JVC RC656L SERVICE MANUAL

Page 1

SERVICE MANUAL

MODEL RC-656L/LB LW-MW-SW-FM 4-BAND STEREO RADIO CASSETTE RECORDER

No. 1422 August 1980

Page 2

Page
Specifications
Features
Names of Parts
Removal of Main Parts
Removal of Cassette Mecha Parts
Adjustment of Cassette Recorder
How to Engage Dial Cord
Adjustment of Cassette Recorder Amplifier
Tuner Alignment
Block Diagrams
Schematic Diagram (Tuner Circuit)
Schematic Diagram (Amplifier Circuit)14
Wiring Connection

raye
Mechanical Component Parts
Mechanical Component Parts List
Assembly Parts
Assembly Parts List
Amplifier P.W. Board Parts
Amplifier P.W. Board Parts List
Tuner P.W. Board Parts (Power Supply, Motor) 25
Tuner P.W. Board Parts List
Power Supply P.W. Board Parts List
Packing
Packing Material Parts List
Accessories

D -----

Specifications

Semiconductors	: 9 ICs (including 2 for the micro- phone and 1 for the motor)	Rewind time Fast forward time	: Within 110 sec. (C-60 cassette) : Within 110 sec. (C-60 cassette)
Speakers	33 (ransistors & 1 FE1 : 16 cm (3. 2 Ω) × 2, 5 cm (4 Ω) × 2	Amplifier section Power output Input jacks	: Max. 12 W (6 W + 6 W) at 3.2 Ω : Mic x 2
Tuner section			(0.8 mV, low impedance)
Frequency ranges	: FM 88 – 108 MHz SW 6 – 18 MHz MW 540 – 1600 kHz	Output jacks	: Ext. speaker x 2 (load impedance 4 — 8 Ω) Headphones x 1
	LW 150 – 350 kHz	Input/output jack	: DIN jack
Antennas	: Telescopic antenna for SW & FM Ferrite core antenna for MW & LW	Power supply	: DC 12 V (8 "R20 (U2)" batteries) Car battery (DC 12 V)
Tape recorder section		Power consumption
Track system Frequency response	Frack system : 4-Track 2-channel stereo Frequency response : 30 – 15,000 Hz (with chrome tape) 30 – 14,000 Hz		: 19 W : 468(W) x 247(H) x 125 (D) mm : 5.2 kg (without batteries) 5.9 kg (with batteries)
Wow & flutter S/N ratio	(with normal tape) : 0.12% (WRMS) : 50 dB, The S/N ratio is improved by 5	Design and specificatior	ns subject to change without notice.

dB at 1 kHz and 10 dB at 5 kHz or above with DOLBY N.R.

switch ON.

Page 3

Features

Dolby * NR circuit incorporated for noise-free recording and playback.
Biphonic * Processor for reproducing three-dimensional Biphonic sound field from binaural recordings and for giving wide stereo effect to ordinary stereo recordings.
Five-LED Multi Peak Indicator for allowing accurate recording level control in order to make more elaborate "professional-touch" recordings.
Manual/Automatic switchable recording level control system.
2-Way/4- speaker system consisting of two 16-cm (6-1-2") woofers and two 5-cm (2") tweeters.
High-performance tuner realized by incorporation of a quadrature detector and a PLL IC multiplexer circuit.
One-button recording ease press only the record but-

ton to start recording

Auto-stop at the tape end in the record and play modes.
Pause button to stop the tape temporarily in the record or play mode.
Fine tuning for clearer short-wave reception.
External speaker terminals provided.
DIN jack provided.
Three-way power supply flexibility; AC, 8 "R20" batteries or car battery.
* Noise Reduction system made under licence from Dolby Laboratories. "DOLBY" and the double-D symbol are trademarks of Dolby Laboratories.
* BIPHONIC is a trademark of JVC.

Names of Parts

Page 4

Removal of Main Parts

1. Rear Cabinet
(1) Remove 7 screws ( ① ~ ③ )
- , ❷ = SDSP3012 ●~⑧ = VKZ4008-001
(2) Remove 2 connectors (3 pin) connected to the rod antennas and power supply wires.

Fig. 2

3 Tuner P.W. Board Ass'v
(1) Remove the rear cabinet.
(2) Remove Tuning knob and Fine tuning knob.
(3) Remove 5 screws (SBSF3010V)
(4) Remove 2 connectors (3 pin and 5 pin).

Fig. 4

2. Amplifier P.W. Board Ass'v

(1) Remove the rear cabinet.
(2) Remove 4 control knobs (VOLUME, BASS, TREBLE and REC VOLUME)
(3) Remove 6 screws ( () ~ () = SDSP3034V
- 0 = SDSP3005V
(4) Remove the 3 pin connector connected to the E MIC wire terminal P.W.B.

Fig. 3

- 4 -

4. Cassette Mechanism Remove 4 screws ( <a> </a> ( <a> </a> (a) fastening the cassette mechanism.

Fig. 5

Page 5

Removal of Cassette Mecha Parts

1. Pinch roller ( ① )
Remove the spring (2).
Remove the E-ring ( 3).
2. REC/PB head ( 4)
Remove 2 screws ( 6 , 6 ).
Remove the solenoid head circuit board.
3. Erase head ( 1 )
Remove 2 screws ( 8).
4. Reel assembly ( ( )
Insert the special tool for reel removing to reel 3 groove, and then pull out the reel.
5. Take-up roller ( 🌒 )
- Push the FF button.
- Remove the washer. If you broke the washer, you can use E-ring (REE 1200).
6. RF clutch assembly ( 🕑 )
Remove the main belt ( 1 ).
Pull out the pulley (it is pressed).
7. Main belt ( 🚯 )
To flywheel bracket ( 1) remove a screw ( 1) ).

8. Flywheel assembly ( 10)

Do the same manner as for the main belt. (When assembling it, be careful not to forget the nylon washer for capstan.)

9. Reef switch ( 🛈 )
Remvoe the screw ( 1).
10. Motor assembly ( ^(D))
- Remove 3 screws ( 1 ).

Fig. 8

- 5 -

Page 6

Adjustment of Cassette Recorder

If the following adjustments are performed by ear or eye in a simple manner, be sure to perform then again later.

Head replacement and angle adjustment

1. Head replacement
- 1) To replace the record/playback head, remove two screws (A) and (B) shown in Fig. 9.
- 2) To replace the erase head, remove two screws C and D shown in Fig. 9.
- 3) When pressing the playback button, adjust these heads with the screws and the adjustment hole so that they are located as shown in Fig. 9.

Fig. 9

2. Angle adjustment of Record/Playback head
- Connect an oscilloscope to the speaker terminal. (A Lissajous waveform will appear.)
- Play back the head angle adjusting tape (JVC test tape VTT-657).
- Adjust the head angle by turning screw B shown in Fig. 9 so that the phase difference between the L and R outputs is 0° and the outputs are maximum.
- 4) After adjustment, be sure to paint-lock screw (B).
- 5) When adjusting the head angle using neither a voltmeter nor test tape, adjust it so that the output (esp. high band) from the speaker is maximum.

Fig. 10

Check of auto-stop detection pressure
- Place the head mechanism with its motor side down, then set the recorder into the playback mode.
- Hang a tension gauge on the detection cap tip as shown in Fig. 10, then confirm that when this gauge is slowly pulled, the auto-stop lever operates in the range of 50-70 g.

Flywheel thrust adjustment

Insert a clearance gauge into the clearance between the flywheel and the flywheel bracket, then adjust the thrust by turning the thrust screw shown in Fig. 11 to obtain a clearance of 0.1–0.3 mm wide.

Pause operation check

Operation and timing check

Confirm that when pressing the PAUSE button in the playback mode, the tape stops running, while when re-pressing, the recorder returns to the playback mode without any abnormality.
2) Confirm that when slowly pressing the PAUSE button, the pinch roller separates from the capstan to stop rotating earlier than the reel disk which in turn stops rotating. (Although they may stop almost at the same time, this means no abnormality.)
- Note: For positive checking, it is advisable to use a cassette tape with a small number of turns such as C-30, etc.

Adjustment of pinch roller contact force

Position the mechanism shown in Fig. 12 with the motor side down, enter the recorder into the playback mode, and hang a tension gauge on the protrusion part of the pinch roller arm shown in Fig. 12. Next, confirm that when slowly pulling the tension gauge, the pinch roller stops rotating in the range of 450-550 g.
If the pinch roller does not stop in the range, replace the contact spring or adjust the contact force by bending this spring.
- Note: Overly strong contact force may cause noise in the pinch roller bearing part, wow & flutter, or similar adverse effects. Conversely, too little contact force may cause auto-stop function failure, wow & flutter, or similar adverse effects.

Fig. 12

Page 7

Playback torque adjustment
- Set a torque gauge to the take-up reel, then enter the recorder into the playback mode, and confirm that the playback torque is 45–70 g/cm.

Fig. 13

2) When the playback torque is not in this range, check whether or not rubber and/or rotary members have dirt and/or oil on them. After that, if the torque is still low, lift up the spring plate shown in Fig. 13 to move it to position (3), while if the torque is high, move it to position (1) in the same manner.

Fast forward/rewind torque adjustment

1. Fast forward torque adjustment (Fig. 14)
- Set a torque gauge to the take-up reel, then enter the recorder into the playback mode, and confirm that the fast forward torque is 60–130 g/cm.
- When a normal torque is not obtained because of the instability of the sliding mechanism within the R.F. clutch ass'y, lift up the spring plate inside the R.F. clutch ass'y and adjust the torque by moving it in the direction of (1).
- 2) When a normal torque is not obtained should the said sliding mechanism operate normally, adjust the torque by moving the said spring plate in the direction of (4) in the same manner as item 1).
2. Rewind torque adjustment (Fig. 14)

Set a torque gauge to the rewind reel, then enter the recorder into the rewind mode, and confirm that the rewind torque is 60–130 g/cm.

When a normal torque is not obtained because of the instability of the sliding mechanism within the R.F. clutch ass'y, lift up the spring plate inside the R.F. clutch ass'y and adjust the torque by moving it in the direction of ①.

2) When a normal torque is not obtained should the said sliding mechanism operate normally, adjust the torque by moving the said spring plate in the direction of (4) in the same manner as item 1) of this paragraph.
- Note: When rubber members (belt, idler), the fringe of the flywheel, etc. have dirt on them, a normal torque may not appear, so clean them with alcohol, etc.

Fig. 14

How to Engage Dial Cord

1. Turn the dial drum fully counterclockwise (to the lowest frequency).
2. Use tetron cord (995mm long and 0.5mm in diameter)
3. Install the string in the sequence of the numbers.

Fig. 15

Page 8

Adjustment of Cassette Recorder Amplifier

Adjustment location

Fig. 16


Step	ltem	Input	Output	Adjusting point	Standard value	Tape select switch	Dolby NR switch	Rec-Play	Beat cut switch	Remarks
1	Head azimuth	Test tape VTT-653,658 (10kHz)	T302, T402 T502	Head	The phase difference between the L and R outputs is 0° and maximize the output level at the same time.	Normal	OFF	Play	_	Before playback level adjust- ment, L and R channel out- put levels become unbalance.
2	Playback level	Test tape VTT-664	same as above	VR301,401	410m∨	Normal	OFF (ON)	Play	_	Check the playback level so that difference between ON and OFF with Dolby NR switch is less than ±1dB
3	LED indicators	Apply 1kHz -4c DIN socket. (L aoplied indepen Adjust VR305 s output level bec with R channel.	dBs signal to the or R channel is dent signal.) to that TP302 ome 410mV	VR305,405	Check to light LED at 0d8 level and to un-light the LED at -1d8 level down.	Normal	ON (OFF)	Rec	_	Check Test Point 302, 402 levels become less than ±1dB at Dolby SW on.
	Recording no	rmal same as	TP301, TP401	VR304,404	35μA (0.35mV/10Ω)	Normal	0.57			Unsolder the bias cutting
4	Current	·O2 above	T501	VR303,403	70µA (0.7mV/10s2)	CrO2		Rec	-	pattern.
5	Bias frequency	-	same as above	L502	63.5±0.1kHz	Normai	OFF	Rec	"1"	If the frequency is low, cut C409 and C408 Turn VR304,406 center.
6	Bias current	-	same as above	ame as above VR306,406 320μF ( 3.2mV ) Normal OF		OFF	Rec	"1"	For this adjustment, Bias frequency not become standard value
7	Stereo signal trap	Apply 19kHz, OdB signal to the DIN socket VR302=Max.	TP302, TP402 TP502	L303,403	min.	Normal	ON	Rec	—	After this adjustment, check the level so that 1kHz ~ 19kHz frequency become 30dB or more.
8	Bias trap	Apply 1kHz - less than-100 dBs signal to the DIN socket VR302=Max.	same as above	L302,402	Less than 0.5dB with the beat cut switch selection	CrO2	ON	Rec	"1~3"
9	Rec/Play frequency response (Normal)	Apply -40dBs signal to the DIN socket	same as above	VR306,406	(At reference frequency; 1kHz 10kHz; 0±1dB)	Norma!	OFF (ON)	Rec (Play)	''1'' (Normal)	Check the Rec/PB frequency responce become standard value at Dolby NR circuit ON.
10	Rec/Płay leve! (Normal)	Apply -4dBs signal to the DIN socket. Adjust VR302 so that TP202 output level become 410mV	same as above	VR304,404	The output difference level become less than ±1dB.	Normal	OFF	Rec (Play)	''1'' (Normal)
11	Rec/play level (CrO2)	same as above	same as above	VR303.403	same as above	CrO2	OFF	Rec (Play)	"1" (Normal)

Page 9

Tuner Alignment

BASIC CONDITIONS
POWER SOURCE OF THE RECEIVER	DC 12 V, AC240/220/110 V, 50/60 Hz.
LOAD RESISTANCE OF THE RECEIVER	50 mW (0.4 V)/3.2 Ω.
MODULATION OF SSG	400 Hz. 30%

Item	Description
1. MW IF ALIGNMENT
1-1 Conditions of the receiver. (1) Power source:	DC 12 V. (When the power is supplied directly to the tuner in the receiver, the voltage should be adjusted to the proper level which shall be requir- ed by the tuner.)
(2) Function switch position: (3) Band select switch: (4) Volume control: (5) Tone control: (6) Variable capacitor: 1-2 Connection of Sweeper and the receiver (1) Tuner input: (2) Tuner output:	RADIO MW Minimum gain position Center (Bass, Treble) position Near the minimum capacity position where no signal come in. Positive side to TP-7. Positive side to TP-5. Negative side to TP-2.
1-3 Aligning position: 1-4 Alignment (Waveform): Fig. 17	CFT1, IFT3 Adjust MW I.F.T. (above mentioned aligning position) so that max- imum and symmetrical wave form can be obtained. In this case, the wavehead should be appeared at the center marker (455 kHz) on the scope of Sweeper.
2. FM IF ALIGNMENT
2-1 Conditions of the receiver (1) Power source: (2) Function switch position: (3) Band select switch: (4) Volume control: (5) Tone control: (6) Variable capacitor:	Same as mentioned in item 1-1 RADIO FM Minimum gain position Center (Bass, Treble) position Near the minimum capacity position where no signal come in.
2-2 Connection of Sweeper and the receiver (1) Tuner input: (2) Tuner output:	Positive side to TP-1. Positive side to TP-3. Negative side to TP-2.
NOTE a) Attach a capacitor (30 pF) and a resistor (30 input. b) Attach a capacitor (30 pF) and a resistor (10 output.	) kΩ) in series to the positive side cable which shall be led from Sweeper 00 kΩ) in series to the positive side cable which shall be led from Sweeper
2-3 Aligning position:	a) IF Waveform: IFT1 b) Discriminate Waveform: IFT2 ("S" curve waveform)

Page 10

	ltem	Description
2-5 a)	Alignment (Waveform): IF Waveform:	Adjust the discriminate coil (IFT2) so that "S" curve waveform may be changed to IF waveform as shown in following figure.
b)	Discriminate Waveform:	Fig. 18 Fig. 18 After above, adjust IFT1 so that max. sensitivity and symmetrical IF waveform can be obtained on the scope of Sweeper. Adjust the discriminate LFT2 again so that above symmetrical IF waveform may be changed to balanced "S" curve waveform.
3. M	W RF ALIGNMENT
3-1	Conditions of the receiver.
(1)	Power source:	Same as mentioned in item 1-1
(2)	Function switch position:	RADIO
(3)	Volume control:	50 mW
(4)	Variable capacitor:	Center (Bass, Treble) position Befer the following list shown in item 3.4
		Here, the following hat anown in item 5-4.
3-2 (1)	Conditions of 55G.	Befer the basic condition
(2)	Frequency:	Refer the following list shown in item 3-4
(3)	Output level of the attenuator in SSG:	Approx. 50mW
3-3	Power output measuring position:	Speaker terminals

3-4 Alignment:

	Band Select Switch Position	Sort of Antenna to be attached to SSG	Frequency of SSC	Variable Capacitor Position	Aligning Position
1			145 kHz	Max. capacity	L8
2			360 kHz	Min. capacity	TC3-1
3	IW	Loon Antenna	Adjust the above aligning	position (L8 & TC3-1) repeated	lly so that the tuner
		Loop / internit	can be received above freq	uency range (band width).
4			160 kHz	to be received 160 kHz	L4
5			350 kHz	to be received 350 kHz	TC1-3
6			Adjust the above aligning	position (L4 & TC1-3) repeated	lly so that the tuner
			can be obtained the best s	ensitivity.
7			520 kHz	Max. capacity	L9
8			1,650 kHz	Min. capacity	TC3-2
9	MW	Loon Antenna	Adjust the above aligning position (L9 & TC3-2) repeatedly so th can be received above frequency range (band width).		lly so that the tuner
		Loop / intoiniu
10			620 kHz	to be received 620 kHz	L6
11			1,400 kHz	to be received 1,400 kHz	TC2-2
12			Adjust the above aligning	position (L6 & TC2-2) repeated	lly so that the tuner
			can be obtained the best s	ensitivity.
13			5.8 MHz	Max. capacity	L10
14			18.6 MHz	Min. capacity	TC1-4
15	SW	Dummy	Adjust the above aligning	position (L10 & TC1-4) repeate	edly so that the
		Antenna	tuner can be received abov	e frequency range (band width	).
16			6.0 MHz	to be received 6 MHz	L7
17			18.0 MHz	to be received 18.0 MHz	TC2-1
18			Adjust the above aligning can be obtained the best set	position (L7 & TC2-1) repeated ensitivity.	lly so that the tuner

Page 11


	Item	Description
4. F	M RF ALIGNMENT
4-1	Conditions of the receiver	Same as mentioned in item 1.1
(2)	Function switch position:	RADIO
(3)	Band select switch: Volume control:	FM 50 mW
(5)		Center (Bass, Treble) position
(0) 4-2	Variable capacitor:	Refer the following list shown in item 4-3
(1)	Modulation:	Refer the basic condition
(2)	Frequency: Output level of the attenuator in FM SSG	Refer the following list shown in item 4-3. The level shall be decided by the load registance of the receiver
		mentioned in the basic conditions.

4-3 Alignment:

	Band Select Switch Position	Antenna to be attached to FM SSG	Frequency of FM SSG	Variable Capacitor Position	Aligning Position
1			87.5 MHz	Max. capacity	L5
2			109.0 MHz	Min. capacity	TC1-1
3	FM	FM Dummy Adjust the above aligning position (L5 & Antenna Can be received above frequency range (b)		position (L5 & TC1-1) repeated uency range (band width)	lly so that the tuner
4			90 MHz	to be received 90 MHz	L1
5			106 MHz	to be received 106 MHz	TC1-1
6			Adjust the above aligning position (L1 & TC1-1) repeatedly so can be obtained the best sensitivity
7	Pilot Signal Alignment	Input 60 d Adjust the	B MONO Signal Freq. 98 MH VR1, so that output frequency	z y of TP6 may be obtained 19 k	Hz.
8	Stereo Separa- tion Alignment	Input 60 d Adjust the (Separation	Input 60 dB STEREO Signal Freq. 98 MHz 1 kHz 100% Adjust the VR2, so that leakage level of CN2P (L or R) may be obtained minimum level. (Separation: more than 25 dB)
9	Stereo Tuning LED checking	When adjustin check the LEE	When adjusting stereo separation, check the LED lit with function switch at stereo mode and check the LED unlit at mono mode.

(A) Parts Location on Tuner P.C.B.

(B) Dummy Antenna

Note; FM ant. CN3P is 300Ω balanced output. If when connecting 50Ω or 75Ω unbalanced SSG, need match its impedance.

Fig. 19

Page 12

Block Diagrams

Page 13

Schematic Diagram of RC-656L/LB (Tuner Circuit)

Page 14

BC-6561 /I P

Page 15

Wiring Connection

Page 16

RC-656L/LB

Mechanical Component Parts

Fig. 26

Page 17

Mechanical Component Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
1	14310182ZT	Mecha Chassis Ass'y		1
2	13970201T	Rec. Safety Lever		\| 1
3	2980802T	Spring		\| 1
4	14310291ZT	Rec. Safety Spoke Ass'y		\| 1
5	180502BT	Rec. Slide Lever Spring		1
6	14310201T	Rec. Slide Lever		1
7	13971002T	Play Slide Lever		\| 1
8	090302T	Play Slide Lever Collar		\| 1
9	13490301T	RC Spring		1
10	12001001T	Main Plate		1
11	7380702T	Main Plate Spring		1
12		Tube	φ3.5 x 18	2
13	14311004T	Rewind Arm
14	12000891ZT	FF. Idler Arm Ass'y
15	6300403T	FF. Idler Arm Spring		1
16	13371901T	RC Lever
\| 17	14311901T	RC Slide Lever	6 50 91
18	580702⊤	Spring	for RC Side
19	13970205T	Record Lever
20	14310203T	Record Bracket
21	14310202T	Record Spring Plate
22	14310792ZT	R. F. Clutch Ass'y
23	14631010T	Rew. Spring Plate
24	12000709T	R. F. Clutch Arm Spring
25	12001102T	Auto Stop Lever
26	14310901
27	1200090321	Flywheel Ass'y
28	40811201	Nylon Wasner		1
29	120009041
30	12000901 15700001T	Flywheel Bracket		1 1
31	15/909011 140717917T	Auto Stop Lever Spring Bausa Slide Lever Ass'v		1
32	140/1/01Z1	Collar	or BEE2500 (E Bing)	1
24	101012011 100012011	Pause Lever	of 11222000 (2 1	1
34	13231701T	Pause Lever Spring		1
36	12601501T	Special Washer	Nylon φ1.7 x φ5 x t0.4	1
37	180502BT	Spring	for Pause Slide Lever	1
38	180311T	"	for Pause Arm	1
39	MSW-0087NKT	Leaf Switch		1
40	13971201T	Motor Bracket		1
41	14311296ZT	Motor Ass'y		1
42	F4641-001	Rubber Cushion		3
43	14311202T	Collar		3
44	12600301T	Head Panel		\| 1
45	12000302T	Head Block		1
46	VGH0421-001	R/P Head
47	15600305T	R/P Head Spring		1
48	VGH0212-101	E. Head
49	12001193ZT	Detect Plate Ass'y		1
50	14000303T	Head Panel Spring (L)		1
51	12000303T	" (R)
52		Tube	φ1.4 x φυ.8 x L24
53	14311701T	Pause Arm Lever
54	4080411T	Head Panel Collar
55	12600491ZT	Pinch Holler Ass'y
56	12600402T	Take up Bast Ass's
57	1200059121	Take-up neel Ass y
58	139/069121	Supply neel Ass y	for Back Tension	1
59				1
60	VIC5127-0025			1

Ref. No.	Parts No.	Parts Name		Remarks		Q'ty
61	14311801T	Counter Bracket				1
62	3091001T	Counter Belt				1
63	6010101T	Pack Spring				1
64	14311494	Push Button Switch Compo	osite			1
01		Ass'v
65	139714927T	Push Button Switch Ass'v				1
66	VXP3054-001	Push Button				1
67		"	PA	USE PLAY		1
68	″ -003	"	\| FF			1
69	··· -004		RE	W		1
70	″ -005		ST	OP/EJECT		1
71			RE	С		1
72	14311001T	Slide Bracket (A)				1
73	14311002T	" (B)				1
74	14311382ZT	Eject Bracket Ass'y				1
75	13971302T ^°	Eject Lever				1
76	581205T	Spring				2
77	4080411T	Collar				1
78	9071904T	"				1
82	4660901T	Cord Clamp				1
83	12000891ZT	FF Idler Arm Sub Ass'y				1
84	12000802T	Idler Gear				1
85	12000804T	Take-up Roller				1
86	12001503T	Washer				2
87	12000906T	Spacer				1
88	13971005T	Guide Plate				1
89	15790103T	Rubber Sheet				1
90	RDS3000F	CS Ring				1
101	REE2500	E Ring				4
102	REE4000	"				1
104	WNS3000Z	Washer				1
105	WSS2000Z					1
106	14311203T	"				3
107	13270412AT	U Washer				2
108	13270412BT		ret	er to Note		2
109	13270412CT		)			2
110	LPSP2605Z	Ass'y Screw				3
111	SPSP2609Z	Screw				3
112	SPSP2618Z					1
113	SPSX2011R	PIVI Screw				1
114	555P3005Z5					2
115	10PZ20051		for	Counter Bracket	· v 2	11
110	2082200401	Tap Screw	Par	Counter Bracker		B: D
			Sid	le Bracket (Δ) v '	2
			Sid	le Bracket (R) x 3
			Fie	et Bracket v 1	-
			Mo	tor Bracket x 2
117	20P726050T	,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,				2
112	20P726060T					1
110	20PZ26070T					2
120	20PZ26080T					1
121	23P726050T	"	for	Leaf Switch x 1		1
122	72P720110T	Cap Screw				1
123	72PZ20120T	"				2
	, 21 2201201
Note:			Parts No.	Thickness	Mat	erial
The U-washe	ers are provided for adju	isting the height of erase head.	13270/12AT	0.1 mm	Phoenbo	n-hronze
They may no	ot be used, if the head h	eight is normal value.	13270412RT	0.2 mm	Rr	ass
Choose one	of three types (thicknes	a it	13270412CT	0.3 mm	Alum	inium

the size of erase head when replacing it.

Page 18

Assembly Parts List

Re	ef. No.	Parts No.	Parts Name	Q'ty	Ref. No.	Parts No.	Parts Name	Q'ty
1~9,	,13,21,22	ZCRC656L-CBF	Front Cabinet Ass'y	1 set	5	VJK3159-001	Dial Scale (A)	1
	1	VJC1120-001	Front Cabinet	1	6	VJK3160-001	Dial Scale (B)	1
	2	VJD4005-002	Reflection Plate	1	7	VJK3161-001	Dial Lens	1
	3	VJD4412-001	Button Plate	1	8	VJK4123-001	Scale Plate (A)	1
	4	VJD4413-001	Fitting	1	9	VJD4414-001	Mic Escutcheon	2

Page 19

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
10	VYH4102-001	Mic Bushing		2
11	VMME62N-D23	E. C. Mic
12	VYH4298-001	Holder		2
13	QXM2251-003	Mark		1
14	VMW1017-001D	P. W. Board	for Mic	1
15	OMV5005-003	Connector
16	EAS5PH08SA	Speaker	SPK302
17	VYH4565-001	Tweeter Holder	51 1(302
18	OEN21EM-155		C380 480
19	VKY4165-001	Door Spring	0000,400
20	VYH4352-002	Clamp	for Tweeter
21	V44981-001	Earth Catcher	IOI I Weelei
22	VYH4389-001	"
23	VKZ4001-007	Wire Holder
24	EAS16P127SG	Speaker	SPK 301
			SPK401	2
25	VYH2122-001	Chassis Base
26	VYH4032-001	Boller
27	VYH4002-001	"
28	RTA4020	Rivet		1
29	V42562-1	Special Washer
30	BTA4010	Bivet
31	V41336-021	Tuning Shaft
32	V.IK4124-001	Scale Plate (B)
33	VYH3177.001	Dial Drum
34	BCSA6000	C Bing		1
35	VHR2TT9-05A	Dial Bone	905 m/m	1t
36	50153-3	Spring	333 1011	1 1
37	V.IN4049-00A
38	FAS5PH08SA	Speaker	SPK BA02	1
39	VYH4352-002	Clamp	for Tweeter	1
40	VMW1017-001C	P. W. Board	for Tuper LED
41	SLP146B	LED	D201 202	2
42	QRD147J-471S	C. Resistor	B201	1
43	QRD147J-101S	"	B202	1
44	VJH3005-00N	Handle Ass'v
45	VYH3120-001	Handle Supporter		2
46	V44943-001	Washer (L)		1
47	V44944-001	" (R)		1
48	VYH4224-001	Bracket		i
49	VYH4566-001	Bracket		1
50	VYH4571-00A	Dump Ass'y
51	VYH4578-001	Connect Bracket	for Front Cabinet
			~ Rear Cabinet
52	VYH2124-001	Tuner Chassis
53	VXQ3018-004	Toggle Lever	for Band
54	QAT5001-203	M. V. Capacitor	VC2
55	VYH4516-001	Fine Tuning Bracket
56	VYH4221-001	Arm
57	T41572-001	Inductor	L701, 702	2
58	QET41CR-227	E. Capacitor	C702
59	VMW3035-301	P. W. Board	for R/P Head	1
60	VMW3113-001	P. W. Board	for Motor
61	VYH2125-001	Holder
62	VYH4567-001	Earth Plate		1 1
63	VXQ3028-002	Toggle Lever		2
64	VXQ3032-001	"		1
65	VXQ3033-001	"		1 1
66	VJD3193-002	Jack Board

Page 20

Ref. No.	Parts No.	Parts N	ame	Remarks	Qʻty
67,73,75	ZCRC656L-CBR	Rear Cabinet Ass'y			1 set
76,82,		···· · · ··· ,
67	VJC1121-001	Rear Cabinet			1
68	QZR4147-001U	Rod Antenna			2
69	VYH4189-001	Holder (B)			2
70	VYH4010-002	Battery Contact			2 _
71	53738-009	Spring			1
72	V44686-002	Spring			1
73	VYH4568-00A	Shield Ass'y			1
74	VND4027-001	Dolby Label			1
75	VYN5066-001CBS	Name Plate		RC-656LB	1
	VYN5066-002C	"		RC-6561	1
76	V41583-3	Таре			1
77	VYSA1R4-050	Spacer			2
78	VJT4029-00A	Cassette Door Ass	Ϋ́Υ		1
79	V44910-002	Cassette Spring			2
80,81	ZCRC656L-BCA	Battery Cover Ass	′ у		1 set
80	VJC2016-004	Battery Cover			1
81	VYSH106-020	Spacer			1
82	VYSA1R6-009				4
83	VXKM520-20013	Knob			1
84	VXL4008-002	Tuning Knob			1
85	VXL4122-002	Knob			3
86	VXL4123-002	,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,			1
8/	53866-2	Label
88	VTP54N2-12ES	Power Transforme	r	RC-656LB
	V1P54N2-12E	Turne Duralist		RC-050L
89	VY4570-001			Chassis hasa
				Chassis base B W B ~ Macha	1
102					2
103	00023	Tapping Screw	E C Mic Hold	er v 2 Woofer v 8	21
104	303530002	Tapping Screw	Mic Wire termin	alx1 LEDPWBx1	21
			Tweeter x 2	Connect Bracket x 2
			Earth Catcher X	< 1 Holder (B) x 4
105	CDCE20107		Tweeter Holder	Dump Ass'v x 2	17
105	303730102		~ Front Cabi	net x 2 Tuner chassis
			Door Spring x 1	~ P.W.B. x 2
				Fine Tuning Bracket x 1
			Front cabinet	x 5 Holder ~ P.W.B. x 2
			*********	Jack Board ~ P.W.B. x 2
106	SBSF3012C	"	·	Tuner CB ~	8
				Front Cabinet x 3
				Arm Ass'y ~ Front Cabinet x 5
107	SBSF3020R	"		Front Cabinet	6
				~ Rear Cabinet
108	SBSF4020C	"		Trans Bracket	2
109	SDSP3010RS	Screw		Front Cabinet	6
_				~ Rear Cabinet x 2
				Bracket x 4
110	SPSP3006VS	"		P. W. B ~ Mecha	2
111	SPSP3012VS	"		"	1
112	SPSP3014ZS			Bracket	2
113	SPSP3035VS	"		P. W. B ~ Mecha	1
114	SSSP2610Z	Tapping Screw		for Arm	1
115	SDSP3010RS	Screw		Front Cabinet	2
				~ Rear Cabinet
L					·

Page 21

Fig.	27

Amplifier P.W. Board Parts

			E	с	в				Е	с	в
X301,401	2SC1335	Pre Amp.	0.3	1.7	0.9	X309,409	2SC945L	Biphonic	2.3	7.4	2.9
X302,402	2SC1335	Pre Amp.	1.1	7.3	1.7	X501	2SD468	Ripple Filter	2.9	11.7	3.5
X303,403	2SC1335	Tuner Amp.	2.2	4.7	2.8	X502	2SD468	Ripple Filter	10.2	11.5	11.0
X306,406	2SC945L	Rec Amp.	0.4	3.0	1.0	X503	2SD468	Regulator	8.3	11.9	8.7
X307,407	2SC945L	DIN Amp.	0.5	4.0	1.1	X504	2SD468	Bias OSC	0.1	4.3	0.7
X308,408	2SC945L	Amp.	2.1	4.3	2.7

RC-656L/LB

Page 22

Amplifier P.W. Board Parts

Fig. 27

			E	С	В				E	с	в
X301,401	2SC1335	Pre Amp.	0.3	1.7	0.9	X309,409	2SC945L	Biphonic	2.3	7.4	2.9
X302,402	2SC1335	Pre Amp.	1.1	7.3	1.7	X501	2SD468	Ripple Filter	2.9	11.7	3.5
X303,403	2SC1335	Tuner Amp.	2.2	4.7	2.8	X502	2SD468	Ripple Filter	10.2	11.5	11.0
X306,406	2SC945L	Rec Amp.	0.4	3.0	1.0	X503	2SD468	Regulator	8.3	11.9	8.7
X307,407	2SC945L	DIN Amp.	0.5	4.0	1.1	X504	2SD468	Bias OSC	0.1	4.3	0.7
X308,408	2SC945L	Amp.	2.1	4.3	2.7			1

Page 23

Amp. P.W. Board Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
	VMW1017-001A	P. W. Board	for Amp
	VMW1017-001B	"	for LED
S501-19	QSS9201-002	Slide Switch		1
S502-118	QSSJ201-001	"		1
S503-16	QSS6201-102	"		2
S504-16				-
$505-14	OSS4301-023			1
$506	OSS1301-001	,,
$507-14	OSP4210-061	Push Switch		1
1301 401	OMS3501-014	Socket		2
1302 402	OMC0289-003	DIN SPK Socket		2
1501	OMC9014-006	DIN Socket
1502	OMS6312-004	Headphone lack
1503	OMA1221-004	Ext Batt look		1
VB301 401 303	OV/P8A0B-024
	Q VI 0A0D-024	v. nesistor		D
VR302 402	01/08434 0541/M
VR305 405
VR305,405	" 015			2
VR300, 400				2
	QVD/A3B-115VW			2
308, 408	01/09424 0241/14
VR309, 409
				2
	AN7146 (H)			1

	25C1335 (D)	Iransistor		6
402, 303, 403
X 304, 404, 305	2SC945L (Q,P)	Iransistor		12
405, 306, 406
307, 407, 308
408, 309, 409
X501, 502	2SD468 (B, C)			4
503, 504
X601	2SD636 (R, S)			1
D301, 401, 302	HV80	Si. Diode		8
402, 303, 403
304, 404
D501	HZ7C	Zener Diode		1
D502	HZ9B2	"		1
D503	10E2-B	"		1
D601 ~607	SLP146B	Si. Diode		7
D608	HZ6B	Zener Diode		1
L301, 401, 305	VQP0001-183	Inductor		6
405, 306, 406
L302, 402	VQZ0006-001	Dolby Filter		2
L303, 403	VQZ0004-001			2
L304, 404	VQP0001-562	Inductor		2
L501	VQP0002-471M	"		1
L502	V03083-019	OSC Coil		1
C301, 401	QEB41HM-224	E. Capacitor (Low Leak)	0.22 μF 50 V	4
323, 423
C302, 402, 312	QET41CR-107	E. Capacitor	100 μF 16 V	5
412, 502				_
C303, 403	QEB41EM-106M	E. Capacitor (Low Leak)	\| 10 μF 25 ∨	2
C304	QET41CR-476	E. Capacitor	47 μF 16 V	1
C305, 405	QCS11HJ-510	C. Capacitor	51 pF 50 V	2
C306, 406, 308	″ -151		150 pF "	6
408, 506, 507
C307, 407	" -561	"	560 pF "	2
1

Page 24

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
C309, 409	QET41AR-107	E. Capacitor	100 μF 10 V	2
C310, 410	QET41ER-226	"	22 μF 25 V	2
C313, 413	QET41HR-474	"	0.47 μF 50 V	2
C315, 415, 317	QFM41HJ-103	Mylar Capacitor	0.01 μF ″	9
417, 361, 461
366, 466, 524
C316, 416, 321	QET41CR-106	E. Capacitor	10 μF 16 V	15
421, 330, 430
333, 433, 334
434, 335, 435
603, 311, 411
C319, 419	QCS11HJ-820	C. Capacitor	82 pF 50 V	2
C320, 420, 342	QET41HR-335	E. Capacitor	3.3 µF "	14
442, 350, 450
351, 451, 352
452 353 453
378 478
C322 422	OCS11HJ-391	C Capacitor	390 pF "	2
347 447
C325 425	OFM41H.I-473	Mylar Capacitor	0.047 µF "	4
363 463
C326 426 503	OET41CB-227	F Capacitor	220 µF 16 V	3
C327 427 526	OFT414B-227	"	220 µF 10 V	3
C328 428	OFB41HM-104	E Capacitor (Low Leak)	0.1 u F 50 V	4
343 443	GED4111111104		0.1 /
C329 429	OEB41HM-334	E Capacitor (Low Leak)	0.33 µE 50 V	4
360 460	0200411101004		0.00 µ1 00 V
	OEM41H L472	Mylar Capacitor	0.0047.0F 50.V	4
338 438	011014110-472		0.0017 #1 00 1
C332 432	" -273		0.027 µF "	2
C336 436	"-562	"	0.0056 µ F "	2
C337, 437	OCS11HJ-251	C. Capacitor	250 pF "	2
C340 440	QCY41HK-681	Mylar Capacitor	680 pF "	4
371 471
C341 441	QFM41HJ-102	"	0.001 µF "	2
C345 445	"-123		0.012 µF "	2
C346, 446	QET41HB-105	E. Capacitor	1 µF "	4
349 449
C355, 455, 322, 422	OCS11HJ-331	C. Capacitor	330 pF "	6
356 456
C357 457	" -200	"	20 pF "	2
C358 458	"-301		300 pF "	2
C362 462 602	OFT41HB-475	E Capacitor	4.7 uF "	3
C364 464	OFM41HJ-823	Mylar Capacitor	0.082 µF "	2
C365 465 515			0.0033 µF "	3
C368 468	OFB41HM-105	E. Capacitor	1 µF "	2
C369 469	OCY41HK-222	C Capacitor	0.0022 //F "	2
C370 470	OFT41AB-476	E Capacitor	47 µF 10 V
C372 472	0051141560	"	56 pF "	2
C373 473 601	OFT41CR-336		33 µF 16 V	3
C375 475	OFM41HK-823	Mylar Capacitor	0.082 µF 50 V	2
C376 476 508	OFT41AR-108	E Capacitor	1000 µF 10 V	3
C377 477 516	OFM41H.I-223	Mylar Capacitor	0.022 µF 50 V	3
C505	OCS11H 1-361	C. Capacitor	360 pF "	1
C509 513	OFT41CB-477	E. Capacitor	470 µF 16 V	2
C510	-108	11	1000 µF "	1
C512	OCS11HJ-271	C. Capacitor	270 pF 50 V	1
C514	OFM41HJ-333	Mylar Capacitor	0.033 µF 50 V	1
C518	OFM42AK-822	// //	0.0082 µF 100 V	1

Page 25

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
C519	QCF11EZ-222	C. Capacitor	0.0022 µF 25 V	1
C520	OFM424K-222	Mylar Capacitor	0.0022 //F 100 V
C520	"
0521	-392		0.0039 µF
0522	-152		0.0015 µF	\| 1
C523	-682		0.0068 μF "	1
C524	0CY41HK-332	C. Capacitor	0.0033 μF ″	1
C525	QET41CR-228	E. Capacitor	2200 μF 16 V	\| 1
C527, 517	QET41AR-477		470 µF 10 V	2
R303, 403	QRD147J-225S	C. Resistor	2.2 MΩ 1/4 W	2
B305 405 313	"-4725	n ^*	47k0 "	8
A13 318 A18	1720		4.7 102	U
242 442
D206 406	// 1000		10.0
R306, 406	-1005		10.22	5
506, 514, 517
R308, 408	" -223S		22 kΩ "	4
520, 604
R309, 409	" -334S		330 kΩ "	4
325, 425
B310 410 339	" -1815		180 0 "	6
	1015		100.75	U
	// 1000		1010 //
R311,411	-1225		1.2 KS2	4
370,470
R312, 412	/ " -272S	,	2.7 kΩ "	2
R316, 416	" -682S	11	6.8 kΩ ″	4
317, 417
B322 422	ORD143J-333S		33 kΩ "	2
B324 424 362	OBD1471564S	"	560 kQ "	6
462 505 602	2101473-3043		300 K32	0
	// 1500	,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
R326, 426	-1525		1.5 K32	2
R332, 432	-220S		22 \Q "	2
R334, 434	// ·102S	\| "	\| 1 kΩ ″	4
335, 435
R336, 436	" -184S	"	180 kΩ ″	2
R337, 437	" -274S	"	270 kΩ ″	2
B338 438	″ - 332 S		33k0 "	4
364 464	0020		0.0 112
B341 441	// 1739	,,	47 40 "
	-4733
N342, 442	-1045		100 K32	2
R348, 448	-3948		390 K12	2
R360, 460			680 Ω "	2
R501	ORD121J-106	"	10 MΩ 1/2 W	1
R508, 509, 511, 512	QRH141J-100	Fusible Resistor	10 Ω 1/4 W	4
R517	QRD147J-680S	C. Resistor	68 Ω "	1
R518	QRD147J-121S	C. Resistor	120 Ω "	1
R606	" -151S	"	150 Ω ″	1
R521	-4R7S	"	47.0. "	1
B523 524	OBX019L180	ME Besistor	10 1W	2
R526	0PD1/11/2710	C Pasistor
B602	0001413-2/13		27032 1/4 W
	URD14/J-5635		50 K17
R605	-331S		330 \2 "	1
R614			33 Ω "
	\| V44611-002	Formed Bus Wire		8
	······································	"		8
	· · 005	"		9
		"		3
	V44691-001	Wire Clamp		12
				12
		Connector
CIN502P
CN503P	-003
	VYH45/4-001	Radiation Plate
	\| VYH4334-001	Earth Contact		\| 1 \|
	SPSP3012ZS	Screw
	A74138-2	Test Pin		6
	L	L

Page 26

Tuner P.W. Board Parts

Pin	IC	1	IC 2
No.	FM	АМ	FM/AM
1	1.8	1.2	6.5
2	1.8	1.2	2.1
3	5.2	1.8	2.9
4	1.8	2.0	2.5
5	0	0	2.3
6	1.3	1.3	5.1
7	2.0	2.0	0
8	2.0	2.0	0.5
9	2.2	2.4	1.5
10	2.2	2.4	1.3
11	5.4	5.8	1.3
12	3.5	0.5	0.1
13	0	0	1.3
14	2.0	2.0	1.3
15	0.3	0.2	1.3
16	0.9	0.9	0.4

			E	С	в
X1	2SK212	FM RF AMP.	(K) 0	(A) _3.0	0
X2	2SC1342	FM LOC OSC	1.2	5.2	1.9
X3	2SC535	FM MIX	1.3	5.3	2.0
X4	2SC2839	AM LOC OSC	2.0	4.7	2.5
X6	2SC1684	Switching	ĥ.
X7	2SC1684	Switching
X8	2SC458	AM AGC Amp.	\|
X9	2SC1684	LED Drive	J
X10	2SC458	LF Amp.	1.0	3.8	1.6
X11	2SC458	LF Amp.	1.0	3.8	1.6

		в	С	Е			в	С	Е			В	С	.Ε
X6	АМ	0.7	0.03	0	×8	FM No. Signal	0.01	5.7	0.2	х9	FM No. Signal	0.2	5.1	0
	FM	0.35	0.2	0		EM					EM		25	0
X7	FM No.	0	1.5	0		Signal	1.4	5.6	0.8		Signal	0.7	3.5	0
	FM	0	0.03	0		AM No. Signal	0.01	6.2	0.2		AM No. Signal	0.1	5.2	0
	Signal					AM					AM	0.7	22	0
	AM	0	1.5	0		Signal	1.9	5.9	1.3		Signal	0.7	2.5

Page 27

Tuner P.W. Board Parts

			the second se	the second	and the second sec
			E	с	В
×1	2SK212	EM RE AMP.	(K) ₀	(A) _3.0	0
X2	2SC1342	FM LOC OSC	1.2	5.2	1.9
хз	2SC535	FM MIX	1.3	5.3	2.0
X4	2SC2839	AM LOC OSC	2.0	4.7	2.5
X6	2SC1684	Switching	'n
X7	2SC1684	Switching
×8	2SC458	AM AGC Amp.	] [
X9	2SC1684	LED Drive	]
×10	2SC458	LF Amp.	1.0	3.8	1.6
X11	25C458	LE Amo	1.0	3.8	1.6

Fig. 29

	1	В	С	Е			в	С	E			В	C	Έ
X6	AM	0.7	0.03	0	X8	FM No. Signal	0.01	5.7	0.2	X9	FM No. Signal	0.2	5.1	0
	FM	0.35	0.2	0							EM
×7	FM No.	0	1.5	0		⊢M Signal	1.4	5.6	0.8		Signal	0.7	3.5	0
	Signal				4	AM No.	0.04	6.0	0.0		AM No.	0.1	52	0
	FM	0	0.03	0		Signal	0.01	6.2	0.2		Signal	0.1	0.2	-
	Signal					0.04					AM		1 2 2
	AM	0	1.5	0		Signal	1.9	5.9	1.3	1.1	Signal	0.7	2.3

Motor

No. 1422

Page 28

Tuner P.W. Board Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
	VMW2151-001	P. W. Board	for Tuner	1
IC1	HA12413	IC		1
1C2	AN7410	"		1
X1	2SK212 (E)	Transistor		1
X2	2SC1342 (B)	"		1
X3	2SC535 (B)	"		1
X4,5	2SC2839(D)	"		2
X6, 7, 9	2SC1684 (R, S)	"		3
X8, 10, 11	2SC458 (C)	"		3
D1	MA345	Si. Diode		1
D2, 4	HV80	"		2
D3, 5	1N34A	Ge Diode		2
	V44611-002	Formed Bus Wire	(10 mm)	23
	V44611-005	"	(12.5 mm)	2
	VKL3143-001	Board in Tab		13
BPF1	VBP3M5F-001	Band Pass Filter		1
LPF1	VQZ0011-001	Low Pass Filter		\| 1
	VYH4694-001	Shield Case		1
CF1, 2	VCF2L3B-102	Ceramic Filter		2
L1,5	VQF1B20-001	Coil	FM	2
L2	VQP0004-R68	Inductor	FM	1
L4, 6	VQB012B-302T	Bar Antenna		\| 1
L7	VQR1014-301	Ant. Coil	SW	1
L8	VQL1T03-301	OSC Coil	LW	1
L9	VQM1T03-301		MW	1
L10	VQS1T03-205		SW	1
IFT1	VQT7F12-104	IFT	FM	1
IFT2	VQT7F07-501		"	1
IFT3	VQT7A11-301		AM	\| 1
CFT1	V03067-026	CFT	AM	1
	VYH4369-003	Shield		1
VR1	QVP8A0B-014	V. Resistor		\| 1
VR2	QVP8A0B-054			1
RI	URD147J-220S	C. Resistor	22 S2 1/4 W	1
R2,6	-471		470 \Q "	2
R3, 37	-6825	,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,	6.8 kΩ "	2
R4, 23, 28	-3925		3.9 ks2 "	3
	-1525		1.5 KS2 "	2
	-1045		100 kS2 "	2
R12, 22	-3345			2
R14,43	-3313			2
R16	-4703 // _1010			5
R17 40 87 88
R19 27				4
R21	.2219	"	220 0 "
R24, 31	.1825	"	18k0 "
B25 51	-5625		56k0 "	2
B26.48	" -3325	"	33k0 "	2
R32	-4725		47k0 "
R33, 91, 92	"- 333 S		33 kΩ "	Δ
R35	"-823S		82 kΩ "
R43	··· -473S	"	47 kΩ "	1
R41, 54, 56, 34	······································	"	150 kΩ "	4
R46, 53	" -103S	"	10 kΩ "	2
R47	" -222S	"	2.2 kΩ ″	1
R55, 36	·· -393S	"	39 kΩ "	2
R81	" -100S	"	10 Ω "
R82	" -183S	"	18 kΩ "	1
R85, 86	" -123S	"	12 kΩ "	2
R89, 90, 83	" -102S	"	1 kΩ "	3
	1

Page 29

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
R93, 94	QRD147J-272S	C. Resistor	2.7 kΩ 1/4 W	2
C1	QCT05CH-180	C. Capacitor	18 pF "	1
C2, 16, 35, 62	QCF11EZ-103		0.01 μF 25 V	4
C3	QCT05CH-5R0	"	5 pF 50 V	\| 1
C4	QCT05CH-7R0	"	7 pF "	1
C5	QCT05CH-100	"	10 pF	1
C7, 8, 33, 45	QCF11EZ-223		0.022 μF 25 V	5
56, 61, 67
C11.24	QCS11HJ-8R0	"	8 pF 50 V	2
C21	′′ -150	"	15 pF "	1
C12, 13, 14	QCT05CH-150	"	15 pF	3
C15	" -120	"	12 pF	1
C20. 32	QCS11HJ-3R0	"	3 pF 50 V	2
C22	" -390	"	39 pF "	1
C23.25	′′ -100	"	10 pF "	2
C26	" -270	"	27 pF "	1
C27.6	"-331	"	330 pF "	2
C28	QFS21HJ-392	P. Capacitor	0.0039 μF ″	1
C30	OCS11HJ-390	C Capacitor	39 pF "	1
C31	QFS21HJ-181	P. Capacitor	180 pF "	1
C29	OCT05WK-120	C. Capacitor	12 pF	1
C34 46	OFT41AB-107	E. Capacitor	100 µF 10 V	2
C36 42 43	OCF11F7-473	C. Capacitor	0.047 µF 25 V	3
C41	OCY41HK-472	"	0.0047 µF 50 V	1
C51	OFT41CB-106	E. Capacitor	10 µF 16 V	1
C52 53 54	OFM41HM-223	Mylar Capacitor	0.022 µF 50 V	3
C55	OFT41AB-227	F Capacitor	220 pF 10 V	1
C57	OCE11EM-223	S. F. Capacitor	0.022 µF 50 V	1
C63	OFT41CB-226	E. Capacitor	22 µF 16 V	1
C64	OCF11EM-103	S. E. Capacitor	0.01 µF 50 V	1
C65	OFM41HM-103	Mylar Capacitor	0.01 µF "	1
C66	OET41AB-476	E. Capacitor	47 μF 10 V	1
C68	OEB41HM-105		1 μF 50 V	1
C69, 93, 94, 44	QET41HR-475		4.7 μF "	4
C70, 72, 73	QCS11HJ-151	C. Capacitor	150 pF "	3
C71	QET41HR-105	E. Capacitor	1 µF "	1
C81, 88, 89, 91, 92	QET41HR-335		3.3 µF "	5
C82	QFS21HJ-471	P. Capacitor	470 pF "	1
C83, 84, 86	OEC41HM-474	E. Capacitor	0.47 µF "	3
C85	QFM41HM-473	Mylar Capacitor	0.047 μF ″	1
C87.90	"-333	"	0.033 µF "	2
C95	QET41AR-477	E. Capacitor	470 μF 10 V	1
VC1-1, 2, 3, 4	QAP1224-512	V. Capacitor		\| 1
TC1-1, 2, 3, 4
TC3-1, 2	QAT2002-001	T. Capacitor		2
TC2-1, 2
S1-110	QSSA401-002	Slide Switch		1
CN2-15	QMV5005-005	Connector	5 P	1
CN1-13	QMV5005-003	"	3 P	2
CN3-13			_

Page 30

Power Supply P.W. Board Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
	VMW3124-001	P. W. Board		1
D801, 802	DS131A	Si. Diode		1
D803, 804	DS132A	**		1
C801, 802, 803	QCF11EZ-223	C. Capacitor	0.022 μF 25 V	3
C804, 805	QCC11EM-154	ii ii	0.15 μF ″	2
	VKL3143-001	Board in Tab		2
J801	QMC0263-002BS	AC Socket	RC-656LB	1
	QMC0263-002	"	RC-656L	1
S801-1, 2	QSS2325-101BS	Slide Switch	RC-656LB	1
	QSS2325-101		RC-656L
	QMF51A2-1R25BS	Fuse	RC-656LB	1
	QMF51A2-1R25		RC-656L
	A44594-001	Fuse Clip		2

Page 31

Packing

Instraction Book, etc.

Packing Material Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
1	VPH4103-002	Door Protector		1
2	VPH1213-001	Side Cushion	Left	\| 1
3	VPH1214-001	Side Cushion	Right	\| 1
4	VPD5066-J01	Carton	RC-656LB	1
	VPD5066-J03	11	RC-656L	1
2~4	VDP5066-002A	Carton Ass'y	RC-656L	1
5	QPGA065-05004	Poly Bag	for set	1
6	VHPJ109-039	Paper Sheet		1

Accessories

Parts Name	Remarks	Q'ty
Cassette Tape		1
Power Cord	RC-656LB	1
	RC-656L	1
Warning Label	RC-656LB	1
Poly Bag	for power cord	1
Feature Sticker		1
Mark	RC-656LB	1
Head Cleaning Stick		1
Poly Bag	for Instruction Book	1
Guarantee Certificate	RC-656LB	1
Instruction Book		1
Troubleshooting		1
	Parts Name Cassette Tape Power Cord " Warning Label Poly Bag Feature Sticker Mark Head Cleaning Stick Poly Bag Guarantee Certificate Instruction Book Troubleshooting	Parts NameRemarksCassette TapeRC-656LBPower CordRC-656LB"RC-656LBWarning LabelRC-656LBPoly Bagfor power cordFeature StickerRC-656LBMarkRC-656LBHead Cleaning Stickfor Instruction BookGuarantee CertificateRC-656LBInstruction BookTroubleshooting

Page 32

JVC SERVCE MANUAL

MODEL RC-656LD

LW - MW - SW - FM

4-BAND STEREO RADIO CASSETTE RECORDER

Please note that the model RC-656LD is the same as RC-656L except relation parts to the enclosure assembly. As the other parts not listed here are the same as those of RC-656L, refer to the service manual (No. 1422) of the model RC-656L/LB.

Assembly Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
(1-8,13,) (21,22) 1 2 3 4	ZCRC656LD-CBF VJC1225-002 VJD4005-002 VJD4412-002 VJD4413-001	Front Cabinet Ass'y Front Cabinet Reflection Plate Button Plate Fitting		1 1 1 1
5 6 7 8 10	VJK3159-004 VJK3160-003 VJK3161-001 VJK4123-002 VYH4102-001	Dial Scale (A) '' (B) Dial Lens Scale Plate (A) Mic. Bushing		1 1 1 2
11 12 13 14 15	VMME62N-026 VYH4298-001 VJD4018-002 VMW1023-102D QMV5005-003	E.C. Mic. Holder Mark P.W. Board Connector	for Mic. CN701-1 ~ 3	2 2 1 - 1
16 17 18 19 20	EAS5PH08SA VYH4565-002 QEN21EM-335 VKY4165-002 VYH4352-002	Speaker Tweeter Holder N.E. Capacitor Door Spring Clamp	SPK R302 C380, C480 3.3 μF, 25 V for Tweeter	1 1 2 1 1
21 22 23 24 25	V44981-001 VYH4389-001 VKZ4001-007 EAS16P127SH VYH2122-002	Earth Catcher Wire Holder Speaker Chassis Base	SPK R301, SPK R401	1 1 7 2 1
26 27 28 29 30	VYH4032-001 VYH4002-001 RTA4020 V42562-1 RTA4010	Roller Rivet Special Washer Rivet		1 4 1 3 1
31 32 33 34 35	V41336-021 VJK4124-002 VYH3177-003 RCSA6000 VHR2TT9-05A	Tuning Shaft Scale Plate (B) Dial Drum C. Ring Dial Rope	1005 mm	1 1 1 1
36 37 38 39 40	E45679-001 VJN4049-00A EAS5PH08SA VYH4352-002 VMW1023-102C	Spring Needle Ass'y Speaker Clamp P.W. Board	SPKR402 for Tweeter for Tuner LED	1 1 1 -

Page 33

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
41 42 43 44 45	SLP146B QRD147J-471S "-101S VJH3005-00S VYH3120-001	L.E.D. C. Resistor Handle Ass'y	D201, D202 R201 R202	2 1 1 1 2
45 46 47 48 49 52	V44943-001 V44944-001 VYH4224-001 VYH4556-001 VYH2124-002	Washer (L) " (R) Bracket " Tuner Chassis		1 1 1 1 1
53 54 55 56 58	VXQ3018-006 QAT5001-203 VYH4516-002 VYH4221-001 QET41CR-227	Toggle Lever M.V. Capacitor Fine Tuning Bracket Arm E. Capacitor	for Band C702	1 1 1 1
59 61 62 63 64	VMW3035-302 VYH2125-002 VYH4567-001 VXQ3028-004 VXQ3032-003	P.W. Board Holder Earth Plate Toggle Lever	for R/P Head	1 1 2 1
65 66 67 68 70	VXQ3033-002 VJD3232-001 VJC1226-002 QZR4333-001 VYH4010-002	" Jack Board Rear Cabinet Rod Antenna Battery Contact		1 1 1 2
71 72 73 74 75	53738-009 V44686-002 VYH4568-00B VND4027-005 VYN5066-020C	Spring W Shield Ass'y Dolby Label Name Plate		1 1 1 1 1
76 77 78 79 80, 81	V41583-3 VYSA1R4-050 VJT4029-00A V44910-002 ZCRC656LD-BCA	Tape Spacer Cassette Door Ass'y Cassette Spring Battery Cover Ass'y		1 6 1 2 1
80 81 82 83 84	VJC2016-006 VYSH106-020 VYSA1R6-009 VXKM520-20013 VXL4008-002	Battery Cover Spacer Knob Tuning Knob		1 1 4 1 1
85 86 87 88 89	VXL4122-002 VXL4123-002 53866-2 VTP54N2-12E VYH4570-003	Knob Label Power Transformer Transformer Bracket		3 1 1 1
90 91 92 101 102	VJD3332-001 VYH4936-001 VJD4508-001 REE3000 WBS3000N	Punching Panel Damp Holder Antenna Cover E-Ring Washer	Chassis Base P.W.B. – Mecha.	1 1 1 1 1
103 104 105	DPSP3006ZS SBSF3008Z SBSF3010Z	Ass'y Screw Tapping Screw "	Trans. Bracket E.C. Mic. Holder x 2, Mic. Wire Terminal x 1, Tweeter x 2, Earth Catcher x 1, Woofer x 8, L.E.D. P.W.B. x 1, Connect Bracket x 2, Holder (B) x 4 Tweeter Holder – Front Cabinet x 2, Door Spring x 1 Chassis Ass'y – Front Cabinet x 5, Dump Ass'y x 2, Tuper Chassis – P.W.B. x 2, Eine Tuming Bracket x 1	2 21 17
106	SBSE2012C		Holder – P.W.B. x 2, Jack Board – P.W.B. x 2	Q
107 108 100	SBSF 3012C SBSF3020R SBSF4020C SDSP3010PS		Arm Ass'y – Front Cabinet x 5, Front Cabinet – Rear Cabinet Trans. Bracket Eront Cabinet – Bear Cabinet x 2, Bracket x 4	626
110 111 112 113	SPSP3006VS SPSP3012VS SPSP3014ZS SPSP3014ZS SPSP3035VS SPSP3035VS	Screw	P.W.B. – Mecha. Bracket P.W.B. – Mecha.	2 1 2 1
114	SDSP3010RS	Screw	Front Cabinet – Rear Cabinet	2

Page 34

Page 35

8C-656LD PC 656LD

Unit-Volt

No.

FM AM FM/AM

18 12

1.8

5.8

ST/MONO

Signal

Signal FM

Signal Signa FM No

Signa FM Signal AM No

0.8

- ICH

- 4 -

3) LAST NO. FOR RESISTORS AND CAPACITORS ARE R95 & C97.

Page 36

Tuner P.W. Board Parts List

Ref. No.	Parts No.	Parts Name	Remarks	Qʻty
IC1	HA12413	I.C.		1
IC2	AN7410N			1
BPF1	VBP1M3F-001	B.P. Filter		1
X1	2SK212(E)	Transistor
X2	2SC1342(B)
X3	2SC535(B)			1
	2SC2839(D)
	2SC1684(R S)			3
X8. 10. 11	2SC458(C)			3
D2	HV80	Si. Diode		1
D5	1N34A	Ge. Diode		1
L1	VQF1B20-001	Coil		1
L2	VQP0004-R68	Inductor		1
L4, 6	VQB012B-302	Bar Antenna
	VQF1B20-001		SW
	VOI 1T03-301
	-301	"	MW	1
	VQS1T03-205	"	SW	1
IFT1	VQT7F12-104	I.F.T.	IFT	1
IFT2	VQT7F07-501		FM	1
IFT3	VQT7A11-301	"	AM	1
CFT1	V03067-026	C.F.T.	AM	1
	VYH4369-003	Shield
	VYH4728-002	Shield Plate		1
	VBP1M3F-001	B.P. Filter		1
	VCE2L3B-102			2
VC1-1 4. VC2-1 4	QAP1224-512	V. Capacitor		1
TC3-1, 2, TC2-1, 2	QAT2002-001	T. Capacitor		2
S1-1 10	QSSA401-002	Slide Switch		1
CN1-1 3, CN3-1 3	QMV5005-003	Connector		2
CN2-1 5	-005 0 AD1224 512	V. Capacitor
	0V72512 102	V. Capacitor		1
	0VP8A0B-053			1
R1	ORD147.J-220S	C. Resistor	22 Ω 1/4 W	1
R2	-470S	"	47 Ω ″	1
R3, 37	" -682S	"	6.8 kΩ "	2
R4, 23, 28	" -392S	"	3.9 kΩ "	3
R5, 13	" -152S		1.5 kΩ "	2
R6	······································
	-8245		330 Ω "
R15 19 42 40 57	-3313 "_470S	"	47 Ω "	5
R16	-4705 " -181S		180 Ω "	1
R17, 40	······································	"	27 kΩ ″	2
R19, 27	" -101S	"	100 Ω "	2
R21, 45	" -221S	"	220 Ω "	2
R22	" -334S		\| 330 kΩ "
R24, 31	-182S			2
	-5625			2
R33 46 53 55	-3325		10 kΩ "	4
R34	ORD1431-2229		22kΩ "	1
R36	QRD147J-393S	"	39 kΩ "	1
R41	-153S		15 kΩ ″	\| 1 \|
R47	" -222S	"	2.2 kΩ "	\| 1 \|
\| R54	QRD143J-224S		220 kΩ ″	1

Page 37

Ref. No.	Parts No.	Parts Name	Remarks	Q'ty
R71	QRD143J-102S	C. Resistor	1 kΩ 1/4 W	1
B81	QRD147J-100S	"	10 Ω ″	\| 1
B82	" -183S	"	18 kΩ ″	\| 1
B83	" -102S	"	1 kΩ ″	1
R85, 86	" -272S		2.7 kΩ ″	2
B87 88	" -472S		4.7 kΩ ″	2
B89 90	" -271S	"	270 Ω ″	2
B91 92	″ -684 S	"	680 kΩ ″	2
R03 04	" -8225	"	8.2 kΩ ″	2
B96	ORD143J-334S	"	330 kΩ ″	1
C1 12	OCT05CH-220	C. Capacitor	22 pF 50 V	2
	OCE11E7-103		0.01 µF 25 V	4
			3 nF 50 V	li

	-780	,,	10 pF "	1
			220 mE //	2
	QCS11HJ-331
C7, 8, 33, 45, 56, 61, 67	QCF11EZ-223
C14, 21	QCS11HJ-150
C15	QCT05CH-120
_C20, 32	QCS11HJ-3R0		3 pF	2
C22, 30	" -390	"	\| 39 pF "	2
C23	··· -100	"	\| 10 pF "	1
C24, 25	" -8R0	• "	\|8pF "	\| 2
C26	// ·270	"	\| 27 pF	\| 1
C28	QFS21HJ-392	"	0.0039 μF ″	1
C29	QCT05WK-120	"	12 pF	\| 1
C31	QFS21HJ-181	P. Capacitor	180 pF 50 V	\| 1
C34, 55	QET41AR-227	E. Capacitor	\| 220 μF 10 V	\| 2
C36, 42, 43	QCF11EZ-473	C. Capacitor	0.047 μF 25 V	3
C41	QCY41HK-472		0.0047 μF 50 V	1
C44 69 93 94	OET41HR-475	E. Capacitor	4.7 μF "	4
C46	OET41AB-107		100 µF 10 V	1
C51	OFT41CB-106	"	10 µF 16 V	1
C52 53 54	OFM41HM-223	"	0.022 μF 50 V	3
C57	OCC11EM-223	"	0.022 μF 25 V	1
C63	OFT41CB-226		22 µF 16 V	1
	0CC11EM-103	"	0.01 µF 25 V	2
C66	OET41AB-476	"	47 µF 10 V	1
	00511HJ-151	C Capacitor	150 pF 50 V	3
C71	OFT41HB-105	E. Capacitor	1 µF "	1
C81 88 80 01 02	"	"	33 µ F "	5
692		P. Capacitor	470 pF "
	OEC41HM-474		0.47 // E "
	OEM/1UM /72	M Capacitor	0.047 //F "
	.152		0.015 µF "	2
		C. Capacitor	5.010 ml	1
695	UCSTIHJ-SKO	C. Capacitor	5 PF

JVC RC656L SERVICE MANUAL

SERVICE MANUAL

Contents

Specifications

Features

Names of Parts

Removal of Main Parts

2. Amplifier P.W. Board Ass'v

Removal of Cassette Mecha Parts

Adjustment of Cassette Recorder

Head replacement and angle adjustment

Flywheel thrust adjustment

Pause operation check

Adjustment of pinch roller contact force

Fast forward/rewind torque adjustment

How to Engage Dial Cord

Adjustment of Cassette Recorder Amplifier

Tuner Alignment

4-3 Alignment:

(A) Parts Location on Tuner P.C.B.

(B) Dummy Antenna

Block Diagrams

Schematic Diagram of RC-656L/LB (Tuner Circuit)

Wiring Connection

Mechanical Component Parts

Mechanical Component Parts List

Assembly Parts List

Amplifier P.W. Board Parts

Amp. P.W. Board Parts List

Tuner P.W. Board Parts

Tuner P.W. Board Parts

Tuner P.W. Board Parts List

Power Supply P.W. Board Parts List

Packing

Packing Material Parts List

Accessories

JVC SERVCE MANUAL

MODEL RC-656LD

Assembly Parts List

Tuner P.W. Board Parts List