Teac A 170 Service Manual

Page 2

Page:

mu!

10

Contents

Page:
Test Equipment & General Precautions
Specifications & Service Data
Specifications 11

Service Data
List of BIAS/E0 sw. settings vs. tapes.
Location of Parts 8| Controls
Checks & Adjustments - Mechanical -
Pinch Roller Pressure Measurement
Take-up Reel Torque
F.F. & Rewind Torque
Torque Measurement 12
Tape Speed Deviation & Wow/flutter
Partial Dis-assembly 8t Re-assembly Guide
Disassembly Precautions
Pinch Roller Assy
Head Ass'y
Motor Assy
Capstan Ass'y & Drive Belts 13
Lubrication
Level Diagram
Playback System
Recording & Playback System 14
Checks & Adjustments- Electrical -
- Monitoring System -
Minimum Required input Level
Gain Alignment on Dolby IC Amplifer
Specified Input Level Setting 15

Checking the Headphone Output
Calibration of the Level Meter Indication
- Playback System -
Record/Playback Head Azimuth Alignment
Channel Phase Difference
Optimum Azimuth for Maximized Output
Setup of Specified Standard Output Level
Checking Level Meter Indication
Checking the Playback Frequency Response (
Signal-to-noise Ratio - Playback -
- Recording System -
Bias Trap Alignment
Setting up Recording Bias
Position 1 (CrflZ TapE)
Position 2 (Hi-Fi Tape)
Setting up of Specified Recording Level
Location of the Adjustment Controls
Frequency Response - Overall A
Total Harmonic Distortion 1
Channel Separation Test
Erasure Efficiency
System Functional Diagram
Checks 8t Adjustments - contd -
Dolby NR Effect Measurement
Signal-to-noise Ratio - Overall -
Crosstalk Measurement
Trouble-shooting Guide

«-

Noise reduction circuit made under license

from Dolby Laboratories Inc. The word
"DOLBY" and the Double-D symbol are trade»

marks of Dolby Laboratories Inc.

Page 19

Parts marked with * require longer delivery time than regular parts.

REF. NO. PARTS NO. DESCRIPTION REMARKS
1- 1 55330100 Cover, Cassette
1- 2 * 55310022 C318, Top
1- 3 it 55542530 Plate. Reflective
1- 4 it 55320030 Name Plate
1- 5 55340900 Knob, Put.
1- 6 55240151 Spring, Cassette Cover Release
1- 7 : 55542520 Lever, Hook; Cassette Cover Release
1- 3 I: 55441 200 Washer, Shoulder
1» 9 * 55542511 Bracket, Retaining; Cassette Cover Shaft
1710 552401 BO Spring, Cassette Cover
1-1 1 55202670 Spring, Cassette Cover; Right
1-12 at 50826530 Shaft, Cassette Cover
1-13 alt 55542500 Mask, Fat.
1-14 # 55500251 Spacer, lnsul. Paper
45 50446540 SW, Micro ($510, 5511)
1'16 3 55542820 Lever, Micro SW
1-17 55202580 Spring, Micro SW
1-18 * 55400450 Washer, shoulder; Hook Lever Arm
1-19 3 55020350 Case Assy, Wooden; B EX, EUROPE
it 55020330 Case Assy, Wooden; A DM, TCA
1-20 A: 55340890 Cover, Voltage Selector EX, EUROPE
INCLUDED ACCESSORIES
REF. NO. PARTS N0. DESCNPTION REMARKS
51280010 Cords, Innuroutpur Connection, 2 used
57100300 Cleaning Stick (TZ-275)
50291350 Silicone Cloth
5101 3330 A-170 Owner's Manual DM
51013340 A»1 7D Owner's Manual EX, EUROPE
51013350 A7170 Owner's Manual TCA
5101 3450 Information Supplement, Cassette