Sony MZ-R37 specifications Servicing Note

		TABLE OF CONTENTS
1.	GENERAL		4.	TEST MODE
	Looking at the controls	4	4-1. General		12
			4-2. Test Mode Setting		12
2.	SELF-DIAGNOSTIC		4-3. Test Mode Structure		12
2-1. General		5	4-4. Manual Mode		12
2-2. Test Mode Setting		5	4-5. Overall Adjustment Mode (Assy Mode)		15
2-3. Operation in Test Mode Setting		5	4-6. Hybrid Mode, Key Check Mode		16
2-4. Releasing the Test Mode		5	5.	ELECTRICAL ADJUSTMENTS	17
2-5. Self-Diagnostic Mode		5
2-6. Clearing the Error Indication Code			6.	DIAGRAMS
	and Total Recording Time	6
			6-1. IC Pin Descriptions		20
3.	DISASSEMBLY		6-2. Block Diagram – Servo Section –		25
3-1. Panel, Bottom		7	6-3. Block Diagram – Audio Section –		27
3-2. Panel (SV) Assy, Front		7	6-4. Block Diagram – System Control Section –		29
3-3. LCD Module		8	6-5. Printed Wiring Board		31
3-4. Connector		8	6-6. Schematic Diagram – Main Section (1/3) –		35
3-5. Main Board		9	6-7. Schematic Diagram – Main Section (2/3) –		38
3-6. Panel (SV) Assy, Upper		9	6-8. Schematic Diagram – Main Section (3/3) –		41
3-7. Cabinet (SV) Assy		10	7.	EXPLODED VIEWS
3-8. OP Block Assy		10
3-9. Holder Assy		11	7-1. Panel Section		49
			7-2. Cabinet (SV) Assy Section		50
			7-3. Mechanism Deck Section		51
			8.	ELECTRICAL PARTS LIST	52

SERVICING NOTE

1)When repairing this device with the power on, if you remove the main board or open the upper panel assy, this device stops working.

In this case, you can work without the device stopping by fastening the hook of the OPEN1 switch (S801) with tape.

panel assy, upper

MAIN board

tape

S801

2)This set is designed to perform automatic adjustment for each adjustment and write its value to EEPROM. Therefore, when EEPROM (IC803) has been replaced in service, be sure to per- form automatic adjustment and write resultant values to the new

EEPROM.

Refer to page 12 for details.

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