM (DSP) IC1 : NJM2904M IC2 : HD74HC02FPEL µ IC8~11, 13 : PC4570G2 Quad 2 Input NOR Dual OP Amp P-E69/J59 IC5 : M5M51288BKJ-20L DIGITAL IN Vcc(5V) MEMORY ARRAY GND(0V) 131072X8bit 512X2048 2048 COLUMN I/O CIRCUIT 11.5 MAIN L...
  • Page 43 RX-V795a/RDS/HTR-5170/DSP-R795a P-E65/J55 P-E69/J59 P-E69/J59 P-E71/J61 SCHEMATIC DIAGRAM (INPUT) Point V : 2V/div (CH1) CH1 : Pin1 of IC21 Point (Pin3 of IC21) CH2 : Pin29 of IC21 V : 2V/div (CH2) V : 2V/div H : 50 nsec/div H : 0.5 sec/div...
  • Page 44 RX-V795a/RDS/HTR-5170/DSP-R795a CIRCUIT CHANGES BY MARKET. SCHEMATIC DIAGRAM (INPUT & VIDEO) IC401 : TC4053BP IC402~404, 407, 408 : LA7956 Triple 2-Channel Analog Multiplexers/ Video Switch Demultiplexers X-COMMON OUT C IN OUT C IN OUT C IN OUT C IN IC11 : NJM2068MD OUT C IN µ...
  • Page 45 RX-V795a/RDS/HTR-5170/DSP-R795a SCHEMATIC DIAGRAM (OPERATION) P-E67/J57 P-E70/J60 P-E66/J56 -28.1 -28.1 -22.5 -27.8 -27.8 -29.6 CIRCUIT CHANGES BY MARKET. -28.9 -23.6 -28.8 -27.8 -27.8 -28.0 -27.9 : NOT USED -27.9 -27.9 FULL MUTE DRIVE -11.4 -27.9 DISPLAY DRIVE -27.9 -27.9 RESET -27.9...
  • Page 46 RX-V795a/RDS/HTR-5170/DSP-R795a IC351 : TC74HCU04AP Hex Inverters SCHEMATIC DIAGRAM (OPERATION) DIGITAL SELECTOR IC352 : HD74HC00P Quadruple 2-input Positive NAND Gates DIGITAL IN SPEAKER SETTING CONTROL 11.3 IC353 : HD74HC153P Dual 4 to 1 Data Selectors MAIN CENTER -11.3 11.3 11.3 11.5 -11.3...
  • Page 47 RX-V795a/RDS/HTR-5170/DSP-R795a SCHEMATIC DIAGRAM (MAIN) Each voltage given here represents that in the top side of IMPEDANCE SELECTOR, but the one in the parentheses ( ) is that in the bottom side. 13.6 48.8 (40.5) 48.8 48.6 (40.5) MAIN L 48.8 POWER AMP (40.5)
  • Page 48 RX-V795a/RDS/HTR-5170/DSP-R795a SCHEMATIC DIAGRAM (MAIN) Each voltage given here represents that in the top side of IMPEDANCE SELECTOR, but the one in the parentheses ( ) is that in the bottom side. REAR L 48.8 (40.5) POWER AMP P-E67/J57 48.8 (40.5) 48.4...
  • Page 49 RX-V795a/HTR-5170/DSP-R795a Each voltage given here represents that in the FM (98. 1MHz, STEREO) reception mode SCHEMATIC DIAGRAM (TUNER) but the one in the parentheses ( ) is that in the AM (1080kHz, MAN’L) reception mode. IC1 : LA1266 CIRCUIT CHANGES BY MARKET.
  • Page 50 RX-V795aRDS Each voltage given here represents that in the FM (98. 1MHz, STEREO) reception mode SCHEMATIC DIAGRAM (TUNER) but the one in the parentheses ( ) is that in the AM (1080kHz, MAN’L) reception mode. IC1 : LA1266 AM/FM IF IC2 : LC72131 PLL Controller DISCRIMINATOR BALANCE ADJ.
  • Page 51: Parts List

    WARNING PARTS LIST Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. ELECTRICAL PARTS Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS List. For the part Nos. of the carbon resistors refer to page 94. Chip resistors are listed on page 87.
  • Page 52 RX-V795a/RDS/HTR-5170 P.C.B. DSP Schm Schm Description Description PART NO. PART NO. Ref. Ref. V3005800 P.C.B. UR818330 C.EL 330uF 6.3V VQ044200 CN.BS.PIN UB245100 C.CE.M.CHP 0.1uF VQ044500 CN.BS.PIN UR818330 C.EL 330uF 6.3V VQ044600 CN.BS.PIN UB245100 C.CE.M.CHP 0.1uF UB245100 C.CE.M.CHP 0.1uF UB245100 C.CE.M.CHP 0.1uF UB052100 C.CE.M.CHP 100pF...
  • Page 53 RX-V795a/RDS/HTR-5170 P.C.B. DSP & VIDEO Schm Schm Description Description PART NO. PART NO. Ref. Ref. C122 UA952100 C.MYLAR 100pF IC14 XV260E00 IC LC875164A-5K20 CPU C123 UR837220 C.EL 22uF IC15 XU965A00 IC uPC29M33T-E1 3.3V C124 UR847100 C.EL 10uF VV655300 TR.DGT DTA144EKA C125 UR837220 C.EL...
  • Page 54 RX-V795a/RDS/HTR-5170 P.C.B. VIDEO Schm Schm Description Description PART NO. PART NO. Ref. Ref. C416 UR829100 C.EL 1000uF D404 VD631600 DIODE 1SS133,176,HSS104 C417 UR837330 C.EL 33uF D405 VD631600 DIODE 1SS133,176,HSS104 C418 UR829100 C.EL 1000uF D406 VD631600 DIODE 1SS133,176,HSS104 C419 UR837100 C.EL...
  • Page 55 RX-V795a/RDS/HTR-5170 P.C.B. VIDEO & OPERATION Schm Schm Description Description PART NO. PART NO. Ref. Ref. C214 UA655120 C.MYLAR 0.12uF XL401 VV949900 RSNR.CRYS 17.734475MHz V3750200 PIN L=70 C215 UR837470 C.EL 47uF C216 UR865100 C.EL 0.1uF C217 UR865100 C.EL 0.1uF C218 UR866100 C.EL V3013900 P.C.B.
  • Page 56 RX-V795a/RDS/HTR-5170 P.C.B. OPERATION Schm Schm Description Description PART NO. PART NO. Ref. Ref. C351 UB051220 C.CE.M.CHP 22pF IC353 XT208A00 IC HD74HC153P MPX C352 UB045100 C.CE.M.CHP 0.1uF JK901 VJ726800 JACK.MNI (UCA) C353 UB045100 C.CE.M.CHP 0.1uF JK902 VJ726800 JACK.MNI (UCA) C354 UB045100 C.CE.M.CHP 0.1uF...
  • Page 57 RX-V795a/RDS/HTR-5170 P.C.B. OPERATION & INPUT Schm Schm Description Description PART NO. PART NO. Ref. Ref. SW129 VG392900 SW.TACT SKHVAA UA952100 C.MYLAR 100pF 50V(UCRTAL) SW130 VG392900 SW.TACT SKHVAA VK533800 C.PP 47pF 200V(BG) SW201 VV885000 SW.PUSH SPUN22 2 VK533900 C.PP 100pF 200V SW901 VS602600 SW.SLIDE...
  • Page 58 RX-V795a/RDS/HTR-5170 P.C.B. INPUT & MAIN Schm Schm Description Description PART NO. PART NO. Ref. Ref. UA954270 C.MYLAR 0.027uF VU172600 DIODE.ZENR UDZS10B 10V UA954270 C.MYLAR 0.027uF D821 VD631600 DIODE 1SS133,176,HSS104 UR847100 C.EL 10uF D822 VR253700 DIODE.BRG S1NB20 1.0A 200V UR847100 C.EL...
  • Page 59 RX-V795a/RDS/HTR-5170 P.C.B. MAIN Schm Schm Description Description PART NO. PART NO. Ref. Ref. V4108600 P.C.B. MAIN(BGL) C532 UR867470 C.EL 47uF CB501 Vi878400 CN.BS.PIN C533 UR867470 C.EL 47uF CB502 VK025500 CN.BS.PIN C534 VK533900 C.PP 100pF 200V CB521 VQ584700 CN.BS.PIN C535 VR325000 C.MYLAR...
  • Page 60 RX-V795a/RDS/HTR-5170 P.C.B. MAIN Schm Schm Description Description PART NO. PART NO. Ref. Ref. D712 VM974900 DIODE.ZENR HZS9A2TD 9.0V C735 UR867470 C.EL 47uF C736 UR867470 C.EL 47uF D713 VR253700 DIODE.BRG S1NB20 1.0A 200V C737 VR325000 C.MYLAR 100pF 100V D714 VR253700 DIODE.BRG S1NB20 1.0A 200V C738 UR857470 C.EL...
  • Page 61 RX-V795a/RDS/HTR-5170 P.C.B. MAIN & TUNER Schm Schm Description Description PART NO. PART NO. Ref. Ref. R713 HV753220 R.CAR.FP 2.2Ω 1/4W Q712 iP011600 TR.PAIR 2SA1358/C3421 O,Y Q713 iC224030 2SC2240 GR,BL R724 HV753220 R.CAR.FP 2.2Ω 1/4W Q715 VN996900 TR 2SC4495 R737 HV753220 R.CAR.FP 2.2Ω...
  • Page 62 RX-V795a/RDS/HTR-5170 P.C.B. TUNER & TUNER/SMD Schm Schm Description Description PART NO. PART NO. Ref. Ref. UR837470 C.EL 47uF VG278600 C.CE.TUBLR 330pF UM416100 C.EL VD631600 DIODE 1SS133,176,HSS104 VF467300 C.CE.TUBLR 0.01uF VD631600 DIODE 1SS133,176,HSS104 VF467300 C.CE.TUBLR 0.01uF VG437700 DIODE.ZENR MTZJ5.6B 5.6V VF467300 C.CE.TUBLR 0.01uF GG000560 FLTR.CE...
  • Page 63 RX-V795a/RDS/HTR-5170 Chip Resistor P.C.B. TUNER/SMD Schm Schm Schm Description Description Description PART NO. PART NO. PART NO. Ref. Ref. Ref. UB044100 C.CE.M.CHP 0.01uF UB044470 C.CE.M.CHP 0.047uF50V RD250000 R.CAR.CHP 0Ω 1/10W UR837470 C.EL 47uF UB012330 C.CE.M.CHP 330pF 50V RD253220 R.CAR.CHP 2.2Ω...
  • Page 64 RX-V795a/RDS/HTR-5170/RX-V795aRDS (R,T only) (J only) EXPLODED VIEW (R,T only) (J only) (EX only) (EX only) 200-1 2-24 3-19 3-16 3-20 2-25 3-18 3-14 2-24 3-13 2-24 3-15 2-21 2-25 3-17 2-21 3-20 3-12 3-14 2-21 3-11 3-17 2-12 (A,B,G,L,R,T only)
  • Page 65 RX-V795a/RDS/HTR-5170 MECHANICAL PARTS Ref. PART NO. Description Remarks Markets 1- 1 V3827200 FRONT PANEL RX-V795aBL 1- 1 V3827300 FRONT PANEL RX-V795aGD 1- 1 V3827400 FRONT PANEL RX-V795aRDS BL 1- 1 V3827500 FRONT PANEL RX-V795aRDS TI 1- 1 V3827600 FRONT PANEL...
  • Page 66 REAR PANEL HTR-5170 V3986900 REAR PANEL HTR-5170 V3987000 REAR PANEL HTR-5170 VV123100 FRAME, TRANS VZ332900 FRAME, FAN V2461100 SHIELD CASE VZ332800 SHIELD CASE COVER VZ333000 SUPPORT, PCB VZ333100 SUPPORT, TRANS. V0042500 D60xH21 VS025000 D60xH21 RX-V795a BL/TI VV544300 D60xH21 HTR-5170 New Parts...
  • Page 67 RX-V795a/RDS/HTR-5170 Ref. PART NO. Description Remarks Markets V2566600 KNOB, LED V2566700 KNOB, LED V2566800 KNOB, LED V0016700 KNOB VV311000 KNOB VV311400 KNOB V2467300 BUTTON V2467400 BUTTON V2467500 BUTTON V2467600 KNOB, ENC V2467700 KNOB, ENC V2467800 KNOB, ENC V2469400 SHEET, WINDOW...
  • Page 68: Remote Control Transmitter

    RX-V795a/RDS/HTR-5170 REMOTE CONTROL TRANSMITTER SCHEMATIC DIAGRAM ROTARY SW Key arrangement MODE 9 : AMP/TUNER 8 : MD/TAPE IC2 : SC501054DW(U,C,L,R,T) 7 : CD SC501055DW(A,B,G) 6 : DSP 1MΩ 5 : DVD/LD OSC1 4MHz 4 : DVD_MENU OSC2 0.1 µF 3 : VCR...
  • Page 69 RX-V795a/RDS/HTR-5170 Parts List for Carbon Resistors Value 1/4W Type Part No. 1/6W Type Part No. Value 1/4W Type Part No. 1/6W Type Part No. 1.0 Ω 3100 3100 10 kΩ 7100 7100 HJ35 HF85 HF45 HF45 1.8 Ω 11 kΩ...
  • Page 70 RX-V795a/RDS HTR-5170...

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