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Yamaha TX-396L Service Manual

Yamaha TX-396L Service Manual

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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, certification or
recognition of any applicable technical capabilities, or
establish a principle-agent relationship of any form.
I CONTENTS
..........................................................
INTERNAL VIEW ...........................................................
DISASSEMBLY PROCEDURES
ADJUSTMENTS
......................................................... 3~7
1 0 0 7 0 0
AM/FM STEREO TUNER
TX-396L
IMPORTANT NOTICE
..........................................
1
1
2
2
................................... 2
SERVICE MANUAL
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.
µ
.................................................................. 8
DISPLAY DATA
............................................................. 9
................................................. 10~11
PRINTED CIRCUIT BOARD
........................................ 14~15
........................................................... 16~21
TX-396L
.................................. 12~13
P.O.Box 1, Hamamatsu, Japan

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Summary of Contents for Yamaha TX-396L

  • Page 1: Table Of Contents

    TX-396L SERVICE MANUAL IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA The data provided is believed to be accurate and applicable to the unit(s) Retailers and their service personnel. indicated on the cover. The research, engineering, and service departments It has been assumed that basic service procedures inherent to the industry, of YAMAHA are continually striving to improve YAMAHA products.
  • Page 2: To Service Personnel

    TX-396L I TO SERVICE PERSONNEL AC LEAKAGE WALL EQUIPMENT TESTER OR OUTLET UNDER TEST EQUIVALENT Critical Components Information. Components having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. INSULATING TABLE WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD.
  • Page 3: Rear Panel

    TX-396L I INTERNAL VIEW 1 Tuner P. C. B (1) 2 Front-end pack 3 Operation P. C. B. (2) 4 Tuner P. C. B. (2) 5 Operation P. C. B. (1) 6 Operation P. C. B. (3) I REAR PANEL I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)
  • Page 4 1. Before Adjustment (1)All the segments on the display light up. (1)With the power turned on, wait for 5 minutes before (2)The model name, TX-396L is displayed. starting adjustment so that operation becomes stable. (3)The place of destination is displayed.
  • Page 5 TX-396L G TEST POINTS DISCRIMINATOR BALANCE LINE OUT AM ANT GND FM ANT MONAURAL DISTORTION L13 L12 VR4 STEREO DISTORTION SEPARATION FRONTEND SIGNAL METER AM SENSITIVITY <FM TUNER SECTION> Reception Adjusted Test point Step Adjustment item Signal (ANT IN) Rating...
  • Page 6 TX-396L Reception Adjusted Step Adjustment item Signal (ANT IN) Test point Rating frequency point Verification of monaural FM SG: Same as Step 1. OUTPUT Minimize distortion. distortion. 98.1 MHz 70 dBµ (to less than 0.7%) Modulation : 100 % Monaural : 1 kHz...
  • Page 7 TX-396L AM loop antenna <MW TUNER SECTION> • To be adjusted after FM section adjustment. • Use the specified dummy anetenna for loop antenna. AM dummy antenna AM ANT Reception Adjusted Test point Step Adjustment item Signal (ANT IN) Rating...
  • Page 8 TX-396L <LW TUNER SECTION> AM loop antenna • To be adjusted after MW section adjustment. • Use the specified dummy anetenna for loop antenna. AM dummy antenna AM ANT Reception Adjusted Test point Step Adjustment item Signal (ANT IN) Rating...
  • Page 9: Com Data

    TX-396L µ -COM DATA IC501 : LC866420A 8 bit µ-COM Port Name Function Port Name Function P17/PWM0 /MMUTE Main mute VDD2 ROT1 Rotary encoder input VDDVPP –24V ROT0 This input available for ROTSW=H S16/PC0 FL segment MODEL Model 0 S17/PC1...
  • Page 10 TX-396L I DISPLAY DATA (13-BT-152GK) PIN CONNECTION PIN NO. CONNECTION NP P15 P14 P13 P12 P11 P10 P9 PIN NO. CONNECTION 2G 3G 9G 10G 11G 12G 13G NP NOTE: 1) F1, F2 ....Filament 2) NP ....... No pin 3) NC .......
  • Page 11: Block Diagram

    TX-396L I BLOCK DIAGRAM MPX IC FM DET COIL AM/FM IF IC FM FRONT END IC3 : LA3401 IC2 : LA1266 RF AMP Q2, 5 Q3, 4 FM IF AMP MIXER L ch MUTE FM/AM FM 75Ω DECODER MUTING Q19,20...
  • Page 12 TX-396L I PRINTED CIRCUIT BOARD (Foil side) FM ANT GND AM ANT TUNER P.C.B. (1) LINE OUT DISCRIMINATOR MONAURAL SEPARATION TUNER P.C.B. (2) BALANCE DISTORTION OPE P.C.B. (2) SIGNAL METER To TUNER P.C.B.(2) AM SENSITIVITY STEREO ANGND DISTORTION ANGND POWER From OPE P.C.B.(2)
  • Page 13: Schematic Diagram

    TX-396L SCHEMATIC DIAGRAM Each voltage given here represents that in the FM (98.1 MHz, STEREO) reception mode but the one in the parentheses ( ) is that in the AM (1080 kHz, MAN'L) reception mode. FRONTEND VT : FM 87.5 MHz 98.1 MHz...
  • Page 14 TX-396L SCHEMATIC DIAGRAM 5.5(5.5) 5.2(5.2) 5.5(5.5) 4.8(4.8) 5.5(5.5) 0(0) pin 12 of IC501 11.5(11.5) 11.4(11.5) 4.9(4.9) 4.7 (4.7) 10.7 (10.7) 0(0) 0(0) 0(0) 0(0) 5.5(5.5) 5.2(5.2) 4.7(4.7) 0(0) -13.4(-13.6) 0(0) -11.7(-12.0) 0(0) -11.2(-11.5) 5.3(0) -11.0(-11.2) To TUNER (1) 0(0.1) -10.7(-10.9) see page 14 0(0.1)
  • Page 15: Parts List

    TX-396L I WARNING PARTS LIST Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally in- stalled. I ELECTRICAL PARTS G Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS List.
  • Page 16 TX-396L Schm Schm Ref. PART NO. Description Ref. PART NO. Description V4907000 P.C.B. TUNER UR867100 C.EL 10uF Vi878100 CN.BS.PIN FG644100 C.CE 0.01uF Vi878100 CN.BS.PIN FG644100 C.CE 0.01uF VF728300 CN FG644100 C.CE 0.01uF VU271700 CN UJ749220 C.EL 2200uF 25V VG879900 CN.BS.PIN FG644100 C.CE...
  • Page 17 TX-396L Schm Schm Ref. PART NO. Description Ref. PART NO. Description iC174020 2SC1740S R,S V4907100 P.C.B. OPERATION * Q10 VR497000 TR 2SC1809S N,P CB501 VU281700 CN VG722000 TR.DGT DTC144ES CB502 Vi878200 CN.BS.PIN * Q13 VR497000 TR 2SC1809S N,P CB503 Vi878200 CN.BS.PIN...
  • Page 18 TX-396L I EXPLODED VIEW...
  • Page 19 TX-396L I MECHANICAL PARTS Ref. PART NO. Description Remarks Markets * 1- 1 V4907100 P.C.B. ASS’Y OPERATION 1- 5 MF117160 FLEXIBLE FLAT CABLE 17P 160mm * 1-11 V4857100 FRONT PANEL * 1-11 V4857200 FRONT PANEL 1-13 VV244200 SUPPORT * 1-21...
  • Page 20 TX-396L 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 ❊ 3180 11 kΩ...