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1

STEREO

300Hz

approx.

300Hz

approx.

(“ ST ”  indicator lights)

sine

240 mVp-p

sine

15 mVp-p

wave

wave

2

MONO

300Hz

approx.

300Hz

approx.

(NO indicators)

sine

120 mVp-p

sine

120 mVp-p

wave

wave

3

SAP

300Hz

approx.

300Hz

approx.

(“ SAP ”  indicator lights)

sine

120 mVp-p

sine

180 mVp-p

wave

wave

4

SAP

300Hz

approx.

(“ SAP ”  indicator lights)

–

sine

180 mVp-p

wave

7. Set the TV multichannel sound generator (STEREO switch :

Lch, INT FREQ switch : 3 kHz), and confirm that the
difference between the AUDIO OUTPUT terminal (L)
and (R) is more than 25 dB.

8. Set the TV multichannel sound generator (STEREO switch :

Rch, INT FREQ switch : 300 Hz), and confirm that the
difference between the AUDIO OUTPUT terminal (L)
and (R) is more than 20 dB. If not, repeat steps 5 to 8.

Measurement of steps 5 through 8, be sure to
connect the BPF between oscilloscope and AUDIO
OUTPUT terminals.

1. Input the output signal of the TV multichannel sound

generator into VCR ANT input terminal. Set the TV multi-
channel sound generator (INT FREQ switch : 300 Hz,
STEREO switch : L + R, SAP switch : ON, PILOT switch :
ON).

2. Receive the signal of TV multichannel sound generator,

and confirm so that the “ L + R ” within the monitor TV
when PILOT switch to ON.

3. Confirm “ ST ” and “ SAP ” within the VCR indicator panel

lights.

4. Confirm the waveform of the AUDIO OUTPUT terminal (L)

and (R) on the oscilloscope.

5. Set the multichannel sound generator as follows.

     PILOT switch : ON, STEREO switch : Lch.

6. Press the VCR PROGRAM button to set ON-SCREEN

MENU, and select the VCR SETUP menu.

7. Confirm that the waveforms of the AUDIO OUTPUT terminal

(L) and (R) become “ No. 1 to 3 ” in the table below when
selecting the MTS mode on the next screen, “ MONO ” 

n

“ STEREO ” 

n

 “ SAP ” sequentially.

8. Set the TV multichannel sound generator (EXT terminal : no

input, EXT (MONO) switch : ON).

9. Confirm that the waveforms of the AUDIO OUTPUT terminal

(L) and (R) become “ No.4 ” in the table below when selecting
the VCR SETUP menu then setting the MTS mode to “ SAP ”.

 CH : 1

TV multichannel

E-E mode

 AUDIO OUTPUT    sound generator
   terminal (L)

Oscilloscpe

 CH : 2
 AUDIO OUTPUT
   terminal (R)

–

–

• In this model, the circuits of the TUNER, IF, and RF

converter have been made into one. Therefore, should
one circuit malfunction, the whole unit must be replaced.

• The adjustments for the IF (RF AGC) circuit of the 3 in 1

tuner are described below.

The 3 in tuner dose not need any adjustments,

because precise adjustments were down before
shipment.

Monitor TV

3 in 1 Tuner

Rear Panel

3 in 1 Tuner

CP-1 PWB
Assembly

VR  RF AGC

1. Connect the monitor TV to the VHF/UHF antenna

output terminal.

2. Connect the VHF or UHF antenna to the VHF/UHF

antenna input terminal.

3. Receive the middle electrical field (70 dB

µ

 ~90 dB

µ

) of

the VHF or UHF channel, and slowly turn the VR (RF
AGC) from the point where snow-noise is present to the
point where it just disappears from the monitor TV.

4. Confirm by monitor TV that there is no beat and

saturation (S/N is best point) when receiving any TV
channel.

 Picture of

  Monitor TV

E-E mode

 monitor TV

VR (RF AGC)

S/N is best point

 (on the 3 in 1 tuner)

Test points TP182 (ENV) and TP183 (SW-P) for tape path adjustment are shown in figure below.

VP-1 PWB Assembly

TP182
(ENV.)

TP183
(SW-P)

#1

#1

#2

#3

#3

#3

#3

#3

not supplied

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

–––––––

–––––––

––––––––––

–––––––

–––––––

–––––––

––––––––––

––––––

1      

◊

A-6780-516-A CABINET ASSY, FRONT (L44AR)

1      

◊

A-6780-570-A CABINET ASSY, FRONT (L66HFAR)

2

A-6780-568-A BUTTON ASSY BOARD, COMPLETE

3

3-942-768-02 EMBLEM (NO.5), SONY

4

3-965-446-01 SCREW, SPECIAL

* 5      

◊

A-6796-611-A CP-A BOARD, COMPLETE (L66HFAR)

* 5      

◊

A-6796-619-A CP-A BOARD, COMPLETE (L44AR)

6

1-693-379-11 TUNER (RF/TU/IF)

* 7      

◊

A-6796-616-A VP-1 BOARD, COMPLETE (L66HFAR)

* 7      

◊

A-6796-622-A VP-1 BOARD, COMPLETE (L44AR)

8

3-976-269-01 BRACKET, TERMINAL (L66HFAR)

* 8

3-970-792-01 BRACKET, TERMINAL (L44AR)

9

3-740-382-01 +BTS-B S 4X12

* 10

3-976-260-01 COVER, TOP

11

3-963-641-01 HOLDER (AC INLET)

* 12

3-963-642-01 TOP HOLDER COVER

13

A-6780-569-A COVER, BOTTOM

14

3-942-661-01 STAND, FELT

* 15      

◊

A-6796-610-A TM-2 BOARD, COMPLETE

16

3-974-743-01 BUTTON 2P (POWER EJECT)

17

3-947-433-01 WINDOW

18      

◊

3-977-262-01 DOOR, CASSETTE (L44AR)

18      

◊

3-977-979-01 DOOR, CASSETTE (L66HFAR)

19      

◊

A-6796-609-A TM-1 BOARD, COMPLETE (L66HFAR)

* 19      

◊

A-6796-618-A TM-1 BOARD, COMPLETE (L44AR)

20

3-960-936-01 SPRING

21

3-974-744-01 BUTTON (PAUSE)

22

3-974-745-01 BUTTON (REC)

23

1-475-168-11 COMMANDER, STANDARD(RMT-V198L)(L44AR)

24

3-709-128-01 COVER, BATTERY (L44AR)

25

1-475-169-21 COMMANDER, STANDARD(RMT-V213A)(L66HFAR)

26

3-709-044-01 COVER, BATTERY (L66HFAR)

r

Items marked “ * ”are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.

r

The mechanical parts with no reference number
in the exploded views are not supplied.

r

Hardware (# mark) list and accessories and pack-
ing materials are given in the last of this parts
list.

NOTE :

r

-XX,  -X mean standardized parts, so they may
have some difference from the original one.

r

The construction parts of an assembled part are
indicated with a collation number in the remark
column.

r

The parts marked with a 

◊

 are special parts for

Argentina and are supplied by SONY ARGEN-
TINA.

#4

#4

#4

#4

not supplied

not 

supplied