Lexicon RV-8 User manual

RV-8
Receiver
Service Manual
Harman Specialty Group 3 Oak Park, Bedford, MA, 01730-1413 USA
Customer Service: Telephone: [phone] | Service Fax: [phone] | www.lexicon.com
Part No. 070-17537 | Rev 0

IMPORTANT SAFETY INSTRUCTIONS
1. Read and keep these instructions.
2. Heed all warnings.
3. Follow all operation instructions.
4. Do not use this apparatus near water.
5. Clean only with a dry cloth.
6. Do not block any ventilation openings.
7. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus
(including amplifiers) that produces heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as when a power-supply cord or plug is damaged, liquid has been spilled or
objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.
15. Refer to the operating instructions for power requirements. Be advised that different operating voltages may
require the use of different line cord and/or attachment plug.
16. Do not install the unit in an unventilated rack, or directly above heat-producing equipment such as power
amplifiers. Observe the maximum ambient operating temperature listed in the product specification.
17. Never attach audio power amplifier outputs directly to any of the unit’s connectors.
18. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
19. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and radiates radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on. The user is encouraged to try to correct the interference by
one or more of the following measures:
• Re-orient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/ television technician for help.

SAFETY SUMMARY
The following general safety precautions must be observed during all phases of operation, service, and repair of
this unit. Failure to comply with these precautions or with specific warnings elsewhere in these instructions
violates manufacturer safety standards and intended use of this unit. Harman Specialty Group assumes no
liability for failure to comply with these requirements.
GROUND THE INSTRUMENT
To minimize shock hazard, the unit chassis and cabinet must be connected to an electrical ground. The unit is
equipped with a three-wire grounding type plug. It will only fit into a grounding type power outlet. This is a safety
feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete
outlet. Do not defeat the safety purpose of the grounding type plug.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the unit in the presence of flammable gasses or fumes. Operation of any electrical instrument in
such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove unit covers. Qualified maintenance personnel must make component
replacements and internal adjustments. Do not replace components with the power cord connected. Under
certain conditions, dangerous voltages may exist even with the power cord removed. To avoid personal injuries,
always disconnect power and discharge circuits before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person capable of rendering first-aid resuscitation
is present.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install substitute parts or perform any
unauthorized modification to the unit.
DANGEROUS PROCEDURE WARNINGS
Warnings such as the example shown below precede potentially dangerous procedures throughout this
document. Instructions contained in warnings must be followed.
WARNING
Dangerous voltages capable of causing death are present in this unit. Use extreme caution
when handling, testing, or adjusting.

CAUTION
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
The following practices minimize possible damage to circuit boards resulting from electrostatic
discharge or improper insertion.
• Keep circuit boards in their original packaging until ready for use.
• Avoid having plastic, vinyl, or Styrofoam in the work area.
• Wear an anti-static wrist strap.
• Discharge personal static before handling circuit boards.
• Remove and insert circuit boards with care.
• When removing circuit boards, handle only by non-conductive surfaces. Never touch open-edge
connectors except at a static-free workstation.
• Minimize handling of circuit boards.
• Handle each circuit board by its edges.
• Do not slide circuit boards over any surface.
• Insert circuit boards with the proper orientation.
• Use static-shielded containers for storing and transporting circuit boards.
3 Oak Park
Bedford, MA 01730-1413 USA
Telephone: [phone]
Fax: [phone]
www.lexicon.com
Customer Service
Telephone: [phone]
Sales Fax: [phone]
Service Fax: [phone]
WARNING
These service instructions are only intended for use by
qualified personnel. Do not perform any servicing other than
that contained in these instructions unless qualified to do so.
Refer to the Safety Summary on the previous page prior to
performing any service.
“Lexicon” and the Lexicon logo are registered trademarks of
Harman International Industries, Incorporated.
U.S. patent numbers and other worldwide patents issued
and pending.
Product Shipments
16 Progress Road
Billerica, MA 01821-5730 USA
Part No. 070-17537 | Rev 0 | 07/05
© 2005 Harman International Industries, Inc. All rights
reserved.
This document should not be construed as a commitment on
the part of Harman Specialty Group. The information it
contains is subject to change without notice. Harman
Specialty Group assumes no responsibility for errors that
may appear within this document.

TABLE OF CONTENTS
CHAPTER 1 – REFERENCE DOCUMENT & EQUIPMENT LISTS ........................1-1
CHAPTER 2 – GENERAL INFORMATION .............................................................2-1
CHAPTER 3 – SPECIFICATIONS ..........................................................................3-1
CHAPTER 4 – FUNCTIONAL VERIFICATION .......................................................4-1
Performance Verification ................................................................................................... 4-1
Initial Inspection ................................................................................................................. 4-1
Functional Tests ................................................................................................................4-1
Functional Audio I/O Tests ................................................................................................ 4-8
Audio Performance Verification....................................................................................... 4-19
Video Input/Output Tests................................................................................................. 4-22
Lexicon Audio Precision ATE Summary.......................................................................... 4-29
CHAPTER 5 – TROUBLESHOOTING ....................................................................5-1
Diagnostic Categories ...................................................................................................... 5-1
Power On Modes............................................................................................................... 5-1
Diagnostic User Interface .................................................................................................. 5-1
Diagnostic Reporting ......................................................................................................... 5-2
Power On Diagnostics ....................................................................................................... 5-6
Extended Diagnostics Tests.............................................................................................. 5-8
Functional Diagnostic Descriptions ................................................................................. 5-11
Disassembly Instructions................................................................................................. 5-19
CHAPTER 6 – THEORY OF OPERATION .............................................................6-1
RV-8 Amplifier Theory ....................................................................................................... 6-1
RV-8 Analog Board Theory ............................................................................................... 6-4
RV-8 Main Board Theory................................................................................................... 6-9
RV-8 Phono/Microphone Input Board Theory ................................................................. 6-47
RV-8 Tuner Board Theory ............................................................................................... 6-48
RV-8 Video System Theory ............................................................................................. 6-50

CHAPTER 7 – PARTS LIST ............................................................................................. 7-1
Main Board Assembly ...........................................................................................................7-1
VCO Masterclock Board Assembly.......................................................................................7-3
Microphone/Preamplifier Board Assembly............................................................................ 7-4
Tuner Board Assembly .........................................................................................................7-4
IR/Encoder Board Assembly.................................................................................................7-5
Switch/LED Board Assembly ................................................................................................7-5
Headphone Board Assembly ................................................................................................7-6
Analog Input/Output Board Assembly...................................................................................7-6
3 Channel Amplifier Board Assembly ...................................................................................7-9
4 Channel Amplifier Board Assembly .................................................................................7-12
Speaker EMI Filter Board Assembly................................................................................... 7-14
Video Board Assembly........................................................................................................7-15
Video In Board Assembly....................................................................................................7-17
Video Out Board Assembly.................................................................................................7-17
Power Supply Board Subassembly ....................................................................................7-17
Chassis Assembly............................................................................................................... 7-18
FP Mechanical Assembly.................................................................................................... 7-20
Video Mechanical Assembly............................................................................................... 7-20
Tuner/Preamp Mechanical Assembly .................................................................................7-20
Fan Assembly .....................................................................................................................7-21
Power Supply Mechanical Assembly..................................................................................7-21
Bridge Rectifier Assembly...................................................................................................7-21
VCO Mechanical Assembly ................................................................................................7-21
3 Channel Amp Bd Mechanical Assembly..........................................................................7-21
4 Channel Amp Bd Mechanical Assembly..........................................................................7-21
Single Positive Heatsink Assembly.....................................................................................7-22
Single Negative Heatsink Assembly ...................................................................................7-22
Double Positive Heatsink Assembly ...................................................................................7-22
Double Negative Heatsink Assembly..................................................................................7-22
Mounting Bracket Assembly (Option) .................................................................................7-22
Power Cord Options............................................................................................................7-22
Packaging/Miscellaneous ...................................................................................................7-22

ASSEMBLY DRAWINGS
080-14834 PC,ASSY DWG,MECH VCO
080-15508 PC,ASSY DWG,VIDEO IN BD
080-15518 PC,ASSY DWG,VIDEO OUT BD
080-15528 PC,ASSY DWG,MIC/PREAMP BD
080-15538 PC,ASSY DWG,HEADPHONE BD
080-15548 PC,ASSY DWG,TUNER BD
080-15558 PC,ASSY DWG,MAIN BD
080-15568 PC,ASSY DWG,SW/LED BD
080-15578 PC,ASSY DWG,ANLG I/O BD
080-15588 PC,ASSY DWG,VIDEO BD
080-16158 PC,ASSY DWG,AMP MOD,3CH
080-16168 PC,ASSY DWG,AMP MOD,4CH
080-16178 PC,ASSY DWG,PS BD
080-16188 PC,ASSY DWG,SPKR EMI FILT
080-15644 ASSY DWG,SHIPMENT
080-15645 ASSY DWG,ACCESS
080-15646 ASSY DWG,CHASSIS
080-15647 ASSY DWG,MECH,FP
080-15648 ASSY DWG,MECH,VIDEO
080-15649 ASSY DWG,FAN,60MM
080-15848 ASSY DWG,MECH,TUNER/PREAMP
080-16434 ASSY DWG,AMP,3CH
080-16435 ASSY DWG,AMP,4CH
080-16436 ASSY DWG,MECH,PS
080-16437 ASSY DWG,BRIDGE RECT
080-16438 ASSY DWG,HS,SGL
080-16439 ASSY DWG,HS,DBL
SCHEMATICS
060-13699 SCHEM,IR/ENC BD
060-15509 SCHEM,VIDEO IN BD
060-15519 SCHEM,VIDEO OUT BD
060-15529 SCHEM,MIC/PREAMP BD
060-15539 SCHEM,HEADPHONE BD
060-15549 SCHEM,TUNER BD
060-15559 SCHEM,MAIN BD
060-15569 SCHEM,SW/LED BD
060-15579 SCHEM,ANLG I/O BD
060-15589 SCHEM,VIDEO BD
060-16139 SCHEM,VCO BD,MCLK
060-16169 SCHEM,AMP MOD,4CH,3CH
060-16179 SCHEM,PS BD

Lexicon
CHAPTER 1 – REFERENCE DOCUMENT & EQUIPMENT
LISTS
Reference Document
Refer to the RV-8 User Guide-Lexicon P/N 070-15838.
Required Equipment
The following is a minimum suggested equipment list required to perform the proof of
performance tests:
• High quality amplifier with RCA input connectors and volume control capabilities
• A pair of high quality speakers
• High quality video monitor with composite (RCA), S-video, and component (RCA) input connections
• High quality DVD player with RCA analog L/R outputs, digital coaxial and optical outputs, and
composite, S-video and component outputs
• CD disc for a test audio source
• DVD disc for a test video source
• DAT recorder with digital coaxial and optical record inputs, for testing the digital output of the RV-8
• A pair of stereo headphones
• Variac variable AC power supply (2 amp minimum, 0-220 VAC)
• Digital multimeter (3.5 digits, 0.5% or better accuracy)
• Low Distortion Audio Oscillator with single-ended or balanced analog outputs, switchable 30kHz low-
pass filter or band-pass (20-20kHz) filter, and output THD+N < .001%
• Distortion Analyzer with switchable 30Hz high-pass filter or band-pass (20-20kHz) filter
• Digital Distortion Analyzer
• RS232 DB9 wrap around plugs (These are created by connecting pins 2 & 3 of a female DB9
connector)
• Debug terminal monitor (optional).
Required Cables
• Shielded audio cable with an RCA connector and an appropriate connector on the opposite end for
connection to a Low Distortion Audio Oscillator
• Shielded audio cable with an RCA connector on one end and an appropriate connector on the
opposite end for connection to a Low Distortion Audio Analyzer
• Shielded audio cable (balanced) and an XLR female connector on one end and an appropriate
connector on the opposite end for connection to a Low Distortion Analyzer
• 4 Shielded audio cables with RCA connectors on both ends
• 2 Shielded AES audio cables with XLR male on one end and XLR female on the other
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RV-8 Service Manual
• Digital S/PDIF audio cable with RCA connectors on both ends
• Digital S/PDIF audio cable with optical connectors on both ends
• 2 Video cables with RCA connectors on both ends
• 2 Video cables with S-Video connectors on both ends
• 2 Video cables with 3-wire component RCA connectors on both ends
• RV-8 AC power cord
• RV-8 remote control.
Required Tools
• Clean, antistatic, well lit work area with grounding wrist strap
• Number 1 Phillips tip screwdriver (magnetic tip preferred)
• Number 2 Phillips tip screwdriver (magnetic tip preferred)
• 1/4 hex nut driver, full hollow
• 7/16 hex nut driver, full hollow
• 9/32 hex nut driver, full hollow
• M8 slotted mini-phone jack driver
• Slim needle nose pliers
• 9/32, 7/16, 1/4 and 3/16, sockets 1/8 drive type
• 1/8-Ratchet wrench
• Magnification glasses and lamp
• Surface Mount Technology (SMT) Soldering/De-soldering bench-top repair station.
1-2