Teac GF-450K7 User manual

GF-450K7
NOTES CONTENTS
1 SAFETY INFORMATION ........................................................ 2
2 SPECIFICATIONS ........................................................................ 3
3 ADJUSTMENT AND CHECK .............................................. 4
4 EXPLODED VIEW AND PARTS LIST........................... 8
5 PC BOARDS AND PARTS LIST ..................................... 12
6 WIRING DIAGRAM ................................................................... 18
7 INCLUDED ACCESSORIES............................................... 21
Micro Hi-Fi system
PC board shown are viewed from parts side.
The parts with no reference number or no parts number
in the exploded views are not supplied.
As regards the resistors and capacitors, refer to the
circuit diagrams contained in this manual.
Parts marked with this sign are safety critical
components. they must be replaced with identical
components - refer to the appropriate parts list and
ensure exact replacement.
Parts of [ ] mark can be used only with the version
designated.
[USA] - U.S.A.; [JPN] - Japan
!

2
GF-450K7
1 SAFETY INFORMATION
Optical pickup:
Type : SF-W37SGT
Manufacturer : SANYO ELECTRIC CO., LTD.
Laser output : Less than 1 mW (Play) on the objective lens
Less than 5 mW (Record) on the objective lens
Less than 10 mW (Erase) on the objective lens
Wavelength : 783 nm
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK). NO USER-
SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within
an equilateral triangle, is intended to alert the user
to the presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.

3
GF-450K7
2 SPECIFICATIONS
Amplifier Section
Output power 3.5 W + 3.5 W
Frequency response 60 Hz to 20 kHz
Audio input sensitivity/Impedance AUX: -6dBV(0.5V)/20kΩ
Maximum iutput level AUX:+6dBV(2.0V)
CD Recorder Section
Media type CD-RW and CD-R for Digital audio
(record and playback), CD (playback only)
Recording sampling frequency 44.1kHz
Frequency response 20Hz to 20kHz
(playback:±2dB, recording:±3dB)
Signal to noise ratio More than 90dB (playback)
More than 80dB (recording)
Total harmonic distortion Less than 0.05% (playback)
Less than 0.07% (recording)
Tuner Section
Frequency range(FM) 87.5MHz to 108.0 MHz (100 kHz step) [USA]
Frequency range(AM) 530 kHz to 1,720 kHz (10 kHz step)
Frequency range(FM) 76.0 MHz to 90.0 MHz (100 kHz step) [JPN]
Frequency range(AM) 522 kHz to 1,620 kHz (9 kHz step)
Record Player Section
Motor DC servo motor
Drive system Belt Drive
Speed 33-1/3 rpm, 45 rpm, 78 rpm
Wow and Flutter less than 0.35% (WDT)
Cartridge type Ceramic Stereo Cartridge
Stylus STL-103
Output level 158 -348mV
Cassette tape section
Tracking system 4-track, 2-channel stereo
Tape speed 4.8 cm/sec
Wow&flutter 0.3%
Frequency characteristic 125 to 10,000 Hz
S/N ratio 45 dB
Speaker System Section
Unit 70 mm (3”)
Impedance 4 ohms
GENERAL
Power requirements 120V, 60Hz [USA]
Power requirements 100V, 50~60Hz [JPN]
Power consumption 55 W
Dimensions (W x H x D) 480 x 230 x 380 mm
(18 7/8” x 9 1/16” x 14 15/16”)
Weight 11 kg (24 1/4 lb)
Standard Accessories
Owner’s manual x 1
Warranty card x 1
45 RPM adaptor x 1
Remote control unit (RC-992) x 1 [USA]
Remote control unit (RC-1069) x 1 [JPN]
Battery (AA, R6, SUM-3) x 2
Quick Start Guide for recording x 1
Stereo RCA pin cable x 1
Design and specifications are subject to change without notice.
Weight and dimensions are approximate.
Illustrations may differ slightly from production models.

4
GF-450K7
3 ADJUSTMENTS AND CHECKS
ALIGNMENT PROCEDURES
3-1 TUNER SECTION
Use a screwdriver with a plastic or ceramic grip for all adjustment.
3-1-1 FM adjustment
1.Set the function switch to the FM position.
2.Connect the signal generator output through a 75 ohm dummy antenna to "ANT" on MAIN PCB.
3.Connect the oscilloscope to the speaker terminal.
4.Set the signal generator as listed in the alignment chart.
3-1-2 AM adjustment
1.Set the function switch to the AM position.
2.Connect the test loop antenna across the output of the signal generator.
3.Connect the oscilloscope to the speaker terminal.
4.Set the signal generator as listed in the alignment chart.
3-1-3 Turntable Section
1.Set the function switch to the PHONE position.
2.Connect the oscilloscope to the speaker terminal.
3.Use a HP-4005 record for all adjustment.
3-2 Adjustment and Test Points
Spec. Limit 1 2 3 UNIT
zHK01-/+525dnEwoL
zHK03-/+0371dnEhgiH
zHK5-/+554
m/vuBd8525zHK006
m/vuBd8525zHK0001
m/vuBd8525zHK0041
m/vuBd4685zHK006
m/vuBd4665zHK0001
m/vuBd4665zHK0041
05. I.F.Rejection(Max.Sens) bd0353zHK006ta
bd5203zHK0041ta)Vm5(noitcejeRegamI.60
%515.F.1x2m/Vm5tateewT.70
%//.F.1x3
bd5102zHK0001tazHK01-/+.A.C.A.80
zHK9-45
bd0353
%52
W5.36.3
zH521001
zHK22.2
VM013)emuloVniM(esioN&muH.41
bd5304
02. I .F
01. Tuning Range
ITEM
03. MAX. Sens.
04. Sen. For -20db S/N
09. Band Width -6db at 10% 1000khz Max Sens
10. A.G.C.(-10db) at 1000KHz 100db/m
11.T.H.D. 74db/m 30%MOD
12. Power Output at 10% THD 80%74db/m
13. Ferq. Resp. -Low
-6 db High
15. HUM Modulation 100db/m
:DEVORPPA:YBTSET:SKRAMER
120 V UL model Tuner adjustments AM


5
GF-450K7
120 V UL model Tuner adjustments FM

Spec. Limit 1 2 3 UNIT
zHM5.0-/+5.78dnEwoL
zHM5.0-/+5.801dnEhgiH
zHK2.0-/+7.01
bd0231ZHM09
bd0231zHM89
bd0231zHM601
bd6202zHM09
bd6202zHM89
bd6202zHM601
bd8304
06.Image Rejection at 106MHz bd8102
bd5152
30 25 db
09. A.F.C Holding at 98MHz 1mV 300 +/-250 KHz
bd0454
%21
W5.36.3
%0301
zH05105
zHK45.4
VM51
db
bd5281
bd6203
bd31
bd43
ITEM
01. Tuning Range
02. Intermediate Frequency
03.MAX. Sens.
04. Sen. For -30db S/N
05. I.F.Rejection
07.-3db limiting Sens . at98MHz 1mV
08. A.M.Suppression at 98MHz 1mV
10.S/N Ratio at 98MHz 1mV
11.T.H.D. 22.5KHz DEV.
12. Power Output at 10% THD 75KHz DEV 1mv
Max. v olume T.H.D
13. Ferq. Resp. -6db -Low
High
14. HUM & NOISE (Min. Volume)
01.Stereo Indication Sens.at 98Mhz 75KHz Dev.1KHz
02.Separation at 98 MHz 1mV 40KHz Dev.
03. Channel Balance
04. Stereo Distortion at 98MHz 1mV 45KHz Dev.
Multiplex:
TEST BY : APPROVED:REMARKS

6
GF-450K7
AM I.F. ALIGNMENT
1. Set the POWER BUTTON to POWER "ON".
2. Set the Radio and band button to Radio and AM BAND.
3. Connect a SWEEPSCOPE OUTPUT to AM antenna terminal.
4. Connect a SWEEPSCOPE INPUT to pin17 of IC2 through a 1uf capacitor and ground.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 4455KHz GANG OPEN T3 CENTER
&MAXIMUM OUTPUT
AM R.F. ALIGNMENT
1. Connect an RF generator to a standard radiating loop.
2. Connect a SCOPE and VTVM across the speaker output.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 515KHz GANG CLOSED L6
MAXIMUM
OUTPUT
2 1640KHz GANG OPEN PVC-D
3 600KHz 1400KHz L4
4 1400KHz 1400KHz PVC-C
5 REPEAT STEPS 3 AND 4 TO OBTAIN BEST TRACKING.
FM R.F. ALIGNMENT
1. Connect an RF generator to the FM antenna terminal and ground.
2. Connect a SCOPE & VTVM across the speaker output.
STEP SET SIGNAL SET DIAL ADJUST ADJUST FOR
1 76MHz GANG CLOSED L3
MAXIMUM
OUTPUT
2 108MHz GANG OPEN PVC-A
3 90MHz 90MHz L2
4 106MHz 1106MHz PVC-B
5 REPEAT STEPS 3 AND 4 TO OBTAIN MAX ADJUST.
100 V JPN model Tuner adjustments

7
GF-450K7
MAIN PCB
MAIN PCB

GF-450K7
8
4 EXPLODED VIEWS AND PARTS LIST
EXPLODE VIEW

9
GF-450K7
REF. NO. PARTS NO. DESCRIPTION REMARKS
1 56-04GF3500B050 FRONT PANEL (HIPS) JAPAN BLACK [JPN]
56-04GF3500B030 FRONT PANEL (HIPS) JAPAN BLACK [USA]
2 56-07GF3500B000 DIAL BRACKET(ABS)
3 56-07GF3501B000 PULLEY BKT (1) (ABS)
4 56-07GF3502B000 PULLEY BKT (2) (ABS)
5 56-07GF35039000 DISPLAY BACKET HOLDER (ABS)
6 56-07GF35049000 TUNING BACKLIGHT HOLDER(ABS)
7 56-07GF3505B000 LIGHT BKT(ABS)
8 56-14GF3500B010 CD DOOR (ABS)(BLACK 931289) 429C
9 56-22GF35008010 DIAL BACK LIGHT LENS COVER-L(ABS)(gray 91144)
10 56-22GF35018010 DIAL BACK LIGHT LENS COVER-R(ABS)(gray 91144)
11 56-25GF3500B000 DIAL DRUM (ABS)
12 56-54GF35008000 TUNING KNOB (ABS)(gray8402C)
13 56-54GF35018000 VOLUME/REC. LEVEL KNOB (ABS)(gray8402C)
14 56-54GF3502B000 POWER SWITCH KNOB (ABS)(BLACK 931289)
15 56-54GF3503B000 FUNCTION KNOB (ABS)(BLACK 931289)
16 56-54GF3504B000 RECORD KNOB (ABS)(BLACK 931289)
17 56-54GF3505B010 STOP/PLAY/PAUSE KNOB (ABS)(BLACK 931289)
18 56-54GF3506B010 OPEN/CLOSE KNOB (ABS)(BLACK 931289)
19 56-54GF3507B000 DELETE KNOB (ABS)(BLACK 931289)
20 56-54GF3508B000 SKIP/REW KNOB (ABS)(BLACK 931289)
21 56-57GF35000030 DISPLAY LENS (PMMA)TEAC [JPN]
56-57GF35000040 DISPLAY LENS (PMMA) [USA]
22 56-57GF35019000 REC KNOB LENS (PMMA)
23 56-57GF35020000 LCD BACKLIGHT LENS (PMMA)
24 56-57GF35030010 TUNING BACKLIGHT LENS (PMMA)
25 56-69GF3500B000 WOODEN BOX COVER PLATE (ABS)(BLACK 931289)
26 56-75GF3500G000 POINT (ABS) (CHROME)
27 56-76ST1500B000 DIAL PULLEY (POM)
28 56-79GF3500B000 TUNING SHAFT(ABS)
29 57-08ST15000120 PVC PLATE 22x8x1mm (BLACK)
30 56-80S16800B000 SPEAKER PANEL STUD (PE) BLACK
31 56-86GF3500B000 SPEAKER FRAME-L (HIPS)
32 56-86GF3501B000 SPEAKER FRAME-R (HIPS)
33 57-26GF35000020 FILTER PLATE (1) 114x22.6x0.1mm
34 57-26GF35000120 FILTER PLATE (2) 118.1x20.8x0.3mm
35 58-263102200020 RUBBER FOOT(PORON) DIA10mm T=2mm
36 58-263182600020 RUBBER FOOT DIA18 T=6mm (AC619)
37 58-70GF35000420 REAR BOARD 100V "TEAC GF-450-K7" [JPN]
58-70GF35000621 REAR BOARD 120V "TEAC GF-450-K7" R1 [USA]
38 58-71GF35000220 WOODEN PLATE 230x292x3mm
39 58-71GF35000420 WOODEN BOARD 449.6x58x9mm (BLACK)"GF450-K7
40 58-71GF35000520 WOODEN TOP COVER (BLACK) "GF450-K7"
41 58-73GF35000220 WOODEN BOX (PVC: F-2905-53) "GF450-K7"
42 61-11GF35000021 CD MACHINE BRACKET (L)
43 61-11GF35000120 CD MACHINE BRACKET (R)
44 61-11GF35000221 WOODEN BRACKET R1
45 61-11SN11600021 PVC BRACKET
46 61-22SG19000020 BUSHING MOUNTING PLATE
47 61-25SCD6600020 CONTACT PLATE (THK 1.2mm) 11x11x8mm
48 61-57GF35000020 LOOSE LEAF
49 61-57GF35000120 WOODEN BOX OPEN/CLOSE SHAFT
50 61-95T060800020 SPRING DIAL
51 66-120226150321 MACHINE SCREW RoHS MS/BH 2.6x5mm
52 66-120230180321 MACHINE SCREW RoHS MS/BH 3x8mm
EXPLODED VIEW

10
GF-450K7
53 66-120230210321 MACHINE SCREW RoHS MS/BH 3x10mm
54 66-120930214121 MACHINE SCREW RoHS MS/CH 3x14mm (BLACK)
55 66-120240222321 MACHINE SCREW RoHS MS/BH 4x22mm
56 66-120330160321 MACHINE SCREW RoHS MS/PH 3x6mm
57 66-120526140321 MACHINE SCREW RoHS MS/KH 2.6x4mm (H:4mm)
58 66-120830220321 MACHINE SCREW RoHS MS/WH 3x20mm
59 66-140226180321 SELF-TAPPING SCREW RoHS TA/BH 2.6x8mm
60 66-140230180121 SELF-TAPPING SCREW RoHS TA/BH 3x8mm (BLACK)
61 66-140230210121 SELF-TAPPING SCREW RoHS TA/BH 3x10mm (BLACK)
62 66-140230210321 SELF-TAPPING SCREW RoHS TA/BH 3x10mm
63 66-140230212121 SELF-TAPPING SCREW RoHS TA/BH 3x12mm(BLACK)
64 66-140230214121 SELF-TAPPING SCREW RoHS TA/BH 3x14mm(BLACK)
65 66-140230214321 SELF-TAPPING SCREW RoHS TA/BH 3x14mm
66 66-140330180321 SELF-TAPPING SCREW RoHS TA/PH 3x8mm
67 66-140330210321 SELF-TAPPING SCREW RoHS TA/PH 3x10mm
68 66-140530180121 SELF-TAPPING SCREW RoHS TA/KH 3x8mm(BLACK)
69 66-140830210321 SELF-TAPPING SCREW RoHS TA/WH 3x10mm
70 66-141430210321 SCREW RoHS TA/WH 3x10mm(HEAD:10mm)
71 66-150330160321 SELF-TAPPING SCREW RoHS TB/PH 3x6mm
72 66-150830180121 SELF-TAPPING SCREW RoHS TB/WH 3x8mm(BLACK)
73 66-170230160103 HARDEN SCREW RoHS STTB 3x6mm AB(BLACK) RoHS
74 67-021300000120 NUT+WASHER DIA M3mm
75 67-021400000020 NUT M4mm
76 68-112403101000 METAL WASHER 4x10x1mm
77 68-412400000000 RING E TYPE 4mm
78 06-200GF3501001 CD MECH ASSY, CRD-RA2A (205010)
79 18-201GF3500120 H/TRANSFORMER EI66 100V TJ61193F0 [JPN]
18-203GF3500120 H/TRANSFORMER EI66 120V TU61153F0 [USA]
80 190021093100220 SPEAKER 3" 10W 4Ω #JHD-SA78-25
81 20-60ST15000000 PHONOGRAPH MECHANISM #H10B (HANPIN)
58-43GF35000020 BELT, PHONOGRAPH MECH 9A10630600
82 41-193220000220 POWER SWITCH (WELLLONG) SP3-22SPA-W4CZ
83 43-500000002020 AC CORD BUSHING T=1.6mm #4N4
84 05-GF4500100000 PCBA-MAIN -JAPAN "GF450-K7" [JPN]
05-GF4500100010 PCBA-MAIN -UL "GF450-K7" [USA]
85 05-GF4500400000 PCBA-DIS-JAPAN "GF450-K7"
86 PCBA-HP UL.............................................................................. Included in Ref. No. 84 PCBA-MAIN, refer
to page 12
87 PCBA-AUX UL........................................................................... Included in Ref. No. 84 PCBA-MAIN, refer
to page 12
88 56-07GF4501B010 PUSH KNOB BRAOKET (ABS) [JPN]
56-07GF4501B020 PUSH KNOB BRAOKET (ABS) [USA]
89 56-55GF4500B000 CASSETTE KNOB (ABS) SP572#931289
90 61-11SCD6600020 REC. PCB BRACKET (1.0mm THK)
91 20-06GF35000020 F/CASS DECK JS-21FB8947-SGS "GF450-K7"
92 05-GF4502000000 PCBA-CASS -JAPAN "GF450-K7"
93 56-01GF35000020 45 RPM ADAPTER (100-S300-069)
94 45-113420300150 AC CORD UL APP L=420mm 105C BLK
95 41-142210010820 SWITCH SSE-22F10-G8-NS/SS-22F10-G8................................ included in Ref. No. 92 PCBA-CASS, refer
to page 17
96 LED PCB .................................................................................. included in Ref. No. 85 PCBA-DIS, refer
to page 14
EXPLODED VIEW
REF. NO. PARTS NO. DESCRIPTION REMARKS