Sony MT-MZR70-165, MZ-R90/R91 Test Mode, 888xxxxxxxxxFREC1SHUF, t t . t . t t . t t . t X t

SECTION 4 TEST MODE

4-1. OUTLINE

•This set provides the Overall adjustment mode (Assy mode) that allows CD and MO disc to be automatically adjusted when in the test mode. In this overall adjustment mode, the protect switch is detected to judge the disc, CD or MO, and each adjustment is automatically executed in order. If a fault is found, the system displays its location. Also, the manual mode allows each indi- vidual adjustment to be automatically adjusted.

•The keys in the description refer to the keys on both set and remote commander unless otherwise specified. Though LCD display shows the LCD of the remote commander, same con- tents are also displayed on the LCD of the set.

4-2. TEST MODE

2In the normal mode, turn on the HOLD switch on the set. While pressing the x key on the set, press the following remote control keys in the following order:

>t > t . t . t > t . t

>t . t X t X

4-2-2. Operation in Setting the Test Mode

•When the test mode becomes active, first the display check mode is selected. (Press x key once, when the display check mode is not active.)

•Other mode can be selected from the display check mode.

•When the test mode is set, the LCD repeats the following dis- play.

4-2-1. Setting Method of Test Mode

There are two different methods to set the test mode:

1Short BP801 (TEST) on the MAIN board with a solder bridge (connect pin y; of IC801 to the ground). Then, turn on the

power.

–MAIN BOARD (SIDE B) –

LCD display

All lit

All off

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Microprocessor	001 V0.000
version
display

•When the X key is pressed and hold down, the display at that time is held so that display can be checked.

4-2-3. Releasing the Test Mode

For test mode set with the method 1:

Turn off the power and open the solder bridge on BP801 (TEST) on the MAIN board.

				IC502					88 89 90		AP521
25
									85 86 87
26									82 83 84					OFF		ON
28									78 80 81
														AP508
32									76 77 79
36									73 74 75		C537			AP504
147144 37 46 47 50 53 56 59 64 68146										72145
															AP505
38 40 42 45 48 51 55 57 60 63 66 67 70												R530
39 41 43 44 49 52 54 58 61 62 65 69 71												R529			S804
		FB502 FB503						L502							HOLD
	FB501
		R503		R508		R509	R510	FB504			C530
									C529
09
	AP507							AP1001				BP801
AP506															AP511
12											AP519 AP516
	88 87 86 83 81 78 74 72 69 64 63 60 58
10
	90 89 85 84 80 77 75 71 68 65 62 59 57
805 93 92 91 82 79 76 73 70 67 66 61 55 56											AP830				AP834
AP803	96 95 94								52 53 54		X801		AP517			AP907
	99 98 97					IC801			49 50 51					AP807
AP804	102101 100								46 47 48					C801		AP911
	105104 103								43 45 44
															AP806
	108104 106								40 41 42
	109110 111								37 36 39					5		4
	113114 112								34 35 36						IC802
	117116 115 4				7	10 13 16 19 22 27				32 33
											R935			8		1
32	119118 2			6	8	11 14 17 21 23			26 28 31
	120 1		3	5	9	12 15 18 20 24 25 29 30								AP5209
								BP801

Note: Remove the solders completely. Remaining could be shorted with the chassis, etc.

For test mode set with the method 2:

Turn off the power.

Note: If electrical adjustment (see page 20) has not been finished com- pletely, always start in the test mode. (The set cannot start in nor- mal mode.)

– 13 –