Marantz PM-17SA DC Offset Voltage Alignment, Electrical Parts List, Idling Current Alignment

7. DC OFFSET VOLTAGE ALIGNMENT

1. Before switching the mains switch. Turn down the master volume to the minimum position and set the balance volume and tone volumes at the center po- sitions. Set variable resistors R627(on the PCB P601:L ch) and R727(on the PCB P701:R ch) fully counterclockwise.

2. Connect the digital voltage meter to the speaker terminal. And set the digital voltage meter for the DC position.

3. Turn the mains switch ON. Put thin adjustment screw driver in to the hole of the HDAM (Q601:L ch / Q701:R ch) copper cover. Adjust variable resis- tors in the HDAM (Q601:L ch / Q701:R ch) value at 0mV±3mV with in 10 seconds after speaker relay turn ON.

Alignment hole

9. ELECTRICAL PARTS LIST

ASSIGNMENT OF COMMON PARTS CODES.

RESISTORS

R		: 1) GD05 ⋅ ⋅ ⋅ 140, Carbon film fixed resistor, ±5% 1/4W
	R	: 2) GD05 ⋅ ⋅ ⋅ 160, Carbon film fixed resistor, ±5% 1/6W
		{

➀Resistance value

Examples ;
➀Resistance value
0.1 Ω ....	001	10	Ω ....	100	1 kΩ ....	102	100 kΩ ....		104
0.5 Ω ....	005	18	Ω ....	180	2.7 kΩ ....	272	680 kΩ ....		684
1 Ω ....	010	100	Ω ....	101	10 kΩ ....	103	1	MΩ ....	105
6.8 Ω ....	068	390	Ω ....	391	22 kΩ ....	223	4.7	MΩ ....	475

Note : Please distinguish 1/4W from 1/6W by the shape of parts used actually.

CAPACITORS

C : CERAMIC CAP.
3) DD1 ⋅ ⋅ ⋅ ⋅ 370,	Ceramic capacitor

	{	Disc type
➁ ➂
		Temp.coeff.P350 N1000, 50V

Capacity value

Tolerance

Examples ;

➁Tolerance (Capacity deviation)

±0.25 pF .... 0

±0.5 pF ....	1
±5% ....	5

Tolerance of COMMON PARTS handled here are as follows :

0.5 pF	5 pF ....	±0.25 pF
6 pF	10 pF ....	±0.5 pF
12 pF	560 pF ....	±5%

➂Capacity value

0.5 pF ....	005	3 pF ....	030	100 pF ....	101
1 pF ....	010	10 pF ....	100	220 pF ....	221
1.5 pF ....	015	47 pF ....	470	560 pF ....	561

C : CERAMIC CAP.

⋅ ⋅ ⋅

NOTE ON SAFETY FOR FUSIBLE RESISTOR :

The suppliers and their type numbers of fusible resistors

are as follows;
1. KOA Corporation
Part No. (MJI)				Type No. (KOA)				Description
NH05 ⋅ ⋅ ⋅ 140				RF25S ⋅ ⋅ ⋅ ⋅ ΩJ				(±5% 1/4W)
NH05 ⋅ ⋅ ⋅ 120				RF50S ⋅ ⋅ ⋅ ⋅ ΩJ				(±5% 1/2W)
NH85 ⋅ ⋅ ⋅ 110			RF73B2A ⋅ ⋅ ⋅ ⋅ ΩJ					(±5% 1/10W)
NH95 ⋅ ⋅ ⋅ 140			RF73B2E ⋅ ⋅ ⋅ ⋅ ΩJ					(±5% 1/4W)
{	Resistance value				{	Resistance value
							(0.1 Ω − 10 kΩ)
2. Matsushita Electronic Components Co., Ltd
Part No. (MJI)				Type No. (MEC)				Description
NF05 ⋅ ⋅ ⋅ 140				ERD-2FCJ ⋅ ⋅ ⋅				(±5% 1/4W)
RF05 ⋅ ⋅ ⋅ 140				ERD-2FCG ⋅ ⋅ ⋅				(±2% 1/4W)
NF02 ⋅ ⋅ ⋅ 140
RF02 ⋅ ⋅ ⋅ 140					{
{	Resistance value							Resistance value
Examples ;
Resistance value
0.1 Ω .... 001			10 Ω .... 100		1 kΩ .... 102				100 kΩ .... 104
0.5 Ω .... 005			18 Ω .... 180		2.7 kΩ .... 272				680 kΩ .... 684
1 Ω .... 010		100 Ω .... 101			10 kΩ .... 103				1 MΩ .... 105
6.8 Ω .... 068		390 Ω .... 391			22 kΩ .... 223				4.7 MΩ .... 475

ABBREVIATION AND MARKS

8. IDLING CURRENT ALIGNMENT

REMARK

Before “Idling current alignment”, “ DC offset voltage alignment “ have to be done!!

1. Each of cement resistor R641(on the PCB P601:Lch) and cement resistor R741(on the PCB P701:Rch) are provided

4) DK16 300, High dielectric constant ceramic

{	capacitor
➃
	Disc type
	Temp.chara. 2B4, 50V
	Capacity value

Examples ;

➃Capacity value

	100 pF .... 101	1000 pF .... 102 10000 pF .... 103
	470 pF .... 471	2200 pF .... 222
	: 5) ELECTROLY CAP. (				), 6) FILM CAP. (	)
C
	5) EA ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 10,			Electrolytic capacitor
	{ {		One-way lead type, Tolerance ±20%
	➄ ➅

ANT. : ANTENNA

CAP. : CAPACITOR

CONN. : CONNECTING

HP : HEADPHONE

µ-PRO : MICROPROCESSOR

RES. : RESISTOR

SW : SWITCH

TRIM. : TRIMMING

VAR. : VARIABLE

BATT. : BATTERY

CER. : CERAMIC

DIG. : DIGITAL

MIC. : MICROPHONE

REC. : RECORDING

SPK : SPEAKER

TRANSF. : TRANSFORMER

TRS. : TRAMSISTOR

X’TAL : CRYSTAL

with three test points. Connect the digital voltage meter, set for the DC voltage input, to the test points at the two

Examples ;

Working voltage Capacity value

extremities of three test points of R641(L ch) and R741(R ch).

2. After the setup above, turn the mains switch ON and heat up the amplifier about 10 minuetes.

3. Adjust variable resistors R627(on the PCB P601:L ch) and R727(on the PCB P701:R ch) according to the digital volt meter reading. The target setting value is 9mV±1mV(45mA) for both L ch and R ch.

Measurement point

R641 / R741

➄Capacity value

0.1	µF ....	104	4.7 µF ....	475	100	µF ....	107
0.33	µF ....	334	10 µF ....	106	330	µF ....	337
1 µF ....		105	22 µF ....	226	1100	µF ....	118
					2200	µF ....	228

➅Working voltage

6.3V	.... 006	25V .... 025
10V	.... 010	35V .... 035
16V	.... 016	50V .... 050

6) DF15	⋅ ⋅ ⋅ 350	Plastic film capacitor
DF15	⋅ ⋅ ⋅ 310	One-way type, Mylar ±5% 50V
DF16	⋅ ⋅ ⋅ 310	Plastic film capacitor

{	One-way type, Mylar ±10% 50V
➆
	Capacity value
Examples ;
➆Capacity value

0.001			µF (1000 pF)	102		0.1	µF ....	104
0.0018			µF	182		0.56	µF ....	564
0.01			µF	103		1	µF ....	105
0.015			µF	153
	: 1)	The above CODES ( R				, R	, C		, C	and
NOTE
		C
			) are omitted on		the schematic diagram in some
		case.
2)		On the occasion, be confirmed the common parts on
		the parts list.
3)		Refer to “Common Parts List” for the other common
		parts (RI05, DD4, DK4).

NOTE ON SAFETY :

Symbol Fire or electrical shock hazard. Only original parts should be used to replaced any part marked with

symbol . Any other component substitution (other than original type), may increase risk of fire or electrical shock hazard.

SM970926ACT

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