Onkyo TA 250 Service Manual
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Extracted text from Onkyo TA 250 Service Manual (Ocr-read)
Page 1
TA-250
Ref. No. 3464
CASSETTE TAPE DECK
MODEL TA - 2 5 0
UP. 1th: . 230VAC. SUI-I2
UW 120 ZZOVAC. 50 60Hz
SPECIFICATIONS
Track Format: trucks, Z-ehannels
Etuing Sysrzm: AC erase
TapeSpeui: 4.3 cm/sec.(l-7/8 i.p:.)
Wow and Flutter. 0.045% (WRMS)
SAFETY-RELATED COMPONENT WARNINGII 099 (1304)
Frequency Response: 20-l8.000I-{z (normal)
COMPONENTS IDENTIFIED BY MARK A ON attg'lbgtaogzfifi)
THE SCHEMATIC DIAGRAM AND IN THE PARTS (so-15.000Hzfigds)
LIST ARE CRITICAL FOR RISK OF FIRE AND ffiféoggflggefig
ELECTRIC SHOCK. REPLACE THESE COM- 5m Rm: 60,13 (metal mpg Dolby NR m)
PONENTS WITH ONKYO PARTS WHOSE PARTS
NUMBERS APPEAR AS SHOWN IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT
EXPOSED PARTS ARE ACCEPTABLY IN~
SULATED FROM THE SUPPLY CIRCUIT BEFORE
RETURNING THE APPLIANCE TO THE
CUSTOMER.
ONKYO.
AIIIIIII IIIIMPIIIIIIIIS
A noise rcduction of 10dB above
Sid-[z and 5:18 at lid-I2 ix possible
with Dolby 8 NR. A noise reduction
(5me II 5kHz is possiblz with
Dolby c NR.
lnput Jacks: LINE IN: 2
Input sensitivity: 80 mV
Input impedance: 50 Itohms
Output Jacks: LINE OUT: 2
Standard output level: 500 mV
(0d?)
Optimum load impedance: Mr
50 Itohmx
Headphone jachl
Optimum load impedancc:8 to
200 ohms
MOIDI'S: DC servo motor. I
DC molar. 3
Heads: REC/PB: Special Hard Permalloy x 2
Erase head; Ferrite x 1
Power Supply Rating: UK. and Australian models
AC 240 V 50 Hz
European models (Except U.I(.)
AC 230 V, SOHZ
Worldwide models
AC 120 and 220 V. Switchable
50/60Hz
Power Consumption: t3 watts
Dimensions: 455M) x 1200-0 x 310(D)mm
17 lie" I 4 Vi" x 11 lm"
Weight: 5.0 kg.(ll.0lbx.)
pccificnlions and extemal appearance are subject to chmge with-
out notice bccnuse of product improvements.
Page 7
MICROCOMPUTER TERMINAL DESCRIPTION (HD40A4240A57S)
Port no. Name l/O Description
1 POWER OFF IN Power off detection
2 TEST MODE
3 RI OUT OUT RI cord output
4 RI IN IN RI cord Input
5 NORMAL OUT REC/PB equalizer control active:H
6 HIGH OUT
7 METAL OUT
8 70/120 OUT
9 TAPE IN SH IN Cassette in detection activeIL
10 REC INH.SH IN Recording prevention.active2H
11 HIGH SH IN Tape position selection
12 METAL SW IN actlvezfl
13 POSITION SHI IN Head posltlon detection switch
14 POSITION 5H2 IN
15 :SEARCH SIGNAL IN Search signal input
16 R.SENSOR(T) IN Reel rotation puIse input
17 REEL FF OUT Reel motor control,active:H
18 REEL REV OUT
19 D-PLAV OUT Reel motor torque control
20 CAPSTAN OUT Capstan motor control
21 V00 IN +5V
22 CLOCK OUT Clock to counter micon
__ 23 SLAVE DATA IN Data input from counter micon
24 MASTER DATA OUT Data output to counter micon
25 NC
26 SYSTEM RESET IN System micon reset
27 TEST
28 OSC 1 System clock AMHz
29 OSC 2 System clock
30 GND
31 ASSIST UP OUT Assist motor control.activeZH
32 ASSIST DOWN OUT
33 SLAVE RESET OUT Counter micon reset.active:L
34 LINE MUTE OUT Line mutins,activeZH
35 REC MUTE OUT Recording muting,active:fl
36 BIAS OUT Blas control.active:H
37 SOURCE/TREE OUT Source/tape selectlon
38 MPX ON/OFF OUT MPX.filter ON/OFF control active:H
39 DOLBV ON/EFF OUT Dolby lc control
40 00st 37c OUT
41 NC
42 NC
250